IT209616Z2 - HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS. - Google Patents
HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE PUMPS.Info
- Publication number
- IT209616Z2 IT209616Z2 IT8630733U IT3073386U IT209616Z2 IT 209616 Z2 IT209616 Z2 IT 209616Z2 IT 8630733 U IT8630733 U IT 8630733U IT 3073386 U IT3073386 U IT 3073386U IT 209616 Z2 IT209616 Z2 IT 209616Z2
- Authority
- IT
- Italy
- Prior art keywords
- impeller
- ring
- inlet
- liquid
- face
- 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
- F04D29/08—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
The hydraulic sealing ring (1) on the inlet (5) of the impeller (6), particularly for single-stage and multistage pumps is made in a rubber-like material the inner face (3) whereof couples to the outer surface (4) of the inlet (5) of an impeller (6). The ring (1) has substantially radial openings which connect a shimming face to the outer one to allow a slight injection of liquid bled from the higher-pressure chamber in output from the impeller blades in the shimming region and to allow the creation and the maintainance of an extremely thin layer of liquid adapted to ensure a lubrication of the scraping surfaces with a reduced leakage towards the lower-pressure region at the input of the impeller (6) and to counterbalance the radial force which tends to press the ring around the inlet (5) of the impeller (6), said force being generated by the pressure of the liquid acting on the outer face (4) of said ring.
Priority Applications (4)
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. |
DE8787111178T DE3771284D1 (en) | 1986-08-08 | 1987-08-01 | HYDRAULIC SEALING RING FOR THE WHEEL INLET OF SINGLE AND MULTI-STAGE PUMPS. |
EP87111178A EP0257358B1 (en) | 1986-08-08 | 1987-08-01 | Hydraulic sealing ring on the inlet of the impeller in single-stage and multistage pumps |
AT87111178T ATE65116T1 (en) | 1986-08-08 | 1987-08-01 | HYDRAULIC SEAL FOR IMPELLER INLET OF SINGLE AND MULTISTAGE PUMPS. |
Applications Claiming Priority (1)
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. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8630733V0 IT8630733V0 (en) | 1986-08-08 |
IT209616Z2 true IT209616Z2 (en) | 1988-10-24 |
Family
ID=11231522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8630733U IT209616Z2 (en) | 1986-08-08 | 1986-08-08 | HYDRAULIC SEAL RING ON THE MOUTH OF THE IMPELLER IN SINGLE AND MULTI-STAGE 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 |
Family Cites Families (5)
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 |
SE396454C (en) * | 1974-04-30 | 1978-01-09 | Asea Ab | HIGH PRESSURE PRESS |
DE3207327A1 (en) * | 1982-03-01 | 1983-09-08 | Heinz Konrad Prof. Dr.-Ing. 7050 Waiblingen Müller | Shaft seal |
IT1180991B (en) * | 1984-06-07 | 1987-09-23 | Lowara Spa | SEALING DEVICE INTERPOSED BETWEEN IMPELLER AND PUMP BODY |
-
1986
- 1986-08-08 IT IT8630733U patent/IT209616Z2/en active
-
1987
- 1987-08-01 AT AT87111178T patent/ATE65116T1/en not_active IP Right Cessation
- 1987-08-01 EP EP87111178A patent/EP0257358B1/en not_active Expired - Lifetime
- 1987-08-01 DE DE8787111178T patent/DE3771284D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3771284D1 (en) | 1991-08-14 |
IT8630733V0 (en) | 1986-08-08 |
ATE65116T1 (en) | 1991-07-15 |
EP0257358B1 (en) | 1991-07-10 |
EP0257358A3 (en) | 1988-11-09 |
EP0257358A2 (en) | 1988-03-02 |
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