WO2022166203A1 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
WO2022166203A1
WO2022166203A1 PCT/CN2021/117957 CN2021117957W WO2022166203A1 WO 2022166203 A1 WO2022166203 A1 WO 2022166203A1 CN 2021117957 W CN2021117957 W CN 2021117957W WO 2022166203 A1 WO2022166203 A1 WO 2022166203A1
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WO
WIPO (PCT)
Prior art keywords
impeller
assembly
centrifugal pump
axial
support
Prior art date
Application number
PCT/CN2021/117957
Other languages
English (en)
Chinese (zh)
Inventor
朱世军
连勇斌
蒋焱
Original Assignee
钱江集团温岭正峰动力有限公司
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 CN202110157911.5A external-priority patent/CN114857034A/zh
Priority claimed from CN202120325563.3U external-priority patent/CN214660925U/zh
Application filed by 钱江集团温岭正峰动力有限公司 filed Critical 钱江集团温岭正峰动力有限公司
Publication of WO2022166203A1 publication Critical patent/WO2022166203A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • 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
    • F04D29/02—Selection of particular materials
    • 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
    • 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
    • F04D29/08—Sealings
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for 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
    • F04D29/40—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 application relates to the technical field of centrifugal pumps, in particular to a multi-stage centrifugal pump for deep wells with high rotational speed and high lift.
  • the centrifugal pump for deep well generally includes a motor assembly and a pump body assembly including an impeller driven to rotate by a pump shaft.
  • the pump shaft speed of the traditional centrifugal pump is generally around 3000rpm. If the head of the water output by the centrifugal pump reaches 300m, the height of the centrifugal pump may reach 3m. Therefore, this kind of deep well pump is large and heavy.
  • Centrifugal pumps for deep wells are mostly used for agricultural irrigation, and the operating environment is usually at a depth ranging from 100m to 500m underground. In applications with harsh natural environments such as mountains, it is very inconvenient to operate. In particular, for the handling of centrifugal pumps alone, workers need to manually lift to the top of the mountain, which may take several hours, or even a day, to install the huge and cumbersome centrifugal pump to the bottom of the well hundreds of meters deep and the subsequent Possible repairs are very difficult. This largely limits the application of centrifugal pumps.
  • the purpose of the present application is to provide a centrifugal pump for deep wells with high power and high head, but with reduced volume and weight.
  • the present application provides a centrifugal pump, comprising a pump sleeve and a plurality of impeller stages housed in the pump sleeve, each impeller stage group comprising: a pump shaft driven by a pump shaft of the centrifugal pump to rotate therewith An impeller assembly, an impeller axial support assembly that surrounds the lower half of the impeller assembly and provides axial support, and a support body assembly that surrounds and provides support to the upper half of the impeller assembly, the impeller axial support assembly Mechanically connected with the support body assembly to form an impeller cavity for accommodating the impeller assembly, wherein:
  • the impeller assembly includes an impeller hub defining an impeller hub for engagement with the pump shaft, an impeller extending radially outwardly from the impeller hub, and an impeller seat attached to a radially outer periphery of the impeller, the lower end face of the impeller hub having a lower end surface attached to define the impeller hub. anti-wear attachments out of the rotating joint surface,
  • the impeller axial support assembly includes an outer casing mechanically connected to the support assembly and attached to the pump sleeve, an inner casing surrounding a portion of the outer peripheral surface of the impeller hub, and an outer casing connected to the inner casing guide vanes between, and a stationary support attached to the inner housing, the stationary support including a stationary engagement surface that engages the rotating engagement surface so that axial forces of the impeller assembly are transmitted to the inner housing and then to the pump sleeve.
  • the anti-wear attachment is embedded in a groove formed on the lower end face of the impeller hub, or attached to at least a portion of the lower end face of the impeller hub.
  • the anti-wear attachment is a tungsten steel ring.
  • the stationary support is attached to the inner housing directly or via an intermediate piece.
  • the stationary support is a ceramic ring.
  • the impeller and impeller seat define an impeller passage
  • the outer casing, inner casing and guide vanes define a flow guide passage in fluid communication with the impeller passage.
