Authors: S.A. Zaydes, A.N. Mashukov

Title of the article: Application of diamond smoothing technology to improve the microgeometry of the valves of the high pressure armature

Year: 2019, Issue: 1, Pages: 5-13

Branch of knowledge: TECHNOLOGY AND EQUIPMENT OF MECHANICAL AND PHYSICAL-TECHNICAL PROCESSING

Index UDK: 621.646/67.017

DOI: 10.26730/1999-4125-2019-1-5-13

Abstract: The main link ensuring uninterrupted and safe operation of high-pressure piping systems is shut-off and control valves. The high-pressure shut-off valve is a complex system of parts, which reliably protects the pipelines from leakage of toxic and fire and explosion hazardous media. The reliability and duration of HP pipeline operation depends on the quality of the surface finish of its valve assemblies. The contact surfaces of the compo-nents of the high pressure valve assembly of the rod and nozzle are the most critical parts of it, the most susceptible to wear and also to the corrosive and thermal effects of the processing medium. The force generated on the rod to ensure the tightness and, as a result, the efficiency of the valves depends on the value of surface roughness of these parts of the valve. To improve the microgeometry of the high-pressure nozzle, there are various methods of surface plastic deformation, as well as methods using thermal effects on the metal, such as surfacing, powder sintering, and others. These methods have a number of disadvantages that do not allow their effective use for the manufacture of the critical parts of high-pressure valves. The study selected a promising method for improving the surface of high pressure nozzles for this area - a diamond smoothing method. The article examines the effect of diamond smoothing on the change in surface roughness of the valve assemblies of high pressure fittings. The most optimal modes for carrying out diamond smoothing were selected. The results obtained in the course of research allow us to recommend this method as a replacement for the final finishing of high-pressure pipeline valve assemblies.

Key words: diamond smoothing high pressure valves valve assemblies hardening roughness surface mi-crogeometry tightness

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