Rotor cooling device in an oscillation type compressor

Claim 1

An oscillation type compressor comprising: a fixed compressor housing defining an axial bore, a cylindrical rotor having integral vanes extending radially from the periphery thereof in sealing contact with said housing axial bore, bearing means at opposed ends of said Housing for rotatably mounting said rotor for oscillation about the axis thereof, at least one carbon sealing member fixedly carried by each valve seat and being in rubbing contact with said oscillating rotor periphery thereof immediate of said vanes, said housing enclosing the extended edge of said bore and forming a chamber therewith, said rotor being bored axially from said one end, a cooling agent injection pipe fixed to said housing and extending within said rotor bore and forming with said rotor bore an annular coolant flow passage opening into said chamber, and a cooling agent discharge pipe connected to said housing and open to said chamber, whereby; cooling of said rotor in the vicinity of said peripheral contact with said carbon sealing member reduces the average abrasion rate of said carbon sealing member about eight fold.