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 outletInfo
- 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- Withdrawn
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.
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)
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)
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 |
-
1973
- 1973-12-07 DE DE19732361068 patent/DE2361068A1/en active Pending
-
1974
- 1974-12-06 BE BE151261A patent/BE823067A/en unknown
- 1974-12-09 FR FR7440297A patent/FR2253930A1/en not_active Withdrawn
Cited By (3)
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 |