JP2015072018A - Centrifugal pump - Google Patents

Abstract

【Task】 Provided is a centrifugal pump 10 configured such that a coil unit 104 and a main body case 34 can be detachably fixed.
[Solution] By rotating at least one of the coil portion 104 and the main body case 34, the locking piece 124 provided on the coil portion 104 side and the engaging piece 100 provided on the main body case 34 side are engaged in a snap-fit manner. In addition, the centrifugal pump 10 is configured so that the coil unit 104 and the main body case 34 can be detachably fixed.
[Selection] Figure 1

Description

  The present invention is, for example, cooling water for various machines such as personal computers, computer servers, and printers, cooling water for internal combustion engines, etc., and fluid such as refrigerant used in the refrigerant circulation circuit of air conditioners such as air conditioners and refrigerators. Relates to centrifugal pump for sending.

  Conventionally, as a centrifugal pump for cooling a small machine such as cooling water of a relatively small machine such as a personal computer, a computer server, or a printer, it has been described in Patent Document 1 (Japanese Patent Laid-Open No. 2003-13878). Thus, the structure of the impeller is improved so as to form a plurality of flow passage portions through which the fluid extending radially from the center is formed in the impeller, so that the change in the cooling water circulation amount is small and the change in the cooling performance hardly occurs. A centrifugal pump configured as described above is disclosed.

  Patent Document 2 (Japanese Patent Laid-Open No. 2003-161284) discloses an impeller having a large number of blades formed on the outer periphery and a rotor magnet provided on the inner periphery, and a motor stator disposed on the inner periphery side of the rotor magnet. Thus, a thin centrifugal pump capable of realizing efficient cooling while achieving thinning is disclosed.

Japanese Patent Laid-Open No. 2003-13878 Japanese Patent Laid-Open No. 2003-161284

  However, such a conventional centrifugal pump can be applied to cooling a relatively small machine, but does not have a sturdy airtight structure. For example, the cooling water for an internal combustion engine, an air conditioner such as an air conditioner, a refrigerator, etc. It is not suitable for use in fluids that require pressure resistance and airtightness, such as refrigerant circulation circuits.

  In addition, with the conventional centrifugal pump structure, the coil part, which is the motor stator, cannot be removed, so even if you try to use a metal case, piping, etc. for use in fluids that require pressure resistance and airtightness, It cannot be fixed by heating such as brazing or welding, and a metal case and piping with high airtightness cannot be used.

  Furthermore, the bearing of the impeller is a bearing arranged on one side of the shaft of the impeller, which is unstable and has problems with durability and noise reduction.

  Further, in the centrifugal pump having such a conventional structure, since the bearing is in the fluid and lubricating oil cannot be used, the shaft member and the impeller are worn and damaged by the rotation of the impeller. Eccentricity occurs, making it difficult to maintain the intended pump performance.

  In view of such a current situation, the present invention can be fixed by heating such as welding, brazing, and welding, can use a metal case and piping with high airtightness, and can be used for fluids that require pressure resistance and airtightness. The object is to provide a possible centrifugal pump.

  Another object of the present invention is to provide a centrifugal pump in which a bearing of a rotary blade member has a stable structure and is excellent in durability and silence.

  Furthermore, the present invention is excellent in slidability even under non-lubricated conditions in which the bearing is in a fluid, and the shaft member and the impeller are not worn and damaged by the rotation of the impeller. An object of the present invention is to provide a centrifugal pump capable of maintaining the intended pump performance without rattling or eccentricity.

  Moreover, an object of this invention is to provide the centrifugal pump comprised so that a coil part and a main body case could be fixed so that attachment or detachment was possible.

The present invention was invented in order to achieve the problems and objects in the prior art as described above.
A rotating blade member composed of an impeller and a rotor magnet provided below the impeller;
A body case that houses the rotating blade member;
In order to introduce fluid into the impeller, a suction side joint member provided to communicate with the main body case;
A discharge-side joint member provided so as to communicate with the main body case in order to discharge fluid by rotation of the impeller;
A coil portion arranged to be located around the rotor magnet and rotating the rotary blade member;
By rotating at least one of the coil part and the body case,
The engaging piece provided on the coil portion side and the engaging piece provided on the main body case side are engaged in a snap-fit manner so that the coil portion and the main body case can be fixed detachably. It is characterized by.

By constituting in this way, by rotating at least one of the coil part and the main body case, the locking piece provided on the coil part side and the engaging piece provided on the main body case side are snap-fit. The coil portion and the main body case can be detachably fixed.

  Further, the centrifugal pump of the present invention, the locking piece provided on the coil part side is formed on the coil side fixing bracket fixed to the coil part,
The engagement piece provided on the main body case side is formed on a main body case side fixing bracket fixed to the main body case.

  The centrifugal pump of the present invention is
The locking piece provided on the coil portion side is formed with a locking notch,
The engaging piece provided on the main body case side is formed with a locking portion,
The locking part on the main body case side is configured to engage with a locking notch part on the coil part side.

