WO2023140131A1 - Dispositif de pompe - Google Patents

Dispositif de pompe Download PDF

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Publication number
WO2023140131A1
WO2023140131A1 PCT/JP2023/000238 JP2023000238W WO2023140131A1 WO 2023140131 A1 WO2023140131 A1 WO 2023140131A1 JP 2023000238 W JP2023000238 W JP 2023000238W WO 2023140131 A1 WO2023140131 A1 WO 2023140131A1
Authority
WO
WIPO (PCT)
Prior art keywords
partition member
sealing member
pump device
resin sealing
fixing
Prior art date
Application number
PCT/JP2023/000238
Other languages
English (en)
Japanese (ja)
Inventor
岳彦 矢沢
岳 山本
Original Assignee
ニデックインスツルメンツ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニデックインスツルメンツ株式会社 filed Critical ニデックインスツルメンツ株式会社
Publication of WO2023140131A1 publication Critical patent/WO2023140131A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling

Definitions

  • the present invention relates to a pump device in which a case forming a pump chamber and a partition member are welded together.
  • a pump device is described in Patent Document 1.
  • the pump device of Patent Document 1 is used to circulate engine cooling water.
  • the pump device of Patent Document 1 includes a motor having a rotor and a stator, an impeller arranged on one side of the rotor and rotating integrally with the rotor, a resin pump housing that houses the impeller, and a resin motor housing that covers the stator.
  • the motor housing is integrally formed with a facing surface that faces the impeller, a rotor chamber that houses the rotor, and a partition that is the bottom of the rotor chamber.
  • a circular pump-side flange is formed at the end of the pump housing on the motor housing side.
  • a circular motor-side flange is formed at the pump-housing-side end of the motor housing.
  • the pump housing is fixed from one side of the motor housing by welding together the pump-side flange and the motor-side flange.
  • the motor housing, the facing surface, the rotor chamber and the partition then form a pump chamber.
  • an object of the present invention is to provide a pump device capable of suppressing manufacturing costs.
  • the present invention provides a motor comprising a rotor and a stator arranged in a cylindrical shape on the outer peripheral side of the rotor; a resin impeller arranged on one side of the axial direction in which the rotation center axis of the rotor extends and rotating integrally with the rotor; a case for partitioning a pump chamber containing the impeller; and a fixing mechanism for detachably fixing the partition member and the resin sealing member, wherein the case and the partition member are made of a first resin material, the resin sealing member is made of a second resin material different from the first resin material, and the case and the partition member are fixed by welding.
  • the case that defines the pump chamber that houses the impeller and the partition member that is covered with the case and defines the pump chamber are fixed by welding.
  • the partition member and the resin sealing member are fixed by a detachable fixing mechanism. Therefore, even if a welding failure occurs between the case and the partition member, the partition member can be removed from the resin sealing member and discarded, so there is no need to discard the stator and the resin sealing member. Thereby, the manufacturing cost of the pump device can be suppressed.
  • the case and the partition member are made of a first resin material
  • the resin sealing member is made of a second resin material different from the first resin material. Therefore, the resin material of the case and the partition member constituting the pump chamber can be made of a resin material with excellent water resistance, and the resin material of the resin sealing member can be made of a resin material of poor water resistance, so that the manufacturing cost of the pump device can be suppressed compared to the case where all the members are made of a resin material excellent in water resistance.
  • the first resin material may be polyphenylene sulfide
  • the second resin material may be polybutylene terephthalate
  • the fixing mechanism preferably has a snap-fit structure. Since the snap-fit structure is a structure that mechanically engages using the elasticity of the resin member, the partition member and the resin sealing member can be easily attached and detached, and the partition member and the resin sealing member can be prevented from rattling.
  • the partition member includes a cylindrical portion arranged between the rotor and the stator, a collar portion extending radially outward from the one end of the cylindrical portion, and an end plate portion closing the other end of the cylindrical portion in the axial direction. It is preferable to have In this way, it is easy to provide a fixing mechanism that can be attached and detached in the axial direction.
