Device for vibro-acoustic diagnostics of cyclically functioning objects

FIELD: engineering of equipment for diagnosing objects having repeated functioning cycles.

SUBSTANCE: device for vibro-acoustic diagnostics of cyclically functioning objects includes one or several channels for selection of measuring information, each one of which contains a route for controlling vibro-acoustic signal, a route for controlling rotation frequency, a route for generation of electric signal; controller; programmable computing device; indicator and registration device. Introduced additionally into each channel for selection of additional information of device is a route for measuring noise of functionally complete and spatially located in one place section of blocks of object being controlled, while route for generation of electric signal is supplemented with noncontact commutator and adjustable digital filter. Proposed system is also supplemented with predicting device.

EFFECT: increased speed and objectivity of diagnostics results, expanded functions of dev and more in-depth analysis of diagnostics parameters.

3 dwg

 

The invention relates to measuring equipment, mainly to the field of diagnostic facilities, with repeated cycles of operation, such as rotation, including gearing, working with dynamic changing moments of loading and speeds, as well as robotic tools cyclic actions.

A device for diagnosing gearing (a utility model certificate EN 20964, CL G 01 N 17/00, publ. 2001), including one or more channels allocation measurement information containing the path control vibroacoustic signal consisting of series-connected primary Converter vibroacoustic signal, the first regulated amplifier, an adjustable bandpass filter and the first analog-to-digital Converter, channel speed control, consisting of series-connected speed sensor, the second adjustable amplifier and the second analog-to-digital Converter, and a controller; a programmable calculator; indicator and recording device, the respective inputs of which are connected with the corresponding outputs programmable calculator.

The device is focused on the analysis of vibro-acoustic characteristics of the gearing mainly in bench trials and is in operation on the stationary modes of the object being diagnosed. When it is used to diagnose gearing, working with dynamically changing moments of loading and speeds, advanced analysis of control parameters on the basis of their scanning narrowband filters with different bandwidth has been limited because of the rather long duration of this process at a very rapid changes in modes of operation of the object being diagnosed, which reduces the reliability of the results and the efficiency of diagnosis.

There is also known a method of diagnosing objects and device for its implementation (Description of the patent RU № 2239869, G 07 C 11/00, publ. 2004). The essence of the proposed method lies in the fact that they perform the control parameter values of the technical condition and generate an optimal sequence of search failure, and consistently perform multiple control values of the signal parameters of the technical condition and form a mathematical predictive model of signal change of the controlled parameters, the obtained models evaluate the values of the signals monitored parameters on the depth of the forecast equal to the minimum signal difference between the signals respectively of the resource and experience elements of the system, and if p is Eisenia one signal valid values form signals, proportional to the value of the probability of failure-free operation of the elements of the system to a point in time equal to the depth of the forecast, and the signal values of the probability of failure-free work form the optimal search sequence failure object.

To implement the described method uses a device for diagnosing object, consisting of a block totals, unit conversion and storage of values of monitored parameters the state of the object, block, key, item, OR containing, in addition, the registration unit of time groundwork functional blocks of the controlled object, the block set times of resource functional blocks clock generator pulses, the power set repetition period of the clock pulses, the two elements of the time-delay element selecting the minimum value of the difference of resource and expertise, the block prediction state parameters, the computing unit time of the forecast calculation module current times groundwork, the block determining the output of the controlled parameters value and unit for computing the probability of failure-free operation of functional blocks of the test object.

The main disadvantage of this device is the absence of the measuring system, i.e. the set of sensors that characterize the diagnostic object.

Known is the most similar in essence to the present invention is a device for vibroacoustic diagnostics of gearing (the Description of the patent RU № 2224223, CL G 01 N 17/00, publ. 2004), including at least one selection channel measurement information containing the measuring path control vibroacoustic signal consisting of a series-connected first Converter vibroacoustic signal, the first regulated amplifier, an adjustable bandpass filter and the first analog-to-digital Converter, channel speed control, consisting of series-connected speed sensor, the second adjustable amplifier and the second analog-to-digital Converter, a path forming an electrical signal consisting of a digital to analogue Converter, software-controlled selective filter based on resonant circuits and the third adjustable amplifier, and a controller; computer software; indicator and recording device corresponding inputs of which are connected with the corresponding outputs programmable calculator.

