WO2000077405A1 - Entlastungseinrichtung fur mehrstufige kreiselpumpen - Google Patents
Entlastungseinrichtung fur mehrstufige kreiselpumpen Download PDFInfo
- Publication number
- WO2000077405A1 WO2000077405A1 PCT/EP2000/004754 EP0004754W WO0077405A1 WO 2000077405 A1 WO2000077405 A1 WO 2000077405A1 EP 0004754 W EP0004754 W EP 0004754W WO 0077405 A1 WO0077405 A1 WO 0077405A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axial
- thrust
- centrifugal pump
- relief
- gimbal ring
- Prior art date
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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- 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
- F04D29/041—Axial thrust balancing
- F04D29/0416—Axial thrust balancing balancing pistons
Definitions
- the invention relates to a device for receiving the axial thrust of a multi-stage centrifugal pump, with a relief device which has one or more axial gaps and one or more radial gaps and in which an injection current is passed over the gaps, and with an axial bearing which absorbs the remaining thrust, the gimbal serving to compensate for misalignment is assigned to the axial bearing e.
- a high degree of reliability of the relief device with low leakage losses is achieved according to the invention in that the relief device is designed in such a way that there is a residual thrust in all operating conditions Direction of the suction side of the centrifugal pump acts, and that the cardamic ring (10) is dimensioned so that it is elastically deformed by the residual thrust, the spring constant of the cardamic ring (10) having such a characteristic that, starting from a maximum Gap width (s) in the idle state of the centrifugal pump, the axial (n) splat (s) (8) under operating conditions spurts / sweat to a minimum width, at which touching the respective axial gap (8) limiting throat still is avoided KSBA corporation
- the invention relates to a device for absorbing the axial thrust of a multi-stage centrifugal pump, having a relief device which has one or more axial gaps and one or more radial gaps and in which a relief flow is conducted over the gaps, and with an axial bearing which absorbs the remaining residual thrust, wherein the axial bearing is assigned a gimbal to compensate for misalignment.
- a common feature of all three versions is a relief current conducted via gaps.
- the relief flow which is mostly returned to the inlet of the centrifugal pump, represents a leakage loss, which attempts are made to minimize the gap widths as small as possible.
- care must be taken to ensure that rubbing against the moving parts on the stationary parts of the centrifugal pump is avoided as far as possible under all operating conditions. Rubbing the pump rotor in the housing can lead to seizures on opposite surfaces and thus to failure of the centrifugal pump.
- the gap losses caused by the relief current differ in the three versions.
- the radial gap surrounding the simple relief piston results in a large gap current and thus a large drop in the efficiency of the centrifugal pump.
- Such a thrust bearing generally does not need the version with a relief washer, since the relief washer is self-regulating. Since the essential axial gap between the relief disk and the non-rotating counter disk adjusts itself very closely, the leakage loss of this embodiment also remains relatively small. However, in centrifugal pumps with high final pressures and high outputs in a transient mode of operation, the relief disk can rub against the counter disk. However, the operational safety of such pumps is no longer guaranteed.
- the invention has for its object to provide a relief device that has only minimal leakage losses with high reliability.
- the object is achieved in that the relief device is designed so that there is a residual thrust in all operating conditions, which acts in the direction of the suction side of the centrifugal pump, and that the gimbal ring is dimensioned so that it is elastically deformed by the residual thrust, the spring constant of the gimbal ring having such a characteristic that, starting from a maximum gap width in the idle state of the centrifugal pump, the axial gap closes under operating conditions to a minimum width at which contact of the axial gap-limiting surfaces is still avoided. If the relief device has a stepped piston with several axial gaps, the condition mentioned applies to all axial gaps.
- the invention is not only to be used in relief devices with double pistons or multi-stage pistons. It can also be used for relief washers.
- An additional axial bearing with a gimbal ring causes increased effort in a device with a relief disk.
- this means operational reliability for centrifugal pumps with high final pressures and great performance is to be guaranteed even with a transient driving style, the effort is at least justified there.
