AU610287B2 - Elastomeric pump casing seal - Google Patents
Elastomeric pump casing seal Download PDFInfo
- Publication number
- AU610287B2 AU610287B2 AU25765/88A AU2576588A AU610287B2 AU 610287 B2 AU610287 B2 AU 610287B2 AU 25765/88 A AU25765/88 A AU 25765/88A AU 2576588 A AU2576588 A AU 2576588A AU 610287 B2 AU610287 B2 AU 610287B2
- Authority
- AU
- Australia
- Prior art keywords
- casing
- seal
- casing part
- elastomeric
- walls
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
- F16J15/106—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure homogeneous
-
- 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
- F04D29/086—Sealings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
I i :I
AUSTRALIA
PATENTS ACT 1952 r COMPLETE SPECIFICATt
(ORIGINAL)
FOR OFFICE USE Application Number: Lodged: Complete Specification Lodged: Accepted: Published: ~ILII-~WPT~ CLi\~ DIXi=-I~OCllln CLYi~Tp-Cyr~ 9 .,,,,Uufia 41 r~i;cr ~9 ~vr~u Ni iUI r o *.Priority: O. Related Art: a o t TO BE COMPLETED BY APPLICANT S~ fame of Applicant: 0 Sa ddress of Applicant: Actual Inventor: 0 f O ,Address for Service: o o 0 0 WARMAN INTERNATIONAL LIMITED 1 Marden Street, Artarmon, NSW 2064, A ost-rsVt4 Craig lan Walker ARTHUR S. CAVE CO.
Patent Trade Mark Attorneys Level 10 Barrack Street SYDNEY N.S.W. 2000
AUSTRALIA
o*-omplete Specification for the invention entitled ELASTOMERIC PUMP CASING SEAL.
The following statement is a full description of this invention including the best method of performing it known to me:- 1 ASC 49 S003~773 S3732 1/l li' 3t8 I_ 0158p:SC 2 t The present invention relates to a method of sealing the casing joint or joints of a two or more piece casing of a centrifugal pump and in particular to such joints for centrifugal slurry pump.
Because conventional slurry pumps are required to withstand brasive conditions it is necessary that they are constructed of alloys of high hardness thus making machining of the parts expensive and difficult. To ensure correct alignment and sealing, it is necessary that the casing joint of these pumps are machined to exact requirement. This, therefore, increases the cost in the production of such pumps.
V Typically, prior art methods for sealing such joints are shown in figures 1 to 3.
Figure 1 illustrates a seal 4 which is located into a recess in the frame platea i. The mating surfaces 14 and 15 of the volute casing 2 and the side liner 3, have to be machined to exact tolerances to ensure an accurate fit.
The seal 4 is compressed against the outer surface of the volute casing 2 and side liner 3, on either side of the join, to provide the seal against the pumping medium travelling II through an interface between the faces 14 and A further method of sealing is shown in figure 2 which utilises and ring seal 5. The mating faces 16 and 17 respectively, of the volute casing 2 and side liner 3 are machined to provide a smooth sealing surface. A chamfered recess 18 is formed on the outer corner of the volute casing 2 or the side liner 3 into which is compressed the ring 0158p:SC -3- 3
J
o abO o a 0 0 oo 00 0 S000 00 0 0 o a 0 0t e e 0 0 00 0 000 0 00 0 1 0 00 o a 0 a (B (r1 o 0 O 0 006 a.
0 04 0S red o o 0
W
0 e a a 00 a 0 0 a 0 0 In the sealing position the volute casing 2 and side liner 3 are locked together with the faces 16 and 17 in intimate contact. The ring 5 is compresseJ in the recess 18 by the frame plate 1 and the surface 17 of the side liner 3 to form a seal against any pumping medium which travels through the interface of the faces 16 and 17.
A further prior method is shown in figure 3 utilising a ring seal. In this method, the faces 19 and 20 are machined and the ring 6 inserts there between. When the volute casing 2 and the side liner 3 are tightened together with the frame plate 2 the ring 6 is compressed to provide a leak-free seal. It is essential that the surfaces 19 and are accurately machined to ensure proper compression of the rubber to effect a leak-free seal.
The present invention seeks to ameliorate the necessity from machining as is required in the prior art method.
In one broad form the present invention provides an elastomeric casing seal which provides relative positioning between first and second casing parts; where said first casing part has a member having a wall or walls projecting therefrom and said second casing part having a bore having a wall or walls extending from the opening of said bore, said walls terminating in a shoulder extending ratially inward with respect to said bore; wherein the walls of said first casing part fit within the bore of said second casing part; t. "~ZtSI: .r c.
0158p:SC -4wherein said seal is substantially L-shaped in cross-section with the long arm of the L having at least one of its surfaces which slopes from its free end which is narrower in width than the width of the base of the long arm, but mate with an adjacent tapered face of one of the walls of said first and second casing parts and having the surface of the base of the L adapted to be located on the shoulder of said second casing part with the opposite surface of the base of the L facing the first casing part, having a recess to receive a Soo projection from the first casing part to locate the first o 0 0 casing part relative to the second casing part.
*y The present invention will now be described by way of 0 G o, example with reference to the accompanying drawings in which; 0°a D Figure 4 shows a schematic cross-section view of the t 0 centrifugal slurry pump containing one embodiment of the present invention; and S- Figure 5 shows a detailed sectional view of the seal a Z0 *"0Q0 shown in figure 4.
