Study On The Super Roller Type Supporting Structure

With the prosperity of social economy and the development of science and technology, the application of the super rotary supporting structure becomes more and more in the domains like machine, architecture, and so on, the demand to its performance becomes higher and higher. The traditional scheme of the rotary supporting structure is the"bearing type", but it has some disadvantages, such as:high precision of manufacture, difficult to produce; huge volume, difficult to transport; difficult to assemble and adjust; difficult to maintain, and so on. In this paper, aiming at the project requirement of the Cihai Bridge Giant wheel, the"roller type"supporting structure is proposed, its concrete structure and design method is studied systemically. The content of this paper is:1. Analyzing the demand of Cihai Bridge Giant wheel's rotary supporting structure and other problems which must be considered in the product life circle, the"bearing type"and the"roller type"supporting structures are proposed, the"roller type"supporting structure, which is thought to be the most rational scheme, is chosen finally by comparing the advantages and disadvantages of two schemes, and then the particular structure of the"roller type"supporting structure is designed.2. Taking the least weight as the optimized object, focusing on the demand of the project, the restriction of the structure and the intensity, some constraints are confirmed, and then the optimized model is set up and calculated with Matlab.3. The stress and strain of supporting outer ring and bracket of the roller, the key parts of the supporting structure, are analyzed with Finite Element Theory and ANSYS, the result indicates that the design is rational.4. The contact pressure of the roller and the supporting outer ring is calculated with ANSYS and Hertz Theory at the same time, the calculated result indicates that it is practical to calculate the contact pressure with Finite Element Method.5. Focusing on the applied demand of the supporting structure of the giant wheel, the demands of manufacture and assembly are proposed, at the same time, the adjustment methods of the concentricity of the two supporting outer rings, the radial dimension and the radial angular dimension are clarified.The"roller type"supporting structure which is proposed in this paper aims at the Cihai Bridge Giant wheel project, however, its structure and the design methods are valued and can offer some suggestions to the design of other super rotary supporting structure.