- the invention can be used with advantage particularly in cooperation with a hydrodynamic axial bearing.
- the invention is explained in more detail using an exemplary embodiment.
- the drawing shows a section of a multi-stage centrifugal pump shown in section.
- a shaft 2 In the housing 1 of the centrifugal pump, a shaft 2 is supported, which carries several impellers 3. Only two of the impellers 3 can be seen in the drawing.
- the double piston 4 of a relief device according to the invention is fastened on the shaft 2.
- the double piston 4 is surrounded by a housing part 5 with which it forms two radial gaps 6 and 7.
- the axial gap 8 has a variable width s.
- the shaft 2 is received by a hydrodynamic axial bearing 9.
- a gimbal ring 10 is assigned to the axial bearing 9.
- the gimbal ring 10 is initially used in a known manner to compensate for misalignments that are unavoidable when installing a multi-stage centrifugal pump. What is new, however, is that the gimbal ring 10 is dimensioned such that it is elastically deformed by the residual thrust occurring in the centrifugal pump.
- the spring constant of the gimbal ring 10 is adapted to the other conditions of the relief device:
- the relief device is designed so that there is a residual thrust in all operating states of the centrifugal pump, which acts in the direction of the suction side.
- the gap 8 is now closed by an elastic deformation of the gimbal ring 10 under operating conditions to a predetermined minimum width at which contact of the surfaces of the double piston 4 and 4 delimiting the gap 8 of the housing part 5 still is avoided.
- the relief device according to the invention allows the axial gap 8 to have a self-regulating function, as is the case with a relief disk in a similar way.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00941982T ATE246318T1 (de) | 1999-06-15 | 2000-05-25 | Entlastungseinrichtung fur mehrstufige kreiselpumpen |
BR0011590-8A BR0011590A (pt) | 1999-06-15 | 2000-05-25 | Dispositivo para absorção do empuxo axial de uma bomba centrìfuga de múltiplos estágios |
EP00941982A EP1185795B1 (de) | 1999-06-15 | 2000-05-25 | Entlastungseinrichtung fur mehrstufige kreiselpumpen |
DE50003122T DE50003122D1 (de) | 1999-06-15 | 2000-05-25 | Entlastungseinrichtung fur mehrstufige kreiselpumpen |
US10/014,836 US6568901B2 (en) | 1999-06-15 | 2001-12-14 | Balancer for multistage centrifugal pumps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19927135.6 | 1999-06-15 | ||
DE19927135A DE19927135A1 (de) | 1999-06-15 | 1999-06-15 | Entlastungseinrichtung für mehrstufige Kreiselpumpen |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/014,836 Continuation US6568901B2 (en) | 1999-06-15 | 2001-12-14 | Balancer for multistage centrifugal pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000077405A1 true WO2000077405A1 (de) | 2000-12-21 |
Family
ID=7911219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/004754 WO2000077405A1 (de) | 1999-06-15 | 2000-05-25 | Entlastungseinrichtung fur mehrstufige kreiselpumpen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6568901B2 (de) |
EP (1) | EP1185795B1 (de) |
AT (1) | ATE246318T1 (de) |
BR (1) | BR0011590A (de) |
DE (2) | DE19927135A1 (de) |
WO (1) | WO2000077405A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254041A1 (de) * | 2002-11-20 | 2004-06-03 | Ksb Aktiengesellschaft | Verfahren und Vorichtung zur Störungsfrüherkennung bei Kreiselpumpen |
