径向型MHCPE锥形配流阀动力特性仿真及优化设计

发布时间：2018-04-13 15:59

本文选题：径向型MHCPE + 锥形配流阀　；参考：《青岛大学》2012年硕士论文

【摘要】：机械液压约束活塞发动机(Mechanical Hydraulic Confined Piston Engine,简称MHCPE)是一种将传统的活塞式内燃机和柱塞泵的结构原理和技术特点融合一体的新型动力装置。对六缸径向型MHCPE锥形配流阀工作过程进行了仿真研究,并对锥阀的结构进行了优化设计。根据液压锥阀的动力特性,综合考虑液压油的可压缩性以及泵阀运动魏氏效应(Westphal)对液缸内液压油连续流影响,建立了锥形配流阀动力特性数学模型。依据研制的36114ZG4B型六缸径向MHCPE样机参数,对其锥形配流阀的工作过程进行了仿真分析。结果表明：在额定转速内,锥形配流阀的位移、速度、加速度运动性能较为稳定,但是还存在随转速变化产生的液压油压力尖角及锥阀开启和关闭滞后角问题,系统受滞后角的影响,容积效率低。以整机容积效率为目标函数,以动力缸工作循环的输出流量以及锥阀设计的边界条件为约束条件,以锥阀的结构参数为设计变量,建立了优化模型,并利用iSIGHT优化软件进行优化了设计。优化结果表明优化后锥形配流阀的工作性能得到了改善,运行更加的平稳合理,而且MHCPE整机系统的容积效率得到了提高。
[Abstract]:Mechanical Hydraulic Confined Piston Engineering (MHCPEE) is a new type of power device which integrates the structure principle and technical characteristics of the traditional piston internal combustion engine and piston pump.The working process of the six cylinder radial MHCPE conical valve is simulated and the structure of the conical valve is optimized.According to the dynamic characteristics of hydraulic cone valve, considering the compressibility of hydraulic oil and the effect of pump valve motion on the continuous flow of hydraulic oil in cylinder, a mathematical model of dynamic characteristics of conical distribution valve is established.According to the parameters of the 36114ZG4B six cylinder radial MHCPE prototype, the working process of the conical flow distribution valve is simulated and analyzed.The results show that the displacement, velocity and acceleration of the conical valve are stable within the rated speed, but there are still the problems of the pressure sharp angle of hydraulic oil and the lag angle of opening and closing of the conical valve.The system is affected by the lag angle and the volume efficiency is low.Taking the volumetric efficiency of the whole machine as the objective function, taking the output flow of the working cycle of the power cylinder and the boundary conditions of the design of the cone valve as the constraint conditions, taking the structural parameters of the cone valve as the design variables, the optimization model is established.ISIGHT optimization software is used to optimize the design.The optimization results show that the performance of the conical valve is improved, the operation is more stable and reasonable, and the volume efficiency of the whole MHCPE system is improved.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH134

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