WO2021171658A1 - Dispositif de pompe - Google Patents

Dispositif de pompe Download PDF

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Publication number
WO2021171658A1
WO2021171658A1 PCT/JP2020/033018 JP2020033018W WO2021171658A1 WO 2021171658 A1 WO2021171658 A1 WO 2021171658A1 JP 2020033018 W JP2020033018 W JP 2020033018W WO 2021171658 A1 WO2021171658 A1 WO 2021171658A1
Authority
WO
WIPO (PCT)
Prior art keywords
return
impeller
casing
pump device
diffuser
Prior art date
Application number
PCT/JP2020/033018
Other languages
English (en)
Japanese (ja)
Inventor
大寛 笹山
武史 本多
和寛 塚本
大和田　道夫
Original Assignee
日立グローバルライフソリューションズ株式会社
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
Priority claimed from JP2020032578A external-priority patent/JP2021134738A/ja
Priority claimed from JP2020032580A external-priority patent/JP7194705B2/ja
Application filed by 日立グローバルライフソリューションズ株式会社 filed Critical 日立グローバルライフソリューションズ株式会社
Publication of WO2021171658A1 publication Critical patent/WO2021171658A1/fr

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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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/08—Multi-stage pumps the stages being situated concentrically
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers

Definitions

  • the present invention relates to a multi-stage centrifugal pump device.
  • centrifugal pump device As a centrifugal pump device, there is a multi-stage centrifugal pump device as shown in Patent Document 1.
  • the multi-stage centrifugal pump device of the present invention has a configuration in which a convex portion that fits into a concave portion provided on the stationary blade of the casing is provided on the back side of the return guide.
  • the multi-stage centrifugal pump device of the present invention includes a transmitter and an impeller portion, and the electric motor is located on the back side opposite to the pump chamber side with respect to the casing, and the blades.
  • the vehicle section has a guide cover, a first impeller, a crossover return, a shaft spacer, a return guide, and a second impeller, and the crossover return includes a return diffuser and a tandem diffuser.
  • the structure is such that an opening is provided between the return diffuser and the tandem diffuser.
  • FIG. 3 is a perspective view of a multi-stage centrifugal pump device according to an embodiment of the present invention. It is a front view of the multi-stage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover.
  • FIG. 5 is a right side view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention. It is a left side view of the multi-stage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover. It is a top view of the multistage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover.
  • FIG. 5 is a right side view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention. It is a left side view of the multi-stage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover. It is a top view of the multistage centrifugal pump device which concerns
  • FIG. 5 is a vertical cross-sectional view of a multi-stage centrifugal pump portion with an outer cover removed according to an embodiment of the present invention. It is a vertical cross-sectional view of the multi-stage centrifugal pump part with the cover removed, and is the enlarged view of the crossover return and the shaft spacer part, according to one embodiment of the present invention.
  • FIG. 5 is a perspective view of a guide cover as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a first impeller as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a second impeller as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a crossover return viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a crossover return viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a plan view of a crossover return having an opening in a tandem diffuser as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a shaft spacer as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a return guide viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a return guide viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a return guide viewed from the casing side according to an embodiment of the present invention.
  • FIG. 5 is a perspective view of a casing as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional perspective view in which a return guide is incorporated in a casing according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of a multi-stage centrifugal pump device according to an embodiment of the present invention.
  • FIG. 2 is a front view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention.
  • FIG. 3 is a right side view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention.
  • FIG. 4 is a left side view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention.
  • FIG. 5 is a top view of a multi-stage centrifugal pump device with an outer cover removed according to an embodiment of the present invention.
  • the multi-stage centrifugal pump device 100 includes a base 5, a pump unit 101, a pressure tank 6, a pressure switch 7, and an outer cover 11.
  • the base 5 is a member having a substantially rectangular parallelepiped shape.
  • a pressure tank 6, a pressure switch 7, and a pump portion 101 are arranged in communication with each other on the upper surface of the base 5.
  • the pressure tank 6 stores water pressurized by the pump unit 101.
  • the pressure switch 7 controls the start / stop of the pump unit 101 according to the pressure value.
  • the outer cover 11 is removable from the base 5. This is to enable the pump unit 101, the pressure tank 6, and the pressure switch 7 to be operated.
  • FIG. 6 is a vertical cross-sectional view of a multi-stage centrifugal pump portion with an outer cover removed according to an embodiment of the present invention.
  • FIG. 7 is a vertical cross-sectional view of a multi-stage centrifugal pump portion with an outer cover removed according to an embodiment of the present invention, and is an enlarged view of a crossover return and a shaft spacer portion.
