Abstract

Control valves are actuating elements of a steam turbine control system; the quality of their performance directly affects the reliability of the overall steam turbine unit. Accordingly, these valves must meet very stringent requirements. Among the factors and characteristics responsible for the quality of control valves, an important place is occupied by the design simplicity, manufacturability, serviceability, ease of installation, high operating reliability, low hydraulic resistance, low dynamic loads acting on the valve stem, and moderate noise level. At the same time, it should be noted that there is quite a large fleet of old, obsolete steam turbine power units at present in Russia with valves featuring both high hydraulic resistance and poor reliability. In new, linear control valves developed in the last decade, almost all design possibilities for their improvement have been exhausted. Hence, rotary control valves may be of great interest for practice. It is this type of valve that is considered below. This information includes a description of valve design, results from the investigation of flow parameters in the valve flow path, and the flow characteristic obtained by a mathematical simulation technique. This valve meets the above-mentioned requirements to the maximum extent, is fully balanced of axial thrust, has almost zero steam leakage along the drive stem, and is operated with low-power actuators with any bores and any initial steam pressures.

中文翻译：

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新型动力汽轮机旋转阀的研制与研究

摘要

控制阀是蒸汽轮机控制系统的致动元件。它们的性能质量直接影响整个蒸汽轮机单元的可靠性。因此，这些阀必须满足非常严格的要求。在影响控制阀质量的因素和特性中，简单性，可制造性，可维修性，安装简便性，高操作可靠性，低水力阻力，作用在阀杆上的低动态载荷以及适度的设计占据着重要位置。噪音水平。同时，应该指出的是，俄罗斯目前有相当数量的旧的，陈旧的蒸汽轮机动力装置，其阀门具有很高的耐液压性和可靠性。在过去十年中开发的新型线性控制阀中，几乎所有用于改进的设计可能性都已用尽。因此，旋转控制阀对于实践可能是非常感兴趣的。下面考虑的是这种类型的阀。该信息包括对阀门设计的描述，对阀门流路中流动参数的研究结果以及通过数学模拟技术获得的流动特性。该阀最大程度地满足上述要求，完全平衡了轴向推力，沿驱动杆的蒸汽泄漏几乎为零，并通过具有任何孔和任何初始蒸汽压力的低功率执行器进行操作。该信息包括对阀门设计的描述，对阀门流路中流动参数的研究结果以及通过数学模拟技术获得的流动特性。该阀最大程度地满足上述要求，完全平衡了轴向推力，沿驱动杆的蒸汽泄漏几乎为零，并通过具有任何孔和任何初始蒸汽压力的低功率执行器进行操作。该信息包括对阀门设计的描述，对阀门流路中流动参数的研究结果以及通过数学模拟技术获得的流动特性。该阀最大程度地满足上述要求，完全平衡了轴向推力，沿驱动杆的蒸汽泄漏几乎为零，并通过具有任何孔和任何初始蒸汽压力的低功率执行器进行操作。