摘要: |
为了提高液体静压导轨系统的动态工作性能,针对其中的气囊式液压蓄能器开展了基础理论研究,通过合理假设和公式推导得到了以气腔体积为输出的蓄能器数学模型,并基于此建立了蓄能器的仿真分析模型,考察了蓄能器在不同的充气压力下对液压回路中的阶跃冲击和脉动冲击的衰减效果,并通过压力衰减实验考察了蓄能器对供油管路中的油液波动的衰减规律。实验结果与仿真结果基本吻合,表明了所建立的气囊式液压蓄能器模型的有效性和实用性。 |
关键词: 蓄能器;数学模型;液压系统;传递函数 |
基金项目: |
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Mathematical Model and Simulation Analysis of Hydraulic Bladder Accumulator |
Bi Chao1, Chen Zhengmao2, Zhang Libin1, Luo Songbao1
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1.Key Laboratory of Science and Technology on Precision Manufacturing Technology;2. Beijing Information and High Technology Research Institute
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Abstract: |
In order to improve the dynamic performance of the hydrostatic guideway system, the basic theory of hydraulic bladder accumulator in it is studied in the paper. Firstly, the mathematic model of the accumulator is established through reasonable assumption and formula derivation, whose output is the volume of the cavity. And then, the simulation analysis model of the accumulator is set up based on the mathematic model, in which the performance of the accumulator in decreasing the pulsatile impact and absorbing the pressure impact is inspected. Finally, the law of attenuating the fluctuation of the hydraulic oil in the pipelines is inspected by experiment, in which the experiment results shown good agreement with the simulation ones. Therefore, the mathematic model of the hydraulic bladder accumulator built up in the paper is effective and practical. |
Key words: accumulator;mathematical model;hydraulic system;transfer function |