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负载对气缸缓冲性能影响的研究

发布时间:2019-01-10 11:15  文章来源:笔耕文化传播
【摘要】:目前国内外很多气动元件供应商都已研发出了高性能的内置全机械结构式的缓冲气缸,但是存在的最大缺陷是气缸的良好缓冲状态受工况变化范围很小,当供气压力、质量负载或气缸的流速任何一种参数变化后,人为调整好的气缸缓冲状态就会受到破坏,从而出现爬行、反弹、撞击端盖等降低气缸寿命及工作效率的现象;而可自调整的缓冲气缸虽可适应一定的工况变化,但是离实际批量生产应用还有一定距离,因此对工况变化引起缓冲性能变化的研究显得非常关键。 本课题针对质量负载变化对缓冲性能的影响进行深入研究,阐述负载变化破坏缓冲性能的机理,进行缓冲气缸仿真和实验分析,进而提出负载变化自调整缓冲气缸的方案。 基于气体动力学建立了缓冲气缸关于能量、流量和运动的数学模型,为缓冲气缸的仿真及实验分析奠定理论基础。 以Delphi编程语言为开发环境,基于龙格库塔法对缓冲气缸的数学模型进行数值求解,得到缓冲气缸不同结构参数下气缸位移、速度、加速度及各腔室压力的运动变化曲线。 搭建了缓冲气缸的缓冲性能测试实验台,根据各传感器的输入输出数学关系并基于Matlab的RTW模块设计了气缸缓冲性能数据采集程序。 通过实验研究分析了负载变化对普通缓冲气缸及高速气缸缓冲性能的影响。通过大量的实验得到了不同负载下气缸位移、速度、加速度及各腔室压力的运动变化曲线。对气缸不同缓冲状态下表现出来的爬行、撞击或严重反弹等现象进行了分析,并进行了气缸缓冲能量的理论推导与实验计算,提出了负载在一定变化范围内的自调整缓冲气缸的方案。
[Abstract]:At present, many domestic and foreign pneumatic component suppliers have developed high performance fully mechanically built-in cushioning cylinders. However, the biggest defect is that the good buffer state of the cylinders varies very little by the working conditions, when the air supply pressure, After the change of any parameter of mass load or cylinder velocity, the artificially adjusted cylinder buffer state will be destroyed, which will result in the phenomena of crawling, rebounding and impingement on the end cap to reduce the cylinder life and working efficiency. Although the self-adjustable buffer cylinder can adapt to certain operating conditions, it is still far away from the actual batch production, so it is very important to study the change of buffer performance caused by the change of working conditions. In this paper, the effect of load change on buffer performance is studied in depth, the mechanism of load change destroying buffer performance is expounded, the simulation and experimental analysis of buffer cylinder are carried out, and the scheme of self-adjusting buffer cylinder with load variation is put forward. Based on the gas dynamics, the mathematical models of the energy, flow and motion of the buffer cylinder are established, which lays a theoretical foundation for the simulation and experimental analysis of the buffer cylinder. Taking Delphi programming language as the development environment, the mathematical model of the buffer cylinder is solved numerically based on Runge-Kutta method, and the displacement, velocity, acceleration and pressure change curves of the cylinder under different structural parameters of the buffer cylinder are obtained. The buffer performance test bench of the buffer cylinder was built. According to the relationship between the input and output of the sensors and the RTW module of Matlab, the data acquisition program of the buffer performance of the cylinder was designed. The effect of load variation on the buffering performance of ordinary and high speed air cylinders is analyzed experimentally. Through a large number of experiments, the displacement, velocity, acceleration and pressure curves of the cylinder under different loads are obtained. The phenomena of crawling, impingement or severe rebound of cylinder under different buffer states are analyzed, and the theoretical derivation and experimental calculation of cylinder buffer energy are carried out. The scheme of self-adjusting buffer cylinder with load varying in a certain range is put forward.
【学位授予单位】:大连海事大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TH138.51

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