Abstract
Automatically controlled hydraulic tension systems adjust the tension force of a conveyor belt under different working conditions. Failures of an automatically controlled hydraulic tension system influence the performance of conveyor belts. At present, the maintenance of automatically controlled hydraulic tension systems mainly considers the replacement of components when failures occur. Considering the maintenance cost and downtime, it is impossible to repair all the failed components to improve the hydraulic tension system. One of the key problems is selecting the most valuable components for preventive maintenance. In this paper, preventive maintenance for multiple components in a hydraulic tension system is analyzed. An index is proposed to select more reliable preventive maintenance components to replace the original ones. A case study is given to demonstrate the proposed method. When the cost budget increases, there are three different variations in the number of components for selective preventive maintenance (SPM).
Highlights
In recent years, with the development of automation technology and increasing demand in industry, an automatically controlled hydraulic tension system is increasingly being used in conveyor belts [26]
Many scholars have studied the maintenance of hydraulic systems [18, 20, 25], but few researchers focus on the preventive maintenance of hydraulic tension systems due to their high system complexity
Joint importance measures are applied to an automatically controlled hydraulic tension system, the important components in the system are identified, and the weak components are replaced in advance to ensure the reliability of the hydraulic system
Summary
With the development of automation technology and increasing demand in industry, an automatically controlled hydraulic tension system is increasingly being used in conveyor belts [26]. Joint importance measures are applied to an automatically controlled hydraulic tension system, the important components in the system are identified, and the weak components are replaced in advance to ensure the reliability of the hydraulic system. The following problems exist in preventive maintenance of a hydraulic tension system: choosing how to identify other key components in the system during maintenance and choosing how to perform preventive maintenance on these key components under different cost constraints to increase system reliability. This paper studies the preventive maintenance of key components in hydraulic tension system under cost constraints. A SPM model based on importance measures is proposed to select key components that require preventive maintenance under different cost constraints.
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