【摘要】 喷嘴挡板式三通气动阀控不对称缸常用于航空发动机起动系统的引气控制。在分析由固定节流孔、喷嘴挡板可变节流孔和容腔组成的喷嘴挡板式气动三通阀原理的基础上,建立了气动三通阀控不对称缸差动系统的数学模型,得到了气源、控制阀与气缸结构参数对三通阀控缸静、动态特性的影响规律。研究发现,通过增大空气填充速率和减少空气需求,可以提高喷嘴挡板式三通气动阀控缸的响应速度,例如增大喷嘴挡板式气动三通阀的固定节流孔直径、减小活塞有效面积、提高供气压力等;理论分析结果与实践结果一致。更多还原

【Abstract】 It is commonly used to bleed air in aero-engines system with the asymmetric cylinder of the three-way pneumatic valve control cylinder which is composed of a fixed orifice,a variable orifice with different nozzle-flapper type and a vessel.Based on the theory of the valve control cylinder,we have built up the mathematical model of the pneumatic three-way asymmetric cylinder differential system,and got the influence rule of air source,control valve and the cylinder’s structure parameters for the cylinder’s static and dynamic characteristics.The cylinder’s response speed can be improved by measures for increasing air filling rate and reducing air requirements,such as increasing fixed orifice diameter,reducing the piston effective action area,increasing air source pressure and so on.The theoretical analysis is consistent with experimental results.更多还原