JPH07301199A - Pump device - Google Patents

Abstract

PURPOSE:To reduce a contact surface of a pump part with a motor part to the minimum, restrict resonance phenomenon generated by this surface contact, and reduce generation of noise by providing a gap between a pump part side contact surface and a motor part side contact surface other than around an installation device. CONSTITUTION:A circular protrusion 30 is provided in a motor part abutting side surface of a pump case 12 at a part to match a female screw part 19a provided on a front wall 19, so a pump part 10 is applied to a motor part 11 only through the surface of this protrusion 30. By thus providing the protrusion 30 between a pump side contact surface and a motor side contact surface other than around an installation device such as a connection bolt 22 to provide a gap, a junction or contact surface of the pump part 10 with the motor part 11 can be reduced to the minimum. Resonance phenomenon generated by surface contact of the pump part 10 with the motor part 11 can thus be restricted to the minimum, thereby generation of noise can be reduced effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device capable of reducing noise level as much as possible.

[0002]

2. Description of the Related Art Conventionally, FIG.
There is a pump device B having a configuration shown in FIG.

The pump device B is, as shown in the figure,
It is configured by joining the pump unit 100 and the motor unit 101.

That is, the pump section 100 is constructed by combining a disk-shaped pump case 102 and a box-shaped pump case 103, and forms an impeller chamber 105 in which an impeller 104 is rotatably accommodated. is doing. The pump case 103 is provided with a suction port 106 at the center of the front surface and a discharge port 107 at the upper peripheral edge thereof.

On the other hand, the motor section 101 includes a cylindrical motor casing 108 having a built-in motor, and the motor casing 10.
The output shaft 110 projects forward from the central portion of the front wall 109 of 8. The tip of the output shaft 110 extends into the impeller chamber 105 of the pump unit 100, and the impeller 104 is attached to the extended end.

Further, as shown in FIGS. 12 and 13, a female screw portion 11 is formed on the front wall 109 of the motor portion 101 at intervals in the circumferential direction.
1 is formed. On the other hand, in the pump case 102 of the pump part 100 that contacts the front wall 109, the above-mentioned female screw part
A through hole 112 is provided at a position matching with 111. And
After inserting the connecting bolt 113 into the through hole 112 and screwing the tip of the connecting bolt 113 into the female screw portion 111, the pump case 102 can be connected to the front wall 109 in a tightened state.
The 100 can be reliably joined to the motor section 101.

As another conventional pump device, there is a pump device C shown in FIGS. 14 and 15.

The pump device C is, as shown in the drawing,
It is configured by joining the pump unit 200 and the motor unit 201 via a bracket 202.

That is, the pump unit 200 has an impeller chamber inside.
A box-shaped pump case 204 that forms 203, and a similarly box-shaped pump cover 206 that forms an impeller front chamber 205 inside.
The impeller chamber 20
3 and the impeller front chamber 205 are in communication with each other. An impeller 207 is rotatably housed in the impeller chamber 203. Further, the pump cover 206 is provided with a suction port 208 and a discharge port 209 at an upper peripheral edge thereof with a space in the width direction, the suction port 208 communicates with the impeller front chamber 205, and the discharge port 209 is connected to the impeller 209. It communicates with the chamber 203.

On the other hand, the motor unit 201 includes a cylindrical motor casing 210 containing a motor and a motor casing 21.
An output shaft 212 protruding forward from the central portion of the front wall 211 of 0 is extended. The tip of the output shaft 212 extends into the impeller chamber 203 of the pump unit 200, and an impeller 207 is attached to the extended end.

Further, as shown in FIGS. 14 and 15, a female screw portion 21 is formed on the front wall 211 of the motor portion 201 at circumferential intervals.
1a is formed. On the other hand, a rectangular flat plate-shaped bracket 202 is in contact with one side surface of the front wall 211, and a gap forming member / connecting leg portion 213 is provided below the contact surface. The bracket 202 can be fixedly connected to the motor portion 201 by inserting the connecting bolt 214 into the through hole provided in the connecting leg portion 213 and then screwing the tip of the connecting bolt 214 into the female screw portion 211a.

Further, the other side of the bracket 202 is in contact with the pump case 204 of the pump section 200, and
A plurality of female threaded portions 215 are provided around the periphery of the female threaded portion 215 in the circumferential direction at intervals.
Is provided. A connecting bolt that integrally penetrates the peripheral edge of the pump cover 206 and the peripheral edge of the pump case 204.
By screwing the tip of the 216 into the bracket 202,
The pump unit 200 can be fixedly connected to the bracket 202, and thus the pump unit 200 can be reliably joined to the motor unit 201.