The device is focused on the analysis of vibro-acoustic characteristics of the gearing mainly during benchmark testing, the diagnosis of gearing, working with dynamic changing moments of loading and speeds, is highly specialized, complex design (has several similar blocks) and not deeply is nelisiwe the information.

Object of the invention is to increase the efficiency and objectivity of the results of diagnostics cyclically operating facilities, expansion of functions of the device and deepening the analysis of the parameters of the diagnosis.

The solution of this problem is achieved in that in a device for vibroacoustic diagnostics cyclically operating objects, including at least one selection channel measurement information containing the measuring path control vibroacoustic signal, consisting of serially connected vibration sensor and the first adjustable amplifier, measuring the tract of speed control, consisting of series-connected speed sensor and the second adjustable amplifier, a path forming an electrical signal consisting of a digital to analogue Converter, software-controlled selective filter based on resonant circuits, the third adjustable amplifier and controller; computer software; indicator and recording device, the inputs of which connected with the corresponding outputs of the programmable calculator according to the technical solution in each selection channel measurement information additional path control audible noise object that includes the sensor noise and the fourth p is guirey amplifier, the first input of the fourth controllable amplifier connected to the first output of the sensor noise, and its second input is connected with the controller, the first output of the fourth controllable amplifier connected to the third input of the switch, the first input of which is connected with the first output of the first adjustable amplifier channel vibration sensor, a second input switch connected to the first output of the second adjustable amplifier channel speed sensor, the fourth input of the latter is connected to the controller, the first output switch connected to the first input of the adjustable digital filter, a second input connected to the first output of the third adjustable amplifier, and its third input is connected to the sixth output controller the first output of the adjustable digital filter connected to the second input of the controller. Switch and adjustable digital filter are common devices for circuits of three sensors, the selection channel measurement information. According to the technical solution implemented prediction device, the first input connected to the first output of the first adjustable amplifier, the second input is connected to the first output of the second adjustable amplifier, the third input is connected to the first output of the fourth adjustable amplifier, the fourth, fifth and sixth inputs are connected to respective is on the ninth, the tenth and eleventh outputs of the controller, and the first output prediction device is connected to the third input of the controller.

Improving the efficiency of diagnosis cyclically operating objects is achieved by introducing in the selection channel measurement data path noise measurement object, which allows you to obtain the prior consolidation information about the technical status of all blocks of the diagnosed part of the object, such as robotic systems, the magnitude of the background (sound) noise all operating units.

Introduction to the selection channel measurement information of the contactless switch allows you to simplify the proposed device and to remove from each channel of the at least two analog-to-digital Converter and one adjustable bandpass filter.

Replacement adjustable bandpass filter and an analog-to-digital Converter (ADC) one adjustable digital filter will increase the accuracy of the information processing and the performance of the proposed device diagnostics. And the introduction of a prediction device allows to generate signals proportional to the probability of non-failure operation of each block of the object being diagnosed, and to build an optimal graph diagnostic blocks of the object.

The essence of pre the proposed device in the form of a functional diagram shown in figure 1, figure 2 presents a functional diagram of the adjustable digital filter in figure 3 - functional diagram of a prediction device.

The device vibroacoustic diagnostics cyclically operating objects contains:

1 - selection channel measurement information about vibroacoustic parameters, sound noise and speed;

2 - programmable calculator;

3 - recording device;

4 - indicator;

5 - prediction unit;

6 is a vibration sensor;

7 - the first adjustable amplifier;

8 - speed sensor;

9 - the second adjustable amplifier;

10 - sensor noise;

11 - fourth adjustable amplifier;

12 - switch;

13 - adjustable digital filter;

14 - analog Converter;

15 - software-controlled selective filter;

16 - third adjustable amplifier;

17 controller;

18 - shaper of quadratures;

19 - analog-to-digital Converter;

20 - arithmetic unit;

21 - random access memory;

22 is a permanent storage device;

23 - unit recording times developments;

24 - block set times of the resource.

