WO2021171658A1 - Pump device - Google Patents

Pump device 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
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WO
WIPO (PCT)
Prior art keywords
return
impeller
casing
pump device
diffuser
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PCT/JP2020/033018
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French (fr)
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
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Publication date
Priority claimed from JP2020032580A external-priority patent/JP7194705B2/en
Priority claimed from JP2020032578A external-priority patent/JP2021134738A/en
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/en

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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
    • 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

The present invention provides a multistage centrifugal pump device having excellent pump efficiency. Provided is a pump device having: an electric motor (1); impeller parts (14, 15) that are rotationally driven by the electric motor; and a casing (3) that is positioned so as to cover the outer circumferences of the impeller parts and that forms a pump chamber with an outer wall thereof, the pump device performing a centrifugal pump action through rotation of a rotary shaft of the electric motor. The casing has a stator vane (3a) including recessed sections (3c), and a return guide (24) has, on the back surface thereof, protruding sections (24e) to be fitted into the recessed sections.

Description

ポンプ装置Pump device
　本発明は、多段渦巻きポンプ装置に関するものである。 The present invention relates to a multi-stage centrifugal pump device.
　渦巻きポンプ装置としては特許文献１に示すような、多段渦巻きポンプ装置がある。 As a centrifugal pump device, there is a multi-stage centrifugal pump device as shown in Patent Document 1.
特許６１５８１０６号公報Japanese Patent No. 6158106
　ポンプ効率が優れる多段渦巻きポンプ装置を提供する。 Provide a multi-stage centrifugal pump device with excellent pump efficiency.
　上記課題を解決するために、本発明の多段渦巻ポンプ装置は、リターンガイドの背面側に、ケーシングの静翼に設けられた凹部に嵌合する凸部を設けた構成とする。 In order to solve the above problems, 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.
　また、上記課題を解決するために、本発明の多段渦巻ポンプ装置は、電送機と羽根車部を備え、電動機は、ケーシングに対してポンプ室側とは反対側の背面側に位置し、羽根車部は、ガイドカバーと、第１の羽根車と、クロスオーバーリターンと、シャフトスペーサと、リターンガイドと、第２の羽根車と、を有し、クロスオーバーリターンは、リターンディフューザと、タンデムディフューザを備え、リターンディフューザとタンデムディフューザの間に開口部を有する構成とする。 Further, in order to solve the above problems, 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.
　ポンプ効率に優れる多段渦巻きポンプ装置を提供することができる。 It is possible to provide a multi-stage centrifugal pump device with excellent pump efficiency.
本発明の一実施例に係り、多段渦巻きポンプ装置の斜視図である。FIG. 3 is a perspective view of a multi-stage centrifugal pump device according to an embodiment of the present invention. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の正面図である。It is a front view of the multi-stage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の右側面図である。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. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の左側面図である。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. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の上面図である。It is a top view of the multistage centrifugal pump device which concerns on one Embodiment of this invention and removed the cover. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ部の縦断面図である。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. 本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ部の縦断面図であって、クロスオーバーリターンおよびシャフトスペーサ部を拡大した図である。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. 本発明の一実施例に係り、ガイドカバーをケーシングカバー側から見た斜視図である。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. 本発明の一実施例に係り、第１の羽根車をケーシング側から見た斜視図である。FIG. 5 is a perspective view of a first impeller as viewed from the casing side according to an embodiment of the present invention. 本発明の一実施例に係り、第２の羽根車をケーシングカバー側から見た斜視図である。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. 本発明の一実施例に係り、クロスオーバーリターンをケーシングカバー側から見た斜視図である。FIG. 5 is a perspective view of a crossover return viewed from the casing cover side according to an embodiment of the present invention. 本発明の一実施例に掛かり、クロスオーバーリターンをケーシング側から見た斜視図である。FIG. 5 is a perspective view of a crossover return viewed from the casing side according to an embodiment of the present invention. 本発明の一実施例に係り、タンデムディフューザに開口部を持つクロスオーバーリターンをケーシング側から見た平面図である。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. 本発明の一実施例に係り、シャフトスペーサをケーシング側から見た斜視図である。FIG. 5 is a perspective view of a shaft spacer as viewed from the casing side according to an embodiment of the present invention. 本発明の一実施例に係り、リターンガイドをケーシングカバー側から見た斜視図である。FIG. 5 is a perspective view of a return guide viewed from the casing cover side according to an embodiment of the present invention. 本発明の一実施例に係り、リターンガイドをケーシング側から見た斜視図である。FIG. 5 is a perspective view of a return guide viewed from the casing side according to an embodiment of the present invention. 本発明の一実施例に係り、ケーシングをケーシングカバー側から見た斜視図である。FIG. 5 is a perspective view of a casing as viewed from the casing cover side according to an embodiment of the present invention. 本発明の一実施例に係り、リターンガイドをケーシングに組み込んだ断面斜視図である。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.
