Lubrication Condition Monitoring in EHD Line Contacts of Thrust Needle Roller Bearing Using the Electrical Impedance Method

Maruyama, Taisuke; Radzi, Fathin Sakinah Mohd; Sato, Tsutomu; Iwase, Shunsuke; Maeda, Masayuki; Nakano, Ken

doi:10.3390/lubricants11050223

Cited by 15 publications

(23 citation statements)

References 39 publications

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“…The method has been successfully applied to measure the failure rate of high-speed bearings with elliptical and point contacts and quantitatively assess the breakdown rate (Maruyama et al, 2019). In addition, the resistance measurement method enables real-time monitoring of the lubrication status of needle roller bearings (Maruyama et al, 2023). Considering the relationship between resistance and lubrication characteristics, the output characteristics of friction-electric bearing sensors are established for resistance loading (Qin et al, 2023).…”

Section: Resistance Measurement Methodsmentioning

confidence: 99%

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

Shang,

Sun,

Cai

2024

ILT

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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.

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Section: Resistance Measurement Methodsmentioning

confidence: 99%

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

Shang,

Sun,

Cai

2024

ILT

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“…In 2023, Maruyama et al [44] monitored the temporal evolution of the electrical impedance of a thrust needle roller bearing. Initially, the film thicknesses obtained from the impedance method were observed to be lower than those predicted by Hamrock and Dowson.…”

Section: State Of the Artmentioning

confidence: 99%

“…In the current study, we focus on the direct comparison between the capacitancebased approach of Jablonka et al [29,30] and the impedance-based approach of Maruyama et al [42][43][44] for determining the film thickness in the identical EHL line contacts of cylindrical roller thrust bearings (CRTB). The results of both approaches are compared, and their accuracy and reliability are evaluated.…”

Section: Goal Of the Papermentioning

confidence: 99%

Electrical Impedance Spectroscopy for Precise Film Thickness Assessment in Line Contacts

Manjunath,

Hausner,

Heine

et al. 2024

Lubricants

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In this article, we focus on utilising electrical impedance spectroscopy (EIS) for the assessment of global and contact impedances in roller bearings. Our primary objective is to establish a quantitative prediction of lubricant film thickness in elasto-hydrodynamic lubrication (EHL) and investigate the impedance transition from ohmic to capacitive behaviour as the system shifts from boundary lubrication to EHL. To achieve this, we conduct measurements of electrical impedance, bearing and oil temperature, and frictional torque in a cylindrical roller thrust bearing (CRTB) subjected to pure axial loading across various rotational speeds and supply oil temperatures. The measured impedance data is analysed and translated into a quantitative measure of lubricant film thickness within the contacts using the impedance-based and capacitance-based methods. For EHL, we observe that the measured capacitance of the EHL contact deviates from the theoretical value based on a Hertzian contact shape by a factor ranging from 3 to 11, depending on rotational speed, load, and temperature. The translation of complex impedance values to film thickness, employing the impedance and capacitance method, is then compared with the analytically estimated film thickness using the Moes correlation, corrected for inlet shear heating effects. This comparison demonstrates a robust agreement within 2% for EHL film thickness measurement. Monitoring the bearing resistance and capacitance via EIS across rotational speeds clearly shows the transition from boundary to mixed lubrication as well as the transition from mixed lubrication to EHL. Finally, we have observed that monitoring the electrical impedance appears to have the potential to perform the run-in of bearings in a controlled way.

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“…This method can be developed to monitor the amount of bearing lubricant remaining, which is of great help in avoiding bearing wear loss. Maruyama et al [214] proposed a resistive resistance method for monitoring the thickness and breakdown ratio of the oil film in an elastic hydrodynamic line contact within a bearing (Figure 23). They found at the beginning of the experiment that the bearing oil film thickness was less than the theoretical value and the breakdown ratio was greater than zero (indicating that the bearing was in mixed lubrication).…”

Section: Analysis Of Wind Power Bearing Lubrication Research Based On...mentioning

confidence: 99%

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Peng,

Zhao,

Shangguan

et al. 2023

Coatings

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With the significant penetration of wind generation, wind turbines require higher and higher lubrication performance for bearings. To improve the lubrication performance of wind power bearings, this study takes wind power bearings as the research object and comprehensively analyzes the wear forms of wind power bearings as well as intelligent lubrication methods. Firstly, the main roles and wear forms of wind turbine bearings are sorted out and analyzed. Secondly, the common lubrication problems of wind power bearings are analyzed from the bearing grease selection, lubrication mode, and lubrication status, highlighting the important influence of lubrication on bearings. Thirdly, the wind turbine bearing wisdom lubrication method research and organization, mainly including the wind power generation bearing lubrication materials, lubrication devices and monitoring methods, and other issues of research and analysis. Finally, current challenges and future development directions are summarized, which are designed to provide theoretical reference and technical support for the related research and engineering practice in the field of wind power engineering.

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Lubrication Condition Monitoring in EHD Line Contacts of Thrust Needle Roller Bearing Using the Electrical Impedance Method

Cited by 15 publications

References 39 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

Electrical Impedance Spectroscopy for Precise Film Thickness Assessment in Line Contacts

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

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