...Chan Xu; Yunqi Tong; Tonghai Wu Purpose This study aims to characterize the lubrication condition under sliding-rolling contact using three indicators, including the oil film thickness and two perpendicular (vertical and tangential) vibrations. The lubrication deterioration can then be detected...

...-liner friction-vibration experimental platform and dynamic viscoelastic test of liner. Findings The results show that: With increasing excitation frequency, the friction between the three liner materials (G30, K25, PU) and the wire rope decreased, and the wear of the surface shape of the liners...

...Kai Xu; Ying Xiao; Xudong Cheng Purpose The purpose of this study is to investigate the effects of nanoadditive lubricants on the vibration and noise characteristics of helical gears compared with conventional lubricants. The experiment aims to analyze whether nanoadditive lubricants can...

...Xin Qin; Xiaojing Wang; Zhengmao Qiu; Yifan Hao; Yan Zhu Purpose This study aims to present a novel hydrostatic squeeze film-metal mesh journal bearing (HS-MMJB), which uses both hydrostatic squeeze film damper (HSFD) and metal mesh damper (MMD), to suppress the vibration of rotor-bearing systems...

...Fenglin Zhu; Fan Yu Jie; Li bin; Xu Cheng Cheng Purpose This study aims to establish the friction vibration model. Design/methodology/approach The friction vibration experiment was carried out on a pin disk friction tester. The causes of friction vibration are discussed, and the friction...

... is established. A Stribeck-type friction model is applied to this model to correlate the frictional velocity, pressure and friction force. The stability of pad vibration is analysed by analysis methods. A new stability evaluation parameter is proposed to study the influence of radial stiffness on stability...

... analysis based on the finite difference method is given and an experiment focuses on critical speed identification is carried out. Findings The theoretical calculation results indicate that the critical speed is near to 800 rpm and there is no large vibration amplitude round working speed (1,500 rpm...

.../publon/10.1108/ILT-03-2020-0085/ 06 03 2020 13 03 2020 16 03 2020 © Emerald Publishing Limited 2020 Emerald Publishing Limited Licensed re-use rights only Vibration Temperature Sliding bearing Frequency spectrum Rolling bearing test rig Shaft orbit Rolling...

... the linear and nonlinear methods when the unbalanced force is small. The effects of unbalance eccentricity ratio and electric field on the vibration response and the bearing transmitted force are investigated using the nonlinear models. Findings The results of simulation performed that the harmonics...

...Zhiming Zhao; Feng Ji; Yongsheng Guan; Xiaoyang Yuan Purpose High power rotating machinery requires large diameter bearings that can perform under extreme conditions. Vibrations and critical speeds of rotor supported by tilting pad journal bearing (TPJBs) exceeding their design limits may cause...

... between two piston bodies. Findings The simulation results based on COMSOL indicate that cylinder vibration caused by self-adaptive piston is 15.9 times smaller than the one caused by a traditional piston. Originality/value The self-adaptive piston is superior to the traditional piston...

...Mohammad Hashemi; Mir Saeed Safizadeh Purpose The purpose of this paper is to detect gears' faults with an automatic decision‐making process and find a reliable method to detect faults on gear systems using a composition of conventional methods. Design/methodology/approach First, the vibration...

...Aparecido Carlos Gonçalves; Linilson Rodrigues Padovese Purpose The purpose of this paper is to provide information on lubricant contamination by biodiesel using vibration and neural network. Design/methodology/approach The possible contamination of lubricants is verified by analyzing...

... apparatus having facility of vibrating the test samples at different directions, amplitudes and frequencies was designed and fabricated. The natural frequency of the set‐up was varied by adding dead loads of the set‐up from 0 to 50 kg. At each added load, the wear rate has been measured. Findings...

... of the experimental set‐up. Design/methodology/approach Experimental vibration is generated artificially in such a way that direction, amplitude, and frequency of vibration can be controlled. Findings The presence of natural frequency of vibration indeed affects the friction force considerably. The natural...

...M.A. Chowdhury; M.M. Helali Purpose The purpose of this paper is to investigate experimentally the effect of external vertical vibration on wear property of mild steel. Design/methodology/approach A pin‐on‐disc apparatus capable of vibrating the test samples in a vertical direction is designed...

...Mohammad Asaduzzaman Chowdhury; Maksud Helali Purpose The purpose of this paper is to present the frictional behaviour of composite materials under external horizontal vibration. Variation of friction coefficient is investigated experimentally when mild steel pin slides on composite materials...

...Mohammad Asaduzzaman Chowdhury; Maksud Helali Purpose The purpose of this paper is to investigate experimentally the effect of external vertical vibration on the friction property of mild steel, glass fiber‐reinforced plastic and cloth‐reinforced ebonite. Design/methodology/approach A pin...

... Vibration Neural nets Condition monitoring Recently, rotating machineries are widely used in industry and are of special importance. In this kind of machineries, bearings are very important parts that need precise condition monitoring. Higher reliability and safety demands require better fault...

...Aparecido Carlos Gonçalves; Rodrigo Carvalho Cunha; Daniel Fabiano Lago Purpose This paper aims to provide information on wear debris on oil and vibration analysis as predictive maintenance techniques. Design/methodology/approach The estate of a reducer is verified by analyzing the vibration...