我单位疏浚河道工程船舶——西湖二号挖泥船,大齿轮是铸铁件,直径1462mm,齿长150mm,齿高55mm,总齿数70。在生产施工中因意外故障从根部爆断二只半齿,需要焊补。由于挖泥船生产是在野外施工,大齿轮又重、又大,吊拆又无起 My unit dredging river works ship - West Lake No. 2 dredger, the big gear is cast iron, diameter 1462mm, tooth length 150mm, tooth height 55mm, the total number of teeth 70. Blasting two halves from the root due to accidental failure in production and construction, welding repair is required. As the dredger production is in the field construction, gear heavy, large, lifting and no more