GB885954A - Improvements in or relating to molecular pumps - Google Patents
Improvements in or relating to molecular pumpsInfo
- Publication number
- GB885954A GB885954A GB8192/60A GB819260A GB885954A GB 885954 A GB885954 A GB 885954A GB 8192/60 A GB8192/60 A GB 8192/60A GB 819260 A GB819260 A GB 819260A GB 885954 A GB885954 A GB 885954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shell
- oil
- chambers
- pump
- bearing support
- 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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/042—Turbomolecular vacuum pumps
-
- 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
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Abstract
885,954. Axial flow pumps. PFEIFFER G.m.b.H., ARTHUR. March 8, 1960, No. 8192/60. Class 110 (1). [Also in Group XXXIV] In a molecular pump, having pressure chambers under a preliminary vacuum and bounded by a pump casing and by bearing support plates, a housing mounted on the inner side of each bearing support plate encloses a bearing opening in the plate, surrounds the rotor shaft with a slight clearance, and is provided with cooling chambers and a return pipe for oil passing out of the bearing. An inlet 4 is provided in the pump casing 1 and outlets 5 communicate with a backing pump. The molecular pump shown comprises discs 9, which are mounted on the shaft 6, and have diagonal peripheral slots which co-operate with diagonal slots in stationary rings 10 secured to the pump casing. A housing 17 attached to bearing support plates 2, 3 comprises a shell 18 surrounded by a second shell 29, the space therebetween forming the cooling chamber 31. A radially projecting wall 25 inside the shell 18 forms chambers 27, 28 interconnected at their lowest point. Oil is supplied to the bearings through a pipe 37, accumulates in the chamber 28 and is drawn off through a pipe 38. The shaft 6, being stepped, prevents the flow of oil into the pressure chamber. As the shell 18 is cooled any oil vapour in the chambers 27, 28 will condense therein and be discharged. Oil vapour which enters the pressure chamber 12 will condense on the housings 17 and dripping off the housing walls passes into the sockets 5. Specification 811,858 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8192/60A GB885954A (en) | 1960-03-08 | 1960-03-08 | Improvements in or relating to molecular pumps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8192/60A GB885954A (en) | 1960-03-08 | 1960-03-08 | Improvements in or relating to molecular pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB885954A true GB885954A (en) | 1962-01-03 |
Family
ID=9847621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8192/60A Expired GB885954A (en) | 1960-03-08 | 1960-03-08 | Improvements in or relating to molecular pumps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB885954A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3644051A (en) * | 1969-10-27 | 1972-02-22 | Sargent Welch Scientific Co | Turbomolecular and stator pump having improved rotor construction |
DE2309665A1 (en) * | 1973-02-27 | 1974-09-05 | Leybold Heraeus Gmbh & Co Kg | TURBOMOLECULAR VACUUM PUMP |
EP0147015A2 (en) * | 1983-10-07 | 1985-07-03 | Sargent-Welch Scientific Company | Turbomolecular pump and bearing assembly therefor |
US4674952A (en) * | 1983-10-07 | 1987-06-23 | Sargent-Welch Scientific Company | Turbo molecular pump with improved bearing assembly |
US4767265A (en) * | 1983-10-07 | 1988-08-30 | Sargent-Welch Scientific Co. | Turbomolecular pump with improved bearing assembly |
US4806075A (en) * | 1983-10-07 | 1989-02-21 | Sargent-Welch Scientific Co. | Turbomolecular pump with improved bearing assembly |
GB2498816A (en) * | 2012-01-27 | 2013-07-31 | Edwards Ltd | Vacuum pump |
GB2498768B (en) * | 2012-01-27 | 2016-07-27 | Edwards Ltd | Gas transfer vacuum pump |
-
1960
- 1960-03-08 GB GB8192/60A patent/GB885954A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3644051A (en) * | 1969-10-27 | 1972-02-22 | Sargent Welch Scientific Co | Turbomolecular and stator pump having improved rotor construction |
DE2309665A1 (en) * | 1973-02-27 | 1974-09-05 | Leybold Heraeus Gmbh & Co Kg | TURBOMOLECULAR VACUUM PUMP |
EP0147015A2 (en) * | 1983-10-07 | 1985-07-03 | Sargent-Welch Scientific Company | Turbomolecular pump and bearing assembly therefor |
EP0147015A3 (en) * | 1983-10-07 | 1986-03-19 | Sargent-Welch Scientific Company | Turbomolecular pump and bearing assembly therefor |
US4674952A (en) * | 1983-10-07 | 1987-06-23 | Sargent-Welch Scientific Company | Turbo molecular pump with improved bearing assembly |
US4767265A (en) * | 1983-10-07 | 1988-08-30 | Sargent-Welch Scientific Co. | Turbomolecular pump with improved bearing assembly |
US4806075A (en) * | 1983-10-07 | 1989-02-21 | Sargent-Welch Scientific Co. | Turbomolecular pump with improved bearing assembly |
GB2498816A (en) * | 2012-01-27 | 2013-07-31 | Edwards Ltd | Vacuum pump |
GB2498768B (en) * | 2012-01-27 | 2016-07-27 | Edwards Ltd | Gas transfer vacuum pump |
US10337517B2 (en) | 2012-01-27 | 2019-07-02 | Edwards Limited | Gas transfer vacuum pump |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3832084A (en) | Pivot for rotating molecular pumps | |
US3094272A (en) | Motor-compressor apparatus | |
GB1473374A (en) | Turbomolecular vacuum pump | |
GB1127310A (en) | Centrifugal pump having thrust balancing means | |
GB1240171A (en) | Improvements in or relating to pumps and agitators | |
US3128713A (en) | Hydraulic pump | |
GB1318884A (en) | Rotary compressors | |
GB885954A (en) | Improvements in or relating to molecular pumps | |
US2407987A (en) | Multistage centrifugal pump | |
US3054554A (en) | Turbo-blower | |
US3909154A (en) | Centrifugal compressor | |
GB1466723A (en) | Hydrodynamic retarder | |
US3531223A (en) | Turbo-feed pump assembly | |
RU2099567C1 (en) | Device for axial unloading of rotor of turbine pump unit | |
ES363554A1 (en) | Improvements in and relating to sealing devices | |
GB701511A (en) | Improvements in and relating to pump and motor combinations | |
GB773827A (en) | Improvements in motor driven pumps | |
SE7703268L (en) | SLIDING GASKET FOR AN AXLE IN A ROTATION MACHINE, SPECIAL CENTRIFUGAL PUMP | |
US2902943A (en) | Rotary low pressure gas pump and method of operating the same | |
GB1381904A (en) | Multi-stage two section centrifugal compressor | |
GB805824A (en) | Combined fluid pressure bearing and seal for apparatus utilizing a fluid | |
US3175506A (en) | Rotating vane type pump | |
US3738769A (en) | Housing for centrifugal pumps | |
GB799789A (en) | Improvements in or relating to lubrication of pumps | |
GB893938A (en) | Improvements in or relating to rotary engines |