  The centrifugal pump of the present invention is
The coil side fixing bracket includes a coil side fixing bracket main body, and an opening corresponding to the coil portion is formed at the center thereof.
On the inner peripheral edge of the opening of the coil side fixing bracket, the locking piece is formed so as to project on the inner peripheral side,
The main body case side fixing bracket includes a ring-shaped fixing bracket main body, and the engagement piece is formed to extend from the fixing bracket main body in the outer peripheral direction.

  The centrifugal pump of the present invention is
A fixing piece having a substantially L-shaped cross section is formed at a corner of the coil side fixing metal fitting body,
The fixed piece includes a fixed piece main body and an engagement piece formed by bending inwardly at a distal end of the fixed piece main body.
The fixed piece main body is configured to be able to be fixed to the coil portion by narrowing the fixed piece main body and engaging with the engaging piece after being mounted on the coil portion with the fixed piece main body expanded. To do.

The centrifugal pump of the present invention is
A rotating blade member composed of an impeller and a rotor magnet provided below the impeller;
A metal body case that houses the rotating blade member;
In order to introduce fluid into the impeller, a metal suction side joint member provided to communicate with the main body case;
A metal discharge-side joint member provided so as to communicate with the main body case in order to discharge fluid by rotation of the impeller;
A coil portion arranged to be located around the rotor magnet and rotating the rotary blade member;
The body case is
An upper body case;
A lower body case fixed to the upper body case;
A blade case that divides an internal space formed by the upper body case and the lower body case, forms a fluid introduction flow path in the upper part, and forms a rotating part housing space in the lower part for housing the rotating blade member; ,
While joining the upper body case, the lower body case, and the wing case are fixed in a sealed state,
The joint portion between the suction side joint member and the main body case and the joint portion between the discharge side joint member and the main body case are fixed in a sealed state.

  By constituting in this way, the upper body case constituting the metal body case, the lower body case, and the joint portion of the blade case can be fixed by heating, for example, welding, brazing, welding, Can be fixed in a sealed state.

  In addition, the joint between the metal suction side joint member and the main body case and the joint between the discharge side joint member and the main body case can be fixed by heating such as welding, brazing, welding, etc. It can be fixed.

  That is, it is a structure that enables a joining method having high airtightness such as welding and brazing and holding strength to these connecting portions.

  Accordingly, it is possible to use a centrifugal pump that can be used for fluids requiring high pressure resistance and airtightness because it can be fixed by heating such as welding, brazing, welding, etc., so that a highly airtight metal case and piping can be used. Can do.

  In addition, the internal space formed by the upper main body case and the lower main body case is partitioned, a fluid introduction flow path is formed above, and a blade case is formed which forms a rotating portion housing space for housing the rotating blade member below. Therefore, the fluid path can be easily formed.

  The centrifugal pump according to the present invention is characterized in that the main body case is made of a metal press-molded product, and the suction side joint member and the discharge side joint member are made of metal pipes. .

  As described above, the main body case is made of a metal press-molded product, and the suction side joint member and the discharge side joint member are made of metal pipes. A bonding method having high air tightness and holding strength is possible, and the cost can be reduced.

  The centrifugal pump according to the present invention is characterized in that the main body case and the coil portion are detachably fixed by a detachable means.

  By configuring in this way, the main body case and the coil portion are detachably fixed by the detachable means, so before fixing the coil portion to the main body case, for example, welding, brazing, Fixing by heating such as welding, or processing that requires heating can be performed, and workability is improved.

  In addition, since the main body case and the coil portion are detachably fixed by the detachable means, replacement when the coil portion fails can be easily performed. Furthermore, it is possible to arbitrarily select the wiring drawing direction and the joint direction.

The centrifugal pump of the present invention is
An upper bearing member that is disposed in the upper body case and pivotally supports the upper side of the shaft member of the rotary blade member;
A lower bearing member that is disposed in the lower body case and pivotally supports the lower side of the shaft member of the rotary blade member;
The upper bearing member is formed with a communication path that communicates the fluid introduction flow path and the rotating portion accommodating space.

  With this configuration, since the shaft member of the rotary blade member is pivotally supported by the upper bearing member and the lower bearing member, the bearing of the rotary blade member has a stable structure, and is durable and silent. A centrifugal pump excellent in performance can be provided.

  That is, the rotation of the rotating blade member is stabilized, the noise during rotation is reduced, and the vibration of the rotating blade member is reduced, thereby improving the durability.

  Furthermore, since the upper bearing member is formed with a communication path that connects the fluid introduction flow path and the rotating portion accommodating space, a separate flow path is not required and a flow path can be formed easily.

The centrifugal pump of the present invention is
The shaft member of the rotary blade member is fixed to the upper bearing member and the lower bearing member,
The rotary blade member is configured to rotate on the outer periphery of the shaft member.

  With this configuration, the shaft member of the rotating blade member is fixed to the upper bearing member and the lower bearing member, and the rotating blade member rotates on the outer periphery of the shaft member. In this case, the rotational sliding area increases and the contact surface pressure also decreases.

