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The Design and Series Research of a Constant Flow Rate Control Valve

Author: LinXiongWei
Tutor: ShenXinRong
School: Zhejiang University
Course: Fluid Mechanics
Keywords: Hydraulic imbalance Energy-saving Constant flow control valve Numerical Analysis Experimental study
CLC: TH137.52
Type: Master's thesis
Year: 2010
Downloads: 80
Quote: 0
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Abstract


The innovative design of this article a simple mechanical structure , flow capacity , high precision mechanical self- constant flow control valve model . Papers were selected for the model structure , its structure is similar to the thin - walled holes and concentric rings traffic formula designed core component of the model - spool , and the use of CFD theoretical calculation of two models in different spool the displacement of the flow characteristics of the numerical simulation . Numerical Simulation of the RNG k - epsilon turbulence model and the unstructured grid SIMPLE algorithm . By analyzing the numerical simulation , the paper identified as the theoretical design basis to be able to get higher flow control valve pressure - spool displacement linear characteristic concentric rings formula . Further simulate and analyze the control valve pressure - spool displacement curve , papers continue to improve the the spool design curves , finally got the spool model with high linearity differential pressure - spool displacement curve . To further verify the high-precision performance of the constant flow control valve , the paper designed to improve the constant flow control valve flow pressure difference characteristics test platform . And use the platform to design constant flow control valve model experimental study, the flow of the product model - pressure characteristics curve . Curve results show that the constant flow control valve to achieve high-precision constant flow through the linear spring . The results also confirmed the CFD numerical simulation is feasible and effective method to optimize the design and predictive analysis a constant flow control valve . The theoretical analysis and experimental results of the study also showed that changing the spring rate , constant flow control valve the balanced flow value and working pressure range will be regularly changed , but the flow control accuracy is less affected . Therefore , the engineering practice by changing the spring elastic modulus to meet the needs of different working pressure range and balanced flow value . The paper concludes with a summary 40mm diameter pipeline constant flow control valve design ideas, and verified by CFD will be extended to other caliber, to achieve the design goals of product series .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Hydraulic transmission > Hydraulic components > Hydraulic control valves
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