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全液压转向器的流场分析及其特性研究
Flow Field Analysis and Characteristic Research for Rotary Valve of Hydraulic Steering Control Units
【作者】 石银;
【导师】 王存堂;
【作者基本信息】 江苏大学 , 机械电子工程, 2007, 硕士
【摘要】 全液压转向器是工程机械领域十分重要的液压元件,在现场使用过程中出现了噪声大,能量损失严重以及气蚀现象明显等问题。为此,本文通过对全液压转向器转阀内部流场的数值模拟和可视化研究,提出了低能耗、低噪声的设计方案。首先,本文提出了全液压转向器转阀流道的建模假设,在此基础上根据流体力学的基本理论,建立了流道流动的数学模型以及CFD数值模拟模型,为分析不同结构流道的过流特性奠定了理论基础。其次,对常规结构进行数值模拟,得出了流场的压力分布、速度分布和能量分布,并据此定性地分析了流场结构,如速度分布、压力分布、旋涡的产生与消失等与能量损失和噪声的关系。再次,针对常规结构过流特性的不足,在相同计算条件下,对改进后的模型进行流场分析,对比了两种不同方案的数值模拟结果,指出了通过改进流道结构降低转向器能量损失和噪声的可行性;并探索了水力直径对流动特性的影响。最后,在此基础上,本文提出了降低能量损失,减小噪声的最佳改进方案。本文的工作为开发出新一代高效率、低能耗、低噪声的全液压转向器提供了理论依据。
【Abstract】 Hydraulic steering control units (HSCU) is a kind of very important hydraulic unit in the field of engineering mechanism. In order to disappear loud noise , serious energy loss at locale, the paper offers blue print with low energy loss and low noise.At first, it brought forward the supposition of the model and then established the model with the help of hydrodynamics conclusions. It settles the foundation for analyzing the valve.Secondly, the flow field is computed and the velocity distribution, pressure distribution and energy distribution can be obtained and relations between the valve channel and the energy loss, the negative pressure distribution can be analyzed.Again, at the same condition, the reformative model is computed and the result could be compared. Also the effect of the size is analyzed.At last, the analyses can offer the theory foundation for structure optimizing. This paper offers the theory foundation for designing valves with the high efficiency, low energy loss and low noise.
【Key words】 HSCU; CFD Model; Flow Field Analysis; Structure Optimizing;
- 【网络出版投稿人】 江苏大学 【网络出版年期】2007年 05期
- 【分类号】TH137.5
- 【被引频次】14
- 【下载频次】522