WO2020137649A1 - ポンプ - Google Patents

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Publication number
WO2020137649A1
WO2020137649A1 PCT/JP2019/049121 JP2019049121W WO2020137649A1 WO 2020137649 A1 WO2020137649 A1 WO 2020137649A1 JP 2019049121 W JP2019049121 W JP 2019049121W WO 2020137649 A1 WO2020137649 A1 WO 2020137649A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
rotor
chamber
partition member
motor case
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/049121
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
伸博 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
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 Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to US17/293,979 priority Critical patent/US20220010810A1/en
Priority to CN201980086263.XA priority patent/CN113227584A/zh
Publication of WO2020137649A1 publication Critical patent/WO2020137649A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid 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
    • F04D29/62—Mounting; Assembling; Disassembling of 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
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present disclosure relates to pumps.
  • the turbomachine includes a motor unit having a rotor chamber that rotatably accommodates a rotor, and a pump unit having a pump chamber that rotatably accommodates an impeller connected to the rotor.
  • a partition member partitioning the rotor chamber and the pump chamber, a motor case forming the rotor chamber by the partition member, a pump cover forming the pump chamber by the partition member, and a rotor shaft of the rotor rotatable on the partition member.
  • a bearing for supporting the bearing The partition wall member has a boss portion that projects from the partition wall main body portion toward the rotor chamber and supports the bearing. The boss portion is formed with a linear communication hole that penetrates in the axial direction and connects the rotor chamber and the pump chamber.
  • the purpose of the present disclosure is to improve the workability when forming a diagonal communication hole in the boss portion of the partition member.
  • One configuration of the present disclosure is a partition wall member that partitions a rotor chamber that rotatably houses a rotor and a pump chamber that rotatably houses an impeller connected to the rotor, and the rotor by the partition member.
  • a motor case that forms a chamber
  • a pump cover that forms the pump chamber with the partition member
  • a bearing that rotatably supports the rotor shaft of the rotor on the partition member
  • the partition member A boss that projects from the partition wall main body toward the rotor chamber and supports the bearing, and a side surface of the boss that slopes radially inward toward the tip of the boss.
  • a projecting portion having a surface portion is projected, and the boss portion is formed with a communication hole that communicates the rotor chamber and the pump chamber and has an opening end portion on the rotor chamber side that opens to the inclined surface portion. It is a pump.
  • a working tool such as a drill may be vertically or substantially vertically contacted with the inclined surface portion of the protruding portion of the boss portion. it can. Therefore, as compared with the one disclosed in Japanese Unexamined Patent Publication No. 2012-17712, it is possible to improve the workability when the diagonal communication holes are formed in the boss portion of the partition member. Further, when the grease is injected into the bearing, the gas in the pump chamber flows through the communication hole that bypasses the bearing, so that the grease can be prevented from coming out of the bearing.
  • the protrusion of the protrusion on the side surface of the boss increases the support rigidity of the bearing by the boss and suppresses shaft runout of the rotor shaft of the rotor, as compared with the case where the protrusion does not protrude on the boss. be able to. As a result, it is possible to suppress an increase in the amount of heat generated by the bearing and suppress thermal deterioration of the bearing. As a result, the life of the pump can be improved.
  • FIG. 3 is a plan view schematically showing the centrifugal pump according to the first embodiment.
  • FIG. 2 is a sectional view taken along the line II-II of FIG. It is sectional drawing which shows the pump part of a centrifugal pump typically. It is a bottom view showing a pump body. It is sectional drawing which shows the boss part of a pump body. It is sectional drawing which shows the fastening part of a housing.
  • FIG. 6 is a bottom view showing a pump body according to the second embodiment.
  • FIG. 6 is a cross-sectional view schematically showing a pump section of a centrifugal pump according to a third embodiment. It is sectional drawing which shows the centrifugal pump concerning Embodiment 4 typically. It is sectional drawing which shows the centrifugal pump concerning Embodiment 5 typically. It is sectional drawing which shows the fastening part of a housing.
  • the first embodiment exemplifies a centrifugal pump used as a purge pump mounted on a vehicle such as an automobile.
