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Real-scale brake testing machine at constant speed. |
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- An AC motor makes the brake disk rotate at a constant speed of 660 rpm.;
- At programmed time intervals brake applications are actuated.
They may be controlled in pressure or in torque modalities.
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Use of the machine: |
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- It is a reference machine typically used for quality control or for the development of materials in the After Market sector:
A (sample) test is carried out on a given sample brake and the results are filed;
The brake component (lining, disk, caliper), the quality of which is required to be tested or which is in the development phase, is then fitted and the sample test repeated;
The differences between the sample and the tested material are evaluated by analyzing the results.
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Features |
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- The machine is managed by a PC, which monitors the tests execution.
- The operator defines the following parameters by interacting with a test description environment:
- The braking times and the pause between consecutive brakings.
- The maximum and minimum temperatures for the testing and cooling phases of the brake.
- The control modalities of each single brake application:
In pressure.
In torque.
In force (applicable if the machine is equipped with the Hand Brake option).
- During the test, the following Time Histories are recorded:
Six temperatures (two of which inside the rotating part of the brake).
Pressure.
Torque.
Residual torque.
Force and stroke of the hand brake (optional).
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Technical characteristics: |
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- 140 kW motor.
- Maximum torque: 2 kN*m.
- Maximum pressure: 200 bars.
- Maximum force applicable to the hand brake: 2 kN.
- Maximum stroke of the hand brake: 500 mm.
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Options |
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- The machine can be equipped with:
- Hand brake.
- Automatic sprinkling of the brake (also with “salt” water).
- Additional AC motor with vectorial control for tests at a low number of revolutions (from 0 to 10 rpm). This option allows the following types of tests to be carried out:
- Evaluation of the friction at 3 rpm.
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Sticking: evaluation of the detachment torque after the brake has been operated for 24 consecutive hours without any release.
Evaluation of the static friction (with the brake activation controlled under pressure or force exerted on the hand brake).
Hill hold: evaluation of the static holding of the brake during the cooling phase.
Creep Groan: research on the noise when starting to move.
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