  Thereby, rotation of a rotary blade member is stabilized, the noise at the time of rotation is reduced, and durability is also improved by reducing the vibration of a rotary blade member.

The centrifugal pump of the present invention is
A shaft member is fixed to the rotary blade member, and the rotary blade member rotates between the upper bearing member and the shaft member and between the lower bearing member and the shaft member.

  By configuring in this way, the shaft member is fixed to the rotating blade member, and the rotating blade member rotates between the upper bearing member and the shaft member and between the lower bearing member and the shaft member. The rotation of the rotating blade member is stabilized, the noise during the rotation is reduced, and the vibration of the rotating blade member is reduced, thereby improving the durability.

  The centrifugal pump according to the present invention is characterized in that a rotating portion between the rotary blade member and the shaft member is made of a synthetic resin having good sliding properties.

  Further, the centrifugal pump of the present invention is characterized in that a rotating portion among the front upper bearing member, the lower bearing member, and the shaft member is made of a synthetic resin having good slidability.

  By using a synthetic resin with good slidability, such as a chemical-resistant lubricating resin (PPS, PTFE), the rotating part can be slid even under non-lubricated conditions where the bearing is in the fluid. The shaft member and the rotating blade member are not worn and damaged by the rotation of the rotating blade member, and the durability is improved, and the rotating blade member is not rattled or eccentric, and maintains the intended pump performance. Is possible.

ADVANTAGE OF THE INVENTION According to this invention, the centrifugal pump comprised so that a coil part and a main body case can be detachably fixed can be provided .
Further, according to the present invention, the upper body case constituting the metal body case, the lower body case, and the joint portion of the blade case can be fixed by heating, for example, welding, brazing, welding, Can be fixed in a sealed state.

  In addition, the joint between the metal suction side joint member and the main body case and the joint between the discharge side joint member and the main body case can be fixed by heating such as welding, brazing, welding, etc. It can be fixed.

  That is, it is a structure that enables a joining method having high airtightness such as welding and brazing and holding strength to these connecting portions.

  Accordingly, it is possible to use a centrifugal pump that can be used for fluids requiring high pressure resistance and airtightness because it can be fixed by heating such as welding, brazing, welding, etc., so that a highly airtight metal case and piping can be used. Can do.

  In addition, the internal space formed by the upper main body case and the lower main body case is partitioned, a fluid introduction flow path is formed above, and a blade case is formed which forms a rotating portion housing space for housing the rotating blade member below. Therefore, the fluid path can be easily formed.

FIG. 1 is a longitudinal sectional view of a centrifugal pump according to the present invention. FIG. 2 is a view taken along the line AA in FIG. FIG. 3 is a longitudinal sectional view similar to FIG. 1 for explaining a state where the coil portion is removed from the main body case of the centrifugal pump of the present invention. FIG. 4 is a perspective view seen from the upper surface side of the upper bearing member of the centrifugal pump of the present invention. FIG. 5 is a perspective view seen from the lower surface side of the upper bearing member of the centrifugal pump of the present invention. FIG. 6 is a top view of the upper bearing member of the centrifugal pump of the present invention. FIG. 7 is a top perspective view of the main body side fixing bracket of the centrifugal pump of the present invention. FIG. 8 is a top perspective view of the coil side fixing bracket of the centrifugal pump of the present invention. FIG. 9 is a longitudinal sectional view showing another embodiment of the centrifugal pump of the present invention.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

  1 is a longitudinal sectional view of a centrifugal pump according to the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 is a state where a coil portion is removed from a main body case of the centrifugal pump according to the present invention. 4 is a longitudinal sectional view similar to FIG. 1, FIG. 4 is a perspective view seen from the upper surface side of the upper bearing member of the centrifugal pump of the present invention, and FIG. 5 is a lower surface side of the upper bearing member of the centrifugal pump of the present invention. FIG. 6 is a top view of the upper bearing member of the centrifugal pump of the present invention, FIG. 7 is a top perspective view of the main body side fixing bracket of the centrifugal pump of the present invention, and FIG. 8 is the centrifugal of the present invention. It is an upper surface perspective view of the coil side fixing metal fitting of a pump.

  1-3, the code | symbol 10 has shown the centrifugal pump of this invention on the whole.

  As shown in FIGS. 1 to 3, the centrifugal pump 10 of the present invention includes a rotary blade member 12. As shown in FIG. 2, the rotary blade member 12 includes a plurality of (eight in this embodiment) blade members 16 radially extending in the outer peripheral direction on the upper part of the cylindrical bearing portion 14. It has.

  The number of blade members 16 may be selected according to the application of the centrifugal pump 10 and the required pump capacity, and is not particularly limited.

  As shown in FIG. 1, the blade member 16 includes a base end portion 18 extending from the bearing portion 14 in the outer peripheral direction, a bent portion 20 bent upward from the base end portion 18, and the bent portion 20. It is comprised from the outer blade | wing part 22 extended in the outer peripheral direction.

