System and method for determining torque output of motor actuate

Details System and method for determining torque output of motor actuate System and method for determining torque output of motor actuate

1991-07-22

1993-03-30

Razavi, Michael T.

Measuring and testing

Dynamometers

Responsive to torque

73168, G01L 302

Patent

active

051973383

ABSTRACT:
A system for determining torque generated by a motor actuated operator driving a partial turn valve including a torque ring replacing the cover of the operator housing, a frictional shaft coupling member coupling the inner circumferential surface of the drive sleeve within the operator housing to the central shaft of a torque plug projecting from the operator through the torque ring. Two or more stops are provided projecting from the torque ring on either side of the central shaft. A cross member is provided extending radially outwardly from the central shaft of the torque plug to contact each of the stops when the operator is driven. A sensor, preferably an array of strain gauges mounted to the central shaft, generates a signal proportional to the torque applied by the operator to the operator housing through the frictional shaft coupling and the torque plug. The system can be used to calibrate torque switches typically associated with the motor actuator of the operator or corrolate another parameter of the motor actuated operator, such as an actuator spring pack force or displacement which varies with torque load, so as to measure torque indirectly from such parameter.

REFERENCES:
patent: 4498336 (1985-02-01), Dalton
patent: 4759224 (1988-07-01), Charbonneau et al.
patent: 4787245 (1988-11-01), Anderson et al.
patent: 4805451 (1989-02-01), Leon
Article "Get a Better Grip with Frictional Shaft Mounts" by Paul Dvorak, Machine Design, 7 pages.
"Limitorque Valve Controls" Manual Type HBC, Bulletin 15-73, 1 sheet, Linitorque Corporation.
"A Typical HBC Gear Operator", p. 3, Limotorque Corporation.

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