检索结果-南通市图书馆

Fluid-solid Interaction Model for Hydraulic Reciprocating O-ring Seals

Chinese Journal of Mechanical Engineering 2013年第1期26卷 85-94页

作者： liao chuanjun HUANG Weifeng WANG Yuming SUO Shuangfu LIU Ying State Key Laboratory of Tribology Tsinghua University

Elastohydrodynamic lubrication characteristics of hydraulic reciprocating seals have significant effects on sealing and tribology performances of hydraulic actuators, especially in high parameter hydraulic systems. Only elastic deformations of hydraulic reciprocating seals were discussed, and hydrodynamic effects were neglected in many studies. The physical process of the fluid-solid interaction effect did not be clearly presented in the existing fluid-solid interaction models for hydraulic reciprocating O-ring seals, and few of these models had been simultaneously validated through experiments. By exploring the physical process of the fluid-solid interaction effect of the hydraulic reciprocating O-ring seal, a numerical fluid-solid interaction model consisting of fluid lubrication, contact mechanics, asperity contact and elastic deformation analyses is constructed with an iterative procedure. With the SRV friction and wear tester, the experiments are performed to investigate the elastohydrodynamic lubrication characteristics of the O-ring seal. The regularity of the friction coefficient varying with the speed of reciprocating motion is obtained in the mixed lubrication condition. The experimental result is used to validate the fluid-solid interaction model. Based on the model, The elastohydrodynamic lubrication characteristics of the hydraulic reciprocating O-ring seal are presented respectively in the dry friction, mixed lubrication and full film lubrication conditions, including of the contact pressure, film thickness, friction coefficient, liquid film pressure and viscous shear stress in the sealing zone. The proposed numerical fluid-solid interaction model can be effectively used to analyze the operation characteristics of the hydraulic reciprocating O-ring seal, and can also be widely used to study other hydraulic reciprocating seals.

关键词： reciprocating O-ring seal elastohydrodynamic lubrication finite-element method fluid-solid interaction mixed lubrication,SRV friction and wear tester

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermal Fluid-Solid Interaction Model and Experimental Validation for Hydrostatic Mechanical Face Seals

引用

Chinese Journal of Mechanical Engineering 2014年第5期27卷 949-957页

作者： HUANG Weifeng liao chuanjun LIU Xiangfeng SUO Shuangfu LIU Ying WANG Yuming State Key Laboratory of Tribology Tsinghua University Beijing Institute of Astronautical Systems Engineering

Hydrostatic mechanical face seals for reactor coolant pumps are very important for the safety and reliability of pressurized-water reactor power *** accurate models on the operating mechanism of the seals are needed to help improve their *** thermal fluid–solid interaction（TFSI）mechanism of the hydrostatic seal is investigated in this *** models of the flow field and seal assembly are *** on the mechanism for the continuity condition of the physical quantities at the fluid–solid interface,an on-line numerical TFSI model for the hydrostatic mechanical seal is proposed using an iterative coupling *** mesh technology is adopted to adapt to the changing boundary *** were performed on a test rig using a full-size test seal to obtain the leakage rate as a function of the differential *** effectiveness and accuracy of the TFSI model were verified by comparing the simulation results and experimental *** the TFSI model,the behavior of the seal is presented,including mechanical and thermal deformation,and the temperature *** influences of the rotating speed and differential pressure of the sealing device on the temperature field,which occur widely in the actual use of the seal,are *** research proposes an on-line and assembly-based TFSI model for hydrostatic mechanical face seals,and the model is validated by full-sized experiments.

关键词： mechanical face seal hydrostatic thermal fluid–solid interaction experiment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fluid-solid strong-interaction model of mechanical seals in reactor coolant pumps

引用

Science China(Technological Sciences) 2011年第9期54卷 2339-2348页

作者： liao chuanjun HUANG WeiFeng SUO ShuangFu LIU XiangFeng WANG YuMing State Key Laboratory of Tribology Tsinghua University Beijing 100049 China

The studies on the mechanisms and performances of the mechanical seals in reactor coolant pumps are very important for the safe operations of the pressurized water reactor power plants. Based on the hydrostatic mechanical seal in reactor coolant pumps, an analytical fluid-solid strong-interaction model is proposed in this paper. According to the design features and operafional principles of the seal, an analytical method to calculate the mechanical deformation of the seal assembly is developed based on the ring deformation theory. A strong-interaction algorithm combining the analysis of the mechanical deformation of the seal assembly and flow field between the seal faceplates is utilized, in which the three kinds of equations including the fluid domain, solid domain and coupling action are constituted in the same equations set and all the variables are solved simul- taneously. So the analytical fluid-solid strong-interaction model used for the seal is built. Moreover, the model is verified by the experimental results. Based on the model, the design parameters of the seal are studied. Two different conditions of the general case and fixed seal leakage rate are discussed respectively, and the regularities that the seal behaviors are affected by the parameters of the holding screws on the clamp rings and seal faceplates are obtained. The research results can provide a theoretical basis for performance analysis, design and assemblage of the seal. Compared to the numerical methods, the proposed model has the unique advantages of high efficiency, convenience and easy application of constraints.

