Application of hydraulic brake on lower belt conveyor

1. Downward Belt Conveyor brake features Analysis: As the coal mine under poor working conditions, under the belt conveyor brake must address the following three technical problems:

1 brake equipment must have explosion-proof and good heat dissipation;

2 The brake device has a smoothness when braking, and there is no possibility of rolling;

3 When the brake equipment is in the event of a power outage in the mining area, it is required to automatically and quickly put into the brakes, and to avoid the occurrence of sparks and rolling.

2. Hydraulic brake braking mechanism analysis: Hydraulic brake is a liquid component that transmits and transforms energy through the change of working fluid kinetic energy. It consists of a moving wheel and a fixed wheel; because the hydraulic brake is a special hydraulic coupling, After the original characteristics of the hydraulic brake are determined, the braking force depends on the external characteristics. The flow rate directly affects the braking torque. Therefore, by controlling the flow rate Q, the braking torque M can be adjusted to maintain a stable system. Reduce the acceleration.

3. Analysis of hydraulic brake characteristics: The following points can be seen from the hydraulic brake performance test table:

The braking torque of the four brake gears is obviously different. As the brake grade is increased, the braking torque is gradually increased, the braking acceleration is increased correspondingly, and the braking time is shortened.

2 Increased the smoothness of the brake. As the belt speed increases and the inclination of the conveyor increases, the superiority of the automatic adjustment of the hydraulic brake can be displayed.

3 The smaller the oil filling amount Q in the hydraulic brake, the smaller the maximum braking torque that forms the brake.

4 between 450 and 500r/min, the load torque and braking torque are balanced. At this time, most of the energy of the conveyor and materials has been absorbed by the hydraulic brake. At this time, the mechanical brake is used to stop. Solve explosion and speed problems.

The 5 hydraulic brake is a device that consumes energy. Therefore, it only works when braking, and it does not work when braking is not required.

6 When the load torque increases, the braking torque of the hydraulic brake increases accordingly. In theory, as long as the strength of the blade is large enough, the braking torque can be increased indefinitely, and the belt conveyor will not fly. Therefore, the power is applicable to a wide range. .

Based on the above analysis, the hydraulic brake has high reliability and stable braking. It is an ideal supporting equipment for coal mine underground conveyor belts. It is currently in Huafeng Coal Mine of Xinwen Mining Bureau and Huopu Mine of Panjiang Mining Bureau. The ground was successfully applied.

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