Analysis of Wear Characteristics of Hydrodynamic Seals During Start- up Using 3D Fractal Characterization and Study of Opening Performance Degradation Mechanism

Abstract

Abstract To investigate the degradation mechanism of the opening performance of hydrodynamic seals during multiple start-ups, a model was proposed to analyze the wear characteristics during the start-up process, and an experimental study was conducted. It has been discovered that the state evolution of the hydrodynamic seal during the single start-up process occurs in five stages. The main factor that influences the deterioration of the initial performance of hydrodynamic seals during multiple start-ups is the decrease in the depth of the root groove. To prevent the deterioration of the initial performance of the hydrodynamic seal, it is essential to minimize processing errors in groove depth and reduce the residence time during the mid-speed and mid-load stages of the starting process.