The anti-overspeed performance of the vehicle reducer is reflected by the unit braking energy of the test reducer. For the three-position reducer, the unit braking energy design of the reducer is h = 0.12 (m/m), and on rainy or oil-polluted wheels, the braking energy is reduced to 0.10 and 0.03 (m/m), respectively. If the unit braking energy of the decelerator installed with the brake beam in the new design can be guaranteed to be greater than the design value of the decelerator, the problem of overspeeding the trolley unit can be completely solved. The test method is to calculate the acceleration of the vehicle by controlling the radar speed curve of the system and calculate the unit braking energy.
By systematically analyzing the causes of overspeed and deceleration device braking noise of the scooper group, combining laboratory and field tests to test the oil sensitivity and noise reduction performance of the material, the composition, structure, structure and hardness of the test material are continuously changed. Finally, we successfully developed a decelerator anti-noise brake beam.
The anti-noise and noise reduction brake beam has low sensitivity to oil and water, and has obvious anti-super effect. The unit braking energy is high enough to meet the design requirements, and the safety of the shunting operation is effectively guaranteed.
Compared with the ordinary brake track, the noise reduction efficiency reaches 100%, of which more than 80% can reduce 20dB (decibels), the highest decibel number is distributed below the frequency of 2kHz, and the decibel number is not mutated at 0 to 10kHz and is no longer harsh The high-sound-pressure squeak noise greatly improves the noise environment around the marshalling yard and is conducive to the physical and mental health of the operators. In a period of overhaul, there is no need to replace the brake beam, and only the composite composite brake splint needs to be replaced. The total cost is low. And the splint is lightweight and easy to replace. Through the adjustment of the brake splint material composition, organization, structure and hardness, the purpose of the brake deceleration device inside the brake splint can be used for 5 to 8 years, the outer brake splint can be used for 3 to 5 years, to meet the requirements.
A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation). The hydraulic motor is the rotary counterpart of the Hydraulic Cylinder as a linear actuator. Most broadly, the category of devices called hydraulic motors has sometimes included those that run on hydropower (namely, water engines and water motors) but in today's terminology the name usually refers more specifically to motors that use hydraulic fluid as part of closed hydraulic circuits in modern hydraulic machinery.
Conceptually, a hydraulic motor should be interchangeable with a hydraulic pump because it performs the opposite function - similar to the way a DC electric motor is theoretically interchangeable with a DC electrical generator. However, many hydraulic pumps cannot be used as hydraulic motors because they cannot be backdriven. Also, a hydraulic motor is usually designed for working pressure at both sides of the motor, whereas most hydraulic pumps rely on low pressure provided from the reservoir at the input side and would leak fluid when abused as a motor.[1]
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