A study of inlet temperature models of a large size tilting thrust bearing comparison between theory and experiment

Yang, Shifu; Li, Chao; Jiang, Mulong; Pei, Shiyuan

doi:10.1016/j.triboint.2019.105881

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…Meanwhile, insufficient cooling or excessive heating causes thermal deviations, leading to structural deformations of the film thickness. The aforementioned three factors are usually coupled as a thermoelastic problem, which must be solved to determine the acceptable range of loads and errors [173]. For this purpose, the development process should be preceded by numerical simulations.…”

Section: Influences Of Structural Deformationmentioning

confidence: 99%

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

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Fluid lubricated bearings have been widely adopted for supporting components of high-end equipments in the field of metrology, semi-conductor, aviation, strategic defense, ultra-precision manufacturing, medical treatment and power generations. These fields all involve extreme working conditions such as ultra-high moving precision, ultra-high rotation speed, ultra-heavy bearing load, ultra-high environmental temperature, high radiation and high vacuum, which present challenges for the design and optimization of reliable fluid lubricated bearings. Breakthrough of any related bottlenecks will promote the development course of high-end equipments. To further promote the advancement of high-end equipments, this paper reviews the design and optimization of fluid lubricated bearings operated with typical extreme working performances. Targeting on the realization of extreme working perfor mances, the current challenges, the current solutions, the underlying deficiencies and the promising developing directions regarding to the design and optimization of fluid lubricat ed bearings are systematically pointed out. This paper can provide guidance for choosing suitable fluid lubricated bearings and optimizing their structures based on required extremeworking performances.

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Section: Influences Of Structural Deformationmentioning

confidence: 99%

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Zhang,

Huang,

Chen

et al. 2024

Int. J. Extrem. Manuf.

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show abstract

“…Lubrication leakage was also observed during the test, and the bearing weight before and after the test was determined to obtain the lubrication weight loss. An increase in temperature causes a decrease in grease viscosity [20], leading to easier leakage. After fitting, the average rate of lubrication leakage satisfied the Arrhenius equation [21,22]:…”

Section: Effect Of Voltage Amplitude On Current-carrying Tribological...mentioning

confidence: 99%

Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages

Lou,

Song,

Ren

et al. 2024

Materials

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Corrugated damage to bearings is a common fault in electrical facilities such as new energy vehicles, wind power, and high-speed railways. The aim of this article is to reveal the microscopic characteristics and formation mechanism of such damages. The corrugation with alternating “light” and “dark” shape was produced on GCr15 bearing races in the experimental conditions. Compared to the light area, the dark area (in the images generated by optical microscope) has more severe electrical erosion, lower hardness, more concave morphology, and lower oxidation. As the voltage increases, the width of the corrugation, the height difference between corrugation, and surface roughness all increase. It is believed that the formation of corrugated damage requires a sufficiently high voltage to induce the periodic destruction and reconstruction of the lubrication film. When the bearing is in a metal-lubrication film–metal contact state, the high voltage causes the lubrication film to break down and induce electrical erosion. Then, the contact area is in metal–metal contact, and the surface is mainly damaged by mechanical rolling. After the reconstruction of lubrication film, the next round of electrical erosion begins. The results are helpful for a deeper understanding of the mechanism of bearing erosion in electrical application.

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“…Later, Li et al 20,21 developed a novel toroidal CVT with a logarithmic surface to eliminate the spin loss theoretically, which proves that the efficiency of the logarithmic CVT is higher than that of the halftoroidal CVT; several zero-spin schemes of the rollerdisk type traction drive were provided based on the principle of zero-spin. 22,23 Generally, the maximum pressure in contact areas can reach the GPa level, and the lubricant exhibits non-Newtonian behavior under such high pressures. 24,25 Tevaarwerk and Johnson 26 studied the elastic effects with the proposed J-T model and indicated that the traction drive performance largely depended on the rheological properties.…”

Section: Introductionmentioning

confidence: 99%

Rehabilitation robot joint performance evaluation of a zero-spin traction drive with non-Newtonian fluid considered

Shuaidong,

Guanghui,

Renqiang

et al. 2024

Advances in Mechanical Engineering

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In this study, a zero-spin cone-roller traction drive (CRTD) is presented for the joints transmission system in rehabilitation robots due to its high transmission performance and characteristics of overload protection. It can achieve safe interactions among humans, rehabilitation robots, and the environment, making it a potential substitute for traditional gear-based transmission systems. The performance of CRTD, especially efficiency, is studied in this paper based on an elastohydrodynamic lubrication (EHL) model with the considerations of the non-Newtonian effect. The results demonstrate that the overall efficiency differs in different stages, reaching a maximum value of 95%. The overload protection activates when there is a sharp drop in efficiency, and the overload threshold can be identified by the efficiency, which may provide guidance for operation and optimization.

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A study of inlet temperature models of a large size tilting thrust bearing comparison between theory and experiment

Cited by 10 publications

References 12 publications

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Design and optimization of fluid lubricated bearings operated with extreme working performances—a comprehensive review

Formation of Corrugated Damage on Bearing Race under Different AC Shaft Voltages

Rehabilitation robot joint performance evaluation of a zero-spin traction drive with non-Newtonian fluid considered

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