WO2023151114A1 - Structure de corps de pompe et pompe centrifuge la comprenant - Google Patents

Structure de corps de pompe et pompe centrifuge la comprenant Download PDF

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Publication number
WO2023151114A1
WO2023151114A1 PCT/CN2022/076989 CN2022076989W WO2023151114A1 WO 2023151114 A1 WO2023151114 A1 WO 2023151114A1 CN 2022076989 W CN2022076989 W CN 2022076989W WO 2023151114 A1 WO2023151114 A1 WO 2023151114A1
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WO
WIPO (PCT)
Prior art keywords
impeller
pump
pump body
cavity
body structure
Prior art date
Application number
PCT/CN2022/076989
Other languages
English (en)
Chinese (zh)
Inventor
杨丹飞
余伟平
滕新伟
张丹艺
何涛
Original Assignee
浙江水泵总厂有限公司
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
Application filed by 浙江水泵总厂有限公司 filed Critical 浙江水泵总厂有限公司
Publication of WO2023151114A1 publication Critical patent/WO2023151114A1/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
    • 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
    • F04D29/185—Rotors consisting of a plurality of wheels
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • 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
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present application relates to the technical field related to centrifugal pumps, in particular to a pump body structure and a centrifugal pump having the same.
  • the structure of the current multistage centrifugal pump is mostly divided into several parts according to the order of the liquid inlet end cover, multiple middle sections, pump body and suspension.
  • the impeller needs to be taken out for maintenance and repair, the liquid inlet end cover and After the impeller nut at the top of the main shaft is disassembled, the middle section and the impellers in the middle section are disassembled one by one from the side of the liquid inlet cover, so as to take out the impeller for subsequent maintenance.
  • liquid inlet cap is usually connected and fixed with the customer’s liquid inlet pipe, it is necessary to dismantle the liquid inlet pipe before removing the liquid inlet cap to ensure that the liquid inlet cap has enough space for disassembly.
  • most of the liquid inlet pipes are welded and fixed, it is difficult to remove, which leads to cumbersome disassembly and low efficiency when repairing and maintaining the impeller.
  • the present application provides a pump body structure, including a pump body, a pump cover, a suspension, a main shaft and an impeller;
  • the impeller cavity of the pump, the pump inlet and the pump outlet are both connected to the impeller cavity;
  • the pump cover is detachably arranged on the pump body, and can close the opening of the impeller cavity, and the suspension is set
  • the main shaft is arranged on the suspension, and passes through the pump cover to the impeller chamber;
  • the impeller is arranged on the main shaft and is located in the impeller chamber, and the impeller The diameter is smaller than the diameter of the opening of the impeller cavity.
  • the above-mentioned pump body structure by setting an impeller cavity with an opening diameter larger than the impeller diameter in the pump body, and setting the impeller in the impeller cavity, so that after the pump cover is removed, the main shaft and the impeller can be removed from the pump body together, no need Disassemble the liquid inlet pipeline connected to the pump inlet and mostly fixed by welding to reduce the difficulty of impeller disassembly and facilitate the maintenance of the impeller by the staff.
  • the impeller includes a primary impeller and a secondary impeller, and the liquid inlets of the primary impeller and the secondary impeller are in opposite directions.
  • the pump body structure further includes a guide assembly arranged on the inner wall of the impeller chamber, and a housing chamber is opened in the guide assembly, the main shaft passes through the housing chamber, and the secondary The first-stage impeller is located in the housing chamber, and the housing chamber has two openings, one of which corresponds to the pump outlet, and the other opening connects the liquid inlet of the secondary impeller and the impeller chamber.
  • the guide assembly can block the liquid outlet of the secondary impeller, thereby effectively avoiding energy loss or even turbulent flow caused by the collision of the liquid sent out from the liquid outlet of the secondary impeller and the primary impeller.
  • the flow guide assembly includes an impeller baffle, and the impeller baffle is connected to the inner wall of the impeller cavity to separate the impeller cavity into a primary impeller cavity and a secondary impeller cavity, the The primary impeller and the secondary impeller are respectively located in corresponding cavities, and the pump body is also provided with a through hole communicating the primary impeller cavity and the secondary impeller cavity.
  • the through hole and the pump outlet are arranged symmetrically with the main shaft as the center, and the end of the through hole communicating with the cavity of the first stage impeller faces the liquid outlet of the first stage impeller.
  • the pumped liquid flowing out of the first-stage impeller into the first-stage impeller chamber can flow to the secondary impeller chamber along the through hole, avoiding the pumping liquid flowing out of the liquid outlet of the first-stage impeller directly from the pump outlet Situation happens.
