EP0985098A1 - Centrifugal pump with inflow guide device - Google Patents
Centrifugal pump with inflow guide deviceInfo
- Publication number
- EP0985098A1 EP0985098A1 EP98925611A EP98925611A EP0985098A1 EP 0985098 A1 EP0985098 A1 EP 0985098A1 EP 98925611 A EP98925611 A EP 98925611A EP 98925611 A EP98925611 A EP 98925611A EP 0985098 A1 EP0985098 A1 EP 0985098A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- guide
- inlet
- guide device
- vane
- 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
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
- F04D29/40—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
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
-
- 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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
Definitions
- the invention relates to a centrifugal pump with an axial inlet and an inlet guide device upstream of the impeller, which has a plurality of rigid guide vanes, which on their side facing the impeller each have an edge pointing in or against the direction of rotation of the impeller.
- Centrifugal pumps with an axial inlet often have an inlet guide device, which is connected upstream of the first impeller. Your task is to remove any swirl from the liquid to be conveyed so that there is an axial flow after the inlet guide device.
- the inlet guide device can consist of several guide vanes distributed uniformly over the circumference of the inlet.
- the guide vanes can be connected to one another in the axis of the inlet and thus form a star or a cross.
- inlet guiding devices From DE 471 149 and DE 649 668 inlet guiding devices are known, the blades of which can be curved in or against the direction of rotation of the impeller in order to adapt to particular inflow conditions or to bring them about.
- the curvature is arc-shaped and extends with a constant axial extension over the entire radial course of the blade.
- the curvature has only a small axial extent compared to the blade.
- inlet guide devices which were equipped with seven blades and were relatively complex
- inlet crosses ie inlet guide devices comprising only four blades, are preferred today.
- These devices which are in themselves less complex, could, however, have an inherent disadvantage of the centrifugal pumps which flow axially Pump characteristic readable instability, hardly reduce.
- the invention is therefore based on the object of achieving such a reduction in a centrifugal pump of the type mentioned at the beginning and improving the delivery conditions as a whole.
- edge pointing in or against the direction of rotation is formed by a swirl vane which is formed on the guide vane and is arranged in the region of the wall of the inlet and which has a shorter radial extension than the vane.
- the angle of attack depends on the type of hydraulics. It can be determined on the basis of measurements, i. H. it can be set specifically to achieve different effects on the pump characteristic in all operating points.
- the swirl vane converts the almost one-dimensional flow in the axial inlet to a three-dimensional swirled flow in the region of the wall of the inlet or the inlet nozzle. This conversion leads to better efficiency at all load points and reduces the instability of the pump. In particular, the kinetic energy of the gap and recirculation flow is fed back to the inflow, so it becomes energy recovered. With increasing flow, e.g. B. with overload, the pre-twist increases.
- the change in the inflow achieved by the inlet guiding device according to the invention leads to a power-saving and availability-increasing operating point adjustment, since the rumor limit is clearly shifted to the left.
- the design according to the invention also improves the outflow on the impeller, so that secondary flows and separations behind the impeller blades are reduced.
- one or more of the guide vanes each have on their side facing away from the impeller a Vorieitschaufel similar in shape and size of the swirl vane. It can be seen that the flow guidance is further improved by such a forward scoop.
- the invention can be implemented with simple means if, as is known per se, the guide vanes are arranged in the form of a cross or a star.
- Fig. 1 shows a partial section of a centrifugal pump according to the invention, in
- Fig. 2 is an inlet guide device of the type according to the invention in a perspective view
- Fig. 3 is a view of a guide vane with a swirl vane, shown with two attachment options, in
- Fig. 4 is a plan view of the vane of Fig. 3, and in
- Fig. 5 is a side view of a guide vane with a twisted vane and Vorieitschaufel.
- the centrifugal pump shown in FIG. 1 has a housing 1 with an upstream inlet nozzle 2.
- An impeller 4 is arranged on a shaft 3.
- a pressure connection 5 forms the end in the direction of flow.
- a swirl cross rigidly attached in the inlet nozzle 2, which essentially consists of four guide vanes 6.
- a Vorieitschaufel 7 and one are each formed on the guide vanes 6
- Swirl vane 8 The rotation of the shaft 3 and the impeller 4 correspond to the direction of rotation indicator 9.