  By setting the shape of the blade member 16 to such a shape, the discharge capability can be improved by the action of the outer blade portion 22 due to the rotation of the blade member 16.

  Further, the rotor blade member 12 is formed with a rotor magnet housing portion 24 extending in the outer peripheral direction at the lower portion of the bearing portion 14. The rotor magnet housing portion 24 includes a flange portion 26 that extends from the lower portion of the bearing portion 14 in the outer circumferential direction, and a support portion 28 that extends downward from the flange portion 26.

  Then, a rotor magnet 32 made of an annular permanent magnet is fitted into a recess 30 constituted by the flange portion 26 and the support portion 28.

  Moreover, the centrifugal pump 10 of the present invention includes a metal main body case 34 that houses the rotary blade member 12 as shown in FIG. The main body case 34 includes an upper main body case 36, and the upper main body case 36 includes a top wall 38 and a side peripheral wall 40 that extends downward from the outer periphery of the top wall 38.

  As shown in FIGS. 1 and 2, the side peripheral wall 40 of the upper body case 36 is formed with a flange 44 in which an opening for fixing the metal suction side joint member 42 is formed. . As shown in FIG. 2, the suction side joint member 42 is fixed to the flange 44 in a sealed state by welding, brazing, welding, or the like. Thus, the suction side joint member 42 is configured to communicate with the main body case 34.

  Further, as shown in FIG. 2, the central angle of the side peripheral wall 40 of the upper body case 36 is shifted from the opening for fixing the suction side joint member 42 (in this embodiment, the central angle is 45 degrees). A flange 50 having an opening for fixing the metal discharge side joint member 46 is formed.

  Note that the shift angle is not particularly limited, and can be changed in design according to the application.

  As shown in FIG. 2, the discharge side joint member 46 is fixed to the flange 50 in a sealed state by, for example, welding, brazing, welding, or the like. Accordingly, the discharge side joint member 46 is configured to communicate with the main body case 34.

  As shown in FIGS. 1 and 2, the main body case 34 includes a lower main body case 48. The outer peripheral flange 52 of the lower main body case 48 is fixed to the inner wall of the lower end 51 of the side peripheral wall 40 of the upper main body case 36 in a sealed state, for example, by welding, brazing, welding, or the like. Thus, an internal space S <b> 1 surrounded by the upper body case 36 and the lower body case 48 is formed in the body case 34.

  As shown in FIG. 1, the lower main body case 48 includes, from the outer peripheral flange 52 of the lower main body case 48, a blade accommodating portion 54 that extends horizontally to the inner peripheral side, and extends downward from the blade accommodating portion 54. And a rotor magnet housing portion 56. Further, a bottomed cylindrical lower bearing member accommodating portion 58 is formed below the rotor magnet accommodating portion 56.

  The lower bearing member 60 is fitted into the lower bearing member accommodating portion 58 by, for example, press fitting. The lower end portion 66 of the shaft member 64 is fixed to the shaft hole 62 formed in the lower bearing member 60 so as to be supported by, for example, press fitting.

  A shaft member 64 is inserted into the bearing portion 14 of the rotary blade member 12 so that the rotary blade member 12 can rotate.

  Furthermore, as shown in FIGS. 1 and 2, the main body case 34 includes a blade case 68. The outer peripheral flange 70 of the blade case 68 is sealed between the lower end 51 of the upper main body case 36 and the outer peripheral flange 52 of the lower main body case 48, for example, by welding, brazing, welding, or the like. It is fixed with.

  The blade case 68 includes a side peripheral wall 72 extending upward from the outer peripheral flange 70, and a bent portion 74 bent downward from the side peripheral wall 72 in a shape along the bent portion 20 of the blade member 16. Further, an inner peripheral flange 75 extending upward from the bent portion 74 is formed.

  By setting it as such a shape, the blade | wing member 16 can be accommodated between the blade | wing case 68 and the blade | wing accommodating part 54 of the lower side main body case 48. FIG. The upper bearing member 78 is fitted to the inner peripheral flange 75 of the blade case 68 by, for example, press fitting. Thus, the upper bearing member 78 is stably supported by the inner peripheral flange 75 of the blade case 68, and eccentricity and vibration due to the rotation of the rotary blade member 12 can be prevented.

  An upper end portion 82 of the shaft member 64 inserted into the bearing portion 14 of the rotary blade member 12 is fixed to the shaft hole 80 formed in the upper bearing member 78 so as to be supported by, for example, press fitting. Yes.

  As shown in FIGS. 1 and 2, the diameter of the side peripheral wall 72 of the blade case 68 is smaller than the diameter of the side peripheral wall 40 of the upper body case 36, and The height is smaller than the height of the side peripheral wall 40 of the upper body case 36.

  Thereby, the blade case 68 divides the internal space S1 formed by the upper body case 36 and the lower body case 48 to form the fluid introduction flow path 84 on the upper side and the rotary blade member 12 on the lower side. Rotation part accommodation space S2 which accommodates is formed.

