FR2253930A1 - Rotary compressor with screw rotors - improves efficiency by varying rotor tip clearance from inlet to outlet - Google Patents

Rotary compressor with screw rotors - improves efficiency by varying rotor tip clearance from inlet to outlet

Info

Publication number
FR2253930A1
FR2253930A1 FR7440297A FR7440297A FR2253930A1 FR 2253930 A1 FR2253930 A1 FR 2253930A1 FR 7440297 A FR7440297 A FR 7440297A FR 7440297 A FR7440297 A FR 7440297A FR 2253930 A1 FR2253930 A1 FR 2253930A1
Authority
FR
France
Prior art keywords
outlet
inlet
rotors
clearance
rotary compressor
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Withdrawn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
FR7440297A
Other languages
French (fr)
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.)
Mannesmann Demag AG
Original Assignee
Demag AG
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 Demag AG filed Critical Demag AG
Publication of FR2253930A1 publication Critical patent/FR2253930A1/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Withdrawn legal-status Critical Current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

Landscapes

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

Abstract

The male rotor (8) has lobes projecting beyond the pitch circle. The female rotor (9) has matching helical recesses extending inwards from the pitch circle. When the compressor is not running the clearance between the lobes is a maximum but as the rotors expand due to the heat of compression, the clearance diminishes and this reduction is a maximum at the delivery end of the rotors and may be insufficient to prevent contact. To mitigate this effect the rotors are so shaped that the clearance when cold varies from a minimum at the inlet end to a maximum at the outlet.
FR7440297A 1973-12-07 1974-12-09 Rotary compressor with screw rotors - improves efficiency by varying rotor tip clearance from inlet to outlet Withdrawn FR2253930A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732361068 DE2361068A1 (en) 1973-12-07 1973-12-07 ROTARY LISTON COMPRESSORS, IN PARTICULAR DRY OR FLOODED SCREW COMPRESSORS

Publications (1)

Publication Number Publication Date
FR2253930A1 true FR2253930A1 (en) 1975-07-04

Family

ID=5900202

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7440297A Withdrawn FR2253930A1 (en) 1973-12-07 1974-12-09 Rotary compressor with screw rotors - improves efficiency by varying rotor tip clearance from inlet to outlet

Country Status (3)

Country Link
BE (1) BE823067A (en)
DE (1) DE2361068A1 (en)
FR (1) FR2253930A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527701A1 (en) * 1982-06-01 1983-12-02 Bammert Karl DRY OPERATING MACHINE
EP0104265A1 (en) * 1982-09-24 1984-04-04 Hitachi, Ltd. Method for producing a pair of screw rotors of a screw compressor
EP0106912A1 (en) * 1982-10-25 1984-05-02 Hitachi, Ltd. Screw rotor machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827736C2 (en) * 1987-08-26 1996-06-05 Volkswagen Ag Spiral displacement machine
JP2619468B2 (en) * 1988-04-06 1997-06-11 株式会社日立製作所 Oil-free screw fluid machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527701A1 (en) * 1982-06-01 1983-12-02 Bammert Karl DRY OPERATING MACHINE
EP0104265A1 (en) * 1982-09-24 1984-04-04 Hitachi, Ltd. Method for producing a pair of screw rotors of a screw compressor
EP0106912A1 (en) * 1982-10-25 1984-05-02 Hitachi, Ltd. Screw rotor machine

Also Published As

Publication number Publication date
DE2361068A1 (en) 1975-06-19
BE823067A (en) 1975-04-01

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Legal Events

Date Code Title Description
ST Notification of lapse