- the dimension S which indicates the distance of the center line of the guide vane 6 from the front edge of the impeller 4.
- the dimension S which depends on the type of pump, especially the impeller geometry, is to be determined - for example with the help of tests - in such a way that the inlet guide device exerts an optimal influence on the flow and thus on the pump characteristic.
- the ratio of the guide vanes 6, the guide vanes 7 and the swirl vanes 8 to one another can be seen from the swirl cross shown in FIG. 2.
- a possible angle range between + ⁇ and - ⁇ for the direction of adjustment of the swirl blades 8 is indicated here.
- the positive angle + ⁇ points in the direction of rotation of the impeller 4.
- a negative angle ⁇ shows the guide blade 6 against the direction of rotation of the impeller 4.
- FIGS. 3 and 4 For better recognition of the possible angular range for the adjustment of the swirl vane 8 to the guide vane 6, these are illustrated in FIGS. 3 and 4 even more clearly.
- the blade thickness D can also be seen from these illustrations.
- the guide vane 6 has a height H L
- the Vorieitschaufel 7 has a height H v
- the height of the swirl vane 8 is indicated by H D.
- L L is the length of the guide vane 6.
- L v indicates the length of the forward vane 7 and L D the length of the swirl vane 8.
- the length and the height of the guide vanes 6, the preliminary guide vanes 7 and the swirl vanes 8 are designed in such a way that they optimally influence the characteristic curve.
- the swirl vane 8 develops its greatest influence in the area of the wall of the inlet nozzle 2.
- the intensity is reduced by the inlet guide device.
- the surface of the inlet guiding device should be as small and hydraulically smooth as possible in order to reduce the loss of friction.
- the blades 6, 7 and 8 of the pre-guiding device can also be profiled.
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 (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722353A DE19722353A1 (en) | 1997-05-28 | 1997-05-28 | Centrifugal pump with an inlet guiding device |
DE19722353 | 1997-05-28 | ||
PCT/EP1998/002908 WO1998054471A1 (en) | 1997-05-28 | 1998-05-18 | Centrifugal pump with inflow guide device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0985098A1 true EP0985098A1 (en) | 2000-03-15 |
EP0985098B1 EP0985098B1 (en) | 2003-05-02 |
Family
ID=7830757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98925611A Expired - Lifetime EP0985098B1 (en) | 1997-05-28 | 1998-05-18 | Centrifugal pump with inflow guide device |
Country Status (6)
Country | Link |
---|---|
US (1) | US6273677B1 (en) |
EP (1) | EP0985098B1 (en) |
JP (1) | JP3802572B2 (en) |
DE (2) | DE19722353A1 (en) |
ES (1) | ES2196563T3 (en) |
WO (1) | WO1998054471A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MD2246C2 (en) * | 2001-09-28 | 2004-02-29 | Сочиетатя Пе Акциунь "Молдовахидромаш" | Centrifugal pump blade branch |
MD2432C2 (en) * | 2001-09-28 | 2004-11-30 | Сочиетатя Пе Акциунь "Молдовахидромаш" | Branch of the rotodynamic pump |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7089963B2 (en) * | 2002-11-26 | 2006-08-15 | David Meheen | Flow laminarizing device |
DE102007048019A1 (en) * | 2007-10-06 | 2009-04-09 | Bayerische Motoren Werke Aktiengesellschaft | Liquid pump i.e. coolant pump, for internal-combustion engine, has radially inward projecting flow guide rib aligned towards rotation axis and provided in housing and/or section of suction pipe that is adjoined to transport wheel |
MX2011002665A (en) | 2008-09-10 | 2011-07-28 | Pentair Pump Group Inc | High-efficiency, multi-stage centrifugal pump and method of assembly. |
PL2172654T5 (en) * | 2008-10-01 | 2014-04-30 | Grundfos Management As | Centrifugal pump assembly |
GB0821089D0 (en) * | 2008-11-19 | 2008-12-24 | Ford Global Tech Llc | A method for improving the performance of a radial compressor |
CN101929465B (en) * | 2009-06-19 | 2013-12-11 | 德昌电机(深圳)有限公司 | Drainage pump |