  As shown in FIG. 2, a flange 76 having an opening for fixing the discharge side joint member 46 is formed in a part of the side peripheral wall 72 of the blade case 68. The discharge side joint member 46 is fixed in a sealed state together with the flange 50 of the side peripheral wall 40 of the upper body case 36 by, for example, welding, brazing, welding, or the like. Thereby, the discharge side joint member 46 is configured to communicate with the rotating portion accommodating space S2 of the main body case 34.

Further, the blade member 16 of the rotary blade member 12 is configured to rotate in the direction indicated by the arrow F in FIG. 2 (counterclockwise in FIG. 2).
In this case, as shown in FIG. 2, the upstream side in the rotational direction of the blade member 16 gradually expands in the diameter-expanding direction on the flange 76, which is a fixed portion with the discharge-side joint member 46 of the side peripheral wall 72 of the blade case 68. An enlarged diameter portion 72a is provided. A connecting portion between the enlarged diameter portion 72a and the flange 76 constitutes a guide portion 72b inscribed in the side peripheral wall 40 of the upper body case 36.

  On the other hand, as shown in FIG. 2, the flange 76, which is fixed to the discharge-side joint member 46 of the side peripheral wall 72 of the blade case 68, extends in the radial direction on the downstream side in the rotational direction of the blade member 16. A flow control side wall 72c is formed.

By configuring in this way, as shown in FIG. 2, a flow control space S3 for storing fluid surrounded by the enlarged diameter portion 72a, the guide portion 72b, and the flow control side wall portion 72c is formed.
Then, as indicated by the arrow G, the fluid is guided from the enlarged diameter portion 72a to the guide portion 72b by the rotation of the blade member 16 of the rotary blade member 12, and is brought into contact with (pressed against) the flow control side wall portion 72c. ) Thereby, the fluid pressure on the side in the blade case 68 is increased, and the flow rate is increased.

  On the other hand, as shown in FIGS. 4 to 6, the upper bearing member 78 has a substantially crown shape, and a plurality of notches 88 are formed in the upper portion of the side wall 86, that is, in this embodiment, a center angle 90 is set. Four notches 88 are formed that are spaced apart from each other.

  Further, a central bearing portion 90 having a shaft hole 80 formed below is provided at the central portion of the upper bearing member 78, and the central bearing portion 90 and the side wall 86 are connected by a plurality of ribs 92. Has been. That is, in this embodiment, the four notches 88 are connected to each other by four ribs 92 formed at a center angle of 90 degrees and spaced apart from each other.

  By configuring in this way, as shown in FIGS. 5 and 6, four vertical flow paths 94 penetrating in the axial direction are formed.

  As a result, as shown by the arrow B in FIG. 1, the fluid sucked from the suction side joint member 42 flows from the fluid introduction flow path 84 formed by the blade case 68 and the upper body case 36 to the upper bearing member 78. It passes through the notch 88 in the side wall 86. Then, the fluid that has passed through the notch 88 is introduced into the rotating portion accommodating space S <b> 2 formed by the blade case 68 and the lower main body case 48 via the vertical flow path 94.

  Further, as shown in FIGS. 1 and 7, a metal body case side fixing bracket 96 constituting a detaching means is attached to the outer periphery of the rotor magnet housing portion 56 of the lower body case 48 by, for example, welding or brazing. It is fixed by welding, press fitting, etc.

  As shown in FIG. 7, the main body case side fixing metal fitting 96 includes a ring-shaped fixing metal fitting 98 and a plurality of protrusions extending from the fixing metal fitting main body 98 in the outer peripheral direction and spaced apart from each other at a constant interval. The engagement piece 100 is provided. Further, a locking portion 102 is formed at the center portion of the engagement piece 100 so as to protrude upward. In this embodiment, as shown in FIG. 7, six engaging pieces 100 are provided so as to be separated from each other at a central angle of 60 degrees.

  As shown in FIGS. 1 and 3, the centrifugal pump 10 of the present invention is disposed on the outer periphery of the rotor magnet housing portion 56 of the lower body case 48 so as to be positioned around the rotor magnet 32, and is rotated. A coil portion 104 that rotates the blade member 12 is provided. In the coil section 104, a plurality of coils 110 composed of windings 108 wound around a bobbin case 106 are spaced apart at regular intervals in the circumferential direction on an electronic board 112 for performing electronic control, although not shown. Is provided.

  Then, these coils 110 are molded with a mold resin to form a mold resin portion 114, thereby forming a coil portion 104. Although not shown, the coil portion 104 molded with the mold resin has a rectangular column shape as shown in FIG. 2 so that the coil side fixing bracket 116 can be easily fixed to the upper surface of the coil portion 104 as will be described later. It has a shape.

  As shown in FIG. 1, the coil portion 104 has a housing recess 118 for housing the rotor magnet housing portion 56 and the lower bearing member housing portion 58 of the lower body case 48 at the center portion thereof. Is formed.

