AN EXPERIMENTAL STUDY OF THE SHAFT OIL SUPPLY MECHANISM OF A ROTARY COMPRESSOR

摘要

This paper describes the experimental study of the shaft oil feed mechanism of a rotary compressor. The oil contained in the shaft in which an oil pump is inserted is fed to the respective sliding surfaces of the subbearing section, eccentric section and main bearing section of the shaft by centrifugal force of shaft rotation. The oil feed pressure of shaft rotation is approximately 0.1 kg/cm~2. In addition, the oil slot of the main bearing acts as a viscous pump and its oil feed capacity is only a fraction of the capacity of the shaft. In a compressor, oil is forced to the respective sliding surfaces by the centrifugal oil feed pressure of the shaft. The oil slots of the subbearing section, eccentric section and main bearing section of the shaft, and the clearances between the sliding surfaces of the compression chamber act as resistance to the oil flow. If oil leakage into the compression chamber is excessively large, the amount of oil fed to other sliding surfaces will decrease. Therefore, the amount of oil leakage into the compression chamber must be considered in regard to the oil feed capacity of the shaft.