Pumps – Condition responsive control of drive transmission or pump... – Having means to hold or resist movement of pumping element
Patent
1976-02-26
1977-04-12
Croyle, Carlton R.
Pumps
Condition responsive control of drive transmission or pump...
Having means to hold or resist movement of pumping element
60413, 188116, 417223, F04B 4900, F16D 3102, B60T 712
Patent
active
040172171
ABSTRACT:
A protection system to prevent the failure of a flywheel caused by an overspeed condition of a fluid pump. A positive displacement pump is coupled to, and driven by, the drive shaft of the fluid pump, and the positive displacement pump circulates a fluid into a discharge manifold. The fluid exits from the discharge manifold through an orifice, and returns to the positive displacement pump to be recirculated. Brake shoes are arrayed around the flywheel, and are connected to hydraulic cylinders, which in turn is connected by conduits to the discharge manifold. A pressure sensitive valve is installed in the conduit between the discharge manifold and the hydraulic cylinder. The pressure sensitive valve permits fluid to flow from the discharge manifold to the hydraulic cylinder whenever the pressure within the discharge manifold exceeds a predetermined level. The pressure in the discharge manifold, in turn, is related to the speed of the positive displacement pump, which is dependent upon the speed of the main pump drive shaft. Upon an overspeed condition, the positive displacement pump increases speed, circulates an increased quantity of fluid, which causes an increase in the manifold pressure, thereby causing the pressure sensitive valve to open and supply fluid to the hydraulic cylinders, which forces the brake shoes against the flywheel to absorb the acceleration torque of the drive shaft and prevent the failure of the flywheel by overspeed.
REFERENCES:
patent: 3667816 (1972-06-01), Harned
patent: 3761141 (1973-09-01), Baurle et al.
patent: 3871714 (1975-03-01), Belrend
Croyle Carlton R.
Elchik W. A.
LaPointe G. P.
Westinghouse Electric Corporation
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