Research On Static And Dynamic Characteristics Of Mobile Biomass Crusher

With the emergence of energy problems,environment pollution and greenhouse effect,the biomass power generation has been widely use and it is better to alleviate the current environmental issues.China has also increased the development of biological quality and input for this problem.Crops straw,mountain forest,abandoned branches has the characteristics of high biomass yield,wide distribution,many varieties,and there needs to be broken to get further development and utilization,and fracturing technology and related equipment play a key role.Facing material distribution and the development of crushing equipment,it is difficult to complete the brushwood on the broken.At the same time,the cost of transportation problem also limits the development of biomass.The emergence of mobile biomass crusher has greatly improved the efficiency of biomass crushing and reduced the development cost.In this paper,the author studies on crushing machine for the mobile biomass crusher.Compared with the stationary crushing machinery,the breaker has light weight,small volume,and it is not subject to regional restriction,and can be broken on the spot.Besides,the main shaft is equipped with six long cutting tools,and high crushing efficiency and high safety factor.First,based on field measurement of mobile crusher biomass size,it can create entities on the machine model,and then according to the theory of equivalent stiffness on the whole machine model equivalent simplification,the subsequent analysis model is established.The analyzing of the forced state of a stationary tool in the theory and the general calculation formula of cutting force is obtained,then according to the Angle of the bottom of the fixed knife,calculated the component on each axis;According to the interaction force and distribution law between rotor and pin shaft during operation period.Through simulation tool,the stress and strain state of the spindle knife roller and the whole frame are analyzed andcalculated,and the rationality of the design of the raw material crusher is further verified.Secondly,the dynamic characteristics of the crusher are studied from the modal analysis of the frame and the main shaft cutter roller,and the vibration characteristics of the engine under the engine excitation.In the process of research,the modal analysis of the rack and spindle blade roller is carried out,so that the natural frequencies and modes of the key parts of the crusher are more clearly understood.And then to the modal analysis results for reference,setting vibration frequency range of harmonic response analysis and measurement point,and the engine under the horizontal and vertical vibration,the harmonic response analysis,according to the analysis results view frame whether produce resonance,and provides a direction and basis for the optimization of late.Again,using the Adams software to crusher for the dynamic balance of rotor assembly simulation,studied the whole process from start to stable operation,according to the center of mass of rotor vibration wave curve and the axial vibration wave curve of rotor assembly center of mass is given less volatile and smooth operation,main shaft bearing load in good condition on both ends meet the conditions,the overall structure of dynamic balance.Finally,the multi-objective optimization analysis method is adopted to optimize the frame of the second order natural frequency,in as much as possible to ensure reasonable material selection quality under the condition of small size in order to improve the second order modal frequencies,in order to avoid the body resonance in under the engine idle speed,ensure the stability of the body.