JP2020070765A - pump - Google Patents

Abstract

A pump capable of easily connecting a plurality of different types of motors to a pump casing having the same configuration and connecting a plurality of different types of pump main bodies to a motor casing having the same configuration. I will provide a. A pump (1) of the present invention connects a motor (2) having a motor casing (21), a pump body (3) driven by the motor and having an impeller (32) and a pump casing (31), and the motor casing and the pump casing. , and a connecting member 4, the impeller is rotated by the rotation of the motor shaft of the motor, and the pump casing has a suction port and a discharge port, and defines a flow path from the suction port to the discharge port. The impeller is accommodated in the passage, and the connecting member has a first fastening hole 41h and a second fastening hole 42h, is bolted to the motor casing through the first fastening hole, and is fastened to the motor casing through the second fastening hole. bolted to the pump casing. [Selection drawing] Fig. 2

Description

  The present invention relates to pumps.

  In a conventional pump, a motor casing and a pump casing are generally connected by bolt fastening (for example, Patent Document 1).

JP, 11-241698, A

  However, in the motor casing, the position, orientation, size, etc. of the bolt fastening holes may differ depending on the type of motor. Therefore, for example, it is attempted to connect a plurality of different types of motors to the same type of pump body. In that case, it was sometimes necessary to prepare a dedicated pump casing for each type of motor. On the contrary, in the pump casing, the position, direction, size, etc. of the bolt fastening holes may differ depending on the type of pump body. When connecting, it was sometimes necessary to prepare a dedicated motor casing for each type of pump body.

  The present invention can easily connect a plurality of different types of motors to the pump casing of the same configuration, and a plurality of different types of pump main bodies to the motor casing of the same configuration can be easily realized. The purpose is to provide a pump.

The pump of the present invention is
A motor having a motor casing;
A pump body driven by the motor, having an impeller and a pump casing;
A connecting member that connects the motor casing and the pump casing together,
Equipped with
The impeller is rotated by rotation of the motor shaft of the motor,
The pump casing has a suction port and a discharge port, defines a flow path from the suction port to the discharge port, and accommodates the impeller in the flow path,
The connecting member has a first fastening hole and a second fastening hole, is bolted to the motor casing through the first fastening hole, and is bolted to the pump casing through the second fastening hole. Has been done.

In the pump of the present invention,
It is preferable that the connecting member has a thickness in the axial direction of the pump of 55 mm or less.

In the pump of the present invention,
Further comprising a bearing that rotatably supports the motor shaft,
The impeller is fixed to the motor shaft,
It is preferable that the connecting member has an accommodating recess that accommodates the bearing.

In the pump of the present invention,
It is preferable that each of the coupling member and the bearing is located at a position overlapping the flow path in the direction perpendicular to the axis of the pump.

In the pump of the present invention,
A pump shaft disposed on the first side in the axial direction of the pump with respect to the motor shaft;
A coupling that connects the motor shaft and the pump shaft,
Further equipped with,
The impeller is fixed to the pump shaft,
The motor shaft and the pump shaft are
Touching each other, or
It is preferable that they are separated from each other in the axial direction of the pump and the distance between them in the axial direction is 5 mm or less.

In the pump of the present invention,
The coupling is at a position overlapping in the axial direction of the pump with respect to each of the connecting member and the flow path,
It is preferable that the end of the motor shaft on the first side in the axial direction is located on the first side in the axial direction with respect to the connecting member.

In the pump of the present invention,
The connecting member is
The motor casing is configured to engage with a first engaged portion provided in the motor casing, whereby the motor casing can be positioned with respect to the coupling member in the axial direction and the axial direction of the pump. A first engagement portion,
It is configured to engage with a second engaged portion provided in the pump casing, whereby the connecting member can be positioned with respect to the pump casing in the axial direction and the axis perpendicular direction. 2 engaging parts,
It is preferable to have

  According to the present invention, it is possible to easily connect a plurality of different types of motors to a pump casing having the same structure, and to connect a plurality of different types of pump bodies to a motor casing of the same structure. Yes, you can provide a pump.

It is a perspective view showing the pump concerning a 1st embodiment of the present invention. FIG. 2 is an axial sectional view showing the pump of FIG. It is an axial sectional view which expands and shows a part of pump of FIG. It is an axial sectional view which expands and shows a part of pump of FIG. It is a perspective view which shows a part of pump of FIG. It is a perspective view which shows the pump of FIG. 5 in the state which removed the motor casing and the motor shaft. FIG. 6 is an exploded perspective view showing the pump of FIG. 5 in a disassembled state. It is an axial sectional view which shows the pump which concerns on 2nd Embodiment of this invention by a one part side surface. It is an axial sectional view which expands and shows a part of pump of FIG. It is a perspective view which shows some pumps of FIG. It is a perspective view which shows the pump of FIG. 10 in the state which removed the motor casing and the motor shaft. FIG. 11 is an exploded perspective view showing the pump of FIG. 10 in an exploded state.

  INDUSTRIAL APPLICABILITY The pump of the present invention can be applied to a pump used for any purpose, for example, can be suitably applied to a coolant pump.

Embodiments of a pump according to the present invention will be described below with reference to the drawings.
The same reference numerals are given to common constituent elements in each drawing.

[First Embodiment]
1 to 7 show a pump 1 according to the first embodiment of the present invention. FIG. 1 is a perspective view showing a pump 1 according to this embodiment. 2 is an axial cross-sectional view of the pump of FIG. 1 partially shown in side view. In FIG. 2, the pump 1 is shown in a state in use.
1 to 3, the pump 1 of this embodiment is configured as a coolant pump. As shown in FIG. 2, the pump 1 is fixed to a tank T that stores a liquid (more specifically, a coolant liquid) F as a fluid F in use, and in that state, the liquid F in the tank T is fixed. Is boosted and discharged to the outside. The liquid F discharged from the pump 1 is supplied to a processing device or the like through a pipe (not shown), and then returned to the tank T again through a pipe (not shown).
As shown in FIGS. 1 and 2, the pump 1 according to the present embodiment connects a motor 2, a pump body 3 driven by the motor 2, a motor casing 21 of the motor 2 and a pump casing 31 of the pump body 3. The connecting member 4 is provided.

  Below, first, the motor 2 and the pump body 3 will be described in order. Then, the connecting member 4 will be described in detail.

<Motor 2>
First, the motor 2 will be described mainly with reference to FIGS.
3 and 4 each show a part of FIG. 2 in an enlarged manner. 1 to 4, the motor 2 has a motor casing 21 and a motor shaft (output shaft) 22 extending from the inside to the outside of the motor casing 21. Although illustration is omitted, inside the motor casing 21, a stator fixed to the motor casing 21 and a rotor rotated by the stator are housed, and the motor shaft 22 includes the rotor. It is fixed to.
The motor shaft 22 constitutes the rotary shaft 11 of the pump 1. In the present embodiment, the rotary shaft 11 of the pump 1 is composed of only the motor shaft 22.

