蓄能器主要参数对快锻机回程系统动态特性的影响

发布时间：2018-05-22 14:19

本文选题：气囊式蓄能器 + 活塞式蓄能器　；参考：《兰州理工大学》2017年硕士论文

【摘要】：作为液压系统中重要元件,蓄能器在快锻液压机组中被大量应用,其在改善快速锻造液压机组回程系统的动态性能和保持快速锻造液压机组回程系统工作稳定性等方面起着重要的作用。所以,在快速锻造液压机组回程系统中,研究如何选择合适的蓄能器就很有必要。本文分别对气囊式蓄能器以及活塞式蓄能器对快速锻造液压机组回程系统的动态特性进行了仿真分析和实验研究,为蓄能器的选择提供必要的理论支撑。(1)从蓄能器结构出发,对其工作过程做了简要描述,并建立了气囊式蓄能器和活塞式蓄能器的数学模型,得到了气囊式蓄能器和活塞式蓄能器影响快速锻造液压机组回程系统的动静态特性的主要参数。接下来,建立了快速锻造液压机组回程系统的比例阀流量方程,回程缸的流量连续性方程,回程缸和活动横梁的力平衡方程以及位置传感器的数学模型。(2)以10MN快锻液压机组为例,采用AMEsim软件搭建含气囊式蓄能器的快速锻造液压机组回程系统和含活塞式蓄能器的快速锻造液压机组回程系统的仿真模型,进一步分析这两种蓄能器对快速锻造液压机组回程系统的影响。对比发现,在快速锻造液压机组锻造频次方面,采用含活塞式蓄能器的快速锻造液压机组回程系统是含气囊式蓄能器的快速锻造液压机组回程系统的1.17倍。(3)依据10MN快速锻造液压机组回程系统设计了实验方案,分别对活塞式蓄能器在不同初始充气压力和容积对锻造频次的影响进行了仿真和实验对比发现,实验结果与仿真结果基本吻合。
[Abstract]:As an important component in hydraulic system, accumulator is widely used in rapid forging hydraulic press. It plays an important role in improving the dynamic performance of the return system of the rapid forging hydraulic unit and maintaining the working stability of the return system of the rapid forging hydraulic unit. Therefore, it is necessary to study how to select suitable accumulator in the return system of fast forging hydraulic unit. In this paper, the dynamic characteristics of air bag accumulator and piston accumulator for the return system of rapid forging hydraulic unit are simulated and experimentally studied, which provides the necessary theoretical support for the selection of accumulator. The working process is described briefly, and the mathematical models of airbag accumulator and piston accumulator are established. The main parameters which affect the static and static characteristics of the return system of the hydraulic unit with rapid forging are obtained by air bag accumulator and piston accumulator. Then, the proportional valve flow equation and the flow continuity equation of the return system of the rapid forging hydraulic unit are established. The force balance equation of the return cylinder and the moving beam and the mathematical model of the position sensor.) take the 10MN rapid forging hydraulic press set as an example. The AMEsim software is used to build the simulation model of the return system of the rapid forging hydraulic unit with air bag accumulator and the quick forging hydraulic unit with piston accumulator. The influence of the two accumulators on the return system of the rapid forging hydraulic unit is further analyzed. It is found that, in terms of forging frequency of rapid forging hydraulic units, The return system of rapid forging hydraulic unit with piston accumulator is 1.17 times of that of fast forging hydraulic unit with air bag accumulator. The experimental scheme is designed according to 10MN rapid forging hydraulic unit return system. The effects of different initial pressure and volume of piston accumulator on forging frequency are simulated and compared with each other. The experimental results are in good agreement with the simulation results.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG315.4

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