AUTOMATIC SHUTDOWN SEAL

申请公布号：

US3679217(A)

申请号：

USD3679217

申请日期：

1970.10.27

申请公布日期：

1972.07.25

申请人：

ALLIS-CHALMERS MFG. CO.

发明人：

GERALD LESIECKI

分类号：

F16J15/00;(IPC1-7):F16J15/40

主分类号：

F16J15/00

摘要：

A rotary shaft seal is provided with a sealing fluid to seal a process fluid. A spring-biased mechanical shaft seal automatically closes and seals the process fluid from the atmosphere when the sealing fluid pressure is lost. During machine operation the pressure generated by the sealing fluid overcomes the force of the springs to open the mechanical seal.