EP0257358A3 - Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps - Google Patents
Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps Download PDFInfo
- Publication number
- EP0257358A3 EP0257358A3 EP87111178A EP87111178A EP0257358A3 EP 0257358 A3 EP0257358 A3 EP 0257358A3 EP 87111178 A EP87111178 A EP 87111178A EP 87111178 A EP87111178 A EP 87111178A EP 0257358 A3 EP0257358 A3 EP 0257358A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- inlet
- ring
- stage
- sealing ring
- 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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Mechanical Sealing (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87111178T ATE65116T1 (en) | 1986-08-08 | 1987-08-01 | HYDRAULIC SEAL FOR IMPELLER INLET OF SINGLE AND MULTISTAGE PUMPS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8630733U IT209616Z2 (en) | 1986-08-08 | 1986-08-08 | HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS. |
IT3073386U | 1986-08-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0257358A2 EP0257358A2 (en) | 1988-03-02 |
EP0257358A3 true EP0257358A3 (en) | 1988-11-09 |
EP0257358B1 EP0257358B1 (en) | 1991-07-10 |
Family
ID=11231522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87111178A Expired - Lifetime EP0257358B1 (en) | 1986-08-08 | 1987-08-01 | Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0257358B1 (en) |
AT (1) | ATE65116T1 (en) |
DE (1) | DE3771284D1 (en) |
IT (1) | IT209616Z2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3939156C2 (en) * | 1989-11-27 | 1994-01-27 | Grundfos International A S Bje | Compound impeller for a centrifugal pump |
DE4330098A1 (en) * | 1993-09-06 | 1995-03-09 | Klein Schanzlin & Becker Ag | Guide device designed as a molded sheet metal part |
DE19607292C2 (en) * | 1996-02-27 | 2000-06-08 | Grundfos A S Bjerringbro | Housing with guide device for one pump stage of a multi-stage centrifugal pump |
DE10260443A1 (en) * | 2002-12-21 | 2004-07-01 | Ksb Aktiengesellschaft | Housing for multi-stage rotary pump is fabricated from sheet metal and has impeller wheel separated from the housing walls by a seal |
GB0412231D0 (en) * | 2004-06-02 | 2004-07-07 | Weir Pumps Ltd | Mechanical assembly and deformable element therefor |
EP2148096B1 (en) * | 2008-07-25 | 2013-04-10 | Grundfos Management A/S | Centrifugal pump |
IT1398921B1 (en) | 2010-03-25 | 2013-03-28 | Caprari Spa | CENTRIFUGAL PUMP. |
EP3181909B1 (en) | 2015-12-14 | 2020-04-08 | Wilo Se | Compact sealing ring unit |
EP3460253A1 (en) * | 2017-09-26 | 2019-03-27 | Xylem IP Management S.à.r.l. | Pump with a wear ring |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1839514A (en) * | 1929-01-23 | 1932-01-05 | Pacific Pump Works | Device for preventing short circuiting flow around impellers |
US2644403A (en) * | 1952-03-05 | 1953-07-07 | Ingersoll Rand Co | Device for preventing clogging in centrifugal pumps |
DE1653713B2 (en) * | 1966-08-09 | 1972-11-23 | Grundfos A/S. Bjerringbro (Dänemark) | Centrifugal pump |
FR2269414A1 (en) * | 1974-04-30 | 1975-11-28 | Asea Ab | |
DE3207327A1 (en) * | 1982-03-01 | 1983-09-08 | Heinz Konrad Prof. Dr.-Ing. 7050 Waiblingen Müller | Shaft seal |
EP0167837A1 (en) * | 1984-06-07 | 1986-01-15 | LOWARA S.p.A. | Seal device for interposition between a pump body and pump impeller |
-
1986
- 1986-08-08 IT IT8630733U patent/IT209616Z2/en active
-
1987
- 1987-08-01 DE DE8787111178T patent/DE3771284D1/en not_active Expired - Lifetime
- 1987-08-01 EP EP87111178A patent/EP0257358B1/en not_active Expired - Lifetime
