| 摘要:对单体泵控制阀区域在阀打开过程中的特性进行试验研究。在泵体上设计光学透视窗口，采用高速摄像仪器获得阀开启过程中不同开度下控制阀出口端的流场图片；对图片进行处理，量化空化强度，获得空化相对亮度值RB。通过分析压差与RB的关系，发现:相同开度下，随压差的增大，RB增大。与稳定开度结果不同的是，阀打开过程中，虽然压差随开度降低，但空化随开度的增大一直增强，即便在大开度时压差已经很小，依然有较大的空化强度。 |
| 关键词: 控制阀 流场 空化 动态特性 |
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| Research on Dynamic Characteristics of Control Valve Area ofUnit Pump During the Valve Opening Process |
| Wu Zhe,Chen Yongyan |
| College of Energy and Power Engineering, Inner Mongolia University of Technology,Inner Mongolia Hohhot 010051 |
| Abstract:The experimental study on the characteristics of control valve inner area of unit pump during the valve opening process was carried out. Optical perspective window was designed on the pump body, and a high-speed camera recorded the image of the inner valve outlet flow under the conditions of different needle lifts during the opening process of the valve. The images were post processed, and the cavitation intensity was quantified to get the cavitation relative brightness RB. By analyzing the relationship between pressure differential and RB, the conclusion that when the needle lift remains constant, RB increases with the increase in the pressure differential can be drawn. Different from the situation that the needle lift remains constant, during the opening process of the valve, although the pressure differential decreases as the needle lift decreases, the cavitation intensity has been continually enhanced with the increase of the needle lift. Even when the needle lift is large and the pressure differential is very low, there is still great cavitation intensity. |
| Key words: control valve flow field cavitation dynamic characteristic |
