Mechanical seal with controller for regulating face contact pres

Details Mechanical seal with controller for regulating face contact pres Mechanical seal with controller for regulating face contact pres

1996-05-03

1998-06-09

DePumpo, Daniel G.

Seal for a joint or juncture

Process of dynamic sealing

Relatively rotatable radially extending sealing face member

277319, 277387, F16J 1532

Patent

active

057623422

ABSTRACT:
A mechanical seal assembly for creating a sealing relationship between a housing and a shaft which is rotatable relative thereto. The seal assembly includes first and second coaxially aligned and axially adjacent seal rings disposed in an encircling relationship to the shaft and having axially adjacent and opposed flat seal faces for creating an annular sealing region therebetween. The first and second seal rings are respectively nonrotatably coupled to the housing and the shaft. A chamber is defined adjacent one seal ring and is in communication with a controlled pressurized fluid source which supplies a fluid to the chamber. The chamber opens toward a rear surface of the seal ring to apply a closing force to the seal ring to axially move the seal ring toward the opposing seal ring. The controlled pressurized fluid source is operatively connected to an operating condition sensor, preferably a temperature differential sensing arrangement, which detects the condition of a fluid film between the sealing faces and adjusts the pressure on the first seal ring to vary the gap condition.

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