US 3,945,765 AGranted

Refrigerant compressor

AssigneeSankyo Electric Company Limited

InventorsHiroshi Toyoda, Shigemi Shimizu, Kiyoshi Terauchi, Masaharu Hiraga

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Abstract

A refrigerant compressor having pistons reciprocated in respective cylinder by a wobble plate driven by an input rotor which is secured on a drive shaft, which compressor has a reduced volume and an improved lubricant system. An end plate of a housing for the compressor supports and bears the drive shaft and is formed with an oil port extending from a shaft seal cavity mounting a shaft seal of the drive shaft to a gap between the end plate and the rotor, with the drive shaft being formed with another oil port extending the shaft seal cavity and a gap between the rotor and the wobble plate whereby the lubricant oil flows through the gap between the rotor and the wobble plate, the oil port in the drive shaft, the shaft seal cavity, the oil port in the end plate, and the gap between the rotor and the end plate in the order. The rotor is formed with an annular recess on a surface thereof facing the end plate and in eccentricity from the rotating axis of the rotor. A valve plate secured between a cylinder block and a cylinder head is formed of a thin ground steel plate or a thin metal plate used for a spring and is formed with discharge and suction openings by punching. The cylinder head is formed with suction and discharge chambers partitioned with a partition wall means which has sharp end projections formed on an end surface thereof to bite into a gasket between the end of the partition wall and the valve plate to firmly secure the gasket. Two service valves are provided on a side surface of the housing which are communicated with the suction and discharge chambers, respectively, of the cylinder head through a hole extending in the cylinder block and the valve plate.

A refrigerant compressor having at least one piston reciprocated by means of a wobble plate means driven by an input rotor means and an input shaft means connected with said rotor means, a housing for said compressor including a cylinder block for said at least one piston and a sump chamber adjacent said cylinder block housing said wobble plate and said input rotor, a first end plate means on said housing including journal bearing means for bearing said input shaft, a shaft seal cavity and shaft seal means mounted on and around said input shaft in said shaft seal cavity, a second end plate means at the opposite end of said housing including refrigerant suction and discharge chambers and valve means selectively interconnecting the same with said cylinder block, first peripheral bearing means between said input rotor means and said first end plate means, second peripheral bearing means between said input rotor means and said wobble plate means, and lubrication oil contained in said sump chamber, which is characterized in that said input shaft has a first oil flow port extending from a first predetermined oil flow gap between said rotor means and said wobble plate to said shaft seal cavity and a second oil flow port communicating between said first oil flow gap and said journal bearing, said first end plate means comprising at least one third oil flow port extending from said shaft seal cavity to a second predetermined oil flow gap between said input rotor means and said first end plate means, and said input rotor means having an annular recess which is formed in a surface thereof facing said second oil flow gap and in eccentricity from the rotating axis of said rotor, whereby the lubrication oil flowing from said sump chamber to said second oil flow gap through said first oil flow gap, said first and second oil flow ports, said shaft seal cavity and said third oil flow port, said oil being returned to said sump chamber from said second oil flow gap after serving for lubrication of said journal bearing means, said first and second peripheral bearing means and said shaft seal means.

Abstract

Claims12