US11536274B2 (en) | 2018-07-02 | 2022-12-27 | KSB SE & Co. KGaA | Arrangement for receiving the axial thrust of a centrifugal pump |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50206223D1 (de) * | 2001-10-22 | 2006-05-18 | Sulzer Pumpen Ag | Wellenabdichtungsanordnung für eine Pumpe zur Förderung heisser Fluide |
CA2736952C (en) | 2008-09-10 | 2016-11-29 | Pentair Pump Group, Inc. | High-efficiency, multi-stage centrifugal pump and method of assembly |
IT1392143B1 (it) * | 2008-09-15 | 2012-02-22 | Pompe Garbarino S P A | Pompa centrifuga multistadio con tamburo di bilanciamento idraulico a trafilamento controllato. |
DE102013223806A1 (de) | 2013-11-21 | 2015-05-21 | Ksb Aktiengesellschaft | Entlastungseinrichtung |
EP3171033A1 (de) * | 2015-11-19 | 2017-05-24 | Grundfos Holding A/S | Mehrstufige kreiselpumpe mit gehäuseöffnung zur wartung eines axialschub-kolbens |
EP3412915B1 (de) * | 2017-06-09 | 2019-12-25 | Xylem Europe GmbH | Selbsteinstellendes trommelsystem |
DE102019001120A1 (de) | 2019-02-15 | 2020-08-20 | KSB SE & Co. KGaA | Entlastungseinrichtung |
EP3832143A1 (de) * | 2019-12-02 | 2021-06-09 | Sulzer Management AG | Pumpe mit einer abhebevorrichtung |
DE102020133327B4 (de) | 2020-12-14 | 2023-01-19 | KSB SE & Co. KGaA | Pumpenanordnung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE886250C (de) * | 1951-11-10 | 1953-08-13 | Klein | Abhebevorrichtung fuer Entlastungsscheiben von Kreiselmaschinen |
US3393947A (en) * | 1966-04-13 | 1968-07-23 | United Aircraft Corp | Two-directional axial thrust balancer |
JPH0914181A (ja) * | 1995-06-27 | 1997-01-14 | Ishikawajima Harima Heavy Ind Co Ltd | バランスピストン機構を備えたターボポンプ |
RU2083860C1 (ru) * | 1988-05-23 | 1997-07-10 | Конструкторское бюро химавтоматики | Турбонасосный агрегат |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE872136C (de) * | 1949-09-17 | 1953-03-30 | Basf Ag | Lagerung fuer ein- und mehrstufige Stroemungsmaschinen mit stehend, etwa senkrecht angeordneter Laeuferwelle |
GB1211243A (en) * | 1966-11-12 | 1970-11-04 | Zabranska Fabryka Masz Gornicz | Axial balancing arrangement in a rotodynamic pump |
USRE28540E (en) * | 1971-02-02 | 1975-09-02 | Composite knockdown pump | |
DE3023219A1 (de) * | 1980-06-21 | 1982-01-07 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Turbopumpe |
DE29500744U1 (de) * | 1995-01-18 | 1996-05-15 | Sihi Ind Consult Gmbh | Strömungsmaschine mit Entlastungskolben |
DE19640734B4 (de) * | 1996-10-02 | 2005-06-23 | Ksb Ag | Axiallager für eine Gliederpumpe |
US5980114A (en) * | 1997-01-20 | 1999-11-09 | Oklejas, Jr.; Eli | Thrust bearing |
-
1999
- 1999-06-15 DE DE19927135A patent/DE19927135A1/de not_active Withdrawn
-
2000
- 2000-05-25 AT AT00941982T patent/ATE246318T1/de not_active IP Right Cessation
- 2000-05-25 EP EP00941982A patent/EP1185795B1/de not_active Expired - Lifetime
- 2000-05-25 DE DE50003122T patent/DE50003122D1/de not_active Expired - Lifetime
- 2000-05-25 WO PCT/EP2000/004754 patent/WO2000077405A1/de active IP Right Grant
- 2000-05-25 BR BR0011590-8A patent/BR0011590A/pt not_active IP Right Cessation
-
2001
- 2001-12-14 US US10/014,836 patent/US6568901B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE886250C (de) * | 1951-11-10 | 1953-08-13 | Klein | Abhebevorrichtung fuer Entlastungsscheiben von Kreiselmaschinen |
