液压自由活塞发动机的活塞运动不对称特征研究

doi:10.3969/j.issn.1000-1093.2012.07.008

兵工学报 ›› 2012, Vol. 33 ›› Issue (7): 810-815.doi: 10.3969/j.issn.1000-1093.2012.07.008

液压自由活塞发动机的活塞运动不对称特征研究

吴维，苑士华，胡纪滨，荆崇波

(北京理工大学车辆传动国家重点实验室，北京 100081)

收稿日期:2011-12-07 修回日期:2011-12-07 上线日期:2017-02-28
作者简介:吴维（1983—），男，讲师，博士
基金资助:
“十二五”国家部委基础科研项目（B2220110005）

Study on the Asymmetry Characteristics of Piston Motion of the Hydraulic Free Piston Engine

WU Wei， YUAN Shi-hua， HU Ji-bin， JING Chong-bo

(National Key Laboratory of Vehicular Transmission, Beijing Institute of Technology,Beijing 100081, China)

Received:2011-12-07 Revised:2011-12-07 Online:2017-02-28

摘要/Abstract

摘要： 结合液压自由活塞发动机基本原理，建立了系统分析模型，通过仿真和样机试验结果分析了活塞运动不对称性及其影响因素。研究结果表明：液压自由活塞发动机活塞上止点运动呈现不对称性特征，能量传递特征和活塞受力特征决定了该不对称性是固有的。在上止点附近，气体压力对活塞运动状态起决定性作用，活塞压缩过程越快，对应的膨胀过程也越快。配流阀响应对活塞上止点运动状态影响不明显，不同负载压力形成位置主要影响膨胀过程后期。

关键词: 流体传动与控制, 自由活塞发动机, 液压, 活塞运动, 不对称性

Abstract: Based on the hydraulic free piston engine fundamental theory, the analytical model of the system was built. The asymmetry of the piston motion and the influencing factors were investigated by simulation and prototype tests. The results indicate that the piston motion around top dead center of the single piston hydraulic free piston engine appears asymmetry. The energy transfer characteristics and the forces on the piston around top dead center determined that the asymmetry characteristic is inherent. The piston motion around top dead center is mainly determined by the cylinder gas pressure. The faster the compression procession is, the faster the expansion process is. The responses of the distributing valves affect the piston motion around top dead center little. The operation position of the load pressure mainly affects the end of the expansion process.

Key words: turn and control of fluid, free piston engine, hydraulic, piston motion, asymmetry

中图分类号:

TH137

吴维，苑士华，胡纪滨，荆崇波. 液压自由活塞发动机的活塞运动不对称特征研究[J]. 兵工学报, 2012, 33(7): 810-815.

WU Wei， YUAN Shi-hua， HU Ji-bin， JING Chong-bo. Study on the Asymmetry Characteristics of Piston Motion of the Hydraulic Free Piston Engine[J]. Acta Armamentarii, 2012, 33(7): 810-815.

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液压自由活塞发动机的活塞运动不对称特征研究

Study on the Asymmetry Characteristics of Piston Motion of the Hydraulic Free Piston Engine

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