检索结果-南通市图书馆

Is laser surface texturing good or bad for rolling element bearings?--Comments on: “Does laser surface texturing really have a negative impact on the fatigue lifetime of mechanical components?” by Hsu et al. and “An exploration of frictional and vibrational behaviors of textured deep groove ball bearing in the vicinity of requisite minimum load” by Vidyasagar et al.

引用

Friction 2021年第6期9卷 1784-1786页

作者： Yonggang MENG State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China

A short commentary on the two research articles published in Friction in 2021 is *** articles reported experimental results of applications of laser surface texturing technology to the raceway of rolling element *** briefly reviewing the main findings of the articles,the arguable problems and distinctions between the two articles are pointed out.

关键词： rolling element bearings laser surface texturing(LST) fatigue life wear vibration

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

Fault Early Diagnosis of rolling element bearings Combining Wavelet Filtering and Degree of Cyclostationarity Analysis

引用

Journal of Shanghai Jiaotong university(Science) 2005年第4期10卷 446-448,455页

作者： ZHOU Fu-chang（周福昌） CHEN Jin（陈进） HE Jun（何俊） BI Guo （毕果） LI Fu-cai （李富才） ZHANG Gui-cai （张桂材） State Key Lab. of Vibration Shock and Noise Shanghai Jiaotong Univ. Shanghai 200240 China

The vibration signals of rolling element bearing are produced by a combination of periodic and random processes due to the machine’s rotation cycle and interaction with the real world. The combination of such components can give rise to signals, which have periodically time-varying ensemble statistical and are best considered as cyclostationary. When the early fault occurs, the background noise is very heavy, it is difficult to disclose the latent periodic components successfully using cyclostationary analysis alone. In this paper the degree of cyclostationarity is combined with wavelet filtering for detection of rolling element bearing early faults. Using the proposed entropy minimization rule. The parameters of the wavelet filter are optimized. This method is shown to be effective in detecting rolling element bearing early fault when cyclostationary analysis by itself fails.

关键词： cyclostationary degree of cyclostationarity fault diagnosis rolling element bearings

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

An Overview of Bearing Candidates for the Next Generation of Reusable Liquid Rocket Turbopumps

引用

Chinese Journal of Mechanical Engineering 2020年第2期33卷 43-55页

作者： Jimin Xu Changhuan Li Xusheng Miao Cuiping Zhang Xiaoyang Yuan Institute of Tribology School of Mechanical EngineeringHefei University of TechnologyHefei 230009China Aerospace Propulsion Institute China Aerospace Science and Technology CorporationXi’an 710100China Science Technology on Combustion Internal Flow and Thermal‑structure LaboratoryNorthwestern Polytechnical UniversityXi’an 710012China Superconducting Materials Research Center Laboratory Northwest Institute for Non-ferrous Metal ResearchXi’an 710016China Key Laboratory of Education Ministry for Modern Design and Rotor‑Bearing System Xi’an Jiaotong UniversityXi’an 710049China

There is a consensus in the aerospace field that the development of reusable liquid rockets can effectively reduce the launch *** pursuit of a long service life and reutilization highly depends on the bearing ***,the rolling element bearings(REBs)used in the existing rocket turbopumps present obvious and increasing limitations due to their mechanical contacting *** REBs,high rotational speed and long service life are two performance indexes that mutually restrict each *** go beyond the DN value(the product of the bearing bore and rotational speed)limit of REBs,the major space powers have conducted substantial explorations on the use of new types of bearings to replace the *** review discusses,first,the crucial role of bearings in rocket turbopumps and the related structural improvements of ***,with the prospect of application to the next generation of reusable liquid rocket turbopumps,the bearing candidates investigated by major space powers are summarized *** promising alternatives to REBs include fluid-film,foil,and magnetic bearings,together with the novel superconducting compound bearings recently proposed by our *** more than ten years of relevant research on fluid-film and magnetic bearings are also *** review is meaningful for the development of long-life and highly reliable bearings to be used in future reusable rocket turbopumps.

关键词： Aerospace Reusable liquid rocket turbopumps rolling element bearings Bearing candidates Review

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

RMA-CNN:A Residual Mixed Domain Attention CNN for bearings Fault Diagnosis and Its Time-Frequency Domain Interpretability

引用

Journal of Dynamics, Monitoring and Diagnostics 2023年第2期2卷 115-132页

作者： Dandan Peng Huan Wang Wim Desmet Konstantinos Gryllias Department of Mechanical Engineering Faculty of Engineering ScienceKU LeuvenLeuvenBelgium Flanders Make@KU Leuven Celestijnenlaan 300BOX 24203001 LeuvenBelgium Department of Industrial Engineering Tsinghua UniversityBeijing 100084China Leuven.AI–KU Leuven Institute for AI B-3000LeuvenBelgium

Early fault diagnosis of bearings is crucial for ensuring safe and reliable *** neural networks(CNNs)have achieved significant breakthroughs in machinery fault ***,complex and varying working conditions can lead to inter-class similarity and intra-class variability in datasets,making it more challenging for CNNs to learn discriminative ***,CNNs are often considered“black boxes”and lack sufficient interpretability in the fault diagnosis *** address these issues,this paper introduces a residual mixed domain attention CNN method,referred to as *** method comprises multiple residual mixed domain attention modules(RMAMs),each employing one attention mechanism to emphasize meaningful features in both time and channel *** significantly enhances the network’s ability to learn fault-related ***,we conduct an in-depth analysis of the inherent feature learning mechanism of the attention module RMAM to improve the interpretability of CNNs in fault diagnosis *** conducted on two datasets—a high-speed aeronautical bearing dataset and a motor bearing dataset—demonstrate that the RMA-CNN achieves remarkable results in diagnostic tasks.

关键词： attention interpretability CNN fault diagnosis rolling element bearings

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

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

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

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：