  • FIG. 8 is a perspective view of the guide cover as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 9 is a perspective view of the first impeller as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 10 is a perspective view of the second impeller as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 11 is a perspective view of the crossover return as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 12 is a perspective view of the crossover return as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 13 is a plan view of a crossover return having an opening in the tandem diffuser as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 14 is a perspective view of the shaft spacer as viewed from the casing side according to an embodiment of the present invention.
  • FIG. 15 is a perspective view of the return guide as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 16 is a perspective view of the return guide as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 17 is a perspective view of the casing as viewed from the casing cover side according to an embodiment of the present invention.
  • FIG. 18 is a cross-sectional perspective view in which a return guide is incorporated in a casing according to an embodiment of the present invention.
  • the pump section 101 includes an electric motor 1, a casing 3, a casing cover 4, and an impeller section.
  • the impeller portion is located inside the casing 3, and is composed of a guide cover 21, a first impeller 14, a crossover return 22, a shaft spacer 23, a return guide 24, and a second impeller 15. Will be done.
  • the boss inner diameters of the first impeller 14, the second impeller 15, and the shaft spacer 23 have an H-cut shape 2a that matches the shape of the rotating shaft 2 of the motor 1 to have a detent function. doing.
  • the pump device 100 performs a centrifugal pump operation by rotating an impeller (first impeller 14 or second impeller 15) that is rotationally driven by the motor 1.
  • the motor 1 is located on the side (rear side) opposite to the casing cover 4 side with respect to the casing 3.
  • the guide cover 21 has an inlet passage 21a that guides the inflow water 4b from the suction port 4a formed in the casing cover 4 to the first impeller 14, and the pressurized water 14b discharged from the first impeller 14 is a casing. It also has a role as a cover for closing the inlet passage 24a on the casing cover 4 side of the return guide 24 so as not to leak into 3, and a groove 24c for mounting packing is provided on the outer periphery of the return guide 24 to improve watertightness. Is provided, a packing 25 is attached, and the structure is such that the inner wall of the guide cover 21 is water-sealed.
  • a part of the pressurized water 14b discharged from the first impeller 14 may become return water 14c due to a pressure difference and leak to the inlet passage 21a side of the guide cover 21, but the inlet of the first impeller 14
  • the structure is also such that the amount of leakage is reduced as much as possible by narrowing the gap gap between the outer peripheral portion 14a and the inner peripheral portion of the guide cover 21 to about 0.2 mm.
  • the crossover return 22 includes a return diffuser 22a and a tandem diffuser 22b.
  • the crossover return 22 has a role of changing the flow of the pressurized water 14b discharged from the first impeller 14 to a smooth flow and guiding the flow to the inlet passage 24a of the return guide 24.
  • a tandem diffuser 22b for clearing water 22a1 is provided, and an opening 22c is provided between the return diffuser 22a and the tandem diffuser 22b.
  • the motor 1 is located on the back side of the casing 3 opposite to the pump chamber side, and the impeller portion is It has a guide cover 21, a first impeller 14, a crossover return 22, a shaft spacer 23, a return guide 24, and a second impeller 15, and the crossover return 22 is a return diffuser 22a.
  • the tandem diffuser 22b By providing the tandem diffuser 22b, a uniform flow can be formed in the circumferential direction, and a multi-stage centrifugal pump device having excellent pump efficiency can be provided in order to solve the shortage of water pressure.
  • the return diffuser 22a is located on the outer peripheral side of the crossover return 22.
  • the tandem diffuser 22b is located on the inner peripheral side of the crossover return 22.
  • most of the return diffuser 22a is located on the outer peripheral side of the tandem diffuser 22b, and a part of the return diffuser 22c overlaps with the opening 22c.
  • the return diffuser 22a, the opening 22c, and the tandem diffuser 22b exist in the circumferential direction at a position having a diameter from the center of the tandem diffuser 22.
  • the shaft spacer 23 comes into contact with the boss rear end 14d of the first impeller 14 and the boss front end 15d of the second impeller 15, and keeps the distance between the first impeller 14 and the second impeller 15. It works. Further, the opening 22c between the return diffuser 22a and the tandem diffuser 22b provided on the crossover return 22 is provided so as to communicate with the inlet passage 24a of the return guide 24, and the flow path of the inlet passage 24a of the return guide 24 is provided. Do so with the effect of smooth flow as part of the wall 24b.
  • the return guide 24 guides the discharge from the crossover return 22 to the second impeller 15. Further, by narrowing the gap dimension ⁇ 2 between the inlet outer peripheral portion 15a of the second impeller 15 and the inner peripheral portion of the return guide 24 to about 0.2 mm, the pressurized water 15b discharged from the second impeller 15 is pressured. It also has a structure that reduces the return water 15c to the crossover return 22 side as much as possible due to the difference, and is fixed to the casing 3 by the screw hole 24d.
  • the pressurized water 15b repressurized by the second impeller 15 is cleared by a stationary blade 3a formed of a plurality of blades in the casing 3, discharged into the case of the casing 3, and passed through the discharge port 3b.
  • a stationary blade 3a formed of a plurality of blades in the casing 3 discharged into the case of the casing 3, and passed through the discharge port 3b.
  • water is supplied, it is desirable that the surface of the return guide 24 on the casing 3 side and the stationary blade 3a formed of a plurality of blades on the casing 3 are assembled so as to obtain watertightness.
  • the stationary blade 3a of the casing 3 may be provided on the casing 3 side of the return guide 24.
  • a labyrinth effect is produced and watertightness is produced by providing a convex portion 24e that fits into the concave portion 3c of the stationary blade 3a of the casing 3 on the back side of the return guide 24 and fitting the two. Do so with the effect of improvement.

