Thermal Dynamic Exploration of Full-Ceramic Ball Bearings under the Self-Lubrication Condition

Tian, Junxing; Wu, Yuhou; Sun, Jian; Xia, Zhongxian; Ren, Kexuan; Wang, He; Li, Songhua; Yao, Jinmei

doi:10.3390/lubricants10090213

Cited by 16 publications

(7 citation statements)

References 23 publications

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“…With their superior performance, ceramic ball bearings occupy a position that cannot be ignored in many key technical fields. As a key component of the ceramic ball, its shape contour accuracy greatly affects the performance of bearings [ 1 , 2 , 3 ]. As an important basis for evaluating the rotation accuracy and interchangeability of bearings, higher spherical error and surface waviness deviation will lead to greatly reduced rotation accuracy and life of bearings.…”

Section: Introductionmentioning

confidence: 99%

Research on the Roundness Approximation Search Algorithm of Si3N4 Ceramic Balls Based on Least Square and EMD Methods

et al. 2023

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This paper aims to obtain the best shape accuracy evaluation algorithm for silicon nitride ceramic balls after lapping, and to extract the initial signal of the ball surface to improve the accuracy and reliability of the algorithm. The research methods of this paper are as follows: Firstly, an analysis of the uniform envelope of the lapping trajectory of ceramic balls is carried out to verify whether the lapping trajectory after processing can achieve a consistent envelope on the balls’ surface. On this basis, it is found through experiments that the standard deviation SD between the roundness deviations of different contour sections is small. The value is maintained at approximately 0.03 μm, and the roundness deviation can approximately replace the spherical deviation. Then the different contour sections of the sphere are sampled by the Taylor roundness instrument. Considering the uncertainty, the sampling points of different contour sections are averaged and used as the original signal of the sphere surface. Then the EMD method is used to process the signal to be detected on the sphere surface. The initial signal of the sphere surface is extracted by judging whether the number of ripples Kc obtained by decomposition is greater than the critical value. Then the initial signal is used as the input value of the approximation algorithm. Through the roundness deviation approximation algorithm based on the least square method, the given minimum approximation domain range is finely processed. The divided fine points are used as the center of the circle to intersect with the initial signal. The maximum, minimum, and range of each circle are calculated to obtain the roundness error based on the minimum circumscribed circle, the maximum inscribed circle, and the minimum region method. Finally, the calculated values are compared with those obtained by the traditional algorithm. The experimental results of this paper show that the algorithm is consistent with the roundness error measured by the instrument, compared with the mainstream evaluation criteria. In summary, the conclusions can be drawn as follows: Through a large number of experimental cases and comparative experiments, the algorithm has high accuracy and reliability. The research results of this paper have essential reference significance for accurately evaluating the shape accuracy of ceramic balls in actual production.

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Section: Introductionmentioning

confidence: 99%

Research on the Roundness Approximation Search Algorithm of Si3N4 Ceramic Balls Based on Least Square and EMD Methods

et al. 2023

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“…It was found that the coefficient of friction and the wear rate of silicon nitride balls of the silicon nitride friction substrate decreased continuously as the load increased; the coefficient of friction and wear were the first to increase and then decrease as the rotational speed increased (Wang et al, 2021).Tian Junxing studied the thermal distribution of full ceramic ball bearings under self-lubricating conditions. It was found that the load on the bearing under self-lubricating conditions is the main factor affecting the temperature rise of full ceramic ball bearing (Tian et al, 2022). Sun Jian studied the frictional lubrication performance of full ceramic ball bearings and found that the lubricant film thickness of full ceramic ball bearings was positively correlated with the bearing speed and negatively correlated with the bearing load.…”

Section: Introductionmentioning

confidence: 99%

“…Tian Junxing studied the thermal distribution of full ceramic ball bearings under self-lubricating conditions. It was found that the load on the bearing under self-lubricating conditions is the main factor affecting the temperature rise of full ceramic ball bearing (Tian et al , 2022). Sun Jian studied the frictional lubrication performance of full ceramic ball bearings and found that the lubricant film thickness of full ceramic ball bearings was positively correlated with the bearing speed and negatively correlated with the bearing load.…”

