ОN THE INTEGRATED CRITERIA OF MACHINERY AND EQUIPMENT RELIABILITY

On the example of chain conveyors, the article shows the relationship between the change in the operation process of constructive, energy and other parameters of a machine and reliability parameters. The authors have presented the analysis of methodological approach that is based on wear and damage of machine parts with increase in the duration of their operation and the impact of these changes on the performance of a machine. On the example of heavy-duty transporters, the paper presents the method which shows that at a constant load of conveyor (Q и W-const ) with increase in the duration of its operation, the power required to drive it will also increase. According to this parameter, one can judge about the current status of power components of a conveyor, and it is also possible to calculate the reliability (longevity, failure-free performance, etc.). If you use a chain with links strengthened by innovative technologies (e.g., wear-resistant coatings and modification of surface layers by diffusion saturation, etc.) longetivity increases. The energy supplied to the machine is spent on useful work and overcoming friction forces and other resistance forces arising in the machine elements. As you increase the duration of operation, the condition of machine parts changes (due to wear, corrosion, fatigue and other destructive processes). These changes mainly cause more energy consumption for overcoming them. Thus, when having a constant load of conveyor (Q и W-const ) with increase in the duration of its operation the power required to drive it will increase too. For this parameter which is easily measured by appropriate instruments, it is possible to judge the current status of the power components of a conveyor, and calculate the reliability (longetivity, failure-free performance, etc.)., etc.). One of the important indicators of reliability of complex machinery is maintainability. Machines parts are restored in parallel in specialized shops or businesses, and the repair time does not overlap with the downtime of the whole machine to be repaired. Therefore, maintainability in such cases can be more properly evaluated using such an indicator as the complexity of maintenance and repair. The article shows the possibility of evaluating machine reliability according to the complexity of works, their maintenance and repair. The obtained dependences established for evaluation of reliability of machines on the basis of complex criteria can be used at the design stage, when calculations of the output parameters can be carried out instead of costly full-scale or bench testings.

надежность, технический уровень машин и оборудования, долговечность, увеличение производительности, конструктивные, энергетические параметры машин, показатели надежности, ремонтопригодность, трудоемкость технического обслуживания и ремонта, reliability, technical level of machinery and equipment, longevity, performance increase, constructive and energy parameters of machines, reliability parameters, maintainability, complexity of maintenance and repair

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