  • the impeller includes a tapered portion extending radially outward from an axial position of the outer peripheral surface of the impeller hub and expanding upward in the axial direction, and a tapered portion extending from the tapered portion.
  • the lower surface is a helically extending blade, and the impeller seat is attached to the radially outer periphery of the blade.
  • the angle between the lower surface and the axial direction is between 40° and 70°.
  • the outer casing of the impeller axial support assembly is joined to the impeller seat by an intermediate ring, the intermediate ring including an axial extension extending generally in the axial direction and transverse to the axial extension from Its radially outwardly extending radially extending portion is located radially inside the impeller seat and defines a first space therebetween, and the radially extending portion is located at the radially inner portion of the impeller seat.
  • a second space is defined below and between the two.
  • the radially outermost end of the vane seat of the impeller of each impeller stage and the corresponding support member assembly define an annular gap through which impurities in the water can pass.
  • the plurality of impeller stages includes a first impeller stage closest to the motor assembly of the centrifugal pump, the impeller axial support assembly corresponding to the first impeller stage is an inlet seat assembly, The support body assembly of the first impeller stage is radially connected to the vane cavity assembly of the adjacent impeller stage above it.
  • the plurality of impeller stages includes other impeller stages located above the first impeller stage, and the impeller axial support assemblies corresponding to the other impeller stages are guide vane cavity assemblies.
  • the pump shaft is a six-toothed pump shaft comprising six key teeth distributed in the circumferential direction.
  • the axial force borne by the impeller assembly in each impeller stage group is transmitted to the guide vane cavity assembly through the impeller, and then to the pump sleeve, and will not be superimposed on the adjacent impeller stage group below. , there will be no superposition of axial force, which reduces the loss of pump efficiency and pump power. Under the condition of achieving the same head, the height and weight of the pump are reduced by about two-thirds, which greatly improves the application breadth and ease of the centrifugal pump.
  • FIG. 1 is a longitudinal cross-sectional view of an exemplary centrifugal pump of the present application
  • Fig. 2 is a partial exploded view of the centrifugal pump of Fig. 1;
  • FIG. 3 is an enlarged view of an impeller assembly and a guide vane cavity assembly of a second impeller stage of the centrifugal pump of FIG. 1;
  • FIG. 4 is a cross-sectional view of a pump shaft of an exemplary centrifugal pump of the present application.
  • a centrifugal pump includes a motor assembly 10 and a pump body assembly 20 .
  • the motor assembly 10 includes a motor housing and a motor, such as an electric motor, accommodated in the motor housing and capable of outputting a high rotational speed.
  • Auxiliary systems that provide auxiliary functions for the operation of the motor, such as cooling systems, are also located within the motor housing.
  • the pump body assembly 20 includes a pump sleeve 22 and a plurality of impeller stages housed within the pump sleeve 22 .
  • the output shaft of the motor drives the impellers of each impeller stage group in the centrifugal pump to rotate through the pump shaft 11 of the centrifugal pump.
  • the pump shaft 11 adopts a six-tooth pump shaft
  • FIG. 4 shows an enlarged cross-sectional view of the pump shaft 11 , wherein the pump shaft 11 includes a body 111 and uniformly arranged from the outer peripheral surface of the body 111 Six protrusions 113 .
  • the direction in which the pump shaft 11 extends is defined as an axial direction, and the circumferential direction extends around the axial direction.
  • the centrifugal pump of the present application is usually placed vertically during use, so the axial direction is also referred to as the vertical direction, the direction/end toward the motor assembly 10 in the axial direction is referred to as the lower/lower end, and the opposite direction/end The part is called the upper/upper end.
  • the direction from the pump sleeve 22 toward the central axis of the pump shaft 11 is referred to as radially inward, and on the contrary, from The direction of the central axis of the pump shaft 11 toward the pump sleeve 22 is referred to as radially outward.
  • the pump body assembly 20 sequentially includes a water inlet section 30 , an impeller section 50 composed of a plurality of impeller stages, and a water outlet section 40 .
  • the pump sleeve 22 is provided with water inlet holes 32 distributed in the circumferential direction, and, in the water inlet section 30 , a conical housing 34 is provided in the pump sleeve 22 .
