SU1423934A1 - Apparatus for inspecting the state of rolling-contact friction assemblies - Google Patents

Abstract

The invention relates to the measurement technique and m. used in rolling bearing tests. The goal is to improve the quality control of rolling bearings. The signal from the vibrator 1 through the switch 2, the preamplifier 3, the autonorm unit 4, the high frequency filter 5, the frequency characteristic block 6 enters the input of the peak detector 7. The voltage converter 8 is a frequency with the regulator 9 produces pulses in block 11 counters. The reference frequency generator 14 generates reference frequency pulses through dividers 15 and 16 to the counter 17 time intervals and the comparison circuit 18 with the measurement time switch 19. The comparison circuit 18, depending on the state of the measurement time switch 19, produces pulses for setting zero of the peak detector 7, arriving at the input of the zero detector of the detector 7, counting impulse of the voltage converter 8 - frequency, pulse of the initial installation of the meter block 11, arriving at the one-oscillator 20 with and through the OR circuit 21 to the setup input to the initial position of the meter block 11, the start pulse of the digital printing mechanism 29 arriving at the control input of the interface block 2B, and the switching pulse a channel counter 22, which is fed to the input of a channel counter 22. In this way, the operation of the blocks is synchronized. 1 w. and you with 4

Description

; The invention relates to a measuring technique and can be used when testing Rolling bearings.

The purpose of the invention is to improve the quality of monitoring the condition of rolling bearings by expanding the functional capabilities of the device.

The drawing shows a block diagram of the proposed device.

The device contains serially connected vibration transducers 1, switch 2, preamplifier 3, autonorm unit 4, high frequency filter 5, frequency response unit 6, peak detector 7, voltage – frequency converter 8 with external regulator 9, circuit 10, counter block 11 decoder 12 and indicator 13, reference frequency generator 14 and frequency divider 15 connected in series with the output; ohm frequency divider 15 second frequency divider 16, time counter 17 and comparison circuit 18 with time switch 19 nor, one-shot 20 and an OR 21 circuit, output connected to the input of the initial installation of the meter block 11, connected in series between the output of the comparison circuit 18 and the control input of the switch 2, the counter 22 of the channel with the switch 23 of the number of working channels and the second decoder 24 connected in series with the output the frequency divider 15 shaper pulse duty factor 23 and the over-switch 26, the output connected: to the second input of the switch 2, the initial setup pulse circuit 27, the output connected to the input of the OR circuit 21 and the installation inputs of the initial state of the counter 17 time intervals, the counter of 22 channels, the frequency divider 15 and the second frequency divider 16 connected in series to the interfacing unit 28 and digital printing mechanism 29, while the output of the block 11 counters A time counter 17 and a channel counter 22 are connected to the information inputs of the interface unit 28 and the decoder 12, and the output of the comparison circuit 18 is connected to the input of the peak detector 7 at the zero, the second input of the AND circuit 10 and the control input of the block 28 Definition voltage.

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The device works as follows.