Hereinafter, the central axis O of the pump 1 will be referred to as the central axis of the rotary shaft 11 (and thus the rotary axis). Further, the direction parallel to the central axis O of the pump 1 is referred to as "the axial direction of the pump (1)" or simply "the axial direction". Further, one side in the axial direction is referred to as an “axial first side (O1)”, and the other side in the axial direction is referred to as an “axial second side (O2)”. Further, the direction perpendicular to the axial direction is referred to as the “axis perpendicular direction”. As shown in FIG. 2, when the pump 1 of the present embodiment is used, the axial direction is the vertical direction, the axial first side O1 is the vertical lower side, and the axial second side O2 is the vertical upper side. And the direction perpendicular to the axis is horizontal.
Further, in the present specification, unless otherwise specified, the “circumferential direction” refers to a circumferential direction centered on the central axis O of the pump 1, and the “inner circumferential side” refers to the central axis O of the pump 1. It refers to the near side, and the “outer peripheral side” refers to the side far from the central axis O of the pump 1.

The motor shaft 22 extends from the inside of the motor casing 21 to the first side O1 in the axial direction. Therefore, the axial first side O1 of the motor 2 is the load side of the motor 2, and the axial second side O2 of the motor 2 is the anti-load side of the motor 2.
As shown in FIG. 4, in the present embodiment, the motor casing 21 is configured as a cup type in which the end surface of the first axial direction side O1 is open. That is, the motor casing 21 has an end wall (anti-load side bracket) that closes the end surface of the axial second side O2, but has an end wall (load side bracket) that closes the end surface of the axial first side O1. Absent.

<Pump body 3>
Next, the pump body 3 will be described mainly with reference to FIGS.
As shown in FIG. 2, the pump body 3 is located on the first side O1 in the axial direction with respect to the motor casing 21 of the motor 2. The pump body 3 has one or a plurality of impellers 32 that are rotated by the rotation of the motor shaft 22 (and thus the rotation shaft 11), a suction port 31i, and a discharge port 31o. A pump casing 31 that divides the flow path P up to 31o and accommodates the one or more impellers 32 in the flow path P is provided.
In the example of the drawing, in the flow path P, a plurality of (more specifically, four) impellers 32 are arranged in the axial direction. Further, the central axis C31i of the suction port 31i extends in the axial direction and also coincides with the central axis O of the pump 1. The central axis C31o of the discharge port 31o extends in the direction perpendicular to the axis.
In the present embodiment, the motor shaft 22 extends to the impeller 32 on the most axial first side O1, and at the end of the impeller 32 on the most axial first side O1 at the axial first side O1. , The nut N and the washer W are fixed. Each impeller 32 is fixed to the rotating shaft 11 (specifically, the motor shaft 22).

  In the illustrated example, the pump casing 31 is composed of a plurality (five in the illustrated example) of partial casings 311 to 313 that are stacked in the axial direction. Specifically, these partial casings 311 to 313 have a suction port 31i and are arranged on the most axial first side O1 and a suction casing 311 that has a discharge port 31o and are arranged on the most axial second side O2. And a plurality of (three in the illustrated example) intermediate casings 313 arranged between the suction casing 311 and the discharge casing 312. Each of the partial casings 311 to 313 is composed of one part.

In the illustrated example, one impeller 32 is housed in each of the suction casing 311 and each intermediate casing 313. As shown in an enlarged manner in FIG. 3, each impeller 32 is located on the outer peripheral side of the tubular boss 32b fixed to the rotating shaft 11 and the boss 32b, and extends to the axial second side O2. A first shroud 3231 that extends to the outer peripheral side after existing, and a second shroud 3232 that is located on the second side O2 in the axial direction with respect to the first shroud 3231 and that extends from the boss 32b to the outer peripheral side. And a plurality of blades 3233 arranged substantially radially between the first shroud 3231 and the second shroud 3232. The bosses 32b of each impeller 32 are laminated in the axial direction. The inlet 32i of each impeller 32 is defined by the ends of the boss 32b and the first shroud 3231 on the first axial side O1 and faces the first axial side O1. The outlet 32o of each impeller 32 is partitioned by the outer peripheral ends of the first shroud 3231 and the second shroud 3232, faces the outer peripheral side, and is located on the outer peripheral side of the inlet 32i of the impeller 32. ing.
Further, among the impellers 32, which are located on the axially first side O1 of the intermediate casing 313 that is closest to the discharge casing 312, the bosses 32b of the impellers 32b are more axial than the outlets 32o. It has an extension part 32s extending to the second side. The boss 32b of the impeller 32 arranged in the intermediate casing 313 closest to the discharge casing 312 does not have the extending portion 32s.
The suction casing 312 is provided with a strainer 33 for suppressing foreign matter (dust, etc.) in the liquid F in the tank T from entering the flow path P.

The suction casing 311 and each of the intermediate casings 313 respectively have outer peripheral wall portions 311wo and 313wo that form a part of the outer peripheral wall 31wo of the pump casing 31. The outer peripheral wall portions 311wo and 313wo of the suction casing 311 and the respective intermediate casings 313 are laminated in the axial direction.
Further, each of the intermediate casings 313 has a guide portion 313g configured to guide the fluid between the pair of impellers 32 adjacent to each other. Each of the guide portions 313g is located on the axially second side O2 with respect to the first shroud 3131 and the first shroud 3131 extending substantially in the perpendicular direction, and the second shroud 3132 extending substantially in the perpendicular direction. And a plurality of guide vanes 3133 arranged substantially radially between the first shroud 3131 and the second shroud 3132. The first shroud 3131 and the guide vane 3133 are located in the partial casings 313 and 311 (the intermediate casing 313 or the suction casing 311) that are adjacent to the first casing O1 having the above components on the first side O1 in the axial direction. The inner peripheral end of the first shroud 3131 closely opposes (both contact or non-contact) the outer peripheral surface of the extending portion 32s of the impeller 32 that is adjacent to the first shroud 3131 on the first side O1 in the axial direction. The outer peripheral end of the first shroud 3131 is different from the outer peripheral wall portions 313wo and 311wo of the partial casings 313 and 311 that are adjacent to the intermediate casing 313 having the first shroud 3131 on the axially first side O1. , Are opposed to each other in the direction perpendicular to the axis. The inner peripheral end of the second shroud 3132 is between the outer peripheral surface of the end of the first shroud 3231 of the impeller 32 housed in the intermediate casing 313 having the second shroud 3132 on the axial first side O1 side, The liner ring 53 is sandwiched, and the outer peripheral end of the second shroud 3132 is connected to the end of the outer peripheral wall portion 313wo of the intermediate casing 313 having the second shroud 3132 on the axial first side O1.
The inlet 313gi of each guide portion 313g is partitioned by the outer peripheral end of the first shroud 3131 and the outer peripheral wall portions 313wo and 311wo of the partial casings 313 and 311 that are spaced apart and opposed to the outer peripheral end of the first shroud 3131. Facing. The outlet 313go of each guide portion 313g is defined by the inner peripheral ends of the first shroud 3131 and the second shroud 3132, faces the inner peripheral side, and is located on the inner peripheral side of the inlet 313gi of the guide portion 313g. is doing.

