SU845017A1 - Device for diagnosis of mechanism bearings - Google Patents

Description

The invention relates to a measuring technique and can be used in instrument engineering and in mechanical engineering for diagnosing the measurement of the spectral vibration of an object. A device for diagnosing mechanical supports is known, which contains successively connected vibrating transducer, amplifier, switch, multiplier, accumulator, key, digital device and software block that controls the input of the switch connected to the first output of program block D. The disadvantage of this device is the impossibility determining in time the spectrum of its own vibration due to a flaw in the structure of the functional system. The aim of the invention is to provide an opportunity to determine. the time of the spectrum of its own vibration. This goal is achieved by the fact that the device is equipped with a matrix decoder and serially connected with an additional vibration sensor, a transformer. and a second amplifier} two circuits, each of which includes parallel-arranged, series-connected filters and scale units; adders; the outputs of the scale blocks of both circuits are connected to the inputs of the corresponding adders, the outputs of which are connected to the inputs of the Switch; the integrator; the first decoder is connected to the input of a digital converter through a series-connected multiplier, accumulation unit, integrator, a generator of weights, the first input of which is connected to the second input of the program block, the second input to the output of the generator connected to the second input matrix decoder, the output of the block of weights is connected to the second input of the multiplier, the second output of the generator is connected to the second key input, and the input of the matrix decoder inen with switch output. The drawing shows a block diagram of a device for diagnosing supports of mechanisms. The device contains a series-connected vibration sensor 1, amplifier 2, switch S, multiplier 4 accumulation unit 5, key 6, digitizer 7, and program block 8; the control input of the switch 3 is connected to the first output of the program block 8; matrix decoder 9 and series-connected additional vibration sensor 10 and the second amplifier 11; two circuits, each of which includes parallel-arranged, successively connected filters 12–15 and large-scale blocks 16–19} of dimensions. 20 and 21; the outputs of the scale blocks, 16-19 both circuits are connected to the inputs of the corresponding adders

20 and 21, the outputs of which are connected to the inputs of cohmutator 3; the integrator 22, the matrix decoder, the first output connected to the input of the digital converter 7 through the sequentially switched driver 4, the accumulation unit 5, the key 6 and the integrator 22; generator 23; the weight coefficient unit 24, the first input of which is connected to the second output of the program block 8, the second input - to the output of the generator 23 connected to the second input of the matrix 1; about the decoder 9; the output of the weight coefficient 24 is connected to the second input of the multiplier 4, and the second output of the generator 23 is connected to the second input of the key 6,

and the input of the matrix decoder 9 is connected to the output of the switch 3,

A device for diagnosing the supports of the mechanisms works as follows.

Signals from vibration sensors 1 and 10 through amplifiers 2 and 11 are fed to filters 12-15, respectively. From the outputs of the filters through the scale blocks 16, 19 and the corresponding adders 20 and

The signal goes to the inputs of the switch 3 controlled by the software block 8. From the switch 3, the signal goes to the matrix decoder 9, which converts the signal fio to a specific algorithm constant for the type of diagnostic objects. The matrix decoder 9 controls the oscillator 23. The signals from the output of the di-diffractor 9 are multiplied

in the multiplier 4, the weighting factors, given out by the unit 24, which are set by the progressive unit 8 and the pulse sequence, are received from the generator output 23. From the output of the multiplier 4, signals characterizing the rate of change of the vibration amplitude over time and a narrow frequency range go to block 5, accumulation. After accumulating the information in this block for a time sufficient for sequential conversion by the matrix decoder 9 and multiplier 4 signals, coming from any number of filters, key 6 is opened by the signal of generator 23. Next the signal goes to integrator 22, in which a signal is generated The goal is to determine the magnitude of the change in the amplitude of vibration over time in the frequency range considered. The magnitude of this signal is recorded on a digital converter 7-

The main advantage of the invention is the ability to determine the time variation of the natural vibration spectrum, which makes it possible to predict the resource life of the object.

Claims (1)

1. USSR Author's Certificate in Application 2472914 / 25-27, cl. G 01 H 11/00, 1977 prototype)