  • the resin sealing member includes a cylindrical main body portion that accommodates the cylindrical portion inside and seals the stator, the main body portion has a facing surface that faces the flange portion in the axial direction, and an annular elastic member that is elastically deformed in the axial direction is arranged between the facing surface and the flange portion.
  • the elastic member functions as a sealing member, and the gap between the partition member and the resin sealing member can be sealed. Therefore, waterproofness can be improved.
  • the biasing force of the elastic member acts in the axial direction between the annular portion and the flange portion, it is possible to suppress rattling between the partition member and the resin sealing member when the partition member and the resin sealing member are detachably fixed in the axial direction by the fixing mechanism.
  • the motor includes a circuit board
  • the resin sealing member includes a bottom portion that closes the other side of the main body portion, and a cylindrical portion that extends from the main body portion to the other side of the bottom portion
  • the circuit board is housed inside the cylindrical portion.
  • the first fixing portion includes a first locking portion and a second locking portion that is circumferentially separated from the first locking portion
  • the second fixing portion includes a first hook portion and a second hook portion inserted between the first locking portion and the second locking portion
  • each of the first hook portion and the second hook portion includes an arm portion extending to the other side and a claw portion provided at the tip of the arm portion, and the first locking portion and the second locking portion respectively.
  • the collar portion has a first surface facing the other side, at least one of the first hook portion and the second hook portion has a base portion projecting from the first surface to the other side, the arm portion extends from the base portion toward the other side, and at least one of the first locking portion and the second locking portion has a wall surface facing the base portion in the axial direction and a projection projecting from the wall surface to the one side, and the engaging surface has
  • the claw portion is engaged from the other side, it is preferable that the convex portion abuts against the base portion from the other side and is crushed in the axial direction. In this way, even if the dimensional accuracy and the positional accuracy of the first fixing portion and the second fixing portion are low, it is possible to eliminate the gap in the axial direction between the partition member and the resin sealing member by crushing the convex portion.
  • a plurality of fixing mechanisms be provided at equal intervals in the circumferential direction of the axis. In this way, the partition member can be evenly fixed to the resin sealing member.
  • the partition member and the resin sealing member are fixed by a detachable fixing mechanism. Therefore, even if the case and the partition member do not need to be welded together, the partition member can be removed from the resin sealing member, so there is no need to discard the resin sealing member that covers the stator. Thereby, the manufacturing cost of the pump device can be suppressed.
  • FIG. 1 is a perspective view of a pump device 1 to which the present invention is applied;
  • FIG. 2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from one side;
  • FIG. 2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from the other side;
  • FIG. 2 is a cross-sectional view of the pump device shown in FIG. 1;
  • FIG. 3 is a perspective view of a fixing mechanism; It is an exploded perspective view of a fixing mechanism.
  • FIG. 1 is a perspective view of a pump device 1 to which the present invention is applied.
  • FIG. 2 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from one side.
  • FIG. 3 is an exploded perspective view of the pump device 1 shown in FIG. 1 as seen from the other side.
  • 4 is a cross-sectional view of the pump device shown in FIG. 1.
  • the axial direction L is defined as the direction in which the rotation center axis of the rotor of the motor, which will be described later, extends.
  • L1 the direction in the axial direction L
  • L2 the radial direction and the circumferential direction about the rotation center axis of the rotor are simply referred to as the "radial direction” and the "circumferential direction", respectively.
  • the pump device 1 includes a motor 2 including a rotor 3 and a stator 4 arranged cylindrically on the outer peripheral side of the rotor 3, a resin impeller 5 arranged on one side L1 of the rotor 3 and rotating integrally with the rotor 3, and a case 6 defining a pump chamber 60 that houses the impeller 5.
  • the pump device 1 also includes a partition member 7 covered with the case 6 from one side L1 to partition the pump chamber 60, a resin sealing member 8 that covers the stator 4 and overlaps the partition member 7 from the one side L1, and a fixing mechanism 9 that fixes the partition member 7 and the resin sealing member 8 by a snap-fit structure.
