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为研究采煤机摇臂惰轮轴疲劳寿命,建立惰轮传动系统动力学模型,分析惰轮轴载荷特性;利用自主研制的惰轮轴载荷测试系统,通过无线应变模块采集测试数据,获得采煤机斜切进刀时摇臂惰轮轴载荷;运用斜切截割最大载荷研究惰轮轴疲劳寿命。研究结果表明:采煤机斜切工况下,惰轮轴X向的最大载荷为33.90 k N,Y向最大载荷为35.83 k N,惰轮轴固定轴承的两个端面处应力最大,最先发生疲劳破坏的位置在固定两个轴承的轴肩处。研究结果为摇臂惰轮轴实时载荷测试提供了新方法,为采煤机摇臂结构载荷和力学特性研究提供理论依据。
In order to study the fatigue life of the idler shaft of the shearer rocker, the dynamic model of the idler gear transmission system is established and the load characteristics of the idler shaft are analyzed. With the self-developed idler axle load test system, the test data are acquired through the wireless strain module, Cutting the idler shaft of the rocker when cutting into the knife; Studying the fatigue life of the idler shaft with the maximum load of the miter cutting. The results show that the maximum load of the idler shaft in the X direction is 33.90 kN and the maximum load in the Y direction is 35.83 kN in the chamfering condition of the shearer. The stress on the two end faces of the idler shaft bearing is the largest and fatigue occurs first The location of the damage is at the shoulders of the two bearings. The research results provide a new method for the real-time load testing of rocker idler shaft, which provides a theoretical basis for the research on the load and mechanical properties of the rocker arm.