  • the deflector assembly further includes a deflector arranged on the impeller baffle and located in the secondary impeller cavity, and the deflector is formed between the impeller baffle and the impeller baffle.
  • the pumped liquid flowing out along the through hole can be smoothly delivered to the liquid inlet of the secondary impeller along the guide passage, thereby reducing energy loss or turbulent flow caused by collision.
  • the inner wall of the impeller cavity has an annular protrusion
  • the inner end surface of the annular protrusion has a stepped surface facing the side of the pump cover
  • the impeller baffle abuts against the stepped surface
  • the diameter of the first-stage impeller is smaller than the inner diameter of the annular protrusion
  • annular protrusion can act as abutment against the impeller baffle, thereby achieving the effect of limiting the freedom of movement of the impeller baffle and increasing its fixing firmness.
  • the end surface of the pump cover near the pump body has a stepped protrusion, and the stepped protrusion can abut against the inner wall of the impeller chamber.
  • the pump body structure further includes a support seat, and the support seat is respectively fixed to two ends of the pump body with the main shaft as the center.
  • the two-point support of the support seat can increase the support stability of the pump body, thereby making the operation of the centrifugal pump more stable.
  • the second aspect of the present application provides a centrifugal pump, which includes the pump body structure described in any one of the above embodiments.
  • FIG. 1 is a schematic cross-sectional structure diagram of a centrifugal pump of the present application in the front view direction.
  • FIG. 2 is a schematic diagram of an enlarged structure at point A in FIG. 1 .
  • Fig. 3 is a left view structural diagram of the centrifugal pump of the present application.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • a first feature is “on” or “under” a second feature, which means that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact with each other. contact through an intermediary.
  • “above”, “above” and “above” the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or it just means that the first feature is higher in level than the second feature.
  • “Below”, “beneath” and “under” the first feature may mean that the first feature is directly below or obliquely below the second feature, or it just means that the level of the first feature is smaller than that of the second feature.
  • the structure of the current multistage centrifugal pump is mostly divided into several parts according to the order of the liquid inlet end cover, multiple middle sections, pump body and suspension.
  • the impeller needs to be taken out for maintenance and repair, the liquid inlet end cover and After the impeller nut at the top of the main shaft is disassembled, the middle section and the impellers in the middle section are disassembled one by one from the side of the liquid inlet cover, so as to take out the impeller for subsequent maintenance.
  • liquid inlet cap is usually connected and fixed with the customer’s liquid inlet pipe, it is necessary to dismantle the liquid inlet pipe before removing the liquid inlet cap to ensure that the liquid inlet cap has enough space for disassembly.
  • most of the liquid inlet pipes are welded and fixed, it is difficult to remove, which leads to cumbersome disassembly and low efficiency when repairing and maintaining the impeller.
  • the impeller is arranged in the corresponding middle section, and the middle section is fixed between the pump body and the liquid inlet cover, when it is only necessary to take out the main shaft or the bearing for maintenance, it is also necessary to remove it from the side of the liquid inlet cover first. Remove the impeller, and then disassemble the main shaft and bearing from the side of the suspension; otherwise, when the main shaft is disassembled, the main shaft will be unable to move from the impeller and the middle section due to the contact interference between the impeller and the middle section and the middle section and the pump body. Take out the suspension side.
  • the pump body structure includes a pump body 10, a pump cover 20, a suspension 30, a main shaft 40 and an impeller 50; It has a pump inlet 11 and a pump outlet 12.
  • the pump body 10 is also provided with an impeller chamber 13 that opens to the side away from the pump inlet 11.
  • the main shaft 40 can be connected to the impeller 50 from the pump body 10. Removed, do not need to disassemble the liquid inlet pipeline connected to the pump inlet 11 and mostly welded and fixed, to reduce the difficulty of disassembling the impeller 50, and facilitate the inspection and maintenance of the impeller 50 by the staff.
  • the impeller 50 includes a primary impeller 51 and a secondary impeller 52 , and the liquid inlets of the primary impeller 51 and the secondary impeller 52 are facing oppositely; the opening of the impeller 50 along the axial direction of the main shaft 40 is the liquid inlet, the opening along the radial direction of the main shaft 40 is the liquid outlet, the liquid inlet of the primary impeller 51 faces the pump inlet 11 , and the liquid inlet of the secondary impeller 52 faces the pump cover 20 .
  • the liquid inlets of the primary impeller 51 and the secondary impeller 52 face opposite directions, so that when the main shaft 40 rotates, the axial forces generated by the primary impeller 51 and the secondary impeller 52 rotate in opposite directions and can cancel each other out, thereby reducing the main shaft
  • the axial vibration of 40 increases the running stability of the centrifugal pump.
