Rotary compressor with improved bore configuration and lubrication system
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United States of America Patent
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May 10, 1994
Grant Date -
N/A
app pub date -
Sep 14, 1992
filing date -
Sep 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary compressor, such as a sliding vane compressor, comprises a housing having a bore, a rotor assembly operatively arranged to rotate within the bore, vanes operatively arranged at the rotor assembly to move linearly relative to the rotor assembly and to form, together with the housing and rotor assembly, variable chambers, and a valve assembly arranged in the housing. The bore has a configuration divided into a expansion region of elliptical shape, a circular transition region, a polynomial-shaped compression region and a circular sealing region. The lubricant seal is composed of an oil injection port and oil grooves for trapping and transporting the oil. The valve assembly is provided in a recess portion of the housing and is configured as a thin blade covering each discharge port which has been relieved to minimize undesirably large difference of the pressure forces between the two sides of the blade. Oil grooves are provided in the rotor assembly and in end cap assemblies. In addition, the area seal and lubricant seal can be utilized in other types of compressors such as a rolling piston-type rotary compressor.
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