What are the measures to prevent shearer slippage?

It is mainly composed of three parts: 1. a cutting part, which is used for coal breaking and coal loading; 2. The traction part provides power for the mobile shearer; 3. The electric control box controls the electrical equipment on the shearer. Shanghai Daqi Mine Electromechanical specializes in the production and sales of coal mine shearers (including open-pit shearers), roadheaders, conveyors and other equipment and accessories, and the specific contact manager 13916206820

Answer: When the inclination angle of the working face is greater than 15° and the coal is cut upward, the sliding frame should be pushed in time to make the bending section of the conveyor close to the shearer as far as possible. Once the chain is broken and the shearer slides, the drum can be inserted into the coal wall along the curved section of the conveyor to prevent the shearer from continuing to slide.

When the middle of the working face is stopped, the shearer should be stopped in the bending section of the scraper conveyor, so that the lower drum tightens the coal wall. When the shearer is tightly chained, the lower drum of the shearer should be placed in the incision. When the inclination angle of the working face is large, one-way coal cutting can also be used to prevent the shearer from sliding by the coal wall.

Use the anti-slip bar device correctly. Proper use of hydraulic safety non-skid winch.

Strengthen the maintenance of the equipment, tighten the loose connectors in time, eliminate the flash joints and stubble of the guide pipe, the middle groove and the shovel plate, replace the parts that have been worn out and overrun, and adjust the gap of the hydraulic brake device in time to ensure the braking torque.

Use a compensating towchain chain tightening device. When conditions permit, try to use chainless traction.

At present, the shearer used in the coal mine adopts airborne AC frequency conversion speed regulation pin-rail non-chain traction. When the general slope of the shearer reaches 13-15 degrees, it is generally necessary to take anti-skid measures, because the brake brake installed at the inner traction place can no longer effectively brake the shearer. In the process of maintenance, when the shearer drum is separated from the coal wall or the drum is raised, the shearer is prone to sliding, and it is necessary to install a stall pin at the outer traction pin row to prevent the shearer from sliding, and the installation of the stall pin is as close as possible to the external migration place.

The following measures are generally taken for shearer anti-skidding: 1. Adjust the brake of the coal mining mechanism.

2. When the shearer is overhauled, install the gear pin.

Generally, the inclination is greater than 12 degrees to use anti-skid measures, the shearer generally has a hydraulic brake, when the shearer stops, the traction motor stops working, the auxiliary pump has no power source so stop the oil supply, this is the hydraulic brake locked, so the shearer will not slide. For the safety period. When necessary, secondary protection can be set up, and an iron rod or pin can be inserted into the neutral gear of the rack above and below the shearer as a gear pin.

Antiskid? It depends on what the working face looks like, and if it is an inclined shearer, it must be non-slip.

The first floor is relatively one-sided, and it should be analyzed on a case-by-case basis. There should be an optimal matching value for different parameters such as drum diameter, rotation speed, and traction speed at different mining faces; Generally speaking, if conditions permit, try to choose a shearer with higher power, because if the power is high, the reliability of the shearer design will be higher. In addition, improving efficiency should also include other management factors, such as the maintenance of the shearer, the proper use of the shearer, the rationality of the three-machine matching, the rationality of the coal mining process, and so on.

Improving the efficiency of shearers can be carried out in the following ways:

1. Increase the diameter of the spiral.

2. Increase the spiral rotation speed.

3. Speed up the traction speed of the unit.

Answer: The main reasons for the decline of the surplus coal machine are: 1. The connection device at the end of the traction chain is damaged or broken; 2. The traction chain is too loose, easy to roll and nest chain; When reverse traction, it is easy to bite and jump the chain, which leads to chain breakage; 3. The traction chain adopts rigid connection, and there is no compensating chain tightening device; 4. The wear of the chain guide exceeds the limit, so that it loses the role of the chain guide; 5. The tow chain is worn out of the limit, and the chain is broken when it is subjected to impact load; 6. There is stubble in the middle trough, coal retaining plate, guide pipe, and shovel plate, which causes the traction resistance of the machine to increase suddenly and cause chain breakage; 7. The operation is not standardized and the chain is broken when connecting the chain link; 8. The braking torque of the traction hydraulic brake is too small or fails.

The precautionary measures are as follows: 1. When the inclination angle of the working face is greater than 15 degrees and the coal is cut upward, the sliding frame should be pushed in time to make the bending section of the conveyor close to the shearer as far as possible. Once the chain is broken and the shearer slides, the drum can be inserted into the coal wall along the curved section of the conveyor to prevent the shearer from continuing to roll forward and slide.

When the machine is stopped in the middle of the working face, the shearer should be stopped in the bending section of the scraper conveyor, so that the lower drum is close to the coal wall. When the shearer is tightly chained, the lower drum of the shearer should be placed in the incision. When the inclination angle of the working face is large, one-way coal cutting can also be adopted, that is, the shearer is empty when going up, and the coal is cut by the shearer when going down, so as to prevent the shearer from sliding.

2. Use the anti-skid bar device correctly. 3. Correct use of hydraulic safety anti-skid winch. The traction speed of the winch and the shearer must be synchronized.