Journal of Tribology-transactions of The Asme最新文献_第8页

Prediction of static characteristics of hydrodynamic air foil bearing considering contact and friction between foils 考虑叶间接触和摩擦的气动翼型轴承静特性预测

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062369

Nanrong Hu, H. Jia, Bifeng Yin, Zeyuan Zhou, Bo Xu

{"title":"Prediction of static characteristics of hydrodynamic air foil bearing considering contact and friction between foils","authors":"Nanrong Hu, H. Jia, Bifeng Yin, Zeyuan Zhou, Bo Xu","doi":"10.1115/1.4062369","DOIUrl":"https://doi.org/10.1115/1.4062369","url":null,"abstract":"\u0000 The elastohydrodynamic model of hydrodynamic air foil bearing has been built to study the influence of rotor speed, the friction coefficient between bearing components, load and other parameters on the foil displacement of hydrodynamic air bearing under steady-state conditions. The static characteristics of hydrodynamic air foil bearing are predicted by using the numerical simulation method. The results show that the radial displacement of the foil is the smallest at both ends of the bearing and the largest at the middle of the bearing, while the top foil changes gently along the width of the bearing away from the maximum pressure. After increasing the rotating speed, the maximum fluid pressure improves and the action position shifts, and the increase of rotating speed has a significant impact on the maximum pressure. improving the friction coefficient μ2 between the bump foil and the bearing sleeve has different effects on the displacement of the foil. When μ1 is 0.1, by promoting μ2, the transverse displacement of the top foil at the pressure peak increases by 20.9%, the longitudinal displacement is reduced by 8.9%, the transverse displacement and the maximum longitudinal negative displacement of the bump foil are decreased by 53.2% and 31.7% respectively. Furthermore, the longitudinal displacement of bump foil at the fixed end has been reduced by increasing the load, and the relative size of the friction coefficient between the components affects the size and direction of the foil displacement at the same load.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46037955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of turbulence effect for coupled journal-thrust water-lubricated bearing with micro grooves 微沟槽轴颈-推力耦合水润滑轴承湍流效应数值分析

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062362

Tianyou Yang, Jianlin Cai, Liwu Wang, Dongxing Tang, Shouan Chen, Jiaxu Wang

{"title":"Numerical analysis of turbulence effect for coupled journal-thrust water-lubricated bearing with micro grooves","authors":"Tianyou Yang, Jianlin Cai, Liwu Wang, Dongxing Tang, Shouan Chen, Jiaxu Wang","doi":"10.1115/1.4062362","DOIUrl":"https://doi.org/10.1115/1.4062362","url":null,"abstract":"\u0000 The purpose of this study is to assess the role of the turbulence on the lubrication performances of coupled journal-thrust water-lubricated bearing with micro grooves using a numerical model. The results of the simulation model are compared to the published experimental data to verify the validity of the numerical model. The load capacity, maximum film pressure and local Reynolds number variations with the rotating speed, eccentricity, radial clearance, axial geometric gap and micro groove depth for coupled journal-thrust water-lubricated bearing are examined. Furthermore, the calculated results under the turbulent flow are compared with those under laminar flow for coupled and separate bearings. The results show that the turbulence effect can improve the lubrication performances by enlarging fluid pressure and load capacity of the coupled journal-thrust bearing and the laminar flow assumption is no longer applicable to the actual operating conditions of the water-lubricated bearings at a high rotation speed. In addition, there are existed optimal micro groove depths for both journal bearing and thrust bearing to reach the peak of the load capacity while the optimal micro groove depths for journal bearing and thrust bearing are not the same.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42245688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Prediction of Frictional Moment of Cylindrical Roller Bearing Using Experimental Data Driven Artificial Neural Networks 基于实验数据驱动的人工神经网络预测圆柱滚子轴承摩擦力矩

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062367

Yu Hou, Xi Wang, Bihe Xu, Yangli-ao Geng, Qingyong Li, Di Yang

引用次数: 0

Experimental and simulation analysis on windage power loss of herringbone gear pair 人字形齿轮副风阻功率损失的实验与仿真分析

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062365

Jin Yang, Tengjiao Lin, L. Jiang

引用次数: 0

Interaction between gear surface wear and contact fatigue 齿轮表面磨损与接触疲劳的相互作用

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062363

Shengnan Zhang, Ming Yan, Yushi Wang

引用次数: 0

Tribological Behaviour of AA-6063 Cast Using In-Situ Microwave Process By Taguchi Method & ANFIS Model 田口法和ANFIS模型原位微波铸造AA-6063的摩擦学性能

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062371

V. Gangwar, Sudhir Kumar, H. Singh

引用次数: 0

Effect of Laser Mode and Power on the Tribological Behavior of Additively Manufactured IN718 Alloy Fabricated by Direct Energy Deposition (DED) 激光模式和功率对直接能量沉积IN718合金摩擦学性能的影响