  • the purge pump is a centrifugal pump that supplements the purge amount of purge gas from the canister to the intake passage of the internal combustion engine (engine).
  • 1 is a plan view schematically showing a centrifugal pump
  • FIG. 2 is a sectional view taken along the line II-II of FIG. Note that the orientation of the centrifugal pump is determined as shown by the arrows in FIGS. 1 and 2, but the orientation of the centrifugal pump is not specified.
  • the centrifugal pump 10 includes a pump unit 12 and a motor unit 14 arranged in the axial direction (vertical direction).
  • the centrifugal pump 10 corresponds to the "pump" in the present specification.
  • the housing 16 of the centrifugal pump 10 includes a pump cover 18, a pump body 20, and a motor case 22.
  • the pump cover 18 is formed in a short cylindrical shape whose upper surface is closed.
  • the motor case 22 is formed in a cylindrical shape.
  • the motor case 22 has a case cover 23 that closes the opening of the lower surface thereof.
  • the pump body 20 is formed in an annular plate shape.
  • the pump body 20 is sandwiched between the pump cover 18 and the motor case 22.
  • the upper surface of the outer peripheral portion of the pump body 20 and the opening end surface of the pump cover 18, and the lower surface of the outer peripheral portion of the pump body 20 and the opening end surface of the motor case 22 are in surface contact with each other.
  • the pump body 20 has an internal space formed by the pump cover 18 and the motor case 22 divided into upper and lower parts.
  • the pump cover 18, the motor case 22, and the case cover 23 are each made of resin.
  • the pump body 20 is made of metal.
  • the pump cover 18 and the pump body 20 form a pump housing 26.
  • the pump body 20, the motor case 22, and the case cover 23 form a motor housing 28.
  • the pump body 20 corresponds to the “partition wall member” in this specification.
  • the motor unit 14 is a brushless motor.
  • a substantially hollow cylindrical rotor chamber 29 is formed in the motor housing 28. In the rotor chamber 29, the stator 30, the rotor 32, etc. are housed.
  • the stator 30 is formed in a cylindrical shape and is concentrically and fixedly arranged in the motor case 22.
  • the stator 30 includes a stator core, a stator coil, and the like.
  • a substantially disk-shaped bearing holder 34 is horizontally installed in the lower end portion of the motor case 22.
  • a short cylindrical bearing portion 34a is concentrically formed on the center portion of the bearing holder 34.
  • the bearing holder 34 is made of metal.
  • the rotor 32 is concentrically and rotatably arranged in the hollow portion of the stator 30.
  • the rotor 32 includes a rotor shaft 36 and a plurality of permanent magnets 38.
  • the rotor shaft 36 is, for example, a solid shaft made of metal.
  • the permanent magnet 38 is arranged such that a plurality of magnetic poles are arranged in the circumferential direction at a position closer to the lower part of the axial center of the rotor shaft 36.
  • the upper end of the rotor shaft 36 is rotatably supported in the hollow portion of the pump body 20 via an upper bearing 40.
  • the lower end of the rotor shaft 36 is rotatably supported in the bearing portion 34 a of the bearing holder 34 via a lower bearing 41.
  • Both bearings 40 and 41 are ball bearings. Grease is injected into both bearings 40 and 41.
  • the upper bearing 40 corresponds to a bearing that rotatably supports the rotor shaft 36 of the rotor 32 on the pump body 20.
  • the pump body 20 has a function of a bearing holder.
  • a control circuit (not shown) is arranged in the motor case 22 between the case cover 23 and the bearing holder 34. Further, the motor case 22 has an electric connector portion. An external power supply connector is connected to the electrical connector portion. The rotor 32 is rotationally driven by the supply of electric power from the external power supply to the control circuit.
  • FIG. 3 is a sectional view schematically showing a pump portion of a centrifugal pump.
  • a substantially hollow disk-shaped pump chamber 44 is formed in the pump housing 26.
  • a hollow cylindrical suction port 46 protruding upward is formed at the center of the pump cover 18.
  • a suction port 47 is formed in the suction port 46 to communicate the inside and outside of the pump chamber 44.
  • a hollow cylindrical discharge port 53 is formed on the rear right side of the pump cover 18.
