3800轧机主传动系统扭转振动研究
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摘要
论文以湘钢一轧厂主轧线粗轧机组3800可逆轧机主传动系统为研究对象,对轧机主传动系统的动态特性进行了理论分析与实验研究。论文主要研究成果有:
1、本研究首先使用计算机数据采集系统对典型工况下主轧线粗轧机组3800可逆轧机上下轧辊主传动系统的扭矩进行了现场测试,测试各种规格、强度等级钢坯在正常生产下轧机主传动系统扭矩信号,并根据此信号分析系统扭振固有频率及扭矩放大系数。
2、采用集中质量法建立了轧机主传动系统扭转振动模型,用计算机计算出轧机主传动系统的固有频率和振型,并对正常轧制时主传动系统的动力响应进行了仿真分析。掌握了钢坯咬入时间对扭矩放大系数的影响。轧机扭振理论计算与实验结果是相符的。
3、通过对影响主传动系统扭转振动因素分析,找出了加剧轧机主传动扭转振动的主要原因。轧制速度过高,导致咬入时间过短是造成冲击扭矩过大的主要原因。
湘钢一轧厂根据分析结果,采取降低钢坯进入轧机瞬时速度的措施后,设备事故率显著降低,产品产量和质量提高,取得了巨大的经济效益和良好社会效益。
The paper which is based on the analysis of the main drive system of the 3800 reversing mill belong to a roughing mill group in the 1# rolling mill in Xiang Gang focus on the theoretic analysis and experimental investigation of dynamic behavior of the main drive system. Some achievements of the paper are following:
1.With the aid of the system of computer data acquisition, we test the torque of the main drive system of up and down rollers belong to 3800 reversing roll in typical condition including the torque signal of various specifications and grades of strength of billet in normal condition. According with the above tested signal, we analyze the natural frequency of torsional vibration and amplification coefficient of the main drive system.
2. Calculate the natural frequency and mode of the torsional vibration model of the main drive system using lumped mass method. What is more, the simulation analysis the dynamic response of the main drive system in the normal condition is carried out. The influence of the billet biting time on torque amplification coefficient is obtained through above simulation analysis. At the same time, the theoretic calculation consists with the simulation analysis.
3. Investigate the main reason of intensifying the torsional vibration of the main drive system by analyzing the reasons of affect the torsional vibration of the main drive system. The high speed of rolling, resulting in short biting time, is the main reason of causing excessive torque.
According to the analysis, Xiang Gang makes a improvement, decreasing the instantaneous speed when the billet enters the mill, leading the low failure rate of equipments and the improvement of quality and quantity of the product. In brief, the improvement brings enormous economic benefits and social benefits.
1、本研究首先使用计算机数据采集系统对典型工况下主轧线粗轧机组3800可逆轧机上下轧辊主传动系统的扭矩进行了现场测试,测试各种规格、强度等级钢坯在正常生产下轧机主传动系统扭矩信号,并根据此信号分析系统扭振固有频率及扭矩放大系数。
2、采用集中质量法建立了轧机主传动系统扭转振动模型,用计算机计算出轧机主传动系统的固有频率和振型,并对正常轧制时主传动系统的动力响应进行了仿真分析。掌握了钢坯咬入时间对扭矩放大系数的影响。轧机扭振理论计算与实验结果是相符的。
3、通过对影响主传动系统扭转振动因素分析,找出了加剧轧机主传动扭转振动的主要原因。轧制速度过高,导致咬入时间过短是造成冲击扭矩过大的主要原因。
湘钢一轧厂根据分析结果,采取降低钢坯进入轧机瞬时速度的措施后,设备事故率显著降低,产品产量和质量提高,取得了巨大的经济效益和良好社会效益。
The paper which is based on the analysis of the main drive system of the 3800 reversing mill belong to a roughing mill group in the 1# rolling mill in Xiang Gang focus on the theoretic analysis and experimental investigation of dynamic behavior of the main drive system. Some achievements of the paper are following:
1.With the aid of the system of computer data acquisition, we test the torque of the main drive system of up and down rollers belong to 3800 reversing roll in typical condition including the torque signal of various specifications and grades of strength of billet in normal condition. According with the above tested signal, we analyze the natural frequency of torsional vibration and amplification coefficient of the main drive system.
2. Calculate the natural frequency and mode of the torsional vibration model of the main drive system using lumped mass method. What is more, the simulation analysis the dynamic response of the main drive system in the normal condition is carried out. The influence of the billet biting time on torque amplification coefficient is obtained through above simulation analysis. At the same time, the theoretic calculation consists with the simulation analysis.
