EP1130263A3 - Helical gear vacuum pump - Google Patents

Helical gear vacuum pump Download PDF

Info

Publication number
EP1130263A3
EP1130263A3 EP01301502A EP01301502A EP1130263A3 EP 1130263 A3 EP1130263 A3 EP 1130263A3 EP 01301502 A EP01301502 A EP 01301502A EP 01301502 A EP01301502 A EP 01301502A EP 1130263 A3 EP1130263 A3 EP 1130263A3
Authority
EP
European Patent Office
Prior art keywords
vacuum pump
helical gear
gear vacuum
rotors
machining
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.)
Withdrawn
Application number
EP01301502A
Other languages
German (de)
French (fr)
Other versions
EP1130263A2 (en
Inventor
Michael Henry North
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.)
BOC Group Ltd
Original Assignee
BOC Group 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 BOC Group Ltd filed Critical BOC Group Ltd
Publication of EP1130263A2 publication Critical patent/EP1130263A2/en
Publication of EP1130263A3 publication Critical patent/EP1130263A3/en
Withdrawn legal-status Critical Current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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

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

A vacuum pump includes a pump body 20 in which is mounted two externally threaded rotors 7,8. The thread profile of each rotor is tapered in a substantially radial direction to facilitate the machining and fitting of the rotors 7,8 with the required close tolerances.
EP01301502A 2000-02-23 2001-02-20 Helical gear vacuum pump Withdrawn EP1130263A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0004263 2000-02-23
GBGB0004263.0A GB0004263D0 (en) 2000-02-23 2000-02-23 Improvements in vacuum pumps

Publications (2)

Publication Number Publication Date
EP1130263A2 EP1130263A2 (en) 2001-09-05
EP1130263A3 true EP1130263A3 (en) 2002-07-24

Family

ID=9886243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01301502A Withdrawn EP1130263A3 (en) 2000-02-23 2001-02-20 Helical gear vacuum pump

Country Status (4)

Country Link
US (1) US20010041145A1 (en)
EP (1) EP1130263A3 (en)
JP (1) JP2001304156A (en)
GB (1) GB0004263D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008533361A (en) 2005-03-10 2008-08-21 ノーティス，アラン Sealed and tapered screw pump / screw pressure motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594691C (en) * 1933-01-04 1934-03-21 Aeg Screw compressor, consisting of right- and left-handed, mutually engaging screws coupled by cogwheels
GB419338A (en) * 1933-01-03 1934-11-09 British Thomson Houston Co Ltd Improvements in and relating to screw pumps or compressors
GB552562A (en) * 1941-09-01 1943-04-14 Stothert & Pitt Ltd Improvements to screw displacement pumps
DE29720541U1 (en) * 1997-11-19 1999-03-18 SIHI Industry Consult GmbH, 25524 Itzehoe Screw gas pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB419338A (en) * 1933-01-03 1934-11-09 British Thomson Houston Co Ltd Improvements in and relating to screw pumps or compressors
DE594691C (en) * 1933-01-04 1934-03-21 Aeg Screw compressor, consisting of right- and left-handed, mutually engaging screws coupled by cogwheels
GB552562A (en) * 1941-09-01 1943-04-14 Stothert & Pitt Ltd Improvements to screw displacement pumps
DE29720541U1 (en) * 1997-11-19 1999-03-18 SIHI Industry Consult GmbH, 25524 Itzehoe Screw gas pump

Also Published As

Publication number Publication date
US20010041145A1 (en) 2001-11-15
JP2001304156A (en) 2001-10-31
EP1130263A2 (en) 2001-09-05
GB0004263D0 (en) 2000-04-12

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