STARTING LOAD REDUCING DEVICE FOR OIL COOLING TYPE SCREW COMPRESSOR

摘要

PURPOSE:To speedily carry out the acceleration of a motor by installing an oil tank at the position lower than that of a compressor and higher than that of an oil separator into an oil supplying piping for connecting a cooler and the compressor and connecting the oil tank and the oil separator through a check valve. CONSTITUTION:An oil tank 11 for temporarily storing the oil supplied into a compressor 1 is arranged at the position lower than that of the compressor 1 and higher than that of an oil separator 2. A cooler 5 and the compressor 1 are allowed to communicate through oil feeding pipes 4 and 12 in the upper part of the oil feeding tank 11, and the oil separator 2 is allowed to communicate to the lower part of the oil tank 11 through an oil recovering pipe 10 equipped with a check valve 9. Since the oil which forms the trouble on start of a motor does not exist in the compressor 1, starting the compressor 1 is easily carried out, and supplying a large quantity of oil having a large viscosity at a low temperature into the compressor 1 in the acceleration time of the motor is prevented and acceleration for the motor can be carried out speedily.