As shown in FIGS. 2 to 4, the discharge casing 312 includes an outer peripheral wall portion 312 wo that constitutes a part of the outer peripheral wall 31 wo of the pump casing 31, and a periphery of the rotary shaft 11 on the inner peripheral side of the outer peripheral wall portion 312 wo. An annular inner peripheral wall portion 312wi, a tubular discharge pipe portion 312d located on the outer peripheral side of the central axis O of the pump 1, a first partition wall 312a, and a second partition wall 312b. Have
The discharge pipe portion 312d extends to the second side O2 in the axial direction and then defines a discharge flow path DP that extends from the outer peripheral side to the discharge port 31o. The end of the discharge pipe portion 312d that defines the discharge port 31o is located outside the tank T on the wall surface of the tank T on the second side O2 in the axial direction. Of the discharge pipe portion 312d, the wall portion on the outer peripheral side (the side farther from the central axis O of the pump 1) constitutes a part of the outer peripheral wall portion 312wo of the discharge casing 312. An inner peripheral wall portion (a side closer to the central axis O of the pump 1) of the discharge pipe portion 312d is continuous from the inner peripheral wall portion 312wi of the discharge casing 312 to the second axial direction side O2.

The inner peripheral wall portion 312wi is located on the axial second side O2 with respect to the impeller 32 on the axial second side O2.
The discharge casing 312 extends in the circumferential direction between the outer peripheral wall portion 312wo and the inner peripheral wall portion 312wi on the first side O1 in the axial direction with respect to the discharge pipe portion 312d (and thus the discharge flow passage DP). Is partitioned. The axial first side O1 of the circulation flow path CP is open, so that the liquid flowing out from the outlet 32o of the impeller 32 on the most axial second side O2 is circularly flown from an arbitrary circumferential position. It is designed so that it can flow into the road CP. The discharge flow path DP is continuous from a part of the circulation flow path CP in the circumferential direction to the second axial direction side O2. In the illustrated example, a part of the inner peripheral wall portion 312wi is located closer to the first axial direction side O1 than the end of the outer peripheral wall portion 312wo on the first axial direction side O1 and is adjacent to the discharge casing 312. It faces the outer peripheral wall portion 313wo of 313 at a distance in the axial direction. Thereby, a part of the circulation flow path CP is also partitioned by the outer peripheral wall portion 313wo of the intermediate casing 313 adjacent to the discharge casing 312.

  The discharge casing 312 extends between the inner peripheral wall portion 312wi and the outer peripheral wall portion 312wo in the circumferential direction from the end portion on one side in the circumferential direction of the discharge pipe portion 312d to the end portion on the other side in the circumferential direction of the discharge pipe portion 312d. It has the extending 1st partition wall 312a. Further, the discharge casing 312 divides the space C around the rotary shaft 11 at the axial second side O2 with respect to the first partition wall 312a and at the position overlapping the discharge pipe portion 312d in the axial direction. There is. The first partition wall 312a defines the circulating flow path CP by the surface of the first side O1 in the axial direction, and defines the space C in the discharge casing 312 by the surface of the second side in the axial direction. . Although illustration is omitted, the first partition wall 312a gradually extends in the circumferential direction from the end portion on one side in the circumferential direction of the discharge pipe portion 312d toward the end portion on the other side in the circumferential direction of the discharge pipe portion 312d. To the second side O2 in the axial direction, whereby the liquid that has entered the circulation channel CP from a circumferential position different from the discharge channel DP smoothly moves along the first partition wall 312a. It is designed to flow into the discharge flow path DP.

  The space C is located on the second side O2 in the axial direction with respect to the first partition wall 312a, in the outer peripheral wall portion 312wo, except for the portion forming the discharge pipe portion 312d, and on the inner peripheral wall of the discharge pipe portion 312d. It is partitioned with the section. The rotary shaft 11 is located in the space C. Further, the space C is axially divided by a second partition wall 312b located on the second axial direction side O2 with respect to the first partition wall 312a, and the space C is more divided than the second partition wall 312b. A portion of the axial first side O1 is the first space C1, and a portion of the space C on the axial second side O2 of the second partition wall 312b is a second space C2. In the first space C1, between the first partition wall 312a and the second partition wall 312b in the axial direction, of the outer peripheral wall portion 312wo, a portion other than the portion forming the discharge pipe portion 312d and the discharge pipe portion 312d. It is partitioned from the inner peripheral wall portion. The second space C2 is located on the second side O2 in the axial direction with respect to the second partition wall 312b, in the outer peripheral wall portion 312wo except for the portion constituting the discharge pipe portion 312d, and in the inner peripheral side of the discharge pipe portion 312d. It is partitioned with the wall of the. Of the discharge casing 312, a portion that defines the second space C2 (the second partition wall 312b, the second side O2 in the axial direction with respect to the second partition wall 312b, constitutes the discharge pipe portion 312d of the outer peripheral wall portion 312wo. A portion other than the portion and the wall portion on the inner peripheral side of the discharge pipe portion 312d on the axial second side O2 with respect to the second partition wall 312b) is a cup whose end surface on the axial second side O2 is open. The second space C2 is open to the axial second side O2.

  The 2nd partition wall 312b is comprised by the cyclic | annular form, and the rotating shaft 11 is penetrated by the center hole. The second partition wall 312b extends to the outer peripheral side of the outer peripheral wall portion 312wo of the discharge casing 312, and in use, the extended portion is outside the tank T in the axial direction of the tank T. It is arranged on the wall surface on the second side O2. As a result, when used, the first space C1 is arranged inside the tank T, and the second space C2 is arranged outside the tank T. The outer peripheral wall portion 312wo of the discharge casing 312 has a window 59 penetrating in the direction perpendicular to the axis in a portion that defines the first space C1. When in use, the liquid level of the liquid F in the tank T is positioned closer to the axial first side O1 than the end 59a of the window 59 on the axial first side O1.

