SU935733A1 - Method of rolling bearing diagnostics - Google Patents

Description

(54) METHOD OF DIAGNOSTICS OF ROLL BEARINGS

I

The invention relates to the bearing industry and can be advantageously used for the diagnosis of rolling bearings.

A known method for diagnosing rolling bearings by measuring their vibration 1.

However, the known method is characterized by low accuracy of rolling bearing diagnostics.

The purpose of the invention is to improve the quality of measurements and reduce the measurement time.

The goal is achieved by the method of diagnosing rolling bearings by measuring their vibration, extracting the vibration signal of rotating parts of a podishhnik, calculating the values of instantaneous frequencies of rotation of parts of the podshishka and judging by their change the state of the podishhnik.

The drawing shows a block diagram of an apparatus for carrying out the proposed method.

The device contains a series-connected vibration sensor 1, amplifier 2,

the first band-pass filter 3, the first device 4 in which the values of the instantaneous frequencies are present, the computing unit 5, the threshold device 6, the indicator 7. The device also contains in series the second band-pass filter 8, whose input is connected to the second output of the amplifier 2, and the second device 9 in the selection of the instantaneous values frequency, the output of which is connected to the second input of the computing unit 5.

ten

The method is carried out as follows.

The bearing vibration signal registered in vibration sensor 1 is amplified in amplifier 2, then the signal enters filters 3 and 8, where it is converted into vibration signals of individual bearing parts, the converted signals are sent to devices 4 and 9, the instantaneous frequencies in which the signals converted to instantaneous frequency values and then received

20 to computation block 5. In computation block 5, the instantaneous frequency values are converted into diagnostic signals, which are fed to a threshold device 6, in which

diapus sigals are compared with threshold values and, if exceeded, these values are converted into signals that enter indicator 7.

Claims (1)

The proposed method makes it possible to diagnose with greater certainty rolling bearing defects, which increases the accuracy of rolling bearing diagnostics. Invention Formula The way the bearings of rolling bearings are diagnosed by measuring their vibration, about tl and h ay; and so that, in order to improve the quality of measurements and reduce speNie measurements, the southern part of the vibration of the rotating parts of the hemmer was selected, the values of the instantaneous frequencies of rotation of the parts of the hem were calculated and the state of the bearing was judged by their change. Sources of information received during examination 1. Tsitovich I., S., et al. Kinematics and durability of rolling bearings of machines and devices. - Science and technology, Minsk, 1977, p. (prototype).