目，国内用于1000万至2000万吨级露天矿的大型挖掘机已运行十多年了。无论是国产或合作制造的产品，受恶劣环境、重负荷疲劳的影响，各部件故障增多，急需更换总成件。其中，挖掘机回转齿圈装置作业负荷重、频率高，为关键总成件之一。该装置的运行时间占整台机器作业时间的2／ At present, large-scale excavators used in the 10 million to 20 million tonne opencast mines in China have been in operation for more than 10 years. Whether domestic or co-manufactured products, subject to harsh environments, heavy fatigue, the failure of parts increased, the urgent need to replace the assembly. Among them, excavator rotary ring gear device heavy load, high frequency, as one of the key components. The device’s operation time of the entire machine operating time 2 /