  • the pump device 1 moves the fluid in the pump chamber 60 by rotating the impeller 5 together with the rotor 3 .
  • the motor 2 includes a rotor 3, a stator 4 cylindrically arranged on the outer peripheral side of the rotor 3, and a circuit board .
  • Motor 2 is a DC brushless motor.
  • the rotor 3 includes a cylindrical holder 31 extending in the axial direction L, a cylindrical radial bearing 22 fixed inside the holder 31, a cylindrical magnet 23 held on the outer peripheral surface of the holder 31, and a support shaft 24 that rotatably supports the rotor 3 via the radial bearing 22.
  • the holder 31 is made of resin.
  • the holder 31 includes a small-diameter cylindrical portion 32 that holds the magnet 23 on its outer peripheral surface, a circular flange portion 33 that abuts the end of the magnet 23 on one side L1, and a large-diameter cylindrical portion 34 that protrudes from the flange portion 33 to the one side L1.
  • the outer diameter dimension of the small diameter tubular portion 32 is smaller than the outer diameter dimension of the large diameter tubular portion 34 .
  • the small-diameter tubular portion 32 and the large-diameter tubular portion 34 are provided coaxially.
  • the small-diameter cylindrical portion 32 holds the radial bearing 22 inside.
  • the magnet 23 is a neodymium bonded magnet.
  • the magnet 23 is entirely covered with a resin skin layer.
  • the outer diameter dimension of the magnet 23 is substantially the same as the outer diameter dimension of the flange portion 33 .
  • the support shaft 24 is a metal rod-shaped member.
  • the center axis of the support shaft 24 coincides with the rotation center axis of the rotor 3 .
  • the end of the support shaft 24 on the other side L ⁇ b>2 is press-fitted into a hole 74 formed in the partition member 7 .
  • An annular thrust bearing 25 is attached to the end of the support shaft 24 on one side L ⁇ b>1 .
  • Thrust bearing 25 abuts on the end of radial bearing 22 on one side L ⁇ b>1 .
  • An end portion of the support shaft 24 on one side L1 is held by a tubular portion 26 provided in the case 6 .
  • the tubular portion 26 is connected to a support portion 27 extending from the inner peripheral surface of an intake pipe 61 provided in the radial center of the case 6 to the other side L2.
  • Thrust bearing 25 is arranged between radial bearing 22 and tubular portion 26 .
  • the stator 4 has a stator core 41 and a coil 43 wound around the stator core 41 via an insulator 42 .
  • the stator core 41 includes an annular portion extending in an annular shape and a plurality of salient poles protruding radially inward from the annular portion.
  • the coil 43 is wound between a first collar portion 421 provided at the radial inner end of the insulator 42 covering the salient pole and a second collar portion 422 provided at the radial outer end.
  • motor 2 is a three-phase motor, and coil 43 includes a U-phase coil, a V-phase coil, and a W-phase coil.
  • the circuit board 21 is a rigid board such as a glass epoxy board, and is formed in a planar shape.
  • the circuit board 21 is arranged at the end portion of the other side L2 of the resin sealing member 8 and fixed to the resin sealing member 8 with screws or the like.
  • the circuit board 21 is covered with a cover 10 fixed to the end of the resin sealing member 8 on the other side L2.
  • the impeller 5 is made of resin. As shown in FIGS. 2 to 4, the impeller 5 includes a circular first plate 51, a plurality of blade portions 52 that protrude from the first plate 51 to one side L1 and are arranged at regular intervals in the circumferential direction, and a circular second plate 53 that contacts the tip of the blade portion 52 on the other side L2.
  • the first plate 51 is formed integrally with the holder 31 of the rotor 3 and extends radially outward from the end of the large-diameter cylindrical portion 34 of the holder 31 on the one side L1.
  • the case 6 is made of resin. As shown in FIGS. 1 to 4, the case 6 includes a facing wall 64 facing the impeller 5 on one side L1, a side wall 65 extending in the circumferential direction, and a flange portion 66 extending radially outward from the end of the side wall 65 on the other side L2.