  • the pump body structure also includes a flow guide assembly 60 arranged on the inner wall of the impeller chamber 13 , the flow guide assembly 60 is provided with an accommodating chamber 61 , the main shaft 40 runs through the accommodating chamber 61 , and the secondary impeller 52 Located in the housing chamber 61, the housing chamber 61 has two openings, one of which corresponds to the pump outlet 12, and the other opening is connected to the liquid inlet of the secondary impeller 52 and the impeller chamber 13, and the flow guiding assembly 60 can move the primary impeller 51 The liquid flowing out of the liquid outlet is guided to the liquid inlet of the secondary impeller 52 .
  • the flow guide assembly 60 can block the liquid outlet of the secondary impeller 52, so as to prevent the pumped liquid sent from the liquid outlet of the primary impeller 51 from flowing backward to the secondary impeller.
  • the outlet of the stage impeller 52; in addition, an opening communicated with the pump outlet 12 is provided through the housing cavity 61, so that the pumping liquid sent from the outlet of the secondary impeller 52 can directly flow out from the pump outlet 12 along the outlet, thereby It effectively avoids energy loss or even turbulent flow caused by the collision of the liquid sent out from the liquid outlet of the secondary impeller 52 and the primary impeller 51 .
  • the flow guide assembly 60 includes an impeller baffle 62 connected to the inner wall of the impeller chamber 13 to separate the impeller chamber 13 into a primary impeller chamber 131 and a secondary impeller chamber 132,
  • the primary impeller 51 and the secondary impeller 52 are respectively located in the corresponding cavity, and the pump body 10 is also provided with a through hole 14 communicating with the primary impeller cavity 131 and the secondary impeller cavity 132; further, the impeller baffle plate 62 and the impeller cavity 13
  • the inner wall is fixed.
  • the impeller cavity 13 is divided into the primary impeller cavity 131 and the secondary impeller cavity 132 by the impeller baffle plate 62, avoiding the situation that the pumping liquid flowing out from the liquid outlet of the primary impeller 51 flows directly from the pump outlet 12;
  • a through hole 14 connecting the primary impeller cavity 131 and the secondary impeller cavity 132 is provided in the pump body 10 to guide the flow direction of the pumped liquid, so that the pumping fluid flowing out from the primary impeller 51 to the primary impeller cavity 131
  • the liquid can flow to the secondary impeller chamber 132 along the through hole 14 , and guided by the guide assembly 60 to the liquid inlet of the secondary impeller 52 , and flow into the secondary impeller 52 .
  • the through hole 14 and the pump outlet 12 are arranged symmetrically with the main shaft 40 as the center, and the end of the through hole 14 communicating with the primary impeller chamber 131 faces the liquid outlet of the primary impeller 51 .
  • the central symmetrical setting can maximize the distance between the through hole 14 and the pump outlet 12, so as to avoid the situation that the pumped liquid flows into the secondary impeller cavity 132 along the through hole 14, and then directly flows out of the pump outlet 12, so as to ensure the flow into the secondary impeller cavity.
  • the pumped liquid in the impeller chamber 132 can be guided into the secondary impeller 52 under the guidance of the flow guide assembly 60 .
  • one end of the through-hole 14 communicated with the first-stage impeller chamber 131 faces the liquid outlet of the first-stage impeller 51, so that the liquid flowing out of the first-stage impeller 51 can flow into the through-hole 14 more smoothly, reducing the pressure caused by the pump. Energy loss or turbulent flow is caused by the collision between the delivery liquid and the inner wall of the first-stage impeller cavity 131 .
  • the deflector assembly 60 further includes a deflector 63 disposed on the impeller baffle 62 and located in the secondary impeller chamber 132 , and an accommodation cavity is formed between the deflector 63 and the impeller baffle 62 61 , the end surface of the deflector 63 toward the side of the pump cover 20 smoothly transitions to cooperate with the pump cover 20 to form a smooth guide passage 64 between the through hole 14 and the liquid inlet of the secondary impeller 52 .
  • the pumped liquid flowing out along the through hole 14 can be smoothly transported to the liquid inlet of the secondary impeller 52 along the guide passage 64, reducing pump pressure.
  • the collision with the inner wall of the secondary impeller cavity 132 or the outer wall of the secondary impeller 52 during the liquid delivery process reduces energy loss or turbulent flow.
  • the inner wall of the impeller chamber 13 has an annular protrusion 133
  • the inner end surface of the annular protrusion 133 has a stepped surface facing the side of the pump cover 20, and the impeller baffle 62 is in contact with the stepped surface.
  • the diameter of the stage impeller 51 is smaller than the inner diameter of the annular protrusion 133 .
  • the impeller baffle 62 may be fixed to the stepped surface, for example, the impeller baffle 62 is fixed to the annular protrusion 133 through bolts.
