GB1075340A - Rotary vacuum pumps - Google Patents

Rotary vacuum pumps

Info

Publication number
GB1075340A
GB1075340A GB52713/64A GB5271364A GB1075340A GB 1075340 A GB1075340 A GB 1075340A GB 52713/64 A GB52713/64 A GB 52713/64A GB 5271364 A GB5271364 A GB 5271364A GB 1075340 A GB1075340 A GB 1075340A
Authority
GB
United Kingdom
Prior art keywords
stage
plate
oil
rotor
attached
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
GB52713/64A
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.)
Cenco Instruments Corp
Original Assignee
Cenco Instruments Corp
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 Cenco Instruments Corp filed Critical Cenco Instruments Corp
Publication of GB1075340A publication Critical patent/GB1075340A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F04C2220/00—Application
    • F04C2220/50—Pumps with means for introducing gas under pressure for ballasting

Landscapes

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

Abstract

1,075,340. Rotary vacuum-pumps. CENCO INSTRUMENTS CORPORATION. Dec. 29, 1964 [July 22, 1964], No. 52713/64. Heading F1F. [Also in Division F2] A rotary vacuum-pump of the outwardly-sliding radial-vane type comprises a low-pressure stage 22 and a high-pressure stage 24 with a plate 24 therebetween, the two stages being sealed by oil situated in a space 32 externally thereof. The stage 24 includes an intake port (49), Fig. 7 (not shown), which is connected to a cylindrical chamber (48) containing a pumping rotor (50) by a hollow block (47), and an exhaust port (72) connected to an intake port (95), Figs. 1 and 8 (not shown), for a cylindrical chamber (90) containing a pumping rotor (93) in the stage 24 by an opening (88) in the plate 26, an exhaust port (94) for the chamber (90) being controlled by a non-return valve (96), Fig. 4 (not shown), (see Division F2). The rotors (50, 93) are attached to a common driving-shaft 33 and are made hollow so that oil for sealing and cooling purposes can pass therethrough, the oil being taken from the space 32 by the action of the rotors through a hole 116 in a hollow end-cap 112 attached to an end-plate 110 for the stage 24, a passage 120 in said endplate, a passage 104 in the plate 26 and a passage 126 in an end-plate 82 for the stage 22, which passage communicates with the interior of a hollow end-cap 122 attached to the plate 82. While oil passes through interior of the rotor (93) gas mixed therewith is ejected by centrifugal action and escapes into the opening (88) through a groove (130), Figs. 1 and 4, in the plate 26. Sealing of a pair of diametrally-opposed radialvanes 52, 53 in each rotor is effected by centrifugal displacement of the oil within the rotor, surplus oil on the exterior portions of the rotor and the vanes being entrained with the gases being pumped. Gases and oil entrained therewith that are discharged from the stage 24 through the port (94) enter the space 32 whence the gases escape through a cowl or bonnet attached to a portion 29 of an external housing for the stages. The stage 22 may be charged with ballasting gases e. g. air, at atmospheric pressure through a pipe 36. Pressure-relief valves 86, (86') are provided on the plates 82, 110 at the ends of passages 84, (84') communicating with the ports (72, 95), respectively. The vanes are biased outwardly in a radial direction by springs 68 mounted on pins 67 attached to a tongue or so called leg 65 on one of the vanes in each pair thereof, said pins being slidingly engaged by radial bores in a tongue on the other vane. The tongues 65 engage with slots 70 in the shaft 33. The pump may be modified to include additional stages operating in parallel with the stages 22, 24.
GB52713/64A 1964-07-22 1964-12-29 Rotary vacuum pumps Expired GB1075340A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US384298A US3237851A (en) 1964-07-22 1964-07-22 Mechanical vacuum pump

Publications (1)

Publication Number Publication Date
GB1075340A true GB1075340A (en) 1967-07-12

Family

ID=23516761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52713/64A Expired GB1075340A (en) 1964-07-22 1964-12-29 Rotary vacuum pumps

Country Status (2)

Country Link
US (1) US3237851A (en)
GB (1) GB1075340A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127489A (en) * 1982-09-28 1984-04-11 Plenty Ltd Rotary pump

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371857A (en) * 1965-10-24 1968-03-05 Prec Scient Company Multistage vacuum pump
US3386648A (en) * 1967-01-31 1968-06-04 Walter J. Van Rossem Rotary vane type pump
US3838950A (en) * 1970-06-18 1974-10-01 Cenco Inc Vacuum pump with lubricant metering groove
US4204815A (en) * 1977-12-06 1980-05-27 Gast Manufacturing Corporation Cartridge rotary vane pump
US4838772A (en) * 1977-12-06 1989-06-13 Gast Manufacturing Corporation Cartridge rotary vane pump
DE102018105142A1 (en) * 2018-03-06 2019-09-12 Schwäbische Hüttenwerke Automotive GmbH Sealing element vacuum pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901539A (en) * 1905-06-14 1908-10-20 John George Leyner Multiple-stage air-compressor.
US1616733A (en) * 1925-06-06 1927-02-08 Preston K Wood Air compressor
US1675686A (en) * 1926-07-20 1928-07-03 Barber Asphalt Co Compressor
US2877946A (en) * 1955-11-10 1959-03-17 Central Scientific Co Vacuum pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127489A (en) * 1982-09-28 1984-04-11 Plenty Ltd Rotary pump

Also Published As

Publication number Publication date
US3237851A (en) 1966-03-01

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