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本文从理论分析与试验研究相结合的角度对先导式减压阀的静态、动态,线性与非线性特性进行了较全面的研究。文中在推导出先导式减压阀的静态特性综合方程式的基础上,建立了静特性的理论方程,又在实物试验的基础上建立了先导式减压阀的静特性曲线,并对静特性的理论曲线、试验曲线、静特性及其影响因素做了较全面的分析与研究。文中采用“信号流图”法推导出了整个系统(减压阀)的“开”、“闭”环传递函数,对系统实现了绝对与相对稳定性的理论分析与判定。考虑到先导式减压阀是个较复杂的非线性系统,尤其是其起动过程是一个从不作进入工作的非线性过程,因此采用小偏差线性化的方法来分析研究其动特性就存在一定的局限性,故本文用较大篇幅、从先导式减压阀的微分方程出发,排出其函数图、电子模拟图,以在电子模拟计算机上直接解非线性微分方程的方法,来研究先导式减压阀的动态特性,并找出了阀的多种结构参数的变化对阀的动态特性影响的规律性。文中的理论分析及部分结论对先导式减压阀的合理设计和使用提供了一些理论基础与试验依据,对类似元件的分析与研究也有一定益处.文中最后提出了改善工艺、降低成本的建议。
In this paper, the static, dynamic, linear and nonlinear characteristics of the pilot-operated pressure reducing valve are comprehensively studied from the perspective of theoretical analysis and experimental research. Based on the derivation of the equation of static characteristic of the pilot type pressure reducing valve, a theoretical equation of the static characteristic is established. On the basis of the physical test, the static characteristic curve of the pilot type pressure reducing valve is established, and the static characteristic Theoretical curve, test curve, static characteristics and its influencing factors to make a more comprehensive analysis and research. In this paper, the “open” and “closed” loop transfer function of the whole system (pressure reducing valve) is deduced by the method of “signal flow diagram”, and the theoretical analysis and judgment of absolute and relative stability of the system are realized. Taking into account the pilot-operated pressure reducing valve is a more complex nonlinear system, especially the starting process is a non-linear process from entering the work, so using small deviations linear method to analyze the dynamic characteristics of the study there are some limitations Therefore, in this article, we use the differential equations of the pilot-operated pressure reducing valve to discharge its function diagrams and electronic simulation diagrams to study the direct decompression of nonlinear differential equations directly on the electronic simulation computer The dynamic characteristics of the valve, and to find out the valve structure of a variety of changes in the valve dynamic characteristics of regularity. The theoretical analysis and some conclusions in this paper provide some theoretical basis and experimental basis for the rational design and use of pilot-operated pressure reducing valve, and also have certain benefits for the analysis and research of similar components.Finally, some suggestions to improve the process and reduce the cost are put forward.