Contact status between seal ring and its support: crucial factor in hydrostatic mechanical face seal

Abstract

Purpose This paper aims to investigate the influence of the contact status between the seal ring and its support on the seal performance in hydrostatic mechanical face seal. Design/methodology/approach A thermal fluid-solid interaction (TFSI) model of hydrostatic mechanical face seal is further developed, in which the multi-body contacts between components are particularly given more attention. The numerical models of the flow field and complete seal assemblies are developed. A specific energy equation is obtained to simplify the calculation of film temperature. Based on the mechanism for the continuity condition of the physical quantities at the fluid–solid interface, the TFSI model uses an on-line iterative coupling method. Findings The contact status between seal ring and its support affects the seal performance significantly. The rotating ring and the stationary ring contribute differently because of the contact status difference. Originality/value The contact status between the seal ring and the ring seat is key to gain an insight into the performance of the hydrostatic mechanical face seal thus provides guidance for mechanical seal design.

Reliability Evaluation of a Dynamic-Pressure Mechanical Seal Based on Liquid Film Vaporization Phase Transition

“…Therefore, in this study, the Lee model was selected to characterize the phase transition process in the computational fluid dynamics analysis. Equation (1) shows the evaporation term of the mass transfer equation, while the condensation term is shown in Equation (2).…”

“…Thus, a large number of investigations have been presented in the literature aiming to improve the reliability of mechanical seals. He et al [1] analyzed the reliability of mechanical seals used in coal mine mechanical equipment, taking into account the sealing principle, part design and precision control, end-face friction and wear, and lubrication. Ojile et al [2] studied the failure causes of mechanical seals by using Weibull and Weibyes technologies, and the feasibility of this method in the reliability analysis of mechanical seals was verified.…”