As shown in FIG. 3, a tubular discharge bush 55 fixed to the inner peripheral wall portion 312wi and extending in the axial direction is provided between the inner peripheral wall portion 312wi and the rotary shaft 11. A tubular shaft sleeve 54, which is fixed to the rotating shaft 11 and extends in the axial direction, is provided on the inner peripheral side of the discharge bush 55. In this example, the discharge bush 55 and the shaft sleeve 54 constitute a non-contact type shaft seal portion 60 for suppressing the liquid in the flow path P from leaking to the first space C1 side. In this example, the shaft seal portion 60 has a slight gap G between the discharge bush 55 and the shaft sleeve 54, and the liquid in the flow path P passes through the gap G and the first space C1. It is configured to allow a small amount of leakage to the side. The liquid that has leaked into the first space C1 can return to the inside of the tank T through the window 59.
Thus, configuring the shaft sealing portion 60 to be a non-contact type having the gap G is particularly suitable when the pump 1 is a coolant pump as in this example. When the pump 1 is a coolant pump, the liquid F in the tank T often contains foreign matter such as chips. Therefore, if the shaft seal portion 60 is configured as a contact type such as a mechanical seal, foreign matter may enter the shaft seal portion 60 to lose the shaft seal function, and the shaft seal portion 60 may be frequently replaced. When the pump 1 sucks in air, air may accumulate near the outlet 32o of the impeller 32 or in the shaft sealing portion 60, and the discharge performance and the shaft sealing function may deteriorate. Therefore, these problems can be avoided by configuring the shaft sealing portion 60 to be a non-contact type having the gap G as in this example. Further, even if air or liquid enters the shaft sealing portion 60 from the flow path P, the air or liquid can escape to the first space C1 side through the gap G of the shaft sealing portion 60. There is no fear that the sealing function will deteriorate.
The discharge bush 55 may be formed integrally with the inner peripheral wall portion 312wi of the discharge casing 312, in other words, may form a part of the inner peripheral wall portion 312wi of the discharge casing 312. In this case, the shaft sealing portion 60 is composed of the inner peripheral wall portion 312wi and the shaft sleeve 54, and has a gap G between the inner peripheral wall portion 312wi and the shaft sleeve 54.
In the example of FIG. 3, on the axial second side O2 of the discharge bush 55, the inner peripheral wall portion 312wi has an annular protruding portion 312wip protruding toward the inner peripheral side, and the annular protruding portion 312wip and the shaft sleeve. 54 closely oppose each other. The gap between the annular protrusion 312wip and the shaft sleeve 54 is wider than the gap G of the shaft sealing portion 60 and does not have a shaft sealing function. Due to the presence of the annular protrusion 312wip, when the pump 1 is assembled, the rotating shaft 11 is passed through the central hole of the annular protrusion 312wip, so that the rotating shaft 11 and the discharge casing 312 can be easily assembled. Has been

  In the example of the figure, an annular first water drain collar 57 and a second water drain collar 58, which are fixed to the rotary shaft 11 and extend in the axial direction, are provided in the first space C1. . The second drainage collar 58 is spaced apart from the first drainage collar 57 on the axial second side O2. A tubular collar 56, which is fixed to the rotating shaft 11 and extends in the axial direction, is provided between the first drainage collar 57 and the second drainage collar 58. As a result, the liquid blown out to the axial second side O2 through the shaft sealing portion 60 and the liquid bounced back in the first space C1 collide with the first water cutting collar 57 and the second water cutting collar 58, It is possible to suppress the movement toward the second side O2 in the axial direction more than those.

  The discharge casing 312 has an open end surface on the second side O2 in the axial direction in a portion that defines the space C (more specifically, the second space C2). In other words, the space C (more specifically, the second space C2) is open at its axial second side O2. The second space C2 is located at a position that overlaps the discharge flow path DP and the discharge port 31o in the direction perpendicular to the axis. It should be noted that the phrase "they are located at overlapping positions in the direction perpendicular to the axis" means that they are at the same axial direction position in at least a part.

In the pump 1 configured as described above, when each impeller 32 is rotated by the rotation of the motor shaft 22 (and thus the rotation shaft 11) of the motor 2, as shown by the arrow in FIG. F is sucked into the flow path P of the pump 1 from the suction port 31i, and this liquid F flows into the inlet 32i of the impeller 32 on the most axial first side O1 and moves inside the impeller 32 to the outer peripheral side. Meanwhile, the pressure is increased by the action of centrifugal force. Then, the liquid exits from the outlet 32o of the impeller 32 and is guided by the outer peripheral wall 31wo of the pump casing 31 to be redirected to the axial second side O2, and then to the axial second side O2. It flows into an inlet 313gi of a certain guide portion 313g. After that, the liquid is guided to the inner peripheral side by the guide portion 313g, then exits from the outlet 313go of the guide portion 313g, and is directed to the axial second side O2 by the extending portion 32s of the impeller 32 that faces the outlet. After the direction is changed, it flows into the inlet 32i of the impeller 32 adjacent to the axial second side O2, and the pressure is increased again. This boosting operation is repeatedly performed up to the impeller 32 on the most second axial side O2. Then, the liquid discharged from the outlet 32o of the impeller 32 on the most axial second side O2 passes through the discharge passage DP through the circulation passage CP located on the axial second side O2, and then the discharge port. It is discharged from 31o to the outside.
On the other hand, a part of the liquid in the flow path P leaks into the first space C1 through the gap of the shaft sealing portion 60. When the liquid level of the liquid in the first space C1 reaches the end 59a of the window 59 on the first side O1 in the axial direction, the liquid flows out from the window 59 to the outside of the pump 1 and returns into the tank T.

It is not essential that one impeller 32 be housed in each of the suction casing 311 and each intermediate casing 313.
For example, the impeller 32 may be housed only in the suction casing 311 and the impeller 32 may not be housed in the intermediate casing 313. In this case, the pump 1 has only one impeller 32. In this case, if the intermediate casing 313 adjacent to the suction casing 311 has the guide portion 313g at a position adjacent to the second side O2 in the axial direction with respect to the impeller 32, the efficiency of the pump 1 is improved. Is preferred. Further, in this case, when another intermediate casing 313 is provided between the intermediate casing 313 adjacent to the suction casing 311 and the discharge casing 312, the other intermediate casing 313 does not have the guide portion 313g. (Having only the peripheral wall portion 313wo) is preferable from the viewpoint of improving the efficiency of the pump 1.
Alternatively, the impeller 32 is housed only in each of the suction casing 311 and a part (one or more) of the intermediate casings 313 located on the most axial first side O1 among the plurality of intermediate casings 313. You may do it. In this case, it is preferable that the intermediate casing 313 has the guide portion 313g at least between the impellers 32 from the viewpoint of improving the efficiency of the pump 1.

  Further, the configuration of the impeller 32 and the configuration of the pump casing 31 may be different from those described above and illustrated.

