Abstract
The paper is proved to one of the important conveyer transport system task – to roller’s term of service (TS) determination. The task solving permit to evaluate the different designs belt conveyers reliable. The article represent the tasks of belt conveyers roller’s average TS determination were set and solved for the different types of roller supports. Dynamic efforts arised with the loading motion and caused with belt bend are principal factor for the calculation of TS rollers. The graph of dependence roller’s average TS from belt velocity for different roller’s types were obtained. Obtain analyses results permit to set: average roller TS decrease under velocity increases for all types of roller’s, TS for dumping overhead roller supports and damping roller supports is substantially greater, then for hard and overhead roller supports. In addition, at some values of the belt velocity TS service can sharply decrease for all types of roller supports. It takes place in resonances related to vibrations of belt at motion of large pieces of load. Achieved results may be applied in mining, metallurgical and building industry.
Highlights
Conveyor framework with roller support is an important part of a belt conveyor, the technical condition of which determines the reliability of the conveyor as a whole.Reliability of the framework is determined by the reliability of the rollers of the roller supports, as the reliability of the supporting metal structures is much higher.An important indicator for assessing the reliability of a roller is its term of service, depending on the type, parameters of roller supports and operating conditions.The task of determining the term of service of belt conveyor rollers was studied by L.H
For ball radial and radial thrust bearings, as well as roller radial thrust bearings, the dynamic radial load is calculated using the formula [5]: Pm=V KtKsFr, where Fr is the radial load on the bearing; V is the coefficient of rotation; Kt is the temperature coefficient chosen from the tables [5]; and Ks is the safety factor chosen from the tables [5]
Substituting (4) into (1), taking into account (5) – (9), and substituting the resulting expression for the resource L09 into (2), we determine the average term of service of the bearing
Summary
Conveyor framework with roller support is an important part of a belt conveyor, the technical condition of which determines the reliability of the conveyor as a whole.Reliability of the framework is determined by the reliability of the rollers of the roller supports, as the reliability of the supporting metal structures is much higher.An important indicator for assessing the reliability of a roller is its term of service, depending on the type, parameters of roller supports and operating conditions.The task of determining the term of service of belt conveyor rollers was studied by L.H. Conveyor framework with roller support is an important part of a belt conveyor, the technical condition of which determines the reliability of the conveyor as a whole. Their works showed that the main cause of roller failure is the failure of the bearing unit, the loads on the rollers during transportation of the rock mass are determined and, on the basis of this, formulas for calculating their term of service are proposed. When this load on the bearings of the rollers, arising from large pieces of load, not considered accurately enough
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