SU456162A1 - Torque measuring device - Google Patents

Description

The invention relates to a measurement technique and can be used in friction testing of materials.

The known devices comprise a shaft with a friction test sample and a lever mounted in bearings of a movable body, which is housed in a stationary case with the possibility of axial movement, and an elastic force meter, mounted on the movable body and in contact with the lever.

A disadvantage of the known devices is the effect of vibration loads and friction in the guides between the movable and fixed bodies on the measurement accuracy and reliability of the design.

The purpose of the invention is to improve the measurement accuracy and reliability of the design.

This is achieved by the fact that, in the device, the movable body is installed in a fixed case that can be rotated around an axis, for example, in support bearings, and is provided with a bowl.

A device for measuring torque is shown in the drawing.

The shaft 1 with the test sample 2 rotates in the supports of the movable body 3. With the shaft 1, the lever 4 is rigidly connected, which through the prism acts on the elastic element 5

force meter (of any of the known types), mounted on the housing 3.

The housing 3 is mounted in a fixed housing 6, for example, on roller plates or on bushings.

The body 7 is rigidly connected by a rod 7 with a weight 8, forming a shaft. The device works as follows. Sample 2 is applied by force P to another test sample, not shown in the drawing, which is rotated. The moment of friction Mtr between the samples tends to turn shaft 1 and deforms the elastic element 5 of the load cell, the electrical signal of which is proportional to the magnitude of the measured moment.

Accordingly, the body 3 with a tank is deflected at some angle. During operation, the housing 3 is practically stationary, since it represents a low-frequency oscillatory system. The weight of the load 8 can be due to an increase in the lever arm 7 sufficiently small, besides, it remains constant and does not depend on the measured moment and, accordingly, improves metrological indicators.

Thus, the effect of vibration loads and friction on the measurement results is eliminated by supplying the movable body with a magnet acting as a damping element and installing the movable body 3 with the possibility of rotation around the axis.

Subject invention

A torque measuring device comprising a shaft with a friction sample under test and a lever mounted in bearings of a movable body that is housed in a stationary body with the possibility of axial movement, and an elastic meter measuring device mounted on the movable body and donating with a lever different in that In order to improve measurement accuracy and reliability of the design, in it a movable body is installed in a fixed case that can be rotated around an axis, for example, in support plates, and is equipped with a barrel.

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