4132 -- Method For Accelerating the Estimation of Wear in Rolling-Piston-Type Rotary Compressors PDF

Rolling-piston-type rotary compressors are widely used in air conditioners and refrigerators. A rolling piston rotates in a complex manner, and this behavior changes according to many factors, such as operating speed, load, and lubricant viscosity. This piston and the vane rub each other in a relatively reciprocating motion in line contact. To date it has been difficult to confirm the reliability of the compressor in a short time. This paper describes a useful means of estimating the wear rate of the vane and the piston 65 times faster than conventional life tests operated continuously. Using this method, the influence of the amount of oil supplied to the compression room on the wear of the area rubbed by the vane tip and the piston surface was investigated. The authors found that the rate at which the oil returns from the refrigeration cycle is important, as well as leaks through the vane slot gap or the side clearance of the rolling piston.

Units: SI