  • the opposing wall 64 and side walls 65 constitute the pump chamber 60 .
  • the case 6 includes a suction pipe 61 extending along the axial direction L and a discharge pipe 62 extending in a direction orthogonal to the axial direction L. As shown in FIG.
  • the suction pipe 61 and the discharge pipe 62 each have a suction port 61a and a discharge port 62a at their ends.
  • the discharge pipe 62 is located radially outside the impeller 5 .
  • the impeller 5 rotates integrally with the rotor 3 around the rotation center axis by driving the motor 2
  • the fluid in the pump chamber 60 flows in the rotation direction due to the vanes 54 .
  • the fluid generates a centrifugal force, becomes low pressure on the radially inner side and high pressure on the radially outer side, is sucked from the suction port 61 a of the case 6 , and is discharged from the discharge port 62 a of the case 6 .
  • the partition member 7 is made of resin. As shown in FIGS. 1 to 4, the partition member 7 partitions the pump chamber 60 together with the case 6. As shown in FIGS. As will be described later, the case 6 and the partition member 7 are fixed by welding. Therefore, the case 6 and the partition member 7 are made of the same resin material. Further, the case 6 and the partition member 7 partition the pump chamber 60 and are therefore made of the first resin material that is excellent in water resistance and chemical resistance. More specifically, the first resin material is polyphenylene sulfide (PPS).
  • PPS polyphenylene sulfide
  • the partition member 7 includes a cylindrical portion 71 arranged between the rotor 3 and the stator 4, a flange portion 72 radially extending outward from an end portion of one side L1 of the cylindrical portion 71, and an end plate portion 73 closing an end portion of the other side L2 of the cylindrical portion 71.
  • the cylindrical portion 71 extends in the axial direction L. As shown in FIG.
  • the inner peripheral surface of the cylindrical portion 71 faces the outer peripheral surface of the magnet 23 .
  • a plurality of vertical ribs 71a linearly extending in the axial direction L are arranged at regular intervals in the circumferential direction.
  • a hole portion 74 into which the end portion of the support shaft 24 is press-fitted is provided in the central portion of the end plate portion 73 (see FIG. 4).
  • the outer diameter dimension of the collar portion 72 is the same as the outer diameter dimension of the collar portion 66 of the case 6 .
  • the collar portion 72 has an annular first surface 75 facing the other side L2, and the first surface 75 is provided with a plurality of ribs 76 extending in an arc around the rotation center axis. As shown in FIG. 3, in this embodiment, three ribs 76 are arranged on the same circle at regular intervals in the circumferential direction.
  • a second fixing portion 96 of the fixing mechanism 9, which will be described later, is arranged between the ribs 76 adjacent in the circumferential direction. The inner peripheral surface of each rib 76 contacts the outer peripheral surface 81a of the resin sealing member 8 when the partition member 7 is placed on the resin sealing member 8 from the one side L1. Thereby, the partition member 7 is positioned in the circumferential direction with respect to the resin sealing member 8 .
  • the case 6 and the partition member 7 are fixed by welding.
  • a welding method vibration welding, ultrasonic welding, or the like is adopted.
  • a welding portion 11 for joining the case 6 and the partition member 7 is provided between the flange portion 66 of the case 6 and the flange portion 72 of the partition member 7 .
  • the flange 66 of the case 6 has an annular welding protrusion 661 that protrudes toward the other side L2.
  • the flange portion 72 of the partition member 7 has an annular welding concave portion 721 facing the welding convex portion 661 from the other side L2.
  • the welding concave portion 721 opens to the one side L1 at the tip surface of the annular convex portion 722 that protrudes from the outer peripheral edge of the collar portion 72 to the one side L1.
  • the flange 66 of the case 6 and the annular projection 722 of the partition member 7 are brought into contact with each other in the axial direction L, and the projection 661 for welding and the recess 721 for welding are fitted together, and the welding projection 661 and the welding recess 721 are welded together by vibration welding or ultrasonic welding, thereby forming the ring-shaped welded portion 11.
