温度对小型涡轮泵转子临界转速影响研究
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摘要
为研究小型燃气涡轮转子工作期间转子轴向温差对转子的动力学特性的影响。利用workbench对转子进行瞬态热仿真,分析转子在工作期间的温度分布规律,并将温度分析结果施加至转子模型上,通过采用传递矩阵法,对温度场作用下涡轮转子的临界转速进行分析计算,结果表明,临界转速随温度的升高降低。轮盘的温度升高会引起第三阶临界转速下降,对一二阶影响很小;轴段的温升对前三阶临界转速都有降低的效应。
In order to study the influence of axial temperature difference of rotor on dynamic characteristics of the rotor during the operation of a small gas turbine rotor,the transient thermal simulation was carried out on the rotor using the workbench. The law of temperature distribution on the rotor was analyzed during the operation of the rotor,and the temperature analysis results were applied to the rotor model. The critical speed of the turbine rotor under the temperature field was analyzed and calculated by the transfer matrix method. The results show that the critical speed decreases with the rise of temperature.The temperature rise of the disc will cause decrease of the third order critical speed,but has little impact on the first and the second order. The temperature rise of the shaft section can cause decrease of the first three orders of critical speed.
In order to study the influence of axial temperature difference of rotor on dynamic characteristics of the rotor during the operation of a small gas turbine rotor,the transient thermal simulation was carried out on the rotor using the workbench. The law of temperature distribution on the rotor was analyzed during the operation of the rotor,and the temperature analysis results were applied to the rotor model. The critical speed of the turbine rotor under the temperature field was analyzed and calculated by the transfer matrix method. The results show that the critical speed decreases with the rise of temperature.The temperature rise of the disc will cause decrease of the third order critical speed,but has little impact on the first and the second order. The temperature rise of the shaft section can cause decrease of the first three orders of critical speed.
引文
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[2]徐宁,刘占生,董延阳,等.转子热致振动现象的瞬态响应特性研究[J].振动与冲击,2015,34(19):163-170.
[3]何娜娜,胡念苏,王建梅,等.国产300MW汽轮机组的转子瞬态温度场分析[J].汽轮机技术,2003,45(5):276-278.
[4]郭飞跃,邓旺群,成晓鸣.涡轴发动机组合压气机转子轴向预紧力计算方法[J].航空动力学报,2004,19(5):623-629.
[5]陆山,任平珍.某型发动机转子热弯曲变形及其影响数值分析[C]//发动机结构强度振动学术会议,1996.
[6]Rui Z,Ren J,Hongguang L I,et al. NOnlinear dynamics study of a high-temperature rotor-bearingseal system in gas turbine[J].Afore,2014,19(1):629-640.
[7]袁惠群.转子动力学基础[M].北京:冶金工业出版社,2013.
[8]谢丽婉.聚乙烯燃气管道DS-AHP-GRA安全评价程序及应用[J].压力容器,2018,35(9):43-49.
[9]孟晓丽,郭岩宝,孟涛,等.燃气PE管道安全状况等级评定初探[J].压力容器,2017,34(5):52-57.
[10]史勇,肉孜·阿木提,高泽斌.燃气式滚筒型多馕高效烘烤装置的试验研究[J].包装与食品机械,2018,36(2):10-15.
[11]李菲,张岩,崔萌萌,等.聚乙烯醇基抗菌包装材料的研究进展[J].包装与食品机械,2018,36(2):58-62.
[12]胡松涛,黄伟峰,刘向锋,等.螺旋槽干气密封压差扰动下的瞬态特性研究[J].流体机械,2017,45(2):22-27.
[13]孙帅辉,刘蓉,郭鹏程,等.转速对涡旋液泵空化性能的影响[J].流体机械,2018,46(4):23-28.
[14]王正.转动机械的转子动力学设计[M].北京:清华大学出版社,2015.