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EP2505842A1 - Agrégat de pompe centrifuge à plusieurs étages - Google Patents

Agrégat de pompe centrifuge à plusieurs étages Download PDF

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Publication number
EP2505842A1
EP2505842A1 EP11002578A EP11002578A EP2505842A1 EP 2505842 A1 EP2505842 A1 EP 2505842A1 EP 11002578 A EP11002578 A EP 11002578A EP 11002578 A EP11002578 A EP 11002578A EP 2505842 A1 EP2505842 A1 EP 2505842A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
liquid
impeller
pump assembly
stage centrifugal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11002578A
Other languages
German (de)
English (en)
Other versions
EP2505842B1 (fr
Inventor
Steen Mikkelsen
Bo Møller Jensen
Aage Bruhn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44515211&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2505842(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP11002578.0A priority Critical patent/EP2505842B1/fr
Priority to IN817DE2012 priority patent/IN2012DE00817A/en
Priority to AU2012201654A priority patent/AU2012201654B2/en
Priority to RU2012112043/06A priority patent/RU2578778C2/ru
Priority to US13/433,398 priority patent/US9879680B2/en
Priority to CN2012100942511A priority patent/CN102734176A/zh
Priority to CN201910559567.5A priority patent/CN110307166A/zh
Publication of EP2505842A1 publication Critical patent/EP2505842A1/fr
Publication of EP2505842B1 publication Critical patent/EP2505842B1/fr
Application granted granted Critical
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • 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
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • 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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a multi-stage centrifugal pump unit with at least two wheels, d. H. an at least two-stage centrifugal pump unit.
  • centrifugal pump units In such multistage centrifugal pump units, a plurality of impellers are arranged one behind the other in the conveying direction, so that a further pressure increase takes place from stage to stage.
  • the problem with these centrifugal pump units is that they must first be vented during commissioning and filled with liquid.
  • the centrifugal pump units are not self-priming. This is disadvantageous in certain applications, for example in fire extinguishing equipment, where not a constant filling with liquid, especially water can be guaranteed. In such facilities it is important that the pumps used are self-priming.
  • the multi-stage centrifugal pump assembly according to the invention has at least two impellers, which are preferably arranged on a common shaft and driven by them by a motor, in particular an electric motor.
  • the multi-stage centrifugal pump assembly according to the invention is constructed so that it has two successive impeller groups, ie groups of pump stages, in each case in the flow direction at least one impeller is present.
  • the first impeller group in the flow direction is designed so that it allows a self-priming behavior of the centrifugal pump.
  • a return flow channel is present in the first impeller group, which connects the output side of the first impeller group with its input side. This return flow channel makes it possible for a fluid flow through the return flow channel and through the impeller to be effected within the first impeller group by means of the at least one impeller. Ie. in the first impeller group a limited amount of liquid can be circulated.
  • This circulating amount of liquid causes in the first impeller group sufficient suction to suck in more liquid. This allows the entire centrifugal pump unit to automatically draw in liquid. It is only preferred that in the first impeller group, in particular in the return flow channel, a limited amount of liquid is always present to ensure that the circulating flow through the impeller of the first impeller group and the return flow channel can be used when the pump is in operation.
  • the return flow channel preferably opens into the suction mouth of a first stage of the first impeller group. It is thereby achieved that the liquid flowing through the return channel is returned to the inlet side of the impeller of the first stage, so that a circulating flow is achieved here.
  • At least one valve for closing the return flow channel is present in the return flow channel.
  • the return flow channel can be closed when the pump has reached its normal operating state.
  • an open return flow channel and continuous fluid return would degrade the efficiency of the centrifugal pump assembly.
  • the valve is designed such that it closes the return flow channel upon reaching a predetermined fluid pressure in the return flow channel or on the output side of the first impeller group.
  • the achievement of the predetermined fluid pressure is detected as a normal operating state or an operating state in which there is already a sufficient flow rate when aspirating additional liquid.
  • the fluid pressure in the return flow channel i. H. detected at the output side of the first impeller group.
  • the valve is preferably designed as a spring element, wherein it is kept open by spring action against the prevailing in the return flow fluid pressure. When the fluid pressure exceeds the spring force, the valve is closed.
