某液压锥阀内泄漏流场和空化噪声分析
Analysis of internal leakage flow field and cavitation noise in a hydraulic poppet valve
王华伟 1左思蒙 1何利勇 2张祖提 3吴耀中 1王博 1胡溧1
作者信息
- 1. 武汉科技大学 汽车与交通工程学院,武汉 430070
- 2. 中国船舶集团有限公司第七一九研究所,武汉 430064
- 3. 武汉大学 动力与机械学院,武汉 430072
- 折叠
摘要
液压锥阀内泄漏检测困难,且内泄漏时阀内流体的压力和速度梯度会剧烈变化而诱发严重的空化现象,引起空化噪声,因此,探究液压锥阀内泄漏诱发的噪声特性对锥阀内泄漏声学检测与评估具有重要意义.基于Realiza-ble k-ε湍流模型、Schnerr-Sauer空化模型和宽频噪声模型,建立锥阀内泄漏的数值分析模型,分析不同泄漏间隙和不同压力工况下锥阀内流场的空化及其诱导噪声,探究泄漏间隙、压力工况对空化噪声的影响规律.研究结果表明:在相同泄漏间隙下,随着入口压力的增加,空化区域逐渐扩大,内泄漏声场的最大声功率级随之增大,声场的高噪声区域逐渐向阀尾部移动;在同一入口压力下,随着泄漏间隙的增大,空化的区域逐渐变小,内泄漏声场的最大声功率级先增大后减小;当泄漏间隙达到0.4 mm时,随着入口压力的增大,阀尾出现游离型空化现象.研究结果揭示了锥阀在不同工况下内泄漏时空化噪声的演变趋势,可为液压锥阀的泄漏检测提供参考.
Abstract
The detection of internal leakage in hydraulic poppet valves poses significant challenges.When there is a leakage in the hydraulic poppet valve,the pressure and velocity gradient of the fluid in the valve will change drastically,causing severe cavitation and cavitation noise.The characteristics of the noise are seen as a crucial metric for assessing internal leakage in poppet valves.Studying the noise characteristics is of great significance to the acoustic detection and evaluation of internal leakage of poppet valves.Through building a numerical analysis model for internal leakage in poppet valves,we adopt the Realizable k-ε turbulence model,the Schnerr-Sauer cavitation model,and the broadband noise model to analyze the cavitation and induced noise of the flow field in the poppet valve under different leakage gaps and different pressure conditions and explore the influence of the leakage gap and pressure conditions on cavitation noise.Our results show a high-speed jet is formed at the valve port leakage.As the inlet pressure increases,the cavitation area gradually expands,and the maximum sound power level of the internal leakage sound field rises accordingly under the same leakage gap.The high noisy area of the sound field gradually moves towards the tail of the valve.Under the same inlet pressure,as the leakage gap grows,the cavitation area gradually becomes smaller and the maximum sound power level of the internal leakage sound field first increases and then decreases.When the leakage gap reaches 0.4mm,as the inlet pressure goes up,free cavitation occurs at the valve tail.Our results reveal the changing trend of cavitation noise during internal leakage in poppet valves under different operation conditions,providing theoretical support for leakage detection in hydraulic poppet valves.
关键词
液压锥阀/空化/噪声/泄漏/数值模拟Key words
poppet valve/cavitation/noise/leakage/numerical simulation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据