25 is a generator of clock pulses;

the 26 - block set repetition period of the clock pulses;

27 is a block summation;

28 - the first element of the delay time is Yeni;

29 - unit conversion and storage state parameters of interest;

30 - picker minimum difference;

31 - block prediction parameters the state of the object;

the 32 - unit computation time of the forecast;

33 - the second element of the delay time;

34 - unit calculation of current times developments;

35 - yulok control state parameters of interest;

36 is a block key;

the 37 - element, OR;

38 - unit calculation of probabilities.

The device (1) consists of a selection channel measurement information 1, the programmable transmitter 2, the recording device 3, the inlet of which is connected with the first output of the programmable transmitter 2, indicator 4, the inlet of which is connected with the second output of the programmable transmitter 2 and a prediction device 5, the first input connected to the first output of the first adjustable amplifier 7, the second input is connected to the first output of the second adjustable amplifier 9, the third input is connected to the first output of the fourth adjustable amplifier 11, the fourth, fifth and sixth of its inputs connected respectively with the ninth, tenth and eleventh outputs of the controller 17 and the first output prediction device 5 is connected to the third input of the controller 17.

The selection channel measurement information 1 includes:

measuring path control vibroacoustics the wow signal, consisting of series-connected to the vibration sensor 6 and the first adjustable amplifier 7, the first input of which is connected with the output of the vibration sensor 6 and the first output to the first input of the proximity switch 12;

- measuring circuit for the speed control, consisting of series-connected speed sensor 8 and the second adjustable amplifier 9, the first input of which is connected with the output speed sensor 8, and the first outlet connected to the second input of the switch 12;

measuring path for noise control is functionally complete and spatially located in one place part of the blocks of the test object consisting of series-connected sensor noise (measurement microphone 10 and the fourth adjustable amplifier 11, the first input of which is connected with the output of the sensor noise 10 and the first output is connected with the third input of the switch 12;

- path forming an electrical signal comprising a proximity switch 12, the first three inputs of which are connected with the corresponding outputs of the adjustable amplifiers measuring paths, adjustable digital filter 13, the first input of which is connected with the output switch 12, a digital-to-analogue Converter (DAC) 14, an input and first output are connected to the corresponding third output and the first input programs the alignment of the transmitter 2, software-controlled selective filter based on the resonant circuits 15, the first input of which is connected with the second output of the DAC 14, the third adjustable amplifier 16, the first input of which is connected with the third output of the DAC 14, the second input of the third controllable amplifier 16 is connected with the output of software-controlled selective filter based on the resonant circuits 15, the first output of the third controllable amplifier 16 is connected with the second input of the adjustable digital filter 13;

controller 17, the first input and first output of which is connected with the corresponding fourth output and the second input of the programmable transmitter 2, the second input of the controller 17 is connected with the first output of the adjustable digital filter 13, the third input is connected with the first output prediction device 5, the second output controller 17 is connected with the second input of the first adjustable amplifier 7, the third output of the controller 17 is connected with the second input of the second adjustable amplifier 9, the fourth output of the controller 17 is connected with the third input of the third controllable amplifier 16, the fifth output of the controller 17 is connected with the second input of the fourth adjustable amplifier 11, the sixth input the controller 17 is connected with the third input of the adjustable digital filter 13, the seventh output of the controller 17 is connected with the second input of software-controlled selective filter is based on the resonant circuits 15, the eighth output of the controller 17 is connected with the fourth input of the switch 12, the ninth, tenth and eleventh outputs of the controller 17 are connected respectively with the fourth, fifth and sixth inputs of the prediction device 5.

Adjustable digital filter 13 (figure 2) consists of a shaper of quadratures 18, the first input connected to the first output of the switch 12, the second input is connected to the first output of the third controllable amplifier 16, and the third input is connected to the sixth output controller 17; analog-to-digital Converter (ADC) 19 first input connected to the first output of the shaper of quadratures 18; arithmetic unit (AU) 20, a first input connected to the first output of the ADC 19 and its second input is connected to the first output of the permanent memory (ROM) 22; random access memory (RAM) 21, a first input connected to the first output AU 20, and the first output is connected to the second input of the controller 17.