　以下、本発明の実施形態を本発明の実施例の図面に沿って説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings of the examples of the present invention.
　まず、本発明の多段渦巻きポンプ装置の概要について図１～図５を用いて説明する。図１は、本発明の一実施例に係り、多段渦巻きポンプ装置の斜視図である。図２は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の正面図である。図３は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の右側面図である。図４は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の左側面図である。図５は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ装置の上面図である。 First, the outline of the multi-stage centrifugal pump device of the present invention will be described with reference to FIGS. 1 to 5. 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.
　多段渦巻きポンプ装置１００は、ベース５と、ポンプ部１０１と、圧力タンク６と、圧力スイッチ７と、外郭カバー１１と、から構成されている。ベース５は、略直方体形状の部材である。ベース５の上面には、圧力タンク６と、圧力スイッチ７と、ポンプ部１０１と、が連通して配置されている。 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.
　圧力タンク６は、ポンプ部１０１で加圧した水を蓄水するものである。 The pressure tank 6 stores water pressurized by the pump unit 101.
　圧力スイッチ７は、圧力値に応じてポンプ部１０１の起動・停止を制御するものである。 The pressure switch 7 controls the start / stop of the pump unit 101 according to the pressure value.
　外郭カバー１１はベース５に対し着脱自在である。これは、ポンプ部１０１や圧力タンク６や圧力スイッチ７を操作可能とするためである。 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.
　次に、ポンプ部１０１について図６～図１８を用いて説明する。図６は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ部の縦断面図である。図７は、本発明の一実施例に係り、外かくカバーを外した多段渦巻きポンプ部の縦断面図であって、クロスオーバーリターンおよびシャフトスペーサ部を拡大した図である。図８は、本発明の一実施例に係り、ガイドカバーをケーシングカバー側から見た斜視図である。図９は、本発明の一実施例に係り、第１の羽根車をケーシング側から見た斜視図である。図１０は、本発明の一実施例に係り、第２の羽根車をケーシングカバー側から見た斜視図である。図１１は、本発明の一実施例に係り、クロスオーバーリターンをケーシングカバー側から見た斜視図である。図１２は、本発明の一実施例に掛かり、クロスオーバーリターンをケーシング側から見た斜視図である。図１３は、本発明の一実施例に係り、タンデムディフューザに開口部を持つクロスオーバーリターンをケーシング側から見た平面図である。図１４は、本発明の一実施例に係り、シャフトスペーサをケーシング側から見た斜視図である。図１５は、本発明の一実施例に係り、リターンガイドをケーシングカバー側から見た斜視図である。図１６は、本発明の一実施例に係り、リターンガイドをケーシングカバー側から見た斜視図である。図１７は、本発明の一実施例に係り、ケーシングをケーシングカバー側から見た斜視図である。図１８は、本発明の一実施例に係り、リターンガイドをケーシングに組み込んだ断面斜視図である。 Next, the pump unit 101 will be described with reference to FIGS. 6 to 18. 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.
　ポンプ部１０１は、電動機１と、ケーシング３と、ケーシングカバー４と、羽根車部を備える。羽根車部はケーシング３の内部に位置し、ガイドカバー２１と、第１の羽根車１４と、クロスオーバーリターン２２と、シャフトスペーサ２３と、リターンガイド２４と、第２の羽根車１５とから構成される。第１の羽根車１４と、第２の羽根車１５と、シャフトスペーサ２３のボス内径形状は、電動機１の回転軸２の形状に合わせ、Ｈカット形状２ａにすることで、廻り止め機能を有している。 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.