  • the discharge port 53 is projected outward in the tangential direction, that is, in the clockwise direction outward (rightward) from the outer peripheral portion of the pump cover 18 in a plan view (see FIG. 1 ).
  • a discharge port 54 is formed in the discharge port 53.
  • the discharge port 54 communicates with the rear end of the pump chamber 44.
  • An impeller 56 is rotatably housed in the pump chamber 44.
  • the impeller 56 has a disc-shaped main plate portion 56a and a plurality of blade portions 56b formed on the upper surface of the main plate portion 56a at predetermined intervals in the circumferential direction.
  • the main plate portion 56a faces the upper surface of the pump body 20 with a slight gap.
  • the blade portion 56b is formed in a strip plate shape extending upright and radially on the upper surface of the main plate portion 56a.
  • the impeller 56 is made of resin.
  • the impeller 56 is concentrically and integrally connected to the tip end (upper end) of the rotor shaft 36 of the rotor 32. Therefore, the impeller 56 is rotated as the rotor 32 rotates. The impeller 56 is rotated clockwise in a plan view.
  • the pump body 20 has an annular plate-shaped partition wall main body portion 60 and a substantially cylindrical boss portion 62 extending downward from the central portion of the partition wall main body portion 60. ..
  • the rotor shaft 36 is rotatably supported in the boss portion 62 via an upper bearing 40.
  • the boss portion 62 has a cylindrical main portion 63 and a protruding portion 64 that protrudes from a side surface portion of the main portion 63.
  • the protruding portion 64 has a conical shape formed concentrically with the boss portion 62.
  • an inclined surface portion 65 that is inclined radially inward toward the tip (downward) of the boss portion 62 is formed on the side surface of the protruding portion 64.
  • the axial cross section of the inclined surface portion 65 is linear.
  • the boss portion 62 has a straight communication hole 67 that connects the rotor chamber 29 and the pump chamber 44.
  • An opening end portion 67 a of the communication hole 67 on the rotor chamber 29 side is opened to the inclined surface portion 65 of the protruding portion 64.
  • the open end 67b of the communication hole 67 on the pump chamber 44 side is arranged in the vicinity of the upper bearing 40, that is, in the vicinity of the open end of the hollow portion 62a of the boss 62 on the pump chamber 44 side.
  • the communication hole 67 is formed with a straight line 67L orthogonal or substantially orthogonal to the inclined surface portion 65 of the protrusion 64 as a center line. That is, as shown in FIG. 5, with the machining tool 68 such as a drill abutting vertically or substantially perpendicularly on the inclined surface portion 65 of the projecting portion 64 of the boss portion 62, the machining tool 68 rotates to form a communication hole. 67 is formed by punching. A plurality of communication holes 67 may be arranged on the inclined surface portion 65.
  • the pump cover 18 and the motor case 22 basically have the same outer diameter or substantially the same outer diameter.
  • the pump body 20 basically has an outer diameter larger than the outer diameters of the pump cover 18 and the motor case 22. For this reason, an annular heat dissipation portion 61 is formed on the outer peripheral portion of the partition wall body portion 60 of the pump body 20 so as to project radially outward from the pump cover 18 and the motor case 22 and to be exposed from the housing 16 to the outside. (See Figure 1).
  • the pump body 20 is made of a metal material having higher thermal conductivity than the motor case 22.
  • the metal material having high thermal conductivity is, for example, aluminum.
  • a first positioning means 70 for concentrically positioning the pump body 20 and the pump cover 18 is provided between the pump body 20 and the pump cover 18.
  • the first positioning means 70 includes an annular first projection 72, which is formed concentrically on the upper surface of the partition body 60 of the pump body 20 near the outer circumference, and an inner circumference of the opening end of the pump cover 18. And a corner portion 73.
  • the first annular protrusion 72 is fitted into the inner peripheral side corner portion 73 of the opening end portion of the pump cover 18 with almost no gap. As a result, the pump body 20 and the pump cover 18 are positioned concentrically.
  • a second positioning means 75 for concentrically positioning the pump body 20 and the motor case 22 is provided between the pump body 20 and the motor case 22.
