液压变压器效率特性的测试与分析  

Test and analysis on the efficiency of hydraulic transformer

作　　者：马吉恩[1] 杨华勇[1] 徐兵[1] 欧阳小平[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第7期1231-1235,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50305032);国家"十一五"科技支撑计划资助项目(2006BAF01B01;2006BAF01B04)

摘　　要：针对液压变压器效率低的问题,对其效率特性进行数学模型的理论分析和修正,并通过实验测试对比的方法进行了研究,掌握其规律特点.对效率特性的数学模型进行改进,引入了考虑机械能损耗以及热能损耗影响的损耗系数,对效率计算分界点问题提出按照调压比特性进行划分.利用液压变压器性能测试实验台,对其效率特性进行实验研究发现,液压变压器的效率特性满足液压泵/马达的效率无因次特性曲线;效率与其控制角度之间有着密切的关系;机械效率随转速的增加而降低,随控制角度的增加而提高;总效率随油源压力的增加而增加;总效率存在最高效率转速点.Experimental test was conducted on the efficiency of hydraulic transformer to compare with the theoretical analysis and optimization aiming at the low efficiency of hydraulic transformer. The mathematical model on efficiency was improved by considering the mechanical and heat energy loss. Transformation ratio was set to be the dividing line of different efficiency formulas. Efficiency characteristics were experimentally studied with the test rig of hydraulic transformer. Experimental results show that the hydraulic transformer efficiency matches the dimensionless performance of piston pump/motor and has a close relationship with control angle. Mechanical efficiency decreases with rotation speed, while increases with control angle. The total efficiency increases with the source pressure and reaches the maximum at a rotation speed point.

关 键 词：液压变压器 恒压网络 柱塞泵 

分 类 号：TH137.5[机械工程—机械制造及自动化]