Study on transient performance of tilting-pad thrust bearings in nuclear pump considering fluid-structure interaction

Li, Qiang; Li, Bin; Li, Xiuwei; Xie, Quntao; Liu, Qinglei; Xu, Xeiwei

doi:10.1016/j.net.2023.03.007

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…In order to simulate the interaction between fluid and solid, it is essential to select a suitable data transfer method for the coupling interface and coupling solution mode [8]. In recent years, research regarding RCP fluid-solid coupling has been as follows: To investigate the lubrication performance of tilting-pad thrust bearings during the startup process of nuclear pumps, Li et al [9] developed a fluid dynamic lubrication model for tilting pad thrust bearings based on CFD method and fluid-solid coupling. Weng et al [10] simulated the connection between the emergency cooling system of the new reactor CAP1400 and the pressure tank using the thermo-fluidsolid coupling method.…”

Section: Introductionmentioning

confidence: 99%

Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

An,

Zhong,

et al. 2024

FDMP

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The reactor coolant pump (RCP) rotor seizure accident is defined as a short-time seizure of the RCP rotor. This event typically leads to an abrupt flow decrease in the corresponding loop and an ensuing reactor and turbine trip. The significant reduction of core coolant flow while the reactor is being operated at full load can have very negative consequences. This potentially dangerous event is typically characterized by a complex transient behavior in terms of flow conditions and energy transformation, which need to be analyzed and understood. This study constructed transient flow and rotational speed mathematical models under various degrees of rotor seizure using the test data collected from a dedicated transient rotor seizure test system. Then, bidirectional fluid-solid coupling simulations were conducted to investigate the flow evolution mechanism. It is found that the influence of the impeller structure size and transient braking acceleration on the unsteady head (H u ) is dominant in rotor seizure accident events. Moreover, the present results also show that the rotational acceleration additional head (H u1 ) is much higher than the instantaneous head (H u2 ).

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Section: Introductionmentioning

confidence: 99%

Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

An,

Zhong,

et al. 2024

FDMP

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“…Static and dynamic pressure thrust bearings offer numerous advantages, including robust axial loading capacity, high operational accuracy, exceptional vibration absorption performance and easy maintenance (Yu et al, 2017;Li et al, 2023a). Consequently, they are extensively used in various fields, including the automotive industry, precision machine tools and ocean engineering (Li et al, 2023b;Lu and Tian, 2023;Ueda et al, 2014). However, the operation of thrust bearings at high speeds and heavy loads can face some challenges.…”

Section: Introductionmentioning

confidence: 99%

“…, 2023a). Consequently, they are extensively used in various fields, including the automotive industry, precision machine tools and ocean engineering (Li et al. , 2023b; Lu and Tian, 2023; Ueda et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of differently shaped textures on the tribological properties of static and dynamic pressure thrust bearings and multiobjective optimization

Yu,

Shi,

Gao

et al. 2024

ILT

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Purpose The purpose of this study is to evaluate three types of textures designed to enhance the tribological performance of static and dynamic pressure thrust bearings. Design/methodology/approach To explore the effects of different types of textures on tribological performance, the Reynolds equation is modified using lubrication theory and computational fluid dynamics methods while considering the influence of cavitation and turbulence on the physical field. In addition, the tribological performance is optimized through an improved selection algorithm based on Pareto envelope (PESA). Findings The results indicate that textured thrust bearings exhibit superior tribological performance compared to untextured ones. The circular texture outperforms other textures in terms of load-bearing and friction performance, with improvements of approximately 28.8% and 18.9%, respectively. In addition, the triangular texture exhibits the most significant temperature improvement, with a reduction of approximately 1.93%. Originality/value The study proposes three types of textures and evaluates the friction performance of thrust bearings by modifying the Reynolds equation. In addition, the optimal texture design is determined using an improved selection algorithm based on PESA.

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“…Silva et al 4 proposed a tilting-pad journal bearing controlled by an electromagnetic brake. Li et al 5 established the hydrodynamic lubrication model of tilting pad thrust bearing, and studied the lubrication characteristics of tilting pad thrust bearing during start-up. Badawi et al 6 studied the influence of the tilting pads number and the pads gap on the performance of tilting pad journal bearings, the results show that with the decrease of the pad gap, the bearing capacity increase.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of tilting pad thrust bearing incorporating the surface roughness, texture and turbulence effect

Wang,

Zou,

Duan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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In order to improve the lubrication performance of the friction pair, the effect of composite micro-texture on the lubrication performance of the tilting pad thrust bearing is studied. Based on the structural model of tilting pad thrust bearing considering composite micro-texture, the lubrication characteristics of thrust bearing with composite micro-texture parameters and tilting pad parameters are analyzed. At the same time, the theoretical model of tilting pad composite micro-texture bearing considering roughness and turbulence effect is established, and the performance of thrust bearing considering roughness and turbulence effect is studied. The results show that the performance of composite micro-textured bearings is better than that of single micro-textured bearings, the performance of tilting pad bearings is better than that of parallel pad bearings, and the performance of circular composite fish-shaped micro-textured tilting pad bearings is the best. The optimal bearing fulcrum position is near the inner diameter, and the optimal fulcrum circumferential inclination angle is about 27.5°. Considering the roughness and turbulence effect, the maximum pressure and bearing capacity of the bearing improves, and the friction coefficient significantly reduces.

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Study on transient performance of tilting-pad thrust bearings in nuclear pump considering fluid-structure interaction

Cited by 5 publications

References 25 publications

Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

Effects of differently shaped textures on the tribological properties of static and dynamic pressure thrust bearings and multiobjective optimization

Performance analysis of tilting pad thrust bearing incorporating the surface roughness, texture and turbulence effect

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