关键词： mechanical seal hydrostatic nuclear pump fluid-solid interaction strong-interaction analytical method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

超快激光诱导等离子体成丝光谱

引用

宇航总体技术 2024年第3期8卷 14-21页

作者：李兆星周萍郝婷宋海英廖传军北京工业大学北京100124 北京宇航系统工程研究所北京100076 太原科技大学太原030024

飞秒激光等离子体光丝大气中传输的独特物理过程在航天领域具有重要的应用前景。采用仿真与实验,验证了飞秒等离子体成丝的光谱展宽特征,获得了超快等离子体光丝在不同参数特征下,覆盖从可见到红外探测系统的波谱范围,及保持系统相对稳... 详细信息

飞秒激光等离子体光丝大气中传输的独特物理过程在航天领域具有重要的应用前景。采用仿真与实验,验证了飞秒等离子体成丝的光谱展宽特征,获得了超快等离子体光丝在不同参数特征下,覆盖从可见到红外探测系统的波谱范围,及保持系统相对稳定的特征,对于借助强激光等离子体光丝光谱进行红外特征探测具有重要的启发作用。

关键词：超快激光成丝等离子体光谱红外探测

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Applications of Wigner high-order spectra in feature extraction of acoustic emission signals

引用

Engineering Sciences 2009年第3期7卷 59-65页

作者： Xiao Siwen liao chuanjun Li Xuejun Key Lab of Health Maintenance for Mechanical Equipment of Hunan Province Hunan Science and Technology University Xiangtan Hunan 411201 China Department of Precision Instruments Tsinghua University Beijing 100084 China

The characteristics of typical AE signals initiated by mechanical component damages are analyzed. Based on the extracting principle of acoustic emission(AE) signals from damaged components,the paper introduces Wigner high-order spectra to the field of feature extraction and fault diagnosis of AE signals. Some main performances of Wigner binary spectra,Wigner triple spectra and Wigner-Ville distribution (WVD) are discussed,including of time-frequency resolution,energy accumulation,reduction of crossing items and noise elimination. Wigner triple spectra is employed to the fault diagnosis of rolling bearings with AE techniques. The fault features reading from experimental data analysis are clear,accurate and intuitionistic. The validity and accuracy of Wigner high-order spectra methods proposed agree quite well with simulation results. Simulation and research results indicate that wigner high-order spectra is quite useful for condition monitoring and fault diagnosis in conjunction with AE technique,and has very important research and application values in feature extraction and faults diagnosis based on AE signals due to mechanical component damages.

关键词： acoustic emission Wigner spectra Wigner binary spectra Wigner triple spectra feature extraction rolling bearing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

适于声发射信号故障特征提取的小波函数

引用

机械工程学报 2008年第3期44卷 177-181页

作者：李学军廖传军褚福磊湖南科技大学机械设备健康维护湖南省重点实验室湘潭411201 清华大学精密仪器与机械学系北京100084

小波分析具有很强的弱信号检测能力,适于提取声发射信号的故障特征,但是在目前声发射信号的小波分析中,所普遍采用的小波函数诊断效果欠佳,亟需改进和优化。在分析典型机械故障声发射信号特征的基础上,根据损伤型声发射信号故障特征的... 详细信息

小波分析具有很强的弱信号检测能力,适于提取声发射信号的故障特征,但是在目前声发射信号的小波分析中,所普遍采用的小波函数诊断效果欠佳,亟需改进和优化。在分析典型机械故障声发射信号特征的基础上,根据损伤型声发射信号故障特征的提取原理,通过连续小波基函数的构造方法,设计了一种适于声发射信号故障特征提取的小波基函数。将该函数与普遍使用的Daubechies小波同时用于声发射检测的滚动轴承损伤类型及部件的识别,结果表明前者的诊断效果更加清晰、准确、可靠。理论分析和试验研究均证明了所构造小波函数的科学性和有效性。

关键词：小波函数小波变换声发射故障诊断特征提取滚动轴承

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

STFT在AE信号特征提取中的应用

引用

仪器仪表学报 2008年第9期29卷 1862-1867页

作者：廖传军李学军刘德顺湖南科技大学机械设备健康维护湖南省重点实验室湘潭411201

机械故障或损伤引发的声发射信号南高频突发脉冲信号和长周期准平稳噪声信号组成,适宜用短时傅里叶变换(STFT)描述其时频特征。本文通过分析典型AE信号及其特征提取,首次将STFT引入声发射故障诊断领域,并提出了AE信号的STFT分析法。通... 详细信息

