Optical analysis of ball-on-ring mode test rig for oil film thickness measurement

Zhang, Yaoguang; Wang, Wenzhong; Zhang, Shengguang; Zhao, Ziqiang

doi:10.1007/s40544-016-0127-5

Cited by 16 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under high-speed conditions, traditional interference image measurements yield lower results. Highquality interference images under high-speed, heavy-load conditions have been obtained using a ball-ring contact device (Zhang et al, 2016). The combination of optical interference technology and the windowed energy centroid method has significantly increased the measurement accuracy of lubricant thickness in bearings while avoiding errors in interference imaging (Deng et al, 2023).…”

Section: Optical Interference Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A comprehensive review of non-destructive methods for bearing lubricating oil film thickness measurement

Shang,

Sun,

Cai

2024

ILT

View full text Add to dashboard Cite

Purpose The purpose of this study is to investigate the application of non-destructive testing methods in measuring bearing oil film thickness to ensure that bearings are in a normal lubrication state. The oil film thickness is a crucial parameter reflecting the lubrication status of bearings, directly influencing the operational state of bearing transmission systems. However, it is challenging to accurately measure the oil film thickness under traditional disassembly conditions due to factors such as bearing structure and working conditions. Therefore, there is an urgent need for a nondestructive testing method to measure the oil film thickness and its status. Design/methodology/approach This paper introduces methods for optically, electrically and acoustically measuring the oil film thickness and status of bearings. It discusses the adaptability and measurement accuracy of different bearing oil film measurement methods and the impact of varying measurement conditions on accuracy. In addition, it compares the application scenarios of other techniques and the influence of the environment on detection results. Findings Ultrasonic measurement stands out due to its widespread adaptability, making it suitable for oil film thickness detection in various states and monitoring continuous changes in oil film thickness. Different methods can be selected depending on the measurement environment to compensate for measurement accuracy and enhance detection effectiveness. Originality/value This paper reviews the basic principles and latest applications of optical, electrical and acoustic measurement of oil film thickness and status. It analyzes applicable measurement methods for oil film under different conditions. It discusses the future trends of detection methods, providing possible solutions for bearing oil film thickness detection in complex engineering environments.

show abstract

Section: Optical Interference Methodsmentioning

confidence: 99%

“…Under high-speed conditions, traditional interference image measurements yield lower results. High-quality interference images under high-speed, heavy-load conditions have been obtained using a ball-ring contact device (Zhang et al. , 2016).…”

Section: Optical Measurement Methodsmentioning

confidence: 99%

A comprehensive review of non-destructive methods for bearing lubricating oil film thickness measurement

Shang,

Sun,

Cai

2024

ILT

View full text Add to dashboard Cite

show abstract

“…Because the optical measurement method cannot be applied for real bearings, the central oil film thickness obtained from the ultrasonic measurement test are compared with the theoretical values calculated by empirical formula (Zhang et al , 2016; Li et al , 2014). The theoretical values of the central film thickness are given by Yang Peiran and Wen Shizhu’s equation (3).…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…Foord et al (1968) evaluated the effect of load (giving stresses to 100,000 psi) and speed and viscosity on optical measurement. Zhang et al (2016) succeeded in measuring the film thickness at high-speeds conditions. However, the electrical method has limitations in application occasions and cannot meet the requirements measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

An improved method for film thickness measurement of cylindrical roller bearings based on a straight-beam probe

Liu²,

Zhou³

et al. 2023

ILT

View full text Add to dashboard Cite

Purpose Considering the industrial site environment and installation requirements, the straight-beam ultrasound probe with easy installation and good coupling agent adaptability is adopted to replace the traditional water immersion focusing probe for film thickness measurement in cylindrical roller bearings. The straight-beam probe has a large echo receiving range, which will result in measurement regions overlapping and bring about large measurement errors. In this paper, an improved measurement method for film thickness of cylindrical roller bearing with the straight-beam probe is developed. Design/methodology/approach An improved method is proposed to enhance the spatial resolution of the straight-beam probe. By introducing a correction coefficient based on the percentage of the effective measurement area, the method improves the measuring accuracy successfully. Findings The experimental results demonstrate that the lubricant-film thickness can be measured to reasonable accuracy by this method and have a better agreement with the theoretical film thickness solutions. Originality/value This paper used analytical method and model that is helpful for the improvement of the spatial resolution, which has great influence on the measuring accuracy, is mainly determined by the echo reflection area size of the ultrasound transducer.

show abstract

“…All the above achievements benefited from the improved optical interference techniques developed by the above mentioned tribologists. Moreover, similar optical technology developed by Guo et al [39] and Zhang et al [40] on the basis of the ROII method [22] can also be used to investigate the TFL characteristics with a resolution of 1 nm.…”

Section: Tflmentioning

confidence: 99%

Molecular behaviors in thin film lubrication—Part one: Film formation for different polarities of molecules

et al. 2019

View full text Add to dashboard Cite

There are three unsolved problems in thin film lubrication (TFL) since it was proposed 20 years ago, i.e., the determination of the type of molecules that can enter the contact region efficiently during sliding, the orientation of molecules in the contact region, and the effect of solid surfaces on the liquid molecular orientation in TFL. In order to answer the first two questions, an in situ measurement system comprising a self-designed Raman microscopy and relative optical interference intensity (ROII) system was set up to study the molecular behaviors. A variety of binary mixtures were used as lubricants in the test, and the concentration distribution profile and orientation of the additive molecules in TFL were characterized. The molecular behavior was determined via a combination of shearing, confinement, and surface adsorption. Furthermore, the difference in molecular polarity resulted in different competing effect of surface adsorption and intermolecular interaction, the influence of which on molecular behavior was discussed. Polar additive molecules interacted with the steel surface and exhibited an enrichment effect in the Hertz contact region when added into a nonpolar base oil. No enrichment effect was observed for nonpolar molecules that were added into the nonpolar base oil and polar molecules added into polar base oil. The enrichment of additive molecules enhanced the film-forming ability of the lubricant and resulted in a reduction in the friction coefficient of up to 61%. The orderly arrangement of the additive molecules was another reason for the friction-reducing. A binary multilayer model was proposed to illuminate the molecular behavior in the TFL, and the model was supported by contrary experiment results in elastohydrodynamic lubrication. This research may aid in understanding the nanoscale lubrication mechanism in TFL and the development of novel liquid lubricants.

show abstract

Optical analysis of ball-on-ring mode test rig for oil film thickness measurement

Cited by 16 publications

References 13 publications

A comprehensive review of non-destructive methods for bearing lubricating oil film thickness measurement

A comprehensive review of non-destructive methods for bearing lubricating oil film thickness measurement

An improved method for film thickness measurement of cylindrical roller bearings based on a straight-beam probe

Molecular behaviors in thin film lubrication—Part one: Film formation for different polarities of molecules

Contact Info

Product

Resources

About