液黏传动双圆弧油槽参数对转矩特性影响的研究

发布时间：2018-04-18 02:18

  本文选题：液黏传动 + 双圆弧油槽　； 参考：《太原理工大学》2017年硕士论文

【摘要】：为了满足刮板输送机平稳启动与可靠运行的需求,延长相关机械设备的使用寿命,可控启动装置广泛运用于煤矿综采装备中。可控启动装置的核心部分是液黏传动装置。双圆弧油槽摩擦副对液黏传动装置的流场特性与转矩特性影响显著。但当考虑油槽结构参数时,摩擦副间流场的数值模拟过程繁琐且重复性强,所以针对双圆弧油槽参数对转矩特性研究甚少,因此有必要寻找一种经济准确的研究方法,对双圆弧油槽结构参数进行准确研究的同时,辅助摩擦副的设计。本文研究了双圆弧油槽参数对液黏传动输出转矩的影响,利用多学科优化软件iSIGHT建立了集油槽结构参数化设计、流场数值模拟、试验设计与参数优化为一体的油槽参数优化平台,以改善液黏传动装置转矩特性,优化了双圆弧油槽结构参数。推导分析了纯油膜剪切阶段油膜剪切转矩与油液冲击转矩的形成机理,建立了液黏传动输出转矩的数学模型。分析了液黏传动摩擦副双圆弧油槽宽度、油槽对数、偏心距、内圈偏心圆直径与油槽深度对液黏传动装置输出转矩的影响。结果表明:在纯油膜阶段液黏传动输出转矩主要由油膜剪切作用产生的剪切转矩与油液冲击转矩组成。油槽宽度减小、油槽对数降低、偏心圆内圈直径减少、偏心距增大都可以使液黏传动的输出转矩增大;而油槽深度变化会使液黏传动装置输出转矩产生波动。利用正交数组进行试验设计,建立了RSM响应曲面近似模型,探究了各个参数的敏感性、主效应与交互效应。偏心距与内圈偏心圆直径是影响液黏传动输出转矩的敏感因素,且两者间具有较强的交互作用。利用ASA算法模拟了退火过程,以提高液黏传动装置输出转矩为优化目标对双圆弧油槽参数进行了优化,寻找出油槽参数的最佳配置。集CAD参数化建模、CFX流场数值模拟、DOE试验设计、RSM近似模型与ASA模拟退火算法为一体的iSIGHT油槽参数分析优化平台,可以大大减少计算代价,提高设计效率,为液黏传动装置摩擦副油槽设计提供一种可行的方法与理论基础。
[Abstract]:In order to meet the need of smooth start and reliable operation of scraper conveyor and prolong the service life of related machinery and equipment, controllable starting device is widely used in fully mechanized mining equipment of coal mine.The core part of the controllable starting device is the fluid-viscosity drive.The friction pair of double circular arc oil grooves has a significant effect on the flow field and torque characteristics of the fluid viscosity transmission.But when considering the structural parameters of the oil tank, the numerical simulation process of the flow field between the friction pairs is cumbersome and repetitive, so there is little research on the torque characteristics of the double-arc oil tank parameters, so it is necessary to find an economical and accurate research method.At the same time, the design of friction pair is aided while the structural parameters of double arc oil tank are studied accurately.In this paper, the influence of double circular arc oil tank parameters on the output torque of fluid viscosity transmission is studied. The parametric design of the oil tank structure and the numerical simulation of the flow field are established by using the multidisciplinary optimization software iSIGHT.In order to improve the torque characteristics of the hydraulic viscous transmission device and optimize the structural parameters of the double circular arc oil tank, the oil tank parameter optimization platform is designed and optimized.The forming mechanism of oil film shearing torque and oil liquid impact torque in pure oil film shearing stage is deduced and analyzed, and the mathematical model of hydraulic viscosity transmission output torque is established.The effects of the width, logarithm, eccentricity, diameter of inner ring eccentric circle and depth of oil groove on the output torque of hydraulic viscosity transmission are analyzed.The results show that the output torque of fluid viscosity transmission in pure oil film stage is mainly composed of shearing torque produced by oil film shearing and oil liquid impact torque.The width of oil tank decreases logarithm of oil tank decreases the diameter of inner ring of eccentric circle decreases and eccentricity increases the output torque of fluid viscosity transmission while the variation of oil tank depth will cause the output torque of fluid viscosity transmission to fluctuate.An approximate model of RSM response surface is established by using orthogonal array, and the sensitivity, main effect and interaction effect of each parameter are discussed.Eccentricity and inner ring eccentricity circle diameter are the sensitive factors that affect the output torque of fluid viscosity transmission, and there is a strong interaction between them.The annealing process is simulated by ASA algorithm. The parameters of double circular arc oil tank are optimized with the aim of improving the output torque of fluid viscosity transmission. The optimal configuration of the tank parameters is found.CAD parameterized modeling and numerical simulation of CFX flow field the CAD approximate model and ASA simulated annealing algorithm are integrated into a iSIGHT oil tank parameter analysis and optimization platform, which can greatly reduce the calculation cost and improve the design efficiency.It provides a feasible method and theoretical basis for the design of the oil groove of the friction pair of the fluid viscosity transmission device.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD528.3

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