The initial setup pulse circuit 27 produces at its output a potential of the initial setup voltage supplied to the setup inputs to the initial condition of the frequency divider 15, the second frequency divider 16, the time counter 17, the counter of 22 channels and through the OR 21 circuit to the initial setup input of the unit 11 meters, due to which the device is prepared for operation. Next, the electrical signal of the vibration transducers 1, fixed on the housings of the monitored bearings, through the switch 2 is fed to the input of the preamplifier 3, is amplified in the latter, autonormalized by the value of the root mean square or absolute value in the auto normalization unit 4, filter 5 higher frequencies, amplified in the region of higher frequencies for a given dependence in block 6 of the frequency response and fed to the input peak About the detector 7. The latter detects an extremum of the input signal at its output, which corresponds to the maximum damage depth in the monitored roller bearing. Next, the converter 8 with an external regulator 9 converts the extremum of the signal of the vibration transducers 1 into a predetermined frequency of pulses, which, through the AND 10 circuit, enter the block 11 of the counters. In this case, the reference frequency generator 14 generates a reference frequency pulse, which are divided in frequency divider 15 and second frequency divider 16. From the output of the latter, the pulses of the reference frequency generator 14 enter the counter 17 time intervals, where the input pulses are counted, From the output of the counter 17, voltage codes on the number of pulses go to the comparison circuit 18 with the measurement time switch 19. The comparison circuit B, depending on the state of the measurement time switch 19, generates pulses for setting the peak detector 7 to zero, arriving at its input, the counting impulse impulse of the transducer 8, which goes to the second input of the circuit 10, the pulse of the initial installation of the meter block 11 arriving at one-oscillator 20 and through the OR 21 circuit — to the initial installation of the block of 11 meters, the starting pulse of the MTC 29 arriving at the control input of the interface block 28, and the switching pulse of the counter of 22 channels arriving at its input, thereby synchronizing the operation of the blocks of the device. In this case, the block 11 of the counters counts the input pulses for a specified time interval. As a result, a voltage code is formed at the output of the meter unit 11, which is proportional to the depth of damage in the controlled bearing. The voltage of the block of the meter unit 11 through the decoder 12 is supplied to the indicator 13 and the information input of the interface unit 28. At the same time, the voltage pulses from the output of the comparison circuit 18 are fed to the input of the counter 22 channels with a switch 23 of the number of working channels. From the output of the 22 channel counter, the voltage codes go through the second decoder 24 to the control input of the switch 2, thereby selecting a given vibration converter, and the information inputs of the interfacing unit 28 and the decoder 12 transmitting the number information of the roller bearing being monitored. The voltage codes from the output of the counter 17 time intervals are received at the information inputs of the decoder 12 and the interface unit 28, transmitting information about the measurement time to the indicator 13 in the MTP 29. Next, the interface unit converts the input voltage codes into potentials compatible with The input voltage levels of the CPU 29, and the decoder 12 converts the input voltage codes into potentials compatible with the input voltage levels of the indicator 13. The result of the indicator 13 displays the number of the rolling bearing being monitored, measurement and the magnitude of the vibration parameter to be monitored, by which the condition of the bearings is judged. MTC 29

records on the listing the measurement time, the number of the rolling bearing being monitored, and the value of the vibration vibration 1 monitored parameter monitored.

Next, the calibration signal switch 26 is transferred to the second

0 state. In this case, the voltage pulses from the output of the frequency divider 15 pass through the pulse shaper 25, where they are formed to the specified duty cycle,

5 and the calibration signal switch 26 to the second input of the switch 2. From the last output, voltage pulses of a given duty cycle pass through the preamplifier.3, autonorating unit 4, filter 5, higher frequencies, frequency response unit 6 to the input of the peak detector 7. From the peak output the detector 7, the voltage pulses

5 to the input of the converter 8. At the same time, due to the external regulator 9, the specified frequency of conversion of the input voltage to the conversion of 0 is achieved

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hanger 8, thereby ensuring calibration of the device, i.e. obtaining monotony of vibration vibration registering parameter 1.

The proposed device allows monitoring the condition of rolling bearings with different measuring time and the number of units to be measured, which will reduce the time needed to control the changing volume of a product group by 25-30% and increase the control accuracy by choosing the optimal measurement time. one bearing unit for 15-20%.

Claims (1)

Invention Formula A device for monitoring the state of the rolling friction units containing serially connected vibration transducers, a switch, a preamplifier, an autonorm unit, a high-pass filter, a frequency response unit, a peak detector, a voltage-frequency converter with an external regulator, circuit I, the counter unit, the first decoder and indicator, reference frequency generator and first | frequency divider, about tl and - it is often caused by the fact that, in order to improve the quality of control of rolling bearing conditions by expanding the functional capabilities, it is equipped with series-connected to the output of the first divide n frequency by second divider frequency, time interval counter, DIAGRAM comparison with the measurement time switch, one-shot and DIAGRAM OR, output connected to the initial setup input & while the counters, it is also provided between you | the reference circuit code and the control switch | and successively connected with the switch channel counter number rabotago- crate channels and a second decoder, connected in series with the first frequency divider vyho, formyl Pulse duty cycle and calibration signal switch, output connected to the second input of the switch, initial setup pulse circuit, output connected to the second input of the OR circuit and installation inputs to the initial state of the time interval counter, channel counter, first frequency divider and second frequency divider, sequentially connected by a mating unit and a digital printing mechanism, while the outputs of the block of counters, time counter and channel counter are connected to the information and inputs cxerfti of the interface and the first decoder, and the output of the comparison circuit is connected to the input of the zero detector peak setting, the second input of the AND circuit, and the control input of the interface circuit.