AU593534B2 - A seal arrangement for a pump - Google Patents
A seal arrangement for a pump Download PDFInfo
- Publication number
- AU593534B2 AU593534B2 AU52920/86A AU5292086A AU593534B2 AU 593534 B2 AU593534 B2 AU 593534B2 AU 52920/86 A AU52920/86 A AU 52920/86A AU 5292086 A AU5292086 A AU 5292086A AU 593534 B2 AU593534 B2 AU 593534B2
- Authority
- AU
- Australia
- Prior art keywords
- impeller
- slot
- seal
- inner portion
- depth
- 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.)
- Ceased
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Description
593534 DRIGiNAL S8 9 a 9* O b #9 a a *99a *9 9c 9* *i S This (Iryu;]t; cpu;; ~t1 I~l n 1 COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952-1969 COMPLETE SPECIFICATION FOR THE INVENTION ENTITLED "A SEAL ARRANGEMENT FOR A PUMP" The following statement is a full description of this invention, including the best method of performing it known to us:tr' 7 1 It_ 4 rr
S\
~cIk i II -2- This invention relates to a seal arrangement for preventing leakage between an imprller and an associated non-rotating part of a pump.
Pumps such as centrifugal pumps, have a rotating impeller which draws in the pumped liquid medium at the centre of the impeller and discharges it via the periphery. It is important that the inlet of the impeller fits closely with the inlet of the pump housing to prevent the pumped medium from flowing back to the inlet. Such a backflow creates efficiency losses and turbulence at the inlet.
In order to obtain the desired sealing between the impeller and the non-rotating part of the pump, it is known to arrange a rubber wear part on the non-rotating part which contacts the impeller during rotation in this way an effective sealing Is obtained as long as the wear part is intact.
When the pumped medium contains abrasive material, such as sand and sludge cuttings, the lifetime of the wear part becomes very short and as a result the pump must be taken out of service frequently for maintenance.
An object of the present invention is to provide a seal arrangement 0.04 in which the rubber wear parts are replaced wear parts of a more wear resistant material thereby extending the life of the seal and reducing the frequency of maintenance.
This object is achieved by adapting the impeller and preferably the non-rotatina part to receive seal rings made of hard metal or ceramic, which together form a mechanical seal effectively preventing the pump medium from leaking back to the inlet, and which have very good wear S resistance. At least one of the seal rings is held in position by a resilient 0-ring which aliws easy replacement and also eliminates problems S which may otherwise occur if the seal ring surface is not sufficiently S' planar.
In order that the invention may be readily understood, an embodiment thereof will now be described with reference to the drawing.
Referring to the drawing, there is shown an impeller 1 and part of a pump housing 2 associated therewith. The axis of rotation of the impeller Is depicted as The radial direction is therfore depicted by arrow A mechanical seal comprising a first seal ring 3 arranged about part of impeller 1, and a second seal ring arranged In a groove within housing 2. Seal rings 3 and 4 are made of hard metal or ceramic. A resilient 0-rlng 5 Is arranged In a circumferential slot 6 provided In Impet"ar 1.
Rs The slot 6 is perpendicular to the ax. nf rotation Similarly, seal S I'ing 3 and o-ring 5 lie in a plane normal to the axis of rotation of
/I
iII~~ 3- Impeller 1. The configuration of slot 6 is such that the slot is deeper in the radial direction some distance from the slot opening and radially least deep near the opening.
When mounting seal ring 3 on impeller 1, the O-ring is first placed In slot 6 and then seal ring 3 is pressed over impeller 1 about and radially outward of the O-rlng. As a result 0-ring 6 deforms and holds seal ring 3 in position. Due to the shape of slot 6, the seal ring 3 is held firmly, becoming even firmer under pressure. Removal of the seal ring 3 Is resisted by the deformation of the 0-ring into the narrow or radially shallow opening of the slot 6.
It will be understood that seal ring 4 may be mounted in the same way.
