JP2011069269A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump configured in such a manner that liquid is less likely to leak to the outside of the pump chamber. <P>SOLUTION: The pump 1 includes a blade wheel 2 sucking in and discharging the liquid, a pump case 4 internally provided with a motor section 3 for driving the blade wheel 2, and a casing 5 attached to the pump case 4. With the casing 5 attached to the pump case 4, the blade wheel 2 is rotatably held in the pump chamber 6 which is the area enclosed by the pump case 4 and the casing 5. The pump case 4 is formed with a recess 7 providing the pump chamber 6, a separation plate 8 for separating the motor section 3 from the pump chamber 6 is provided in a shape extending from the inner face of the recess 7 along a surface around the recess 7, and the casing 5 is attached to the pump case 4 via the separation plate 8. The pump case 4 is formed integrally to the separation plate 8 by filling a die 26 with a material and the outer periphery of the separation plate 8 is formed to project outward more than the outer periphery of the pump case 4 over the whole circumference. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a pump.

  Conventionally, a pump disclosed in JP 2007-278195 A (Patent Document 1) is known. This pump includes an impeller that sucks and discharges liquid, a pump case that internally includes a motor unit for driving the impeller, and a casing that is attached to the pump case. When the casing is attached to the pump case, the impeller is rotatably held in a pump chamber that is an area surrounded by the pump case and the casing.

  The pump case is formed with a recess serving as a pump chamber, and a separation plate for separating the motor portion and the pump chamber is provided along the inner surface of the recess and the surface around the recess extending from the inner surface. The casing is attached to the pump case via the separation plate. A sealing property is secured between the separation plate and the casing in order to prevent liquid from leaking from the pump chamber to the outside.

JP 2007-278195 A

  By the way, in the pump case of this pump, after the motor part and the separation plate are arranged in the mold, a resin material is placed in a region surrounded by the mold on the surface opposite to the surface on which the casing is attached on the separation plate. Formed by injection and filling, but at this time, the resin material goes over the separation plate and wraps around the surface of the separation plate where the casing is mounted, impairing the seal between the separation plate and the casing, and the liquid leaks out of the pump chamber There was a possibility.

  This invention is invented in view of the said prior art example, The subject is providing a pump with little possibility of a liquid leaking out of a pump chamber.

  In order to solve the above problems, in the invention according to claim 1 of the present application, an impeller that sucks and discharges liquid, a pump case that internally includes a motor unit for driving the impeller, a casing that is attached to the pump case, When the casing is attached to the pump case, the impeller is rotatably held in a pump chamber that is an area surrounded by the pump case and the casing, and the pump case has a recess serving as a pump chamber. A separation plate is provided for separating the motor portion and the pump chamber in a shape extending from the inner surface of the recess along the surface around the recess, and the casing is pumped through the separation plate. A pump attached to a case, wherein the pump case is formed integrally with a separation plate by filling a mold with a material, and the outer periphery of the separation plate is the entire circumference. Over and is characterized in that it is formed to protrude outward from the outer periphery of the pump case.

  Further, in the invention according to claim 2 of the present application, in the pump according to claim 1, an O-ring is interposed between the separation plate and the casing to prevent liquid from leaking outside the pump chamber. It is characterized in that ribs are provided along the vicinity of the outside of the ring.

  The invention according to claim 3 of the present application is characterized in that, in the pump according to claim 1 or 2, the material for integrally forming the pump case is an unsaturated polyester material made of a resin material.

  In the pump according to the first aspect of the present invention, the pump case is formed integrally with the separation plate by filling the mold with a material, and the outer periphery of the separation plate is the outer periphery of the pump case over the entire circumference. Since it is formed so as to protrude further outward, when the pump case is formed by filling the material in the region surrounded by the mold and the surface opposite to the surface on which the casing is mounted on the separation plate, the material is Beyond the separation plate, it is difficult to wrap around the surface on which the casing of the separation plate is attached, and there is little possibility of hindering the sealing performance between the pump case and the casing. Therefore, it is possible to prevent liquid leakage outside the pump chamber.

  In the pump according to the second aspect of the present invention, in particular, an O-ring is interposed between the separation plate and the casing to prevent liquid leakage to the outside of the pump chamber, and the separation plate is located near the outside of the O-ring. Since the ribs protruded along the surface, even if the filled material goes beyond the separation plate to the surface where the casing of the separation plate is mounted, the O-ring is interposed at the place where the rib is provided. Intrusion can be prevented, and sealing performance by the O-ring can be ensured.

  Further, in the pump according to the third aspect of the present invention, since the material that integrally forms the pump case is an unsaturated polyester material made of resin, the material of the casing of the separating plate exceeds the separating plate. It is possible to prevent wrapping around the surface to be installed.

