The Design Of New Friction Coupling And Finite Lement Analysis

Mechanical equipment, particularly coal mining machinery equipment often start and operate with the load, therefore, it need to have a "soft start" of the operating characteristics. The "soft start"' feature of equipment is that the device which can be controlled to gradually overcome the inertia of the system starts smoothly under the overload condition. It is not only can greatly reduce the transmission system impact of the start, but also greatly reducing the motor starting current and the thermal shock load on the motor and the impact on the electricity net. In addition, you can also use relatively smaller capacity motor, which can reduce unnecessary investment in equipment and save a lot of energy. Shandong University of Science and Technology and Ruize Electrical Equipment Co., Ltd. have jointly developed a new type of friction coupling. Compared with the original friction coupling, this product has its own salient features:With the output shaft speed feedback control the output torque; overload coefficient increases with the output shaft speed'square, effective soft-start; the process of start is very smooth; when the machinery is rotating in the normal state, there is no sliding; mechanical efficiency is high, to ensure that master and slave device has a highly efficient transmission. New type friction coupling device is a good compatibility of soft start equipment. It is not only simple, easy to use and maintenance, but also has low cost, reliable performance, and small size.This paper develops friction coupling's principle of feedback control. According to the principle, design a new 90KW friction coupling's structure. Calculate the active and the feedback friction program. Design the structure of the key components and use the Pro/E software to draw theirs three-dimensional models. Then create the dynamic differential equations that friction coupling starts with load. Analyze the starting process with load briefly. The overall structure of the friction coupling' input shaft is more complex, and is difficult to use traditional mechanical methods to analysis. In this paper, finite element analysis software ANSYS and HyperMesh which are very popular in the international are used to analyze the input shaft, and check the strength and stiffness of this part. Analyze the modal of the input shaft to understand the inherent vibration characteristics. Last, use OptiStruct to optimize the input shaft, it can effectively reduce the weight of the part, and save a lot of material. Thus enabling the design has good feasibility and practicality, and is a very good guide to other similar products. The main innovation of the paper are:Feedback control principle of the new friction coupling is proposed; Establishing the dynamic analysis equations of the friction coupling starting with load; Optimize the key components of the new friction coupling.