3. Investigate the main reason of intensifying the torsional vibration of the main drive system by analyzing the reasons of affect the torsional vibration of the main drive system. The high speed of rolling, resulting in short biting time, is the main reason of causing excessive torque.
According to the analysis, Xiang Gang makes a improvement, decreasing the instantaneous speed when the billet enters the mill, leading the low failure rate of equipments and the improvement of quality and quantity of the product. In brief, the improvement brings enormous economic benefits and social benefits.
引文
[1] Fu-jun WANG, Xiao-qin LI, Jia-mei MA, Min YANG, Yu-liang ZHU. Experimental Investigation of Characteristic Frequency in Unsteady Hydraulic Behaviour of a Large Hydraulic Turbine[J]. Journal of Hydrodynamics, Ser. B, 2009,21(1):12-19.
[2]邱宇,邱家俊,张德栋.水轮发电机组短路故障时机电耦联的扭振问题研究[J].机械强度. 2004,26(2):142-148.
[3] Jian-Gang Guo, Li-Jun Zhou, Ya-Pu Zhao. Instability analysis of torsional MEMS/NEMS actuators under capillary force[J]. Journal of Colloid and Interface Science, Volume 331, Issue 2, 15 March 2009, Pages 458-462.
[4]唐贵基,王林,向玲.Holzer传递矩阵法在计算轴系扭振固有频率时的应用[J].汽轮机技术.2010,52(3):183-185.
[5]魏勇,罗虹,姜艳军.摄动有限元法在汽车传动系扭振分析中的应用[J].机械设计与制造.2010,(4):74-75.
[6]季泉生,马敬勋,郑建起,谢福利.轧机扭振新微分算子法研究[J].冶金设备.2009(05):34-38.
[7]戴桂平.基于EMD时频分析的轧机扭振瞬态冲击特征提取[J].仪表技术与传感器.2009(09):74-77.
[8]孟令启,王建勋,吴浩亮,雷明杰.中厚板立辊轧机主传动系统的非线性扭振[J].华南理工大学学报(自然科学版).2009(02):25-28.
[9]韩朝晖.摄动法在楔形杆轴纵扭固有振动分析中的应用[J].长春工业大学学报(自然科学版).2008(03):271-274.
[10]朱茂强.基于有限元动力学的曲轴CAE分析[J].装备制造技术.2010(03):38-41.
[11]许增金,王世杰.往复压缩机轴系扭振的数值分析[J].西安交通大学学报.2010(3):100-104.
[12]闫晓强,史灿,曹曦,刘丽娜.CSP轧机扭振与垂振耦合研究[J].振动.测试与诊断.2008,28(4):377-381.
[13] Charles VJ. Thomas,Torque Amplification and Torsional Vibration In Large Reversing MilD rives[J]. Iorn and SteelEng.1969,(5):55-73.
[14] Guy Monacs, Dynamics of rolling millsr-mathematical models and Experimental results[J]. Iron and Steel Eng.1977,(12) .
[15] Albert J.Molnar, Torque amplification factor (TAF) analyses and tests: Two bar mil stands[J]. Iron and Steel Eng.1981,(1).
[16] Alexm.Kashsy, J&R AISE Torque Amplification and Vibration Investigation Porject[J], Iron and Steel Eng.1973,(7).
[17]王勤,轧机主传动系统的扭振分析与建模[J].冶金设备2009,(4):6-9.
[18]崔超,减勇.轧机主传动系统扭振的有限元法研究[J].重型机械,1999. (4):31-34.
[19]邹家样等.带钢冷连轧机自激振动诊断[M].钢铁,1997.32 (7):64-68.
[20]臧勇.实用有限单元法[M].北京科技大学出版社,1993.
[21]范小彬,臧勇,吴迪平, CSP热连轧机振动问题[J].机械工程学报。2007 43(8):198-201.
[22] Jian-Gang Guo, Li-Jun Zhou, Ya-Pu Zhao Instability analysis of torsional MEMS/NEMS actuators under capillary force[J].Journal of Colloid and Interface Science,2009,331(15):458-462.
[23] Fu-jun WANG, Xiao-qin LI, Jia-mei MA, Min YANG, Yu-liang ZHU Experimental Investigation of Characteristic Frequency in Unsteady Hydraulic Behaviour of a Large Hydraulic Turbine[J].Journal of Hydrodynamics, Ser. B, 2009,21(1):12-19.
