Mechanical seal for a compressor and centrifugal compressor comprising the mechanical seal

摘要

The mechanical seal for a compressor comprises a support member fixed to a rotary shaft for rotating therewith, an annular rotating slide member consisting of hard materials and being fitted to the support member by shrinkage, and a stationary slide member exerting pressure against an end surface of said rotating slide member. In order to prevent damage by shrinkage stress and a displacement of said rotating slide member, said rotating slide member comprises at least one peripheral recess formed by a portion of the periphery of said rotating slide member having a smaller outer diameter than the rest of the periphery and said support member comprises an inwardly extending fitting portion engaging the peripheral recess.