活塞式压缩机气量调节工况下的动力学分析

发布时间：2018-07-07 15:41

本文选题：活塞压缩机 + 气量无级调节　；参考：《浙江大学》2011年硕士论文

【摘要】：部分行程顶开进气阀排气量调节方式不仅实现了排气量全量程的无级连续调节,而且使压缩机仅压缩实际需要的气体,在减少排气量的同时也降低了能耗。然而,往复式压缩机使用气量无级调节系统后,出现了排气量低于设定值、活塞环磨损、气缸出现不正常的响声等故障,使此系统在国内推广应用受到了限制。因此,分析气量调节系统对压缩机的动力学影响,研究引发故障所产生的原因,使这种节能降耗的压缩机气量调节方法能够得到广泛应用是十分必要。论文以“十一五”科技支撑计划项目“高效节能压缩机关键技术研究”(编号：2008BAF34B13)为依托,对气量调节工况下的压缩机热力循环过程和气阀运动规律进行了较为深入的理论和实验研究；搭建了能够实现0～100%全量程气量无级调节的实验装置；建立了活塞与曲轴的机械运动模型,对气量调节工况下的压缩机机械动力学性能作了全面分析；通过实验测量与计算机模拟相结合的方法对液压系统进行分析,为排除因液压系统不正常造成的压缩机故障提供理论依据。本文的主要研究内容有： 1.研究了气量无级调节工况下压缩机热力循环模型,理论计算了排气量与进气阀顶开角度的变化规律,实验室压缩机试验表明计算结果同测量基本吻合。 2.研制了实验室无级气量调节系统及相关的信号测试系统与控制系统,为无级气量调节系统的运行状态监控及常见故障分析提供实验依据。 3.建立了压缩机气量调节运动模型,详细分析了对无级气量调节系统可能引起的压缩机力学性能的变化,和可能引发的典型故障及其解决方法。 4.通过实验测量与理论分析,对于无级气量调节系统中的关键装置—液压系统的常见故障进行了全面分析,并给出了相应的解决方案。研究结果为液压系统的管路布置与液压系统的设计提供了理论依据。
[Abstract]:The way of regulating the exhaust volume of the partial stroke ejector inlet valve not only realizes the stepless and continuous adjustment of the total range of exhaust volume, but also makes the compressor compress only the actual required gas and reduce the energy consumption while reducing the exhaust volume. However, after the reciprocating compressor uses the stepless regulating system of gas flow, the exhaust volume is lower than the set value, the piston ring is worn, the cylinder has abnormal noise and so on, which limits the popularization and application of the system in China. Therefore, it is necessary to analyze the dynamic effect of the gas volume regulation system on the compressor, to study the causes of the failure, and to make the gas volume regulation method of the compressor energy saving and reducing consumption widely used. The paper is based on the "Research on key Technologies of High efficiency and Energy-saving Compressor" (No.: 2008BAF34B13), which is the "11th Five-Year Plan". In this paper, the thermodynamic cycle process of compressor and the law of valve movement under the condition of gas flow regulation are studied theoretically and experimentally, and an experimental device is set up to realize the stepless regulation of 0 ~ 100% full range gas flow. The mechanical motion model of piston and crankshaft is established, and the mechanical dynamic performance of compressor under the condition of air flow regulation is comprehensively analyzed, and the hydraulic system is analyzed by combining experimental measurement with computer simulation. It provides a theoretical basis for eliminating the compressor malfunction caused by the abnormal hydraulic system. The main contents of this paper are as follows: 1. In this paper, the thermodynamic cycle model of compressor under the condition of stepless air flow regulation is studied, and the variation law of exhaust volume and inlet valve top opening angle is calculated theoretically. The experimental results of the laboratory compressor show that the calculated results are in good agreement with the measurement. 2. In this paper, the stepless gas regulation system in laboratory and the related signal testing and control system are developed, which provide the experimental basis for the monitoring of the running state and the analysis of common faults of the stepless air flow regulation system. In this paper, the model of compressor gas flow regulation is established, and the variation of compressor mechanical performance caused by stepless gas regulation system is analyzed in detail, and the typical faults that may be caused and their solutions are also discussed. 4. Through experimental measurement and theoretical analysis, the common faults of hydraulic system, a key device in stepless air flow regulation system, are comprehensively analyzed, and the corresponding solutions are given. The results provide a theoretical basis for the piping arrangement of hydraulic system and the design of hydraulic system.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH457

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