  • the cone housing 34 is configured as an inverted cone open towards the motor assembly 10 and includes a central hole allowing the pump shaft 11 to pass through.
  • the pump shaft connection that connects the pump shaft 11 to the output shaft of the motor assembly 10 and supports the pump shaft 11 is provided in the space 33 formed by the inner surface 37 of the cone housing 34 facing the motor assembly 10 .
  • the opposite outer surface 39 of the cone housing 34 and the pump sleeve 22 define a water inlet space 35 in fluid communication with the water inlet hole 32 for receiving water entering via the water inlet hole 32 from outside the centrifugal pump.
  • the water inlet holes 32 include a plurality of water inlet hole groups that are spaced apart along the circumferential direction of the pump sleeve 22, and each water inlet hole group includes a plurality of water inlet holes that are densely distributed.
  • impeller stage group located at the lowermost position of the centrifugal pump adjacent to the water inlet section 30 is referred to as the first impeller stage group, denoted by reference numeral B1; other impeller stage groups except the first impeller stage group Known as other impeller stage groups, designated by reference numerals B2-B5.
  • each impeller stage group includes an impeller assembly 100 driven by the pump shaft 11 to rotate together, a guide vane cavity assembly 200 surrounding the lower half of the impeller assembly 100 and providing axial support, and surrounding the impeller assembly 100 The upper part of the support body assembly 300 that provides support for it.
  • the first impeller stage group B1, that is, the lowermost impeller stage group has a slightly different structure because it is adjacent to and connected to the water inlet section 30 of the pump body assembly 20.
  • the impeller assembly 100 of the first impeller stage group B1 also includes a surrounding The difference of the upper half of the support body assembly 300 is that the lower half of the impeller assembly 100 is axially supported by the inlet seat assembly 200 ′ whose structure is slightly different from the above-mentioned guide vane cavity assembly 200 .
  • each impeller stage group B1-B5 of the centrifugal pump of the present application includes an impeller assembly 100, a support body assembly 300 and an impeller axial support assembly 200 or 200'.
  • each impeller stage its support body assembly 300 and impeller axial support assembly are mechanically connected together to form an impeller cavity that accommodates and supports the impeller stage 100 .
  • the support body assembly 300 of each impeller stage is mechanically connected to the impeller axial support assembly 200 or 200' of the adjacent impeller stage above it, so that the impeller stages are mechanically connected together.
  • the impeller assembly 100 defines an impeller passage 125 (see FIG. 3 ) that allows water to flow therethrough, and the impeller axial support assembly 200 or 200 ′ defines a flow guide passage in fluid communication with the impeller passage 125 . 225 ( Figure 3).
  • each impeller stage is in fluid communication with the guide passages 225 of the adjacent impeller stage above it, thereby forming a continuous water flow passage throughout the impeller section 50 .
  • the impeller assemblies 110 and the impeller axial support assemblies 200 or 200' of all impeller stage groups B1-B5 together define the water flow channel.
  • the water outlet section 40 located at the opposite end of the water inlet section 30 includes the uppermost guide vane cavity assembly 410 connected to the support body assembly 300 of the last impeller stage B5, and a single vane cavity assembly 410 mounted on the guide vane cavity assembly 410.
  • Valve assembly 420, and outlet seat assembly 430 (shown in FIG. 1) attached to pump sleeve 22 and defining outlet 432
  • FIG. 3 is a cross-sectional view illustrating the joint structure of the impeller assembly 100 and the impeller axial support assembly 200 in an enlarged form by taking the second impeller stage group B2 as an example.
  • the joint structure of the impeller assembly 100 and the impeller axial support assembly 200 described below with respect to the second impeller stage set B2 is applicable to all other impeller stages of the centrifugal pump, including the first impeller stage set B1 .
  • the structure of the impeller assembly 100 and the support assembly 300 is the same for all impeller stages of the centrifugal pump.
  • the impeller assembly 100 mainly includes an impeller hub 110 , an impeller 120 and an impeller seat 130 .
  • the impeller hub 110 is generally cylindrical and defines a shaft hole 112 that allows the pump shaft 11 of the centrifugal pump to pass through and engage therewith.
