DE69021370D1 - Zweistufiges Pumpsystem. - Google Patents

Zweistufiges Pumpsystem.

Info

Publication number
DE69021370D1
DE69021370D1 DE69021370T DE69021370T DE69021370D1 DE 69021370 D1 DE69021370 D1 DE 69021370D1 DE 69021370 T DE69021370 T DE 69021370T DE 69021370 T DE69021370 T DE 69021370T DE 69021370 D1 DE69021370 D1 DE 69021370D1
Authority
DE
Germany
Prior art keywords
pump system
stage pump
stage
pump
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 - Fee Related
Application number
DE69021370T
Other languages
English (en)
Other versions
DE69021370T2 (de
Inventor
Michael J Pastore
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.)
Gardner Denver Nash LLC
Original Assignee
Nash Engineering Co
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 Nash Engineering Co filed Critical Nash Engineering Co
Application granted granted Critical
Publication of DE69021370D1 publication Critical patent/DE69021370D1/de
Publication of DE69021370T2 publication Critical patent/DE69021370T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
DE69021370T 1990-03-22 1990-12-14 Zweistufiges Pumpsystem. Expired - Fee Related DE69021370T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/497,326 US5131817A (en) 1990-03-22 1990-03-22 Two-stage pumping system

Publications (2)

Publication Number Publication Date
DE69021370D1 true DE69021370D1 (de) 1995-09-07
DE69021370T2 DE69021370T2 (de) 1996-01-25

Family

ID=23976408

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021370T Expired - Fee Related DE69021370T2 (de) 1990-03-22 1990-12-14 Zweistufiges Pumpsystem.

Country Status (4)

Country Link
US (1) US5131817A (de)
EP (1) EP0447716B1 (de)
CA (1) CA2034039C (de)
DE (1) DE69021370T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58901145D1 (de) * 1988-06-24 1992-05-21 Siemens Ag Mehrstufiges vakuumpumpenaggregat.
US5273412A (en) * 1991-03-28 1993-12-28 Grasso's Koninklijke Machinefabrieken N.V. Lubricated rotary compressor having a cooling medium inlet to the delivery port
IT1289796B1 (it) * 1996-12-23 1998-10-16 Elasis Sistema Ricerca Fiat Perfezionamenti ad un dispositivo a pompa per l'alimentazione del carburante da un serbatoio ad un motore a combustione interna.
US5899668A (en) * 1997-01-30 1999-05-04 The Nash Engineering Company Two-stage liquid ring pumps having separate gas and liquid inlets to the second stage
JP2000283024A (ja) * 1999-03-30 2000-10-10 Aisin Seiki Co Ltd ポンプ装置
US20110194950A1 (en) * 2010-02-10 2011-08-11 Shenoi Ramesh B Efficiency improvements for liquid ring pumps
CN104632630B (zh) * 2013-11-13 2017-01-11 中国科学院沈阳科学仪器股份有限公司 一种罗茨干泵热膨胀的控制***及方法
US11815095B2 (en) * 2019-01-10 2023-11-14 Elival Co., Ltd Power saving vacuuming pump system based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps
US20230096279A1 (en) * 2021-09-27 2023-03-30 Raymond Zhou Shaw Vacuum system having condenser and root vacuum pump set
US20230167822A1 (en) * 2021-09-27 2023-06-01 Raymond Zhou Shaw Vacuum system having condenser and root vacuum pump set
CN114837950B (zh) * 2022-05-27 2024-06-21 山东省章丘鼓风机股份有限公司 罗茨真空泵的逆流口面积计算及位置确定的方法

