SU934289A1 - Device for monitoring friction mode of rolling-contact bearings - Google Patents

Description

(54) DEVICE OF CONTROL OF THE MODE OF FRICTION IN THE BEARINGS OF ROLLING

The invention relates to the bearing industry and can be used to control the mode of friction in rolling bearings.

A device for controlling the friction mode in rolling bearings, comprising a series-connected stabilized power source, a switched voltage divider, a matching amplifier, a low-pass filter, a switch and a measuring device, and a Q current collector connected to the output of the switched voltage divider 1 are known. ..

However, the known device has a low accuracy control of the friction mode in rolling bearings. The purpose of the invention is to improve the accuracy

control of friction mode in rolling bearings.

The goal is achieved in that a device comprising a series-connected stabilized power source, a switched voltage divider, a terminating amplifier, a low-frequency filter, a switch, a measuring instrument, and a current collector connected

with the output of the switched voltage divider, equipped with an amplitude detector, the input of which is connected to the output of the matching amplifier, and the output - with the second input of the switched voltage divider, connected in series by the first adder, the first and second inputs of which are connected to the second and third outputs of the switched voltage divider , a comparator, the second input of which is connected to the first output of the switched voltage divider, a signal converter, a second adder, a discriminator and a signaling device, as well as e digital frequency meter, the input of which is connected to the output of the comparator, the output of the converter

The 15th signal is connected to the second input of the switch, and the output of the low-pass filter is connected to the second input of the second adder.

The drawing shows the block diagram of the device.

The device contains a series-connected stabilized power supply 1, a switched voltage divider 2, a matching amplifier 3, a low-frequency filter 4, a switch 5, a measuring instrument b, and a current collector 7 connected to the output of the switched voltage divider 2. The device is also equipped with an amplitude detector 8, the input of which is connected to the output of the matching amplifier 3, and the output to the second input of the switched voltage divider 2. The device contains serially connected first su.mmator 9, the first and second inputs of which are connected to the second. and the third output of the switched voltage divider 2, a comparator 10, the second input of which is connected to the first output of the switched voltage divider 2, a signal converter 11, a second adder 12, a discriminator 13 and a signaling device

14, as well as a digital frequency meter 15, the input of which is connected to the output of the comparator 10. The output of the signal converter 11 is connected to the second input of the switch 5, and the output of the low-frequency filter 4 to the second input of the second adder 12.

The device works as follows.

From the stabilized power supply 1, the switched voltage divider 2 and the current collector 7 supply the voltage to the test bearing. The voltage between the bearing rings is proportional to its resistance and depends on the internal resistance of the stabilized power source 1. This voltage is applied to the matching amplifier 3, the filter

4 low frequency, switch 5 and measuring device 6. Simultaneously, the voltage from the output of the switched divider

2, the voltage is applied to the input of the comparator 10, which switches if this voltage is higher or lower than the set threshold. The signal from the comparator 10 is supplied to a digital frequency counter.

15, measuring the switching frequency of the comparator 10, and through a signal pulse converter 11 with pulse-width modulation

to constant voltage and switch

5 on the measuring device 6. The voltage setting threshold for the operation of the comparator 10 is fed through the first adder 9 from the switched voltage divider 2 and the amplitude detector 8. Simultaneously

the voltage from the output of the low-frequency filter 4 and the signal converter 11 is fed to the second adder 12, and the difference of this voltage to the discriminator. 13 and the detector 14.

The proposed device provides additional information on the condition of the bearings and lubrication, which makes it possible to reduce the laboriousness of the tests and improve the accuracy of determining the service life of the bearings.

Claims (1)

Invention Formula A friction mode monitoring device in rolling bearings containing a series-connected stabilized power source, a switched voltage divider, a matching amplifier, a low-pass filter, a switch, a measuring device, and a current collector connected to the output of a switched voltage divider, characterized in that the purpose of improving the control accuracy, it is equipped with an amplitude detector, the input of which is connected to the output of the matching amplifier, and the output - to the second input of the switched divider on pitch, serially connected by the first adder, the first and second inputs of which are connected to the second and third outputs of the switched voltage divider, a comparator, the second input of which is connected to the first output of the switched voltage divider, a signal converter, a second adder, a discriminator and a signaling device, and digital frequency meter, the input of which is connected to the output of the comparator, while the output of the signal converter is connected to the second input of the switch, and the output of the low-frequency filter - from the second the second input of the second adder. Sources of information taken into account in the examination 1. Dorogan V.V., Korchagin Yu.V., Pavlyukov A.I. Application of adjustable threshold devices in the study of rolling bearings. Works NKI, vol. 139, Nikolaev, 1978, p. 128-132 (prototype).