Research On Dynamics Simulation Of The Electric Shovel Swing Bearing

The entire working hours of the Electric shovel includes mining, rotating, and unloading. In one of the three circles, rotating time occupy the 60% ~ 75% time of the whole work. Supporting the weight of the equipment and its platform, revolving frame and the excavation work force is the important function of the revolving frame. Revolving frame also has a major role in upgrading and promoting the Bucket pressure, which makes the bucket unloading at the location and makes it turning back to the work place.The characteristics of the Swing Bearing, the developing situation and the application of the status are reviewed based on studying a large number of references. Domestic manufacturers are producing generic Swing Bearing, which are widely used in the small crane and excavators, and other construction machineries. In our country, we usually research on the generic Swing Bearing and it has been very mature. As for medium and large-scale mining excavator's Swing Bearing, there isn't any professional company to product them. But they are designed and manufactured by the excavator manufacturers. So it is necessary to research on the capacity of the Swing Bearing. There are many different forms of the Swing Bearings of the Electric Shovel. And different forms have their own characteristic. They are fit to different machineries. In the working course of Swing Bearing, the roller roll in the roller path in the form of contact-collision, this form of contact-collision has an influence on the whole performance. Therefore analyzing this contact-collision is very important for improving the capability of Swing Bearing. The Electric shovel which is produced by Mechanical Factory of Fushun Mining Group is studied in this paper. We research on its dynamics characteristic by Virtual Prototyping technology; obtaining the contacting force on the roller in the process of rotary movement, the movement time and speed of the revolving frame, the friction moment on the revolving frame. The parameter of the performance for the analysis of the revolving frame is helpful for designing the excavator.This paper uses the mechanical system dynamics simulation software ADAMS to do the performance simulation analysis of the Swing Bearing. Using the 3D modeling software sets the Swing Bearing entity model. The Swing Bearing is not a complex mechanical system. But it is very difficult to obtain accurate simulation results. So we need to analyze it thoroughly, and predigest the resultant reasonably. Of course we should try to maintain the integrity of the Swing Bearing. Through the interface Mechanism /Pro between the ADAMS and Pro/E, the 3D modeling will be transformed into the Virtual Prototype Model, the model will be imposed by the constraints in ADAMS. The contact constraints are imposed between the rollers and the roller path, through the simulation the paper chooses the suitable contact stiffness and selects the most suitable method for calculating the access. Through analysis of the characteristics of the various of method, comparing the advantages and disadvantages of integration scheme, then we choose a more suite algorithm, and simulation the roll movement in the reality environment. In the case of the loaded and the empty, we gained the curves of the rotary velocity and the rotary acceleration. At the same time, in both cases finding the rollers force at the different places. Then through analyzing and comparing the force of the whole rollers summarizes the rule of the roller's contact force in the working time.The paper particularly introduces the application of the Virtual Prototyping Technology in the dynamic simulation of the Swing Bearing, and analyzes the result of the simulation. The main ideas of the paper are as following:â‘ Using the 3D modeling software to establish the models of the Swing Bearing, through the interface Mechanism/Pro between the ADAMS and Pro/E, the 3D modeling is transformed into the Virtual Prototype Model. Setup the parameters of the simulation.â‘¡The paper analyzes and accounts the parameters of the Swing Bearing. We obtained the suitable stiffness and the damping through many experiments, and calculate the time and the velocity at each stage in the state of combing the simulation and according as the theory of the shortest time.â‘¢According to the curve of the contact force, we sum up the rule of the roller contact force in the process of the analysis, and analyze the form of the force.â‘£The paper analyzes the contact force and compares the force at the different location of the rollers and judges the quality center location. We gained the friction moment from the result.In this paper, we provide the simulation result to the analysis of the rotating frame. Manufacturers will understand the deformation and the stress of the revolving frame, and apply the result in the actual production, so this case explains indirectly the feasibility and the practicality of the Swing Bearing simulation. In this paper, the roller plate is different from the traditional forms. The current application of this form of the roll is very small, so compared with relatively little research in this area. But the Swing Bearing occupies a very important position. Analysis the Swing Bearing and measurement the contact force of the roller, which is great significance to optimize the Swing Bearing and the structure of the roller, meanwhile, the study is also of great meaning, which can be cited by the similar equipment.