<Connecting member 4>
Next, the connecting member 4 will be described mainly with reference to FIGS. 4 to 7.
FIG. 5 is a perspective view showing a part of the pump 1 of FIG. FIG. 6 is a perspective view showing the pump 1 of FIG. 5 with the motor casing 21 and the motor shaft 22 removed. FIG. 7 is an exploded perspective view showing the pump 1 of FIG. 5 in a disassembled state. In FIG. 7, illustration of a part of the motor shaft 22 and a seal member 52 described later is omitted.
As shown in FIGS. 4 to 7, the connecting member 4 is a plate-shaped component configured in an annular shape (in the illustrated example, a substantially annular shape). The connecting member 4 is arranged between the motor casing 21 and the pump casing 31 in the axial direction. The rotary shaft 11 is inserted through the central hole 44 of the connecting member 4.
As shown in FIGS. 4 to 7, the motor casing 21 has one or a plurality of fastening holes 21h (hereinafter, referred to as “motor side fastening holes 21h”) at the end of the first axial direction side O1. is doing. On the other hand, the connecting member 4 has one or a plurality of fastening holes 41h (hereinafter, referred to as "first fastening holes 41h") at positions corresponding to the motor side fastening holes 21h. In the example of the drawing, a plurality (specifically, four) of motor-side fastening holes 21h and a plurality (specifically, four) of first fastening holes 41h are arranged along the circumferential direction. Has been done. The connecting member 4 is bolted to the motor casing 21 by the bolt B1 via the motor side fastening hole 21h and the first fastening hole 41h. In the example of the drawing, the motor-side fastening hole 21h and the first fastening hole 41h extend in the axial direction, and the first fastening hole 41h continues from the motor-side fastening hole 21h to the axial first side O1. The motor-side fastening hole 21h and the first fastening hole 41h are formed so that the bolt B1 is inserted from the axial second side O2. However, the invention is not limited to the example shown in the figure, and the motor side fastening hole 21h and the first fastening hole 41h may extend in any direction, and the bolt B1 is formed so as to be inserted in any direction. Good.
Further, the pump casing 31 (specifically, the discharge casing 312) is provided at one end on the axial second side O2 of the part that divides the space C (more specifically, the second space C2). Alternatively, it has a plurality of fastening holes 31h (hereinafter referred to as "pump side fastening holes 31h"). On the other hand, the connecting member 4 has one or a plurality of fastening holes 42h (hereinafter, referred to as "second fastening holes 42h") at positions corresponding to the pump-side fastening holes 31h. In the illustrated example, a plurality (specifically, four) of pump-side fastening holes 31h and a plurality (specifically, four) of second fastening holes 42h are arranged along the circumferential direction. There is. The connecting member 4 is bolted to the pump casing 31 by the bolt B2 via the pump-side fastening hole 31h and the second fastening hole 42h. In the example of the drawing, the pump-side fastening hole 31h and the second fastening hole 42h extend in the axial direction, and the second fastening hole 42h continues from the pump-side fastening hole 31h to the axial second side O2. The pump-side fastening hole 31h and the second fastening hole 42h are formed so that the bolt B2 is inserted from the axial second side O2. However, the pump-side fastening hole 31h and the second fastening hole 42h are not limited to the illustrated example, and may extend in any direction, and the bolt B2 may be formed so as to be inserted in any direction. Good.
As shown in FIG. 7, the first fastening hole 41h and the second fastening hole 42h in the connecting member 4 are viewed in plan view of the connecting member 4 (that is, the connecting member 4 is viewed from either side in the axial direction). When), they are arranged at different positions.

As described above, in the present embodiment, the coupling member 4 is bolted to the motor casing 21 via the first fastening hole 41h and bolted to the pump casing 31 via the second fastening hole 42h. Therefore, the motor casing 21 and the pump casing 31 are not directly bolted, but are connected via the connecting member 4.
Here, in the conventional pump, as described above, the motor casing and the pump casing are connected by bolt fastening. In the motor casing, the position, orientation, size, etc. of the bolt fastening holes may differ depending on the type of motor (manufacturer, output, country of use, etc.). Therefore, for example, when connecting a plurality of different types of motors to the same type of pump main body, it may be necessary to prepare a dedicated pump casing for each type of motor, resulting in a great deal of cost and effort. It was hanging. On the contrary, in the pump casing, the position, direction, size, etc. of the bolt fastening holes may differ depending on the type of pump body. Therefore, for example, when trying to connect a plurality of different types of pump main bodies to the same type of motor, it may be necessary to prepare a dedicated motor casing for each type of pump main body. Was hanging.
In this respect, in the present embodiment, for example, when a plurality of different types of motors 2 are to be connected to the same type of pump body 3, the motor side fastening hole 21h of the motor casing 21 that may be different for each type of the motor 2 is used. Without changing the configuration of the pump casing 31 of the pump body 3 by changing the position, orientation, size, etc. of the first fastening hole 41h of the connecting member 4 so as to match the position, orientation, size, etc. It is possible to connect the pump casing 31 and the motor casing 21 without having to prepare a dedicated pump casing 31 for each type of the motor 2. In this case, it is necessary to prepare a dedicated connecting member 4 for each type of the motor 2, but since the connecting member 4 has a much smaller and simpler structure than the pump casing 31, a dedicated pump for each type of the motor 2 is provided. Compared with the case where the casing 31 is prepared, the cost and labor can be significantly reduced. Therefore, according to the present embodiment, it is possible to easily realize the connection of the motor casings 21 of the plurality of different types of motors 2 to the pump casing 31 having the same configuration, and it is possible to reduce the cost and the labor. become.
Similarly, in this embodiment, for example, when a plurality of different types of pump main bodies 3 are to be connected to the same type of motor 2, the fastening holes 31h of the pump casing 31 that may be different for each type of the pump main body 3 are formed. Without changing the motor casing 21 of the motor 2 (that is, the pump main body 3), only the position, orientation, size, etc. of the second fastening hole 42h of the connecting member 4 are changed so as to match the position, orientation, size, etc. It is possible to connect the pump casing 31 and the motor casing 21 without having to prepare a dedicated motor casing 21 for each type. In this case, it is necessary to prepare a dedicated connecting member 4 for each type of pump body 3, but since the connecting member 4 is much smaller and simpler than the motor casing 21, it is dedicated for each type of pump body 3. Compared with the case where the motor casing 21 is prepared, the cost and labor can be significantly reduced. Therefore, connecting the pump casings 31 of the pump main bodies 3 of different types to the motor casing 21 having the same configuration can be easily realized, and the cost and the labor can be reduced.

  Further, in the present embodiment, the configurations of the first fastening hole 41h and the second fastening hole 42h of the connecting member 4 may be adjusted according to the motor side fastening hole 21h of the motor casing 21 and the pump side fastening hole 31h of the pump casing 31. Therefore, the motor-side fastening hole 21h and the pump-side fastening hole 31h do not need to be specially changed in configuration, and the conventional configuration can be used. Therefore, the connecting member 4 of the pump 1 of the present embodiment is highly versatile and can be used for many conventional motor casings and pump casings.

