Study on the dynamic characteristics of hybrid ceramic ball bearings in a horizontal canned motor reactor coolant pump

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Annals of Nuclear Energy Pub Date : 2025-03-14 DOI:10.1016/j.anucene.2025.111314

Xiaohang Chen , Danrong Song , Jinqi Lu , Bo Wei , Rui Xu , Dezhong Wang

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Abstract

Horizontal Canned Motor Reactor Coolant Pump(HRCP) design attempts to use ceramic water-lubricated ball bearings. To demonstrate the suitability and safety of ceramic water-lubricated bearings, it is necessary to conduct an in-depth study of the dynamic characteristics under operating conditions. To improve the operational stability of the rotor and ensure that the bearings operate stably in water, we use hybrid ceramic ball bearings to support the rotor. However, the high-temperature environment in HRCP can affect the dynamic and support characteristics of the bearings, thereby impacting the safety of the rotor. Therefore, it is necessary to study the dynamic characteristics of hybrid ceramic bearings under high-temperature conditions. Based on the temperature field analysis of the HRCP, this paper establishes the load balance equations for hybrid ceramic deep groove ball bearings, incorporating the effects of thermal expansion. This analysis model was used to systematically study the contact angles and dynamic characteristics of steel ball bearings and ceramic ball bearings under different temperatures, speeds, and loads. The results indicate that the stiffness of ceramic ball bearings is higher than that of steel ball bearings. Additionally, as the temperature and speed increase, the stiffness of the bearings decreases.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.