Theoretical and Experimental Investigation on Thermal Characteristics of Railway Double-Row Tapered Roller Bearing

Gao, Pengfei; Tang, Wuchu; Cui, Yunxian; Wang, Yuchen; Mo, Guowei; Yin, Jiuli

doi:10.3390/en15124217

Cited by 8 publications

(4 citation statements)

References 27 publications

(32 reference statements)

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“…Gao et al [11] investigated the temperature distribution of bearing component at different rotational speeds, where the inner ring was most affected by the speed. To anticipate the dynamic characteristics of rotor system, Liu H et al [12] advanced a coupling model that considered the bearing thermal effect. It is found that the stiffness of bearing decreases after considering thermal effect, and vibration characteristics of rotor systems become more complex in comparison to the system without considering the thermal effect.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of ceramic bearing rotor system considering temperature variation fit clearance

Zhang,

Gao,

Wang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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Under high speed and high precision operation, the ceramic bearing rotor system will generate high temperature rise. Ceramic bearings and steel bearing pedestal will produce different thermal deformation due to material differences, which will lead to the non-uniform change of fit clearance. Based on the bearing heat generation and deformation mechanism, the clearance fit model of ceramic bearing rotor system is established, the contact relationship between bearing outer ring and pedestal is analyzed, and the nonlinear dynamic model of ceramic bearing rotor system considering temperature variation clearance fit is established. The nonlinear vibration characteristics of bearing rotor system under the influence of temperature variation fit clearance are investigated, and the system stability is analyzed by using phase plane diagram and bifurcation diagram. Finally, the model is verified with vibration experiments. The results show that the thermal deformation difference between the outer ring and the pedestal increases with the increase of internal temperature. The existence of temperature-varying clearance makes the amplitude of the rotor system fluctuate locally, and the vibration changes from periodic vibration to quasi-periodic motion and lengthens the chaotic period. The stability of the rotor system can be better maintained by properly reducing the bearing fit clearance at high speed. The research results lay a theoretical foundation for the further optimization design of ceramic bearing rotor system.

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Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of ceramic bearing rotor system considering temperature variation fit clearance

Zhang,

Gao,

Wang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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“…Taking into account the complex geometry pairings and kinematics, the tribological behavior of the roller end/face rib contact of tapered roller bearings was predicted by EHL contact simulations, and it is mainly determined by the basic geometric pairing and the radii (Wirsching et al, 2021). Through finite element analysis, the temperature distribution of railway double-row tapered roller bearings under test conditions was investigated (Gao et al, 2022). A computational fluid dynamics (CFD) model was developed to consider effects of aeration on the lubricant behavior in tapered roller bearings (Maccioni et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model

Liu

Long

et al. 2023

Front. Manuf. Technol.

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The roller end/rib contact of tapered roller bearings significantly affects lubricating condition and power loss. To improve the lubrication performance of the inner ring rib and the large end of the roller in tapered roller bearings used in railway coaches, based on the structural analysis of the inner rib and the large end of the roller and considering spin–slide effects between the rib and the large end of the roller, a thermal elastohydrodynamic lubrication model with a Carreau rheological model was established in a tapered roller bearing. Two kinds of rib structures were provided: the tapered rib and spherical rib. Under different conditions, variations in the friction coefficient versus the ratio of curvature radius of the large end of the roller to that of the rib were compared, and the film thickness and film temperature varied with the rotational speed and the effect of load was compared between the two rib structures. Results showed that spinning motion has little effect on the lubrication at the contact point between the inner ring rib and the large end of the tapered roller. There exists an optimal ratio of the curvature radius between the large end of the roller and the spherical or tapered rib; moreover, the friction coefficient corresponding to this optimal ratio value is the smallest. With the increase in the inner ring speed, both film thickness and temperature increase for the two rib structures. Different from the spherical rib, the difference between the minimum and the central film thickness is almost unchangeable, and the tapered rib shows a slight temperature rise. As the load increases, the difference between the minimum and the central film thickness becomes larger, and the temperature in the contact zone gradually increases for the two ribs. Different from the tapered rib, the lower frictional coefficient and lower minimum film thickness are generated for the spherical rib because of higher film temperature.

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“…For the roller-end/flange contact [22][23][24][25][26], a spin motion would assist the inlet replenishment process by periodically bringing the oil left from the race side bands or the roller surface. Therefore, further research on spinning combined with the oil-starvation problem needs to be carried out in sliding EHL and the influence of the oil supply condition with slightly higher oil viscosity.…”

Section: Introductionmentioning

confidence: 99%

Effects of Oil Supply Condition on Spinning–Sliding EHL

Li,

Liu,

Meng

et al. 2023

Lubricants

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An optical interference test rig with spinning elastohydrodynamic lubrication (EHL) was established to investigate the spinning lubrication performance under different oil-supply conditions. Variations in the shape and thickness of the film versus the velocity, the load, and the spinning factor under fully flooded lubrication were discussed, and the effects of the inlet-starvation position and oil-supply quantity were analyzed. The results show that the symmetry for the classical horseshoe shape does not exist under both spinning–rolling and spinning–sliding EHL conditions. Different from spinning–rolling, a dimple is generated more easily under the spinning–sliding condition. The dimple is related to the load and the speed. The effects of the inlet-starvation position on spinning EHL are different. When the inlet starvation is on the low-speed side of the contact, that is, proximal to the center of rotation, the inlet-starvation position extends from the proximal side to the center of rotation to the distal side to the center of rotation, i.e., the high-speed side of the contact, which is starved easily. When the starvation happens on the high-speed side, i.e., distal to the center of rotation, the starvation at this position becomes much more severe, and lubrication failure and a risk of wear will occur. In addition, the effects of oil-supply quantity on spinning EHL are important.

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Theoretical and Experimental Investigation on Thermal Characteristics of Railway Double-Row Tapered Roller Bearing

Cited by 8 publications

References 27 publications

Nonlinear dynamic analysis of ceramic bearing rotor system considering temperature variation fit clearance

Nonlinear dynamic analysis of ceramic bearing rotor system considering temperature variation fit clearance

Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model

Effects of Oil Supply Condition on Spinning–Sliding EHL

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