  • the impeller hub 110 and the pump shaft 11 can be engaged by a keying manner, and the keyway in the shaft hole 112 is schematically shown in FIG. 3 .
  • the impeller 120 includes a tapered portion 124 extending from an upper portion of the outer peripheral surface 114 of the impeller hub 110 , eg, from an axial position P in a radial direction outward, expanding upward in the axial direction, and a lower portion from the tapered portion 124 .
  • Surface 123 has helically extending vanes 126 .
  • the impeller seat 130 is located radially outside the impeller 120 and is circumferentially attached to the radially outer circumference or free end of the impeller 120 , in particular the blades 126 .
  • the impeller seat 130 includes an axial base 132 and a flared portion 134 extending radially outward from the axial base 132 and axially upward.
  • An impeller channel 125 allowing water to flow therethrough is formed between the impeller 120 and the impeller seat 130 .
  • the impeller 120 and the impeller hub 110 are integrally formed, and the impeller seat 130 is attached to the outer periphery of the impeller 120 for rotation with the impeller 120 in any manner known in the art.
  • the impeller hub 110, the impeller 120, and the impeller seat 130 may be separately formed and then attached together, or any two or three of them may be integrally formed.
  • the vanes 126 of the impeller 120 protrude from the lower surface 123 of the tapered portion 124 .
  • the angle between the lower surface 123 and the horizontal plane is between 20° and 50°, in other words, the angle between the lower surface 123 and the central axis Z is between 40° and 70°.
  • An anti-wear attachment 150 is attached to the lower end face of the impeller hub 110 .
  • the anti-wear attachment 150 may be attached and fixed to the lower end face of the impeller hub 110 in any suitable manner, including, but not limited to, interference fit, connection with fasteners, and any other connection manner known in the art.
  • the anti-wear attachment 150 is embedded in a groove formed on the lower end face of the impeller hub 110 .
  • the lower end face 152 of the anti-wear attachment 150 provides a rotational interface with which the impeller axial support assembly 200 is engaged.
  • the anti-wear attachment 150 may be attached to a portion of the lower end face of the impeller hub 110 or cover the entire lower end face of the impeller hub 110 .
  • the impeller axial support assembly 200 includes an outer housing 210 adapted to mechanically engage and attach to the pump sleeve 22 of a support assembly 300 (not shown in FIG. 3 ) of the impeller stage, and a lower casing surrounding the impeller stage 100 .
  • the middle piece 240 is fixedly attached to the inner housing 220
  • the stationary support base 250 that directly contacts and supports the impeller assembly 100 is attached to the middle piece 240 and remains stationary during operation of the centrifugal pump verb: move.
  • the intermediate piece 240 and the stationary support 250 define shaft holes 242 and 252, respectively, that allow the pump shaft to pass through.
  • the stationary support 250 includes an upper surface 254 to serve as a stationary engagement surface for contact with the rotational engagement surface provided by the lower end surface 152 of the anti-wear attachment 150 described above.
  • the anti-wear attachment 150 and the stationary support 250 form a dynamic sealing engagement between the contacting surfaces, preventing water in the water flow channel from entering the pump through the axial gap 270 between the inner housing 220 and the impeller hub 110 of the impeller assembly 110 shaft hole.
  • the anti-wear attachment 150 may be formed of a tungsten steel material
  • the stationary support seat 250 may be formed of a ceramic material.
  • the selection of these two materials enables friction between the relatively moving anti-wear attachment 150 and the stationary support seat 250 least resistance.
  • all the notches 262 are evenly distributed along the circumferential direction.
  • the arrangement of the notches 262 avoids or greatly reduces the wear resistance of the anti-wear accessories 150 and the wear resistance caused by the high-speed rotation.
  • the molecular binding force generated by the vacuum formed between the stationary stationary supports 250 greatly reduces the power loss of the centrifugal pump and improves the efficiency of the pump.
  • the outer housing 210 of the impeller axial support assembly 200 is joined to the axial base 132 of the impeller seat 130 of the impeller assembly 100 through an intermediate ring 280 .
  • the intermediate ring 280 includes an axial extension 282 extending generally in the axial direction and a radial extension 284 extending radially outward therefrom transverse to the axial extension 282 .