  • an opening may be provided in the return flow, in front of the flow direction in which a spring plate is located, which is curved so that the sheet is spaced in its rest position from the opening. Due to increased fluid pressure, the sheet can be deformed against its spring bias so that it is pressed against the opening and closes it.
  • the first impeller group is formed at least two stages with two successively arranged in the flow direction impellers.
  • the return flow channel is arranged so that it leads from the output side of the second impeller to the input side of the first impeller.
  • a separating element On the output side of the first impeller group, a separating element is preferably arranged, which is designed to separate air and liquid. Especially when starting the pump unit when initially only a small amount of liquid is conveyed through the return flow channel, the centrifugal pump unit will also suck in air through its suction line, with air and liquid ideally mixing on entering the first impeller. Therefore, it is expedient to separate the air from the liquid on the output side of the first impeller group in order to return preferably exclusively liquid through the return channel to the input side of the first impeller group. This prevents dry running of the return flow channel.
  • the separation element is more preferably arranged relative to the return flow channel so that the liquid emerging from the separation element enters the return flow channel. This ensures that the liquid flowing in from the return flow channel into the first impeller group, when it exits the first impeller group again, substantially completely re-enters the return channel so as to create a cycle.
  • a check valve or a non-return valve is preferably arranged, which prevents liquid from the centrifugal pump assembly can run back into a suction line. This prevents that the centrifugal pump unit can run completely dry, it is held by the check valve even when decommissioning of the centrifugal pump assembly liquid in the interior of the centrifugal pump unit, which allows the sudan secured and re-aspiration.
  • the check valve may be integrated directly into the centrifugal pump unit, but may also be recognized as a separate component to the suction nozzle of the centrifugal pump assembly.
  • At least one liquid reservoir is arranged between the first and the second impeller group.
  • the liquid storage is designed so that it fills with liquid during normal operation of the centrifugal pump assembly.
  • the liquid reservoir preferably has at least one outlet opening, which is arranged such that it faces an inlet opening of the reflux channel in such a way that liquid can flow out of the liquid store into the reflux channel. This ensures that the return flow channel is first filled or kept filled by the liquid reservoir.
  • the liquid from the reflux channel then flows to the input side of the first impeller of the first impeller group and enters this, so that this impeller can immediately achieve a conveying effect and can suck in more liquid through the suction line.
  • the liquid in the return flow channel is first circulated in the first impeller group.
  • the centrifugal pump assembly according to the invention is preferably designed so that the axis of rotation of the wheels extends vertically.
  • the liquid storage device described above is then preferably designed so that its outlet opening is arranged on the underside, so that the liquid from the liquid storage gravitational emerge down and enter the return flow channel can.
  • the liquid reservoir is preferably filled from above via the liquid flowing to the pump stages arranged behind the liquid reservoir or above the liquid reservoir.
  • the return flow channel preferably has an upwardly directed opening, so that the liquid can enter from the liquid reservoir from above into this opening.
  • At least two liquid stores can be arranged such that an outlet opening of the second liquid store opens into an opening of a first liquid store.
  • two or more liquid reservoirs can be arranged one behind the other in the flow or conveying direction between the first impeller group and the second impeller group.
  • the liquid flows from the first or lower liquid storage, as described above, preferably in the return channel.
  • the liquid from the second or subsequent liquid storage first flows into the first liquid storage and from this then in the return channel.
  • liquid can pass from a third liquid reservoir into the second liquid reservoir.
  • All liquid reservoirs preferably have an outlet opening at the bottom and an inlet opening at the top.
  • the at least one liquid reservoir is designed as an annular pot with an open top, which surrounds a shaft driving the wheels.
  • the pot is annular or torus-shaped and has an opening in the middle, through which the shaft extends.
  • the opening also serves as a flow path for the conveyed liquid from the first impeller group to the second impeller group.
  • a space around the shaft is provided in the opening.
  • the pot-shaped liquid storage is open at its top, so that the liquid, which flows through the central opening over the edge of the opening from above into the cup-shaped liquid storage can run.
  • the described at least one outlet opening is preferably formed on the underside.