  • the flange 66 of the case 6 may be provided with a welding recess recessed on one side L1
  • the flange 72 of the partition member 7 may be provided with a welding projection projecting on the one side L1.
  • the resin sealing member 8 is made of resin. As shown in FIG. 4 , since the resin sealing member 8 does not form the pump chamber 60 , it is made of a second resin material different from the first resin material forming the partition member 7 and the case 6 . For the second resin material, a resin material having lower water resistance and chemical resistance than the first resin material is selected. More specifically, the second resin material is polybutylene terephthalate (PBT). Polybutylene terephthalate is less expensive than polyphenylene sulfide due to its inferior water and chemical resistance.
  • the resin sealing member 8 is formed by insert-molding the stator 4 .
  • the resin sealing member 8 includes a cylindrical body portion 81 that seals the stator 4.
  • An outer peripheral surface 81a of the body portion 81 is cylindrical.
  • the outer diameter dimension of the body portion 81 is smaller than the outer diameter dimension of the flange portion 72 of the partition member 7 .
  • the body portion 81 includes a cylindrical inner peripheral surface 82 surrounding the cylindrical portion 71, and a facing surface 83 that extends radially outward from one side L1 of the inner peripheral surface 82 and faces the first surface 75 of the flange portion 72 in the axial direction L.
  • the inner peripheral surface 82 is in contact with the outer peripheral surface of the cylindrical portion 71 of the partition member 7 . As shown in FIG.
  • the inner peripheral surface 82 is provided with vertical grooves 82 a extending linearly in the axial direction L at positions corresponding to the vertical ribs 71 a of the cylindrical portion 71 . Therefore, when the partition member 7 is stacked on the resin sealing member 8 from one side L1, the vertical ribs 71a of the cylindrical portion 71 are fitted into the vertical grooves 82a of the inner peripheral surface 82. As shown in FIG. Thereby, the partition member 7 is positioned in the circumferential direction with respect to the resin sealing member 8 .
  • the resin sealing member 8 includes a bottom portion 84 closing the other side L2 of the tubular main body portion 81, and a cylindrical tubular portion 85 extending from the main body portion 81 to the other side L2.
  • the cylindrical portion 85 extends from the bottom portion 84 to the other side L2 and opens to the other side L2.
  • the circuit board 21 is accommodated inside the cylindrical portion 85 .
  • the circuit board 21 is fixed inside the cylindrical portion 85 with screws or the like.
  • the bottom portion 84 separates the space inside the body portion 81 from the space in which the circuit board 21 is arranged, and covers the end plate portion 73 of the partition member 7 from the other side L2.
  • the circuit board 21 is accommodated between the cover 10 fixed to the other end of the cylindrical portion 85 and the bottom portion 84 .
  • FIG. 5 is a perspective view of the fixing mechanism 9.
  • FIG. 6 is an exploded perspective view of the fixing mechanism 9.
  • the fixing mechanism 9 has a snap-fit structure. 5 and 6, the fixing mechanism 9 includes a first fixing portion 91 radially protruding from the outer peripheral surface 81a of the resin sealing member 8, and a second fixing portion 96 extending from the first surface 75 of the flange portion 72 to the other side L2.
  • the fixing mechanisms 9 are provided at a plurality of locations at equal intervals in the circumferential direction. As shown in FIGS. 2 and 3, in this embodiment, three fixing mechanisms 9 are provided at regular intervals in the circumferential direction.
  • the first fixing portion 91 includes a first locking portion 91a and a second locking portion 91b circumferentially separated from the first locking portion 91a.
  • the first locking portion 91a and the second locking portion 91b have shapes that are symmetrical with respect to a straight line extending along the axial direction L.
  • the first locking portion 91a and the second locking portion 91b each include an engaging surface 92 facing the other side L2, a wall surface 93 facing the one side L1, an inclined surface 94 inclined outward from the end of the wall surface 93 toward the other side L2, and a guide surface 94a connecting the engaging surface 92 and the inclined surface 94 and extending in the axial direction L.
