Valve system for capacity control of screw compressors
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United States of America Patent
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Jun 12, 1984
Grant Date -
N/A
app pub date -
May 6, 1982
filing date -
May 14, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a valve system for capacity control of an oil-injected screw compressor. One or more valves (17-20), preferably at least two valves, are located in the wall of the rotor barrel (12, 13). The pressure in the compressed-air tank of the compressor actuates control valves, which in their turn open or close the valves (17-20). When the valves are opened, a direct connection between two consecutive thread volumes of at least one of the rotors (14, 15) is established, whereby the closed space capable to be used for the internal compression, is reduced.
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