The Design And Analysis Of The Virtual Prototyping Of Cleaning Machine Excavate Amplitude Mechanism

With the constant speeding of railway rolling stock, the requirements of the mechanization degree of track maintenance are increasing.Turnout cleaning machine is a new kind of cleaning machine which is independent researched and developed by some a company and used for excavating and cleaning ballast of railway turnout mining. In the research and development process of turnout cleaning machine, the application of virtual prototyping which instead of physical prototyping for experiment is significant to shorten the product development cycle, reduce development costs, improve design quality, product performance improvement and so on.After the analysis on the abroad research status of cleaning machine and the theory of virtual prototyping, the paper regards the turnout cleaning machine excavate amplitude mechanism designed by some a company as research object, focus on the small excavate width of physical prototyping in field trials, the "seizure" phenomenon of hydraulic cylinder in the working process, the so-called "dead center"issues to design, analyse and research. Firstly, we analyse the company's preliminary design of the turnout cleaning machine excavate amplitude mechanism in three-dimensional software Solid Edge, and then we design three kinds of cylinder layout program, and choose out a better program after the analysis of stress and the comparison. Secondly, we amplitude the three-dimensional model transformation of the excavate amplitude mechanism which is re-assembled with the selected program in a variety of typical conditions, obtain the required cylinder parameters of hinge point location, itinerary, minimum installation distance, oil pressure, cylinder bore and so on, selected out the hydraulic cylinder models. In order to verify the correctness and rationality of the design, we build a virtual prototyping model of the turnout cleaning machine excavate amplitude mechanism in the virtual prototyping simulation software ADAMS, and analyse its kinematics and dynamics. With the kinematic simulation, we know that the hydraulic cylinder doesn't have the "seizure"phenomenon, the itinerary can meet the requirements of excavating width, height and clearance, and there is no motion interference between the various components. Through the dynamic simulation of agencies in two typical operating conditions, we obtain that the push and pull tension provided by hydraulic cylinder can overcome the guide channel strapping tension in the bottom surface of sleeper provided by the work of digger chain; the force of hydraulic cylinder in the most adverse stress conditions is less than the rated push and pull tension; enhance the fuel tank can bring the whole mining equipment when the up guide channel work in the expanded state. And then we verify the correctness and rationality of the design, and solve the problems in the original design. In addition, for checking the stiffness, strength of the down guide channel can meet the job requirements or not, we analyse and calculate them in large general-purpose finite element software ANSYS, and then we know that except a small number of the local office, the stiffness and strength are basically meet the requirements, and we can solve the problem through the addition of reinforcing.In the paper, we apply the advanced technologies of three-dimensional design; virtual prototyping and finite element analysis to design, analyse and research the turnout cleaning machine excavate amplitude mechanism, and achieve the expected results. The design program and simulation results are approved and adopt by the company. The research of the paper provides a new effective method for the design and testing of turnout cleaning machine excavate amplitude mechanism and similar institutions, and the method has great reference and engineering value.