　ポンプ装置１００は、電動機１で回転駆動される羽根車（第１の羽根車１４や第２の羽根車１５）の回転により、渦巻きポンプ作用を行う。 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.
　電動機１は、ケーシング３に対し、ケーシングカバー４側とは反対側（背面側）に位置する。 The motor 1 is located on the side (rear side) opposite to the casing cover 4 side with respect to the casing 3.
　ガイドカバー２１は、ケーシングカバー４に形成された吸込口４ａからの流入水４ｂを第１の羽根車１４に導く入口通路２１ａを持つとともに、第１の羽根車１４から吐出された加圧水１４ｂがケーシング３内に漏れないように、リターンガイド２４のケーシングカバー４側の入口通路２４ａを塞ぐためのカバーとしての役割も持っており、水密性を高めるためリターンガイド２４の外周にパッキン装着用の溝２４ｃを設けパッキン２５を装着し、ガイドカバー２１の内壁とで水封する構造にしている。また、第１の羽根車１４から吐出された加圧水１４ｂの一部は圧力差により戻り水１４ｃとなってガイドカバー２１の入口通路２１ａ側へ漏れる恐れがあるが、第１の羽根車１４の入口外周部１４ａとガイドカバー２１の内周部とのギャップ隙間寸法を０．２ｍｍ程度に狭めることで漏れ量を極力減らす構造にもなっている。 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. Further, 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.
　クロスオーバーリターン２２は、リターンディフューザ２２ａと、タンデムディフューザ２２ｂとを備える。 The crossover return 22 includes a return diffuser 22a and a tandem diffuser 22b.
　クロスオーバーリターン２２は、第１の羽根車１４から吐出した加圧水１４ｂの流れをスムーズ流れに変更し、リターンガイド２４の入口通路２４ａに導く役割を持っている。 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.
　図１１ならびに図１２に示すとおり、クロスオーバーリターン２２の形状は、第１の羽根車１４側からリターンガイド２４側にかけて連なる複数枚の翼で形成されたリターンディフューザ２２ａと、リターンディフューザ２２ａを通過した水２２ａ１を清流するタンデムディフューザ２２ｂを備えており、リターンディフューザ２２ａとタンデムディフューザ２２ｂの間に開口部２２ｃを設けている。 As shown in FIGS. 11 and 12, the shape of the crossover return 22 passed through the return diffuser 22a formed of a plurality of blades connected from the first impeller 14 side to the return guide 24 side and the return diffuser 22a. 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.
　この開口部２２ｃを設けて加圧水１４ｂを交差させてエネルギーを与える水の流れ２２ｄ（２２ｄ：図１０の破線矢印）により、図１０に示すような複数枚で形成される翼形状２２ｅに沿った流れとなり、剥離を生じない周方向に均一な流れ２２ｆを形成できポンプ効率の向上に繋げることが可能である。 A flow along a blade shape 22e formed by a plurality of sheets as shown in FIG. 10 by a water flow 22d (22d: broken line arrow in FIG. 10) in which the opening 22c is provided and the pressurized water 14b is crossed to give energy. Therefore, a uniform flow 22f can be formed in the circumferential direction without peeling, which can lead to improvement in pump efficiency.
　つまり、電動機１と、電動機１で回転駆動される羽根車（１４、１５）と、羽根車（１４、１５）の外周を覆うように位置すると共に外郭でポンプ室を形成するケーシング３と、を有し、羽根車（１４、１５）の回転により渦巻きポンプ作用を行うポンプ装置において、電動機１は、ケーシング３に対してポンプ室側とは反対側の背面側に位置し、羽根車部は、ガイドカバー２１と、第１の羽根車１４と、クロスオーバーリターン２２と、シャフトスペーサ２３と、リターンガイド２４と、第２の羽根車１５と、を有し、クロスオーバーリターン２２は、リターンディフューザ２２ａと、タンデムディフューザ２２ｂを備えることにより、周方向に均一な流れを形成でき、水圧不足を解決するためにポンプ効率に優れる多段渦巻きポンプ装置を提供することができる。 That is, the electric motor 1, the impellers (14, 15) that are rotationally driven by the electric motor 1, and the casing 3 that is located so as to cover the outer periphery of the impeller (14, 15) and forms a pump chamber in the outer shell. In a pump device that has and performs a centrifugal pump operation by rotating the impellers (14, 15), 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. 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.
