MECHANICAL SEAL FOR COMPRESSOR

摘要

A mechanical seal for compressor, wherein a mating ring (31) on the stationary side is made of a self-lubricating sliding material and a circumferentially continued sliding projection (31a) is formed at the end part thereof facing a seal ring (32) side, the seal ring (32) on the rotating side is made of a hard sliding material larger in Young's modulus than the self-lubricating sliding material and fitted axially movably to a rotating shaft (2) through a shaft packing (34), whereby, because any sliding projection is not formed on the seal ring (32), an axial length L on which a pressure difference between a pressure and the atmospheric pressure acts becomes shorter on the mating ring (31) side rather than at a part sealed by the shaft packing (34), a deformation due to the pressure difference is reduced because of higher Young's modulus, and thus an uneven wear on a sealed sliding surface S due to the deformation can be suppressed. <IMAGE>