毕业设计（论文）-变频泵控制调速型液力偶合器.doc

摘要
偶合器的主要部件有:泵轮、涡轮、输入轴、输出轴等。
泵轮与涡轮称为工作轮,两轮中均有叶片,两轮分别与输入、输出轴相联接,它们之间是有间隙的,泵轮和涡轮均有径向尺寸相同的腔形,所以,合在一起形成工作油腔室,工作油从泵轮内侧入油口引入,并跟随电机一起作旋转运动,油在离心力的作用下,被甩到外侧,构成了一个油的循环。
无论何种的液力偶合器主要都是由输入轴、输出轴、泵轮、涡轮、轴承以及一些密封件组成。本设计都会对以上各个偶合器基本的部件进行严谨的科学计算,来完成结构设计和校核,使其实现设计要求中的功能。而液力偶合器的种类有很多种,液力偶合器按其应用特性可分为3个基本类型:普通型,限矩型,调速型。调速型液力偶合器是在输入转速不变的情况下,通过改变工作腔充满度来改变输出转速及力矩,即所谓的容积式调节。与普通型、限矩型液力偶合器可自身冷却散热的特点不同,调速型液力偶合器因自身结构原因和其输出转速调节幅度大、传递功率大的特点,必须有工作液体的外循环和冷却系统,使工作液体不断地进出工作腔,以调节工作腔的充满度和散逸热量。
将以上基本的调速型液力偶合器的大部分组件设计完成之后,对传统的调速型液力偶合器通过电动执行器驱动曲柄滑块机构来带动导液管径向伸缩,调节工作腔充满度以改变输出转速及力矩中存在的实现调速过程的时间长不够灵敏等问题,对带动导液管的执行机构进行创新,改用变频电动机控制泵来调节进油管中进油量,从而调节工作腔充满度来改变输出转速及力矩,以实现调速过程快和灵敏度,辅件易于安装,油路简易易安装。通过先前数据完成必要的结构设计和计算,根据设计要求完成泵的计算,选择电动机等从而对偶合器进行精确的参数计算。
关键词:轴叶轮轴承涡轮变频机
ABSTRACT
A fluid coupling mainly consists of:pump, turbine, shell, input shaft and output shaft etc.. Commonly the shell and the pump is connected by a bolt.
Both the pump and the turbine are blade rotors, and there are blades in these two rotors. The pump is connected to the input shaft, and the turbine is connected to the output shaft. There is a gap between the pump and the turbine ,and the sizes inside the two rotors are the same. Thus these two rotors create a working space for rotating the fluid. The hydraulic fluid is directed by the 'pump' whose shape forces the flow in the direction of the output turbine.
Any kind of fluid coupling is mainly consists of input shaft, output shaft, pump, turbine, shell and some ponents. This design will execute a precisely scientific calculation on ponents, in order to perfectly plish the functions that acquired. And according to its function, the fluid coupling is divided as general fluid coupling ,fix fill fluid coupling and variable fill fluid coupling. Under constant speed,the variation in speed is obtained by change of quantity of oil in the main circuit through scoop tube movement, sliding in & out. Unlike the other two kinds of fluid coupling, variable fill fluid coupling is not able to dispatch the h