Nowadays, almost all Hydroelectric Power Stations are unmanned, and the maintenance of their equipment is mainly based on regular inspections by inspectors. However, due to the reduction of skilled maintenance workers and the excessive reliance on the technical level of the maintenance personnel during inspections, from the point of view of the safe operation of the system, it is necessary to effectively prevent failures and effectively maintain the equipment. There are certain problems, so the concept of preventive maintenance came into being
Generally speaking, Water Turbine maintenance technology is divided into three categories: failure maintenance (post-incident maintenance) after the occurrence of a failure, preventive maintenance with regular decomposition and inspection, and predictive maintenance (predictive maintenance) for prediction and processing based on diagnostic data. These are the meanings of preventive maintenance in a narrow sense. In a broad sense, preventive maintenance also includes the prevention of failures, the judgment of the location and cause of the failure, the determination of early recovery means and methods, safe operation and return operations, etc. The following is a general outline of the relevant technology.
The purpose of preventive maintenance is roughly divided into three aspects: economic improvement, technical ability improvement and quality (reliability) improvement.
It is designed to prevent accidents before they happen, or once an accident occurs, the downtime of the equipment can be shortened due to early detection, and the operation of the equipment can be improved. In addition, unnecessary redundant repairs are avoided and optimization is sought to reduce repair costs.
In response to the reduction of skilled maintenance workers, the system brings together the skills of various skilled maintenance workers, removes the differences among people, and develops from intuitive judgments to quantitative analysis.
Prevent emergencies, or use early detection in the event of emergencies to ensure safety and improve reliability.
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