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在液压系统中,减压阀必须具有足够的稳定性及良好的动态品质。由于双级减压阀内部流动及受力情况比较复杂,而阀的起动过程又是阀从不工作到工作的一个非线性过程,因此采用小偏差线性化法来分析其动特性(尤其是起动特性)就存在一定的局限性。本文以J-25B型减压阀为例,根据微分方程排出非线性模拟图,通过在模拟计算机上直接求解非线性微分方程组来研究减压阀的起动特性及在阶跃信号作用下的干扰特性,并与实物试验进行比较。文中探讨了阀的结构参数对上述特性的影响,提出了简化工艺、降低成本的建议。
In the hydraulic system, the pressure relief valve must have sufficient stability and good dynamic quality. Due to the complexity of the internal flow and stress in the two-stage pressure reducing valve and the starting process of the valve, which is also a non-linear process from the non-working to the working of the valve, the small deviation linearization method is used to analyze its dynamic characteristics Characteristics) there are some limitations. In this paper, J-25B-type pressure reducing valve, for example, according to the differential equation to discharge the nonlinear simulation diagram, by directly solving the system of nonlinear differential equations on the simulation computer to study the relief valve starting characteristics and the step-signal interference Characteristics, and compared with the physical test. In this paper, the valve structural parameters on the above characteristics of impact, proposed to simplify the process, reduce costs.