SU1530965A1 - Bench for service-life testing of safety release clutches - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to testing equipment for testing safety couplings. The purpose of the invention is to expand the functionality by reproducing the boundary conditions of operation and ensuring control of the operation of the test coupling. The bench consists of a drive 1, a loading device of reference couplings (EM) 8 and 9, means for fastening the test coupling (M). Sensors 14,15,16 are installed on M and EM, which are connected to an automatic analyzer 26. One of the computers is adjusted to the minimum torque, and the other is adjusted to the maximum. For both computers, the drive coupling halves are connected with the shaft of the loading device 5 via gears 6 and 7, and the driven coupling halves are connected with the drums of the brakes 12 and 13. When the loading device is turned on, the shaft 4 stops. Test clutch 3 slips. When disconnecting the loading device, the EM 9 slips. After the brake 13 is turned off and the brake 12 is applied, it slips. After the brake 13 is turned off and the brake 12 is switched on, the M 3 slips, and the EM 8 does not slip. 1 il.

Description

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sensors 14, 15, 16, which are connected to the automatic analyzer 26. One of the EMs is adjusted to the minimum torque, and the other is adjusted to the maximum. For both EMs, the drive coupling halves are connected with the shaft of the loading device 5 via gears 6 and 7, and the driven coupling halves are connected with the drums of the brakes 12 and 13. When the loading device is turned on, the shaft 4 stops. Test clutch 3 slips. When the EM 9 loading device is disconnected, it becomes stuck. After the brake 13 and VC are disconnected: the brake 12 loses M 3 and the EM 8 does not slip. 1 or

The invention relates to the field of mechanical engineering, in particular, to testing equipment intended for carrying out accelerated life tests of couplings.

The aim of the invention is to enhance the functionality by reproducing the boundary conditions of operation at the stand and directly controlling the torque of the safety clutch under test, while reducing the life time of the life test.

The drawing shows a schematic diagram of the stand.

The bench consists of a drive motor 1, the power of which is transmitted by transmission 2 to the test clutch 3, installed with one coupling half on the intermediate shaft 4 connected to the loading device 5, and with the second coupling half on the shaft of the chain circuit. Intermediate wad 4 is connected by means of intermediate gears 6 and 7 with reference clutches 8 and 9, adjusted respectively to the maximum and minimum moments of the test clutch and installed driven coupling halves on shafts 10 and 11 connected to the drum brakes 12 and 13 and leading coupling halves on The intermediate gear shafts 6 and 7. Pulse sensors 14–16 are mounted on the test sleeve 3 and the reference sleeves 8 and 9, which, together with the load control device 17 and the switches 18 and 19, function as and belt brake controls, reference couplings, are connected by electrical circuits 20-25 with an automatic analyzer 26.

The stand works as follows. When the engine 1 is turned on, the stand idles, while rotating

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with all shafts, test and reference couplings, loading device and drum brakes reference couplings.

When the loading device 5 is turned on by means of the control 17, the shaft 4 is stopped, the gears are continuous and the reference clutches 8 and 9, the shafts 10 and 11 and the drum brakes 12 and 13, the test clutch 3, imitate under operating conditions. Then the loading device 5 is disconnected by means of the control 17 and the brake 13 is activated by means of the switch 19, while the reference clutch 9 must slip as it is adjusted to the minimum torque of the test clutch 3,

After that, brake 13 is turned off using switch 19 and brake 12 is turned on using switch 18, the test clutch 3 slips and the reference clutch 8 does not slip as it is adjusted to the maximum torque of the test clutch 3. The cycles repeat many times until until the sequence of operation of the elements of the stand is disrupted.

Violation of the specified sequence of operation of the stand elements indicates the end of the service life (loss of operation or jamming) of the safety clutch 3, as evidenced by the pulse sensors 14-16 and control means 17 or switches 18 and 19 that the sequence of operation of the stand elements along electrical circuits 20-25 into the automatic analyzer 26, which turns off the stand and indicates the loss of performance or jamming of the test coupling 3.

Thus, during the operation of the test bench, the nepsk is automatically provided: - a durable control of the torque of the tested safety clutch after its operation in each cycle without stopping the test bench, which reduces the time for testing.

Claims (1)

The invention The stand for life tests of pre-protection clutches, containing the drive and controlled loading device, means of fastening the coupling half of the test coupling, placed on the shaft of the loading device and the output shaft of the drive, is expanding the functionality by reproducing the limiting operating conditions and ensuring control of the test sleeve, it is equipped with two adjustable reference clutches, controlled brakes, pulse sensors, and the test subject g couplings and an automatic analyzer, with the leading coupling halves of the reference couplings kinematically connected with the shaft of the loading device, and the driven coupling halves with brakes, pulsed 5, the sensors and controls for the loading device and the brakes are electrically connected to the automatic analyzer.