基于等效阻尼的支承性能评价方法
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- 英文论文题名：Evaluation method for performance of support based on equivalent damping
- 论文作者：梁长记 ; 贾春奇 ; 周亭俊 ; 苏深坚
- 英文论文作者：LIANG Chang-ji ; JIA Chun-qi ; ZHOU Ting-jun ; SU Shen-jian ; Research Institute of Physical and Chemical Engineering of Nuclear Industry
- 年：2015
- 作者机构：核工业理化工程研究院;
- 英文论文关键词：support ; equipment damping ; measurement
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第4册（同位素分离分卷）
- 语种：中文
- 分类号：TB53
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：302k
- 原文格式：O
- 会议级别：全国
摘要
旋转设备的支承系统由阻尼器和支承轴组成,共同作用为转子系统提供支承和阻尼作用,可以确保机器在启动过程中能够顺利通过系统临界频率,在工作转速下具有足够安全裕度,同时在受到短暂冲击(事故漏气、临近机器炸机、停电、停水、地震等)导致转子系统出现进动后能使系统尽快恢复稳定运行。阻尼器的性能参数主要包括折合质量和阻尼系数,代表阻尼器吸收振动能力的高低,支承轴主要性能参数是刚度,影响振动由转子到阻尼器的传递,作为一个组合,应该把整个支承系统作为研究对象来研究其耗能减振能力和工作频率范围,这样才利于找到转子系统最优的支承系统,进而实现设计的系统化。本文把下支承等效成实部为等效刚度和虚部为等效阻尼与频率的乘积,其中等效阻尼就相当于一个直接作用于转子的外阻尼,来抑制转子失稳,在此基础上对旋转设备下支承等效阻尼进行理论计算分析,对其测量方法进行研究,设计了阻尼器性能参数的测量方法和测量装置,使用DASP系统对旋转设备支承系统的振动特性进行测量计算,得到其等效阻尼随振动频率的变化曲线。
support system of specil equipment comprises damper and bearing,which provides rotor supporting and damping role,makes sure that machine passed smooth the critical frequency of system smoothly at startup and has enough safety margin under rotor work.At the same,when the rotor appears move due to brief impact to machine,such as flat,,fired machine,power cuts,water stop,earthquake and so on,it makes system restore stability as soon as possible.The performance of damper contains mass and dumping coefficient,which is the ability for damper to absorb vibration power.The main performance of bearing is stiffness,which impacts on the vibration transfer from rotor to damper.The ability of vibration reduces and working frequency scope are studied by researching the whole support system.The omptimal support system will be easily obtained by this way and the systematic design would be implementated.In this paper,support is equivalent to real part of equivalent stiffness and virtual part which is product of equivalent damping and frequency.Equivalent damping is a direct role on the outside damping of rotor,the instability of rotor is controled.Equivalent damping of support for specil equipment is calculated based on it.The measure method and equipment of damping performance are designed in this paper and quivalent damping curve following the vibration frequency is obtained though the characteristic of support's vibration are measured and calculated by DASP system.
support system of specil equipment comprises damper and bearing,which provides rotor supporting and damping role,makes sure that machine passed smooth the critical frequency of system smoothly at startup and has enough safety margin under rotor work.At the same,when the rotor appears move due to brief impact to machine,such as flat,,fired machine,power cuts,water stop,earthquake and so on,it makes system restore stability as soon as possible.The performance of damper contains mass and dumping coefficient,which is the ability for damper to absorb vibration power.The main performance of bearing is stiffness,which impacts on the vibration transfer from rotor to damper.The ability of vibration reduces and working frequency scope are studied by researching the whole support system.The omptimal support system will be easily obtained by this way and the systematic design would be implementated.In this paper,support is equivalent to real part of equivalent stiffness and virtual part which is product of equivalent damping and frequency.Equivalent damping is a direct role on the outside damping of rotor,the instability of rotor is controled.Equivalent damping of support for specil equipment is calculated based on it.The measure method and equipment of damping performance are designed in this paper and quivalent damping curve following the vibration frequency is obtained though the characteristic of support's vibration are measured and calculated by DASP system.
引文
[1]贾春奇,苏深坚,王霞.支承性能一体化测量方法研究.2012.
[2]苏深坚.旋转设备系统等效阻尼的初步研究.2006.
[3]李德葆,陆秋海.工程振动试验分析.北京:清华大学出版社,2004.
[4]苏深坚,贾春奇.支承系统工作频率范围理论研究及其测量方法探讨.2010.
[2]苏深坚.旋转设备系统等效阻尼的初步研究.2006.
[3]李德葆,陆秋海.工程振动试验分析.北京:清华大学出版社,2004.
[4]苏深坚,贾春奇.支承系统工作频率范围理论研究及其测量方法探讨.2010.