Film-Thickness Identification Method and Lubrication Characteristic Experiment of Full-Size Water-Lubricated Stern Bearing under Offset Load

Li, Jinjun; Ouyang, Wu; Liu, Qilin; Zhang, Zhuo; Zhang, Yan

doi:10.3390/s22103670

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…The model test is used to acquire the performance test of shrinkage bearings or full-size bearings [42], the appraisal test device [82] is used to simulate the real-life condition of a real propulsion shaft system and evaluate whether the bearing meets the design requirements. According to different loading methods, the radial bearing test device could be divided into positive [83] and inverted types.…”

Section: Test Devices Of Wlbsmentioning

confidence: 99%

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

et al. 2023

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With the development of green tribology in the shipping industry, the application of water lubrication gradually replaces oil lubrication in stern bearings and thrust bearings. In terms of large-scale and high-speed ships, water-lubricated bearings with high performance are more strictly required. However, due to the lubricating medium, water-lubricated bearings have many problems such as friction, wear, vibration, noise, etc. This review focuses on the performance of marine water-lubricated bearings and their failure prevention mechanism. Furthermore, the research of marine water-lubricated bearings is reviewed by discussing its lubrication principle, test technology, friction and wear mechanism, and friction noise generation mechanism. The performance enhancement methods have been overviewed from structure optimization and material modification. Finally, the potential problems and the perspective of water-lubricated bearings are given in detail.

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Section: Test Devices Of Wlbsmentioning

confidence: 99%

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

et al. 2023

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“…The lubricant film thickness sensor monitors the real-time thickness of the lubricant film and generates the appropriate commands when the film thickness at the interacting surfaces falls below the prescribed value. There are many different lubricant film thickness sensors available such as eddy current sensors [81]., ultrasound transducers [82][83][84], relative optical interference intensity (ROII) [85] etc. Ultrasound reflectometry is the most common use of ultrasound transducers in lubrication film monitoring.…”

Section: For Planetary and Low-speed Bearingsmentioning

confidence: 99%

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

Sathyan¹

2023

Tribol. Ind.

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Wind turbines have improved in terms of reliability over the past ten years, but they still experience crucial and expensive tribological issues that shorten their intended lifespans. Most turbines require significant repairs or complete replacements of the tribo components in the 5-to 7-year range. The pricey gearboxes have high repair rates, which greatly raises the operating costs for wind turbines and the cost of wind energy. Currently, various bearings in the turbine are lubricated by automatic lubrication systems with the necessary oil filters to ensure cleanliness. The commonly used lubrication methods for wind turbine bearings are centralized lubrication, oil-air lubrication, oil mist lubrication, and oil bath lubrication. There are similarities between wind turbines and spacecraft-moving mechanical systems. Most spacecraft are designed to work for decades in a remote environment without periodic maintenance. Spacecraft use efficient lubrication systems for their moving mechanical systems to provide the required lubricant to the bearings for the required life. Depending on the lubrication requirements, proven active and passive lubrication systems are employed in spacecraft. This paper reviews the lubrication issues of the wind turbine in comparison with the spacecraft and proposes a few lubrication systems that are successfully performing in spacecraft, intending to improve the reliability of wind turbine tribo-systems.

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Data-Driven Model of the Distribution Lubrication on Water-Lubricated Bearing Under Severe Operating Conditions

Ouyang

Liu

Liang

et al. 2023

Journal of Tribology

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To resolve the contradiction between the method used to design bearings based on traditional lubrication theory and the actual state of service of water-lubricated bearings (WLBs), this paper proposes a data-driven method for the model of the distribution of lubrication on WLBs. A full-sized WLB test bench featuring multi-sectional pressure due to the film of water and a system to measure the axis of the orbit was built to perform tests under severe operating conditions (75 kN, 25~220 r/min). A dataset of the operating parameters of the bearings was obtained based on the results of tests under varying operating conditions. An artificial neural network algorithm was applied to train the proposed model, and its capabilities of prediction and extrapolation were systematically analyzed by using samples with different ranges of values. The proposed model was then used to examine the distributed characteristics of lubrication of the WLB to investigate the effects of variations in speed and elevation on bearing performance. The results showed that it has satisfactory capabilities of prediction and extrapolation under the same elevation and variation in speed. Under severe operating conditions, two significant peaks of pressure of the film of water appeared at both ends of the WLB, and variations in the speed of the shaft and the elevation of the bearings had prominent effects on the state of distributed lubrication of the bearings. The results reported here provide a new approach to designing and optimizing the structure of WLB.

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Film-Thickness Identification Method and Lubrication Characteristic Experiment of Full-Size Water-Lubricated Stern Bearing under Offset Load

Cited by 3 publications

References 31 publications

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

Data-Driven Model of the Distribution Lubrication on Water-Lubricated Bearing Under Severe Operating Conditions

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