Effect of Vibration Condition on Leakage of Characteristics of Prototype Gasket Using Oil Viscosity-Temperature Relations

Abstract

Gaskets are widely used as static sealing elements in machinery, industry and living area. It is common that seal parts provided resistance between static surfaces to prevent the fluid leakage. Theoretically, fluid leakage is directly proportional to the cube of gap height and inversely proportional to lubricant viscosity. Moreover, the viscosity of fluids, particularly oil, is strongly depended on temperature, as lower temperatures correspond to higher viscosities. Therefore, using the viscosity-temperature relation of oils, a gasket to reduce further leakage is proposed. In other words, the leakage can be decreased as the oil temperature decreases. In this report, a flange-type gasket with a gap is modeled by using two circular plates with central recess. The principle of the viscosity, hydrodynamic lubrication, and property of harmonic vibration are applied to the gap flow. Besides, it can be solved the leakage rate by changing the temperature, gap height and recess pressure. The experiment was conducted under not only steady state but also harmonic vibration conditions. The basic equations include the generalized Reynolds equation and other equations concerning the physical characteristics of oil.