As shown in FIG. 4, in the present embodiment, the motor casing 21 does not have the end wall (load-side bracket) of the axial first side O1 as described above, but does not have the axial first side O1. The end face is open. The connecting member 4 closes the open end surface of the first axial direction side O1 of the motor casing 21 and has a function as a load side bracket of the motor casing 21.
As a result, the height of the pump 1 in the axial direction can be reduced as compared with the case where the motor casing 21 has an end wall (load side bracket) on the axial first side O1 separately from the connecting member 4. The size of the pump 1 can be reduced.

As shown in FIGS. 4 and 7, in the present embodiment, the pump 1 further includes a bearing 50 that rotatably supports the motor shaft 22. The connecting member 4 has a bearing housing recess 45 that houses the bearing 50. In the illustrated example, the bearing accommodating recess 45 is configured to extend annularly in the circumferential direction, and specifically, the side surface 45a extending in the axial direction and facing the inner circumferential side, and the axial direction in the perpendicular direction. It is partitioned by the upper surface 45b that extends and faces the second side O2 in the axial direction. The bearing 50 is in contact with the side surface 45a of the bearing accommodating recess 45, and is supported by the upper surface 45b of the bearing accommodating recess 45 from the first axial direction side O1.
Since the motor shaft 22 (and thus the rotary shaft 11) is rotatably supported by the bearing 50, it is possible to prevent the motor shaft 22 from tilting with respect to the pump casing 31.

As shown in FIGS. 4 and 7, the bearing accommodation recess 45 is open at the axial second side O2. Then, in a state where the bearing 5 is accommodated in the bearing accommodating recess 45, a portion of the bearing 5 on the outer peripheral side and a portion of the connecting member 4 adjacent to the bearing accommodating recess 45 on the outer peripheral side include the second axial direction. It is covered with a plate-shaped cover 51 from the side O2. The cover 51 is formed in an annular shape, and the motor shaft 22 is inserted into a center hole of the cover 51.
The cover 51 has one or a plurality of fastening holes 51h (hereinafter referred to as "cover-side fastening holes 51h"). The connecting member 4 has one or more fastening holes 43h (hereinafter, referred to as "third fastening holes 43h") at a position corresponding to the cover-side fastening hole 51h in a portion adjacent to the bearing housing recess 45 on the outer peripheral side. )have. In the illustrated example, a plurality (specifically, three) of cover-side fastening holes 51h and a plurality (specifically, three) of third fastening holes 43h are arranged along the circumferential direction. There is. The connecting member 4 is bolted to the cover 51 with the bolt B3 via the cover-side fastening hole 51h and the third fastening hole 43h. In the example of the drawing, the cover-side fastening hole 51h and the third fastening hole 43h extend in the axial direction, and the third fastening hole 43h continues from the cover-side fastening hole 51h to the axial first side O1. The cover side fastening hole 51h and the third fastening hole 43h are formed so that the bolt B3 is inserted from the axial second side O2.
Further, as shown in FIG. 4, on the inner peripheral side of the cover 51, the motor shaft 22 has an annular protruding portion 22a that protrudes toward the outer peripheral side. The inner peripheral portion of the bearing 50 is covered with the annular protrusion 22a of the motor shaft 22 from the second axial direction side O2.
The cover 51 and the annular protrusion 22a of the motor shaft 22 restrict the movement of the bearing 50 toward the second axial direction side O2. Thereby, for example, when the pump 1 is moved or tilted during installation, the bearing 50 can be prevented from coming out of the bearing accommodating recess 45 of the coupling member 4.

As shown in FIG. 4, in the present embodiment, the pump 1 includes a seal member 52 that fluid-tightly seals between the coupling member 4 and the motor shaft 22 on the axially first side O1 with respect to the bearing 50. , Is further equipped. In this example, the seal member 52 is configured as an oil seal. The connecting member 4 has a seal accommodating recess 46 that accommodates the seal member 52 on the first side O1 in the axial direction with respect to the bearing accommodating recess 45. As shown in FIGS. 4 and 7, the seal accommodating recess 46 is configured to extend annularly in the circumferential direction, and specifically, includes a side surface 46a extending in the axial direction and facing the inner circumferential side. , The upper surface 46b that extends in the direction perpendicular to the axis and faces the second axial direction side O2. The seal member 52 is in contact with the side surface 46a of the seal accommodating recess 46, and is supported from the axial first side O1 by the upper surface 46b of the seal accommodating recess 46. The inner peripheral end of the seal member 52 is in contact with the motor shaft 22.
Due to the presence of the seal member 52, for example, dust, steam, moisture, etc. on the first axial direction side O1 of the seal member 52 are directed to the second axial direction side O2 of the seal member 52 (bearing 50 and motor 2 side). You can prevent intrusion.

As shown in FIG. 4, in this example, a part of the connecting member 4 is inside the space C (more specifically, the second space C2) of the pump casing 31 (more specifically, the discharge casing 312). Is located in. More specifically, at least a part (only a part in the example of the drawing) of the bearing housing recess 45 of the connecting member 4 is located in the space C (second space C2). Along with this, at least a part (only a part in the example of the drawing) of the bearing 50 is located in the space C (second space C2). Further, all of the seal accommodating recess 46 of the connecting member 4 and the seal member 52 are located in the space C (second space C2).
As a result, if the bearing housing recess 45 and the bearing 50 are entirely in the axial direction second more than the space C (more specifically, the second space C2) of the pump casing 31 (more specifically, the discharge casing 512). Compared with the case where the pump 1 is located on the side O2, the height of the pump 1 in the axial direction can be reduced, and the pump 1 can be downsized.

Further, in the example of the drawing, a part of the connecting member 4 is located at a position overlapping the flow path P of the pump casing 31 in the direction perpendicular to the axis. More specifically, at least a part (only a part in the example of the drawing) of the bearing accommodating concave portion 45 of the connecting member 4 is in the direction perpendicular to the axis with respect to the flow path P (the discharge flow path DP in the example of the drawing). It is in the overlapping position. Along with this, at least a part (only a part in the example of the drawing) of the bearing 50 is at a position overlapping the flow path P (the discharge flow path DP in the example of the drawing) in the direction perpendicular to the axis. Further, all of the seal accommodating recess 46 of the connecting member 4 and the seal member 52 are at positions overlapping the flow path P (in the example of the drawing, the discharge flow path DP) in the axis perpendicular direction.
As a result, the height of the pump 1 in the axial direction can be reduced as compared with the case where all of the connecting member 4 and the bearing 50 are located on the axially second side O2 with respect to the flow path P of the pump casing 31. The size of the pump 1 can be reduced.

