湿式多片摩擦离合器流场动态仿真及流道优化

发布时间：2018-05-05 19:24

本文选题：离合器 + 动态仿真　；参考：《重庆大学》2012年硕士论文

【摘要】：湿式多片摩擦离合器具有体积小、传递扭矩大、控制系统简单、启动换向平稳等优点，广泛应用于船舶驱动系统中。由于船用齿轮箱倒顺离合器成对安装，处于空转状态的离合器中摩擦片与对偶片相对线速度倍增，若分片不均匀，片间油层较薄的摩擦片可能因油膜剪切发热而快速升温，出现过热现象。因此，开展离合器分片过程流场动态仿真、热流耦合分析及油路结构优化的研究，对解决离合器过热失效问题具有重要理论意义和工程应用价值。本文课题来源于重庆市科技攻关计划项目。针对船用齿轮箱中的湿式多片摩擦离合器，进行流场动态仿真及油路优化，主要研究工作如下： ①以摩擦片及对偶片的瞬态运动方程作为流场移动边界，结合离合器的结构及使用工况，在ANSYS/CFX软件中建立湿式多片摩擦离合器油路流场的参数化有限元模型，采用动网格技术，对离合器分片过程进行动态仿真，研究润滑油入口流量对分片状态的影响规律。 ②考虑润滑油粘温特性及油膜剪切对离合器油路能量方程的影响，建立离合器实际油路的热流耦合有限元模型，通过计算流体动力学分析，得出润滑油入口流量对润滑油温度场的影响，并与试验结果进行对比。 ③建立带螺旋油槽及径向油槽的摩擦片间润滑油参数化有限元模型，进行热流耦合分析，得到片间油层压力、速度及温度分布规律，研究油层厚度及油槽参数对润滑油温度的影响。 ④以喷油孔位置及油孔直径为设计变量，离合器最大和最小工作油压为约束条件，各摩擦片及对偶片所受油压的均方根值为目标函数，利用ANSYS/Workbench软件，构建离合器油路流场优化模型，采用响应面法对油路结构进行优化。
[Abstract]:The wet multi-disc friction clutch has the advantages of small volume, large torque transfer, simple control system, smooth starting and commutation, etc. It is widely used in the ship driving system. Because of the pairwise installation of the marine gear box reverse clutch, the relative linear velocity of the friction disc and the dual plate in the idle state of the clutch is doubled. If the slice is not uniform, the friction sheet with a thinner oil layer may be heated rapidly because of the heat of the oil film shearing. There is overheating. Therefore, it is of great theoretical significance and engineering application value to carry out the dynamic simulation of the flow field, the analysis of the heat flux coupling and the optimization of the structure of the oil circuit in the process of clutch splitting. This paper comes from the project of Chongqing Science and Technology Project. In view of wet multi-disc friction clutch in marine gear box, the flow field dynamic simulation and oil circuit optimization are carried out. The main research work is as follows: 1 taking the transient motion equation of friction plate and dual plate as the moving boundary of flow field, combining the structure and working condition of clutch, the parameterized finite element model of oil flow field of wet multi-disc friction clutch is established in ANSYS/CFX software, and the dynamic mesh technology is adopted. The dynamic simulation of clutch slicing process was carried out to study the influence of lubricating oil inlet flow rate on the slice state. (2) considering the viscosity and temperature characteristics of lubricating oil and the effect of oil film shear on the energy equation of clutch oil path, the heat flow coupling finite element model of clutch actual oil path is established, and the fluid dynamics analysis is carried out. The influence of lubricating oil inlet flow rate on the temperature field of lubricating oil is obtained, and the results are compared with the test results. (3) the parametric finite element model of lubricating oil between friction discs with spiral and radial oil grooves is established, and the heat flow coupling analysis is carried out, and the distribution of pressure, velocity and temperature of interlamellar oil layer is obtained. The effects of reservoir thickness and tank parameters on the temperature of lubricating oil were studied. (4) taking the position of the injection hole and the diameter of the oil hole as the design variables, the maximum and minimum working oil pressure of the clutch as the constraint condition, and the root mean square value of the oil pressure of the friction plates and the dual plates as the objective function, the ANSYS/Workbench software is used. The optimization model of clutch oil flow field is constructed, and the structure of oil path is optimized by response surface method.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.4

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