WO1998004837A1 - Dynamic wear ring - Google Patents
Dynamic wear ring Download PDFInfo
- Publication number
- WO1998004837A1 WO1998004837A1 PCT/GB1997/002068 GB9702068W WO9804837A1 WO 1998004837 A1 WO1998004837 A1 WO 1998004837A1 GB 9702068 W GB9702068 W GB 9702068W WO 9804837 A1 WO9804837 A1 WO 9804837A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wear ring
- ring
- housing
- static
- wear
- 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
Definitions
- the present invention relates to a dynamic wear ring, particularly for use with centrifugal pumps and even more particularly with centrifugal pumps operating under high pressure and having journal bearings.
- wear rings have been used in different pumping applications to reduce internal leakage within the pumps. They are positioned in the gap between impeller and pump housing and their construction is adapted to the geometry of the gap. The radial clearance depends on several factors including the production tolerances of the parts, the bearing clearance, and safety considerations as well as on the run-out in the pump housing and the bearing brackets .
- a sealing arrangement for sealing a wear ring against a pump housing, the sealing arrangement comprising: a first recess on a first surface of the wear ring, housing a static O-ring seal, and a second recess on a second surface of the wear ring perpendicular to the first surface and housing a dynamic seal, wherein the static O-ring seal is arranged to guide and stabilize the wear ring, and has no sealing functions.
- the diameter of the dynamic O-ring seal and the stiffness or lack of resiliency of the static O-ring is chosen to guide and stabilize the wear ring dynamically.
- At least one tangentially locking guiding pin is provided on the wear ring to prevent the wear ring from rotating, and a balancing hole passes through the wear ring for reducing friction forces, and balancing the static O- ring.
- a sealing arrangement according to the present invention allows for an increase in volumetric efficiency, particularly in high pressure pumps. It takes advantage of the radial forces created in the wear ring gap.
- a dynamic wear ring 1 is located in a gap between a wear ring housing 4 and an impeller shroud 11.
- a dynamic 0- ring 2 rests in a recess 12 in a side surface of the wear ring 1 and serves to control the back pressure on the wear ring 1.
- a static O-ring 3 is located in a recess 14 in an upper surface of the wear ring perpendicular to the surface housing dynamic O-ring 2. The stiffness of the static O-ring 3 and its frictional adherence to the adjacent surface 12 stabilizes the wear ring 1.
- the static O-ring 3 is balanced against the adjacent surface 15 of the housing 4 by the hydrostatic pressure in the gap between the pump impeller shroud 11 and the casing wall.
- the diameter of the dynamic O-ring determines the friction force.
- a passage 17 extends through the wear ring and acts to balance the friction forces. There are preferably a plurality of such passages and they may be formed by drilling through the wear ring 1.
- a guiding pin 6 is located to lock the wear ring l tangentially to the adjacent surface 10 of the housing 4.
- a Seeger locker 5 is located in the housing 4 , to secure the wear ring during handling and transportation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU37763/97A AU3776397A (en) | 1996-07-31 | 1997-07-31 | Dynamic wear ring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9616020.5A GB9616020D0 (en) | 1996-07-31 | 1996-07-31 | Dynamic weir ring |
GB9616020.5 | 1996-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998004837A1 true WO1998004837A1 (en) | 1998-02-05 |
Family
ID=10797754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/002068 WO1998004837A1 (en) | 1996-07-31 | 1997-07-31 | Dynamic wear ring |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3776397A (en) |
GB (2) | GB9616020D0 (en) |
WO (1) | WO1998004837A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10533570B2 (en) | 2015-12-07 | 2020-01-14 | Fluid Handling Llc | Opposed impeller wear ring undercut to offset generated axial thrust in multi-stage pump |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2008111007A (en) * | 2005-09-22 | 2009-10-27 | Алкоа оф Австралия Лимитед (AU) | SEALING ASSEMBLY |
DE502006004968D1 (en) | 2006-01-12 | 2009-11-12 | Sulzer Pumpen Ag | Turbomachine for a fluid with a radial sealing gap |
KR102545793B1 (en) * | 2017-05-01 | 2023-06-20 | 플루이드 핸들링 엘엘씨 | Double suction impeller, pump and suction impeller |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1925949A1 (en) * | 1969-05-20 | 1970-12-03 | Jemco Seals Inc | Leak retention for rotating machine parts |
US4018544A (en) * | 1976-02-20 | 1977-04-19 | Hale Fire Pump Company | Centrifugal pump |
EP0492603A2 (en) * | 1990-12-27 | 1992-07-01 | Ebara Corporation | Liner ring for a pump |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2842734C2 (en) * | 1978-09-30 | 1980-12-11 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Rotary slide valve, especially for a hydrostatic power steering device |
SE459755B (en) * | 1985-02-14 | 1989-07-31 | Flygt Ab | DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE |
-
1996
- 1996-07-31 GB GBGB9616020.5A patent/GB9616020D0/en active Pending
-
1997
- 1997-07-31 GB GB9716300A patent/GB2315824B/en not_active Expired - Fee Related
- 1997-07-31 AU AU37763/97A patent/AU3776397A/en not_active Abandoned
- 1997-07-31 WO PCT/GB1997/002068 patent/WO1998004837A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1925949A1 (en) * | 1969-05-20 | 1970-12-03 | Jemco Seals Inc | Leak retention for rotating machine parts |
US4018544A (en) * | 1976-02-20 | 1977-04-19 | Hale Fire Pump Company | Centrifugal pump |
EP0492603A2 (en) * | 1990-12-27 | 1992-07-01 | Ebara Corporation | Liner ring for a pump |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10533570B2 (en) | 2015-12-07 | 2020-01-14 | Fluid Handling Llc | Opposed impeller wear ring undercut to offset generated axial thrust in multi-stage pump |
Also Published As
Publication number | Publication date |
---|---|
GB2315824B (en) | 2000-02-16 |
GB9616020D0 (en) | 1996-09-11 |
GB2315824A (en) | 1998-02-11 |
AU3776397A (en) | 1998-02-20 |
GB9716300D0 (en) | 1997-10-08 |
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