SU726460A1 - Device for measuring antifriction bearing rigidity - Google Patents

Description

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The invention relates to mechanical engineering and can mainly be used in the bearing industry. ;

A device for measuring the stiffness of a angular contact ball bearing is known, which contains a vibrator, an indicator and a series-connected forced oscillator and a loading unit with a load sensor 1.

However, the device does not have a sufficiently high measurement accuracy. ,

The purpose of the invention is to improve the accuracy of measuring the stiffness of a rolling bearing. The goal is achieved by the fact that the device is equipped with a variable load filter, a selection unit

constant component load,

a scale conversion unit and successively connected filter banks, oscillation amplitude differences, an oscillation amplitude multiplication circuit, an integrator unit, a compliance determination unit, a delay circuit, an inverse transform unit whose output is connected to the first indicator input, the third output of the loading unit with a load sensor 1x through block ma- the head transform is connected to the second input of the indicator, the first output of the loading unit with the load sensor is through a variable load filter, the multiplication circuit of the amplitudes of oscillations is connected to the second input of the compliance determination unit, and its second output is connected to the second input of the delay circuit through the selection unit of the second component and, and the second output of the scale-conversion unit is connected to the second input of the integrator unit, and the OUT of the vibrator transducer is connected to the input of the filter unit. . - -.,; ;

The drawing shows a block diagram of a device for measuring the stiffness of a rolling bearing.

The test bearing 1 is mechanically connected by a load unit with a load sensor 2 designed to create constant and variable loads and a generator of 3 Forced Oscillations setting the frequency of change of the variable load. The vibrator 4 is mounted on the bearing 1 and serves to issue

signals g of the corresponding oscillations of the bearing 1, the vibrator 4 is connected in series with the filter unit 5, the oscillation amplitude circuit 6, the amplitude amplitude circuit 7, the amplitude multiplication circuit 7, the integrator assembly 8, the compliance determiner unit, the delay circuit 10, the inverse conversion unit 11 and the indenter 12 loading with the load sensor 2 is connected via a filter-13 variable load to the input of the circuit 7 multiplying amplitudes over the scale conversion unit 14 with the inputs of the indicator 12 and the integrator block 8 and through the 15 in block Selection of a constant signal with an input of delay 10. The output of the amplitude multiplying circuit 7 is connected to the input of the detection unit 9, a flexible

The device works in the following way.

A loading unit with a load sensor 2 generates a load corresponding to a constant component of the load acting on the test bearing 1, and also determines the value of the amplitude of the load change. The generator of 3 forced oscillations is turned on, according to the signal of which the loading unit with the load sensor 2 generates a harmonic load oscillation within the specified limits i with a given frequency. Variable load causes forced oscillations of the tested bearing 1. The vibrator 4 is in contact with the bearing 1 and sends a signal to the unit.

5filters From block 5 of the filter signals corresponding to the amplitude of the oscillations are fed to the input of the circuit

6 the differences of the amplitudes of the oscillations, the signals from the output of which are transmitted, to the first input of the circuit 7, multiply the amplitudes of the oscillations. The signals generated at the first output of the Load cell from the load sensor 2 through the variable load filter 13 are directed to the second input of the circuit 7 multiplying the amplitudes of the oscillations. The signals from the first output of the circuit 7 are received

to the first input of block 8 of integrators, and the signal from its second output to the second input of block 9 for determining compliance. Signals from the output of the integrator block are sent to the first input of block 9, corresponding to the output of the amplitude differences oscillating by the inverse load value for the time period specified by the scale conversion block .14.

The signal obtained at the output of the compliance determination unit 9, corresponding to the compliance of the subsidiary 1, is transmitted to the reverse conversion unit J1 with a time delay created by the delay circuit 10. The time delay value is determined by the delay circuit 10 in accordance with the constant component load signal received from the second output of the loading unit with the load sensor 2 through the constant component allocation unit 15. A signal from the output of the inverse conversion unit 11, corresponding to the stiffness value of the bearing 1, is received at the first input of the indicator 12, the second input of which through the scale conversion unit 14 receives a signal from the third output of the loading unit with the load sensor 2. Indicator 12 determines the stiffness value of the tested bearing 1 at a given load interval.

Claims (1)

Invention Formula Device: for measuring the rigidity of a rolling bearing, containing a vibration transducer, an indicator and a generator of forced oscillations connected in series, a loading unit with a load sensor, which is due to the fact that, in order to improve the measurement accuracy, it equipped with a variable load filter, a block of constant load compensation, a scale conversion unit and successively connected filter block, a circuit of the amplitude difference of the oscillation amplitudes, a multiplier circuit of the amplitude of the oscillations, a block of integrators, a block for determining the compliance, a delay circuit, an inverse transform unit, whose output connections to the first input of the indicator, and the third output of the loading unit with the load sensor is connected to the second input through a scale conversion unit The first output unit loaded with a load sensor through the filter variable load circuit multiplying the amplitudes of oscillations is connected co a second input unit for determining compliance, and its second output from block allocating a constant component load is connected to the second input of the delay circuit, and secondly the output of the scale conversion unit is connected to the second input of the integrator unit and the output of the vibrator is connected to the input of the filter unit, Sources of information taken into account in the examination 1, Yaranova-I, A ,, Kaptur G.Е., On the effect of axial load on change axial stiffness of non-rotating angular contact ball bearings. Scientific and Technical Coll. Bearing industry, 1969, p. 3-5,