Dynamic Simulation And Mechanics Research Of Contact-Wedge-Backstop Based On Virtual Prototyping Technology

Backstop is one kind of devices to prevent a reversal, mainly uses in elevating machines, such as belt conveyor and so on. When the belt conveyor stops running due to manual control or accidents, backstop can be used to prevent the equipment reversal which caused by the weight of belt and goods themselves, thus guarantees the security of operators and equipment. The structure of backstop is relatively complex, the cost of equipment is high; the backstop requires strict reliability, its design standards related to the final product quality.Virtual Prototyping Technology is a new designing method, it is a digital designing method based on the simulated models of the products. According to Virtual Prototyping Technology, in the earlier time of the designing, the designers, users and manufactures can do modifications, characteristics testing, virtual manufactures on the simulated models of the product in the virtual environment. This is very important to the enlightenment of innovation designing, improvement of the designing quality, reducing of the designing errors and shortening of the designing time.This paper applies the Virtual Prototyping Technology to the designing of the backstop for solving the problems in the traditional designing, which is longer designing time and higher cost of prototype for test. Under the premise of theoretical design, the Contact-Wedge-Backstop is studied with collaborative simulation of several foreign high-tech software, such as 3D parametric feature-based modeling software-Pro/E, mechanical dynamics simulation software-ADAMS and finite element analysis software-ANSYS. First, its 3D parametric model and assembly is built up with Pro/E, then the interference test confirms the model accuracy. Second, the dynamics analysis of the backstop under actual working conditions provides some data, such as the resistance torque in the state of normal revolving, and the force of wedge in the state of backstop, which is the boundary condition for FEA. Based on the boundary condition, this paper uses ANSYS to do the finite element statics analysis for the key component of the backstop-wedge, checks its intensity, and confirms the theoretical design parameter rationality.The method and system used in this paper can also be used in other mechanicalproducts.