The rolling bearing was an important part of the mining machine. Once the damage and maintenance was difficult, it will seriously affect the working efficiency of the mining machine.Based on the reliability analysis project of a coal mining machine, the lubrication performance of the output bearing of rocker arm was studied.Of thin seam coal winning machine developed by the project team get force curve of coal winning machine load simulator, based on the theory of Hertz contact mechanics study of cylindrical roller bearing contact state of low speed and heavy loading, on the basis of the contact behavior simulation, add the bearing oil film, through the establishment of bearing hydrodynamic lubrication theory and fluid-structure coupled model of oil film were analyzed, and the oil film thickness is obtained by analyzing the results of processing, the oil film pressure, film velocity and changes of the bearing parts contact.The fluid-solid coupling method is applied to the contact analysis of low-speed heavy-duty bearing, which provides a new method to study the contact problem of coal mining machine bearing.
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