  • the inclined surface 94 of the first engaging portion 91a and the inclined surface 94 of the second engaging portion 91b face each other in the circumferential direction. Further, the first locking portion 91a and the second locking portion 91b are provided with a convex portion 95 projecting from the wall surface 93 to the one side L1.
  • the second fixing portion 96 includes a first hook portion 96a that engages with the first locking portion 91a and a second hook portion 96b that engages with the second locking portion 91b.
  • the first hook portion 96a and the second hook portion 96b have shapes that are symmetrical with respect to a straight line extending along the axial direction L. As shown in FIG.
  • the first hook portion 96a and the second hook portion 96b include a base portion 98 having a contact surface 98a that protrudes from the first surface 75 of the collar portion 72 and faces the other side L2, an arm portion 99 that extends from the contact surface 98a of the base portion 98 to the other side L2, and a claw portion 97 provided at the tip of the arm portion 99.
  • the first hook portion 96a and the second hook portion 96b are inserted from the one side L1 between the first locking portion 91a and the second locking portion 91b.
  • the tip of the claw portion 97 moves along the inclined surface 94, and the arm portion 99 elastically deforms in the circumferential direction.
  • the arm portion 99 When the claw portion 97 passes through between the first locking portion 91a and the second locking portion 91b, the arm portion 99 returns to its original shape and the claw portion 97 engages the engaging surface 92 from the other side L2. Thereby, the partition member 7 and the resin sealing member 8 are fixed in the axial direction L by the fixing mechanism 9 .
  • the convex portion 95 projecting from the wall surface 93 of the first locking portion 91a and the second locking portion 91b includes a crushing portion 95a that contacts the contact surface 98a of the base portion 98 and is crushed in the axial direction L until the first hook portion 96a and the second hook portion 96b pass through between the first locking portion 91a and the second locking portion 91b.
  • the first locking portion 91a and the second locking portion 91b are respectively sandwiched between the claw portion 97 and the contact surface 98a without any gap. Therefore, in the fixing mechanism 9, relative movement in the axial direction L between the first fixing portion 91 and the second fixing portion 96 is restricted.
  • the annular elastic member 12 is arranged between the opposing surface 83 of the resin sealing member 8 and the first surface 75 of the partition member 7 overlapping the opposing surface 83 from one side L1.
  • the elastic member 12 is an O-ring 120 .
  • the O-ring 120 is arranged in an annular groove portion 83 a provided in the opposing surface 83 and contacts the first surface 75 .
  • the O-ring 120 is elastically deformed in the axial direction L and adheres tightly to the opposing surface 83 and the first surface 75 .
  • the arm portion 99 is elastically deformed in the circumferential direction so that the claw portions 97 of the first hook portion 96a and the second hook portion 96b are disengaged from the engaging surface 92, thereby moving the claw portions 97 in the circumferential direction and bringing the first hook portion 96a and the second hook portion 96b into contact with each other in the circumferential direction.
  • the first hook portion 96a and the second hook portion 96b can pass between the guide surface 94a of the first locking portion 91a and the guide surface 94a of the second locking portion 91b. Therefore, by moving the partition member 7 to the one side L1 with respect to the resin sealing member 8, the fixing mechanism 9 releases the engagement between the first fixing portion 91 and the second fixing portion 96, so that the partition member 7 can be removed from the resin sealing member 8.
  • a case 6 that defines a pump chamber 60 that houses an impeller 5 and a partition member 7 that is covered with the case 6 and defines the pump chamber 60 are fixed by welding. Further, the partition member 7 and the resin sealing member 8 are detachably fixed in the axial direction L by the fixing mechanism 9 . Therefore, even if a welding failure occurs between the case 6 and the partition member 7, the partition member 7 can be removed from the resin sealing member 8, so the resin sealing member 8 covering the stator 4 need not be discarded. Thereby, the manufacturing cost of the pump device 1 can be suppressed.
