SU611128A1 - Stand for measuring friction moment in antifriction bearings - Google Patents

Description

on it being tested. rolling bearing 4, test head 5 with rings 6 and 7, using ferromagnetic dielectric, electromagnetic device 3, located perpendicular to the axis on plate springs 9 and creating for the test bearing a radial load, electromagnetic device Yu, coaxially located with shaft 3 and used to create an axial load on the test bearing. The electromagnetic device 10 comprises a housing 11 made of a non-magnetic material in the form of a ring, on one of the ends of which in blind holes there are separate circular electromagnets 12 with cup-shaped cores 13 and with independent regulated power sources, which allows displacement relative to axes of 3 jo axial axial load vector. Electromagnetic device 10 is rigidly connected to the end of the parried elastic element 14 (for example, with the end of a cylindrical cutting spring), the second end 25 of which is rigidly connected to the body 1 of the stand.

The test head 5 has a housing 15 and a screen 16 made of a non-magnetic material. The screen 16 serves to separate; 30 the magnetic cores of the electromagnetic devices 8 and 10 to eliminate the interaction of the magnetic fields of the electromagnets.

The test head 5 is equipped with a tenometric beam 17. Measurement of radial and axial loads is made by devices 18 and 19. The stand is powered and controlled by block 20,

The stand works as follows.

The rotation from the actuator 2 is transmitted to the shaft 40 3 and the inner ring of the tested subunit 4 mounted on it. As a result of the interaction of the electromagnetic devices 8 and 1 O with the rings 6 and 7, the test bearing 4 is loaded with the required radial and axial loads. The torque of the threaded bearings 4 of the test bearing 4 is transferred through the test head 5 to the tonometer beam 17. The radial and axial loads acting on the test bearing 4 are determined by measuring the deformations of the spring 9 and the elastic element 14.

The manufacture of rings 6 and 7 from a ferromagnetic dielectric eliminates the induction of currents in the rings when interacting with electromagnets 8 and 10, which increases the sensitivity of the test head 5 and, consequently, improves the accuracy of measurement of the moment of friction of the tested subunit.

the invention

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about rmu l and

A bench for measuring friction torque in rolling bearings, comprising a housing, an actuator, a shaft with a test rolling bearing mounted on it, a test head with rings, devices for generating radial and axial loads on the test bearing, executed in the form of electromagnets interacting with the ring 1 and the test head and instrumentation equipment, characterized in that, in order to improve the accuracy of measuring the frictional moment, the electromagnet for creating an axial load comprises a housing made from a non-magnetic material in the form of a ring, with holes located around the circumference from one end, in which separate circular electromagnets with bowl-shaped cores and with independent controlled power sources are placed, with the body of the electromagnet connected to the body of the stand through a calibrated elastic element, for example, cylindrical split spring.

Sources of information taken into account in the examination:

1. USSR Author's Certificate No. 453601, M.C., QO1 Ml 3 / O4, 1972.