Section: Introductionmentioning

confidence: 99%

Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition

Sun,

Fang,

Yao

et al. 2023

ILT

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Purpose The study aims to the distribution rule of lubricating oil film of full ceramic ball bearing and improve its performance and life. Design/methodology/approach The paper established an analysis model based on the fluid–solid conjugate heat transfer theory for full ceramic ball bearings. The distribution of flow, temperature and pressure field of bearings under variable working conditions is analyzed. Meanwhile, the mathematical model of elastohydrodynamic lubrication (EHL) of full ceramic ball bearings is established. The numerical analysis is used to study the influence of variable working conditions on the lubricant film thickness and pressure distribution of bearings. The temperature rise test of full ceramic ball bearing under oil lubrication was carried out to verify the correctness of simulation results. Findings As the speed increased, the oil volume fraction in full ceramic ball bearing decreased and the surface pressure of rolling element increased. The temperature rise of full ceramic ball bearings increases with increasing speed and load. The lubricant film thickness of full ceramic ball bearing is positively correlated with speed and negatively correlated with load. The pressure of lubricating film is positively correlated with speed and load. The test shows that the higher inner ring speed and radial load, the higher the steady-state temperature rise of full ceramic ball bearing. The test results are in high agreement with simulation results. Originality/value Based on the fluid–solid conjugate heat transfer theory and combined with Reynolds equation, lubricating oil film thickness formula, viscosity temperature and viscosity pressure formula. The thermal analysis model and EHL mathematical model of ceramic ball bearings are established. The flow field, temperature field and pressure field distribution of the full ceramic ball bearing are determined. And the thickness and pressure distribution of lubricating oil film in the contact area of full ceramic ball bearing were determined. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2023-0126/

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“…Zhang et al [12] used the Hertz theory to establish the dynamic and thermal coupling model of ceramic bearing electric spindle, studied the influence of different temperatures, preload, and speed on bearing dynamic performance, and verified the accuracy of the dynamic and thermal coupling model through the electric spindle test platform. Tian et al [13] established a bearing heating model based on silicon nitride material, measured the bearing temperature by a bearing life testing machine, verified the correctness of the model, and used the friction and wear testing machine to analyze the temperature change trend between rolling elements and raceways with different precision. Chen et al [14] established a bearing lubrication and heat generation model under oil-air lubrication conditions based on the theory of high-speed rolling bearings and two-phase flow, and further studied the effects of oil supply, lubricating oil viscosity, load, and speed on bearing temperature rise.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of hybrid ceramic bearings with metal inner rings

2023

Archives of Thermodynamics

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For the sake of exploring the thermodynamic characteristics of hybrid ceramic bearings with metal inner rings in the application process, we established the mathematical model of bearings with metal inner rings based on the thermodynamics of bearings. The heat of the bearings, inner and outer raceway, and the deformation of bearings were calculated by the thermodynamic model. We used the bearing life testing machine to test the bearing load and speed. The consequences indicate that the temperature stability time of a hybrid ceramic bearing with the metal inner ring is about 6 hours after loading, and its temperature is about 1-2 • C higher than that of a metal bearing. Under the condition of a certain speed, the stable temperature of bearing operation improves with the enlargement of the load. Under the condition of a certain load, the bearing temperature also improves with the enlargement of bearing speed. The overall temperature trend of the bearing outer ring is unanimous with the overall temperature value calculated by the model. The maximum error is between 2.2 and 2.4 • C. The thermodynamic analysis of hybrid bearings with metal inner rings is conducive to a better study of the effect of bearing material characteristics on bearing performance.

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Thermal Dynamic Exploration of Full-Ceramic Ball Bearings under the Self-Lubrication Condition

Cited by 16 publications

References 23 publications

Research on the Roundness Approximation Search Algorithm of Si3N4 Ceramic Balls Based on Least Square and EMD Methods

Research on the Roundness Approximation Search Algorithm of Si3N4 Ceramic Balls Based on Least Square and EMD Methods

Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition

Thermodynamic analysis of hybrid ceramic bearings with metal inner rings

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