  • the case 6 and the partition member 7 are made of a first resin material, and the resin sealing member 8 is made of a second resin material different from the first resin material. More specifically, the case 6 and the partition member 7 are made of polyphenylene sulfide, and the resin sealing member 8 is made of polybutylene terephthalate.
  • polybutylene terephthalate is less expensive than polyphenylene sulfide in water resistance and chemical resistance. Therefore, the manufacturing cost of the pump device 1 can be suppressed as compared with the case where the resin sealing member is made of polyphenylene sulfide, which is the first resin material.
  • the first resin material is not limited to polyphenylene sulfide.
  • the second resin material is not limited to polybutylene terephthalate.
  • the partition member 7 includes a cylindrical portion 71 disposed between the rotor 3 and the stator 4, a collar portion 72 radially extending outward from the end of the cylindrical portion 71 on one side L1, and an end plate portion 73 closing the end of the cylindrical portion 71 on the other side L2.
  • the fixing mechanism 9 also includes a first fixing portion 91 provided on the outer peripheral surface 81 a of the resin sealing member 8 and a second fixing portion 96 extending from the collar portion 72 to the other side L ⁇ b>2 and engaged with the first fixing portion 91 . Therefore, the first fixing portion 91 provided on the resin sealing member 8 and the second fixing portion 96 provided on the partition member 7 can constitute the fixing mechanism 9 that can be attached and detached in the axial direction L. As shown in FIG.
  • the resin sealing member 8 includes a cylindrical body portion 81 that accommodates the cylindrical portion 71 inside and seals the stator 4.
  • the body portion 81 has an annular facing surface 83 that faces the flange portion 72 in the axial direction L.
  • the annular elastic member 12 is arranged in an elastically deformed state. Therefore, since the elastic restoring force of the elastic member 12 acts in the axial direction L between the facing surface 83 and the flange portion 72, when the partition member 7 and the resin sealing member 8 are fixed by the fixing mechanism 9, it is possible to suppress the partition member 7 and the resin sealing member 8 from rattling.
  • the motor 2 has a circuit board 21 connected to the coils 43 of the stator 4 .
  • the resin sealing member 8 includes a bottom portion 84 closing the other side L2 of the main body portion 81 and a cylindrical portion 85 extending from the main body portion 81 to the other side L2. Therefore, even if liquid leaking from the pump chamber 60 or the like passes through the elastic member 12 and enters the inner peripheral surface 82, the inside of the main body part 81 is separated from the inside of the cylindrical part 85 by the bottom part 84, so that the liquid can be prevented from reaching the circuit board 21.
  • the first fixing portion 91 includes a first locking portion 91a and a second locking portion 91b spaced apart from the first locking portion 91a in the circumferential direction.
  • the second fixing portion 96 includes a first hook portion 96a and a second hook portion 96b that are inserted between the first locking portion 91a and the second locking portion 91b.
  • Each of the first hook portion 96 a and the second hook portion 96 b includes an arm portion 99 extending to the other side L ⁇ b>2 and a claw portion 97 provided at the tip of the arm portion 99 .
  • Each of the first locking portion 91a and the second locking portion 91b has an engaging surface 92 facing the other side L2, and a claw portion 97 engages with the engaging surface 92 from the other side L2.
  • the fixing mechanism 9 having a snap-fit structure can be configured, and the claw portion 97 and the engaging surface 92 can be mechanically engaged by bending the arm portion 99 . Therefore, it is possible to configure the fixing mechanism 9 which can be easily attached and detached and which has less backlash.
  • the collar portion 72 has a first surface 75 facing the other side L2.
  • Each of the first hook portion 96a and the second hook portion 96b has a base portion 98 projecting from the first surface 75 to the other side L2, and the arm portion 99 extends from the base portion 98 to the other side L2.
  • Each of the first locking portion 91a and the second locking portion 91b has a wall surface 93 facing the base portion 98 in the axial direction L, and a convex portion 95 projecting from the wall surface 93 to the one side L1.
  • the gap in the axial direction L between the partition member 7 and the resin sealing member 8 can be eliminated by crushing the convex portion 95. Therefore, rattling in the axial direction L between the partition member 7 and the resin sealing member 8 can be suppressed.
