Design And Numerical Simulation Of Axial Flow Labyrinth Piston Gas Regulator

In the mechanism of gas system, the proper transportation and usage of natural gas highly rely on pressure regulator which actually acts as vital parts of urban gas application. Nevertheless, most of pressure researches and cases indicates it that the priority has been given to the generic domestically. Such repeating processing and prototype tests requires longer R&D cycle and more investment. It has severely impeded the technology development of this industry. The related researches lags behind at the theoretical analysis and test stages. Such situations are particularly more evident in cases of high pressure difference regulating valve under the condition of internal compressible flow in which aspect a great more detailed researches are in urgent need for reference and other purposes.In consideration of the poor performance of the current direct force type pressure regulator under the high pressure strong flow rate, this paper attempts to redesign the current direct type pressure regulator to acquire a axial labyrinth piston gas regulator that is capable of working under conditions of high pressure and strong flow.By reference from Bernoulli Equation, theoretical derivation indicates the practicality of the improvement to the pressure regulator labyrinth disc under the condition of compressible gas medium. The deviation works consists of the finalization of labyrinth disc series of turning, the number of labyrinth flow channel, and the number of labyrinth disc, and reference documents studies, confirm the size of the entrance labyrinth disc according to reference document and etc. the decompression structure of labyrinth disc and the decompression structure of piston valve core is completed in accordance of the initial circumstances. This paper offers two options which can be further analyzed to tell which one of them can better be applied to the actual conditions for the integral design of the pressure regulator.Three-dimensional modeling software Pro/E is adopted for the 3D model building of the designed pressure regulator. In addition simplification to the model is made for easier import to the finite element analysis software ANSYS CFX for the flow field simulation. The analysis of finite element aims to testify whether the improved pressure regulator meets the design requirement. The finite element simulation results shows that, the redesign of pressure regulator has not only meet the requirements fundamentally, but also used different numbers of plates for various simulations. While the deficiency is evident on the structure, to which further improvement is needed. As to the labyrinth disc flow channel and corresponding export, the necessary adjustments have been made. Besides, One take the back-end pressure signal pipe has been added and the springs has been optimized for stable pressure at the rear part.