  Further, as shown in FIGS. 1 and 8, the coil portion 104 includes a coil-side fixing bracket 116 that constitutes a detaching means. As shown in FIG. 8, the coil side fixing bracket 116 includes a flat plate-like coil side fixing bracket main body 120, and an opening 122 corresponding to the accommodating recess 118 of the coil portion 104 is formed at the center thereof. Yes.

  Then, two locking pieces 124 arranged so as to face each other are formed on the inner peripheral edge of the opening 122 so as to protrude upward on the inner peripheral side. A locking notch 126 is formed at the tip of the locking piece 124, and the locking part 102 of the body case side fixing bracket 96 is connected to the locking notch of the coil side fixing bracket 116 as will be described later. It is configured to engage with the portion 126.

  Furthermore, a fixing piece 128 having a substantially L-shaped cross section is formed at each of the four corners of the coil side fixing metal fitting body 120. The fixed piece 128 includes a fixed piece main body 130 and an engagement piece 132 formed by bending inwardly at the tip of the fixed piece main body 130.

  The coil side fixture 116 configured as described above is attached to the coil unit 104 in a state where the fixed piece main body 130 is expanded, and then the fixed piece main body 130 is narrowed and engaged with the engagement piece 132. The coil unit 104 is configured to be fixed.

  In order to detachably attach the coil portion 104 configured as described above to the lower portion of the main body case 34, the following may be performed.

  That is, as indicated by an arrow C in FIG. 3, the rotor magnet housing portion 56 and the lower bearing member housing portion 58 of the lower body case 48 are placed in the housing recess 118 formed in the central portion of the coil portion 104. Accommodate.

  In this state, as indicated by an arrow D in FIG. 3, at least one of the coil unit 104 and the main body case 34 is rotated. As a result, the locking piece 124 of the coil side fixing bracket 116 and the engaging piece 100 of the main body case side fixing bracket 96 are engaged, and the locking portion 102 of the main body case side fixing bracket 96 is elastically deformed. The coil side fixing bracket 116 is engaged with and fixed to a notch 126 for locking in a so-called snap-fit manner.

  Further, in order to remove the coil portion 104 from the main body case 34, the reverse operation is performed to rotate at least one of the coil portion 104 and the main body case 34 as indicated by an arrow D in FIG.

  As a result, the snap-fit engagement between the locking portion 102 of the body case-side fixing bracket 96 and the locking notch 126 of the coil-side fixing bracket 116 is released, and the locking piece of the coil-side fixing bracket 116 is released. 124 is disengaged from the engagement piece 100 of the main body case side fixing bracket 96. Thereby, as shown by the arrow C in FIG. 3, the coil portion 104 can be removed from below the main body case 34.

  1 and 3, reference numeral 134 denotes a drain hole formed in the coil portion 104.

  The centrifugal pump 10 of the present invention configured as described above is operated as follows.

  First, a current is passed through the coil 110 of the coil unit 104 to excite the coil 110, thereby acting on the rotor magnet 32 of the rotary blade member 12, and the shaft through which the rotary blade member 12 is inserted into the bearing unit 14. It can be rotated around the member 64.

  As a result, the blade member 16 of the rotary blade member 12 rotates, and the fluid sucked from the suction side joint member 42 is formed by the blade case 68 and the upper body case 36 as shown by the arrow B in FIG. From the fluid introduction flow path 84, it passes through the notch 88 of the side wall 86 of the upper bearing member 78.

  Then, the fluid that has passed through the notch 88 is introduced into the rotating portion accommodation space S <b> 2 formed by the blade case 68 and the lower main body case 48 via the vertical flow path 94 of the upper bearing member 78.

  Then, the fluid introduced into the rotating part accommodating space S2 by the rotational force of the blade member 16 of the rotating blade member 12 is discharged from the rotating part accommodating space S2 of the main body case 34 as shown by an arrow E in FIG. It is discharged through the side joint member 46.

  According to the centrifugal pump 10 of the present invention configured as described above, the joints of the upper body case 36, the lower body case 48, and the blade case 68 constituting the metal body case 34 are welded, for example. It can be fixed by heating such as brazing and welding, and can be fixed in a sealed state.

  Further, the joint between the metal suction side joint member 42 and the main body case 34 and the joint between the discharge side joint member 46 and the main body case 34 can be fixed by heating such as welding, brazing, or welding. Can be fixed in a sealed state.

  That is, it is a structure that enables a joining method having high airtightness such as welding and brazing and holding strength to these connecting portions.

  Accordingly, it is possible to use a centrifugal pump that can be used for fluids requiring high pressure resistance and airtightness because it can be fixed by heating such as welding, brazing, welding, etc., so that a highly airtight metal case and piping can be used. Can do.

  Further, the internal space S1 formed by the upper main body case 36 and the lower main body case 48 is partitioned, the fluid introduction flow path 84 is formed at the upper side, and the rotary portion storage space S2 for storing the rotary blade member 12 at the lower side is formed. Since the blade case 68 to be formed is provided, a fluid path can be easily formed.