　なお、リターンディフューザ２２ａは、クロスオーバーリターン２２における外周側に位置する。タンデムディフューザ２２ｂはクロスオーバーリターン２２における内周側に位置する。径方向に見て、リターンディフューザ２２ａはタンデムディフューザ２２ｂよりも、大半が外周側に位置し、一部が開口部２２ｃを挟み重なる。言い換えると、タンデムディフューザ２２の中心からある径の位置において、リターンディフューザ２２ａと開口部２２ｃとタンデムディフューザ２２ｂは周方向に存在する。隣り合う２つのリターンディフューザ２２ａ間に設けられるリターンディフューザ間流路の外周側の一端部側から入ってきた流体は、大半が、隣り合う２つのタンデムディフューザ２２ｂ間に設けられるタンデムディフューザ間流路の内周側の他端部側へと至る。 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. When viewed in the radial direction, 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. In other words, 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. Most of the fluid that has entered from one end side of the outer peripheral side of the flow path between the return diffusers provided between the two adjacent return diffusers 22a is the flow path between the tandem diffusers provided between the two adjacent tandem diffusers 22b. It reaches the other end side on the inner peripheral side.
　ただし、リターンディフューザ間流路を通る流体の一部は、１つのリターンディフューザ２２ａの他端部と１つのタンデムディフューザ２２ｂの一端部との間に位置する開口部２２ｃから、隣のタンデムディフューザ間流路（リターンディフューザ間流路）へと入る。これにより、翼形状に沿った流れとなり、剥離を生じない周方向に均一な流れ２２ｆを形成でき、ポンプ効率に優れる多段渦巻きポンプ装置を提供することができる。 However, a part of the fluid passing through the flow path between the return diffusers flows from the opening 22c located between the other end of one return diffuser 22a and one end of one tandem diffuser 22b to the adjacent tandem diffuser. Enter the road (flow path between return diffusers). As a result, the flow follows the blade shape, a uniform flow 22f can be formed in the circumferential direction without peeling, and a multi-stage centrifugal pump device having excellent pump efficiency can be provided.
　シャフトスペーサ２３は、第１の羽根車１４のボス後端１４ｄと、第２の羽根車１５のボス前端１５ｄとに接触し、第１の羽根車１４と第２の羽根車１５の距離を保つ効果を奏する。更に、クロスオーバーリターン２２に設けられたリターンディフューザ２２ａとタンデムディフューザ２２ｂの間の開口部２２ｃと、リターンガイド２４の入口通路２４ａを連通するように設けられ、リターンガイド２４の入口通路２４ａの流路壁２４ｂの一部として滑らかな流れになる効果をそうする。 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.
　リターンガイド２４は、クロスオーバーリターン２２からの吐出を第２の羽根車１５に導く。また、第２の羽根車１５の入口外周部１５ａとリターンガイド２４の内周部との隙間寸法δ２を０．２ｍｍ程度に狭めることで、第２の羽根車１５から吐出された加圧水１５ｂが圧力差によってクロスオーバーリターン２２側への戻り水１５ｃを極力減らす構造にもなっており、ネジ穴２４ｄにてケーシング３に固定される。 The return guide 24 guides the discharge from the crossover return 22 to the second impeller 15. Further, by narrowing the gap dimension δ2 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.
　第２の羽根車１５で再加圧された加圧水１５ｂは、ケーシング３に複数枚の翼で形成された静翼３ａにより清流され、ケーシング３のケース内に排出され、吐出口３ｂを経由して給水されるが、リターンガイド２４のケーシング３側の面と、ケーシング３に複数枚の翼で形成された静翼３ａとの、水密性が得られるように組付けされるのが望ましい。なお、ケーシング３の静翼３ａは、リターンガイド２４のケーシング３側に設けても良い。 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. Although 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.