[0013]

However, both of the pump devices B and C described above still have the following problems to be solved.

That is, in the pump device B shown in FIGS. 12 and 13, the joint surface between the front wall 109 of the pump portion 100 and the pump case 102 is in a plane-plane surface-joint state.

Further, as shown in FIGS. 14 and 15, in the pump device C in which the bracket 202 is interposed between the pump portion 200 and the motor portion 201, the bracket 202 and the pump case which are integral with the pump portion 200 are also provided. The joint surface with 204 is flat
It is in a flat surface contact state.

Therefore, due to this surface contact, the pump portion 100,
Vibration caused by pressure pulsation of water flow generated from 200 side (n
X (zxf)) and the vibration (nx (2xf)) caused by the rotation generated from the motor units 101 and 201 resonate with each other, and this resonance causes noise.

Particularly, in the conventional pump devices B and C, FIG.
3, As shown in Fig. 15, the pump parts 100 and 200 and the motor part 10
Since the contact area with 1,201 is large, the above-mentioned noise adverse effect becomes more serious.

In the above equation, n: 1, 2, 3,
Is an integer, z: the number of impeller blades, f:
This is the rotation speed of the impeller.

It is an object of the present invention to provide a pump device capable of significantly reducing the noise level by suppressing the resonance generated through the joint surface between the pump portion and the motor portion as much as possible.

[0020]

SUMMARY OF THE INVENTION The present invention is a pump device for joining a pump portion and a motor portion with a fitting such as a connecting bolt, wherein the pump portion-side contact surface other than the periphery of the fitting and the motor-side contact The present invention relates to a pump device characterized in that a gap is provided between the surfaces.

The present invention is also a pump device in which a motor section and a mounting plate are joined by a first mounting tool such as a connecting bolt, and a pump section and a mounting plate are joined by a second mounting tool such as a connecting bolt. In addition, the present invention relates to a pump device characterized in that a gap is provided between the contact surface on the pump portion side and the contact surface on the mounting plate side other than the periphery of the second fixture.

According to the present invention, in the pump device having the above-mentioned construction, the periphery of the fitting on the pump-side contact surface has a convex shape, and a washer is provided around the first fitting or the second fitting. There is also a structural feature in interposing members such as.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings, which are embodiments shown in FIGS.

(Embodiment 1) A pump device A according to this embodiment will be described in detail with reference to the embodiments shown in FIGS.

As shown in FIG. 1, the pump device A is constructed by joining a pump portion 10 and a motor portion 11 together.

That is, the pump section 10 is constructed by combining a disk-shaped pump case 12 and a box-shaped pump case 13, and an impeller chamber 15 for rotatably accommodating an impeller 14 is formed therein. is doing. Also the pump case
The suction port 16 is provided at the center of the front face of the port 13, and the discharge port 17 is provided at the upper peripheral edge of the port 13.

On the other hand, the motor section 11 is a motor (not shown).
A cylindrical motor casing 18 having a built-in motor, and an output shaft 20 protruding forward from the central portion of a front wall 19 of the motor casing 18.
And the tip of the output shaft 20 is the impeller chamber of the pump unit 10.
It extends to within 15 and the impeller 14 is attached to the extension end.

Further, as shown in FIGS. 1 and 3, female screw portions 19a are formed on the front wall 19 of the motor portion 11 at intervals in the circumferential direction. On the other hand, the pump part that is in contact with the front wall 19
The pump case 12 of 10 is provided with a through hole 21 at a position aligned with the above-mentioned female screw portion 19a. Then, after inserting the connecting bolt 22 as a mounting tool into the through hole 21, by screwing the tip of the connecting bolt 22 into the female screw portion 19a, the pump case 12 can be connected to the front wall 19 in a tightened state. The 10 can be reliably joined to the motor section 11.

However, in this embodiment, as shown in FIG.
An annular protrusion 30 is provided at a position aligned with the female screw portion 19a provided on 19
Is provided, and the pump unit 10 is provided only through the surface of the protrusion 30.
Is brought into contact with the motor unit 11.