  In this case, it is desirable that the main body case 34 is made of a metal press-formed product, and the suction side joint member 42 and the discharge side joint member 46 are made of metal pipes. Thereby, a joining method having high airtightness and holding strength such as welding and brazing can be applied to these connecting portions, and the cost can be reduced.

  Further, since the main body case 34 and the coil portion 104 are detachably fixed by the detachable means, in the case of this embodiment, the main body case side fixing bracket 96 and the coil side fixing bracket 116, the coil portion 104 is fixed to the main body. Before fixing to the case 34, the main body case 34 can be fixed by heating, such as welding, brazing, welding, or the like, and processing requiring heating can be performed, thereby improving workability.

  Moreover, since the main body case 34 and the coil part 104 are detachably fixed by the attaching / detaching means, replacement when the coil part 104 fails can be easily performed. Furthermore, the wiring drawing direction and joint direction (suction side joint member 42 and discharge side joint member 46) can be arbitrarily selected.

  In this case, in this embodiment, the engagement between the main body case side fixing bracket 96 and the coil side fixing bracket 116 is employed as the detaching means. That is, the engagement between the locking piece 124 of the coil side fixing bracket 116 and the engaging piece 100 of the main body case side fixing bracket 96, and the engagement portion 102 of the main body case side fixing bracket 96 and the coil side fixing bracket 116. It is comprised from the engagement with the notch part 126 for latching.

  However, the attachment / detachment means is not limited at all, and other attachment / detachment means such as screw engagement and uneven engagement can be employed.

  Furthermore, since the shaft member 64 of the rotary blade member 12 is pivotally supported by the upper bearing member 78 and the lower bearing member 60, the bearing of the rotary blade member 12 has a stable structure, and is durable and silent. It is possible to provide the centrifugal pump 10 excellent in the above.

  That is, the rotation of the rotating blade member 12 is stabilized, the noise during rotation is reduced, and the vibration of the rotating blade member 12 is reduced, so that the durability is also improved.

  Further, since the upper bearing member 78 is formed with a communication path (notch portion 88 and vertical flow path 94) for communicating the fluid introduction flow path 84 and S2, a separate pipe is not required and the flow path can be easily formed. Can be formed.

  Further, since the shaft member 64 of the rotary blade member 12 is fixed to the upper bearing member 78 and the lower bearing member 60, and the rotary blade member 12 rotates on the outer periphery of the shaft member 64, the rotary blade member 12 and the shaft member 64 are rotated. The rotational sliding area increases with the outer periphery of the contact surface, and the contact surface pressure also decreases.

  Thereby, rotation of the rotary blade member 12 is stabilized, noise during rotation is reduced, and vibration of the rotary blade member 12 is reduced, so that durability is also improved.

  In this case, the rotating portion between the rotary blade member 12 and the shaft member 64, that is, at least the inner periphery of the bearing portion 14 of the rotary blade member 12 and the outer periphery of the shaft member 64 are made of a synthetic resin having good slidability. It is desirable that

  Accordingly, the bearing 14 of the rotary blade member 12 and the shaft member 64 itself are made of a synthetic resin having good sliding properties, and only the inner periphery of the bearing 14 of the rotary blade 12 and the outer peripheral surface of the shaft member 64 are used. Can be coated with such a slidable synthetic resin.

  In this case, the synthetic resin having good slidability is not particularly limited, and for example, a chemical-resistant lubricating resin such as PPS and PTFE can be used.

  By using a synthetic resin with good slidability in this way, the slidability is excellent even under non-lubricated conditions where the bearing is in the fluid, and the shaft member 64 is rotated by the rotation of the rotary blade member 12. The blade member 12 is not damaged due to wear, and the durability is improved. Further, the rotating blade member 12 is not rattled or eccentric, and the desired pump performance can be maintained.

  In this case, although not shown, the shaft member 64 is fixed to the rotary blade member 12, and the rotary blade member is interposed between the upper bearing member 78 and the shaft member 64 and between the lower bearing member 60 and the shaft member 64. It is also possible to configure so that 12 rotates.

  By comprising in this way, rotation of the rotary blade member 12 is stabilized, the noise at the time of rotation is reduced, and the vibration of the rotary blade member 12 is reduced, thereby improving durability.

  Further, in this case as well, a synthetic resin having good slidability is used between the upper bearing member 78 and the shaft member 64 and between the lower bearing member 60 and the shaft member 64. can do.

  FIG. 9 is a longitudinal sectional view showing another embodiment of the centrifugal pump of the present invention.

  The centrifugal pump 10 of this embodiment has basically the same configuration as the centrifugal pump 10 of the first embodiment shown in FIGS. 1 to 8, and the same reference numerals are given to the same components. Detailed description thereof will be omitted.

  In the centrifugal pump 10 of Example 1 described above, the coil 110 is integrated by forming the mold resin portion 114 by being molded with a mold resin, thereby forming the coil portion 104.

  On the other hand, in the centrifugal pump 10 of this embodiment, as shown in FIG. 9, the coil 110 is disposed in a bottomed cylindrical coil case 136. The outer periphery 144 of the lid member 142 is fixed to the stepped portion 140 formed at the upper end of the side wall 138 of the coil case 136.