EA024499B1 (en) * | 2010-03-05 | 2016-09-30 | Уэйр Минералз Острэйлиа Лтд. | Pump intake device |
US9033685B1 (en) * | 2010-04-26 | 2015-05-19 | Rex N. Await | Well pump flow sleeve installation assembly and method |
DE102010053510B4 (en) * | 2010-12-04 | 2014-01-23 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Coolant pump |
DE102011109535B4 (en) * | 2011-08-05 | 2013-08-08 | Sew-Eurodrive Gmbh & Co. Kg | Fan arrangement and engine |
US9303647B2 (en) | 2011-08-15 | 2016-04-05 | Dale A. Conway | Centrifugal pump anti-air locking system |
JP6078303B2 (en) * | 2012-11-13 | 2017-02-08 | 三菱重工業株式会社 | Centrifugal fluid machine |
KR20170120202A (en) * | 2013-01-23 | 2017-10-30 | 컨셉츠 이티아이 인코포레이티드 | Structures and methods for forcing coupling of flow fields of adjacent bladed elements of turbomachines, and turbomachines incorporating the same |
JP6866019B2 (en) | 2014-06-24 | 2021-04-28 | コンセプツ エヌアールイーシー,エルエルシー | Flow control structure of turbomachinery and its design method |
DE102014222877A1 (en) * | 2014-11-10 | 2016-05-12 | Siemens Aktiengesellschaft | Impeller of a radial turbofan energy machine, stage |
JP6806551B2 (en) * | 2016-12-14 | 2021-01-06 | 株式会社豊田中央研究所 | Centrifugal compressor, turbocharger |
CN110081026B (en) * | 2019-05-16 | 2020-05-22 | 西安交通大学 | Inlet guide vane for weakening leakage flow at blade top of centrifugal compressor and adjusting method |
WO2022032296A1 (en) | 2020-08-07 | 2022-02-10 | Concepts Nrec, Llc | Flow control structures for enhanced performance and turbomachines incorporating the same |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1716008A (en) * | 1924-09-12 | 1929-06-04 | Westinghouse Electric & Mfg Co | Guide-vane construction for pumps and blowers |
DE471149C (en) * | 1925-12-24 | 1929-02-12 | Gill Propeller Company Ltd | Hydraulic machine with axial flow |
DE649668C (en) * | 1930-02-04 | 1937-09-04 | James Herbert Wainwright Gill | Runner for hydraulic machines |
US2083185A (en) * | 1936-03-23 | 1937-06-08 | American Blower Corp | Fan |
GB719061A (en) * | 1950-06-21 | 1954-11-24 | United Aircraft Corp | Blade arrangement for improving the performance of a gas turbine plant |
US2834536A (en) * | 1955-09-29 | 1958-05-13 | Westinghouse Electric Corp | Spin vane controls for fans |
US4147465A (en) * | 1972-09-02 | 1979-04-03 | Klein, Schanzlin & Becker Aktiengesellschaft | Means for abruptly terminating the flow of fluid in closed fluid circuit systems of nuclear reactor plants or the like |
JPS5896197A (en) * | 1981-12-02 | 1983-06-08 | Nissan Motor Co Ltd | Air intake of centrifugal compressor |
JPS5929799A (en) * | 1982-08-12 | 1984-02-17 | Matsushita Electric Ind Co Ltd | Fan |
JPS59128998A (en) * | 1983-01-12 | 1984-07-25 | Matsushita Electric Ind Co Ltd | Electric blower |
FI843263A (en) * | 1984-08-17 | 1986-02-18 | Nokia Oy Ab | CENTRIFUGALFLAEKT SAMT INSTAELLNINGSVINGGRUPP OCH INSTAELLNINGSVINGSERIE FOER DYLIKA FLAEKTAR. |
US4884942A (en) * | 1986-06-30 | 1989-12-05 | Atlas Copco Aktiebolag | Thrust monitoring and balancing apparatus |
US4764088A (en) * | 1987-04-21 | 1988-08-16 | Kapich Davorin D | Inlet guide vane assembly |
US4854818A (en) * | 1987-12-28 | 1989-08-08 | Rockwell International Corporation | Shrouded inducer pump |
JPH07117076B2 (en) * | 1989-05-26 | 1995-12-18 | 太平洋機工株式会社 | Impeller for turbo pump for water jet propulsion machine and turbo pump having the impeller |
DE4321260C1 (en) * | 1993-06-25 | 1995-03-09 | Westphal Dieter Dipl Ing Dipl | Blood pump as a centrifugal pump |
US6375419B1 (en) * | 1995-06-02 | 2002-04-23 | United Technologies Corporation | Flow directing element for a turbine engine |
-
1997
- 1997-05-28 DE DE19722353A patent/DE19722353A1/en not_active Withdrawn
-
1998
- 1998-05-18 DE DE59808172T patent/DE59808172D1/en not_active Expired - Fee Related
- 1998-05-18 ES ES98925611T patent/ES2196563T3/en not_active Expired - Lifetime
- 1998-05-18 US US09/424,786 patent/US6273677B1/en not_active Expired - Fee Related
- 1998-05-18 EP EP98925611A patent/EP0985098B1/en not_active Expired - Lifetime
