SU989347A1 - Method and device for determination of rolling bearing durability - Google Patents

Description

The invention relates to bearing • wick industry and can be mainly used to determine the durability of rolling bearings 5.

There is a known method for determining the durability of rolling bearings, which consists in measuring the rotation speed of the movable bearing ring jg ka under the action of axial and radial loads and a cage, finding their ratio and comparing this ratio with the calculated one, determining the bearing life £ 1).

However, the known method is characterized by ’5 low accuracy of determining the durability of the bearings.

Is there also known a device for determining the durability of rolling bearings, containing a drive shaft for installing the bearing being tested, a shaft angle mark sensor and series-connected rolling body sensors, a frequency divider and a comparison unit, an indicator 11 3. 25

The purpose of the invention is to increase the accuracy of determining the durability of bearings by taking into account the contact angle.

This goal is achieved by the fact that according to the method for determining the durability of a rolling bearing, the rotation speed of the rolling bearing ring is measured under the action of ¹ axial and radial load and the cage, their ratio is found, the obtained ratio is compared with the calculated one and the bearing life is judged by comparison , in the process of measuring the ratio of speeds of the movable ring and the separator, the radial load changes from zero to the maximum allowable value at a constant cause of axial load.

Device for determining the durability of rolling bearings, comprising a drive shaft for mounting the bearing under test, a shaft angle mark sensor and series-connected rolling element sensors, a frequency divider and a comparison unit, an indicator equipped with a frequency multiplier connected in series with an input connected to the output of the shaft angle mark sensor , a pulse shaper, a counter and a register, the output of which is connected to the second input of the indicator, as well as a set value calculator, an output. which is connected to the input of the comparison unit, while the second input of the pulse shaper is connected to the output of the frequency divider, and the second and third outputs, respectively, to the second inputs of the counter and register, the second output of which is connected to the second input of the comparison unit.

The drawing shows a block diagram of a device for implementing the method.

The device comprises a drive shaft 1 for mounting the test bearing, axial 2 and radial 3 loading units, a shaft rotation drive 4

I, the sensor 5 of the angle marks of the shaft 1, the output of which is connected to the input of the frequency multiplier 6 / series-connected sensor 7 of the frequency of the rolling elements, frequency divider 8, pulse shaper 9, counter 10, register

II, indicator 12, as well as a dial

-13 of the calculated value, the comparison unit 14, the output of which is connected-With the first input of the indicator 12, the first input of the comparison unit 14 is connected to the second output of the register 11, the second input is to the output of the set value generator 13. The output of the frequency multiplier 6 is connected to the first input of the pulse shaper 9, the second output of which is connected to the second input of the counter 10, and the third output is connected to the second input of the register 11.

The device operates as follows.

The monitored bearing is mounted on the shaft 1 of the drive 4. The axial unit 2 and the radial load unit 3 create the specified loads and the movable ring is rotated at a given speed. In this case, pulses are generated in the proximity sensor 5 of the angle marks, the frequency of which is proportional to the frequency. rotation of the drive shaft 4 and the number of marks on the disk rigidly mounted on the shaft. In the proximity sensor 7 of the frequency of the rolling elements, pulses are generated whose frequency is proportional to the speed of the separator and the number of rolling elements in the bearing. The signal from the output of the angle mark sensor 5 is fed to the input of the frequency multiplier 6, from the output of which, after multiplying by a constant number, the signal of the angle marks goes to the first input of the shaper. 9 pulses. The signal from the output of the rolling body frequency sensor 7 is fed to the input of a frequency divider 8, from which, after dividing by an integer multiple of the number of rolling bodies, a signal is input to the second input of the pulse shaper 9, the frequency of which is a multiple of the speed of the separator. Shaper 9 pulses generates on its first output pulses with a multiplied frequency of angle marks, arriving at the first input of the counter 10, and pulses from the second output of shaper 9 are fed to the second input of the counter 10 to set it to zero. From the third output of the shaper 9, write pulses follow to the second input of the register 11. In this case, the register 11 receives the result of measuring the ratio of the rotational speed of the movable ring to the speed of the separator received at the output of the counter 10. The signal from the register 11 is output to the second input of the indicator 12 and the first stroke of the comparison unit 14, the second input of which receives an signal corresponding to the calculated value of the monitored bearing from the output of the set point 13 of the calculated value. From the output of the comparison unit 14, the signal is fed to the input of the indicator 12, where ^ the measured value_ of the ratio of the rotational speed of the movable ring to the rotational speed of the separator and the deviation signal are indicated. This value is from the calculated value, which determines the durability of the bearing.

The proposed method and device can improve the accuracy of determining the durability of bearings.

Claims (1)

1. USSR author's certificate 347618, cl. C 01 M 13/04, 1972 (prototype).