Patent ID: 7347301
Filing Date: 2008-03-25
Classification: F04C

Abstract:
1. A lubricant supply system for a screw compressor having a slide valve, screw rotors, bearings for rotatably supporting the screw rotors, a first inlet for introducing gas to be compressed, and second and third inlets for separately introducing lube oil, the lubricant supply system comprising: a bearing oil supply system that supplies lube oil to the bearings of the screw rotors at low pressure via the second inlet; a temperature control oil supply system that supplies the lube oil into the the slide valve to supply the lube oil to the screw rotors at high pressure via the third inlet to control the temperature of compressed fluid being discharged from the compressor by contact with the lube oil, wherein the bearing oil supply system includes a closed oil supply line with an oil supply tank, an oil cooler, and an oil supply pump, and wherein the temperature control oil supply system includes a closed oil supply line with an oil separator and an oil cooler.