　そこで、本発明の多段ポンプ装置では、リターンガイド２４の背面側に、ケーシング３の静翼３aの凹部３ｃに嵌合する凸部２４eを設けて両者を嵌合させることでラビリンス効果が生まれ水密性向上の効果をそうする。 Therefore, in the multi-stage pump device of the present invention, 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.
　また、凸部２４eと凹部３ｃを嵌合させることで、部品組立時の位置決めが容易になり組立作業の向上の効果もそうする。 Further, by fitting the convex portion 24e and the concave portion 3c, positioning at the time of assembling the parts becomes easy, and the effect of improving the assembly work is also so.
　１・・・電動機、２・・・回転軸、２ａ・・・Ｈカット形状、３・・・ケーシング、３ａ・・・静翼、３ｂ・・・吐出口、３ｃ・・・凹部、４・・・ケーシングカバー、４ａ・・・吸込口、４ｂ・・・流入水、５・・・ベース、６・・・圧力タンク、7・・・圧力スイッチ、１１・・・外郭カバー、１４・・・第１の羽根車、１４ａ・・・入口外周部、１４ｂ・・・加圧水、１４ｃ・・・加圧水の戻り、１４ｄ・・・ボス後端、１５・・・第２の羽根車、１５ａ・・・入口外周部、１５ｂ・・・加圧水、１５ｃ・・・加圧水の戻り、１５ｄ・・・ボス前端、２１・・・ガイドカバー、２１ａ・・・入口通路、２２・・・クロスオーバーリターン、２２ａ・・・リターンディフューザ、２２ａ１・・・リターンディフューザを通過した水、２２ｂ・・・タンデムディフューザ、２２ｃ・・・開口部、２２ｄ・・・交差させてエネルギーを与える水の流れ、２２ｅ・・・翼形状、２２ｆ・・・周方向に均一な流れ、２３・・・シャフトスペーサ、２４・・・リターンガイド、２４ａ・・・入口通路、２４ｂ・・・流路壁、２４ｃ・・・溝、２４ｄ・・・ネジ穴、２４e・・・凸部、２５・・・パッキン、４０・・・ネジ、１００・・・多段渦巻きポンプ装置、１０１・・・ポンプ部 1 ... Electric, 2 ... Rotating shaft, 2a ... H-cut shape, 3 ... Casing, 3a ... Static blade, 3b ... Discharge port, 3c ... Recess, 4, ...・ Casing cover, 4a ・ ・ ・ Suction port, 4b ・ ・ ・ Inflow water, 5 ・ ・ ・ Base, 6 ・ ・ ・ Pressure tank, 7 ・ ・ ・ Pressure switch, 11 ・ ・ ・ Outer cover, 14 ・ ・ ・ No. 1 impeller, 14a ... inlet outer periphery, 14b ... pressurized water, 14c ... pressurized water return, 14d ... boss rear end, 15 ... second impeller, 15a ... entrance Outer circumference, 15b ... pressurized water, 15c ... pressurized water return, 15d ... boss front end, 21 ... guide cover, 21a ... inlet passage, 22 ... crossover return, 22a ... Return diffuser, 22a1 ... Water that has passed through the return diffuser, 22b ... Tandem diffuser, 22c ... Opening, 22d ... Crossing and energizing water flow, 22e ... Wing shape, 22f ... uniform flow in the circumferential direction, 23 ... shaft spacer, 24 ... return guide, 24a ... inlet passage, 24b ... flow path wall, 24c ... groove, 24d ... screw Hole, 24e ... Convex part, 25 ... Packing, 40 ... Screw, 100 ... Multi-stage centrifugal pump device, 101 ... Pump part

Claims (4)

  1. 　電動機と、前記電動機で回転駆動され、リターンガイドを有する羽根車部と、前記羽根車部の外周を覆うように位置すると共に外郭でポンプ室を形成するケーシングと、を有し、前記電動機の回転軸の回転により渦巻きポンプ作用を行うポンプ装置において、
    　前記ケーシングは、凹部を備えた静翼を有し、
    　前記リターンガイドは、背面側に前記凹部と嵌合する凸部を有することを特徴とするポンプ装置。     It has an electric motor, an impeller portion that is rotationally driven by the electric motor and has a return guide, and a casing that is located so as to cover the outer periphery of the impeller portion and forms a pump chamber in the outer shell. In a pump device that performs centrifugal pumping action by rotating the shaft
    The casing has a stationary wing with a recess and
    The return guide is a pump device having a convex portion that fits with the concave portion on the back surface side.
