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目的:研究在声空化条件下，用含有空气和蒸汽的ISO4113试验油作为传动液，其压力传递特性及影响因素。方法:建立传动液在声空化条件下的压力传递数学模型，分析管内传动液压力的频率响应特性和传递函数；同时，结合流场参数的动态变化，分析沿管道轴向方向的动态响应特性，探讨管径、含气率和温度对管内传动液压力传递特性的影响。结果:当管内传动液与凸轮轴的激励产生谐振时，谐振频率为60 Hz时的幅值比最高可达55 dB。在200～1 000 Hz频率范围内，幅值比稳定在1～3 dB之间，液体传动系统响应保持稳定。尤其是频率在400～800 Hz范围内，系统逐渐达到一种相对稳定的动态平衡状态，仅有微小的相位差波动。在其他参数保持不变的条件下，幅值比随管径、初始含气率和初始温度减小而增大，而相位差几乎不变。结论:通过适当减小管径、降低初始含气率和控制初始温度等措施，可有效提高传动液压力传递效率。
Abstract：Aims: This paper aims to investigate the pressure transfer characteristics and influencing factors of ISO4113 test oil containing air and steam as a transmission fluid under acoustic cavitation conditions. Methods: The mathematical model of pressure transfer in a liquid transmission tube under acoustic cavitation was established; and the frequency response characteristic and the transfer function of hydraulic pressure in pipelines were obtained. Furthermore, not only the dynamic response characteristics along the axial direction of pipelines, but also the influence of pipeline diameter, the void fraction and temperature on the pressure transfer of liquid transmission pipelines were analyzed, in combined with the dynamic variation of flow field parameters. Results: The transmission fluid in the tube resonated with the camshaft excitation; and the amplitude ratio could reach up to 55 dB at a resonance frequency of 60 Hz. Within the frequency range of 200～1 000 Hz, the amplitude ratio stabilized in the range of 1～3 dB; and the response of the fluid transmission system remained stable. Especially in 400～800 Hz, the system gradually reached a relatively stable dynamic equilibrium state, with only minor phase fluctuations. When other parameters were fixed, a decrease in the diameter, void fraction, and temperature will enhance the amplitude ratio with minimal impact on phase difference. Conclusions: The pressure transfer efficiency can be improved by reducing the pipeline diameter and its initial void fraction, thus controlling the initial temperature.
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基本信息:
DOI：
中图分类号:TH137
引用信息:
[1]王勇金,陈俊君,陈益宏等.声空化条件下传动液压力传递特性[J].中国计量大学学报,2025,36(01):26-34.
基金信息:
浙江省自然科学基金项目(No.LY14E050023); 浙江省基础公益研究计划项目(No.LGG21E050005); 浙江省科技计划重点项目(No.2019C01128,2023C01163)