Thus, in this embodiment, the connecting bolt 22
Since a protrusion 30 is provided between the pump-side contact surface and the motor-side contact surface other than around the fixture such as
The joint or contact area between the pump unit 10 and the motor unit 11 can be reduced as much as possible.

Therefore, the resonance phenomenon caused by the surface contact between the pump portion 10 and the motor portion 11 can be suppressed as much as possible, and the noise generation can be effectively reduced.

Further, it is preferable that the protrusion 30 has a diameter as small as possible from the viewpoint of preventing the above resonance, and it is sufficient to open a slight gap between the pump portion 10 and the motor portion 11 so as not to cause a resonance phenomenon. The thickness does not need to be thicker than necessary.

(Embodiment 2) FIGS. 4 to 7 show a pump device A according to this embodiment.

As shown in FIG. 4, the pump device A is constructed by joining a pump portion 50 and a motor portion 51 via a bracket 52 as a mounting plate.

That is, the pump unit 50 has an impeller chamber 53 inside.
Is formed by combining a box-shaped pump case 54 that forms the inside of the pump case 54 and a box-shaped pump cover 56 that forms the impeller front chamber 55 inside, and the impeller chamber 53 and the impeller front chamber 55 are in communication with each other. It has become. An impeller 57 is rotatably housed in the impeller chamber 53. Further, the pump cover 56 is provided with a suction port 58 and a discharge port 59 on the upper peripheral edge thereof with a space therebetween in the width direction, the suction port 58 communicates with the impeller front chamber 55, and the discharge port 59 is the impeller. It communicates with the room 53.

On the other hand, the motor section 51 is provided with a cylindrical motor casing 60 having a built-in motor and an output shaft 62 projecting forward from the central portion of the front wall 61 of the motor casing 60.
The tip of the output shaft 62 extends into the impeller chamber 53 of the pump section 50, and an impeller 57 is attached to the extension end.

Further, as shown in FIG. 4, female screw portions 61a are formed on the front wall 61 of the motor portion 51 at intervals in the circumferential direction. On the other hand, the front wall 61 has a rectangular flat plate-shaped bracket.
One side surface of 52 is in contact, and a gap forming member / connecting leg portion 52a is provided below the contact surface. The bracket 52 can be fixedly connected to the motor portion 51 by inserting the connecting bolt 64 into the through hole 63 provided in the connecting leg portion 52a and then screwing the tip of the connecting bolt 64 into the female screw portion 61a.

Further, the other side surface of the bracket 52 is in contact with the pump case 54 of the pump portion 50, and a plurality of female screw portions 65 are provided on the peripheral edge thereof at intervals in the circumferential direction. Then, the peripheral portion of the pump cover 56 and the pump case
The pump portion 50 can be fixedly connected to the bracket 52 by screwing the tip of the connecting bolt 66 as a fixture that integrally penetrates the peripheral portion of the 54 to the female screw portion 65 of the bracket 52, and by extension, the pump. The part 50 can be reliably joined to the motor part 51.

In the present embodiment, however, as shown in FIGS. 4 and 6, an annular projection 67 is formed on the bracket contacting side surface of the pump case 54 at a position aligned with the female screw portion 65 provided on the bracket 52. The pump part 50 is provided with a bracket 52 that is integrated with the motor part 51 only through the surface of the protrusion 67.
Will be abutted against.

Thus, in this embodiment, the connecting bolt 66
Since a gap is provided by providing a protrusion 67 between the pump side contact surface other than the periphery of the fixture such as the above and the motor side or the mounting plate side contact surface, the bonding or contact area between the pump section 50 and the motor section 51 can be reduced. It can be reduced as much as possible.

Therefore, the resonance phenomenon caused by the surface contact between the pump portion 50 and the motor portion 51 can be suppressed as much as possible, and the noise generation can be effectively reduced.

In the above structure, it is preferable that the protrusion 67 has a diameter as small as possible from the viewpoint of preventing the above-mentioned resonance, and a slight gap that does not cause a resonance phenomenon is provided between the pump section 50 and the motor section 51. Since it is enough, it is not necessary to make it thicker than necessary.

(Embodiment 3) A pump device A according to this embodiment will be described with reference to FIGS.

As shown in FIG. 7, the pump device A according to the present embodiment substantially relates to a modification of the pump device A according to the second embodiment, and has an annular shape integrally provided in the pump case 54. A washer 70 is used in place of the protrusion 67.