  • the partition member 7 can be uniformly fixed to the resin sealing member 8 .
  • each of the first locking portion 91a and the second locking portion 91b is provided with the convex portion 95.
  • only one of the first locking portion 91a and the second locking portion 91b may be provided with the convex portion 95 projecting from the wall surface 93 facing the base portion 98 in the axial direction L to the one side L1.
  • the first fixing portion 91 (the first locking portion 91a and the second locking portion 91b) is a protruding portion radially protruding from the outer peripheral surface 81a of the resin sealing member 8.
  • a recess may be formed in the outer peripheral surface 81a of the resin sealing member 8 into which the second fixing portion 96 is inserted from one side L1, and the first fixing portion 91 may be provided on the inner surface of the recess.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un dispositif de pompe conçu pour supprimer les coûts de production.　Un dispositif de pompe 1 comprend un moteur 2 avec un rotor 3 et un stator 4, une roue 5 en résine située sur un côté L1 du rotor 3 et tournant avec le rotor 3, un boîtier 6 cloisonnant une chambre de pompe 60 abritant la roue 5, un élément de séparation en résine 7 recouvert par le boîtier 6 du côté L1 pour séparer la chambre de pompe 60 et disposé entre le rotor 3 et le stator 4, un élément d'étanchéité en résine 8 recouvrant le stator 4 et recouvert par l'élément de séparation 7 du côté L1, et un mécanisme de fixation 9 pour fixer de manière amovible l'élément de séparation 7 et l'élément d'étanchéité en résine 8. Le boîtier 6 et l'élément de séparation 7 sont constitués d'un premier matériau en résine, et l'élément d'étanchéité en résine 8 est constitué d'un second matériau en résine différent du premier. Le boîtier 6 et l'élément de séparation 7 sont fixés par soudage.
PCT/JP2023/000238 2022-01-20 2023-01-07 Dispositif de pompe WO2023140131A1 (fr)

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JP2022-006974 2022-01-20
JP2022006974A JP2023105938A (ja) 2022-01-20 2022-01-20 ポンプ装置

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WO2023140131A1 true WO2023140131A1 (fr) 2023-07-27

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027796A (ja) * 1998-07-10 2000-01-25 Toshiba Corp ファンモータ
JP2001244110A (ja) * 2000-02-28 2001-09-07 Toshiba Corp ファンモータ
JP2006283682A (ja) * 2005-04-01 2006-10-19 Kps Kogyo Kk Ｄｃモータポンプ、およびこれを用いたジェットバス
JP2011111953A (ja) * 2009-11-25 2011-06-09 Mitsubishi Electric Corp ポンプ及びヒートポンプ式給湯装置及びポンプの製造方法
CN203230630U (zh) * 2013-04-24 2013-10-09 苏州聚力电机有限公司 风扇框座的对合迭组结构
WO2019172196A1 (fr) * 2018-03-05 2019-09-12 株式会社デンソー Pompe électrique
JP2021120568A (ja) * 2020-01-31 2021-08-19 日本電産サンキョー株式会社 ポンプ装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027796A (ja) * 1998-07-10 2000-01-25 Toshiba Corp ファンモータ
JP2001244110A (ja) * 2000-02-28 2001-09-07 Toshiba Corp ファンモータ
JP2006283682A (ja) * 2005-04-01 2006-10-19 Kps Kogyo Kk Ｄｃモータポンプ、およびこれを用いたジェットバス
JP2011111953A (ja) * 2009-11-25 2011-06-09 Mitsubishi Electric Corp ポンプ及びヒートポンプ式給湯装置及びポンプの製造方法
CN203230630U (zh) * 2013-04-24 2013-10-09 苏州聚力电机有限公司 风扇框座的对合迭组结构
WO2019172196A1 (fr) * 2018-03-05 2019-09-12 株式会社デンソー Pompe électrique
JP2021120568A (ja) * 2020-01-31 2021-08-19 日本電産サンキョー株式会社 ポンプ装置

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