新型工程机械液压平衡阀性能仿真与实验分析

发布时间：2018-05-05 18:02

本文选题：液压平衡回路 + 新型平衡阀　；参考：《广西科技大学》2015年硕士论文

【摘要】：平衡阀是液压平衡回路中至关重要的液压元件,也是在现今工程机械中广泛应用的液压元件。平衡阀其性能的优、劣也直接决定整机的性能。液压平衡阀的功能作用是:该阀具有安全保护、限制速度以及能使液压机械动作平稳。但平衡阀要完成承载下降工况,需要该液压系统为其提供控制压力油,因此,该液压系统存在控制压力较大、工作稳定性和可靠性较差、结构比较复杂,加工难度大等问题。因此,对新型工程机械液压平衡阀进行研究,其意义在于使新型液压平衡阀优于传统的平衡阀。论文针对上述问题,文章采用了理论分析、仿真分析、实验验证相结合的方法,对新型平衡阀进行理论计算、动态特性仿真分析、实验分析验证,以验证新型平衡阀良好的特性,研究工作如下:(1)介绍了新型平衡阀的工作原理及性能特点,对该阀进行了数学建模及其结构和关键零部件的设计计算。(2)通过AMESim仿真软件验证了该阀性能特点的可行性,对液压元件进行动态响应特性分析,对元件不同参数进行研究,同时也对相关液压系统进行整体评估及预测其性能,这为该类型产品的设计、优化提供快速便捷的辅助参考。(3)建立新型平衡阀的挖掘机整机系统的AMESim模型,对该模型进行仿真分析,得到仿真结果进行分析并对该模型进行三维可视化验证。通过结果数据可知含有新型平衡阀的整机系统的性能特点,并为该阀的整机试验提供了参考依据。(4)将新型平衡阀装在液压综合实验台上进行相关实验,对实验结果和仿真结果进行对比分析,实验结果得出的压力—流量特性曲线与仿真压力—流量特性曲线的变化规律基本一致,验证了仿真的正确性与可行性,而且试验结果还表明新型平衡阀具有稳定的动态特性,压损小,防爆工况反应时间短等优点。
[Abstract]:Balance valve is a very important hydraulic component in hydraulic balancing circuit, and it is also widely used in construction machinery. The performance of the balance valve is superior and inferior, which directly determines the performance of the whole machine. The function of hydraulic balance valve is: it has safety protection, limit speed and make hydraulic mechanical movement stable. However, the hydraulic system is needed to supply the control pressure oil to the balance valve in order to complete the load-bearing and descending condition. Therefore, the hydraulic system has some problems, such as large control pressure, poor working stability and reliability, complex structure, and great processing difficulty and so on. Therefore, the research on the new hydraulic balancing valve of construction machinery means that the new hydraulic balance valve is superior to the traditional balance valve. In order to solve the above problems, the paper adopts the methods of theoretical analysis, simulation analysis and experimental verification to calculate the new type of balance valve theoretically, simulate the dynamic characteristics of the valve, and verify the experimental analysis. In order to verify the good characteristics of the new type of balancing valve, the research work is as follows: 1) the working principle and performance characteristics of the new type of balancing valve are introduced. The mathematical modeling, structure and design calculation of the key parts of the valve are carried out. The feasibility of the valve performance is verified by AMESim simulation software. The dynamic response characteristics of the hydraulic components are analyzed, and the different parameters of the components are studied. At the same time, the relative hydraulic system is evaluated and its performance is forecasted, which provides a fast and convenient auxiliary reference for the design and optimization of this type of product. The AMESim model of the excavator system with new balance valve is established. The simulation results of the model are analyzed and the 3D visualization of the model is verified. Through the result data, we can know the performance characteristics of the whole machine system with the new balance valve, and provide the reference basis for the whole machine test of the valve, and install the new balance valve on the hydraulic comprehensive test bench to carry on the related experiment. The experimental results are compared with the simulation results. The pressure flow characteristic curve obtained from the experiment is basically consistent with that of the simulation pressure flow characteristic curve, which verifies the correctness and feasibility of the simulation. The experimental results also show that the new balancing valve has the advantages of stable dynamic characteristics, low pressure loss and short reaction time under explosion-proof conditions.
【学位授予单位】：广西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU603;TH137.52

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