  The step 142 of the coil case 136 and the lid member 144 are fixed by welding, brazing, welding, press-fitting, or the like as necessary.

  By comprising in this way, mold resin can be abbreviate | omitted, and while being able to reduce cost, weight reduction can be achieved.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to this. For example, in the above embodiment, the coil side fixture 116 is fixed as shown in FIG. Although the structure is such that the piece main body 130 is narrowed and engaged with the engagement piece 132 to be fixed to the coil portion 104, although not shown, the coil side fixing bracket 116 is integrated with the mold resin to be attached to the coil portion 104. It can also be fixed.

  Furthermore, in the said Example, although the number of the suction side coupling members 42 and the discharge side joint members 46 was each one, it is also possible to provide two or more numbers of the suction side joint members 42 and the discharge side joint members 46. Various modifications can be made without departing from the scope of the present invention.

  The present invention is, for example, cooling water for various machines such as personal computers, computer servers, and printers, cooling water for internal combustion engines, etc., and fluid such as refrigerant used in the refrigerant circulation circuit of air conditioners such as air conditioners and refrigerators. It can be applied to centrifugal pumps for sending.

DESCRIPTION OF SYMBOLS 10 Centrifugal pump 12 Rotary blade member 14 Bearing part 16 Blade member 18 Base end part 20 Bending part 22 Outer blade part 24 Rotor magnet accommodating part 26 Flange part 28 Support part 30 Recess 32 Rotor magnet 34 Main body case 36 Upper main body case 38 Top wall 40 side peripheral wall 42 suction side joint member 44 flange 46 discharge side joint member 48 lower body case 50 flange 51 lower end 52 outer flange 54 blade housing part 56 rotor magnet housing part 58 lower bearing member housing part 60 lower bearing member 62 shaft Hole 64 Shaft member 66 Lower end portion 68 Blade case 70 Outer peripheral flange 72 Side peripheral wall 72a Expanded portion 72b Guide portion 72c Flow control side wall portion 74 Bent portion 75 Inner peripheral flange 76 Flange 78 Upper bearing member 80 Shaft hole 82 Upper end portion 84 Fluid introduction Channel 86 Side wall 88 Notch 90 Central axis Receiving part 92 Rib 94 Vertical flow path 96 Main body case side fixing metal fitting 98 Fixed metal fitting main body 100 Engagement piece 102 Locking part 104 Coil part 106 Bobbin case 108 Winding 110 Coil 112 Electronic substrate 114 Mold resin part 116 Coil side fixing metal part 118 Housing recess 120 Coil side fixing metal fitting 122 Opening 124 Locking piece 126 Locking notch 128 Locking piece 130 Fixing piece main body 132 Engagement piece 134 Drain hole 136 Coil case 138 Side wall 140 Step part 142 Lid member 144 Outer periphery S1 Internal space S2 Rotating part accommodation space S3 Flow control space

Claims (5)

A rotating blade member composed of an impeller and a rotor magnet provided below the impeller;
A body case that houses the rotating blade member;
In order to introduce fluid into the impeller, a suction side joint member provided to communicate with the main body case;
A discharge-side joint member provided so as to communicate with the main body case in order to discharge fluid by rotation of the impeller;
A coil portion arranged to be located around the rotor magnet and rotating the rotary blade member;
By rotating at least one of the coil part and the body case,
The engaging piece provided on the coil portion side and the engaging piece provided on the main body case side are engaged in a snap-fit manner so that the coil portion and the main body case can be fixed detachably. A centrifugal pump characterized by The locking piece provided on the coil part side is formed on a coil side fixing bracket fixed to the coil part,
The centrifugal pump according to claim 1, wherein the engagement piece provided on the main body case side is formed on a main body case side fixing bracket fixed to the main body case. The locking piece provided on the coil portion side is formed with a locking notch,
The engaging piece provided on the main body case side is formed with a locking portion,
The centrifugal pump according to any one of claims 1 to 2, wherein the locking part on the main body case side is configured to engage with a locking notch on the coil part side. The coil side fixing bracket includes a coil side fixing bracket main body, and an opening corresponding to the coil portion is formed at the center thereof.
On the inner peripheral edge of the opening of the coil side fixing bracket, the locking piece is formed so as to project on the inner peripheral side,
The said main body case side fixing metal fitting is provided with the ring-shaped fixing metal fitting main body, and the said engagement piece is formed so that it may extend in the outer peripheral direction from a fixing metal fitting main body. Centrifugal pump described in 1. A fixing piece having a substantially L-shaped cross section is formed at a corner of the coil side fixing metal fitting body,
The fixed piece includes a fixed piece main body and an engagement piece formed by bending inwardly at a distal end of the fixed piece main body.
The fixed piece main body is configured to be able to be fixed to the coil portion by narrowing the fixed piece main body and engaging with the engaging piece after being mounted on the coil portion with the fixed piece main body expanded. The centrifugal pump according to claim 4.

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