  • the outlet openings of the subsequent liquid storage are arranged so that they are located above the top of the respective preceding liquid storage, so that the liquid from the outlet opening runs in the preceding liquid storage. From the first, ie lowermost liquid storage, the liquid from the outlet opening, as described, runs in the return line.
  • the outlet openings are sized in size so that the liquid reservoirs empty slowly.
  • the individual impellers of the second impeller group are each arranged in a step module, wherein all stage modules have the same axial height, and the at least one impeller of the first impeller group is also arranged in such a step module having an axial height, the axial height or an integral multiple of the height of a step module of the second impeller group corresponds.
  • This modular design with a fixed grid of the axial heights or lengths of the individual modules has the advantage that from the modules very simple centrifugal pump units of different performance, in particular different delivery and suction heights can be realized.
  • the first self-priming impeller group can be easily integrated into conventional multi-stage centrifugal pumps, since the parts of the first impeller group in their axial length have the same grid as the modules of the second impeller group.
  • the same tightening straps can be used to hold the modules together as used in conventional multi-stage centrifugal pumping units.
  • the required part variety can be reduced.
  • the arranged between the two impeller groups liquid storage or spacer elements each have an axial height, which corresponds to the axial height or an integral multiple of this height of a step module of the second impeller group.
  • the centrifugal pump unit described by way of example has a total of eight stages, ie eight wheels. Of these, two wheels 2 are arranged in a first impeller group 4 and six impellers 6 in a second impeller group 8.
  • the first impeller group 4 faces the inlet or suction nozzle 10 of the pump unit.
  • the second impeller group 8 is connected downstream of the first impeller group in the flow or conveying direction.
  • All wheels 2 and 6 are driven by a common shaft 16.
  • the shaft 16 is connected at its shaft end 18 with a motor, not shown here, for example, an electric motor for driving.
  • the first impeller group 4 is designed to be self-priming in the manner described below, so that the centrifugal pump via the suction nozzle 10 can suck liquid even if the suction nozzle 10 and an upstream subsequent suction line are not filled with liquid.
  • the self-priming effect of the first impeller group 4 is determined by the basis of Fig. 2 achieved embodiment explained in more detail.
  • a separating element 20 is arranged on the output side of the second impeller 2 in the flow direction of the first impeller group 4. This is designed so that liquid and air are separated from each other. This happens because the liquid is accelerated radially outward, so that the air exits from the separating element 20 in the central region near the shaft 16 and the liquid in the peripheral region near the peripheral wall 22.
  • the liquid emerging from the separating element 20 flows over the circumferential wall 22 at its upper edge and enters a return flow channel 24.
  • the return flow channel 24 leads on the outer circumference of the first impeller group 4 back in the direction of the suction nozzle 10.
  • the return flow channel leads to the suction mouth 28 of the first impeller 2 in the flow direction of the first impeller group 4.
  • a closed liquid circuit on the two wheels. 2 of the separating element 20 is realized back through the return flow channel 24 to the suction mouth 28 of the first impeller 2.
  • the seals 30 seal the return channel 24 against the pressure channel 12, so that prevents liquid from the pressure side via the return passage 24 can flow over to the suction side in normal operation.
  • a bearing 32 is arranged, which is in contact with the outer circumference of the shaft 16. This also serves to seal the separator 20 with respect to the shaft 16 to prevent air from the separator 20 from flowing back to the impellers 2.
  • the seal 34 seals the axial end of the shaft 16 to prevent air from flowing from the pressure side of the pump via the shaft to the suction side.
  • the seal 36 also serves to separate the pressure side from the suction side, d. H. to seal the discharge nozzle 14 against the suction nozzle 10.
  • a valve 38 is arranged in the return flow channel 24.
  • This valve 38 is designed such that when it reaches a predetermined pressure on the output side of the second impeller 2, ie on the output side of the separating element 20 and the reflux channel 24 closes the return flow channel. Ie. after reaching this predetermined pressure, the reflux channel 24 is closed and the liquid flows exclusively to the following wheels 6 of the second impeller group eighth
  • Fig. 3 shows a detailed view of the separating element 20.
  • the separating element 20 defines between the outer periphery of the peripheral wall 22 and a radially outer annular wall 40, a first portion of the return flow channel 24, which forms an inlet region of the return flow channel 24.
  • the second portion of the return flow channel 24 is defined between the outer periphery of the wall 40 and a radially spaced sleeve 42 (see FIG Fig. 2 ) Are defined.
