Hydrostatic torque measuring device for rotating shafts

Details Hydrostatic torque measuring device for rotating shafts Hydrostatic torque measuring device for rotating shafts

1978-06-16

1979-12-04

Goldstein, Herbert

Measuring and testing

Brake testing

Single wheel rotating and resistance measuring means

G01L 302

Patent

active

041765486

ABSTRACT:
An input shaft is provided with a cylinder and an output shaft is provided with a rotary wing piston in the cylinder. The rotary wing piston has two arms and together with two diametrically opposite cylinder cams forms two pairs of pressure chambers. Depending on the direction of torque, a pressure medium is supplied to one of the pairs of pressure chambers by means of two three way valves provided on the cylinder wall. The slits between the frontal surfaces of the cams and the opposing surfaces of the rotary wing piston throttle the outflow of the pressure medium out of the chamber pair. As a result of the automatically adjusting equilibrium between the applied torque and the compressive force in the pressure chamber pair, the pressure of the pressure medium supplied by a pump is a measurement for the magnitude of the transferred torque and can be read on a manometer. The throttle surfaces of the cylinder cams also simultaneously act as stops for the rotary wing piston, so that no angle discontinuity appears during a failure of the pressure medium. As a result of the large throttle surfaces on the cylinder cams and the opposing surfaces of the rotary wing piston, there is high rigidity of the torque transfer.

REFERENCES:
patent: 2322182 (1943-06-01), Walker
patent: 2398167 (1946-04-01), Walker
patent: 2935869 (1960-05-01), Shipley
patent: 3057193 (1962-10-01), Wiggermann
patent: 3383911 (1968-05-01), Wiggermann

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