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062361

Ismael Tombakti, A. Adesina, Abdullah Alharith, Moataz M. Attallah, B. AlMangour

引用次数: 0

Dimensional discussion of traction force vector on ball/raceway interface and study of bearing dynamic behavior 滚珠/滚道界面牵引力矢量的量纲讨论及轴承动态特性研究

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062375

Shuaijun Ma, Yanjing Yin, Linbo Zhu, Ke Yan, Yongsheng Zhu

{"title":"Dimensional discussion of traction force vector on ball/raceway interface and study of bearing dynamic behavior","authors":"Shuaijun Ma, Yanjing Yin, Linbo Zhu, Ke Yan, Yongsheng Zhu","doi":"10.1115/1.4062375","DOIUrl":"https://doi.org/10.1115/1.4062375","url":null,"abstract":"\u0000 As a crucial component, rolling bearings directly determine the reliability of rotating equipment. However, current dynamic models for predicting the bearing performance either ignore the velocity and stress dispersion at the ball/raceway interface or fail to consider the spin moment generated within the interface. To address this issue, the discrete features of the velocity and stress distribution are considered in this paper, and the micro-element approach is used to construct formulas to obtain the traction vectors in two and three dimensions, respectively. Two bearing dynamic models are further developed for these two types of equations: one model considers the spin moment at the interface owing to unequal contact angles between the ball and the two raceways, while the other model ignores this moment. The reliability of these models is validated by comparison with experimental test results, including cage speed and oil film thickness. The predictions from the quasi-static model are used as theoretical values to compare the ability of the two models to simulate bearing performance under different operating conditions. The results show that the prediction results of the model considering the spin moment are closer to the theoretical values than those of the model ignoring this moment. However, the moment increases the friction at the ball/raceway interface, causing this model to underestimate the extent of bearing sliding.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49135410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved slicing technique for finite line contacts in the modelling of rolling element bearings 滚动轴承有限线接触建模中一种改进的切片技术

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062364

Di Yang, Xi Wang, Yu Hou

{"title":"An improved slicing technique for finite line contacts in the modelling of rolling element bearings","authors":"Di Yang, Xi Wang, Yu Hou","doi":"10.1115/1.4062364","DOIUrl":"https://doi.org/10.1115/1.4062364","url":null,"abstract":"\u0000 Mechanical system often involves the finite line contact of key components such as rolling element bearings and gear pairs. Different contact models have been developed to predict the load-displacement relationship and contact pressure distribution, but there usually exists a trade-off between the accuracy of simulation results and computational cost. An improved slicing technique is presented in this work. According to the half-space theory, a tri-linear fitting model is developed to express the load-displacement relationship and coupling behavior in slices of contact region, which is originally controlled by a spatial convolution. The improved slicing technique is thus formulated based on the tri-linear model. A modified Newton-Raphson algorithm is adopted to solve the free boundary problem of the improved slicing technique. The improved slicing technique is validated to be able to correctly predict the load-displacement relationships and the contact pressure distributions of different contact profiles, especially for contact pressure concentrations which other slicing techniques are unable to predict accurately. The computation speed of the proposed method is much faster than the semi-analytical method and is of the same order of other slicing technique. The high accuracy and low computational cost enable the proposed method to be applied in the on-line calculation of rolling element bearings and other sophisticated mechanical systems.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42480567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Lubricating Performance of the Bubbly Oil under High Shear Rate, Part 1: Generation Method and Viscosity Measurement of the Bubbly Oil 高剪切速率下气泡油的润滑性能研究，第一部分:气泡油的产生方法及粘度测量

IF 2.5 3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062366

Shuyun Jiang, Shaohua Li, Li Lu, Chibin Zhang

{"title":"Study on Lubricating Performance of the Bubbly Oil under High Shear Rate, Part 1: Generation Method and Viscosity Measurement of the Bubbly Oil","authors":"Shuyun Jiang, Shaohua Li, Li Lu, Chibin Zhang","doi":"10.1115/1.4062366","DOIUrl":"https://doi.org/10.1115/1.4062366","url":null,"abstract":"\u0000 Bubbly oil lubrication is a type of lubrication method which has a high potential for application. However, the lubricating performance of the bubbly oil has not been thoroughly considered. This paper aims to investigate the lubricating performance of the bubbly oil including generation of the bubbly oil, viscosity characteristics of the bubbly oil and the application study of the bubbly oil lubrication. Due to space limitation, the work is divided into two parts. Part 1 focuses on the generation method of the bubbly oil, observation of the bubbly oil and the measurement of viscosity characteristics under a high shear rate. Part 2 focuses on the application study of the bubbly oil lubrication in high-speed bearing. A generation method for the bubbly oil was proposed by a combination of the dispersed-air method and the pressurized dissolution one. An experiment setup for generating the bubbly oil, an observation system for the bubbly oil and a specially-designed viscometer for the bubbly oil were developed. The research results show that the generation method for the bubbly oil is of high efficiency and stability and the observation system is operational.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45461542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0