液黏调速离合器离心式油腔设计及其特性  

Design and characteristic of lubricating oil chamber of hydro-viscous drive clutch

作　　者：廖湘平[1] 龚国芳[1] 周天宇[1] 彭雄斌[1] 

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《排灌机械工程学报》2014年第12期1062-1067,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家973计划项目(2013CB035400);国家863计划项目(2012AA041803);国家自然科学基金创新研究群体科学基金资助项目(51221004)

摘　　要：液黏调速离合器是一种依靠多油膜剪切力传递扭矩的装置,尤其适合于大型风机、水泵等工程机械调速节能.由于其各摩擦副润滑油入口处油压、流量大小无法保证均匀一致,在实际工程应用中往往出现摩擦副过热、变形、偏磨等问题.为了解决此类问题,提出了一种新型离心油腔式液黏调速离合器.理论分析表明:充分利用油腔离心力的甩油作用可使得润滑油均匀地甩入各摩擦副.另外,基于流体动力学理论,建立了2种不同结构的三维流场模型,应用Fluent对流场进行数值模拟计算,研究了油腔结构和普通油道结构对喷油孔处压力和流速的分布规律.仿真结果表明:离心式油腔的设计可显著提高液黏调速离合器各摩擦副润滑油入口处油压及流量的均匀性,从而提升液黏调速离合器的工作性能,延长其工作寿命.Hydro-viscous drive （HVD） clutch is a type of power transmission device using shear stress of multi-oil films, and it is especially applied to regulate speed for large fans and pumps. However, u- niform pressure and velocity of lubricating oil film between friction pairs are difficult to achieve, which can lead to over heating, deformation and uneven wear problem for the frictional disks of HVD clutch. In order to solve the problems, a new type of HVD clutch with a centrifugal oil chamber was proposed. Consequently, the lubricating oil can get into the entrance to friction pairs uniformly under the centrifu- gal force. Based on the fluid dynamic theory, three-dimensional flow field models of two different oil channel structures were established. Furthermore, the numerical simulation of the flow field of different lubricating oil channel was conducted by the Fluent. The influence of the oil channel structure on pres- sure and velocity distribution of the entrance to friction pair was researched. The results show that the centrifugal oil chamber design and improve the uniformity of pressure and velocity of the entrance to friction pairs, and greatly improve the working performance and service life for HVD clutch.

关 键 词：液黏调速离合器 离心式油腔 计算流体动力学 油压 

分 类 号：S277.9[农业科学—农业水土工程] TH133.4[农业科学—农业工程]