Mechanical face seal with minute pores in sliding surface

摘要

A mechanical seal having a fixed member airtightly fixed along the outer circumference thereof in a bearing house formed in the housing of a compressor, a support member mounted on the rotary shaft of the compressor received through the bearing house and supported rotatably in the housing, a rotary member airtightly mounted along the inner circumference thereof on the rotary shaft and a spring disposed between the rotary member and the support member to press the rotary member against the fixed member in the axial direction. The sliding surface of the rotary member to be in sliding contact with the sliding surface of the fixed member has a hardness of Hv 350 and above and minute pores of 30 mu m and less in maximum major diameter to retain lubricating oil therein so that the housing of the compressor is sealed to prevent leakage of the gas and the lubricating oil contained within the housing through the bearing house.