SU1647299A1 - Apparatus for measuring torque - Google Patents

Abstract

The invention relates to load measuring technology and can be used in test benches. The aim of the invention is to enhance the functionality by enabling the determination of the sign of the moment. The device contains an elastic shaft 1, a hollow sleeve 2, two sealed chambers 3, 4 with elastic walls, a transparent capillary 5 connecting them with a scale of 6 and a drop of 7 spring-loaded liquid, two stops 8. 9 as well as the floor sleeve 2, connected to the shaft 1. When transmitting the torque, one of the stops 8, 9 presses on the wall of the corresponding chamber 4.3, when this occurs the redistribution of pressures in the chambers 3.4, which reflects on the position of the drop 7 relative to the scale 6, which reads of the moment. 2 Il.

Description

1

The invention relates to load measuring technology and can be used in test benches.

The aim of the invention is to enhance the functionality by enabling the determination of the sign of the moment.

FIG. 1 shows the structure of the device; in fig. 2 is a section A-A in FIG. one.

The device for measuring the torque contains an elastic shaft 1, a hollow sleeve 2, where sealed chambers 3 and 4 with elastic walls, a transparent capillary 5 with a scale of 6 and a drop of 7 tinted liquid, two stops 8 and 9 attached to the shaft 1 through the sleeve 10. Chambers 3 and 4 are equipped with valves 11 and adjustment screws 12.

The device works as follows.

The adjustment screws 12 are set to the middle position. Through the valves 11, the hermetic chambers 3 and 4 are uniformly filled with air, while the droplets 7 in the capillary 5 remain stationary. Then, the adjusting screws 12 of the drops 7 are set to the zero mark of the scale 6. The device is calibrated in statics.

Next, run the test setup. Under the action of the torque, the shaft 1 is twisted. The sleeves 2 and 10 installed on it are displaced relative to each other. In this case, the stop 8 presses against the wall of the hermetic chamber 4, and the pressure of the stop 9 on the wall of the hermetic chamber 3 weakens. As a result, air pressure in chamber 4 increases, while in chamber 3, the pressure decreases by the same amount. In this case, the drop 7 in the capillary 5 will shift towards the chamber 3. The amount of displacement is determined,

for example, by using a strobe light on a stopped scale-b and is proportional to the measurement of the torque. The sign of the torque is judged by the direction of displacement of the drop 7.

When the sign of the moment changes, the stop 9 will press against the wall of chamber 3, and the effect of the stop 8 on the wall of chamber 4 will weaken. As a result, the pressure in chamber 3 will increase, and in chamber 4 it will decrease by

same value. In this case, the droplet 7 will shift towards the chamber 4.

Claims (1)

Claim device A device for measuring torque, comprising a shaft, two sealed chambers interconnected and a transparent capillary with a scale, characterized in that, in order to extend the functional capabilities by making it possible to determine of the moment sign, a sleeve is placed in it, mounted concentrically to the shaft, made elastic, and attached to it at one end, two stops, connected at the same ends with the shaft at the same predetermined distance from the point of attachment of the sleeve, on the outer surface of which both sealed chambers are mounted connected to each other with a capillary in which a drop of colored fluid, with the other ends of the stops are pressed against the walls of the respective sealed chambers. J