基于电容测微原理的气缸活塞泄漏研究

发布时间：2018-06-19 15:47

  本文选题：电容测微 + 活塞泄漏　； 参考：《浙江大学学报(工学版)》2016年04期

【摘要】：针对气浮无摩擦气缸的活塞泄漏流量大且难以直接建模的特点,提出基于电容测微原理的活塞耗气量建模方法.以活塞外圆柱面与缸筒内壁构成的偏心圆柱电容器的电容为研究对象,以高精度的流量测试系统为基础,设计一套测量装置,研究气体轴承在单侧供气的情况下电容与供气压力及耗气量之间的关系.结果表明,活塞在缸筒内的偏心与电容呈现出显著的函数变化规律,可以作为研究活塞偏心的间接手段,提出活塞工作状态的指示变量及实现方法;以电容作为衡量活塞偏心的手段,以实验数据为基础建立供气压力与耗气量的离线数学模型,在保证精度的基础上避免了对活塞偏心直接测量,简化了建模工作.
[Abstract]:In view of the characteristics that the piston leakage flow rate is large and it is difficult to model directly, a method of piston air consumption modeling based on the principle of capacitance micrometer is proposed. Taking the capacitance of the eccentric cylindrical capacitor composed of the piston outer cylinder and the cylinder inner wall as the research object, a set of measuring device is designed based on the high precision flow measurement system. The relationship between capacitance and gas supply pressure and gas consumption of gas bearing under the condition of one side gas supply is studied. The results show that the eccentricity and capacitance of the piston in the cylinder have a remarkable function variation law, which can be used as an indirect means to study the piston eccentricity, and the indication variable and the realization method of the piston working state are put forward. Based on experimental data, an off-line mathematical model of gas supply pressure and gas consumption is established by using capacitance as a measure of piston eccentricity, which avoids the direct measurement of piston eccentricity on the basis of ensuring accuracy and simplifies the modeling work.
【作者单位】： 浙江大学流体动力与机电系统国家重点实验室;
【基金】：国家自然科学基金资助项目(51375430;51375432)
【分类号】：TH138.51
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本文编号：2040387