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US117626A (en) * 1871-08-01 Improvement in supplying water to air-pumps
US1097783A (en) * 1911-01-28 1914-05-26 Burgess Sulphite Fibre Co Process of blowing acid gases.
US1155335A (en) * 1912-12-30 1915-10-05 Augustus Lea Bricknell Internal-combustion engine.
US1340165A (en) * 1919-05-26 1920-05-18 Worthington Pump & Mach Corp Condenser system and vacuum-pump
US1491993A (en) * 1919-11-01 1924-04-29 Delco Light Co Rotary pressure or vacuum pump
US2404660A (en) * 1943-08-26 1946-07-23 Wilfred J Rouleau Air compressor
US2489887A (en) * 1946-07-11 1949-11-29 Roots Connersville Blower Corp Rotary pump
FR1129872A (fr) * 1954-08-21 1957-01-28 Heraeus Gmbh W C Pompe mécanique à vide poussé du type roots
US2971691A (en) * 1955-08-16 1961-02-14 Heraeus Gmbh W C Pumping system
GB810166A (en) * 1957-01-30 1959-03-11 Hathaway Ltd L Improvements in and relating to priming systems for centrifugal pumps
SE317154B (de) * 1959-01-15 1969-11-10 Svenska Rotor Maskiner Ab
US3105630A (en) * 1960-06-02 1963-10-01 Atlas Copco Ab Compressor units
US3109297A (en) * 1961-09-20 1963-11-05 Gen Electric Rotary compressor injection cooling arrangement
DE1428248A1 (de) * 1962-12-01 1969-02-13 Svenska Rotor Maskiner Ab Drehkolben-Kompressormaschine
US3289591A (en) * 1963-02-12 1966-12-06 Eriksson Sven Gustaf Device for sucking liquid, air and solid particles
SE310751B (de) * 1963-12-23 1969-05-12 Svenska Rotor Maskiner Ab
US3231179A (en) * 1964-06-02 1966-01-25 Technical Ind Inc Lobular type of pump
GB1172993A (en) * 1966-02-23 1969-12-03 Plessey Co Ltd Improvements in or relating to Rotary-Positive Displacement Machines
US3575539A (en) * 1968-11-27 1971-04-20 United States Steel Corp Apparatus for suppressing vibration in a helical-rotor axial-flow compressor supplied with sealing water
US3642384A (en) * 1969-11-19 1972-02-15 Henry Huse Multistage vacuum pumping system
FR2097285A5 (de) * 1970-07-01 1972-03-03 Joy Mfg Co
US3910731A (en) * 1970-07-09 1975-10-07 Svenska Rotor Maskiner Ab Screw rotor machine with multiple working spaces interconnected via communication channel in common end plate
US3922110A (en) * 1974-01-28 1975-11-25 Henry Huse Multi-stage vacuum pump
US3956072A (en) * 1975-08-21 1976-05-11 Atlantic Fluidics, Inc. Vapor distillation apparatus with two disparate compressors
US4123203A (en) * 1977-10-14 1978-10-31 Gardner-Denver Company Multistage helical screw compressor with liquid injection
DE3209035A1 (de) * 1981-03-13 1982-09-30 Sullair Technology AB, 11653 Stockholm Verfahren und vorrichtung zur zwischenkuehlung in einem oeleingespritzten mehrstufen-schraubenkompressor
JPS58183888A (ja) * 1982-04-21 1983-10-27 Hitachi Ltd 油冷式スクリユ−圧縮機の給油装置
US4812110A (en) * 1986-08-11 1989-03-14 Kabushiki Kaisha Kobe Seiko Sho Oil-free screw compressor with bypass of cooled discharged gas
JPH0733834B2 (ja) * 1986-12-18 1995-04-12 株式会社宇野澤組鐵工所 ロータ内蔵ハウジングの外周温度が安定化された内部分流逆流冷却多段式の三葉式真空ポンプ

Also Published As

Publication number Publication date
DE69021370T2 (de) 1996-01-25
US5131817A (en) 1992-07-21
CA2034039C (en) 2000-10-24
EP0447716B1 (de) 1995-08-02
CA2034039A1 (en) 1991-09-23
EP0447716A1 (de) 1991-09-25

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: NASH_ELMO INDUSTRIES,L.L.C.(N.D.GES.D.STAATES DELA

8339 Ceased/non-payment of the annual fee