US3393947A (en) * | 1966-04-13 | 1968-07-23 | United Aircraft Corp | Two-directional axial thrust balancer |
RU2083860C1 (ru) * | 1988-05-23 | 1997-07-10 | Конструкторское бюро химавтоматики | Турбонасосный агрегат |
JPH0914181A (ja) * | 1995-06-27 | 1997-01-14 | Ishikawajima Harima Heavy Ind Co Ltd | バランスピストン機構を備えたターボポンプ |
Non-Patent Citations (2)
Title |
---|
"KREISELPUMPEN LEXIKON", July 1989, KSB AG, FRANKENTHAL, XP002149200 * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 05 30 May 1997 (1997-05-30) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254041A1 (de) * | 2002-11-20 | 2004-06-03 | Ksb Aktiengesellschaft | Verfahren und Vorichtung zur Störungsfrüherkennung bei Kreiselpumpen |
US6877947B2 (en) | 2002-11-20 | 2005-04-12 | Ksb Aktiengesellschaft | Method and apparatus for early fault detection in centrifugal pumps |
DE10254041B4 (de) * | 2002-11-20 | 2011-07-07 | KSB Aktiengesellschaft, 67227 | Verfahren und Vorichtung zur Störungsfrüherkennung bei Kreiselpumpen |
US11536274B2 (en) | 2018-07-02 | 2022-12-27 | KSB SE & Co. KGaA | Arrangement for receiving the axial thrust of a centrifugal pump |
Also Published As
Publication number | Publication date |
---|---|
US6568901B2 (en) | 2003-05-27 |
EP1185795B1 (de) | 2003-07-30 |
DE50003122D1 (de) | 2003-09-04 |
EP1185795A1 (de) | 2002-03-13 |
DE19927135A1 (de) | 2000-12-21 |
BR0011590A (pt) | 2002-04-23 |
ATE246318T1 (de) | 2003-08-15 |
US20020114713A1 (en) | 2002-08-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2000077405A1 (de) | Entlastungseinrichtung fur mehrstufige kreiselpumpen | |
EP0874159A2 (de) | Reibungsvakuumpumpe mit einer Gaedepumpenstufe | |
EP3071840B1 (de) | Entlastungseinrichtung | |
DE3103595C2 (de) | Schaufelloser Diffusor einer Strömungs-Arbeitsmaschine | |
EP1252445B1 (de) | Turbomolekularpumpe | |
DE2423707C3 (de) | Pumpeneinheit für die Brennstoff-Versorgungsanlage eines Gasturbinentriebwerks | |
EP1759092B1 (de) | Einrichtung zur detektion eines wellenbruchs an einer gasturbine sowie gasturbine | |
DE3319000C2 (de) | ||
WO1999060275A1 (de) | Reibungsvakuumpumpe mit stator und rotor | |
EP0323834A2 (de) | Dichtungsfreie Pumpe | |
DE102009037443B4 (de) | Selbstansaugende Flügelzellenpumpe | |
EP1017944B1 (de) | Compoundpumpe | |
EP1625304B1 (de) | Mehrstufige kreiselpumpe | |
EP3555480A1 (de) | Kreiselpumpe mit radialem laufrad | |
EP0254721B1 (de) | Flügelzellenpumpe | |
WO1995004221A1 (de) | Zweistufige drehschiebervakuumpumpe | |
DE735957C (de) | Zweistufige Kreiselpumpe, insbesondere Kondensatpumpe | |
DE3232473A1 (de) | Kreiselpumpe mit spaltrohr-magnetkupplung | |
EP1943423B1 (de) | Pumpenanordnung | |
DE9206053U1 (de) | Läufer für eine Kreiselpumpe | |
DE112021000460T5 (de) | Lager und Turbolader | |
DE4005923C2 (de) | Kreiselpumpe mit Laufrädern unterschiedlicher Drehzahl | |
DE3414910A1 (de) | Kippsegment - gleitlager | |
EP1541871B1 (de) | Seitenkanalpumpstufe | |
CH315988A (de) | Mehrstufiger Zentrifugalverdichter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): BR CN IN RU UA US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: IN/PCT/2001/1107/KOL Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2000941982 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10014836 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000941982 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 2000941982 Country of ref document: EP |