A prediction unit 5 (figure 3) contains the block 23 registration times operating time tIR(i=1, ..., k) of the functional blocks of the controlled object to the time the next turn on the device and the controlled object, block 24 set times of resource tpi(i=1, ..., k) of functional blocks, the clock 25 with a repetition period T and duty cycle ≪1, b is OK 26 set repetition period of the clock pulses T, the summation block 27, the first delay element at time T 28, block 29 conversion and storage of the n values of each of m of the controlled parameters of the state of the object, the element 30 selecting the minimum value of the difference between the resource and expertise of the k values, the block 31 forecasting state parameters, the unit 32 to calculate the time of the forecast, the second delay element 33 at time nT, block 34 computing the current time of the operating time tIR(i=1, ..., k), the block 35 determining the output m of the controlled parameters for valid values over time of the forecast tnblock keys 36, item, OR 37 with m inputs and the block 38 calculation of probability of failure-free operation n functional blocks of the test object.

The principle of operation and communication between these blocks is described in the patent RU 2239869, CL G 07 C 11/00, published. 2004.11.10. The differences between the known and proposed prediction devices is that potentiometric sensors with manual setting times operating time tIRand times of resource tpifunctional blocks of the controlled object to a known device (blocks 1 and 2) is replaced by operational amplifiers operated in automatic mode, the controller 17 of the proposed prediction device (blocks 23 and 24). This introduced an additional connection between them (see figure 3). Information about the current operating time function is blocs controlled object t iremoved from the output unit 34, is processed and stored controller 17. In addition, the controller 17 controls the operation of all units offer a prediction device 5, by adjusting the repetition period of the clock pulses (block 26).

The proposed device (1) can be provided with one, two or more channels allocation measurement data are identical to channel 1.

The device operates as follows :

When the diagnosis of cyclically operating objects, working with dynamically changing modes, electric analog signal produced within the minimum possible time interval (time 2-3 revolutions of the output shaft) of the vibration sensor 6, which depth controls the individual mechanism of the object enters the first adjustable amplifier 7, which is amplified to a specified level (the determination of the desired level of amplification is carried out using a programmable calculator 2), via a proximity switch 12 controlled by the controller 17, filtered regulated (controller 17) digital filter 13, the configured bandwidth covering the entire possible Δƒ1the range of the most informative frequency diagnosing ƒmin1≤Δƒ1≤ƒmax1where

ƒmin1- naimenee is of informative frequencies for diagnosis of vibration;

ƒmax1- most of the informative frequencies for diagnosis of vibrations.

Then the signal is transmitted to the controller 17, where through the corresponding interface unit (not shown) enters the programmable transmitter 2, which is formed in the form of a data file with reference to the real time scale.

In the next moment of time (2-3 revolutions of the output shaft) in the measuring path of the speed control with speed sensor 8 analog electric signal is supplied to the second adjustable amplifier 9, where it is amplified to a specified level and through the switch 12 and the filter 13 is converted into a digital form is transmitted to the controller 17, and through him to a programmable transmitter 2, which is formed in the form of a data file.

In the next moment of time (2 to 3 revolutions of the output shaft) in the measuring path noise control object with sensor noise 10, which controls the operation of a functionally complete and spatially located in one place part of the blocks of the controlled object, the analog electric signal is supplied to the fourth adjustable amplifier 11, which is amplified to a specified level (the determination of the desired level of amplification is carried out using a programmable calculator 2), is transmitted through the switch 12, filtered regulated(controller 17) digital filter 13, configured bandwidth covering the entire possible Δƒ2the range of the most informative frequency diagnosing ƒmin2≤Δƒ2≤ƒmax2where

ƒmin2- the least of informative frequencies diagnosis for noise;

ƒmax2- most of the informative frequencies diagnosis for noise object.