- 1987-08-01 AT AT87111178T patent/ATE65116T1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1839514A (en) * | 1929-01-23 | 1932-01-05 | Pacific Pump Works | Device for preventing short circuiting flow around impellers |
US2644403A (en) * | 1952-03-05 | 1953-07-07 | Ingersoll Rand Co | Device for preventing clogging in centrifugal pumps |
DE1653713B2 (en) * | 1966-08-09 | 1972-11-23 | Grundfos A/S. Bjerringbro (Dänemark) | Centrifugal pump |
FR2269414A1 (en) * | 1974-04-30 | 1975-11-28 | Asea Ab | |
DE3207327A1 (en) * | 1982-03-01 | 1983-09-08 | Heinz Konrad Prof. Dr.-Ing. 7050 Waiblingen Müller | Shaft seal |
EP0167837A1 (en) * | 1984-06-07 | 1986-01-15 | LOWARA S.p.A. | Seal device for interposition between a pump body and pump impeller |
Also Published As
Publication number | Publication date |
---|---|
EP0257358B1 (en) | 1991-07-10 |
IT8630733V0 (en) | 1986-08-08 |
DE3771284D1 (en) | 1991-08-14 |
ATE65116T1 (en) | 1991-07-15 |
EP0257358A2 (en) | 1988-03-02 |
IT209616Z2 (en) | 1988-10-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2101085A1 (en) | Blood pump | |
MY101751A (en) | Improved impeller | |
ES8504366A1 (en) | Shaft seals. | |
SE8704144L (en) | GUEST SEALING DEVICE FOR AN AXLE | |
DE3371929D1 (en) | Fuel injection pump | |
EP0257358A3 (en) | Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps | |
JPS6487975A (en) | Sealing device for pump | |
GB955438A (en) | Centrifugal pump | |
GB1251686A (en) | ||
SE8303566L (en) | CENTRIFUGAL PUMPS SEAL SEAL AND PROCEDURE FOR ITS EXECUTION | |
ES8201271A1 (en) | Radial piston pump | |
GR3000651T3 (en) | Process and installation to cause circulation of fluids by pumping | |
ES8406654A1 (en) | Primary pump for a pressurized water reactor, having a seal arrangement for its shaft. | |
EP0380990A3 (en) | Reversible turbine pump | |
GB1391166A (en) | Axial flow turbine | |
ES2014088A6 (en) | Turbine shaft axial load protection system | |
CA1157062A (en) | Coal slurry pump seal assembly | |
WO1995027844A3 (en) | Twin rotor expansible/contractible chamber assembly | |
EP0391488A3 (en) | Vented static seal assembly | |
FR2296124A1 (en) | Flexible bearing support for pump shaft - reduces leakage by allowing bearing to work with minimum clearance | |
SU1097826A1 (en) | Multistage peripheral pump | |
JPS5712164A (en) | Air supply device to rotor | |
JPS57191488A (en) | Compressor | |
GB1526936A (en) | Sealing means | |
GB784928A (en) | Rotary pump with sealed impeller hub |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19890317 |
|
17Q | First examination report despatched |
Effective date: 19890911 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19910710 Ref country code: NL Effective date: 19910710 Ref country code: LI Effective date: 19910710 Ref country code: CH Effective date: 19910710 Ref country code: BE Effective date: 19910710 Ref country code: AT Effective date: 19910710 |
|
REF | Corresponds to: |
Ref document number: 65116 Country of ref document: AT Date of ref document: 19910715 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3771284 Country of ref document: DE Date of ref document: 19910814 |
|
ET | Fr: translation filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19910831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19911010 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
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 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP Ref country code: FR Ref legal event code: CJ Ref country code: FR Ref legal event code: CD |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20060731 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20060929 Year of fee payment: 20 |