  • the second positioning means 75 includes an annular second annular projection 76 formed concentrically on the lower surface of the central portion of the partition body 60 of the pump body 20 in the radial direction, and a radial direction from the opening end of the motor case 22. And a flange-shaped fitting portion 77 protruding inward.
  • the second annular protrusion 76 is fitted in the fitting portion 77 of the motor case 22 with almost no gap. As a result, the pump body 20 and the motor case 22 are positioned concentrically.
  • a first seal member 80 which is an O-ring that elastically seals the opposing surfaces of the two, is provided.
  • the first seal member 80 is fitted in an annular groove 81 formed in the open end surface of the pump cover 18.
  • a second seal member 83 including an O-ring that elastically seals the opposing surfaces of the two.
  • the second seal member 83 is fitted in an annular groove 84 formed in the opening end surface of the motor case 22.
  • FIG. 6 is a sectional view showing a fastening portion of the housing.
  • a fastening portion 85 is provided on the outer peripheral portion of the housing 16.
  • the fastening portions 85 are arranged at a plurality of places (for example, three places) at predetermined intervals in the circumferential direction of the housing 16.
  • the fastening portion 85 includes an upper fastening piece 86 that projects radially outward from the opening end of the pump cover 18, a middle fastening piece 87 that projects radially outward from the opening end of the pump body 20, A lower fastening piece 88 that projects radially outward from the opening end of the motor case 22 is provided.
  • the upper fastening piece 86 and the lower fastening piece 88 are fastened with a tapping screw 90 with the middle fastening piece 87 interposed therebetween.
  • the tapping screw 90 corresponds to the "fastening part" in this specification.
  • the gas in the pump chamber 44 (specifically, the gap between the pump body 20 and the impeller 56) flows through the communication hole 67 that bypasses the upper bearing 40. This makes it possible to prevent the upper bearing 40 from leaking grease.
  • the protruding portion 64 is protruded from the side surface portion of the boss portion 62, the supporting rigidity of the upper bearing 40 by the boss portion 62 is increased as compared with the case where the protruding portion 64 is not protruded into the boss portion 62, and the rotor 32 is The shaft runout of the rotor shaft 36 can be suppressed. As a result, it is possible to suppress an increase in the amount of heat generated by the upper bearing 40 and suppress thermal deterioration of the upper bearing 40. As a result, the life of the pump can be improved.
  • the protruding portion 64 has a conical shape formed concentrically with the boss portion 62. Therefore, the side surface of the conical projecting portion 64 is used as the inclined surface portion 65, and the processing tool 68 such as a drill can be brought into vertical or substantially vertical contact.
  • the open end 67b of the communication hole 67 on the pump chamber 44 side is arranged near the hollow portion 62a of the boss 62. Therefore, the communication hole 67 can be communicated with the low pressure side portion of the pump chamber 44. For this reason, when grease is injected into the upper bearing 40, it is possible to suppress an increase in the pressure in the rotor chamber 29 and prevent grease from leaking from the upper bearing 40.
  • the position of the boss portion 62 in the vicinity of the hollow portion 62a means that the opening end portion 67b of the communication hole 67 on the pump chamber 44 side is located radially inward from the position of the opening end portion on the rotor chamber 29 side.
  • the pump body 20 is formed of a material having higher heat conductivity than the motor case 22, and a part thereof, that is, the heat dissipation portion 61 is exposed to the outside. Therefore, the heat generated in the upper bearing 40 can be radiated to the outside via the pump body 20. Thereby, the heat deterioration of the upper bearing 40 can be suppressed and the life of the centrifugal pump 10 can be improved.
  • the centrifugal pump 10 includes first positioning means 70 for concentrically positioning the pump body 20 and the pump cover 18, and second positioning means 75 for concentrically positioning the pump body 20 and the motor case 22. I have it. Therefore, the first positioning means 70 can concentrically position the pump body 20 and the pump cover 18, and the second positioning means 75 can concentrically position the pump body 20 and the motor case 22. Thereby, the coaxiality of the three parts of the pump body 20, the pump cover 18, and the motor case 22 can be improved, and the flow rate accuracy of the centrifugal pump 10 can be improved.
