基于动网格技术的压力调节器弹簧参数快速设计方法

A rapid method for determining the parameters of the spring within the pressure regulator in irrigation system using adaptive meshing technology

【目的】提出一种高效的压力调节器弹簧参数快速设计方法,加快相关设备的研发速度和设计精度。【方法】该文基于动网格技术,以一种移动部件为“杯”式结构的压力调节器为例,根据力的平衡原理和胡克定律,构建了弹簧参数求解模型。通过3D打印试样进行水力性能实测,验证了弹簧参数设计结果的可靠性和精准程度【结果】在所建立模型的基础上,提出了弹簧参数快速设计方法,该方法的预置压力设计绝对误差RE小于2%;得到了预置压力设计值0.10 MPa条件下,压力调节器主要结构参数对配置弹簧参数的影响规律并构建了弹簧参数回归模型。【结论】对于某一固定结构的压力调节器,其预置压力随配置弹簧紧力的增大而线性增大。预置压力确定时,弹簧预紧力与移动部件上游受压面面积和调压断面高度线性负相关,与移动部件下游受压面面积线性正相关。在预置压力规格、调压稳定性、调压范围和适用流量均满足设计要求的前提下,压力调节器结构参数对弹簧预紧力的交互影响不显著,但对弹簧刚度和弹簧压缩长度存在显著的交互影响,因此导致了传统压力调节器设计中,优化某一性能指标而导致其他性能指标劣化的问题。

【Background and Objective】Pressure regulators(PR)are an indispensable component in irrigation systems,particularly in large-scale hilly terrain,ensuring precise water distribution and system efficiency.The performance of PRs heavily relies on the parameters of their internal springs,yet their design requires refinement.This paper aims to propose an efficient and accurate method for rapid design of the pressure regulator springs.【Method】The method was based on CFD by using an adaptive mesh technology to construct a model for solving for the spring parameters.We developed a model to determine the spring parameters,by using the PR with a cup-shaped moving part as the case study.We established a comprehensive spring parameter design process and devised a rapid design method based on the force balance principles and Hooke's law.In the numerical model,the outlet pressure was meticulously set to meet specific preset pressure specifications,ensuring design precision.Various inlet boundaries were designed to control the regulating range and ensure stable pressure regulation.Additionally,convergence conditions were established to guarantee that applicable flow rates met design requirements.By configuring appropriate boundary and convergence conditions,our method facilitates efficient spring parameter configuration and achieves multi-objective optimization.【Result】①The absolute error of the design outcomes was less than 2%.②For a fixed-structure PR,the preload of the configured spring exhibited a positive correlation with the design preset pressure value.However,the relationship between spring stiffness and precompression length with the preset design pressure value was more complicated.When the design PR preset pressure was determined,the preload force of the spring was inversely linearly correlated to the pressure-adjusting cross-sectional height and the water pressure area upstream of the moving part,and was linearly correlated to the water pressure area downstream of the moving part.The interaction effect of PR structural parameters on spring preload force was not significant,but there was a notable interaction effect on spring stiffness and compression length.【Conclusion】The proposed method can circumvent the issues associated with the traditional pressure regulator design and can thus be used as an improved method for PR spring design.