SU1441226A1 - Transmission testing bench - Google Patents

Abstract

This invention relates to vehicle engineering and can be used to test transmissions for reliability. The purpose of the invention is to improve the accuracy of reproducing operating loading conditions. The drive motor 1 is connected to the input shaft 2 of the tested transmission 3, the output shaft of which is connected to the brake 4 with the control unit 5. There is an additional brake 7 with a control block 8, made of powder type. On the output shaft 6 of the tested transmission 3, a moment of resistance is formed, the static component of which is created by the brake 4, and the dynamic component — an additional brake 7. Separately forming the components of the load on the output shaft 6 of the tested transmission 3 ensures the creation of higher frequencies load fluctuations, which improves the accuracy of reproduction of operating loading conditions. 1 il. Iczt

Description

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The invention relates to a transport engineering and can be used to test transmissions for reliability,

The purpose of the invention is to improve the accuracy of reproducing operating loading conditions.

The drawing shows a structural scheme of the stand.

The stand contains a drive motor 1J kinematically connected to the input shaft 2 of the test transmission 3, brake 4 with the control unit 5, kinematically connected with the output shaft 6 of the test transmission and made in the form of an electric generator, an additional brake 7 made in the form of a powder brake with the unit 8 control, kinematically connected to the output shaft 6 of the test transmission and installed between it and brake 4, sensors 9, 10 torque of brake 4 and additional brake 7, transform A sensor 11 of the torque sensor signals, the first input of which is connected to the output of the sensor 9 of the torque of brake 4, the second input to the output of the sensor 10 of the torque of the additional brake 7, Stand contains a timing device 12, the first block 13 the comparison, the first input of which is connected to the first output of the driver 12, the second input to the first output of the torque sensor signal converter 11, the second block 4 of the comparison, the first input of which is connected to the second output of the sensor cool signal signal 11 the third comparison unit 15, the first input of which is connected to the first output of the converter of the 11 torque sensor signals, the second input to the second output of the driver 12, and the output to the input of the brake control unit 5, the fourth comparison block 16 whose first input connected to the output of the second comparator unit 14, the second input to the output of the first comparator unit 13 of the doubling unit 17, the input of which is connected to the first output of the converter 11 of the torque sensor signals, and the output to the second input of the second unit 14 compare. Differentiator 18, whose input is connected to you

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by the course of the fourth power supply unit 16, and the adder 19, the first input of which is connected to the output, the fourth comparison unit 16, the second input to the output of the differentiator 18, and the output to the input of the control unit 8 in addition. body brake

Transducer 11 constructively consists of two identical and independent transducers of transducer signals from sensors S that transform signals from sensors 9 and 10 that come through two measurement channels.

The proposed stand works as follows.

In accordance with the preliminarily formed reducible operation from the first output of the driver 12 to the first input of the first comparison unit 13, a signal is received that is proportional to the resistance moment generated by the additional brake 7. To the second input of the first comparison block 13, to the first input of the third block 15 Comparison of the doubling unit 17 and the signal from the first output of the converter 1 to the signal of the torque sensors, proportional to the moment of resistance of thorium 4 .. When the drive is off the zlaktrotvigygel e 1 moment of resistive braking 4 is zero. With

This signal, proportional to the moment of resistance of the additional brake 7, is outputted from the output of the first comparison unit 13 to the second input of the fourth comparison block 16. The first input of the fourth comparison unit 16 of the output of the second comparison unit 14 receives a signal, a difference of the moments of resistance of the additional brake 7 and the brake 4. The first input of the second comparison unit J4 receives a signal from the second output of the torque sensor comparison converter i1, measured by the sensor 10 cool comen g, proportional to MOMeH i OB resistance of brake 4 and additional brake 7, and, on the second input, of the second comparison unit 4, a signal comes from the block 27, equal to twice the value of the moment, 4o brake resistance As a result, at the outputs of the fourth block 16 is comparable to the adder. 19, a signal is generated equal to the moment of resistance of the additional brake 7j which is applied to

the input of the additional brake control unit 8, Next, the driving motor 1 is activated, which starts to rotate the input shaft 2 of the transmission 3 to be washed, while on the output shaft 6 by means of the additional brake 7 creates a moment of resistance equal to the specified one.

A signal proportional to the moment of resistance of the additional brake 7 from the second output of the transducer I1 of the torque sensor signals is fed to the first input of the second comparison unit 14, from the output of which the signal goes to the first input of the fourth comparison unit 16. The output signal of the fourth comparison block 16, equal to the difference between the set and the spent torque values on the output shaft 6 of the test transmission 3, is fed to the first input of the adder 19 and the input of the Differentiator 18. From the output of the differentiator 18, the signal proportional to the derivative of the fourth output signal The unit 16 is sent to the second input of the adder 19. After the actual value of the moment of resistance created by the additional brake 7 becomes equal to the specified one, the signal. at the output of the adder 19 and, accordingly, at the input of the control block 8, the additional brake will become different zero. As a result, the load on the output shaft 6 of the tested transmission 3 will be equal to the moment of resistance generated by the additional brake 7 in accordance with the signal on the first output of the driver 12, and the driving mode is simulated.

