Design And Study Of Multidimensional Shavings Swinging Screen

At present,the wood processing field mainly adopts swinging sieves to screen shaving particles.However,due to the analysis of the factors affecting the structural design and screening efficiency of swinging screens by scholars at home and abroad,the existing swinging screens are simple in movement and low in work efficiency.Therefore,in order to solve the above problems,the paper uses EDEM software to find that the optimal screening mode of the multi-dimensional shavings oscillating screen is the X/Z direction two-degree-of-freedom excitation mode;based on the mechanism topology theory,a new kind of two-degree-of-freedom shavings is designed.Sieve;using ADAMS,ANSYS and other software,its kinematics,modality and fatigue strength analysis.The specific research work and conclusions are as follows:Based on the discrete element method,using the EDEM simulation software,through the control variable method and the orthogonal test,the vibration frequency,the amplitude of vibration,the angle of the sieve surface and the excitation mode on the screening effect are studied,and the influence of various factors on the performance of the oscillating sieves under different conditions is observed.It is found that the main and secondary factors affecting the efficiency of particle sieving are the mode of excitation,the amplitude of vibration,the frequency of vibration and the angle of the sieve surface.At the same time,the best working parameters of the multidimensional shaving screen are combined to be the two degree of freedom excitation mode of selecting X/Z direction,the vibration frequency is 7Hz,the vibration amplitude is 11mm,and the angle of the sieve surface is 3 degrees..Based on the theory of mechanism topology,a new type of parallel mechanism,4-SOC{R | P(丄R)丄R(丄R)} is designed as the main vibration mechanism of a new two degree of freedom shavings swing screen.Based on this mechanism,the whole structure of a new two degree of freedom shaving screen is designed by using PROE 3D modeling software.The screen frame can simultaneously produce rotary oscillating and vertical reciprocating vibration,thus effectively improving the processing quantity and screening efficiency of screen material screening operation.Based on the TRIZ theory,the causality axis analysis is carried out on the problems of the eccentricity of the eccentricity axis of the shavings swinging screen,the limited adjustment range of the eccentricity adjusting device and the fracture of the rubber spring easily.The corresponding innovation principle is found through the search.of the contradiction matrix table,and the structural optimization design is carried out in combination with the actual working situation,and the above mentioned above has been solved.The problem.In order to verify the feasibility of the design of the two degree of freedom shavings oscillating screen mechanism,based on the theory of multi rigid body system dynamics,the kinematic analysis of the swinging sieves is carried out by ADAMS simulation software,and the curves of the displacement and velocity of the X direction,the direction of Y and the direction of the Z under the different variables are drawn.It is proved that the two synchronous reverse vibrations are used.The feasibility and rationality of the concept of Z to the mobile excitation mode are replaced by the rotation of the motor.Based on the finite element theory,the ANSYS software is used to analyze the modal and fatigue strength of the key parts of the two degree of freedom shaving screen.It is found that the resonance phenomena in the normal work can be avoided effectively,and the key components,such as the eccentric axis and the universal joint,are found after the fatigue strength analysis of the key parts.The design accords with the actual work demand,and verifies the rationality of the structural design of the two degree of freedom shaving swing screen.