Is then transmitted to the controller 17, where through the corresponding interface unit (not shown) is fed into a programmable calculator, where is in the form of a data file with reference to the real time scale.

Using the controller 17 controls the process of data acquisition and conversion processing of diagnostic data.

After formation of source file data start its processing and early analyze the signals of the sensor noise of the object. If the signal to noise diagnosed of the object does not exceed acceptable, then proceed to an in-depth diagnosing of the proposed mechanism of the object using a vibration sensor, otherwise find out the cause of the noise, find a noisy engine and in-depth diagnostics start with this mechanism.

In-depth diagnosis is performed in the following sequence. Using tract of forming an electrical signal from programmare the CSOs evaluator 2 vibro-acoustic source signal, recorded in digital form on a programmable calculator 2, is fed to the DAC 14 and through control from a programmable transmitter 2 is converted into an electrical analog signal which is amplified third adjustable amplifier 16 is filtered by the digital filter 13, rebuilt by the controller 17 and the programmable transmitter 2 on the required bandwidth, allowing to allocate the necessary informative component of the spectrum. Filtered by the filter 13 is converted into a digital form, the signal is transmitted to the controller 17 and through him to a programmable transmitter 2, which is fixed in the form of a data file with time implementation of the considered process in a given bandwidth.

If necessary, the source of vibroacoustic signal is repeatedly reproduced programmable transmitter 2 and the DAC 14, is amplified by a third amplifier 16 and is filtered by an adjustable digital filter 13, which ensures its scanning frequency filtering with different bandwidth without any restrictions on time and on identical modes of operation of the object being diagnosed, which significantly extends the capabilities of analysis.

Given the complexity of the selection "weak" amplitude, but informative from the standpoint of diagnosis frequency signal IP is resultsa software-controlled selective filter based on the resonant circuits 15, which allows for control from a programmable transmitter 2 through the controller 17 to configure a resonant circuit at the desired specific frequency ƒ0to distinguish it from the total spectrum, to strengthen the third amplifier 16, to convert to digital form the filter 13 through the controller 17 to transfer to a programmable transmitter 2 with the formation of its data file with time implementation of fluctuations in the analyzed frequency. It also extends the analysis of diagnosed signal.

In General, the analysis of diagnostic data is carried out taking into account the actual time scale and rotational mechanisms diagnosed object.

When identifying in the process of analyzing the diagnostic data necessary changes to the algorithm processing the original signal using the proposed device allows you to do this without re-reading of the controlled parameters.

After complex processing of diagnostic information in the programmable transmitter 2, it is presented in a user-friendly form on the display 4, and is recorded in the recording device 3.

Adjustable digital filter 13 operates as follows.

Analog input signal at the primary entry programmable transmitter 2 is fed from the switch 12 via the first input of the shaper to the square of the (FC) 18. In-depth diagnosis of the current block object analog signal is returned to FC 18 with the third controllable amplifier 16 through the second entrance. Work FC 18 controlled by the controller 17 by changing the reference frequency pulses, which are fed to the input of the three FC 18.

According to specified rules using the ADC 19 analog signal is converted to digital and processed by an arithmetic unit (AU) 20. The processing results are temporarily stored in random access memory device (RAM) 21 and analyzed by controller 17. The program of the arithmetic unit is stored in the ROM of the ROM 22.

A prediction device 5 operates as follows.

Let the time resource of the i-th functional block of the object is tpi(i=1, ..., k), and the time between the moment of its regular on - tIR(t=1, ..., k). Before switching on the device, these settings are set via the controller 17 in block 23 of the job times the operating time tIR(i=1, ..., k) of the functional blocks of the controlled object to the time the next turn on the device and on the block 24 set times of resource tpi(i=1, ..., k) of the functional blocks of the controlled object to the time the next turn on the device, respectively.

Involvement of a prediction device 5 Khujand is realized by the team, supplied from the controller 17 to the block set repetition period of the clock pulses (block 26) proposed a prediction device.

The principle of operation and communication between blocks of a prediction device 5 described in the patent RU № 2239869, CL G 07 C 11/00, published. 2004.11.10.

