３．１×７８ｍ回转窑第一档托轮，公称尺寸１０００×６５０（ｍｍ），材质ＺＧ３５。托轮原为双幅板结构，铸件工艺质量约为２５２０ｋｇ，经长期使用，轮缘部（厚度δ＝９０ｍｍ）有变形及开裂图１　托轮零件图现象，造成异常失效；现用户将托轮断面修改成实心体，保留  3.1 × 78m rotary kiln first gear, nominal size  1000 × 650 (mm), material ZG35. The original quality of the castings is about 2520kg. After long-term use, the flanges (with a thickness of δ = 90mm) are deformed and cracked. Modified into a solid body, reserved