Industrial Lubrication and Tribology: Volume 70 Issue 1

A fast computing approach concerning recess pressure

Peng Liang, Changhou Lu, Fazhan Yang

This paper aims to provide a new method for fast calculation of the recess pressure for hydrostatic bearing compensated by orifice restrictor.

Matching the relationship between rotational speed and load-carrying capacity on high-speed and heavy-load hydrostatic thrust bearing

Xiao-dong Yu, Lei Geng, Xiao-jun Zheng, Zi-xuan Wang, Xiao-gang Wu

Rotational speed and load-carrying capacity are two mutual coupling factors which affect high precision and stable operation of a hydrostatic thrust bearing. The purpose of this…

An improved model on forecasting temperature rise of high-speed angular contact ball bearings considering structural constraints

De-xing Zheng, Weifang Chen, Miaomiao Li

Thermal performances are key factors impacting the operation of angular contact ball bearings. Heat generation and transfer about angular contact ball bearings, however, have not…

A numerical study on the contact fatigue life of a coated gear pair under EHL

Ye Zhou, Caichao Zhu, Huaiju Liu, Chaosheng Song, Zufeng Li

Coatings are widely used in gears to keep interface from wearing excessively. The purpose of this paper is to study the effect of coating properties and working conditions on the…

Analysis of bearing failures in a typical high-power marine gearbox

Haigang Gu, Guang Feng, Yonggang Lin, Chaozhu Wang

This paper aims to analyze fatigue failures of a typical marine gearbox under harsh ocean conditions, and these failures are reasonably attributed to the bearing fretting fatigue…

Modelling the influence of velocity on wet friction-element friction in clutches

Yanzhong Wang, Chao Guo, Yuan Li, Guoxing Li

This study aims to establish a friction coefficient model relative to the rotation speed of a wet clutch engagement, which can predict friction coefficient under different stages…

Film thickness formation in nanoscale due to effects of elastohydrodynamic, electrostatic and surface force of solvation and van der Waals

Mohamed Abd Alsamieh

The purpose of this is to study the mechanism of an oil film thickness formation in the nanoscale. A polar lubricant of propylene carbonate is used as the intervening liquid…

Wear morphology analysis and structural optimization of cone bit bearing seals

Zhang Yi, Zhang Xiaodong, Chang Xueping, Wu Qian

This paper aims to clarify the relationship between the cone bit seal failure and the down-hole drilling fluid pressure and high temperature that occur during ultra-deep well…

Effect of recess depth on lubrication performance of annular recess hydrostatic thrust bearing by constant rate flow

Jun-peng Shao, Guang-dong Liu, Xiao-dong Yu, Yan-qin Zhang, Xiu-li Meng, Hui Jiang

The purpose of this paper is to describe a simulation and experimental research concerning the effect of recess depth on the lubrication performance of a hydrostatic thrust…

Research on the delamination wear properties of the pure carbon strip at the high-sliding speed with electric current

Hongjuan Yang, Lin Fu, Yanhua Liu, Weiji Qian, Bo Hu

This paper aims to investigate the delamination wear properties of a carbon strip in a carbon strip rubbing against a copper wire at the high-sliding speed (380 km/h) with or…

A novel technique to compute static and dynamic performance characteristics of aerostatic thrust bearing

Saurabh Kumar Yadav, Arvind Kumar Rajput, Nathi Ram, Satish Chandra Sharma

This study aims to analyze the dynamic performance of aerostatic thrust bearing for different geometries of recess. Different geometries of recess of equal recess area, i.e…

Optimization of depositing uniform and wear-resistant diamond films on massive mechanical seals

Yun He, Fanghong Sun, Xuelin Lei

This study aims to obtain diamond-coated mechanical seals with improved sealing performance and considerable cost. To achieve this purpose, the study focuses on depositing…

Preparation and tribological properties of BN/calcium borate nanocomposites as additive in lubricating oil

Yanfei Yang, Xiaobo Wang, Sen Mei, Xing Zhu, Shiqiang Chen, Peng Xiong, Zhihai Hu, Kun Xiong, Dong Song Yuan

The purpose of this paper is to investigate the tribological performance and mechanisms of BN/calcium borate nanocomposites (BCBNs) as additives in lubricating oil.

