【摘要】 提出磨机大齿轮张口有两种表现形式；分析了每一种张口形式形成原因，宜采取的措施及应注意的事项；针对磨机大齿轮张口，提出两套结构改进方案更多还原

【Abstract】 Two kinds of ex-pression form are put forward in a mill’s gear opening.Through analyzing these openings reasons,some mearures and points are suggested to be taken and to be paid attention;Two sets of structural improving plan are raised for mill’s gear opening in the paper更多还原