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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卧式罐装电机反应堆冷却剂泵（HRCP）设计尝试使用陶瓷水润滑球轴承。为了证明陶瓷水润滑轴承的适用性和安全性，有必要对其在工作条件下的动态特性进行深入研究。为了提高转子的运行稳定性，确保轴承在水中稳定运行，我们采用混合陶瓷球轴承来支撑转子。然而，HRCP 中的高温环境会影响轴承的动态特性和支撑特性，从而影响转子的安全性。因此，有必要研究混合陶瓷轴承在高温条件下的动态特性。基于 HRCP 的温度场分析，本文建立了混合陶瓷深沟球轴承的载荷平衡方程，并将热膨胀的影响纳入其中。利用该分析模型系统地研究了钢球轴承和陶瓷球轴承在不同温度、速度和载荷下的接触角和动态特性。结果表明，陶瓷球轴承的刚度高于钢球轴承。此外，随着温度和速度的升高，轴承的刚度会降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.