Bypass flush system employing thermal bushing

Details Bypass flush system employing thermal bushing Bypass flush system employing thermal bushing

1977-02-09

1978-04-04

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 22, 277 26, 277 83, F16J 1516

Patent

active

040822974

ABSTRACT:
A bypass flush system for cooling and lubricating a mechanical seal assembly as used in association with a fluid handling apparatus, such as a centrifugal pump. A bypass line connects the mechanical seal assembly and the discharge side of the pump for permitting recirculation of a limited quantity of the fluid being pumped. To control the flow of bypass fluid, a flow control device is disposed between the seal assembly and the pumping chamber. The flow control device comprises a thermal bushing which permits the bypass system to operate with a minimum flow rate, while at the same time allowing accurate control of the small flow rate without the device becoming plugged with deposits and the like. Use of the thermal bushing for flow control also enables the bypass system to employ an air-cooled heat exchanger for cooling the fluid flowing through the bypass line. In a preferred embodiment, the thermal bushing has a thermal expansion rate slightly less than the thermal expansion rate of the shaft which it surrounds whereby the clearance between the shaft and the thermal bushing gradually and progressively decreases in response to temperature increases so as to maintain a substantially constant flow rate past the bushing.

REFERENCES:
patent: 2937039 (1960-05-01), Santapa
patent: 2948555 (1960-08-01), Wright
patent: 2971783 (1961-02-01), Laser
patent: 2995390 (1961-08-01), Gardner
patent: 3477729 (1969-11-01), Hershey
patent: 3539270 (1970-11-01), Derrickson
patent: 3843140 (1974-10-01), Mayer et al.

Affiliated with

Also associated with

Rating

Bypass flush system employing thermal bushing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bypass flush system employing thermal bushing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bypass flush system employing thermal bushing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-719698