  • a plurality of holes 44 are formed, which allow the passage from the inlet region of the return flow channel 24 in the second portion of the return flow channel 24 between the wall 40 and the sleeve 42.
  • valve elements in the form of spring plates 46 are arranged. These spring plates 46 can take two positions, namely once an open position, which in Fig. 3 designated by the reference numeral 46 '. In this position, the spring plate 46 'extends chord-shaped to the inner circumference of the wall 40 and is thus spaced from the opening 44, so that it is released. Now increases the pressure in the region of the return flow channel 24 which is located between the peripheral wall 22 and the wall 40, the spring plate 46 'is pressed radially outward and abuts against the inside of the wall 40 via the opening 44, so that the Opening 44 is closed.
  • liquid storage 48 are arranged between the first impeller group 4 and the second impeller group. These are in detail in Fig. 4 shown.
  • the liquid reservoirs 48 are formed as annular or toroidal pots which surround the shaft 16.
  • the shaft 16 extends through a central opening 50 of the liquid reservoir 48, wherein the wall of the opening 50 is radially spaced from the outer periphery of the shaft 16.
  • the opening 50 also serves as a flow path for the conveyed liquid from the first impeller group 4 to the second impeller group 8.
  • the peripheral walls 52 of the openings 50 have in the direction of the longitudinal axis X a length which is shorter than the axial length of the outer walls of the liquid storage 48.
  • the liquid reservoirs 48 are opened at their upper side, so that liquid which flows through the openings 50 can flow over the peripheral walls 52 into the interior of the liquid reservoirs 48.
  • the liquid reservoirs 48 are filled.
  • Each liquid reservoir 48 has on its underside an outlet opening 54 with a small diameter.
  • the outlet openings 54 are radially spaced from the longitudinal axis X so far that they lie above the free space between the peripheral wall 22 and the wall 40 of the separating element 20.
  • the liquid from the first, ie lower liquid storage 48 runs directly into the return flow channel 24. From the two other liquid reservoirs 48, the liquid first passes through the associated outlet opening 54 into the liquid storage unit 48 located below.
  • the liquid from the liquid storage 48 via the small outlet opening 54 runs slowly, even if larger air bubbles or gas bubbles flow through the pump unit, be ensured that in the pump unit is still a sufficient amount of liquid to at least the starting circuit through the first impeller group 4, ie through the return flow channel 24 in the to start up again as described above.
  • a check valve or non-return valve 55 is still arranged on or in the suction nozzle 10.
  • the check valve 55 is arranged directly in the suction nozzle, but it could also be recognized as a separate component to the suction nozzle 10.
  • a certain amount of liquid can always be kept in the pump unit, via which at least the starting circuit in the first impeller group 4 can be put into operation again, in order then to suck in further liquid through the suction port 10. In this way, the entire centrifugal pump unit is self-priming.
  • the pump unit is a total modular design, this modular design is based on an axial length grid, which is defined by the axial length of the pump stages formed by the wheels 6. These pump stages each have a circumferential jacket 56, which forms the jacket of the individual stage modules. These stage modules are placed axially one on top of the other.
  • the liquid reservoirs 48 have the same axial length as the sheaths 56 of the stage modules of the second impeller group 8.
  • a jacket 58 which surrounds the first impeller 2 has the same axial length.
  • the separating element 20 has an axial length in the direction of the longitudinal axis X, which corresponds to twice the axial length of the sheaths 56 and 58.
  • the entire first impeller group 4 has an axial length which corresponds to three times the length of a step module of the second impeller group 8.
  • This uniform length grid favors the modular design, as clamping bands, which hold the individual stage modules in the axial direction, only in different lengths, which through this underlying grids are defined.
  • a variety of pumps can be assembled with different numbers of wheels, fluid reservoirs 48 and, if necessary, the first impeller group 4 to ensure the self-priming properties.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mining & Mineral Resources (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP11002578.0A 2011-03-29 2011-03-29 Agrégat de pompe centrifuge à plusieurs étages Revoked EP2505842B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP11002578.0A EP2505842B1 (fr) 2011-03-29 2011-03-29 Agrégat de pompe centrifuge à plusieurs étages
IN817DE2012 IN2012DE00817A (fr) 2011-03-29 2012-03-21
AU2012201654A AU2012201654B2 (en) 2011-03-29 2012-03-21 Centrifugal radial pumps and method for manufacturing thereof
RU2012112043/06A RU2578778C2 (ru) 2011-03-29 2012-03-28 Многоступенчатый центробежный насосный агрегат
US13/433,398 US9879680B2 (en) 2011-03-29 2012-03-29 Multi-stage centrifugal pump unit
CN2012100942511A CN102734176A (zh) 2011-03-29 2012-03-29 多级离心泵机组
CN201910559567.5A CN110307166A (zh) 2011-03-29 2012-03-29 多级离心泵机组

