液压变压器瞬时流量特性分析  

ANALYSIS OF INSTANTANEOUS FLOW RATE CHARACTER OF HYDRAULIC TRANSFORMER

作　　者：徐兵[1] 马吉恩[1] 杨华勇[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《机械工程学报》2007年第11期44-49,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50305032)。

摘　　要：为了深入了解液压变压器高噪声产生的内在原因,对液压变压器的瞬时流量特性进行理论推导和仿真研究。通过理论推导建立液压变压器在不同配流盘控制角度和不同工作状态时瞬时流量的数学模型,并对其进行仿真分析。总结各槽口在不同工况下瞬时流量的变化规律,进而优化模型,并得到各槽口在不同工作状态时的瞬时流量脉动率。提出流量脉动率高是造成液压变压器高噪声的主要原因,在液压变压器试验研究中也得到液压变压器噪声要高于同基体结构相同转速下柱塞泵、马达的噪声的结论。研究结果揭示了液压变压器高噪声的主要原因,并为改善液压变压器的性能提供重要的理论依据。To study the high noise reason of hydraulic transformer in-depth, instantaneous flow rate characters are studied both in theory and through simulation analysis. Mathematic models are obtained by theoretical analysis considering different working situations and valve plate control angles. The instantaneous flow variation rules for each port in valve plate at varying working conditions are concluded by simulation analysis using the mathematic models. And these mathematic models are also optimized through the upper conclusions. Pulsation coefficient at every port is evaluated at different working situations. The results indicate that high pulsation coefficient is one of the main causes that bring about high noise. Experiment results also show that noise of the hydraulic transformer is much higher than the similar structured piston pump or motor. Analyzing results provide a high noise reason, which would be an important theoretical reference for further improving the hydraulic transformer.

关 键 词：液压变压器 瞬时流量 流量特性 噪声 

分 类 号：TH137.5[机械工程—机械制造及自动化]