  • the shaft runout of the rotor shaft 36 of the rotor 32 is suppressed, it is possible to suppress an increase in the heat generation amount of the upper bearing 40 and suppress the thermal deterioration of the upper bearing 40. As a result, the life of the centrifugal pump 10 can be improved.
  • the centrifugal pump 10 includes a first seal member 80 that makes a face seal between the pump body 20 and the pump cover 18, and a second seal member 83 that makes a face seal between the pump body 20 and the motor case 22. I have it. Therefore, the first seal member 80 can face seal between the pump body 20 and the pump cover 18, and the second seal member 83 can face seal between the pump body 20 and the motor case 22. As a result, foreign matter can be suppressed from entering the pump chamber 44 and the rotor chamber 29 from the outside. Further, the assembly load applied to the face seals of the first seal member 80 and the second seal member 83 is smaller than the assembly load applied to the shaft seal. Therefore, the assemblability of the pump body 20 and the pump cover 18 and the assemblability of the pump body 20 and the motor case 22 can be improved.
  • the pump cover 18 and the motor case 22 are fastened together with the pump body 20 in between. Therefore, the pump cover 18 and the motor case 22 are fastened together by interposing the three components that are fastened together with the pump body 20 in between, as compared with the case where two components are fastened together, the number of parts and the set required for fastening are increased. The number of man-hours required can be reduced.
  • FIG. 7 is a bottom view showing the pump body.
  • the protruding portion 164 of the boss portion 162 of the pump body 20 has a hexagonal pyramid shape formed concentrically on the boss portion 162.
  • six inclined surface portions 165 are formed which incline radially inward toward the tip of the boss portion 162 (the surface direction in FIG. 7).
  • Each inclined surface portion 165 is a flat surface.
  • the communication hole 67 is formed with a straight line that is orthogonal or substantially orthogonal to one of the six inclined surface portions 165 as a center line.
  • a plurality of communication holes 67 may be arranged on one inclined surface portion 165, or may be arranged on two or more inclined surface portions 165 of the six inclined surface portions 165.
  • FIG. 8 is a sectional view schematically showing a pump portion of a centrifugal pump.
  • second positioning means 175 for concentrically positioning the pump body 20 and the motor case 22 is provided.
  • the second positioning means 175 includes a middle shaft portion 176 formed between the tip of the main portion 63 of the boss portion 62 of the pump body 20 and the protrusion portion 64, and a radial direction from a position near the opening end portion of the motor case 22. And a flange-shaped fitting portion 177 protruding inward.
  • the middle shaft portion 176 is fitted in the fitting portion 177 of the motor case 22 with almost no gap.
  • the pump body 20 and the motor case 22 are positioned concentrically.
  • the fitting portion 177 is formed with a ventilation hole 178 penetrating in the vertical direction.
  • the ventilation hole 178 is arranged at a position corresponding to the communication hole 67 of the pump body.
  • FIG. 9 is a sectional view schematically showing a centrifugal pump.
  • the rotor shaft 36 of the rotor 32 is supported by the pump body 20 in a cantilever manner. That is, the lower bearing 41 for supporting the lower end of the rotor shaft 36 with respect to the bearing holder 34 of the first embodiment (see FIG. 2) and the boss portion 62 of the bearing holder 34 are omitted. Further, the boss portion 62 of the pump body 20 is rotatably supported via two upper and lower bearings 40.
  • FIG. 10 is a sectional view schematically showing a centrifugal pump.
  • the heat dissipation portion 61 (see FIG. 2) of the pump body 20 of the first embodiment is omitted.
  • the pump body 20 has an outer diameter smaller than the outer diameters of the pump cover 18 and the motor case 22 and larger than the outer diameters of the first seal member 80 and the second seal member 83.
  • the pump body 20 is covered by a peripheral wall portion 21 formed on the outer peripheral portion of the opening end surface of the motor case 22. The upper end surface of the peripheral wall portion 21 is in surface-contact with the opening end surface of the pump cover 18.
  • FIG. 11 is a sectional view showing a fastening portion of the housing.
  • the upper fastening piece 86 of the pump cover 18 and the lower fastening piece 88 of the motor case 22 are fastened with a tapping screw 90.
