Vertical Roller Mill Grinding Performance And Key Parts Structure Parameter Analysis And Optimization

As everyone knows, the vertical roller mill is widely used in cement industry especially inthe field of raw material producing. Vertical roller mill is high grinding efficiency but lowenergy consumption machine， has excellent performance in system stability and reliability.With the strong drying performance, simple process, little wear, easy to operate and some othersignificant advantage, it is in the good graces of many cement enterprises. In the contemporary,energy-saving emission reduction has become an important task of China’s industrialdevelopment. In response to the call of national,"improve resource utilization, overcome themain energy field", the cement enterprises begin improve the vertical roller mill in order toreduce energy consumption, improve economic benefits and improve the quality of theenvironment at the same time. Vertical roller mill works with vibration and wear of parts lead topoor quality of the product. Therefore, it is necessary to take further dynamic analysis,simulation and optimization on the key parts of the system to reduce the vibration and abrasionPaper design experimental study vertical mill grinding performance based on themechanism of vertical grinding mill. Experiments found that, along with the roller numberincrease, gradually stabilized fine powder content in the material bed, grinding efficiencygradually reduce with the increase of the number of roller. The main reason is that the finepowder content too high grinding occurred easily, affect the grinding performance, need to setthe appropriate volume, wind speed, will be brought out powder, ensure the grinding efficiency,improve energy efficiency. Experiments of grinding process on the grinding performance ofimpact study, find out the influence law of process parameters on grinding performance,obtained reasonable process parameters, improve the grinding performance.Then take the dynamic analysis of main components of the hydraulic pressure system forvertical roller mill，according to the dynamic theory. In the course of vibration，the lowestnatural frequency parts take the main effect on the dynamic characteristics of the system, inorder to get the main natural frequency of the components of the vibration characteristics, needto carry out modal analysis. Through the results of analysis, the roller-shaft and bracket affectthe dynamic characteristics and dynamic performance of the whole hydraulic pressure systemgreatly，to improve the dynamic performance of hydraulic pressure system, it is necessary to improve the natural frequency of roller-shaft and bracket. Then according to the analysis, withthe results of modal, take harmonic response analysis and get the frequency range of thepossible resonance, and provides the reliable theoretical basis for avoiding the resonancephenomenon, and verify whether the structure can withstand the destruction caused byresonance.As the core part of the vertical roller mill, the vibration and wear of roller mill and grinderwill directly affect the grinding performance. In the multi-body dynamics analysis, flexiblebodies have a great impact on the system. This thesis carries on the analysis of multi-bodydynamics in the establishment virtual prototype of grinding system and import the Modalneutral file to build flexible grinder in the. By comparing the analysis result，get the effects ofthe flexible part in the rigid-flexible coupling system. Owing to the deformation of the flexiblebody, it increases the fluctuation and impact load caused by the system vibrate. It is more in linewith the actual working conditions. Therefore, build the rigid-flexible coupling system ofvertical roller mill, establishes the optimization model, take the less mass as target, optimize thegrinder to get the minimum mass but tally to the required allowable stress deformation andother constraints, effectively reducing the vertical roller mill grinding system production cost.Through the dynamic analysis and simulation of the vertical roller mill grinding system, itis probably to improve the stability of the machine, reduce the wear of the key parts anddecreased the energy consumption cost.