DE502004012468D1 - Dry positive displacement vacuum pump with internal compression - Google Patents

Dry positive displacement vacuum pump with internal compression

Info

Publication number
DE502004012468D1
DE502004012468D1 DE502004012468T DE502004012468T DE502004012468D1 DE 502004012468 D1 DE502004012468 D1 DE 502004012468D1 DE 502004012468 T DE502004012468 T DE 502004012468T DE 502004012468 T DE502004012468 T DE 502004012468T DE 502004012468 D1 DE502004012468 D1 DE 502004012468D1
Authority
DE
Germany
Prior art keywords
vacuum pump
pump
positive displacement
internal compression
displacement vacuum
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 - Lifetime
Application number
DE502004012468T
Other languages
German (de)
Inventor
Johannes Dr Eickhoff
Heiner Dr Koesters
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.)
Sterling Industry Consult GmbH
Original Assignee
Sterling Industry Consult GmbH
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 Sterling Industry Consult GmbH filed Critical Sterling Industry Consult GmbH
Publication of DE502004012468D1 publication Critical patent/DE502004012468D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04C2220/10—Vacuum
    • F04C2220/12—Dry running

Abstract

The dry vacuum pump has several successive chambers closed off leaving leakage openings where the cross-sectional area of the opening is greater on at least one chamber on the suction side than on the chamber on the pressure side. The pump can be a screw spindle pump with the chambers formed on the same spindles. The pump is set up for a lower speed with an average and higher suction-side pressure than with a low suction-side pressure.
DE502004012468T 2004-03-05 2004-03-05 Dry positive displacement vacuum pump with internal compression Expired - Lifetime DE502004012468D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04005342A EP1571340B1 (en) 2004-03-05 2004-03-05 Dry running positive displacement vacuum pump with internal compression

Publications (1)

Publication Number Publication Date
DE502004012468D1 true DE502004012468D1 (en) 2011-06-16

Family

ID=34746023

Family Applications (1)

Application Number Title Priority Date Filing Date
DE502004012468T Expired - Lifetime DE502004012468D1 (en) 2004-03-05 2004-03-05 Dry positive displacement vacuum pump with internal compression

Country Status (3)

Country Link
EP (1) EP1571340B1 (en)
AT (1) ATE508280T1 (en)
DE (1) DE502004012468D1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2619468B2 (en) * 1988-04-06 1997-06-11 株式会社日立製作所 Oil-free screw fluid machine
KR100190310B1 (en) * 1992-09-03 1999-06-01 모리시따 요오이찌 Two stage primary dry pump
GB9930556D0 (en) * 1999-12-23 2000-02-16 Boc Group Plc Improvements in vacuum pumps
US20030126733A1 (en) * 2002-01-07 2003-07-10 Bush James W. Method to rough size coated components for easy assembly

Also Published As

Publication number Publication date
EP1571340B1 (en) 2011-05-04
EP1571340A1 (en) 2005-09-07
ATE508280T1 (en) 2011-05-15

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