  • the middle fastening piece 87 (see FIG. 6) of the pump body 20 of the first embodiment is omitted, and a portion corresponding to the middle fastening piece 87 is integrally formed with the lower fastening piece 88.
  • the pump cover 18 and the motor case 22 are fastened together with the pump body 20 in between.
  • the technology disclosed in this specification is not limited to the above-described embodiments, and modifications can be made without departing from the technology disclosed in this specification.
  • the pump of the technique disclosed in this specification may be applied to a pump used for pressure-feeding a gas other than the purge gas, for example, air.
  • the technology disclosed in this specification may be applied to pumps other than the centrifugal pump.
  • the brushless motor of the motor unit 14 may be replaced with a brushed motor.
  • the axial section of the inclined surface portion 65 of the protruding portion 64 of the boss portion 62 of the pump body 20 is not limited to a straight line shape, and may be a gentle convex arc shape or a gentle concave arc shape.
  • the protruding portion 164 of the boss portion 162 of the pump body 20 may be changed to a polygonal pyramid shape such as a triangular pyramid shape or a pentagonal pyramid shape.
  • the inclined surface portion 165 of the protruding portion 164 of the boss portion 162 is not limited to a flat surface, and may be a gentle convex curved surface, a gentle concave curved surface, or the like.
  • the shape of the protruding portion of the boss portion may be a shape other than the conical shape or the polygonal pyramid shape.
  • the protruding portion of the boss portion may have at least one inclined surface portion on a part of the side surface portion.
  • the inclined surface portion may be a flat surface, a gentle convex curved surface, a gentle concave curved surface, or may have the same cross section in one direction, for example, a gentle convex arc shape or a gentle concave arc shape.
  • the material having high thermal conductivity of the pump body 20 may be resin such as carbon-containing resin. Further, the heat dissipation portion 61 of the pump body 20 may be formed not only continuously over the entire circumference of the pump body 20 but also intermittently. Further, at least a part of the outer peripheral surface of the pump body 20 may be exposed to the outside as a heat dissipation portion.
  • seal member 80 and the second seal member 83 may be used for the same seal member 80 and the second seal member 83, or seal members having different wire diameters, inner diameters, and materials may be used.
  • fastening parts are not limited to the tapping screw 90, and bolts and nuts may be used. Further, the pump cover 18 and the motor case 22 may be fastened together, or may be fastened individually to the pump body 20.
  • a first aspect is to partition the rotor chamber by a partition member that partitions a rotor chamber that rotatably houses a rotor and a pump chamber that rotatably houses an impeller connected to the rotor, and the partition member.
  • a projecting portion having is projected, and the boss portion is formed with a communication hole that communicates the rotor chamber and the pump chamber and has an opening end portion on the rotor chamber side that opens to the inclined surface portion. It is a pump.
  • a working tool such as a drill is brought into vertical or substantially vertical contact with the inclined surface portion of the protruding portion of the boss portion. be able to. Therefore, as compared with the one disclosed in Japanese Unexamined Patent Publication No. 2012-17712, it is possible to improve the workability when the diagonal communication holes are formed in the boss portion of the partition member. Further, when the grease is injected into the bearing, the gas in the pump chamber flows through the communication hole that bypasses the bearing, so that the grease can be prevented from coming out of the bearing.
  • the protrusion of the protrusion on the side surface of the boss increases the support rigidity of the bearing by the boss and suppresses shaft runout of the rotor shaft of the rotor, as compared with the case where the protrusion does not protrude on the boss. be able to. As a result, it is possible to suppress an increase in the amount of heat generated by the bearing and suppress thermal deterioration of the bearing. As a result, the life of the pump can be improved.
  • a second aspect is the pump according to the first aspect, wherein the protruding portion has a conical shape or a polygonal pyramid shape formed concentrically on the boss portion.
  • the side surface of the conical or polygonal pyramidal protrusion can be used as an inclined surface to allow a machining tool such as a drill to abut vertically or substantially vertically.
  • a machining tool such as a drill
  • the “conical shape” in this specification includes a truncated cone shape.
  • the “polygonal pyramid shape” in the present specification includes a polygonal truncated pyramid shape.
