SU59029A1 - Device for determining axial shaft pressure - Google Patents

Description

In Pyrezhnye, laboratory and similar machines and tools it is often necessary to directly determine the pressure directed along the axis of the working shaft during operation of the machine.

The proposed device is intended for such determination of the axial pressure of the shaft by means of a spring dynamometer.

It consists of two rings loosely mounted on the end of the test shaft, mutually touching surfaces sandwiched to each other, one of which is enclosed by a yoke associated with a spring dynamometer.

By the indications of this dynamometer, it is possible to judge, with the onset of the axial pressure transmitted by the shaft under the shaft to rings, the value of the measured pressure at. the onset of an equilibrium between the moment of frictional forces of the contacting surfaces of the rings and the opposing moment of the force of the spring of the dynamometer.

In FIG. 1 shows the front view of the device with the front cover removed; FIG. 2 is a longitudinal section through AA of FIG. one; FIG. 3 - a general side view.

Between the radial bearing 1 and the thrust ball bearing 2 at the end of the shaft on the side of the thrust bearing, two rings 3 and 4 are freely seated on the shaft. In the presence of axial pressure, the rings are clamped by the force of this axial pressure between bearings 1 and 2 and, during rotation rotate with it.

The ring 4 is enclosed by an annular yoke 5 consisting of two parts connected by a hinge 6. The shanks 7 and 8 of these two parts of the yoke protrude outside the housing 9 of the bearing and are connected by a screw 10, with which you can bring these shanks together, squeezing 5 ring 4. Lower shank 8 acts somewhat further and is connected by a spring 11, which plays the role of a dynamometer, to the supporting structure. At the end of the shank 8 there is an arrow with which it is possible to make readings on the corresponding graduated scale 12.

If during rotation of the shaft the ring 4 is compressed by the ferrule 5 with the aid of the screw 10, then the ferrule 5 will begin to rotate together with the ring 4 and at the same time will stretch the spring 11 until

until the elasticity of this spring balances the friction between rings 3 and 4, after which the ring of the thrust ball bearing 2 stops and the ring 3 rotates, slipping around the ring 4. If the rings 3 and 4 are ground on the contact surface, then the coefficient of friction on the surface in certain granides of pressures and speeds, it can be assumed constant and, therefore, the friction force of ring 3 over ring 4 will be proportional to pressure. Graduation of scale 12 should be done with an experienced one. —Yyyyyyyyy of p-ring 4 different fpysaMHv

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The subject matter of the invention.

A device for determining the axial pressure of the shafts using a spring dynamometer, characterized by the use of rings 3, 4 loosely mounted on the shaft, mutually in contact with ground surfaces, one of which is covered by a yoke connected to a spring dynamometer the pressure transmitted to the rings 3, 4 by the support part 1, determining the pressure at the onset of an equal weight between the moment of frictional forces spread over the contact surface of the rings and the opposing torque force spring dynamometer.

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