It is sectional drawing of the pump in 1st Embodiment of this invention. It is sectional drawing in the manufacture process of the pump case in 1st Embodiment of this invention. It is sectional drawing of the pump in 2nd Embodiment of this invention. It is sectional drawing in the manufacture process of the pump case in 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a pump 1 according to a first embodiment of the present invention. The pump 1 includes an impeller 2 for sucking and discharging a liquid and a pump case 3 in which a motor unit 3 for driving the impeller 2 is provided. 4 and a casing 5 attached to the pump case 4. Further, by attaching the casing 5 to the pump case 4, the impeller 2 is rotatably held in the pump chamber 6 which is an area surrounded by the pump case 4 and the casing 5. A recess 7 to be 6 is formed. A separation plate 8 is provided to separate the motor unit 3 and the pump chamber 6 from the inner surface of the recess 7 along the surface around the recess 7, and the casing 5 is pumped through the separation plate 8. It is attached to the case 4.

  A shaft hole 9 is provided in the separation plate 8 at substantially the center of the bottom surface of the recess 7, and one end side of a columnar fixed shaft 10 is fitted into the shaft hole 9, and is approximately at the center of the pump chamber 6. The fixed shaft 10 is erected.

  Below the impeller 2 held in the pump chamber 6, a bearing 11 is provided continuously from the impeller 2, and the bearing 11 is a cylindrical slide that is slidable with respect to the cylindrical fixed shaft 10. A moving hole is provided, and when the bearing 11 slides (rotates) around the fixed shaft 10, the impeller 2 continuing from the bearing 11 is held rotatably around the fixed shaft 10. A permanent magnet 12 is installed on the outer circumference of the bearing 11 over the entire circumference.

  In the pump case 4, a stator 13 is provided so as to surround the pump chamber 6, and the stator 13 is composed of a coil provided with a winding 14. The winding 14 is connected to the control board 15 via a crimping terminal or a binding pin (not shown). When the winding 14 is energized from the control base 15, a rotating magnetic field is generated, and the permanent magnet 12 attracts and repels the generated rotating magnetic field, thereby rotating the impeller 2, the bearing 11, and the permanent magnet 12. The body 16 rotates around the fixed axis 10. Position detection means 17 for detecting the position of the rotating body 16 is attached to the control base 15, and the control base 15 receives a signal from the position detection means 17 so that the rotating body 16 rotates to the winding 14. Is controlled to control the rotating magnetic field. Here, the motor unit 3 mainly includes a stator 13, a control base 14, and position detection means 17. A connector 18 for supplying power from the outside to the control board 15 is provided at the end of the control board 15.

  On the surface around the recess 7 provided in the pump case 4, the flat surface 19 of the separation plate 8 is located. On the flat surface 19, the convex portion 20 surrounds the recess 7 outside the recess 7. Is protruding. Further, the outer periphery of the separation plate 8 is formed to protrude outward from the outer periphery of the pump case 4 over the entire periphery.

  The casing 5 has a contact surface 21 that contacts the flat surface 19 of the separation plate 8, and the casing 5 is attached to the pump case 4 by fitting the flat surface 19 and the contact surface 21 over the entire circumference. The pump case 4, the separation plate 8, and the casing 5 are provided with screw fixing holes 22 that communicate with each other at several locations. By fixing the screws 23 in the screw fixing holes 22, the casing 5 can be connected to the pump case 4. Fixed to. Further, when the casing 5 is attached to the pump case 4, since the O-ring 24 is interposed at the corner portion constituted by the convex portion 20 and the flat surface 19, the sealing performance between the separation plate 8 and the casing 5 is improved. Can be secured.

  Incidentally, the casing 5 is provided with a suction port 25 and a discharge port (not shown) for circulating water, and the suction port 25 and the pump chamber 6 communicate with each other. Since the pump chamber 6 becomes a flooded space due to the circulating water sucked from the suction port 25, the rotating body 16 is easily rotated by using the lubrication of the circulating water. When the impeller 2 rotates, a pump action occurs, and the circulating water is discharged from the discharge port. The above-described pump 1 is used, for example, as an eco-cute boiling pump, reheating pump or shower pump, a heat pump for a fuel cell device, or a pump for various cooling systems.

  Next, the manufacturing method of the pump case 4 of this embodiment is demonstrated based on FIG. The pump case 4 of the present embodiment is formed integrally with the separation plate 8 by filling a mold 26 with a resin material.