机械故障或损伤引发的声发射信号南高频突发脉冲信号和长周期准平稳噪声信号组成,适宜用短时傅里叶变换(STFT)描述其时频特征。本文通过分析典型AE信号及其特征提取,首次将STFT引入声发射故障诊断领域,并提出了AE信号的STFT分析法。通过理论分析和仿真,确定了AE信号STFT的理想窗函数及其参数选择,有效地克服了STFT只用一个固定窗分析多尺度信号的缺陷。将STFT用于声发射检测的滚动轴承损伤类型及部件的识别,诊断结果十分准确、清晰和直观。仿真分析和实验研究均表明了STFT能有效提取AE信号的特征,为AE信号的波形分析开辟了一条有效的途径。

关键词： AE STFT 特征提取窗函数故障诊断轴承

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

小波再分配尺度谱在声发射信号特征提取中的应用

引用

机械工程学报 2009年第2期45卷 273-279页

作者：廖传军李学军刘德顺湖南科技大学机电工程学院湘潭411201

在分析典型声发射(Acoustic emission,AE)信号特征的基础上,根据机械故障或损伤引发的AE信号的故障特征提取原理和特点,首次提出AE信号的小波再分配尺度谱分析法。将小波尺度谱和再分配尺度谱同时用于AE信号的特征提取,再分配尺度谱能... 详细信息

在分析典型声发射(Acoustic emission,AE)信号特征的基础上,根据机械故障或损伤引发的AE信号的故障特征提取原理和特点,首次提出AE信号的小波再分配尺度谱分析法。将小波尺度谱和再分配尺度谱同时用于AE信号的特征提取,再分配尺度谱能提高尺度图的聚集性,减少干扰项,更准确地表征AE信号中的特征信息。通过理论研究和仿真,确定了小波再分配尺度谱基函数及其参数的选择,克服了小波再分配尺度谱的时、频分辨率不能同时达到最好的缺陷。将小波再分配尺度谱用于声发射检测的滚动轴承损伤类型及部件的识别,诊断结果十分直观、清晰、准确。仿真分析和试验研究均表明了小波再分配尺度谱能有效应用于基于声发射技术的状态监测和故障诊断。

关键词：声发射小波变换尺度谱再分配尺度谱特征提取故障诊断轴承

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental Research on Resonance Response Differences of the Rotor System with Sliding and Rolling Bearings

引用

工程科学（英文版） 2007年第2期5卷 161-167页

作者： Chen Anhua, liao chuanjun, Li Xuejun(Key Lab of Health Maintenance for Mechanical Equipment of Hunan Province, Hunan Science and Technology University, Xiangtan, Hunan 411201)

Most of the research work on bearing-rotor systems usually simplifies the supporting bearing as a spring or damp system, and ignores that the resonance responses involve obvious differences when the same rotor system is supported by varying types of bearings. Aiming at the resonance responses of coast down running tests of the rotor system, we employed two different bearings in experiments: One is the fluid film journal bearing, and the other is the rolling element bearing. The experimental results obtained with the above bearings are compared. The resonance test Bode plots and orbit shapes of the rotor shaft are established. Also, summarized under resonance are the dynamic characteristics and regularities of the two types of bearing-rotor systems. The natural frequency and resonance mode of the same rotor system will change thoroughly with the type of supporting bearings. The results are helpful for system modeling, security running, dynamic design, the study of dynamic characteristics, and the fault diagnose of bearing-rotor systems.

关键词： rotor resonance response bearing Bode plot orbit shape

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

流体静压型机械密封的半解析式流固耦合模型

引用

机械工程学报 2010年第20期46卷 145-151页

作者：廖传军黄伟峰索双富魏琳宗王玉明清华大学摩擦学国家重点实验室北京100084

提出一种适用于流体静压型机械密封的半解析式流固耦合分析模型。根据典型流体静压型机械密封的结构特点和工作原理,在圆环变形理论的基础上发展求解密封环机械变形的解析方法,以有限元法验证其正确性并确定其适用范围。以密封环机械变... 详细信息

提出一种适用于流体静压型机械密封的半解析式流固耦合分析模型。根据典型流体静压型机械密封的结构特点和工作原理,在圆环变形理论的基础上发展求解密封环机械变形的解析方法,以有限元法验证其正确性并确定其适用范围。以密封环机械变形和间隙流场计算的解析方法为基础,以密封环变形偏转角作为流体域和固体域的计算传递参数,提出流体静压型机械密封的半解析式流固耦合模型。基于所提出的半解析式流固耦合模型,求得某一工况条件下的压力分布、泄漏率和液膜刚度等参数,并与纯流场计算结果进行对比。并进一步研究密封端面初始锥角和螺钉预紧力等因素对密封性能的影响规律。所研究内容为流体静压型机械密封的流固耦合研究提供一种便捷、高效的方法。

关键词：机械密封流体静压流固耦合半解析法 Reynolds方程

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：