Experimental and numerical analysis of a self-circulating oil bearing system for gear pumps

Mo Jintao, Gu Chaohua, Pan Xiaohong, Zheng Shuiying, Ying Guangyao

For moderate pressure and high pressure gear pumps, the temperature failure problem of bearings is now of considerable concern because of their heavy loads. However, the compact…

Tribological effects of laser surface texturing and residual stress

Shuwen Wang, Feiyan Yan, Ao Chen

The purpose of this paper is to investigate the tribological effects of laser surface texturing (LST) and residual stress on functional surfaces.

Grease thermal elastohydrodynamic lubrication properties of tripod sliding universal couplings

Ye Zhou, Degong Chang, Songmei Li

This paper aims to improve the grease thermal elastohydrodynamic lubrication (TEHL) properties of the tripod sliding universal coupling (TSUC) under automotive practical…

Effect of axial piston pin motion on tribo-dynamics of piston skirt-cylinder liner system

Fanming Meng, Minggang Du, Xianfu Wang, Yuanpei Chen, Qing Zhang

The purpose of this study is to investigate the effects of the axial piston pin motion on the tribological performances of the piston skirt and cylinder liner vibration for an…

Solid lubrication with MoS2-Ti-C films for high-vacuum applications in a nuclear fusion experimental device

Shanshuang Shi, Huapeng Wu, Yuntao Song, Heikki Handroos

This paper aims to present a study on composite coating films for solid lubrication applied on the surface of bearings and gears, which are exposed to the vacuum vessel of a…

Analysis of mixed lubrication of RV reducer turning arm roller bearing

Zhenhua Zhang, Jiaxu Wang, Guangwu Zhou, Xin Pei

This paper aims to solve the lubrication failures in the turning arm bearing of RV reducer, give some help in perfecting the bearing structure design and provide theoretical basis…

Tribological characterization on friction brake in continuous braking

Jiusheng Bao, Yan Yin, Lijian Lu, Tonggang Liu

The purpose of this study is to establish an effective method for characterizing the tribological properties of friction brakes during continuous braking because they have direct…

Quantitative structure tribo-ability relationship of ultra-high molecular weight polyethylene modified by inorganic compounds

Xinlei Gao, Tingting Wang, Zhong Cheng

Ultra-high molecular weight polyethylene (UHMWPE) has an excellent performance and application value; however, as a tribological material, its main drawback is its poor…

Dynamic analysis of a tapered roller bearing

Sier Deng, Jinfang Gu, Yongcun Cui, Wenhu Zhang

This study aims to analyze the roller dynamic characteristics and cage whirling of tapered roller bearing considering roller tilt and skew which provide a theoretical basis for…

Stability characteristics of lubricating film in mill oil-film bearings

Jianmei Wang, Zhixiong Li, Sadoughi Mohammadkazem, Min Cai, Jianfeng Kang, Yanan Zhang

The stability characteristics of an oil film directly influence the safety and service life of mill oil-film bearings. However, very limited work has been done to address the…

A mass-conserving algorithm for piston ring dynamical lubrication problems with cavitation

Zhenpeng He, Wenqin Gong, Weisong Xie, Guichang Zhang, Zhenyu Hong

Piston ring dynamic problem plays an important role in the lubricant characteristics of a reciprocating engine, which lead to engine wear and the increased consumption of…

Investigations on influence of groove shapes for the journal bearing in high-speed and heavy-load press system

Yu Chen, Yu Sun, Chunping Cao

The purpose of this study is to investigate the hydrodynamic characteristics of journal bearings in a high-speed and heavy-load press system by considering thermal influence and…