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11002578.0A EP2505842B1 (fr) 2011-03-29 2011-03-29 Agrégat de pompe centrifuge à plusieurs étages

Publications (2)

Publication Number Publication Date
EP2505842A1 true EP2505842A1 (fr) 2012-10-03
EP2505842B1 EP2505842B1 (fr) 2019-12-25

Family

ID=44515211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11002578.0A Revoked EP2505842B1 (fr) 2011-03-29 2011-03-29 Agrégat de pompe centrifuge à plusieurs étages

Country Status (6)

Country Link
US (1) US9879680B2 (fr)
EP (1) EP2505842B1 (fr)
CN (2) CN110307166A (fr)
AU (1) AU2012201654B2 (fr)
IN (1) IN2012DE00817A (fr)
RU (1) RU2578778C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187648A1 (fr) 2013-05-22 2014-11-27 Grundfos Holding A/S Ensemble pompe centrifuge auto-amorçante à plusieurs étages
CN107448423A (zh) * 2016-05-31 2017-12-08 埃贝斯佩歇气候控制系统有限责任两合公司 特别是用于车辆取暖设备的侧通道鼓风机
CN108953158A (zh) * 2018-09-20 2018-12-07 浙江南元泵业有限公司 多出口离心泵
CN112112840A (zh) * 2020-09-11 2020-12-22 台州沃乐农泵业有限公司 一种家具厂风机过滤防护组件

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2607703B1 (fr) * 2011-12-22 2014-06-18 Grundfos Holding A/S Pompe centrifuge
DE102014214805A1 (de) * 2014-07-29 2016-02-04 Ksb Aktiengesellschaft Mantelgehäusepumpe
EP3244066B1 (fr) * 2016-05-12 2020-11-18 Grundfos Holding A/S Pompe centrifuge
EP3293397B1 (fr) * 2016-09-13 2018-10-24 Grundfos Holding A/S Pompe centrifuge et procédé de purge d'air
US10697462B2 (en) 2016-09-26 2020-06-30 Fluid Handling Llc Multi-stage impeller produced via additive manufacturing
EP3343054A1 (fr) 2016-12-28 2018-07-04 Grundfos Holding A/S Dispositif de retenue de palier pour pompe centrifuge à étages multiples
EP3686434A1 (fr) * 2019-01-25 2020-07-29 Pentair Flow Technologies, LLC Ensemble à auto-amorçage destiné à être utilisé dans une pompe à étages multiples
CN111594451A (zh) * 2020-05-29 2020-08-28 广东凌霄泵业股份有限公司 卧式自吸泵
EP3929445A1 (fr) * 2020-06-22 2021-12-29 Grundfos Holding A/S Dispositif de pompe centrifuge
CN117823415B (zh) * 2024-03-04 2024-05-03 山东华立供水设备有限公司 一种多级离心泵

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EP0406787A2 (fr) * 1989-07-05 1991-01-09 Ebara Corporation Corps, particulièrement pour pompes centrifuges à roue radiale et procédé de fabrication
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187648A1 (fr) 2013-05-22 2014-11-27 Grundfos Holding A/S Ensemble pompe centrifuge auto-amorçante à plusieurs étages
RU2636288C2 (ru) * 2013-05-22 2017-11-21 Грундфос Холдинг А/С Многоступенчатый самовсасывающий центробежный насосный агрегат
US10337516B2 (en) 2013-05-22 2019-07-02 Grundfos Holding A/S Multi-stage, self-priming centrifugal pump assembly
CN107448423A (zh) * 2016-05-31 2017-12-08 埃贝斯佩歇气候控制系统有限责任两合公司 特别是用于车辆取暖设备的侧通道鼓风机
CN107448423B (zh) * 2016-05-31 2019-10-15 埃贝斯佩歇气候控制系统有限责任两合公司 侧通道鼓风机
US10527044B2 (en) 2016-05-31 2020-01-07 Eberspächer Climate Control Systems GmbH & Co. KG Side channel blower, especially for a vehicle heater
CN108953158A (zh) * 2018-09-20 2018-12-07 浙江南元泵业有限公司 多出口离心泵
CN112112840A (zh) * 2020-09-11 2020-12-22 台州沃乐农泵业有限公司 一种家具厂风机过滤防护组件
CN112112840B (zh) * 2020-09-11 2022-09-23 南通大通宝富风机有限公司 一种家具厂风机过滤防护组件

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AU2012201654B2 (en) 2015-08-20
RU2578778C2 (ru) 2016-03-27
CN110307166A (zh) 2019-10-08
US20120251308A1 (en) 2012-10-04
AU2012201654A1 (en) 2012-10-18
RU2012112043A (ru) 2013-10-10
CN102734176A (zh) 2012-10-17
US9879680B2 (en) 2018-01-30
EP2505842B1 (fr) 2019-12-25
IN2012DE00817A (fr) 2015-08-21

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