The Finite Element Analysis Of The Key Components Of FP2500A Type Stack-Turning Machine

With the development of our country agriculture, aquaculture and city, there are more and more crop straws, animal manures, city sludges. We use human and animal manures, crop straws, sludges and other wastes to produce organic fertilizer. It is an important way of efficient utilization of resources. It is also the material foundation of develop organic agriculture. The development of organic fertilizer has attracted worldwide attention. In the production process of organic fertilizer, the production link of the most employment amount and the highest activity-based costing is compost stirring and crushing. Our country is still mainly rely on manual excavator to stirring and crushing, which has poor work quality (mixing uniformity and comminuted difference), low production efficiency, high labor intensity, high operation cost and so on. How to realize mechanized stack-turning and improve the mechanization level of organic fertilizer production is a problem urgent to solve in organic fertilizer production in China.On the basis of analyzing and summarizing the actual state of the FP2500A type stack-turning machine at home and abroad, we study P2500A type stack-turning machine and analysis the whole structure. Establishing the conveying-crushing mechanism device of FP2500A type stack-turning machine in Pro/Engineer, testing the dynamic performance and intensity of the key compoments (scraper, drive sprocket, driving bevel gear and drive shaft) in the environment of ANSYS software.(1)According to soil mechanics experiment, physical parameters of organic fertilizer were studied, including moisture content, wet density, dry density, hardness and shearing strength measurement. According to these datas to guide the FP2500A type stack-turning machine designed.(2)Establishing the conveying-crushing mechanism device of the FP2500A type stack-turning machine in Pro/Engineer, and building the three-dimensional assembly model of the conveying-crushing mechanism device. (3)Using3D modeling software Pro/E built scraper and drive sprocket models, which introduced into finite element analysis software ANSYS to carried on the static analysis. We got stress contour and displacement contour of the scraper and drive sprocket. The analysis results could provide necessary guides for the optimal design of scraper and drive sprocket.(4)By the excellent data exchange interface between Pro/E and ANSYS, the meshing bevel gear was imported into ANSYS and then was transferred into finite element model by meshing. Static contact analysis was executed by using the full Newton-Raphson iterative algorithm.We got tooth root stress and contact stress of bevel gears. The tooth root stress and contact stress of bevel geasr were compared with the ones which are calculated by Hetrzcontact theory.(5)The principle of modal analysis described from the point of view of dynamics. Using ANSYS analysis software to simplified the drive shaft model. Modal analysis of gear pair was carried out using the Block Lanczos to extract the system’s low-order natural frequency and vibration mode.It got ten modes of the drive shaft. It was verified the resonance of the drive shaft would not occur.