锤片式粉碎机转子系统的模态分析
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摘要
为了研究锤片式粉碎机在启动过程中转子的动态响应规律,利用ANSYS软件对粉碎机转子系统进行模态分析,得到了转子部分的前六阶模态振型,并根据模态振型的固有频率得出了转子系统的前六阶临界转速。结果表明转子部分的第二阶临界转速在额定转速范围内,因此粉碎机在工作时应尽量避开这个转速;测得转子部分在不同支承刚度条件下前三阶振型的固有频率和最大相对位移,分析了前三阶振型的固有频率和最大相对位移随支承刚度的变化规律,认为转子系统应使用支承刚度较小的滚动轴承。研究为锤片式粉碎机转子组的动态特性分析和减振降噪设计提供了理论依据。
In order to study the dynamic response law of the rotor of the hammer mill during start-up process, the modal analysis has been carried out to the rotor system by ANSYS software, and the first six-order mode shape of the rotor part has been obtained. The first six critical speed of the rotor system has been given according to the natural frequency of the modal shape. The results show that the second-order critical speed of the rotor part is within the rated speed range. Therefore, the mill should avoid this speed when working. The natural frequency and maximum relative displacement of the first three-order mode have been measured under different support stiffness conditions. The changing law of natural frequency and the maximum relative displacement of the first three modes with variation of support stiffness has been analyzed. It is considered that the rotor system should use rolling bearings with less support stiffness. It provides a theoretical basis for the dynamic characteristics analysis and the design of vibration and noise reduction of the rotor group of the hammer mill.
In order to study the dynamic response law of the rotor of the hammer mill during start-up process, the modal analysis has been carried out to the rotor system by ANSYS software, and the first six-order mode shape of the rotor part has been obtained. The first six critical speed of the rotor system has been given according to the natural frequency of the modal shape. The results show that the second-order critical speed of the rotor part is within the rated speed range. Therefore, the mill should avoid this speed when working. The natural frequency and maximum relative displacement of the first three-order mode have been measured under different support stiffness conditions. The changing law of natural frequency and the maximum relative displacement of the first three modes with variation of support stiffness has been analyzed. It is considered that the rotor system should use rolling bearings with less support stiffness. It provides a theoretical basis for the dynamic characteristics analysis and the design of vibration and noise reduction of the rotor group of the hammer mill.
引文
[1]曹丽英.新型锤片式粉碎机物料分离特性的模拟与测试分析[D].呼和浩特:内蒙古农业大学,2010.
[2]李燕燕.锤片式粉碎机筛网结构设计与实验研究[D].包头:内蒙古科技大学,2015.
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[4]张跃鹏.新型锤片式粉碎机的噪声源识别[D].包头:内蒙古科技大学,2016.
[5]储荣邦,吴双成,王宗雄.噪声的危害与防治[J].电镀与涂饰,2013,(12):52-57.
[6]叶红卫,栾昌才.论噪声危害的潜在性与致命性[J].工业安全与防尘,1995,(8):28-30.
[7]刘静民.城市环境噪声污染与控制措施探讨[J].中国高新技术企业,2016,(7):76-77.
[8]Nelson H D,Mcvaugh J M.The dynamics of rotor-bearing systems using finite elements[J].ASME Journal of Engineering for Industry98,1976,2:593-600.
[9]Genta G,Brusa E.Rotor Dynamics Analysis in the Design of Rotating Machinery[J].Pretoria:International Workshop on Multidisciplinary Design Optimization.2000,8:8-10.
[10]Bachschmid N,Pennacchi P,Vania A,etal.Case Studies of Fault Identification in Power Plant Large Rotating Machinery[J].Sydey:6th IFTo MM-Conference on Rotor Dynamics,2002:171.
[11]周亚武.汽轮机转子有限元建模及动力学分析[D].武汉:华中科技大学,2009.
[12]殷勍.基于ANSYS的涡轮增压器转子系统动力学特性研究[D].太原:中北大学,2014.
[13]黄志伟.基于非线性转子动力学的水轮发电机组振动机理研究[D].武汉:华中科技大学,2011.
[14]秦然,张建伟.转子临界转速的求解方法比较[J].沈阳化工学院学报,2007,(1):74-76+80.
[15]曹丽英.一种循环筛分式粉碎机[P].中国:201207358752,2012-12-18.
[2]李燕燕.锤片式粉碎机筛网结构设计与实验研究[D].包头:内蒙古科技大学,2015.
[3]武珮,柏大棨.爪式粉碎机噪声源的识别分析[J].农业机械学报,1990,(3):61-66.
[4]张跃鹏.新型锤片式粉碎机的噪声源识别[D].包头:内蒙古科技大学,2016.
[5]储荣邦,吴双成,王宗雄.噪声的危害与防治[J].电镀与涂饰,2013,(12):52-57.
[6]叶红卫,栾昌才.论噪声危害的潜在性与致命性[J].工业安全与防尘,1995,(8):28-30.
[7]刘静民.城市环境噪声污染与控制措施探讨[J].中国高新技术企业,2016,(7):76-77.
[8]Nelson H D,Mcvaugh J M.The dynamics of rotor-bearing systems using finite elements[J].ASME Journal of Engineering for Industry98,1976,2:593-600.
[9]Genta G,Brusa E.Rotor Dynamics Analysis in the Design of Rotating Machinery[J].Pretoria:International Workshop on Multidisciplinary Design Optimization.2000,8:8-10.
[10]Bachschmid N,Pennacchi P,Vania A,etal.Case Studies of Fault Identification in Power Plant Large Rotating Machinery[J].Sydey:6th IFTo MM-Conference on Rotor Dynamics,2002:171.
[11]周亚武.汽轮机转子有限元建模及动力学分析[D].武汉:华中科技大学,2009.
[12]殷勍.基于ANSYS的涡轮增压器转子系统动力学特性研究[D].太原:中北大学,2014.
[13]黄志伟.基于非线性转子动力学的水轮发电机组振动机理研究[D].武汉:华中科技大学,2011.
[14]秦然,张建伟.转子临界转速的求解方法比较[J].沈阳化工学院学报,2007,(1):74-76+80.
[15]曹丽英.一种循环筛分式粉碎机[P].中国:201207358752,2012-12-18.