  The mold 26 includes an upper mold 26a and a lower mold 26b, and the separation plate 8 is installed in the lower mold 26b. At this time, the separation plate 8 is installed on the lower mold 26b with one surface side of the separation plate 8 to which the casing 5 is attached facing downward. Here, when the upper mold 26a and the lower mold 26b are brought into contact with each other from the other surface side opposite to the one surface side of the separation plate 8, the upper mold 26a and the lower mold 26b are brought into contact with each other. A space 27 surrounded by the mold 26b and the other surface side of the separation plate 8 is formed. The stator 13, the control board 15, the position detecting means 17, and the connector 18 are arranged in the space 27, and after joining the lower mold 26b and the upper mold 26a, the injection port provided in the upper mold 26b. From 28, the resin material is injected and filled into the space 27, and the mold 26 is cooled to form the pump case 4. By the way, in this embodiment, the outer periphery of the separation plate 8 protrudes outward from the inner periphery of the mold 26. Therefore, when the lower mold 26b and the upper mold 26a are joined, the upper mold 26b can be joined while pressing the outer periphery of the separation plate 8 against the lower mold 26a.

  Therefore, according to the pump 1 and the method for manufacturing the pump 1 of the present embodiment, the outer periphery of the separation plate 8 is formed so as to protrude outward from the outer periphery of the pump case 4 (that is, the inner periphery of the mold 26) over the entire periphery. Therefore, when the die 26 is joined, the upper die 26a can be joined while pressing the outer periphery of the separation plate 8 against the lower die 26b. Even if the void 27 is filled with a resin material. In addition, the resin material is less likely to wrap around to the one surface side where the casing of the separation plate 8 is attached beyond the separation plate 8, and there is little possibility of hindering the sealing performance between the pump case 4 and the casing 5. Therefore, leakage of liquid to the outside of the pump chamber 6 can be prevented.

  The resin material is preferably an unsaturated polyester material from the viewpoint of fluidity. By doing in this way, it can prevent that a material goes over to the one surface side where the casing 5 of the separating plate 8 is attached exceeding the separating plate 8. FIG.

  Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to the structure in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the pump 1 of the present embodiment, the flat surface 19 of the separation plate 8 is provided with a rib 29 projecting around the convex portion 20 on the outer side where the convex portion 20 is projected, and the flatness between the convex portion 20 and the rib 29 is provided. An O-ring 24 is interposed on the surface 19. By configuring the pump 1 in this way, the sealing performance between the pump case 4 and the casing 5 can be further enhanced.

  In addition, although the manufacturing method of the pump 1 of this embodiment is shown in FIG. 4, since it is the same as that of the content demonstrated in the said 1st Embodiment about a manufacturing method, description is abbreviate | omitted.

  Therefore, according to the pump 1 and the manufacturing method of the pump 1 of the present embodiment, the resin material filled in the mold 26 does not go beyond the separation plate 8 to one side where the casing 5 of the separation plate 8 is attached. Even so, it is possible to prevent the protruding rib 29 from entering the portion where the O-ring 24 is interposed, and the sealing performance by the O-ring 24 can be ensured.

DESCRIPTION OF SYMBOLS 1 Pump 2 Impeller 3 Motor part 4 Pump case 5 Casing 6 Pump chamber 7 Recess 8 Separation plate 9 Shaft hole 10 Fixed shaft 11 Bearing 12 Permanent magnet 13 Stator 14 Winding 15 Control board 16 Rotating body 17 Position detection means 18 Connector DESCRIPTION OF SYMBOLS 19 Flat surface 20 Convex part 21 Contact surface 22 Screw fixing hole 23 Screw 24 O-ring 25 Inlet 26 Mold 26a Upper mold 26b Lower mold 27 Space 28 Injection port 29 Rib

Claims (3)

An impeller that sucks and discharges liquid, a pump case that includes a motor unit for driving the impeller, and a casing that is attached to the pump case. The impeller is rotatably held in a pump chamber, which is a region surrounded by, and a recess serving as a pump chamber is formed in the pump case. From the inner surface of the recess to the surface around the recess A separation plate for separating the motor unit and the pump chamber in a shape extending along the casing is provided, and the casing is a pump attached to the pump case via the separation plate,
The pump case is formed integrally with the separation plate by filling the mold with a material, and the outer periphery of the separation plate is formed to protrude outward from the outer periphery of the pump case over the entire circumference. Features pump.   2. An O-ring that prevents leakage of liquid to the outside of the pump chamber is interposed between the separation plate and the casing, and a rib is provided in the separation plate along the vicinity of the outside of the O-ring. The pump described in.   The pump according to claim 1 or 2, wherein the material that integrally forms the pump case is an unsaturated polyester material made of a resin material.

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