Further, in accordance with the pre-formed load mode, from the second output of the driver 12 to the second input of the third comparison unit 15, a signal is received that is proportional to the moment of brake activation 4. From the output of the third comparison unit 15, the signal goes to the input of the brake control unit 5. The output signal of the brake torque sensor 9 is fed to the first input of the converter of the 11 signals of the torque sensors, from the first output of which the signal goes to the first input of the third comparison unit 15. If the value of the signal at the output of the third block is 15

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equal to zero, the moment of resistance of the brake 4 will be equal to the specified value. The output signal of the torque sensor 10 is proportional to the sum of the resistance moments created by the additional brake 7 and brake 4, is fed to the second input of the torque sensor signals 11. From the second output of the torque sensor signal converter 11, a signal proportional to the torque measured by the torque sensor 10 is fed to the first input of the second comparison unit 14, to the second input of which a signal proportional to the moment of brake resistance 4 is received from the doubling unit 17 As a result, a signal is formed at the output of the second comparator unit, equal to the difference of the moments of resistance of the suppressed gel brake 7 and the brake 4, which is fed to the first input of the fourth 5 comparative block 16. the input of the fourth comparison unit 16 receives a signal from the output of the first unit 13 against. At the output of the fourth comparison block 16, a score 0 is formed, proportional to the component of the moment of resistance created by the additional brake 7 which enters the first input of the adder 19s where it is added to the second input of the adder 19 is from the output of the differentiator 18. The signal from the output of the adder 19 is fed to the input of the additional brake control unit 8.

Thus, on the output shaft 6 of the tested transmission 3, a moment of resistance is formed, the static component of which is created by the brake 4, and the dynamic component is u -. schA - additional brake 7

Separate formation of static and dynamic components of load Q on the output shaft 6 of the tested transmission 3 provides the possibility of creating higher frequencies of load oscillations, which improves the accuracy of reproduction of the operating loading modes.

For rmule inventions

Stand DD1Ya test transmissions, co-driveJ w drive engine, kine0

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magically connected to the input shaft of the transmission under test, brake is kinematically connected to the output shaft of the transmission under test, brake control unit, brake torque sensor, torque sensor signal converter, the first input of which is connected to the output of the brake torque sensor, setting device , the first comparison unit, the first input of which is connected to the first output of the driver, the second and third comparison units, the adder and the differentiator, characterized in that, in order to Increasing the reproduction accuracy of the operating modes of the load, it is equipped with an additional brake, kinematically connected with the output shaft of the test transmission and installed with a spindle and brake, torque sensor of the additional brake, the output of which is connected to the second sensor signal converter .Belousko Editor M.Kelemesh Tehred A. Kravchuk Proofreader A, Obruchar

Order 6278/44

Circulation 847

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

an additional brake, the input of which is connected to the output of the adder, a doubling unit, the input of which is connected to the first output of the torque sensor signal converter, and the output to the second input of the second comparison unit, the fourth comparison unit, the first input of which is connected with the output of the second comparison unit, the second input with the output of the first comparison unit, and the output with the input of the differentiator and the first input of the adder j with the second output of the torque sensor signal converter with The first output is connected to the first input of the third comparison block, and the second input of the first comparison block, the output of the differentiator is connected to the second input of the adder, and the second output of the driver is connected to the second input TjpeTbero of the comparison block, the output of which is connected to the house of the brake control unit.

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Claims (1)

SUMMARY OF THE INVENTION A test bench for transmissions containing a kine5 drive motor 144 magically connected to the input shaft of the tested transmission, a brake kinematically connected to the output shaft of the tested transmission, the brake control unit, the brake torque sensor, the signal converter of the torque sensors, the first input of which is connected to the output of the brake torque sensor, the master , the first comparison unit, the first input of which is connected to the first output of the master device, the second and third comparison units, an adder and a differentiator, 15 characterized in that, for the purpose To increase the accuracy of the reproduction of operational loading modes, it is equipped with an additional brake kinematically connected 20 to the output shaft of the tested trans. mission and installed between it and the brake, the torque sensor of the additional brake, the output of which is connected to the second input of the sensor signal transducer 1226 of the 6th moment, by a control unit, an additional brake, the input of which is connected to the output of the adder, a doubling unit, whose input is connected to the first output of the torque sensor signal converter, and the output - with the second input of the second comparison unit, the fourth comparison unit, the first input of which connected to the output of the second comparison unit, the second input to the output of the first comparison unit, and the output to the input of the differentiator and the first input of the adder, while the second output of the converter of signals of the torque sensors with connected to the first input of the second comparison unit, the first output with the first input of the third comparison unit, and with the second input of the first comparison unit, the output of the differentiator is connected to the second input of the adder and the second output of the master device is connected • to the second input of the third comparison unit, the output of which connected to the input of the brake control unit.