EP2359009A1 - Reduzierbare entlastungsöffnung - Google Patents
Reduzierbare entlastungsöffnungInfo
- Publication number
- EP2359009A1 EP2359009A1 EP09774627A EP09774627A EP2359009A1 EP 2359009 A1 EP2359009 A1 EP 2359009A1 EP 09774627 A EP09774627 A EP 09774627A EP 09774627 A EP09774627 A EP 09774627A EP 2359009 A1 EP2359009 A1 EP 2359009A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- inserts
- pressure
- centrifugal pump
- sleeve
- 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
Links
- 239000002184 metal Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0027—Varying behaviour or the very pump
-
- 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
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/501—Elasticity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/518—Ductility
Definitions
- the invention relates to a centrifugal pump one or more stages with arranged in the pump housing, driven impeller or impellers, a Wellenabdich- and wherein at least one cover plate of at least one impeller one or more adjustable discharge openings are arranged.
- axial thrust In centrifugal pumps, the resultant of the axial forces acting on a pump impeller is referred to as the axial thrust. Their exact determination is described in the KSB-Centrifugal Pump Encyclopaedia, 3rd edition, under the keyword "axial thrust" on pages 32 ff In single-stage centrifugal pumps, axial force relief with discharge openings in a pressure-side impeller cover disc has proven to be the frequent measure Relief openings also occur in combination with additional sealing gaps and housing ribs or impeller blades.
- centrifugal pumps regardless of whether they are single-stage or multi-stage, one or more impellers, in most cases a shaft seal and a bearing carrier, are arranged downstream.
- the discharge openings for the axial thrust are usually selected so large that a residual residual axial thrust can be easily absorbed by the shaft bearings. Its magnitude is below a permissible axial bearing load of the bearing.
- Embodiments provide that the insert is formed as a clamping sleeve and is held elastically deformable in a discharge opening.
- the insert is formed as a clamping sleeve and is held elastically deformable in a discharge opening.
- running inserts have proven to be advantageous, which are equipped with a radially projecting collar. If required, these sleeve-type inserts are inserted into standardized relief openings in the manner of hollow rivets and held therein by plastic deformation or by frictional engagement.
- Figure 1 a cast impeller in section with pressed sleeve and the
- Figure 2 a sheet metal wheel with pressed-in and formed sleeve.
- Fig. 1 shows a centrifugal pump impeller radial and closed type.
- the impeller 1 receiving housing as well as the impeller 1 via a hub 2 driving shaft and a shaft seal was omitted for reasons of clarity.
- Trained as a casting impeller 1 has a pressure-side impeller cover disc 3, the BE 2 is provided in the transition region to a plurality of evenly distributed on a diameter arranged discharge openings 4. These are often designed as holes.
- a fluid conveyed by the impeller 1 flows from the impeller inlet 5 through the blade channels 7 bounded by blades 6 to the impeller outlet 8 and flows into the interior of a housing.
- the pressure prevailing at the impeller outlet 8 acts and exerts a force in the axial direction both on the pressure-side impeller cover disk 3 and on the opposite intake-side impeller cover disk 9.
- a resulting axial force As a result of the different size of the surfaces of the impeller cover discs resulting from the pressure acting thereon, a resulting axial force. With a wrong interpretation of the conditions, this will have negative effects on the bearings of a shaft driving the impeller.
- An impeller 1 is usually provided with a suction side gap surface 10 and pressure side gap surface 11, which are arranged opposite stationary housing cleavage surfaces, thus forming gap seals between stationary and rotating parts.
- a gap surface 11 for a gap seal is arranged by way of example.
- a fluid located on the pressure side DRS flows through the relief openings 4 back into the region of the impeller inlet 5 and the region of the inlet edges of the blades 6, where a low inlet pressure prevails.
- the sum of the cross section of the individual discharge openings 4 is chosen so large that it ensures a defined remaining residual axial thrust. Whose size should not exceed the permissible bearing load of arranged in a bearing carrier bearings in all possible operating conditions.
- the number of relief openings 4 is usually dependent on the number of blades used an impeller 1 and the consequent number of blade channels.
- one of these relief openings 4 is shown in section and is located above the hub 2.
- the relief hole 4 corresponds to the cross-section and number forth a design state of the pump.
- at least one sleeve-shaped insert 12 which reduces the cross-section, is arranged in one or more discharge openings 4. This can be a pressed-in bushing or an elastically deformable clamping sleeve, clamping sleeve, clamping pin or an analogously acting machine element.
- Such a throttling insert can be installed at a final assembly of the pump in a factory, if the exact operating conditions for a pumped fluid of the pump are known. Likewise, an axial thrust adjustment by retrofitting or disassembly of one or more inserts 12 can easily take place at a later installation location of the pump.