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Claims (4)
1. In combination, an impeller having an axis of rotation and comprising a circumferential slot perpendicular to the axis of rotation and formed on the impeller surface about an end of the impeller which is adjacent to a sealing surface on a housing in which the impeller is to operate, the slot having an opening and an inner portion and varying in radial depth from a minimum depth near the opening to a maximum depth in the inner portion; a wear-resistant first annular seal radially outward of the slot, the first annular seal forming a sealing surface which is perpendicular to the impeller's axis of rotation; a resilient 0-ring interposed between the impeller and the seal and located within the slot; and. 1yh& a statickannular seal mounted on a non-rotating housing in which the impeller rotates, the static seal contacting the sealing surface of the first annular seal.
2. The apparatus of Claim 1 wherein the static seal is retained by an 0-ring in a circumferential slot formed on the housing, the slot having an opening and an inner portion and varying in radial depth from a minimum C depth near the ope'ning to a maximum depth in the inner portion. c
3. A sealAsubstantially as hereinbefore described with reference to the accompanying drawing,
4. A centrigual pump as hereinbefore described with reference to the accompanying drawing. DATED this NINTH day of NOVEMBER 1989 SITT Industries, Inc. Patent Attorneys for the Applicant SPRUSON FERGUSON I VZ TLH/3431T L2
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8500691 | 1985-02-14 | ||
| SE8500691A SE459755B (en) | 1985-02-14 | 1985-02-14 | DEVICE TO ACHIEVE A SEAL BETWEEN A ROTARY PUMP WHEEL AND A SURROUNDING PUMP HOUSE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU5292086A AU5292086A (en) | 1986-08-21 |
| AU593534B2 true AU593534B2 (en) | 1990-02-15 |
Family
ID=20359116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU52920/86A Ceased AU593534B2 (en) | 1985-02-14 | 1986-02-03 | A seal arrangement for a pump |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0192621B1 (en) |
| JP (1) | JPS61192896A (en) |
| AU (1) | AU593534B2 (en) |
| DE (1) | DE3675032D1 (en) |
| SE (1) | SE459755B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9616020D0 (en) * | 1996-07-31 | 1996-09-11 | Framo Dev Ltd | Dynamic weir ring |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU476959B2 (en) * | 1973-09-18 | 1976-10-07 | Westinghouse Electric Corporation | Improvements in or relating to rotating element fluid seal for centrifugal compressor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE142214C (en) * | ||||
| US1521226A (en) * | 1921-01-28 | 1924-12-30 | Paul G Bogdanoff | Centrifugal pump |
| DE422681C (en) * | 1923-03-21 | 1925-12-09 | Edwin Letts Oliver | Gap seal for turbines, pumps and similar centrifugal machines |
| AU8739075A (en) * | 1974-12-24 | 1977-06-16 | Warman Int Ltd | Self centring festrictor bush |
| US4018544A (en) * | 1976-02-20 | 1977-04-19 | Hale Fire Pump Company | Centrifugal pump |
-
1985
- 1985-02-14 SE SE8500691A patent/SE459755B/en not_active IP Right Cessation
-
1986
- 1986-02-03 AU AU52920/86A patent/AU593534B2/en not_active Ceased
- 1986-02-04 DE DE8686850033T patent/DE3675032D1/en not_active Expired - Fee Related
- 1986-02-04 EP EP86850033A patent/EP0192621B1/en not_active Expired - Lifetime
- 1986-02-14 JP JP61029187A patent/JPS61192896A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU476959B2 (en) * | 1973-09-18 | 1976-10-07 | Westinghouse Electric Corporation | Improvements in or relating to rotating element fluid seal for centrifugal compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3675032D1 (en) | 1990-11-29 |
| JPH0217719B2 (en) | 1990-04-23 |
| JPS61192896A (en) | 1986-08-27 |
| SE8500691D0 (en) | 1985-02-14 |
| SE459755B (en) | 1989-07-31 |
| EP0192621A1 (en) | 1986-08-27 |
| SE8500691L (en) | 1986-08-15 |
| EP0192621B1 (en) | 1990-10-24 |
| AU5292086A (en) | 1986-08-21 |
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