Research On Automatic Spraying Of Lubricant On Pressure Surface Of Aircraft Engine Fan Blade

During the flight task,the pressure surface of the fan blade of the aircraft engine suffers from severe wear and tear,so it is necessary to spray lubricant regularly.Manual spraying has low efficiency,poor working environment and low degree of automation.In order to realize the lubricant auto-spraying operation on the pressure surface of the blade root of aircraft engine in maintenance,the aim of this paper is to establish the spraying model of the fan blade pressure surface,to study the uniformity of the coating,and to plan the spraying path according to the uniformity of the coating,and finally to realize the design of the lubricant atomization system and the robot body system.According to the surface structure characteristics of the pressure surface of the fan blade of an aircraft engine,the surface of the fan blade can be divided into two parts: plane surface and surface surface surface.Therefore,a plane spraying model is established,and a parabolic model is proposed to study the cumulative thickness of the coating.The overlap width of the plane spraying trajectory is theoretically analyzed and simulated,and then the control optimization of the plane spraying path is realized.Then,the parabolic model is transformed into the coordinate system,and the surface spraying model is established on this basis.At the same time,the uniformity of surface coatings is studied,and the average relative deviation function of surface coatings thickness is established.The simulation analysis of surface coatings uniformity control is carried out by using the average relative deviation function of coating thickness as the uniformity function of surface spraying.Finally,the path of surface spraying is planned by using the results of surface coatings uniformity analysis.Thirdly,according to the existing spraying technology,combined with the actual spraying lubrication requirements of aircraft engine fan blade pressure surface,air spraying is determined as the spraying technology of aircraft engine fan pressure surface lubrication.At the same time,the lubricant spraying atomization system is studied,the structure design of the lubricant spraying atomization system is given,and the hardware selection is introduced.The platform of the lubricant spraying system is built and spraying experiments are carried out,which lays a foundation for the realization of the actual automatic spraying operation.Finally,the structure and control system design of the spraying robot are studied.According to the actual needs,a six-degree-of-freedom serial robot is selected as the executing mechanism of lubricant automatic spraying.The forward and inverse kinematics solutions are analyzed,and the motion control and spraying trajectory of the robot are simulated and realized.