  • the end surface of the pump cover 20 close to the pump body 10 has a stepped protrusion 21, and the stepped protrusion 21 can abut against the inner wall of the impeller chamber 13; 13
  • the abutment between the inner walls can limit the displacement of the pump cover 20 along the radial direction of the main shaft 40, so as to achieve the effect of increasing the fixing firmness of the pump cover 20, thereby realizing the gap seal and increasing the sealing effect between the pump body and the pump cover .
  • the pump body structure also includes a support seat 70, and the support seat 70 is respectively fixed to both ends of the pump body 10 with the main shaft 40 as the center;
  • the support base 70 of the present application can increase the support stability of the pump body 10 through the form of two-point support, thereby making the operation of the centrifugal pump more stable.
  • the second aspect of the present application provides a centrifugal pump, which includes the above-mentioned pump body structure.

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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 une structure de corps de pompe et une pompe centrifuge la comprenant. La structure de corps de pompe comprend un corps de pompe (10), un couvercle de pompe (20), une suspension (30), un arbre principal (40) et une roue (50) ; le corps de pompe (10) comporte une entrée de pompe (11) et une sortie de pompe (12), et le corps de pompe (10) comporte en outre une cavité de roue (13) ayant une ouverture vers le côté à l'opposé de l'entrée de pompe (11), l'entrée de pompe (11) et la sortie de pompe (12) étant toutes deux en communication avec la cavité de roue (13) ; le couvercle de pompe (20) est agencé de manière amovible sur le corps de pompe (10) et peut sceller de manière étanche l'ouverture de la cavité de roue (13), la suspension (30) est agencée sur le couvercle de pompe (10), et l'arbre principal (40) est agencé sur la suspension (30) et pénètre à travers le couvercle de pompe (20) dans la cavité de roue (13) ; et la roue (50) est agencée sur l'arbre principal (40) et est située dans la cavité de roue (13), le diamètre de la roue (50) étant inférieur à celui de l'ouverture de la cavité de roue (13).
PCT/CN2022/076989 2022-02-10 2022-02-21 Structure de corps de pompe et pompe centrifuge la comprenant WO2023151114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210125312.XA CN114233635A (zh) 2022-02-10 2022-02-10 泵体结构及具有其的离心泵
CN202210125312.X 2022-02-10

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WO2023151114A1 true WO2023151114A1 (fr) 2023-08-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116576082A (zh) * 2023-07-14 2023-08-11 威晟汽车科技(宁波)有限公司 一种泵装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0664398A1 (fr) * 1994-01-21 1995-07-26 WILO GmbH Pompe centrifuge avec clapet de non-retour
CN2365428Y (zh) * 1999-03-09 2000-02-23 赵彤涌 直联式轴向吸入两级离心泵
CN101021213A (zh) * 2006-03-28 2007-08-22 姜万芝 多流道式叶轮离心泵
EP2060791A1 (fr) * 2007-11-13 2009-05-20 Pedrollo S.p.a. Pompe électrique centrifuge avec aspiration axiale
CN204327512U (zh) * 2014-11-20 2015-05-13 大连惠生泵业有限公司 立式双级自吸泵
CN206785748U (zh) * 2017-05-27 2017-12-22 沈阳启源工业泵制造有限公司 一种可快速拆装两级悬臂式离心泵
CN209875472U (zh) * 2019-03-19 2019-12-31 西安泵阀总厂有限公司 一种新型两级离心泵
CN213899304U (zh) * 2020-12-04 2021-08-06 烟台阳光泵业有限公司 一种两端支撑径向剖分两级离心泵

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0664398A1 (fr) * 1994-01-21 1995-07-26 WILO GmbH Pompe centrifuge avec clapet de non-retour
CN2365428Y (zh) * 1999-03-09 2000-02-23 赵彤涌 直联式轴向吸入两级离心泵
CN101021213A (zh) * 2006-03-28 2007-08-22 姜万芝 多流道式叶轮离心泵
EP2060791A1 (fr) * 2007-11-13 2009-05-20 Pedrollo S.p.a. Pompe électrique centrifuge avec aspiration axiale
CN204327512U (zh) * 2014-11-20 2015-05-13 大连惠生泵业有限公司 立式双级自吸泵
CN206785748U (zh) * 2017-05-27 2017-12-22 沈阳启源工业泵制造有限公司 一种可快速拆装两级悬臂式离心泵
CN209875472U (zh) * 2019-03-19 2019-12-31 西安泵阀总厂有限公司 一种新型两级离心泵
CN213899304U (zh) * 2020-12-04 2021-08-06 烟台阳光泵业有限公司 一种两端支撑径向剖分两级离心泵

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