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

Abstract

La présente invention concerne un dispositif de pompe centrifuge à étages multiples ayant une excellente efficacité de pompage. L'invention concerne un dispositif de pompe comprenant : un moteur électrique (1) ; des parties turbines (14, 15) qui sont entraînées en rotation par le moteur électrique ; et un carter (3) qui est positionné de façon à recouvrir les circonférences externes des parties turbines et qui forme une chambre de pompe avec une de ses parois externes, le dispositif de pompe effectuant une action de pompage centrifuge par la rotation d'un arbre rotatif du moteur électrique. Le carter comporte une aube (3a) de stator comprenant des sections en creux (3c), et un guide de retour (24) comporte, sur sa surface arrière, des sections en saillie (24e) devant être insérées dans les sections en creux.
PCT/JP2020/033018 2020-02-28 2020-09-01 Dispositif de pompe WO2021171658A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2020032578A JP2021134738A (ja) 2020-02-28 2020-02-28 多段渦巻きポンプ装置
JP2020-032578 2020-02-28
JP2020-032580 2020-02-28
JP2020032580A JP7194705B2 (ja) 2020-02-28 2020-02-28 多段渦巻きポンプ装置

Publications (1)

Publication Number Publication Date
WO2021171658A1 true WO2021171658A1 (fr) 2021-09-02

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Application Number Title Priority Date Filing Date
PCT/JP2020/033018 WO2021171658A1 (fr) 2020-02-28 2020-09-01 Dispositif de pompe

Country Status (1)

Country Link
WO (1) WO2021171658A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122800A (ja) * 1982-12-28 1984-07-16 Matsushita Electric Ind Co Ltd 電動送風機
JPS6036702A (ja) * 1983-08-10 1985-02-25 Ebara Corp 多段タ−ボ機械
JPH06193585A (ja) * 1992-10-15 1994-07-12 Man Gutehoffnungshuette Ag 戻り段及び半径方向膨張機を持つ伝動装置付き多軸ターボ圧縮機
US20010036404A1 (en) * 1993-10-18 2001-11-01 Yoshihiro Nagaoka Centrifugal fluid machine
JP2015143475A (ja) * 2014-01-31 2015-08-06 日立アプライアンス株式会社 ポンプ装置
WO2019176426A1 (fr) * 2018-03-15 2019-09-19 株式会社日立製作所 Pompe centrifuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122800A (ja) * 1982-12-28 1984-07-16 Matsushita Electric Ind Co Ltd 電動送風機
JPS6036702A (ja) * 1983-08-10 1985-02-25 Ebara Corp 多段タ−ボ機械
JPH06193585A (ja) * 1992-10-15 1994-07-12 Man Gutehoffnungshuette Ag 戻り段及び半径方向膨張機を持つ伝動装置付き多軸ターボ圧縮機
US20010036404A1 (en) * 1993-10-18 2001-11-01 Yoshihiro Nagaoka Centrifugal fluid machine
JP2015143475A (ja) * 2014-01-31 2015-08-06 日立アプライアンス株式会社 ポンプ装置
WO2019176426A1 (fr) * 2018-03-15 2019-09-19 株式会社日立製作所 Pompe centrifuge

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