Dynamic Analysis of the Rotor of A Kitchen Blender Based on the Concentrated Mass Method
Based on the rotor dynamic analysis of a prototype of a kitchen blender of a company,a model of the rotor system of the kitchen blender is established by using the lumped mass method,and modal analysis,critical speed analysis and harmonic response analysis are carried out.The main conclusions are as follows:First,in the aspect of modal analysis,the first four forward precession vortex frequencies and corresponding vibration modes of the rotor system of the kitchen blender are obtained,and the natural frequencies are 867.93 Hz,10 394 Hz,11 434 Hz and 12 673 hz respectively.The positive precession mode is mainly characterized by the swing with the bearing support as the fulcrum,which can provide a useful reference for the structural design and improvement of the kitchen blender system.Secondly,in terms of critical speed analysis,the results show that the critical speed of the rotor system of the kitchen blender is 17 252 r/min,which is far lower than the rated speed of 35 000 r/min.This finding means that the kitchen blender can run stably at the rated speed without resonance,and the reliability and stability of the system are ensured.Finally,in terms of harmonic response analysis,with the connecting disc with the largest deformation of rotor system as the research object,the calculation results show that the deformation reaches the peak value at 12 600 Hz,which is consistent with the conclusions of modal analysis.Through the above analysis,this paper studies the rotor dynamic characteristics of the kitchen blender,which provides a basis for the research and development and optimization of the kitchen blender.
kitchen blenderbearingsconcentrated mass methodrotor dynamics
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