Measuring and testing – Blower – pump – and hydraulic equipment
Patent
1993-03-03
1994-04-26
Yasich, Daniel M.
Measuring and testing
Blower, pump, and hydraulic equipment
7386231, F16K 3105, G01L 500
Patent
active
053056370
ABSTRACT:
The axial force on the valve stem of a large valve can be related to the output of a strain sensor mounted on the yoke of the valve, but accuracy can be achieved only if the strain sensor is first calibrated by applying a known axial force to the valve stem. This can be done conveniently by using the invention, which includes two loading beams juxtaposed on opposite sides of the valve stem, elongated in a direction perpendicular to the valve stem, and including a split nut or a collet for gripping the valve stem. Legs extend from the ends of the loading beam assembly parallel to the valve stem, and one or both of these legs includes a hydraulic ram for applying force to one or both ends of the loading beam assembly. This applied force can be measured independently of the yoke-mounted strain sensor.
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Panian Michael G.
Westinghouse Electric Corp.
Yasich Daniel M.
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