Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1987-10-23
1989-09-12
Hornsby, Harvey C.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 3, 277 81R, 277 88, F16J 1536
Patent
active
048653330
ABSTRACT:
The seal protection apparatus is intended to provide protection for a main mechanical seal. It comprises a first seal ring fast on the shaft of a pump and a second seal ring which is connected to the casing of the pump by means of a flexible, annular diaphragm which is exposed on one side to pumped product in the casing. The combination of seal rings and diaphragm define one end of a service liquid compartment which is supplied with pressurized, clean service water. The other end of the compartment is defined by the main seal. With a flow of service water to the compartment, the seal rings are forced apart by the water pressure. Water is able to leak between the rings into the casing thereby denying the pumped product access to the compartment and main seal. On the other hand, if the supply of service water should fail for any reason, the pumped product acts on the diaphragm and forces the seal rings together. The pumped product is again denied access to the main seal.
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Hornsby Harvey C.
Reinckens Corinne M.
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