Reduction of the flow forces in a small hydraulic seat valve as alternative approach to improve the valve characteristics
Reduction of the flow forces in a small hydraulic seat valve as alternative approach to improve the valve characteristics
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DOI：
10.1016/j.enconman.2014.10.037
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发表时间：
2015-01-01
影响因子：
10.4
通讯作者：
Herakovic, Niko
中科院分区：
文献类型：
--
作者：
Simic, Marko;Herakovic, Niko
在本文中，阀芯和壳体的几何形状在一个小型液压座阀，使轴向流力减少到最小值的优化进行了说明。未优化的液压阀几何形状通常是与响应时间、驱动力和能量消耗相关的许多问题的主要原因。为了克服这些局限性和问题，我们已经做了一个彻底的数值和实验分析的座阀。确定了影响阀座阀性能的主要几何参数，并进行了数值分析.在接下来的步骤中，数值模拟的基本理论，包括三维建模，网格划分和参数化，说明。利用商用模拟工具Ansys CFX对小型液压座阀中的液动力的减小进行了详细的研究。阀的数值流体模型的验证是通过比较模拟和实验结果与轴向流动力测量试验台。利用经过验证的阀的数值流体模型，考虑阀的所有影响几何参数，建立新的流体模型，以最终优化阀的几何形状。仿真分析的结果表明，只要改变阀芯和阀壳的几何形状，就可以显著减小流体力的轴向分量。因此，阀的动态特性，如响应时间，被显著地改善，同时所需的致动力和功率消耗被减小。(C)2014作者爱思唯尔有限公司出版
In this paper the optimization of the spool and housing geometry in a small hydraulic seat valve to enable the reduction of the axial flow forces to a minimum value is described. Non-optimized hydraulic valve geometry is usually the main cause for many problems related to response time, actuation force and energy consumption. To overcome these limitations and problems we have done a thorough numerical and experimental analysis of a seat valve. The main influential geometry parameters of the seat valve are defined for numerical analyses. In the next step the basic theory of the numerical simulation, including the 3D modelling, meshing and parameterization, is explained. The reduction of the flow forces in a small hydraulic seat valve is treated in detail by using a commercial simulation tool, Ansys CFX. The validation of the numerical fluid model of the valve is done by comparing simulation and experimental results obtained with the test rig for axial flow force measurement. With the validated numerical fluid model of the valve new fluid models are built taking into account all influential geometry parameters of the valve for the purpose of the final optimization of the valve geometry. The results of the simulation analyses show that the axial component of the flow forces can be reduced significantly just by modifying the geometry of the valve spool and housing. Thus the valve dynamic characteristics, such as response time, are significantly improved while the necessary actuation force and power consumption are reduced. (C) 2014 The Authors. Published by Elsevier Ltd.