  • a first space 292 is defined between the axially extending portion 282 and the axial base portion 132 of the impeller seat 130 .
  • a second space 294 is defined between the radial extension 284 and the axial base 132 . The width of the first space 292 in the radial direction is smaller than the width of the second space 294 in the axial direction.
  • the second space 294 may play a role of pressure equalization. Specifically, during the operation of the centrifugal pump, the water from the space radially outside the impeller seat 130 trying to intrude into the water flow channel via the second space 294 and the first space 292 is greatly reduced in speed after entering the second space 294, so that it will not continue Entering the first space 292 , ie, most, if not all, water is blocked in the second space 294 . At the same time, under the action of centrifugal force, the water in the second space 294 is thrown out, thereby forming an internal water pressure that opposes the external water pressure, so that the impeller 120 may not bear the radial force generated by the water.
  • the above-mentioned water pressure balance also keeps the impeller assembly 100, specifically, the impeller seat 130 and the outer casing 210 in a "sealed” state all the time, and the seal will not fail due to the high-speed rotation of the impeller.
  • the impeller assembly 100 is assembled in the axial impeller cavity formed by the support member assembly 300 and the impeller axial support assembly 200 .
  • the lower end face 152 of the anti-wear attachment 150 is in axial contact with the upper end face 254 of the stationary support 250 , and the impeller axial support assembly 200 axially supports the impeller assembly 110 and the support assembly 300 .
  • the impeller assembly 100 In the operating state of the centrifugal pump, the impeller assembly 100 is driven by the pump shaft 11 to rotate at a high speed in the axial impeller cavity, and the water is confined from the impeller axial support assembly 200 under the action of the suction force generated by the rotation of the impeller 120 .
  • the guide channel 225 is sucked into the impeller channel 125 of the impeller 120 and then thrown into the guide channel 225 of the next impeller stage.
  • the lower end surface 152 of the anti-wear attachment 150 rotating with the impeller assembly 100 at a high speed is in axial contact with the upper end surface 254 of the stationary stationary support 250 and is in sealing combination, and any axial force on the impeller assembly 120 is transmitted.
  • any surface treatment measures may be applied to the end faces 152 and 254 in contact with each other.
  • an anti-friction coating may be applied to the end faces 152 and 254 .
  • tungsten steel and ceramic materials are selected to form the anti-wear attachment 150 and stationary support 250, respectively, to minimize frictional resistance and molecular binding resistance developed on the two surfaces.
  • the end 134a of the flared portion 134 of the impeller seat 130 of the impeller assembly 100 and the support body assembly 300 define an annular gap 80 (see FIG. 1 ) that allows impurities in the water, such as sediment, to settle down. .
  • the sediment in the water flow in the impeller channel 125 passes through the annular gap 80 and then enters the impurity collection space 90 defined by the support member 300 of the impeller stage 100 , the outer casing 220 of the impeller axial support assembly 200 and the impeller seat 130 .
  • the axial force experienced by the impeller assembly 100 in each impeller stage is caused by the axial engagement of the lower end face 152 of the anti-wear attachment 150 with the upper end face 254 of the stationary support seat 250 of the impeller axial support assembly 200 . pass to the impeller axial support assembly 200 (or the inlet seat assembly for the first impeller stage set B1), and then to the pump sleeve 22, without being superimposed on the adjacent impeller stage set below, which would not Increasing the axial force borne by the lower impeller stage group will not produce the superposition of axial force.
  • Such an arrangement reduces pump power losses due to rotational friction created by the superposition of axial forces of the impeller assembly 100 .
  • the corresponding surface treatment of the above-mentioned contact end face or the selection of specific materials can further reduce the lost pump power and improve the working efficiency of the pump.
  • the centrifugal pump of the present application adopts a motor structure assembly with an output speed of up to 12,000 or higher, and adopts the pump body assembly structure as schematically shown in the figure. It only needs to configure 5 impeller stages, and a water output of about 300m can be obtained. lift. At this time, the total height of the centrifugal pump is only about 1m. Even if the controller of the centrifugal pump is accommodated inside the centrifugal pump, the overall height of the centrifugal pump is only about 1.5 m. Compared with the traditional centrifugal pump for deep wells, the height of the pump is shortened by one-half to two-thirds, which means that the weight of the centrifugal pump is greatly reduced. Such a structure makes the application of the deep well centrifugal pump wider, simpler and easier.

