Semi Salix Leaf Textured Gas Mechanical Face Seal with Enhanced Opening Performance.

Linqing Bai,Pengcheng Zhang,Zulfiqar Ahmad Khan

doi:10.3390/ma14247522

Abstract

Seal performance of a novel gas mechanical face seal with semi salix leaf textures was introduced and theoretically investigated with the purpose of enhancing hydrostatic and hydrodynamic opening performance. First, a theoretical model of a laser surface textured gas mechanical face seal with semi salix leaf textures was developed. Second, the impact of operating and texturing parameters on open force, leakage, and friction torque was numerically investigated and has been discussed based on gas lubrication theory. Numerical results demonstrate that the semi salix leaf textured gas face seal has larger hydrostatic and hydrodynamic effects than the semi ellipse textured seal because of the effect of the inlet groove. All semi salix leaf textured surfaces had better open performance than the semi ellipse textured surface, which means that the inlet groove plays an important role in improving open performance and consequently decreasing contact friction during the start-up stage. Texturing parameters also influenced the seal performance of thee semi salix leaf textured gas face seal. When the inclination angle was 50°, the radial proportion of the inlet groove was 0.8, the dimple number was 9, and the open force resulted in the maximum value. This research has demonstrated the positive effects of the applications of a semi salix leaf textured gas mechanical face seal that combines the excellent hydrostatic and hydrodynamic effects of groove texture and the excellent wear resistance of microporous textures.

Highlights

A dry gas face seal is a kind of non-contact mechanical seal, which obtains a sealing effect by a gas sealing gas or gas sealing liquid [1]
Micro-pored structure and the distribution of laser surface texturing in a seal ring play an important role in terms of mechanical face seal performance, especially the open force, friction torque, and leakage, which significantly influence the seal performance
A novel elliptical dimple gas seal with an inlet groove, which has been named as a semi salix leaf textured gas mechanical face seal, was introduced and theoretically studied in this research

Summary

Introduction

A dry gas face seal is a kind of non-contact mechanical seal, which obtains a sealing effect by a gas sealing gas or gas sealing liquid [1]. Micro-pored structure and the distribution of laser surface texturing in a seal ring play an important role in terms of mechanical face seal performance, especially the open force, friction torque, and leakage, which significantly influence the seal performance. A novel elliptical dimple gas seal with an inlet groove, which has been named as a semi salix leaf textured gas mechanical face seal, was introduced and theoretically studied in this research. This research provided a valuable parametric design method applied to the semi salix leaf texture gas mechanical face seal with enhanced opening performance, which will decrease the risk of contact and wear during start-up as much as possible. To analyze seal performance of semi salix leaf textured gas mechanical face seal, theoretical analysis was conducted in this research. The periodic boundary conditions for each unit can be described as follows

Parameters of Seal Performance

Findings

Calculation Method