As shown in FIG. 4, the coupling member 4 is configured to engage with a first engaged portion 21e provided at an end portion of the motor casing 21 on the first axial side O1. It has the part 41e. The first engaging portion 41e of the connecting member 4 engages with the first engaged portion 21e of the motor casing 21 so that the motor casing 21 can be positioned with respect to the connecting member 4 in the axial direction and the axial direction. More specifically, it is configured to regulate the relative displacement of the motor casing 21 in the axial direction with respect to the connecting member 4 and the relative displacement to the first axial direction side O1. In the illustrated example, the first engaged portion 21e of the motor casing 21 includes a side surface 21ea extending in the axial direction and facing the inner peripheral side, and a lower surface 21eb extending in the axial direction and facing the axial first side O1. And have. On the other hand, the first engaging portion 41e of the connecting member 4 extends in the axial direction and extends toward the outer peripheral side, and extends in the direction perpendicular to the side surface 41ea that contacts the side surface 21ea of the first engaged portion 21e. And has an upper surface 41eb that faces the second side O2 in the axial direction and contacts the lower surface 21eb of the first engaged portion 21e. However, the configurations of the first engaged portion 21e and the first engaging portion 41e may be different from this example.
Since the connecting member 4 has the first engaging portion 41e, when the motor casing 21 is assembled to the connecting member 4 on the axial second side O2 during assembly of the pump 1, the motor casing 21 is connected to the connecting member 4. Since it is easier to position the motor-side fastening hole 21h of the motor casing 21 at a position corresponding to the first fastening hole 41h of the coupling member 4, the motor casing 21 and the coupling member 4 are bolted together. Work can be performed stably.
Further, the connecting member 4 has a second engaging portion 42e configured to engage with a second engaged portion 31e provided at the end of the pump casing 31 on the second axial side O2. is doing. The second engaging portion 42e of the connecting member 4 engages with the second engaged portion 31e of the pump casing 31 so that the connecting member 4 can be positioned with respect to the pump casing 31 in the axial direction and the axial direction. More specifically, the relative displacement of the pump casing 31 in the direction perpendicular to the axis with respect to the connecting member 4 and the relative displacement to the axial second side O2 are restricted. In the illustrated example, the second engaged portion 31e of the pump casing 31 includes a side surface 31ea extending in the axial direction and facing the inner peripheral side, and an upper surface 31eb extending in the axial direction and facing the axial second side O2. And have. On the other hand, the second engagement portion 42e of the connecting member 4 extends in the axial direction and faces the outer peripheral side, and extends in the axial direction with the side surface 42ea that contacts the side surface 31ea of the second engaged portion 31e. And a lower surface 42eb that faces the second side O2 in the axial direction and contacts the upper surface 31eb of the second engaged portion 31e. However, the configurations of the second engaged portion 31e and the second engaging portion 42e may be different from this example.
Since the connecting member 4 has the second engaging portion 42e, when the connecting member 4 is assembled to the pump casing 31 on the axial second side O2 during assembly of the pump 1, the connecting member 4 is attached to the pump casing 31. Since it is easier to position the second fastening hole 42h of the connecting member 4 at a position corresponding to the pump-side fastening hole 31h of the pump casing 31, bolting of the connecting member 4 and the pump casing 31 is facilitated. Work can be performed stably.

In this embodiment, the connecting member 4 preferably has an axial thickness 4T (FIG. 4) of 55 mm or less. By making the connecting member 4 thin in this way, the height of the pump 1 in the axial direction can be reduced, and the pump 1 can be downsized.
In addition, in the present embodiment, the thickness 4T of the connecting member 4 in the axial direction is preferably 40 mm or more, and more preferably 45 mm or more. As a result, a sufficient thickness can be secured for the connecting member 4 to have the bearing accommodation recess 45 and the seal accommodation recess 46 in addition to the first fastening hole 41h and the second fastening hole 42h.

[Second Embodiment]
Next, the pump 1 according to the second embodiment of the present invention will be described with reference to FIGS. 8 to 12, focusing on the points different from the first embodiment. 8 and 9 are drawings corresponding to FIGS. 2 and 4 showing the first embodiment, respectively. 10 to 12 are drawings corresponding to FIGS. 5 to 7 showing the first embodiment, respectively.
As shown in FIG. 8, in the second embodiment, the pump 1 includes a pump shaft 34 arranged on the first side O1 in the axial direction with respect to the motor shaft 22, and a cup connecting the motor shaft 22 and the pump shaft 34. And a ring 70. The pump shaft 34 is rotated by the rotation of the motor shaft 22. The rotary shaft 11 of the pump 1 is composed of a motor shaft 22 and a pump shaft 34.
The pump shaft 34 extends to the impeller 32 on the most axial first side O1, and at the end of the impeller 32 on the most axial first side O1 on the axial first side O1, a nut N and a washer are provided. It is fixed by W. Each impeller 32 is fixed to the rotating shaft 11 (specifically, the pump shaft 34).
The configuration of the pump body 3 may be the same as that described in the first embodiment.

As shown in an enlarged manner in FIG. 9, in the present embodiment, the connecting member 4 is bolted to the motor casing 21 via the first fastening hole 41h and the second fastening hole, as in the first embodiment. It is bolted to the pump casing 31 via 42h.
The connecting member 4 engages with the first engaged portion 21e provided in the motor casing 21 as in the first embodiment, thereby connecting the motor casing 21 in the axial direction and the axial direction. The first engaging portion 41e configured to be positioned with respect to the member 4 and the second engaged portion 31e provided in the pump casing 31 are engaged with each other, and thereby in the axial direction and the perpendicular direction. And a second engaging portion 42e configured to position the connecting member 4 with respect to the pump casing 31.

  Unlike the first embodiment, in the present embodiment, the motor casing 21 has an end wall (load side bracket) that closes the end surface of the first axial direction side O1. Therefore, the connecting member 4 does not have the function of the load side bracket in the motor casing 21. Accordingly, the pump 1 does not have the bearing 50, the seal member 52, and the cover 51. Further, the connecting member 4 does not have the bearing accommodating recess 45, the seal accommodating recess 46, and the third fastening hole 43h. Therefore, the connecting member 4 of the second embodiment can be made thinner than the connecting member 4 (FIG. 4) of the first embodiment.

In the present embodiment, the thickness 4T (FIG. 9) of the connecting member 4 in the axial direction is preferably 55 mm or less, more preferably 45 mm or less, and further preferably 38 mm or less. .. By making the connecting member 4 thin in this way, the height of the pump 1 in the axial direction can be reduced, the pump 1 can be downsized, and the structure of the connecting member 4 can be simplified to reduce the cost. Is possible.
Further, in the present embodiment, the thickness 4T of the connecting member 4 in the axial direction is preferably 10 mm or more, and more preferably 12 mm or more. As a result, the connecting member 4 can have a sufficient thickness and a sufficient strength to have the first fastening hole 41h and the second fastening hole 42h.

