...Yanshuang Wang; Zhiwei Feng; Xin Cao; Mingyu Zhang Purpose This study aims to the influence of grease consistency on oil film thickness, friction coefficient (COF) and wear. A novel vibration evaluation model for grease performance is proposed. Design/methodology/approach Measurements...

...Yanshuang Wang; Zhiwei Feng; Xin Cao; Mingyu Zhang Purpose This study aims to the influence of grease consistency on oil film thickness, friction coefficient (COF) and wear. A novel Replenishment evaluation model for grease performance is proposed. Design/methodology/approach Measurements...

... in prediction. In particular, it is shown that the procedure is capable of capturing the effect of ageing of two commercially available greases on their film thickness. Applying the proposed method in real time enables the development of digital twins of the associated machines. Originality/value The sensor...

...Yuhai Shen; Yanshuang Wang; Jianghai Lin; Pu Zhang; Xudong Gao; Zijun Wang Purpose This paper aims to determine a suitable anti-wear and friction-reducing compounding additive for lithium greases (LG) by investigating the effects of three single additives potassium borate (PB), zinc dialkyl...

... temperatures as well as under dry conditions and under lubrication by different greases. Thereby, the frictional behavior was measured in situ, and the wear losses were analyzed by means of laser scanning microscopy. Findings It was shown that friction and wear can behave in a contrasting way...

...Qunfeng Zeng; Hao Jiang; Qi Liu; Gaokai Li; Zekun Ning Purpose This paper aims to introduce a high-temperature grease design method assisted by back propagation neural network (BPNN) and verify its application value. Design/methodology/approach First, the grease data sets were built by sorting...

...Jiabao Pan; Huaibiao Wu; Ao Wang; Qingwen Dai; Xiaolei Wang Purpose This paper aims to investigate the influence of high-temperature thermal action on grease performance from the angle of film-forming performance. Design/methodology/approach A static thermal aging method was used to prepare...

...Lidan Yao; Lixin Wang; Haining Yang; Chuan Li; Hui Song; Xianguo Hu Purpose This paper aims to investigate the influence of stearate types on the thickening ability, dropping point and fiber structure of greases. Design/methodology/approach Several greases were prepared from polyolefins...

... as an additive on lithium-based grease. The experiments of nanogrease are examined in different values of shear stress, apparent viscosity, temperature and shear rate using Brookfield Programmable Rheometer DV-III ULTRA and characterized by high-resolution transmission electron microscope (HRTEM) and X-ray...

...Zujian Shen; Fei Geng; Xinxin Fan; Zhichen Shen; Haiyan Wang Purpose This paper aims to investigate and prepare the composite polyurea greases with excellent thermal stability and tribological properties. Design/methodology/approach In this paper, composite Ba-based (Ba, barium) tetra-polyurea...

...Liu Hongtao; Ji Hongmin; Hong Haiping; Hammad Younes Purpose – The purposes of this paper are to prepare the carbon nanotube (CNT) grease, to contrast the tribology properties of the CNT grease with the original grease and to find the lubricating mechanism of the CNT grease. Design...

...Tiedan Chen; Yanqiu Xia; Zhilu Liu; Zeyun Wang Purpose – The mixture of attapulgite and bentonite was used as a thickener, and polyalphaolefin was used as the base oil to prepare the new lubricating grease. Some solid particles such as Polytetrafluoroethene (PTFE), MoS2, nano-calcium carbonate...

...Zenon Pawlak; Tadeusz Kałdoński; Michal Lisewski; Wieslaw Urbaniak; Adekunle Oloyede Purpose The purpose of this paper is to study the sliding and the vibrating fretting tests mechanism of h‐BN micro‐particles when used as a lubricating grease‐2 additive. Design/methodology/approach...

...Jan Lundberg; Sven Berg The process of finding the ultimate grease is described in this report using an example from railway applications. This example includes steps such as a requirement list, field tests, laboratory tests and an evaluation method. The example deals with the problems discovered...

...Ryszard Czarny Describes the structure and rheological characteristics of soap based greases and how the thickener retains the oil phase. Illustrates the thixotropic behaviour and effect of time of shearing on friction, film thickness, noise energy loss in grease lubricated contacts. Shows how...

...Bill Wilson Details the increasing use of BP polybutene hydrocarbons as clean, non‐polluting lubricants or viscosity index improvers for two stroke engines, compressors, metalworking fluids, gear and hydraulic oils and greases. Shows polybutene’s compatibility with mineral and synthetic oils...

...T.W. Dicken Describes the requirements for biodegradability, defines the different terms and lists the various tests used. Outlines how greases can cause pollution. Details the main primary biodegradability test for lubricants and how to formulate greases to optimize breakdown in the environment...