低速大扭矩水压马达柱塞副的结构优化及性能研究  

Structural optimization and performance research on the piston pair of low speed high torque water hydraulic motor

作　　者：王志强[1,2] 高殿荣[1,2] 黄瑶[1,2] 

机构地区：[1]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004 [2]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004

出　　处：《煤炭学报》2013年第A02期536-542,共7页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51075348);河北省自然科学基金资助项目(E2011203151);高等学校博士学科点专项科研基金资助项目(20101333110002)

摘　　要：以低速大扭矩水压马达的柱塞副为研究对象,确定了水压马达的初始参数;基于力平衡方程及流量方程,建立了功率损失和动态的数学模型。以总功率损失、滚球速度和位移作为柱塞副的性能指标,分析了水膜厚度对柱塞性能的影响。通过分析柱塞副的静压支承特性原理,以柱塞副总功率损失最小为目标函数建立了影响柱塞副静压支承性能的优化模型,对柱塞副的结构进行了优化设计,得出在θ0为19°,柱塞底部直径为15 mm,阻尼孔直径为0.18 mm时,柱塞副支承腔的水膜厚度最佳,为2.027μm。研究表明:结构优化后的柱塞副具有功率损失低、润滑性能好、静压支承性能及动态性能高的特点。Abstract：The aim of this paper was to find an optimal configuration to improve the static and dynamic characteristics of the piston pair. Based on the equilibrium equation and the flow equation,the mathematical models of the power loss and the dynamic characteristics were established. The total power loss, the velocity and the displacement of roll ball can be the performance indexes of the piston pair. Different size of the water film thickness has different performance indexes. So the influence of the water film thickness on the piston pair was analyzed in detail. An optimal model, with the minimum of the total power loss of the piston pair as optimization objective, was established, which refers to the hydrostatic bearing characteristics of piston pair. The parameters of piston pair were obtained by optimum design. When θ0 is 19°, the diameter of piston tail is 15 mm and the diameter of damper orifice is 0.18 ram, the optimum water film thickness of piston pair is 2. 027μm. The research shows that optimized piston pair has lower power loss, good lubricating performance, and higher static and dynamic performance. Key words： water hydraulic motor; water film thickness ; piston pair ; optimization model ; power loss

关 键 词：水压马达 水膜厚度 柱塞副 优化模型 功率损失 

分 类 号：TH137[机械工程—机械制造及自动化]