Preventative maintenance method of fan gear case

Abstract

The invention discloses a preventative maintenance method of a fan gear case. The preventative maintenance method of the fan gear case includes: assuming factors which influence preventative maintenance of the fan gear case; obtaining failure rate of the fan gear case, which conforms to two parameter Weibull distribution, by processing failure data on the fan gear case, and using a maximum likelihood estimation method to figure out shape parameters and dimension parameters of the fan gear case; introducing a service age reduction factor and failure rate progressive increase factor mixing failure rate concept, and listing the failure rate and the failure number of the fan gear case in a preventative period; fully considering halt loss and halt time of a fan, and building a total preventative maintenance cost model of the fan gear case in a complete update cycle; adding constraint conditions of reliability in the optimum update cycle of the fan gear case, and building an optimum model which aims at minimizing total maintenance cost of the fan gear case in the optimum update cycle; using a genetic algorithm to perform a global search on the established optimum model, and using a nonlinear plan to perform a local search so as to obtain an optimum solution of a problem.

Description

technical field [0001] The invention relates to a maintenance method for a wind turbine gearbox, in particular to a preventive maintenance method for a wind turbine gearbox. Background technique [0002] With the increasing scarcity of world energy and the deterioration of the ecological environment, wind energy, as a clean and environmentally friendly renewable energy, has been widely valued by countries around the world since the mid-1970s, and the wind power industry has developed rapidly in the past 40 years. According to According to statistics from the Global Wind Energy Association, in 2013, the total annual installed capacity of wind turbines in the world was 35GW, and the cumulative installed capacity reached 318GW. The direction of quality offshore wind turbines. [0003] With the continuous increase of the installed capacity of wind turbines, the operation and maintenance of wind power equipment is imminent. Among them, the frequent failure of wind turbine gearbo...

AI Technical Summary

Problems solved by technology

[0004] In the actual maintenance of wind turbines, the gearbox components of wind turbines are often maintained based on operating experience. Although some scholars have established an optimization model for preventive maintenance strategies within a limited time by citing service age regression factors, they believe that each preventive cycle is This is not consistent with engineering practice, because preventive maintenance cannot make the equipment repair as new, and as the number of preventive maintenance increases, the failure rate of its components will also increase; some scholars consider the preventive maintenance cycle According to the change of maintenance frequency, the optimal model of preventive maintenance cycle is established, but the relationship between component reliability and maintenance cost is not considered

Images