That is, as shown in FIGS. 7 and 8, in the present embodiment, the mounting plate contacting side surface of the pump case 54 and the pump case contacting surface of the bracket 52 as the mounting plate and the female thread portion 65 are provided. An annular washer 70 is provided between the matching portion and the pump.
It comes into contact with the bracket 52 that is integral with the.

Thus, in this embodiment, the connecting bolt 66
Since a washer 70 is provided between the contact surface on the pump side other than the periphery of the fitting such as the motor and the contact surface on the motor side or the mounting surface side, the contact area between the pump section 50 and the motor section 51 is reduced. It can be reduced as much as possible.

Therefore, the resonance phenomenon caused by the surface contact between the pump section 50 and the motor section 51 can be suppressed as much as possible, and the noise generation can be effectively reduced.

In the above structure, it is preferable that the washer 70 has a diameter as small as possible from the viewpoint of preventing the above-mentioned resonance, and a slight gap between the pump section 50 and the motor section 51 which does not cause the resonance phenomenon is opened. Since it is enough, it is not necessary to make it thicker than necessary.

Incidentally, FIG. 9 shows a pump device A according to this embodiment.
In addition, the case where the positioning pin 71 is further provided is shown.

(Noise Experiment) A noise experiment was conducted on the pump device A according to the second embodiment. The results are shown in FIG.

As a comparative example, a conventional pump device C shown in FIGS. 14 and 15 was used.

As is apparent from FIG. 10, the noise level a of the pump device A according to the present invention is significantly lower than the noise level c of the conventional pump device C in almost all frequency bands.

FIG. 11 shows changes in noise level when the contact area between the pump side contact surface and the motor side or mounting plate side contact surface in the pump device A according to the second embodiment is changed.

As is clear from the figure, the noise level decreases in proportion to the reduction of the contact area between the pump side contact surface and the motor side or mounting plate side contact surface. It can be seen that the noise level drops the most when placed around the toys.

[0055]

According to the present invention, in a pump device in which a pump and a motor are joined by a fitting such as a connecting bolt, a gap is provided between the pump-side contact surface and the motor-side contact surface other than the area around the fitting. There is. According to the present invention, a pump device in which a motor part and a mounting plate are joined by a first mounting tool such as a connecting bolt and a pump part and a mounting plate are joined by a second mounting tool such as a connecting bolt. A gap is provided between the contact surface on the pump section side and the contact surface on the mounting plate side other than around the fixture.

Therefore, the joint area or the contact area between the pump section and the motor section can be reduced as much as possible, and the resonance phenomenon caused by the surface contact between the pump section and the motor section can be suppressed as much as possible, and the noise is generated. Can be effectively reduced.

Further, when the above-mentioned gap is formed by using a washer, the outer shape of the pump can be simplified, the mold structure for the pump molding can be simplified, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of a pump device according to a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view taken along line I-I of FIG.

FIG. 4 is a partial cross-sectional side view of a pump device according to a second embodiment of the present invention.

FIG. 5 is a front view of the same.

6 is a sectional view taken along line II-II of FIG.

FIG. 7 is a partial cross-sectional side view of a pump device according to a third embodiment of the present invention.

8 is a sectional view taken along line III-III in FIG.

FIG. 9 is a cross-sectional view when a positioning pin is provided in the third embodiment.

FIG. 10 is a graph showing the results of noise experiments.

FIG. 11 is a chart showing the results of a noise experiment.

FIG. 12 is a side view of a conventional pump device.

13 is a sectional view taken along line IV-IV in FIG.

FIG. 14 is a side view of a conventional pump device.

15 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 A Pump device 10 Pump part 11 Motor part 22 Connecting bolt 30 Protrusion 67 Protrusion 70 Washer

Claims (4)

[Claims] 1. A pump device for joining a pump part and a motor part with a fitting such as a connecting bolt, wherein a gap is provided between the pump part side contact surface and the motor part side contact surface other than the vicinity of the fitting part. A pump device characterized by. 2. A pump device for joining a motor part and a mounting plate with a first mounting tool such as a connecting bolt, and a pump part and a mounting plate with a second mounting tool such as a connecting bolt. A pump device characterized in that a gap is provided between the contact surface on the pump portion side and the contact surface on the mounting plate side other than the periphery of the mounting tool. 3. The pump device according to claim 1, wherein the periphery of the fitting on the pump-side contact surface has a convex shape. 4. The pump device according to claim 1, wherein a member such as a washer is interposed around the first mounting tool or the second mounting tool.