| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-stage oil-cooled compressor device that supplies oil to a bearing even if suction pressure and discharge pressure change.SOLUTION: A two-stage oil-cooled compressor device 1 results from connecting in series a first-stage compressor unit 8 and a second-stage compressor unit 9 that compress a gas by means of a male-female pair of screw rotors 11 and 16. The compressor device 1 includes a first oil supply duct 27 that extracts oil from the enclosed space 17 in the midst of being compressed in the second-stage compressor unit 9 and supplies the result to intermediate bearings 21 and 22 between the first-stage compressor unit 8 and the second-stage compressor unit 9, an oil separator 2 that separates oil from gas discharged by the second-stage compressor unit 9, and a second oil supply duct 28 that supplies the oil separated by the oil separator 2 to the intermediate bearings 21 and 22. When the pressure of the intermediate bearings 21 and 22 is greater than the oil supply pressure to the second oil supply duct 2, oil is supplied to the intermediate bearings 21 and 22 via the first oil supply duct 27. |