- 1998-05-18 JP JP50017399A patent/JP3802572B2/en not_active Expired - Fee Related
- 1998-05-18 WO PCT/EP1998/002908 patent/WO1998054471A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9854471A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MD2246C2 (en) * | 2001-09-28 | 2004-02-29 | Сочиетатя Пе Акциунь "Молдовахидромаш" | Centrifugal pump blade branch |
MD2432C2 (en) * | 2001-09-28 | 2004-11-30 | Сочиетатя Пе Акциунь "Молдовахидромаш" | Branch of the rotodynamic pump |
Also Published As
Publication number | Publication date |
---|---|
WO1998054471A1 (en) | 1998-12-03 |
DE19722353A1 (en) | 1998-12-03 |
ES2196563T3 (en) | 2003-12-16 |
DE59808172D1 (en) | 2003-06-05 |
JP3802572B2 (en) | 2006-07-26 |
JP2001526757A (en) | 2001-12-18 |
US6273677B1 (en) | 2001-08-14 |
EP0985098B1 (en) | 2003-05-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0985098B1 (en) | Centrifugal pump with inflow guide device | |
DE69620635T2 (en) | PUMP WHEEL WITH SEPARATED, SLITTED RODS | |
EP2096316B1 (en) | Housing structuring for axial compressor in the hub area | |
EP2699803B1 (en) | Impeller for centrifugal pumps | |
EP3171970B1 (en) | Stirring member apparatus | |
DE102007056953B4 (en) | Turbomachine with Ringkanalwandausnehmung | |
EP2275643B1 (en) | Engine blade with excess front edge loading | |
DE2421237C2 (en) | Submersible pump | |
EP0131719B1 (en) | Adjustable guiding apparatus | |
WO2016083381A1 (en) | Centrifugal pump with axially discharging radial impeller | |
DE102004029109A1 (en) | Francis turbine wheel blades have scalloped trailing edge profile delaying the onset of cavitation | |
WO1995025895A1 (en) | Device for reducing noise in centrifugal pumps | |
DE69210718T2 (en) | Non-clogging pump | |
DE102007021056A1 (en) | stirrer | |
DE2360570A1 (en) | CENTRIFUGAL PUMP | |
DD288649A5 (en) | RADIAL FAN | |
CH317623A (en) | Shoveling for hoisting machines with centrifugal force | |
DE2258737A1 (en) | SIDE CHANNEL COMPRESSOR | |
DE3108507C2 (en) | ||
WO1998026176A1 (en) | Water turbine or water pump | |
WO2020126413A1 (en) | Turbocompressor with adapted meridian contour of the blades and compressor wall | |
EP1543239A1 (en) | Hydraulic machine rotor | |
EP1556616B1 (en) | Rotor for a centrifugal pump | |
CH650563A5 (en) | Diffuser in a centrifugal driven machine | |
DE323190C (en) | Blade for high-speed water turbines with a crescent-shaped meridional section |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19990901 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR GB IT NL |
|
17Q | First examination report despatched |
Effective date: 20020731 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): BE DE ES FR GB IT NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030502 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030531 |
|
REF | Corresponds to: |
Ref document number: 59808172 Country of ref document: DE Date of ref document: 20030605 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
BERE | Be: lapsed |
Owner name: *KSB A.G. Effective date: 20030531 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2196563 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20040203 |
|
EN | Fr: translation not filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20090527 Year of fee payment: 12 Ref country code: ES Payment date: 20090514 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20090522 Year of fee payment: 12 Ref country code: DE Payment date: 20090519 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090521 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V1 Effective date: 20101201 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100518 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100518 Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101201 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20110715 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110705 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100518 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100519 |