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

Abstract

L'invention concerne une pompe centrifuge, comprenant un ensemble corps de pompe (20), l'ensemble corps de pompe (20) comprenant un manchon de pompe (22) et une pluralité d'ensembles d'étages de turbine (B1-B5) ; chaque ensemble d'étage de turbine comprenant un ensemble corps de support (300), un ensemble cavité d'aube directrice (200), et un ensemble turbine (100) ; l'ensemble turbine (100) comprenant un moyeu de turbine (110), une turbine (120) et un logement de turbine (130) ; une face d'extrémité inférieure du moyeu de turbine (110) étant fixée à un accessoire anti-usure (150) délimitant une face de joint rotatif (152) ; un ensemble de support axial de turbine (200 ou 200') comprenant une enveloppe externe (210), une enveloppe interne (220), une aube directrice (230) reliée entre l'enveloppe externe (210) et l'enveloppe interne (220), et un élément de support fixe (250) fixé à l'enveloppe interne (220) ; et l'élément de support fixe (250) comprenant une face de joint fixe (254) reliée à la face de joint rotatif (152) de sorte qu'une force axiale de l'ensemble turbine (100) soit transférée vers l'enveloppe interne (220) et ensuite vers le manchon de pompe (22).
PCT/CN2021/117957 2021-02-04 2021-09-13 Pompe centrifuge WO2022166203A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202110157911.5A CN114857034A (zh) 2021-02-04 2021-02-04 离心泵
CN202110157911.5 2021-02-04
CN202120325563.3 2021-02-04
CN202120325563.3U CN214660925U (zh) 2021-02-04 2021-02-04 离心泵

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WO2022166203A1 true WO2022166203A1 (fr) 2022-08-11

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PCT/CN2021/117957 WO2022166203A1 (fr) 2021-02-04 2021-09-13 Pompe centrifuge

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WO (1) WO2022166203A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29722288U1 (de) * 1997-12-17 1998-01-29 Grundfos As Mehrstufige Unterwasserpumpe
US20060269404A1 (en) * 2005-05-26 2006-11-30 Franklin Electric Co., Inc. Multistage pump
CN101649839A (zh) * 2009-09-05 2010-02-17 江苏大学 每级叶轮有两个推力轴承副的深井离心泵
CN202194835U (zh) * 2011-06-18 2012-04-18 温岭市振圣机械有限公司 防砂深井泵
CN203420907U (zh) * 2013-09-06 2014-02-05 浙江大福泵业有限公司 具有抗沙功能的深井潜水电泵
CN203430807U (zh) * 2013-09-09 2014-02-12 浙江大福泵业有限公司 抗沙型深井潜水电泵
CN113279968A (zh) * 2021-06-23 2021-08-20 温岭正峰数字机电科技有限公司 一种叶轮泵
CN214366878U (zh) * 2021-02-04 2021-10-08 温岭正峰数字机电科技有限公司 用于离心泵的叶轮

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29722288U1 (de) * 1997-12-17 1998-01-29 Grundfos As Mehrstufige Unterwasserpumpe
US20060269404A1 (en) * 2005-05-26 2006-11-30 Franklin Electric Co., Inc. Multistage pump
CN101649839A (zh) * 2009-09-05 2010-02-17 江苏大学 每级叶轮有两个推力轴承副的深井离心泵
CN202194835U (zh) * 2011-06-18 2012-04-18 温岭市振圣机械有限公司 防砂深井泵
CN203420907U (zh) * 2013-09-06 2014-02-05 浙江大福泵业有限公司 具有抗沙功能的深井潜水电泵
CN203430807U (zh) * 2013-09-09 2014-02-12 浙江大福泵业有限公司 抗沙型深井潜水电泵
CN214366878U (zh) * 2021-02-04 2021-10-08 温岭正峰数字机电科技有限公司 用于离心泵的叶轮
CN113279968A (zh) * 2021-06-23 2021-08-20 温岭正峰数字机电科技有限公司 一种叶轮泵

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