SU1576995A1 - Stand for testing tractor generators - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the range of effects, reduce testing time and increase operational reliability. A test bench for autotractor generators comprises a stand 1 and a table 3 with accessories. Due to the fact that the table is equipped with sleeves for its swinging and a cam mechanism for lifting it, as well as a stabilization mechanism, the goal is achieved. 1 il.

Description

The invention relates to electrical engineering and can be used in enterprises for repairing automotive and tractor electrical equipment as a test tool for conducting accelerated tests of automotive and tractor generators, in particular for determining reliability indicators under shock-vibration (dynamic) loads.

The purpose of the invention is to expand the range of effects, reduce testing time and increase operational reliability.

The drawing shows the kinematic scheme of the proposed stand.

The stand consists of a frame 1 with an emphasis 2, a table 3, made in the form of a rocker arm, swinging on sleeves, mounted on a frame 1 with devices for fixing generators and tensioning belts, a vibrator A, suspended from one side to the table 3 with two shock absorbers 5 fixed under the table to the frame 1 with the ability to interact with the table, the cam mechanism for swinging the table, which serves to reproduce the impact load of the table against the stop due to the potential energy of the compressed shock absorber and consisting of the cam 6, allowing Blow one side of the table 3, pusher with roller 7. resting on cam. 6 intermediate shaft 8 with pulleys mounted on base 1, main drive with belt tensioning mechanism, pneumatic cylinder 10 for pressing the table against the stop in the absence of shock vibration loads on the table (under other influences the table is pressed against the stop) and hinged hood 11, which, when closed, creates a chamber inside which electric heaters 12 are installed, and outside the device 13 for supplying dust and steam. Coaxially with the intermediate shaft on the bed 1 is installed bushings 1.

The stand works as follows.

After closing the cowl 11 on the base 1, a chamber is formed in which, when the main drive 9 is turned on, the torque is transmitted by the V-belt through the pulleys to the intermediate shaft 8, and from the pulley from the other end of this shaft the torque is transmitted directly to the pulleys

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Nerators located symmetrically to the axis of swing of the table 3, in order to provide the same amplitude under dynamic (vibration and shock) loads.

According to the cyclogram, heaters 12, a device for increasing humidity (steam supply), a dust and air supply device 13 for spraying it, a vibrator k suspended from the table and creating accelerated sinusoidal vibration with a constant frequency and adjustable amplitude, periodically turn on automatically; the drive of the cam 6 rotation mechanism, which lifts the left edge of the table with a constant frequency and amplitude, while the right edge of the table 3 compresses the shock absorber 5. When the roller pushes off, the cam 6 from the cam 6 The shock absorber 5 table 3 strikes against the control plate 2 fixed on the frame 1. When vibration or shock load is turned off, the pneumatic cylinder 10 automatically presses table 3 against the stop 2. Thus, the stand provides an extension of the range of the tested actions due to the possibility of reproducing shock vibration loads dust and increased humidity, reducing the overall duration of the test by saving time for re-installing the generators and ensuring normal operation of the V-belt drive transmissions weight distribution, vibration loads.

Claims (1)

Invention Formula Test bench for autotractor generators, in particular for determining reliability indicators under shock vibration loads, containing a frame, a table with fixtures for securing generators, an alternator shaft drive with pulleys, a heat chamber consisting of a hinged hood with electric heaters, shock absorbers, a vibrator fixed under the table, dust and moisture supply devices in the chamber, characterized in that, in order to extend the range of effects, reduce the time of testing, increase the operation reliability, the table is installed with the ability to swing on the sleeves, coaxially ras51576 56 installed with the intermediate shaft and the shock load, and from the installed on the bed, and the last other side, shock absorber is installed with a stop, near which the tori and the table stabilization mechanism are mounted on one side with a cam-like table pneumatic cylinder - to stop.