Study of the Performance of a Thrust Sliding Bearing in Startup and Rundown Regimes

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
I. S. Yavelov, A. V. Rochagov, A. V. Zholobov
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Abstract

This article describes the experimental bench simulating the operation of thrust bearings of the main circulation pump (MCP) of powerful power plants. The coolant moves in them at high speeds (5–10 m/s), at high pressure (up to 150 × 105 Pa) and temperatures up to 300°C. This entails the requirements for increased reliability of this unit. The bench was adapted for testing both when the bearing is lubricated with oil and when lubricated with water. The substitution of mineral oils with water became possible thanks to a comprehensive improvement of the bearing through the introduction of new antifriction materials and design solutions. The bench was also equipped with measuring systems for recording the moment of resistance to the rotation of the disk, the rotational speed of the disk, the angular velocity of the disk, and the temperature field near the working surfaces of the thrust bearings. The startup–rundown operating regime was programmed with a special software function. As a result of the studies, it was shown that simulating the main rundown stage on a test bench when a thrust bearing is operating in a water-filled volume cannot provide a comprehensive assessment of the performance of the main thrust bearing, since under operating conditions the lubrication process may be disrupted due to partial drainage of the bearing, leading to lubrication starvation, a sharp deterioration in heat dissipation, and damage. These phenomena must be carefully studied on real objects.

Abstract Image

Abstract Image

推力滑动轴承在启动和停机状态下的性能研究
摘要--本文介绍了模拟火力发电厂主循环泵(MCP)推力轴承运行的实验台。冷却剂在其中以高速(5-10 m/s)、高压(高达 150 × 105 Pa)和高达 300°C 的温度运动。这就要求提高设备的可靠性。试验台既适用于油润滑轴承,也适用于水润滑轴承。由于采用了新的减摩材料和设计方案,轴承得到了全面的改进,因此可以用水代替矿物油。工作台还配备了测量系统,用于记录圆盘旋转阻力矩、圆盘转速、圆盘角速度以及推力轴承工作面附近的温度场。启动-停机运行机制由一个特殊的软件功能进行编程。研究结果表明,在试验台上模拟推力轴承在充满水的环境中工作时的主破损阶段并不能全面评估主推力轴承的性能,因为在工作条件下,润滑过程可能会由于轴承的部分排水而中断,导致润滑不足、散热急剧恶化和损坏。这些现象必须在实物上进行仔细研究。
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
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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