SU1317534A1 - Device for diagnostic checking for production errors in collector of electric machine - Google Patents

Abstract

This invention relates to a measurement technique. The aim of the invention is to improve accuracy and speed. The device contains a vibration transducer and a recording unit. The introduction of the vibration signal processing unit, the information voltage processing unit, the comparison unit, the first input of which is connected to the input of the vibration signal processing unit, and the second input to the output of the information voltage processing unit, is the output of the comparison unit connected to the recording input. device, and the input of the processing unit of the vibration signal is connected to the outputs of the vibrator. The information voltage processing unit is provided with an input for connecting an electric machine to different types of brushes. 1 il. i SL С 00 СП 00 4 ;:

Description

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The invention relates to a measurement technique, in particular, to devices for determining technological errors in the manufacture and assembly of collectors of electrical machines.

The aim of the invention is to improve accuracy and speed.

The drawing shows a block diagram of a device for diagnosing technological errors of the collector of an electric machine.

The following designations are introduced in the drawing: electrical machine 1 is being investigated, vibration converter 2, vibration signal processing unit 3, information voltage processing unit 4, comparison unit 5, recording unit 6.

A vibrating converter 2 is attached to the case of the investigated electric machine 1 with the help of glueE1, its wax, mastic or threaded bushing. The output of the vibration transducer 2 is connected to the input of the vibration signal processing unit 3. The bipolar brushes of the electric machine under investigation are connected to the input of the information-voltage processing unit 4. The two inputs of the comparison unit 5 are connected respectively to the outputs of the vibration signal processing unit 3 and the information voltage processing unit 4. The output of the comparator unit 5 is connected to the input of the recording unit 6. The vibration converter 2 is a piezoceramic oscillation sensor, for example, a series of ICs, CDs, KVs.

The vibration signal processing unit contains a matching device, filters tuned to bearing frequencies, scaling units and detectors.

The information voltage processing unit contains an amplifier, filters tuned to the frequencies of the collector and bearings, scaling units, detectors.

The comparison unit contains subtraction schemes and an adder.

A device for diagnosing technological errors in the collector of an electrical machine works as follows:

After connecting the electric machine 1 to the power source, the vibration signal from the output of the vibration converter 2 is fed to the input

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the vibration signal processing unit 3. At the same time, the voltage from the opposite-pole brushes is fed to the input of the information processing unit 4

5 voltages From the outputs of the vibration signal processing unit 3 and the information voltage processing unit 4, the transformed signals, in the form of proportional voltages, arrive at the input of the comparison unit 5, in which the difference signal between the amplitudes of the bearing frequencies and the amplitudes of the bearing and collector frequencies is determined and 5 the amplitude of the signal that carries information about the defect of the collector. The signal from the output of the comparator unit then goes to the registering 1st unit 6. A collector defect is determined from the switch instrument of the registering unit.

The calculation of information frequency for defects of bearings and collector frequencies is carried out according to the formulas. Defect of the rotating ring K (LO -UB) + (-I) QC i + mp + to (-1) Q;

defect of non-rotating ring 0 Kcj, + (- 1) 2- Uc l nip + K + (- 1)

different sizes of balls

(piD QC, ± OC;

the protrusion of the collector plates j npcDj; the harmonic of the k-th order of deviation of the forms of the collector Kso, where CO is the angular rotation frequency of the bearing separator;

k - harmonic number; 0 Р 9 S (0, 1, 2, ...;

b, c: 2 s - the number of collector plates; CJ is the angular frequency of rotation of the collector.

 The proposed device, in comparison with the prototype, allows to increase the speed of the process of control measurements of technological errors of the collector of electrical machines, reduce the cost of bringing them, because it does not require partial dismantling of the machine, and also by analyzing the information voltage, improve the accuracy of measuring defects

 by 2.5-30%.

The proposed device, in comparison with the basic one, allows directly diagnosing the values of the corresponding reservoir defects.

with small labor costs for diagnostics.

Claims (1)

Invention Formula A device for diagnosing technological errors in the collector of an electrical machine, comprising a vibratimer and a recording unit, characterized in that, in order to improve accuracy and speed, the device is additionally equipped with a vibratory signal processing unit, information voltage processing, the comparison unit, the first input of which is connected to the output of the vibration signal processing, and the second input to the output of the information voltage processing unit, the output of the comparison unit is connected to the input of the recording unit, and the input of the vibration signal processing unit, and The information voltage processing unit is provided with an input for connecting an electric machine to different-polar brushes. Editor N.Slobod nickname Compiled by V. Volkov Tehred M. Khodanich Proofreader I. Muska Order 2428/49 Circulation 625 Subscription VShPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow Zh-35, 4/5 Raushsk nab. Production and printing company, Uzhgorod, st. Project, 4