[24] H. Plaut. Snap loads and torsional oscillations of the original Tacoma Narrows Bridge[J].Journal of Sound and Vibration,2008,309(3-5): 613-636.
[25] Courant,R.,Variational Method for Solutions of Problems of Eguilibrium and Vibrations[J].Bull,Am.Math.Soc.1943,(49):1-23.
[26] Turner M J,Dill E H,Murtin H C et al.Large Deflections Subjected to Heating and External Loads[J].Journal of Aerespace Sciences, 1960,(27):97-106.
[27] R.H. Plaut . Snap loads and torsional oscillations of the original Tacoma Narrows Bridge[J]. Journal of Sound and Vibration,2008,309(3-5): 613-636
[28]邹家样等.带钢冷连轧机自激振动诊断[J].钢铁,1997.32 (7):64-68.
[29]崔丽红,吴迪平.650轧机万向接轴强度分析[J].冶金设备.1998(3):4-6.
[30]王革,陈大宏,邹家样.初轧机滑块式万向接轴叉头应力应变分析及计算机图形显示[J].冶金设备.1995(4):10-14.
[31]周金宇,陈占福.粗轧机主传动扭振分析[J].钢铁. 2007,42(5):51-54.
[32]王永涛,臧勇,吴迪平等. CSP轧机扭振中"伪拍振"的研究[J] .振动、测试与诊断.2009(2):209-213.
[33]陈华勇,黄培文,薛海鹏.1150初轧机主传动系统扭振研究[J].武汉冶金科技大学学报,1997.20(4):434-440. [34」黄培文.机械系统振动的动载荷计算方法[M].武汉:华中工学院出版社. 1987.
[35]刘爽,张业宽,刘彬.轧机主传动机电耦联扭振系统的动态分岔研究[J].机械工程学报.2010(3):83-89.
[36]崔超,减勇.轧机主传动系统扭振的有限元法研究[J].重型机械,1999. No .4:31-34.
[37]陈大宏,王祖城.Mm机万向接轴应力分析[J].钢铁.1986(11).
[38]黄晓刚,蹇开林.轧机主传动轴系扭振固有频率计算的有限元法[J].机械传动. 2007(6):63-66.
[39]康贵信,邹家祥.有限单元法及其在冶金机械中的应用[M].冶金工业出版社. 1991.
[40]刘浩然,张业宽,李晓梅,刘爽.轧机非线性传动系统冲击扭振的研究与抑制[J].振动与冲击.2010,29(7):179-183.
[41]周金宇,陈占福.粗轧机主传动扭振分析[J].钢铁. 2007,42(5):51-54.
[2]邱宇,邱家俊,张德栋.水轮发电机组短路故障时机电耦联的扭振问题研究[J].机械强度. 2004,26(2):142-148.
[3] Jian-Gang Guo, Li-Jun Zhou, Ya-Pu Zhao. Instability analysis of torsional MEMS/NEMS actuators under capillary force[J]. Journal of Colloid and Interface Science, Volume 331, Issue 2, 15 March 2009, Pages 458-462.
[4]唐贵基,王林,向玲.Holzer传递矩阵法在计算轴系扭振固有频率时的应用[J].汽轮机技术.2010,52(3):183-185.
[5]魏勇,罗虹,姜艳军.摄动有限元法在汽车传动系扭振分析中的应用[J].机械设计与制造.2010,(4):74-75.
[6]季泉生,马敬勋,郑建起,谢福利.轧机扭振新微分算子法研究[J].冶金设备.2009(05):34-38.
[7]戴桂平.基于EMD时频分析的轧机扭振瞬态冲击特征提取[J].仪表技术与传感器.2009(09):74-77.
[8]孟令启,王建勋,吴浩亮,雷明杰.中厚板立辊轧机主传动系统的非线性扭振[J].华南理工大学学报(自然科学版).2009(02):25-28.
[9]韩朝晖.摄动法在楔形杆轴纵扭固有振动分析中的应用[J].长春工业大学学报(自然科学版).2008(03):271-274.
[10]朱茂强.基于有限元动力学的曲轴CAE分析[J].装备制造技术.2010(03):38-41.
[11]许增金,王世杰.往复压缩机轴系扭振的数值分析[J].西安交通大学学报.2010(3):100-104.
