Research On Key Components Of Stabilized Soil Vibration Mixer

"Made in China 2025" puts forward higher requirements for China’s road construction machinery industry which is both an opportunity and a challenge.To achieve industrial upgrading and innovation transformation is the necessary way to a strong manufacturing country.Nowadays,China’s road construction machinery industry has a huge scale,in which the production and sales of mixing equipment products have leaped to the first place in the world.Many domestic companies have their own core technology,and new products are coming out in an unending flow.The double horizontal shafts stabilized soil vibration mixer is a new type of mixing equipment developed in recent years.The application of vibration mixing technology in this equipment can effectively improve the inherent mixing inefficient zone of the former mixing equipment.And the homogeneity of stabilized soil produced is better,which can reduce the appearance of cracks in the road base in our country.However,due to the addition of vibration,the stabilized soil vibration mixer will be subjected to more impact loads in the process of working.It is urgent for us to study and solve the problem of improving and optimizing the performance of key components of the mixer.In this paper,DT600t/h double horizontal shafts stabilized soil vibration mixer is taken as the research object,and its key components are studied in order to solve the problems existing in the actual work of the mixer.The main contents are as follows:Firstly,the vibration test of the stirring shaft,the stirring blade and the frame of the mixer was carried out.And the vibration acceleration data of the key components under different vibration conditions were obtained.After analysis and post-processing,the vibration modals of the mixer under excitation and the position distribution of thevibration intensity on the frame were obtained.Secondly,the vibration characteristics of mixer are analyzed by finite element method.Through modal analysis,the first five natural frequencies and modal modes of the stirring device are obtained,and the resonance of the stirring device under excitation will not happen.Through the static analysis,the stress and deformation of the mixer under the normal working condition and under the loading condition are obtained.Through transient analysis,the influence of different combination of vibration parameters on the amplitude distribution of agitator is obtained,which provides a theoretical basis for reasonable selection of vibration parameters.Then,aiming at the problem of severe shaking of the frame when the mixer is working,the modal analysis and static analysis of the mixer’s frame are carried out.It is found that although the frame meets the stiffness requirement,its first natural frequency is close to the excitation frequency of the high speed shaft exciter of the mixer,which results in sloshing.Finally,based on the stiffness analysis of the frame,the dynamic optimization design of the frame is carried out by multi-objective optimization method.And the modal analysis and static analysis of the optimized frame are carried out.Compared with the original frame,the results show that the first natural frequency of the optimized frame is obviously increased and the deformation is reduced,The resonance phenomenon of frame is effectively avoided and the stiffness is improved.