摘要
为了消除液压阀中的噪声,对不同节流槽内部压力分布、气穴形态和噪声频谱进行了研究.在对节流槽结构特征及流动模型进行分析的基础上,预测了节流阀内气穴噪声的声压模型.通过高速观测及噪声频谱分析对模型进行了验证,并估计了节流阀内的气泡尺寸.结果表明,节流槽结构特征对阀内压力分布、气穴与噪声特性有直接的影响,U形槽内部压力超调量明显高于V形槽,可以显著抑制气穴的析出与生长.不同类型节流槽通过压力分布决定了气泡的成长过程,与U形槽相比,V形槽内部气泡尺寸较大,气泡尺度大小是影响节流槽气穴噪声的主要因素.
To eliminate hydraulic valves noise pressure distributions, cavitation and noise spectrum inside different throttling grooves were studied. The structure characteristics and flow-model of throttling groovewere analyzed, and the sound-pressure model of cavitation noise inside throttling valves was predicted. The model was verified with high-speed observation and noise-measurement spectrum analysis, and the bubble size inside the throttling valve was calculated. The results show that the structural characteristicsof throttling grooves have direct influences on pr Pressure overshoot inside U-notch is much highe opment of cavitation. The growth of cavitation i throttling grooves. Bubble size inside V-notch is the major factor affecting cavitation noise in the essure distribution, r than V-notch, and s determined by the bigger than that of throttling grooves. cavitation and noise inside can restraint pressure dist U-notch, and the inception ribution insid the valve. and devele different the bubble dimension is the major factor affecting cavitation noise in the throttling grooves.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第3期456-460,465,共6页
Journal of Zhejiang University：Engineering Science
基金
国家"973"重点基础研究发展规划资助项目(2006CB705405)
国家自然科学基金资助项目(50575200)
关键词
节流槽
压力分布
气穴
噪声
throttling groove
pressure distributions
cavitation
noise
作者简介
杜学文（1978-），男，河北衡水人，博士生，从事流体振动及流动噪声控制方面的研究，E-mail：xwdu@zju.edu.cn
通讯联系人：邹俊，男，博士，讲师．E-mail．iunzou@zju．edu.cn
