Structure Design And Dynamic Analysis Of Petroleum ZJS12 Vibrating Screen

Linear shale shaker mainly undertake removing large amounts of larger debris for the most important and basic equipment of drilling fluid solid control. In generally, linear shale shaker works in the open oil drilling field. Its working conditions are very bad. During high frequency working process, its plates and beams are difficult to escape from cracking. Screen also bears larger alternating exciting force, gravity and impact force from screening material for a long time. Because of this, shorter service life, lager resonance amplitude and bigger noise are caused. And, it has a great significance to reduce stress level and eliminate stress concentration of vibrating screener for the aim to improve its working reliability and extend the life-span.This paper is taking ZJS12drilling shaker jointly developed by Yangzhou University and Yangzhou Chicheng Petroleum Machinery Co., Ltd as research object. Beginning with Danalbo principle and with the theory hydrodynamic lubrication, dynamic performance of the linear shale shaker was analyzed, contra-posing the main problems of cracked from plates and beams. First of all, material movement on screen and vibrating shaker mechanical properties were analyzed and researched based on the working principle of the linear shaker. A three dimensional model of ZJS12drilling shaker which was imported into ANSYS WORKBENCH to mesh, was established in3D software CATIA. During the meshing process, the screen box was simplified first so as to ignore some smaller chamfer, unnecessary process holes and bolt hole. The rods and guard board which was non load-bearing structures and function part were omitted. The modal analysis of finite element model was processed in analysis software ANSYS WORKBENCH next. The first fifteenth natural frequencies and modal shapes were got. The result showed that the work frequency of the vibrating screen was away from its natural frequency and resonance phenomenon wouldn’t happen in normal work condition. Through the experimental modal analysis, the correctness of the theoretical analysis results was verified by comparing the results between the finite element analysis and experiment of drilling shaker. At last, the harmonic response analysis of ZJS12drilling shaker was done by means of finite element analysis software ANSYS WORKBENCH. Distribution rule of all nodes displacement and dynamic stress of the screen box were determined. The biggest stress value which was21.34MPa lower than the allowable stress value of Q235-A24MPa meets the design requirements. Its biggest stress value was reduced to17.36MPa after local improvement. Its displacement varying tendency conformed to the actual situation and the biggest displacement basic meet design requirement.To sum up, this article used finite element analysis and experiment modal analysis design method provided a new analysis method for solving strength of small linear shale shaker. It had an important significance to reduce stress level and eliminate stress concentration of vibrating screener for the aim to improve its working reliability and extend the life-span.