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Introduces the working principle of brake system (B)
Because the brake is used in machine electricity type, so the test of the electrical part of the brake is also very important.
The drum is fixed on the wheel hub, wheel rotates together with. In the brake plate fixed, two support pin, support the lower end of the two arc-shaped brake shoe. The outer circle surface of brake shoe with friction plate. Brake plate is also provided with a hydraulic brake wheel cylinder, oil 5 and hydraulic brake master cylinder mounted on the frame is connected.
1.In the working voltage, the traction machine operation mechanism, load sustained rate and cycle operation, when the brake to achieve thermal stability, measuring the brake coil temperature rise. Method for measuring GB 755-2008 "rotary motor rating and performance" article 8.6.2 resistance measurement and calculation.
The insulation class B, brake coil temperature should not exceed 80K; the insulation class F, brake coil temperature should not exceed 105K. For the bare surface temperature of more than 6 (TC brake, should be increased to prevent scalding warning signs.
2.The coil voltage withstand test brake should meet the conductive part for lmin to 1000V applied voltage, between, should not appear the breakdown phenomenon.
3.Should be raised minimum pull in voltage and the release voltage brake electromagnet test after the end of the brake temperature. GB/T 24478-2009 "elevator": brake electromagnet minimum pull in voltage and release voltage should be less than the highest rated voltage of 80% and 55%.
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Article tags: Brakes,Clutches,Power Transmission.