0 0 As shown in the figure, 4 a seal 8 of shaped °0 a cross-section is located in the recess on the volute casing 2 and locates the side liner 3 and seals between the side liner 3 00 Q :o and the volute casing 2, with frame plate 1 attached to the 0' o0 8 side liner 3 and the volute casing 2 to form the slurry pump casing in which the impeller 7 rotates.
A detailed view of the seal 8 is shown in figure 5. The face 10 of the side liner 3 is tapered. This taper mates with the taper on the inner face 21 of the leg 22 of the seal 8, thus radially locating the side liner 3 in relation to the volute casing 2, without providing a radially sealing joint.
i~ i il..
0158p:SC The elastomeric material of the seal 8 is compressed between the face 12 of the side liner 3 and the face 13 of the volute casing 2 in the axial direction to provide a liquid-tight joint. The let 11 of the of the seal 8 engage around the annular portion 23 of the side liner 3 to positively locate the seal 8 to prevent extrusion of the seal from the joint under pressure. The face 24 of the leg 11 is tapered to prevent erosion at the mating joint of the volute casing 2 and side liner 3.
'Whilst the seal has been shown in the above embodiment as S"J" shaped, it is possible to utilise an shaped seal or other suitable shapes to accompany the project of the present 0. invention. Further, the annular projection 23 could be located aa t a on the face 13 of the volute casing 2 with complementary recess located in the bottom of the of the seal.
Further, the inner face 21 could be non-tapered while the outer face 9 is tapered to provide correct radial location. A further annular projection could be located on the opposite j face of either the volute casing 2 or the side line 3 to a provide a double lock for the seal 8 which can be of any required shape.
Further, the present invention provides a joint which S requires no machining on the mating faces, yet provides a liquid-tight seal at less cost than the existing prior art seal.
(ii
Claims (4)
1. An elastomeric casing seal which provides relative positioning between first and second casing parts; where said first casing part has a member having a wall or walls projecting therefrom and said second casing part having a bore having a wall or walls extending from the opening of said bore, said walls terminating in a shoulder extending radially inward with respect to said bore; wherein the walls of said first casing part fit within the bore of said second casing part; ot wherein said seal is substantially L-shaped in 0o cross-section with the long arm of the L having at least one of 0 0 its surfaces which slopes from its free end which is narrower o oin width than the width of the base of the long arm, but mate 0 4 with an adjacent tapered face of one of the walls of said first and second casing parts and having the surface of the base of the L adapted to be located on the shoulder of said second casing part with the opposite surface of the base of the L o facing the first casing part, having a recess to receive a projection from the first casing part to locate the first casing part relative to the second casing part.
2. An elastomeric casing seal according to claim 1 wherein the seal is annular.
3. An elastomeric casing seal according to claims 1 and 2 wherein the sloping surface of the long arm of the L is its inner surface to mate with a tapered surface of the first casing AT,~ 0158p:SC 7
4. An elastomeric casing seal according to any one of the preceding claims wherein the portion of the seal which forms the free end of the base of the L, in use, slopes upwardly from the edge of the shoulder of the second casing part to abut against the first casing part. An elastomeric casing seal substantially as hereinbefore described with reference to figures 4 and 5 of the accompanying drawings. t t DATED this 12th day of February, 1991. 4; i WARMAN INTERNATIONAL LIMITED By Its Patent Attorneys ARTHUR S. CAVE CO. I; p t p p 4 1 44B ~r i 1 i--
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU25765/88A AU610287B2 (en) | 1987-11-24 | 1988-11-21 | Elastomeric pump casing seal |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPI560187 | 1987-11-24 | ||
| AUPI5601 | 1987-11-24 | ||
| AU25765/88A AU610287B2 (en) | 1987-11-24 | 1988-11-21 | Elastomeric pump casing seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2576588A AU2576588A (en) | 1989-05-25 |
| AU610287B2 true AU610287B2 (en) | 1991-05-16 |
Family
ID=25619747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU25765/88A Ceased AU610287B2 (en) | 1987-11-24 | 1988-11-21 | Elastomeric pump casing seal |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU610287B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995805A (en) * | 1962-08-24 | 1965-06-23 | Hamilton Kent Mfg Co | Annular gasket |
| GB1436310A (en) * | 1972-08-11 | 1976-05-19 | British Steel Corp | Pipe joints and sealing members therefor |
| GB1523880A (en) * | 1974-12-09 | 1978-09-06 | Polymers Marketing Ltd Const | Seal |
-
1988
- 1988-11-21 AU AU25765/88A patent/AU610287B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB995805A (en) * | 1962-08-24 | 1965-06-23 | Hamilton Kent Mfg Co | Annular gasket |
| GB1436310A (en) * | 1972-08-11 | 1976-05-19 | British Steel Corp | Pipe joints and sealing members therefor |
| GB1523880A (en) * | 1974-12-09 | 1978-09-06 | Polymers Marketing Ltd Const | Seal |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2576588A (en) | 1989-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| HB | Alteration of name in register |
Owner name: WEIR WARMAN LTD Free format text: FORMER NAME WAS: WARMAN INTERNATIONAL LTD. |