  2. 　電動機と、該電動機で回転駆動される羽根車部と、該羽根車部の外周を覆うように位置すると共に外郭でポンプ室を形成するケーシングと、を有し、前記羽根車部の回転により渦巻きポンプ作用を行うポンプ装置において、
    　前記電動機は、前記ケーシングに対してポンプ室側とは反対側の背面側に位置し、
    　前記羽根車部は、ガイドカバーと、第１の羽根車と、クロスオーバーリターンと、シャフトスペーサと、リターンガイドと、第２の羽根車と、を有し、
    　前記クロスオーバーリターンは、リターンディフューザと、タンデムディフューザを備え、
    　前記リターンディフューザと前記タンデムディフューザの間に開口部を有することを特徴とする多段渦巻きポンプ装置。     It has an electric motor, an impeller portion that is rotationally driven by the electric motor, and a casing that is located so as to cover the outer periphery of the impeller portion and forms a pump chamber in the outer shell, and is swirled by the rotation of the impeller portion. In a pump device that performs pumping action
    The motor is located on the back side of the casing opposite to the pump chamber side.
    The impeller portion includes a guide cover, a first impeller, a crossover return, a shaft spacer, a return guide, and a second impeller.
    The crossover return includes a return diffuser and a tandem diffuser.
    A multi-stage centrifugal pump device characterized by having an opening between the return diffuser and the tandem diffuser.
  3. 　前記シャフトスペーサは、
    　前記第１の羽根車の後端と、前記第２の羽根車の前端とに接触することを特徴とする請求項２に記載の多段渦巻きポンプ装置。     The shaft spacer is
    The multi-stage centrifugal pump device according to claim 2, wherein the rear end of the first impeller and the front end of the second impeller come into contact with each other.
  4. 　前記クロスオーバーリターンの開口と前記リターンガイドの開口を連通するように設けられることを特徴とする請求項２又は３に記載の多段渦巻きポンプ装置。 The multi-stage centrifugal pump device according to claim 2 or 3, wherein the crossover return opening and the return guide opening are provided so as to communicate with each other.
PCT/JP2020/033018 2020-02-28 2020-09-01 Pump device WO2021171658A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2020032580A JP7194705B2 (en) 2020-02-28 2020-02-28 Multistage centrifugal pump device
JP2020032578A JP2021134738A (en) 2020-02-28 2020-02-28 Multi-stage vortex pump device
JP2020-032580 2020-02-28
JP2020-032578 2020-02-28

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122800A (en) * 1982-12-28 1984-07-16 Matsushita Electric Ind Co Ltd Electric blower
JPS6036702A (en) * 1983-08-10 1985-02-25 Ebara Corp Multi-stage turbo machine
JPH06193585A (en) * 1992-10-15 1994-07-12 Man Gutehoffnungshuette Ag Multispindle turbocompressor with gear having return stage and radial expander
US20010036404A1 (en) * 1993-10-18 2001-11-01 Yoshihiro Nagaoka Centrifugal fluid machine
JP2015143475A (en) * 2014-01-31 2015-08-06 日立アプライアンス株式会社 Pump system
WO2019176426A1 (en) * 2018-03-15 2019-09-19 株式会社日立製作所 Centrifugal pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122800A (en) * 1982-12-28 1984-07-16 Matsushita Electric Ind Co Ltd Electric blower
JPS6036702A (en) * 1983-08-10 1985-02-25 Ebara Corp Multi-stage turbo machine
JPH06193585A (en) * 1992-10-15 1994-07-12 Man Gutehoffnungshuette Ag Multispindle turbocompressor with gear having return stage and radial expander
US20010036404A1 (en) * 1993-10-18 2001-11-01 Yoshihiro Nagaoka Centrifugal fluid machine
JP2015143475A (en) * 2014-01-31 2015-08-06 日立アプライアンス株式会社 Pump system
WO2019176426A1 (en) * 2018-03-15 2019-09-19 株式会社日立製作所 Centrifugal pump

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