Common problems in the use of elevator

The elevator is a large mechanical equipment that is transported by changing the potential energy, such as the mine elevator, the dam elevator, etc. Broadly speaking, elevators, cranes, lifting, stabilizing cars, cranes, hoist and so on can be called elevators. Elevator generally refers to large power, strong lifting capacity of large mechanical equipment.

Drive with empty load. Therefore, all the materials in the hopper should be drained before each shutdown, and then stop. You can't reverse it. The chain derailment may occur when reversing, and it is very troublesome to remove the derailment fault. Feed evenly. No sudden increase in feeding quantity. The amount of feed should not exceed the conveying capacity of the elevator. Otherwise, it is easy to cause a serious accumulation of materials at the bottom of the 'stuffy car' accident. Add lubricating oil in time. The chain and hopper should be replaced in time when seriously worn or damaged.

Hoisting machine head wheel and bottom wheel drive shaft installation is not easy to cause the hopper belt deviation, the main form is: the head wheel and bottom wheel drive shaft in the same vertical plane and not parallel; Both transmission shafts are installed horizontally and not in the same vertical plane; The two drive shafts are parallel, in the same vertical plane and not horizontal. After the above situation, the hopper belt runs off, which is easy to cause the impact of the hopper and the barrel, and the tear of the hopper belt. In addition, the lifting head bears a large dynamic pressure, up to about 100 tons, and extrusion wear is inevitable in the bearing position due to long-term operation.

The traditional method is repair welding or machining after brush plating, but both of them have some disadvantages: the thermal stress generated by high temperature repair welding can not be completely eliminated, easy to cause material damage, resulting in bending or breaking of parts; The brush plating is limited by the thickness of the coating, easy to peel off, and the above two methods are metal repair metal, can not change the 'hard to hard' cooperation relationship, under the combined action of various forces, will still cause wear again.

In response to the above problems, European and American enterprises mainly use polymer composite material repair methods, of which the most mature application is the United States Fosseblue technology system. The polymer material has strong adhesion, excellent comprehensive mechanical properties, and can be disassembled without machining. Neither repair welding thermal stress impact, repair thickness is not limited, while the product has the metal material does not have the concession, can absorb the impact vibration of the elevator, avoid the possibility of wear again, and greatly extend the service life of the equipment components, for the enterprise to save a lot of downtime, create huge economic value.