SU941866A1 - Rolling bearing diagnostic method - Google Patents

Description

ISO is related to measurement technology, and more specifically concerns methods for determining the performance parameters of rolling bearing bearings.

A known method for diagnosing rolling bearings consists in strengthening the strain gauges on the outer ring of the bearing at its diametrically opposite points and mounting it with the shaft into the support, loading it with a radial load, fixing the signals of the strain gauges and determining the bearing state parameters.

The disadvantage of the known method is the impossibility of precisely refuting the size of the mounting gap, as the most important indicator of the state of the bearing.

The purpose of the invention is to show the effectiveness by determining the mounting clearance in the bearing.

The goal is achieved by the fact that according to the diagnostic method. Rolling bearings enclosed in reinforcement on the outer ring of the test bearing of the strain gauges in its diametrically opposite points, installing the tested bearing with the shaft in the support, loading the shaft with a radial force in the plane of the strain gauges installation, fixing the signal strain gauges and determining the state of the bearing, before loading the shaft, it is reported to move at a constant speed, the opposite of the direction of application of the load and fi siruyut time between the disappearance of the signal from one tensor.

10 of the resistor and the appearance of it from another, and the state of the bearing is determined by the size of the gap, which is determined by multiplying the time obtained by the amount of movement speed

15 shaft.

Figure 1 shows a flow chart of the method; figure 2 - waveform of the signals of the strain gauges.

In case 1 supports mounted

20 test bearing 2 with strain relief. tori 3, 4 and shaft 5.

P is the load applied to the shaft, V is the speed of the shaft movement.

The line OAB is the signal from the strain-relief device 4, the ACE line is the signal from the strain-gauge 3.

Section T is the time of absence of signals from strain gauges.

To implement the method in support

Claims (1)

30 mount the bearing 2 with the strain gauges 3, 4 and the shaft 5 attached to the diametrically opposed points of the outer ring. The shaft 5 is loaded with force P in the plane of attachment of the strain gages. After a load from a tenore eistor 4 is applied, a signal of constant magnitude appears - the OA line. Further, the shaft 5 is reported to move at a constant speed. At the same time, the signal from the strain gauge 4 is reduced - the AB line to disappear. For some time, T signals from strain gauges 3 and 4 are missing. Then a CE signal line appears from the strain gauges 3. Time T characterizes the installation clearance. The size of the mounting gap is determined by the product of time T and the speed of movement V. The method makes it easy to determine and control the installation gap in real conditions of the bearing operation during its service life without breaking the support. Claims of the invention: Method of diagnostics of bearings of cheni, consisting in strengthening on .i rtiJfiVi i, the outer ring of the test bearing of the resistance strain gauges in its diametrically opposed position efficiency, before the shaft is loaded, it is reported to move at a constant speed opposite to the direction of the load and fix the time between the disappearance of the signal from one The sensor and the appearance of it from another, the state of the bearings is determined by the value of - the gap, which is determined by multiplying the time received by the value of the speed of movement of the shaft, Sources of information taken into account in the examination 1. Eroshkn, A, And et al. Experimental Methods for Determination of Rolling Bearing Damage at an Early Stage - Durability and Diagnostics of Aircraft Engines, Issue B, M Mechanical Engineering, 1971 (prototype). BUT ABOUT G f) I 1 t f I I g F I