[12]闫晓强,史灿,曹曦,刘丽娜.CSP轧机扭振与垂振耦合研究[J].振动.测试与诊断.2008,28(4):377-381.
[13] Charles VJ. Thomas,Torque Amplification and Torsional Vibration In Large Reversing MilD rives[J]. Iorn and SteelEng.1969,(5):55-73.
[14] Guy Monacs, Dynamics of rolling millsr-mathematical models and Experimental results[J]. Iron and Steel Eng.1977,(12) .
[15] Albert J.Molnar, Torque amplification factor (TAF) analyses and tests: Two bar mil stands[J]. Iron and Steel Eng.1981,(1).
[16] Alexm.Kashsy, J&R AISE Torque Amplification and Vibration Investigation Porject[J], Iron and Steel Eng.1973,(7).
[17]王勤,轧机主传动系统的扭振分析与建模[J].冶金设备2009,(4):6-9.
[18]崔超,减勇.轧机主传动系统扭振的有限元法研究[J].重型机械,1999. (4):31-34.
[19]邹家样等.带钢冷连轧机自激振动诊断[M].钢铁,1997.32 (7):64-68.
[20]臧勇.实用有限单元法[M].北京科技大学出版社,1993.
[21]范小彬,臧勇,吴迪平, CSP热连轧机振动问题[J].机械工程学报。2007 43(8):198-201.
[22] Jian-Gang Guo, Li-Jun Zhou, Ya-Pu Zhao Instability analysis of torsional MEMS/NEMS actuators under capillary force[J].Journal of Colloid and Interface Science,2009,331(15):458-462.
[23] Fu-jun WANG, Xiao-qin LI, Jia-mei MA, Min YANG, Yu-liang ZHU Experimental Investigation of Characteristic Frequency in Unsteady Hydraulic Behaviour of a Large Hydraulic Turbine[J].Journal of Hydrodynamics, Ser. B, 2009,21(1):12-19.
[24] H. Plaut. Snap loads and torsional oscillations of the original Tacoma Narrows Bridge[J].Journal of Sound and Vibration,2008,309(3-5): 613-636.
[25] Courant,R.,Variational Method for Solutions of Problems of Eguilibrium and Vibrations[J].Bull,Am.Math.Soc.1943,(49):1-23.
[26] Turner M J,Dill E H,Murtin H C et al.Large Deflections Subjected to Heating and External Loads[J].Journal of Aerespace Sciences, 1960,(27):97-106.
[27] R.H. Plaut . Snap loads and torsional oscillations of the original Tacoma Narrows Bridge[J]. Journal of Sound and Vibration,2008,309(3-5): 613-636
[28]邹家样等.带钢冷连轧机自激振动诊断[J].钢铁,1997.32 (7):64-68.
[29]崔丽红,吴迪平.650轧机万向接轴强度分析[J].冶金设备.1998(3):4-6.
[30]王革,陈大宏,邹家样.初轧机滑块式万向接轴叉头应力应变分析及计算机图形显示[J].冶金设备.1995(4):10-14.
[31]周金宇,陈占福.粗轧机主传动扭振分析[J].钢铁. 2007,42(5):51-54.
[32]王永涛,臧勇,吴迪平等. CSP轧机扭振中"伪拍振"的研究[J] .振动、测试与诊断.2009(2):209-213.
[33]陈华勇,黄培文,薛海鹏.1150初轧机主传动系统扭振研究[J].武汉冶金科技大学学报,1997.20(4):434-440. [34」黄培文.机械系统振动的动载荷计算方法[M].武汉:华中工学院出版社. 1987.
[35]刘爽,张业宽,刘彬.轧机主传动机电耦联扭振系统的动态分岔研究[J].机械工程学报.2010(3):83-89.
[36]崔超,减勇.轧机主传动系统扭振的有限元法研究[J].重型机械,1999. No .4:31-34.
[37]陈大宏,王祖城.Mm机万向接轴应力分析[J].钢铁.1986(11).
[38]黄晓刚,蹇开林.轧机主传动轴系扭振固有频率计算的有限元法[J].机械传动. 2007(6):63-66.
[39]康贵信,邹家祥.有限单元法及其在冶金机械中的应用[M].冶金工业出版社. 1991.
[40]刘浩然,张业宽,李晓梅,刘爽.轧机非线性传动系统冲击扭振的研究与抑制[J].振动与冲击.2010,29(7):179-183.
[41]周金宇,陈占福.粗轧机主传动扭振分析[J].钢铁. 2007,42(5):51-54.