Here, in general, the length of the motor shaft of the motor may vary depending on the type of the motor. Therefore, according to the type of the motor 2, the axial thickness 4T of the connecting member 4 is adjusted, preferably within the above range, to adjust the axial thickness between the motor shaft 22 and the pump shaft 34 in the axial direction. It is possible to adjust the distance L (FIG. 9). The shorter the axial distance L between the motor shaft 22 and the pump shaft 34, the more the axial height of the pump 1 can be reduced, which is preferable because the pump 1 can be downsized.
From such a viewpoint, the motor shaft 22 and the pump shaft 34 are in contact with each other as shown in FIG. 9 (that is, the distance L is 0 mm), or are separated from each other in the axial direction. At the same time, it is preferable that the axial distance L between the two is 5 mm or less, and it is more preferable that the distance L is 2 mm or less.

As shown in FIG. 9, in the present example, the connecting member 4 is not located in the space C of the pump casing 31 (more specifically, the second space C2). On the other hand, in the space C of the pump casing 31 (more specifically, the second space C2), the end surface of the motor shaft 22 on the first axial side O1 and the end surface of the pump shaft 34 on the second axial side O2 are formed. Is located, and at least a part of the coupling 70 (only a part in the illustrated example) is also located in the space C (more specifically, the second space C2).
As a result, the entire coupling 70 is temporarily positioned on the axial second side O2 with respect to the space C (more specifically, the second space C2) of the pump casing 31 (more specifically, the discharge casing 512). The height of the pump 1 in the axial direction can be reduced as compared with the case where the pump 1 is operated, and the pump 1 can be downsized.

Further, in the example of the drawing, the coupling 70 is located at a position overlapping the coupling member 4 and the flow path P (the discharge flow path DP in the example of the drawing) in the direction perpendicular to the axis. Further, the end of the motor shaft 22 on the first axial side O1 is located on the first axial side O1 with respect to the connecting member 4.
As a result, if the entire coupling 70 is located on the second axial side O2 with respect to the connecting member 4, or if the entire coupling 70 overlaps the connecting member 4 in the axial direction. However, the height of the pump 1 in the axial direction can be reduced and the pump 1 can be downsized as compared with the case of being located on the second side O2 in the axial direction with respect to the flow path P.

Although the pump 1 according to the first and second embodiments of the present invention has been described above, the pump 1 according to the embodiment of the present invention can have various configurations different from the above-described configurations.
For example, the pump 1 may be configured as a pump used for any application other than the coolant pump.
Further, the pump 1 may be configured to pressurize and discharge an arbitrary liquid other than the coolant liquid or an arbitrary gas as the fluid F.
In addition, the pump 1 may be oriented such that, when in use, the axial direction is a direction other than the vertical direction (for example, the horizontal direction).
Further, the motor 2 and the pump body 3 can have any configuration. For example, the central axis C31i of the suction port and the central axis C31o of the discharge port of the pump casing 31 may extend in arbitrary directions.

  INDUSTRIAL APPLICABILITY The pump of the present invention can be applied to a pump used for any purpose, for example, can be suitably applied to a coolant pump.

DESCRIPTION OF SYMBOLS 1 pump 11 rotating shaft 2 motor 21 motor casing 21e first engaged portion 21ea side surface 21eb lower surface 21h fastening hole (motor side fastening hole)
22 Motor shaft (rotating shaft)
22a annular protrusion 3 pump body 31 pump casing 31e second engaged portion 31ea side surface 31eb upper surface 31h fastening hole (pump side fastening hole)
31i Suction port 31o Discharge port 31wo Outer peripheral wall 311 Partial casing (suction casing)
311wo Outer peripheral wall portion 312 Partial casing (discharging casing)
312a 1st partition wall 312b 2nd partition wall 312d Discharge pipe part 312wo Outer peripheral wall part 312wi Inner peripheral wall part 312wip Annular projection part 313 Partial casing (intermediate casing)
313g Guide 313gi Inlet 313go Outlet 3131 First shroud 3132 Second shroud 3133 Guide vane 32 Impeller 32i Inlet 32o Outlet 32s Extender 33 Strainer 34 Pump shaft (rotating shaft)
4 Connection member 4T Thickness 41h in the axial direction Fastening hole (first fastening hole)
42h Fastening hole (second fastening hole)
43h Fastening hole (third fastening hole)
44 center hole 45 bearing accommodation recess 45a side surface 45b upper surface 46 seal accommodation recess 46a side surface 46b upper surface 41e first engagement portion 41ea side surface 41eb upper surface 42e second engagement portion 42ea side surface 42eb lower surface 50 bearing 51 cover 51h fastening hole (cover side fastening) Hole)
52 seal member 53 liner ring 54 shaft sleeve 55 discharge bush 56 collars 57, 58 drainage collar 59 window 59a end of axial first side O1 60 shaft sealing portion 70 coupling O pump central axis O1 axial first side O2 axial line Direction Second side C31i Suction port central axis C31o Discharge port central axis C Space C1 First space C2 Second space B1 to B3 Bolt F Fluid (liquid)
P flow path DP discharge flow path CP circulating flow path G gap T tank N nut W washer

Claims (7)

A motor having a motor casing;
A pump body driven by the motor, having an impeller and a pump casing;
A connecting member that connects the motor casing and the pump casing together,
Equipped with
The impeller is rotated by rotation of the motor shaft of the motor,
The pump casing has a suction port and a discharge port, defines a flow path from the suction port to the discharge port, and accommodates the impeller in the flow path,
The connecting member has a first fastening hole and a second fastening hole, is bolted to the motor casing through the first fastening hole, and is bolted to the pump casing through the second fastening hole. Being a pump.   The pump according to claim 1, wherein the coupling member has a thickness in the axial direction of the pump of 55 mm or less. Further comprising a bearing that rotatably supports the motor shaft,
The impeller is fixed to the motor shaft,
The pump according to claim 1 or 2, wherein the connecting member has a housing recess that houses the bearing.   The pump according to claim 3, wherein the connecting member and the bearing are located at positions overlapping the flow path in a direction perpendicular to the axis of the pump. A pump shaft disposed on the first side in the axial direction of the pump with respect to the motor shaft;
A coupling that connects the motor shaft and the pump shaft,
Further equipped with,
The impeller is fixed to the pump shaft,
The motor shaft and the pump shaft are
Touching each other, or
The pump according to claim 1 or 2, which is separated from each other in the axial direction of the pump, and the axial distance between the two is 5 mm or less. The coupling is at a position overlapping in the axial direction of the pump with respect to each of the connecting member and the flow path,
The pump according to claim 5, wherein an end of the motor shaft on the first side in the axial direction is located on the first side in the axial direction with respect to the connecting member. The connecting member is
The motor casing is configured to engage with a first engaged portion provided in the motor casing, whereby the motor casing can be positioned with respect to the coupling member in the axial direction and the axial direction of the pump. A first engagement portion,
It is configured to engage with a second engaged portion provided in the pump casing, whereby the connecting member can be positioned with respect to the pump casing in the axial direction and the axis perpendicular direction. 2 engaging parts,
The pump according to any one of claims 1 to 6, further comprising: