FR2582741A1 - Pompe mecanique a plusieurs etages comportant des conduits centraux pour empecher les fuites de gaz - Google Patents

Pompe mecanique a plusieurs etages comportant des conduits centraux pour empecher les fuites de gaz Download PDF

Info

Publication number
FR2582741A1
FR2582741A1 FR8607733A FR8607733A FR2582741A1 FR 2582741 A1 FR2582741 A1 FR 2582741A1 FR 8607733 A FR8607733 A FR 8607733A FR 8607733 A FR8607733 A FR 8607733A FR 2582741 A1 FR2582741 A1 FR 2582741A1
Authority
FR
France
Prior art keywords
chamber
pump
gas
mechanical pump
pumping
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.)
Pending
Application number
FR8607733A
Other languages
English (en)
French (fr)
Inventor
Henryk Wycliffe
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 FR2582741A1 publication Critical patent/FR2582741A1/fr
Pending 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F04C29/0028—Internal leakage control
    • 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
    • F04C23/001—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 of similar working principle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
FR8607733A 1985-05-30 1986-05-29 Pompe mecanique a plusieurs etages comportant des conduits centraux pour empecher les fuites de gaz Pending FR2582741A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858513684A GB8513684D0 (en) 1985-05-30 1985-05-30 Mechanical pumps

Publications (1)

Publication Number Publication Date
FR2582741A1 true FR2582741A1 (fr) 1986-12-05

Family

ID=10579927

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8607733A Pending FR2582741A1 (fr) 1985-05-30 1986-05-29 Pompe mecanique a plusieurs etages comportant des conduits centraux pour empecher les fuites de gaz

Country Status (5)

Country Link
JP (1) JPS6217389A (de)
DE (1) DE3617889A1 (de)
FR (1) FR2582741A1 (de)
GB (2) GB8513684D0 (de)
IT (1) IT1188739B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153592A (ja) * 1985-12-26 1987-07-08 Ulvac Corp ２段ガスバラストポンプの減圧軸封装置
JPS63239389A (ja) * 1987-03-25 1988-10-05 Anretsuto:Kk 半割り型ケ−シング使用の多段式ル−ツロ−タの軸シ−ル
NL9001875A (nl) * 1990-07-17 1992-02-17 Bombas Stork S A Lobbenrotorpomp.
JP2533605Y2 (ja) * 1991-03-29 1997-04-23 株式会社島津製作所 位相差ポンプ
DE19756838C1 (de) * 1997-12-19 1999-04-15 K Busch Gmbh Druck & Vakuum Dr Drehkolbenpumpe
JP2002221177A (ja) * 2001-01-24 2002-08-09 Toyota Industries Corp 真空ポンプにおける軸封構造
JP2008008302A (ja) * 2001-09-06 2008-01-17 Ulvac Japan Ltd 多段式容積移送型ドライ真空ポンプの省エネ方法
JP2004278381A (ja) * 2003-03-14 2004-10-07 Toyota Industries Corp ギヤポンプ
GB0515905D0 (en) 2005-08-02 2005-09-07 Boc Group Plc Vacuum pump
DE202011104491U1 (de) 2011-08-17 2012-11-20 Oerlikon Leybold Vacuum Gmbh Wälzkolbenpumpe
FR3094762B1 (fr) * 2019-04-05 2021-04-09 Pfeiffer Vacuum Pompe à vide de type sèche et installation de pompage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE415913C (de) * 1922-04-01 1925-07-10 Siemens Schuckertwerke G M B H Einrichtung an Drehkolbenpumpen fuer gasfoermige Koerper zur Verminderung der Undichtigkeitsverluste durch Umstroemen
GB596064A (en) * 1945-07-17 1947-12-24 Stothert & Pitt Ltd Improvements in or relating to rotary pumps
US3265292A (en) * 1965-01-13 1966-08-09 Svenska Rotor Maskiner Ab Screw rotor machine
US4329126A (en) * 1977-11-11 1982-05-11 Kobe Steel Limited Method for preventing a leakage loss of gases in a screw compressor
GB2088957A (en) * 1980-12-05 1982-06-16 Boc Ltd Rotary positive-displacement Fluid-machines
GB2111126A (en) * 1981-12-09 1983-06-29 British Oxygen Co Ltd Rotary positive-displacement fluid-machines
EP0126477A1 (de) * 1983-05-20 1984-11-28 NIPPON PISTON RING CO., Ltd. Vorrichtung für das Wellenlager eines Kompressorrotors mit beweglichen Flügeln

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB790799A (en) * 1955-08-15 1958-02-19 Edwards High Vacuum Ltd Improvements in or relating to multi-stage rotary vacuum pumps
US3976405A (en) * 1974-10-29 1976-08-24 Cominco Ltd. Pump
JPS5163506U (de) * 1974-11-15 1976-05-19
GB1570512A (en) * 1976-09-04 1980-07-02 Howden Compressors Ltd Meshing-screw gas-compressing apparatus
DE2754612A1 (de) * 1977-12-08 1979-06-13 Allweiler Ag Schraubenspindelpumpe
US4199304A (en) * 1978-03-13 1980-04-22 Ford Motor Company Positive displacement compact slipper pump
JPS55104588A (en) * 1979-02-02 1980-08-11 Shin Meiwa Ind Co Ltd Underwater blower
DE3047699A1 (de) * 1980-12-18 1982-07-01 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Waelzkolbenpumpe mit druckausgleichskammer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE415913C (de) * 1922-04-01 1925-07-10 Siemens Schuckertwerke G M B H Einrichtung an Drehkolbenpumpen fuer gasfoermige Koerper zur Verminderung der Undichtigkeitsverluste durch Umstroemen
GB596064A (en) * 1945-07-17 1947-12-24 Stothert & Pitt Ltd Improvements in or relating to rotary pumps
US3265292A (en) * 1965-01-13 1966-08-09 Svenska Rotor Maskiner Ab Screw rotor machine
US4329126A (en) * 1977-11-11 1982-05-11 Kobe Steel Limited Method for preventing a leakage loss of gases in a screw compressor
GB2088957A (en) * 1980-12-05 1982-06-16 Boc Ltd Rotary positive-displacement Fluid-machines
GB2111126A (en) * 1981-12-09 1983-06-29 British Oxygen Co Ltd Rotary positive-displacement fluid-machines
EP0126477A1 (de) * 1983-05-20 1984-11-28 NIPPON PISTON RING CO., Ltd. Vorrichtung für das Wellenlager eines Kompressorrotors mit beweglichen Flügeln

Also Published As

Publication number Publication date
JPH0368237B2 (de) 1991-10-25
IT1188739B (it) 1988-01-28
GB8611363D0 (en) 1986-06-18
IT8620580A0 (it) 1986-05-27
JPS6217389A (ja) 1987-01-26
DE3617889A1 (de) 1986-12-04
DE3617889C2 (de) 1991-03-14
GB2175956A (en) 1986-12-10
IT8620580A1 (it) 1987-11-27
GB8513684D0 (en) 1985-07-03

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