Patent ID: 6845985
Filing Date: 2005-01-25
Classification: F16J,Y10S

Abstract:
1. A rotating mechanical seal comprising: a sliding ring ( 5 ) being attached to a shaft ( 1 ) by an O-ring ( 6 ), the sliding ring rotating with the shaft ( 1 ); and a non-rotating backing ring ( 4 ) which is attached by way of an O-ring ( 3 ) to a housing ( 2 ) of a compressor so as to be gas-tight, wherein the sliding ring ( 5 ) and backing ring ( 4 ) are pressed one against the other by way of a spring ( 8 ) to form a seal and slide one upon the other, and wherein one of the rings ( 4 , 5 ) is made of a carbon and silicon carbide composite material and the other of a silicon carbide material, wherein the carbon and silicon carbide composite material exhibits sealing surface properties with a roughness value of from 0.005 to 0.07 μm and the silicon carbide material exhibits sealing surface properties with a roughness value from 0.002 to 0.03 μm, expressed as mean arithmetic roughness (R