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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第1期    总第293期    2019年1月

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文章编号:1672-7207(2019)01-0052-07
无同步齿轮液压振动锤系统的马达泄漏特性及耦合同步条件
罗春雷,唐志清,莫鑫,陈珍颖

(中南大学 机电工程学院,高性能复杂制造国家重点实验室,湖南 长沙,410083)

摘 要: 为研究2个马达内部结构差异引起的油液泄漏差异对系统耦合同步能力的影响,以双马达无同步齿轮液压振动锤为对象,考虑液压系统和土的非线性,用流体力学、振动力学、土动力学和机电液耦合动力学理论建立系统耦合振动状态下机-电-液-桩-土整体系统的运动模型,运用Matlab/Simulink对该模型进行仿真研究,分析不同马达柱塞副间隙对系统同步振动的影响。研究结果表明:以马达A柱塞副间隙δ1=2.0×10-5 m为基准,当马达B柱塞副间隙δ1为(2.0~2.6)×10-5 m时,系统经过几秒钟振荡后能够实现同步振动;当马达B柱塞副间隙不在这一范围时,系统将无法实现同步振动;建模仿真结果反映了马达内部结构差异对系统耦合同步能力的影响,可为无同步齿轮液压振动机械液压系统的设计提供参考依据。

 

关键字: 液压振动锤;无同步齿轮;马达泄漏;耦合;同步

Coupled synchronization capability of motor internal leakage of hydraulic vibratory hammer system without synchronous gear
LUO Chunlei, TANG Zhiqing, MO Xin, CHEN Zhenying

State Key Laboratory of High Performance and Complex Manufacturing,
School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

Abstract:The hydraulic vibratory hammer without synchronizing gears was studied to obtain the effects of the structural differences between the two motors on coupling synchronization of the two-eccentric-rotary system. Taking the nonlinearity of hydraulic system and soil into account, the motion model of the system composed of machinery, clectron, hydraulics and soil was established under the coupled vibration condition based on the theory of fluid mechanics, vibration mechanics, soil dynamics and electromechanical fluid coupling dynamics. By means of Matlab/Simulink, the effects of different clearance values on the system synchronization were analyzed. The results show that the system can achieve synchronization after seconds of oscillation when the piston pair clearance value of the motor A (δ1=2.0×10-5 m) is taken as the benchmark and that of the motor B is within the range of (2.0-2.6)×10-5 m. But if the clearance value of the motor B is not in the range of (2.0-2.6)×10-5 m, the system can not achieve synchronization. The modeling and simulation correctly reflect the relationship between the internal structure of the motors and the system coupling synchronization, which can provide reference for the design of the hydraulic vibratory hammer.

 

Key words: hydraulic vibration hammer; without synchronizing gear; motor internal leakage; coupling; synchronization

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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