GB424988A - Improvements in rotary vacuum pumps - Google Patents

Improvements in rotary vacuum pumps

Info

Publication number
GB424988A
GB424988A GB3421133A GB3421133A GB424988A GB 424988 A GB424988 A GB 424988A GB 3421133 A GB3421133 A GB 3421133A GB 3421133 A GB3421133 A GB 3421133A GB 424988 A GB424988 A GB 424988A
Authority
GB
United Kingdom
Prior art keywords
pump
oil
stages
spindle
flat
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
Application number
GB3421133A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3421133A priority Critical patent/GB424988A/en
Publication of GB424988A publication Critical patent/GB424988A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/02—Liquid sealing for high-vacuum pumps or for compressors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Abstract

424,988. Rotary pumps. BANCROFT, F. E., 19, Delaine Road, Withington, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Dec. 5, 1933, No. 34211. [Class 110 (ii)] A rotary vacuum pump comprises a rotor in two portions 8, 9, and a driving gear 10, mounted in bearings 11, 12. Each rotor contains a pair of radial vanes separated by springs, the pairs preferably being at right angles to one another. The two rotors may form first and second stages of a pump, the whole being sealed and lubricated by oil in an outer casing 7. A driving spindle 19 is provided with an oil groove 23 for sealing against admission of outside air. An oil inlet valve 26 to the intermediate chamber 21, which lies between the pump stages, contains a threaded spindle 35 having a flat 36 along which oil passes from a strainer 38, to a duct 33 leading to the chamber 21. A slot 37 permits radial expansion of the screw thread. When the pump is stopped, the oil level falls below the flat 36, and air flows in from a vent 39. The two pump stages may be in parallel. Side thrust on the spindle 19, due to pressure differences on its ends, is balanced by means of helical threads on the gears 10, 18.
GB3421133A 1933-12-05 1933-12-05 Improvements in rotary vacuum pumps Expired GB424988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3421133A GB424988A (en) 1933-12-05 1933-12-05 Improvements in rotary vacuum pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3421133A GB424988A (en) 1933-12-05 1933-12-05 Improvements in rotary vacuum pumps

Publications (1)

Publication Number Publication Date
GB424988A true GB424988A (en) 1935-03-05

Family

ID=10362781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3421133A Expired GB424988A (en) 1933-12-05 1933-12-05 Improvements in rotary vacuum pumps

Country Status (1)

Country Link
GB (1) GB424988A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104110B (en) * 1958-05-21 1961-04-06 Heraeus Gmbh W C Multi-stage rotary lobe vacuum pump sealed with OEl
DE1293385B (en) * 1955-11-10 1969-04-24 Central Scient Co Two-stage oil-sealed vacuum pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293385B (en) * 1955-11-10 1969-04-24 Central Scient Co Two-stage oil-sealed vacuum pump
DE1104110B (en) * 1958-05-21 1961-04-06 Heraeus Gmbh W C Multi-stage rotary lobe vacuum pump sealed with OEl

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