The inverse relationship between prediction device 5 and the selection channel measurement information 1 is carried out by passing a current time developments of functional blocks of the test object titaken from the outputs of the block 34 to the third input of the controller 17, where they are processed and stored.

The recording unit of time of the operating time tIR(i=1, ..., k) 23 functional blocks of the controlled object to the time the next turn on the device and block set times of resource tpi(i=1, ..., k) 24 functional blocks of the controlled object to the time the next turn on the device (figure 3) contain k knobs times operating time tIR(i=1, ..., k) and time resource tpi(i=1, ..., k), respectively. These knobs are implemented using operational amplifiers, controlled from the controller 17 (see Handbook of electronics in three volumes. Under the General editorship of Prof. technology. Sciences Was, Volume 3, "Energy" of 1970, str-286).

Thus, the use of the proposed device, the additional tract noise measurement allows the rational in order to organize the work on diagnosis of blocks of the object and increase its effectiveness. Introduction to the selection channel measurement information of the contactless switch allows you to reduce the number of identical blocks paths of the channel and thereby to simplify their design. Replacement adjustable bandpass filter and an analog-to-digital Converter on an adjustable digital filter can improve performance and increase the accuracy of the information processing. The use of a prediction device significantly increases the depth of analysis of the diagnostic information. Together, these features lead to improved effectiveness and objectivity of the diagnosis of complex technical systems.

The device vibroacoustic diagnostics cyclically operating objects, including one or more channels allocation measurement data, each of which contains the measuring path control vibroacoustic signal, consisting of serially connected vibration sensor and the first adjustable amplifier, a tract of speed control, consisting of series-connected speed sensor and the second adjustable amplifier, part of tract of forming an electrical signal, including a digital to analog Converter, software-controlled selective filter based on resonant circuits, the third adjustable amplifier and counter ller, programmable transmitter, indicator and recording device, the inputs of which are connected with the corresponding outputs of the programmable transmitter, characterized in that it contains a prediction unit, unit conversion and storage of the values of each of the controlled parameters of the state of the object which are connected with the corresponding outputs of circuits controlled parameters, the inputs of the registration unit of time functional blocks of the controlled object to the time on the device and the controlled object connected to respective outputs of the controller unit set times of resource functional blocks of the controlled object connected to respective outputs of the controller, the input unit of the set repetition period of the clock pulses is connected with the corresponding output of the controller, and the outputs of the computing unit current time developments of functional blocks of the controlled object connected to respective inputs of the controller, and each selection channel measurement information introduced an additional tract of measurement noise functionally complete and spatially located in one place part of the blocks of the test object consisting of series-connected sensor noise and fourth adjustable amplifier, and the tract is formirovaniya electrical signal supplemented contactless switch and adjustable digital filter, when this switch their inputs connected to the outputs of path control vibroacoustic signal path control speed, highway noise measurement part of the blocks of the object and the corresponding output controller, the output switch is connected to the first input of the adjustable digital filter, the second filter input connected with the output of the third adjustable amplifier, and the third input is connected with the corresponding output controller, the output of the adjustable digital filter associated with the second input of the controller.



 

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1 dwg

FIELD: testing engineering.

SUBSTANCE: bench comprises base, driving shaft mounted on the base for permitting rotation, clutch connected with the driving shaft, mechanism for clutch engagement and disengagement, and control desk. The driving shaft is composed of at least two members. One member can be connected with the driving shaft of the electric drive to be tested and is provided with clutch member rigidly connected with its free end, drum with slots uniformly arranged over periphery along the generatrices and mounted on the intermediate section of the shaft, and inductive contactless switch which is mounted on the base near the drum at the level of slots and whose output is connected with the control desk. The other member of the driving shaft provided with the other clutch member kinematically connected with the mechanism for clutch engagement and disengagement is provided with a single-arm lever whose one end is rigidly connected with the shaft member for permitting rotation together with it and co-operation with the force pickup with its free end.

EFFECT: simplified design and expanded functional capabilities of the bench.

1 dwg

FIELD: testing engineering.

