Multi-stage sleeve type high-pressure-difference control valve sleeve structure and design optimization method

Abstract

The invention discloses a multi-stage sleeve type high-pressure-difference control valve sleeve structure and a design optimization method. The sleeve structure comprises a control valve body and a sleeve component in a valve cover. According to the sleeve structure, the effect of vibration and noise reduction can be fully achieved. The design method of the multi-stage sleeve type high-pressure-difference control valve sleeve comprises the steps that the stage number, the thickness and the gap of the multi-stage sleeve are designed; and a sleeve control valve can achieve specific flow characteristics, including linear, quick-opening and equal-percentage characteristic curves, through the design method of small holes in the multi-stage sleeve. The design method of the stage number and the thickness of the multi-stage sleeve is based on the working condition that the sleeve faces radial external pressure and the axial pressure borne by the sleeve; and the design method of the linear, quick-opening and equal-percentage characteristic curve tapping is based on computational fluid mechanics software and iterative computation thereof. The design is convenient, the cost is saved, the multi-stage porous sleeve can be quickly and accurately obtained, and certain engineering application value is achieved.

Description

technical field [0001] The invention relates to the field of sleeve-type high-pressure differential valves, in particular to a structure and a design optimization method of a throttling sleeve assembly whose working medium is liquid. Background technique [0002] Sleeve control valve has the functions of suppressing cavitation, vibration, and reducing noise, and the adjustment characteristics can be changed by replacing the sleeve assembly. Therefore, it is widely used as a pressure reducing valve, steam regulating valve, high pressure steam trap and other valves. One of the important structural types of control valves. For complex working conditions, single-layer sleeves often have insufficient noise reduction capabilities and cavitation reduction capabilities, so it is often necessary to design multi-layer sleeves. In addition, as one of the important types of control valves, the key to the adjustment of the sleeve control valve lies in the accurate adjustment of the flow...

AI Technical Summary

Problems solved by technology

The multi-layer sleeve of the multi-stage sleeve control valve with high pressure difference is usually subjected to external pressure. However, the deformation and stress of the sleeve under external pressure and internal pressure are different. Under internal pressure, the shell will be plastically deformed. Until the plastic collapse failure occurs; under external pressure, in addition to the damage phenomenon similar to that of the internal pressure shell, there will be buckling phenomena such as flattening or buckling when the external pressure load increases to a certain value , and the buckling phenomenon is one of the common forms of external pressure shell failure

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