SU729482A1 - Device for diagnosis of service lofe of mechanisms and machines - Google Patents

Description

one

This invention relates to endurance testing of structures.

A device is known for diagnosing resuction of parts of mechanisms and machines, comprising a converter, an information collection unit, a recording unit and control mechanisms 1 |.

It is also known a device for diagnosing the resource of parts of mechanisms and machines, comprising a serially connected converter, an information collection unit, an information processing unit, and a registering device 2.

However, the known devices do not allow a quantitative assessment of the residual life of the parts of the mechanisms and the maige, the nature of random stationary processes. .

The aim of the invention is to obtain a qualitative assessment of the residual life of parts operating under conditions of random dynamic loading.

This is achieved by the fact that the information collection unit is implemented in. as a long-term memory and a two-channel system, one of the channels of which is formed sequentially connected by a load level limiter, a time interval counter, and. an intermediate storage device, another channel is formed by an annular storage device, the channel inputs are connected to a converter, the outputs are connected to the inputs of a long-term memory device, the output of which is connected to the input of the information processing unit, and the information processing unit is implemented as an intermediate storage device, delay unit, computing device and sequentially connected random access memory, spectrum analyzer, discriminator of spectral components of the unit determination of endurance, the outputs of the discriminator of the spectral composition of the sensors and the endurance determination unit are connected to the input of the intermediate storage device, the input of the spectrum analyzer with the input of the delay unit, the outputs of the intermediate storage device of the delayed unit and the random access memory with the inputs of the computing device.

and the output of the computing device - with the input of the recording device.

The drawing shows a block diagram of the proposed device.

The device comprises a converter 1, an amplifier 2, a data collection unit and an information processing unit. The information collection unit includes a load level limiter 3, the input of which is connected to the output of amplifier 2, a counter of 4 time intervals, an input of which is connected to the output of limiter 3 of the load, an intermediate memory device 5, the input of which is connected to the output} of the counter of 4 time intervals, ring memory 6, the input of which is connected to the output, amplifier 2, coincidence circuits 7-9, two 7 and 8 of which are respectively connected to the outputs of the intermediate memory 5 and the ring memory of device 6. In addition, the collection unit contains a long-term storage device 10, the inputs of which are connected to the outputs of the circuits 7 and 8 match, and the output with the input of the circuit 9 match, the switch 11 mode change, connected to the ring storage device 6 and the circuits 7, , 8 matches; information supply switch 12 connected to coincidence circuit 9.

The information processing unit includes a memory operative device 13, the input of which is connected to the output of the coincidence circuit 9, a spectrum analyzer 14, the input of which is connected to one of the outputs of the random access memory 13, a discriminator 15 of spectral components, the input of which is connected to one of the outputs of the spectrum analyzer 14 , block 16 for determining endurance, the input of which is connected to one of the outputs of the discriminator 15, intermediate storage device 17, the outputs of which are connected to another output of the discriminator 15 spec and the output of the endurance determination unit 16, the delay unit 18, the output of which is connected to another output of the spectrum analyzer 14, the coincidence circuit 19 and 20, the inputs of one of which are connected to the input of the intermediate storage device 17 and one of the outputs of the delay block 18, and the outputs of the other with another output of the delay unit 18 and another output of the random access memory 13, In addition, the information processing unit includes a computing device 21, the input of which is connected to the outputs of the matching circuits 9 and 20 and another This is the first intermediate memory device 22, the input of which is connected to the output of the computing device 21 and the associated feedback. The device also contains a regulating device 23, the input of which is connected to the output of the intermediate storage device 22.

The device works as follows.

Dynamic loads in the form of random dynamic processes 5 (t) are sensed by converter 1 and amplified in amplifier 2 are recorded in a ring memory 6. At the same time, the continuous flow 5 (t) flows into limiter 4 of the load level, which controls the interval 5 counter. TJ time; those. all time intervals are fixed during which 5 (t) 5-1, where 5-1, is the height limit: the degree of material material of the test piece corresponding to the level of restriction. Certain time intervals are recorded by intermediate storage 5 for TJ, J 1K.

In the case of a change in the loading mode, the information through the match schemes 7 and 8 is copied to the long-term storage device 10, where it is stored permanently, and the new information enters the ring storage device 6 and the intermediate storage device 5.

The signal from the subformer switch 12 is turned on for the coincidence circuit 9 and the information is transferred from the long-term storage device 10 to the random access memory 13, after which the residual life is analyzed. To do this, the amplitude spectrum of the implementation is determined in the analyzer 14 and the discriminator 15 discriminates these spectrum components, amplitude; which exceeds the limitation level with the corresponding values of frequency 0. Then, in block 16, the determination of endurance using the selected spectral components and fatigue curves for the material of the test piece is determined 1 / Ni, where Ni is the material endurance. The latter, simultaneously with the corresponding frequencies fi, i, are recorded in the intermediate storage device 17.

After the end of the spectrum analysis, the end of the analysis signal is sent through the delay unit, and the coincidence circuits 19 and 20 are opened, and the generated arrays TJ, fi, l / FMi from the operational memory of the device 17 are copied into the computing device 21, which implements the operation

(Ut - (,..-J iN1

Claims (2)

A certain value of the residual resource through the intermediate storage device 22 enters the registering device 572 23, from the output of which the residual resource b T is counted. With further determination of the residual resource, the value from the intermediate terminal of the device 22 goes back to the parallel device 21 as the current value of the residual pecjpca 5Tn i.e. In this case, 1.4 cases 5Tn ST and a new value is defined, ie BT. and the residual life of the test part. Formulation of the Invention To diagnose pecjpca of parts of mechanicals and machines, containing a serially connected converter, an information collection unit, an information processing unit, and a recording device, characterized in that, in order to quantify the residual life of parts working in dynamic loading, the block collection information-ffl vypulnen in the form of long-term write-down of any devices and two-channel) NOY system, the channel of which is formed and successively connected by a level limiter. and, by counting time intervals and intermediate memory, another channel is formed by a ring storage device, channel inputs are connected to a converter, outputs are connected to inputs of a long-term memory device, the output of which is connected to an input of an information processing unit, and information processing unit is in the form of an intermediate storage device , delay unit, computing device and sequentially connected random access memory, spectrum analyzer, discrimination The spectral torus components and the stamina determination unit, the outputs of the discriminator of the spectral components and the offset determination unit; the intermediate storage device inputs, the spectrum analyzer output with the OUTPUT of the delay unit, the outputs of the intermediate sleeping device of the delay unit on the operative memory device with the outputs of the computing device, and the output of the computing device with the input of the resolver device. Sources of information taken into account in the examination 1. US Patent N 2965840, cl. 73-91, 1960. 2. Transmission drives of metallurgical machines, piles of VNIIMETMASH sb. .38, m.,. with. 286-288 (prototype).