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.

中文翻译：

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推力滑动轴承启动和停机状态下的性能研究

摘要-

本文介绍了模拟大型电厂主循环泵（MCP）推力轴承运行的实验台。冷却液在高压（高达 150 × 10 ⁵ Pa）和高达 300°C 的温度下以高速 (5–10 m/s) 在其中移动。这就需要提高该装置的可靠性。该台架适用于在油润滑和水润滑轴承时进行测试。由于通过引入新的减摩材料和设计解决方案对轴承进行了全面改进，用水替代矿物油成为可能。该工作台还配备了测量系统，用于记录圆盘旋转的阻力矩、圆盘的转速、圆盘的角速度以及推力轴承工作表面附近的温度场。启动-停止操作机制是通过特殊的软件功能进行编程的。研究结果表明，当推力轴承在充满水的体积中运行时，在试验台上模拟主停止阶段无法对主推力轴承的性能进行全面评估，因为在运行条件下轴承的部分排水可能会扰乱润滑过程，导致润滑不足、散热急剧恶化和损坏。这些现象必须在真实物体上仔细研究。