Research On Dynamic Characteristics Of A New Vibrating Screen Based On Virtual Prototyping Technology

The vibrating screen is a large number of materials to filter hierarchical processing machinery and equipment. In the industrial sector, especially in the coal mining industry, vibrating screen main purpose is to desliming, dehydration and classification of the product. According to the characteristics of the coal itself is content water and mud, uneven mud particle shape, also is not conducive to the screening. New vibrating screen adopt single driver generate dual vibration principle, making sieve continuous expansion and contraction, thereby obtaining a high acceleration, and to prevent clogging of the sieve. So in new vibrating screen research and improvement stage, its dynamic characteristics should be obtained.The most important member of the shaker is sieve. The sieve is an important component of connecting to the drive unit and the floating screen. The centrifugal force of the drive member driving the vibration sieve vibration, the sieve driving the floating body vibration sieve for the higher frequency vibrations. Therefore, the screening body is not only the support member, but also the transmission member. In the normal shaker operating process, in the running for a period of time there will be a fixed beam or side cracks, these failures instructions the sieve during operation reliability is not strong, the general reliability approach is to increase the structure parts and quality, to ensure the reliability, but consume a lot of unnecessary energy consumption. So part of the needs analysis focuses on the dynamic analysis of the vibrating screen sieve. The issues in an new vibrating screen as the research object, the application of the finite element software ANSYS and multi-body dynamics software Adams to do the work of the following aspects:First, by reference to relevant literature and research findings shaker at home and abroad to develop the status and trends, as well as research in the literature shaker dynamic characteristics using different methods. Then the issue is the major content. In software Pro/E creates three-dimensional model of high efficiency vibrating screen, and elaborates on the principle of high efficiency vibrating screen, some parameters and model assumptions and calculations; and then through a dedicated interface to import finite element software, the model is simplified mesh finite element model to simulate each component, select the appropriate unit in the cell library, meshing issues are discussed. Then applied to the previously calculated load parameters sieve, sieve boundary conditions set for static analysis, view the key components of the deformation diagrams and stress cloud, to provide a basis for the improvement of the structure; modal analysis is carried out on the drive components, natural frequency and mode shapes of the drive components, and provide the basis for the selection and commissioning of the exciter parameters. Next, followed by the sieve modal analysis and harmonic response analysis and transient dynamic analysis, view the natural frequency and mode shapes of the sieve, as well as the response of the structure under different loads incentives.Finally, in multi-body dynamics software ADAMS New vibrating screen model parameters were discussed, mainly the number of spring of the sieve analysis of the number of different spring and floating screen up and down, left and right, as well as before and after six direction of vibration displacement curve and acceleration curve, comparative analysis of the role and influence of the number of spring. And, the kinetic analysis are summarized, and puts forward the lack of work and the further research work.