GB1241955A - Improvements in or relating to seals - Google Patents
Improvements in or relating to sealsInfo
- Publication number
- GB1241955A GB1241955A GB4541467A GB4541467A GB1241955A GB 1241955 A GB1241955 A GB 1241955A GB 4541467 A GB4541467 A GB 4541467A GB 4541467 A GB4541467 A GB 4541467A GB 1241955 A GB1241955 A GB 1241955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- liquid
- shoulder
- insert
- diaphragm
- 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.)
- Expired
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
- F04D29/10—Shaft sealings
- F04D29/14—Shaft sealings operative only when pump is inoperative
- F04D29/146—Shaft sealings operative only when pump is inoperative especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
1,241,955. Shaft seals. SPEEDWELL RESEARCH Ltd. 19 Dec., 1968 [5 Oct., 1967], No. 45414/67. Heading F2B. An annular diaphragm which may be used in a centrifugal pump described in Specification 1,185,312 comprises a one-piece main body having radially-spaced outer and inner portions 11, 12 interconnected by a relatively thinner web 13, an insert 15 being provided in one of the outer or inner portions of material having a greater resilience than that of the main body. The main body may be made of metal (e.g. titanium or stainless steel), sintered or hard P.T.F.E., glass-loaded P.T.F.E., a fluorocarbon resin, a phenolic asbestos resin or a polyimide and the insert 15 may be made of compressed asbestos fibre or rubber. The web 13 may be corrugated and formed by a spiral or by concentric rings, the cross-section of the corrugations being V-shape, sinusoidal arcuate or square. As shown, the outer portion 11 is provided with the insert and clamped between two parts of the pump casing, while the inner portion 12 may be provided with either a wearresistant insert 12a, Fig. 1A, or a wear-resistant coating for making static sealing contact under the influence of liquid pressure against a shoulder 40 on the shaft when the pump is both stationary and filled with liquid. When the pump is stationary and empty, the diaphragm assumes the position shown clear of the shoulder 40. The seal chamber 50 is divided into two compartments 56, 57 by an annular partition 51 clamped at its periphery 52. A subsidiary impeller 46 having blades 69, 70 rotates within the compartment 56 of the seal chamber. When the pump is running and full of liquid, the subsidiary impeller 46 pumps liquid out of the compartment 57 of the seal chamber so that the diaphragm is again freed from the shoulder 40 and an annulus of liquid is formed between the blades 69 and the partition 51. If desired, the diaphragm may be urged by a spring into a static sealing position on the shoulder 40, the spring pressure being reduced when the pump is running as described above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4541467A GB1241955A (en) | 1967-10-05 | 1967-10-05 | Improvements in or relating to seals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4541467A GB1241955A (en) | 1967-10-05 | 1967-10-05 | Improvements in or relating to seals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1241955A true GB1241955A (en) | 1971-08-11 |
Family
ID=10437126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4541467A Expired GB1241955A (en) | 1967-10-05 | 1967-10-05 | Improvements in or relating to seals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1241955A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122280A (en) * | 1982-06-22 | 1984-01-11 | Outokumpu Oy | Sealing of a shaft in a centrifugal pump and a method for effecting the sealing |
EP0355980A1 (en) * | 1988-08-15 | 1990-02-28 | A.R. WILFLEY & SONS, INC. | Pump sealing apparatus |
EP0386315A1 (en) * | 1989-03-07 | 1990-09-12 | Feodor Burgmann Dichtungswerke GmbH & Co. | Sealing device and pump provided therewith |
-
1967
- 1967-10-05 GB GB4541467A patent/GB1241955A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122280A (en) * | 1982-06-22 | 1984-01-11 | Outokumpu Oy | Sealing of a shaft in a centrifugal pump and a method for effecting the sealing |
EP0355980A1 (en) * | 1988-08-15 | 1990-02-28 | A.R. WILFLEY & SONS, INC. | Pump sealing apparatus |
EP0386315A1 (en) * | 1989-03-07 | 1990-09-12 | Feodor Burgmann Dichtungswerke GmbH & Co. | Sealing device and pump provided therewith |
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