摘要
当调节阀在大流量和高压差的工况下运行时,节流区域很容易产生空化现象,引起阀体的异常振动及噪声,甚至损害阀体。以DN200的活塞式调流调压阀为研究对象,基于西门子LMS数据采集系统测量了调流阀在不同开度及空化数下的水下噪声信号,并计算了水下空化噪声的均方根值(RMS),绘制了不同开度下的空化数-噪声曲线,得到了不同开度下的初生空化数及持续空化数,部分开度还得到了阻塞空化数。结果表明,调流阀小开度下抗空化性能更好,随阀门开度增加,初生空化数和持续空化数先快速增加,至70%开度以后缓慢增加,呈抛物线增长规律。研究结果对活塞式调流调压阀的特征空化系数曲线的确定、空化状态监测、降噪减振优化设计以及阀门的安全稳定运行具有一定指导意义。
When the regulating valve operates under high flow rates and high pressure differentials,cavitation phenomena are prone to occur in the throttling area,resulting in abnormal vibration and noise in the valve body,and even damage to the valve body.Taking the DN200 flow-pressure-regulating plunger valve as the research object,based on the Siemens LMS data acquisition system,the underwater noise sig‐nal of the regulator valve is measured at different openings and cavitation numbers,and the root-mean-square(RMS)value of the underwa‐ter cavitation noise is calculated.The cavitation number-noise curves at different openings are plotted,obtaining the initial cavitation num‐ber,sustained cavitation number,and some openings also determine the obstructed cavitation number.The results indicate that the flow con‐trol valve exhibits better resistance to cavitation at smaller openings.As the valve opening increases,both the initial cavitation number and sustained cavitation number increase rapidly initially but then increase slowly after 70%opening,following a parabolic growth pattern.The results of the study provide certain guidance for determining the characteristic cavitation coefficient curve,monitoring cavitation status,opti‐mizing vibration reduction and noise control design,and ensuring the safe operation of flow-pressure-regulating plunger valves.
作者
闫黎黎
童保林
李玲玲
赵亮
常正柏
麦楚霖
蒋劲
YAN Li-li;TONG Bao-lin;LI Ling-ling;ZHAO Liang;CHANG Zheng-bai;MAI Chu-lin;JIANG Jin(Yunnan Institute of Water&Hydropower Engineering Investigation,Design and Research,Kunming 650021,Yunnan Province,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2024年第12期130-136,141,共8页
China Rural Water and Hydropower
基金
国家十四五重点研发计划(2021YFC3000205-06)
云南省高层次人才及创新团队(2018HC024)。
关键词
活塞式调流调压阀
空化
水下噪声
Flow-pressure-regulating plunger valve
cavitation
underwater noise
