综采作业中液压支架推移机构受力分析及连接件过载保护设计

Powered Support Advancing Mechanism Over-load Protection and Connecting Element Stress Analysis

针对液压支架推移机构在工作中的受力状况以及连接件的过载保护问题进行研究,采用剪切应力安全销轴避免推移机构过载冲击带来的部件损坏现象并构建数字化模型,并对模型参数进行设计和分析,从机械和液压2个方面重点解决在拉架瞬间启动以及冲击载荷对系统主零件的破坏问题。

The research aimed on the question of over-load protection of the powered support＇s pushing mechanism on the basis of this a protective mechanism called stress shearing safety bolt-pin or over-load stress bolt-pin is put forward. This is accompanied by the provision of a digital model and design of parameters for the stress sheafing safety bolt-pin. As for the damages to the main parts of the pushing mechanism of the powered supports due to the starts and impulsive force of the advancing mechanism of the hydraulic supports, both mechanical solution and hydraulic solution are provided.