Measuring and testing – With fluid pressure – With ram pressure inducer
Patent
1989-03-31
1990-03-06
Raevis, Robert R.
Measuring and testing
With fluid pressure
With ram pressure inducer
73167, 73 496, G01M 304
Patent
active
049055020
ABSTRACT:
A pressure vessel fatigue test system has an adjustable mounting arrangement for a pressure vessel that can have open ends or closed ends, and which is to be subjected to a very high value, short duration pressure pulses, under controlled test conditions, to determine fatigue life of the vessel. In order to provide a pulse of high pressure that smiulates pulse pressures that may be present in the vessel, a cylinder having a bore filled with hydraulic oil is open to the interior of the vessel, and the vessel is also filled with hydraulic oil. A pressure generating piston is slidable in the bore or the cylinder and has a substantial mass that is attached to it. The mass is accelerated rapidly under control of an actuator in response to a control signal. When the piston first moves from a retracted position the oil in the cylinder bore is displaced into a low pressure accumulator. After the piston moves a sufficient distance so that the velocity of the mass has reached a desired level and there is substantial kinetic energy in the system, the plunger seals off a bore and the piston and mass decelerate rapidly and a pulse of pressure is applied to the test vessel across a short span of time.
REFERENCES:
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patent: 2326345 (1943-08-01), Ernst et al.
patent: 3693432 (1972-09-01), Stewart et al.
patent: 3842665 (1974-10-01), Sober
patent: 4263807 (1981-04-01), Brown et al.
patent: 4274290 (1981-06-01), Gram
patent: 4290343 (1981-09-01), Gram
MTS Systems Corporation
Raevis Robert R.
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