- spring-trained clamping sleeves have proven that can be used in the simplest way in existing relief openings 4. Due to the elastic shape change of the inserts 12 they are at a mounting elastically reduced in diameter and held by their residual stress safely in the relief hole 4.
- Fig. 2 shows a similar, but designed as a sheet metal part impeller 1.
- plastically deformable sleeves 13 are used.
- sleeves 13 proved to be advantageous because they are simply used in such relief openings and held by the collar 14.
- the other sleeve end 15 can be widened and thus the sleeve 13 can be securely fixed in the running wheel 1. This can be done with the aid of a riveting or crimping tool, whereby one or both ends of the sleeve 13 are reshaped.
- a sleeve 13 may also be an elastic deformable sleeve 12, as shown in Fig. 1, additionally arranged, so as to further restrict the flow area.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008062584A DE102008062584A1 (de) | 2008-12-16 | 2008-12-16 | Reduzierbare Entlastungsöffnung |
PCT/EP2009/008531 WO2010072307A1 (de) | 2008-12-16 | 2009-12-01 | Reduzierbare entlastungsöffnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2359009A1 true EP2359009A1 (de) | 2011-08-24 |
EP2359009B1 EP2359009B1 (de) | 2012-09-19 |
Family
ID=41674168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09774627A Not-in-force EP2359009B1 (de) | 2008-12-16 | 2009-12-01 | Reduzierbare entlastungsöffnung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2359009B1 (de) |
CN (1) | CN102245904A (de) |
DE (1) | DE102008062584A1 (de) |
DK (1) | DK2359009T3 (de) |
WO (1) | WO2010072307A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010026132A1 (de) * | 2010-07-05 | 2012-01-05 | Mahle International Gmbh | Laufrad und Fluidpumpe |
CN109723668B (zh) * | 2018-12-23 | 2023-04-07 | 无锡市华冷机械有限公司 | 一种便于拆卸的矿用泵叶轮 |
CN112392773B (zh) * | 2019-12-13 | 2022-07-22 | 苏州琦谷佳科技有限公司 | 一种带有轴向力平衡管结构的低噪声屏蔽泵 |
DE102023110014A1 (de) | 2023-04-20 | 2024-10-24 | Bühler Motor GmbH | Laufrad für eine fluidpumpe und verfahren zu dessen herstellung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4938641B1 (de) * | 1970-08-06 | 1974-10-19 | ||
SU383892A1 (ru) | 1971-03-04 | 1973-05-23 | Кишиневский завод герметических насосов М. В. Фрунзе | Лрпастная машина |
DE7132016U (de) * | 1971-08-21 | 1973-03-08 | Klein Schanzlin & Becker Ag | Mehrstufige kreumpe mit selbsttaetigem axialschubausgleic |
SU523994A1 (ru) | 1974-11-05 | 1976-08-05 | Предприятие П/Я В-8721 | Лопастна машина |
DE2640990A1 (de) * | 1976-09-11 | 1978-03-16 | Klein Schanzlin & Becker Ag | Kreiselpumpe mit selbsttaetiger axialschubregelung an einem der laufraeder |
DE8707360U1 (de) * | 1987-05-22 | 1987-07-09 | Deutsche Vortex GmbH, 7140 Ludwigsburg | Läufer für einen Elektromotor |
JP3537349B2 (ja) * | 1998-04-20 | 2004-06-14 | 日機装株式会社 | スラストバランス装置 |
CN2713185Y (zh) * | 2004-07-22 | 2005-07-27 | 薛肇江 | 电动燃油叶轮泵叶轮 |
CN2742199Y (zh) * | 2004-09-30 | 2005-11-23 | 上海东方泵业(集团)有限公司 | 叶轮轴向间隙调整装置 |
CN2929259Y (zh) * | 2006-07-15 | 2007-08-01 | 李琢书 | 叶轮泵 |
-
2008
- 2008-12-16 DE DE102008062584A patent/DE102008062584A1/de not_active Withdrawn
-
2009
- 2009-12-01 CN CN2009801504296A patent/CN102245904A/zh active Pending
- 2009-12-01 WO PCT/EP2009/008531 patent/WO2010072307A1/de active Application Filing
- 2009-12-01 EP EP09774627A patent/EP2359009B1/de not_active Not-in-force
- 2009-12-01 DK DK09774627.5T patent/DK2359009T3/da active
Non-Patent Citations (1)
Title |
---|
See references of WO2010072307A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2359009B1 (de) | 2012-09-19 |
WO2010072307A1 (de) | 2010-07-01 |
DE102008062584A1 (de) | 2010-06-17 |
CN102245904A (zh) | 2011-11-16 |
DK2359009T3 (da) | 2013-01-02 |
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