  • a third aspect is the pump according to the first or second aspect, wherein the opening end portion of the communication hole on the pump chamber side is arranged in the vicinity of the hollow portion of the boss portion. ..
  • the communication hole can be communicated with the low pressure side portion of the pump chamber. For this reason, when grease is injected into the bearing, it is possible to suppress an increase in the pressure in the rotor chamber and prevent grease from leaking from the bearing.
  • a fourth aspect is the pump according to any one of the first to third aspects, wherein the partition member is made of a material having higher thermal conductivity than the motor case, and a part of the partition member is exposed to the outside. It is a pump.
  • the heat generated in the bearing can be radiated to the outside through the partition member. As a result, heat deterioration of the bearing can be suppressed and the life of the pump can be improved.
  • a fifth aspect is the pump according to any one of the first to fourth aspects, including first positioning means for concentrically positioning the partition member and the pump cover, the partition member and the motor case. And a second positioning means for concentrically positioning the pump.
  • the partition member and the pump cover can be positioned concentrically by the first positioning means, and the partition member and the motor case can be positioned concentrically by the second positioning means.
  • the coaxiality of the three parts of the partition member, the pump cover and the motor case can be improved, and the flow rate accuracy of the pump can be improved.
  • the shaft runout of the rotor shaft of the rotor is suppressed, it is possible to suppress an increase in the amount of heat generated by the bearing and suppress thermal deterioration of the bearing. As a result, the life of the pump can be improved.
  • a sixth aspect is the pump according to any one of the first to fifth aspects, including a first sealing member that makes a face seal between the partition member and the pump cover, the partition member and the motor case. And a second seal member for surface-sealing between the two.
  • the sixth aspect it is possible to face seal between the partition member and the pump cover by the first seal member, and face seal between the partition member and the motor case by the second seal member.
  • foreign matter can be suppressed from entering the pump chamber and the rotor chamber from the outside.
  • the assembly load applied to the face seals of the first seal member and the second seal member is smaller than the assembly load applied to the shaft seal. Therefore, the assemblability between the partition member and the pump cover and the assemblability between the partition member and the motor case can be improved.
  • a seventh aspect is the pump according to any one of the first to sixth aspects, wherein the pump cover and the motor case are fastened together with the partition member in between.
  • the pump cover and the motor case are fastened together by interposing the three components that are fastened together with the partition wall member in between, so that the number of parts required for fastening is increased as compared with the case where two components are fastened together. Also, the number of assembly steps can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2019/049121 2018-12-27 2019-12-16 ポンプ Ceased WO2020137649A1 (ja)

Priority Applications (2)

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US17/293,979 US20220010810A1 (en) 2018-12-27 2019-12-16 Pump Device
CN201980086263.XA CN113227584A (zh) 2018-12-27 2019-12-16 泵

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JP2018244385A JP2020105957A (ja) 2018-12-27 2018-12-27 ポンプ
JP2018-244385 2018-12-27

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CN119878584B (zh) * 2025-03-19 2025-06-17 普轩特泵业股份有限公司 一种高压离心泵

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0315696A (ja) * 1989-06-13 1991-01-24 Nikkiso Co Ltd 密閉型コンプレッサ
JP2016089726A (ja) * 2014-11-05 2016-05-23 株式会社豊田自動織機 ターボ機械
JP2017223151A (ja) * 2016-06-15 2017-12-21 三菱重工業株式会社 電動過給圧縮機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5389559B2 (ja) * 2009-07-23 2014-01-15 愛三工業株式会社 回転電動機の固定子及び燃料ポンプ
JP6649733B2 (ja) * 2015-09-30 2020-02-19 日本電産サンキョー株式会社 ステータ、モータおよびポンプ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0315696A (ja) * 1989-06-13 1991-01-24 Nikkiso Co Ltd 密閉型コンプレッサ
JP2016089726A (ja) * 2014-11-05 2016-05-23 株式会社豊田自動織機 ターボ機械
JP2017223151A (ja) * 2016-06-15 2017-12-21 三菱重工業株式会社 電動過給圧縮機

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CN113227584A (zh) 2021-08-06
US20220010810A1 (en) 2022-01-13

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