SUBSTANCE: method comprises determining initial rate of impact from preliminary deviation of rotatable traverse from vertical. When the rotatable traverse is in vertical position, the axis of rotation of the rotatable traverse, axis of the gearing wheel secured to the unmovable end of the rotatable traverse, and gearing wheel secured to the housing are vertically aligned. In so doing, the sides of the wheel teeth engage the gearing. The initial rate of impact is determined from the formula proposed.

EFFECT: enhanced reliability of investigating.

1 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to design of test stands and it can be used for testing coaxial reduction gears in closed circuit. Proposed stand contains drive motor 3 and two coaxially installed reduction gears 1 and 2. Hollow output shafts 7 and 8 are interconnected by flexible coupling 9. Input shafts 4 and 5 arranged inside hollow shafts are connected by coupling 6. Housing of reduction gear 1 is installed stationarily on frame 10of stand, and housing of reduction gear 2 is installed in process support 11 secured on frame 1 for turning through preset angle relative to housing of reduction gear 1. Worm self-braking pair 12 is installed in support 11 to turn housing of reduction gear 2 through preset angle and fixing it in position. Worm wheel of pair can be made in form of sector secured by screws on housing of reduction gear 2. Any mechanical or hydraulic device installed on process support can be used instead of worm pair.

EFFECT: improved testing.

2 dwg

FIELD: testing engineering.

SUBSTANCE: method comprises exciting forced oscillations in the article, changing the frequency of forced oscillations until resonance oscillations occur, measuring parameters, and determining the duration of service life from the correlation dependence for a given type of article. Before exciting oscillations, the article is insulated from the exciting system. During the resonance oscillations the potential difference of static electricity between the article surface and ground is measured.

EFFECT: enhanced reliability of testing.

1 dwg

FIELD: the invention may be used on railway transport for diagnostics of bearings of different rotor mechanism changing while working orientation in space.

SUBSTANCE: the essence of the invention is in systematization of information about vibrations in different positions of a rotor mechanism and its displacement to a chosen position. The measuring device has an identifier of minimum information incoming from vibration detectors, a tilt manipulator and an automatic multi-channel scheme of measuring and controlling of the tilt manipulator. On the tilt manipulator a rotor mechanism is fixed. The measuring device allows to determine the characteristic of a magnitude of vibrations bringing by the tilt of an axis of rotating or by defects at changing orientation of the rotor mechanism.

EFFECT: defined characteristic of the magnitude of vibrations is used for making choice of a position enabling least resistance to rotation of a rotor mechanism or having least vibrations deflection of norm.

5 cl, 1 dwg

FIELD: the invention refers to testing technique.

SUBSTANCE: the test bench has a drive , input shafts for connecting with tested transmissions, output shafts, a loader and a locking device. The test bench has two tested transmissions and the locking device is fulfilled in the shape of gearings firmly connected between themselves and having equal gearing ratio with tested gearings and installed on the input parallel shafts of tested gearings. A calibrated dynamometer clutch connecting two output shafts of tested gearings. serves as a loader.

EFFECT: the invention simplifies and increases productivity of testing.

3 dwg

FIELD: test equipment.

SUBSTANCE: torsion and loading moments are applied to shafts of reducer to be tested. Loading moment of electric engine at input of reducer is calculated automatically on the base of values of electric parameters of electric engine, which drives reducer into motion. Loading moment of generator at output of reducer is calculated automatically from values of electric parameters of generator connected with output shaft of reducer to be tested. Efficiency of reducer is calculated automatically as loading moment of generator relatively loading moment of electric engine. Digital values of loading moment of electric engine and efficiency of reducer are displayed onto monitor periodically. Values of loading moment of electric engine and efficiency of reducer are memorized to get access to subsequent reading mentioned values out. Total number of cycles of measurement and number of cycle of corresponding measurement is specified. Values of loading moment of electric engine and efficiency of reducer are pt into memory during 8192 cycles. Technical condition of reducer is estimated by due to comparing read out data with reference data.

EFFECT: improved efficiency of test.

2 dwg

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