基于动网格的旋转液压伺服关节内部流场数值模拟  

Numerical Simulation of Internal Flow Field in Rotary Hydraulic Servo Joint Based on Dynamic Mesh

作　　者：胡琪[1] 曾良才[1] 蒋林[1] 

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《机床与液压》2014年第13期123-129,共7页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(61105086);国家重点实验室开放基金资助项目(SKLRS-2010-MS-12)

摘　　要：为了研究旋转液压伺服关节自伺服特性和内部流场的瞬时流动情况,利用Fluent软件中的动网格和UDF技术对其内部流场进行了动态数值模拟,并分析了其内部流场中的压力、流速及叶片受力的瞬时变化规律。结果表明:该模拟方法突破了以往CFD稳态模拟的局限,更能真实地模拟出关节内部流场的瞬时变化情况,为关节优化设计提供了理论依据。通过分析可知该关节具有较好的自伺服特性,能在负载力矩为100 N·m情况下,完成对阀芯输入信号的快速跟随。In order to get self-servo characteristics and the instantaneous flow situation of internal flow field in rotary hydraulic servo joint,the dynamic numerical simulation was conducted with the dynamic mesh model and UDF offered by Fluent. The instantane-ous variations of the pressure,flow rate,and leaves’force of the internal flow field were analyzed. The results show that：this method breaks the limitations of previous CFD steady state simulation,is more realistically simulating the instantaneous variation of internal flow field in the joint,which provides a theoretical basis for the joint’optimized design. Through analysis,the joint has good self-servo characteristics. It can quickly follow the input signal of valve core in the load torque of 100 N＆#183;m.

关 键 词：旋转液压伺服关节 动网格 UDF 动态数值模拟 

分 类 号：TH137.5[机械工程—机械制造及自动化]