Typical failure analysis and processing of belt conveyorLihua ZHAO,Yin LINSchool of Mechanical Engineering, Northeast Dianli University, Jilin City, Jilin Province Changchun Road 169,132012,ChinaAbstract:The paper analyzes two typical failure forms of roller and conveyor at the belt conveyor, and describes the maintenance methods of prevention and elimination failures to ensure the normal operation of belt conveyor.1. Introduction:Belt conveyor is a commonly used equipment of continuous transport, it has a high efficiency and large conveying capacity, simpler construction, small amount of maintenance. Can be achieved at different distances, different materials transportation. It iss widely used in mining, coal handling system in thermal power plant and other projects. Belt conveyor will often occur some typical problems in the course, this paper Based on research common typical failure of belt conveyor during use, analysis the cause of failure, proposed some effective methods to solve the problem.2. Typical faults of conveyor belt:2.1. Conveyor belt deviationIn the belt conveyor, as the conveyor belt is traction components, transmit power and motion, also is carrying components, support material load. Working more complex, so at work often happen belt deviation. Deviation is the conveyor belt during operation, the center line of belt deviation the center line of conveyor. As the conveyor belt deviation may cause between the belt edge and rack wear, cause belt edge premature damage, Ranging impact the life of conveyors, affect the throughput of materials, Weight is caused by withdrawal material, even happen stop occurrence, direct impact on production. As the conveyor belt is more important, the most expensive parts. Its price about 25%50% to the conveyor. So analysis the reasons of belt deviation, reduce and eliminate belt deviation, It is an important part of ensure belt to work, extend equipment life. Cause the belt occurs deviation because of the following factors.2.1.1. In the device itselfa. Rack rigid is poor, large deformation under load, causing the belt deviation.b. The larger error of roller outer cylindrical, caused deviation when the conveyor belt running.c. The supporting roller rotation is not flexible, causes the conveyor belt both sides stress to be uneven, causes the conveyor belt deviation.d. The parallelism error cylindrical axis and roller axis is too big, causes the conveyor belt deviation.e. Conveyor belt itself is questionable quality, thin and thick uneven, caused a shock lead running conveyor belt deviation.f. Conveyor belt manufacturing quality have defects, the length of belt both sides edge is inconsistent, cause running conveyor belt deviation.g. Not parallel with belt connector, connection error is too big, cause belt deviation.2.1.2. Installation adjustmenta. Drive, change roller axis and conveyor centerline vertical error is too big, make conveyor and horizontal line have a bigr inclination, cause belt deviation.b. Roller axis and conveyor centerline vertical error is big, will cause belt deviation also.c. The connection strength between rack and ground is not enough, the rack unstable, causing belt deviation.d. The feeding plate of discharge trough and improperly located, both sides of the conveyor belt uneven force cause belt deviation.2.1.3. With maintenancea. The cleaning performance of sweeper is poor, make the roller cylindrical diameter local increases.b. Feeding mouth location is wrong, so that the material partial load on the conveyor belt, cause belt deviation.c. Poor maintenance and improper adjustment, resulting in the conveyor belt deviation.d. For the steel cord belt, as the manufacture of steel cord is uneven force, so that a deviation occurs in the operation, or a strong difference of belt, large elongation under load, causing the vibration, the belt will deviation.e. Also, the vibration of running conveyor belt system can cause the deviation.f. In addition, when conveying some viscous material, make the roller, etc. bonding materials, make the cylindrical diameter of roller part increases, causing belt deviation.2.2. Measures to prevent the belt deviation2.2.1. Due to equipment in the manufacture of conveyor belt causes the deviation, primarily through improved design, manufacture precision to prevent and reduce the occurrence of conveyor belt deviation.2.2.2. For installation adjust improper and daily use causes deviation, mainly the following aspects should be considered: Conveyor belt in drive roller or on rear rollers deviation, usually by adjusting the position of the roller bearing ways to eliminate, usually by adjusting the position of the roller bearing ways to eliminate.a. The longitudinal centerline of the roller rotation axis and conveyor is not perpendicular, resulting in the conveyor belt one side loose and the other tight, belt move from the tight side to the loose sid