旋转式激振阀流热固多场耦合特性研究  

RESEARCH ON MULTI-FIELD COUPLING CHARACTERISTICS OF FLUID, THERMAL AND SOLID IN ROTARY EXCITATION VALVE

作　　者：卢胜东 王思瀚 赵子雁 赵国超[1] 王慧[1] LU ShengDong;WANG SiHan;ZHAO ZiYan;ZHAO GuoChao;WANG Hui(School of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000

出　　处：《机械强度》2023年第1期237-243,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金(52204169)资助。

摘　　要：旋转式激振阀是高频高压电液激振系统的关键元件之一,其动态特性的好坏直接影响整个激振系统的工作性能。为了分析旋转式激振阀流-热-固多场耦合作用下的动态特性,首先基于Fluent仿真,通过滑移网格方法对旋转式激振阀的流场进行动态模拟,并实测旋转式激振阀流量对仿真结果进行验证,然后使用Ansys对旋转式激振阀进行流-热-固多场耦合仿真,探究进出口压差分别为ΔP=5 MPa、ΔP=10 MPa、ΔP=15 MPa和油液温度分别为20℃、40℃、60℃时旋转式激振阀的热特性与热变形规律。研究结果表明,旋转式激振阀内部流场和温度场分布不均匀,流体在接近阀芯阀体壁面处的温度较高,中心温度较低,旋转式激振阀出口处由于流体冲击产生局部高温,导致阀芯凹槽以及阀体出油口会有热变形,进出口压差ΔP=15 MPa时,热变形可达3.789 4μm;进油温度为60℃时,热变形可达7.701 7μm。因此选择合适的进出口压差和油液温度有利于旋转式激振阀的工作特性。该研究对于旋转式激振阀的结构设计和优化提供了理论数据。The rotary excitation valve is one of the key components for the high-frequency and high-pressure electro-hydraulic excitation system, and its dynamic characteristics directly affect the performance of the entire excitation system.In order to study the dynamic characteristics of the rotary excitation valve under the coupling effect of Fluid-Thermal-Solid multi-field. First, the flow field of the rotary excitation valve was dynamically simulated by the sliding grid method through Fluent simulation, and the simulation results were verified by the measured flow rate of the rotary excitation valve. Then, the Fluid-Thermal-Solid multi-field coupling simulation of the rotary excitation valve was performed by using ANSYS. The thermal characteristics and thermal deformation laws of the rotary excitation valve was studied when the pressure difference between inlet and outlet ΔP are 5 MPa, 10 MPa, 15 MPa and the oil temperature are 20℃, 40℃, 60℃ respectively. The research results show that the internal flow field and temperature field of the rotary vibration valve are not uniformly distributed. The temperature of fluid near the valve core and the wall of valve body is higher, and the center temperature is lower.Due to the impact of the fluid at the outlet of rotary excitation valve, a local high temperature will be generated, resulting in thermal deformation of the valve core groove and the valve body outlet port.When the pressure difference between inlet and outlet at 15 MPa, the thermal deformation is 3.789 4 μm, and the oil inlet temperature at 60℃, the thermal deformation is 7.701 7 μm. Therefore, choosing the pressure difference between inlet and outlet and oil temperature is beneficial to the operational characteristics for rotary excitation valve. The theoretical data for the structural design and optimization of the rotary excitation valve are provided.

关 键 词：旋转式激振阀 流场 流-热-固耦合 热变形 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]