Reliability analysis and failure rate evaluation for critical subsystems of the dragline

摘要

In mining sectors, a dragline is used for removing overburden. The equipment consists of a number of subsystems. In mining industries, they have different bucket capacities and boom length. Dragline with a boom length of about 96 m and bucket capacity of around 24 m(3) are most common. Sudden failure of any of its subsystem will stop the machine from functioning. The present paper investigates the criticality and reliability analysis of the subsystems of three draglines and overall reliability of each dragline. This study is made to assist engineers to identify the critical and sensitive subsystems in the draglines for better maintenance planning which will lead to enhance equipment availability, reduce the maintenance cost and production loss.