Study on the water-lubricated high-speed non-contact mechanical face seal supported by a disc spring

摘要: A type of non-contact mechanical face seal supported by a disc spring with high bending stiffness is proposed for actual working conditions and may be used in high-speed turbopumps large axial loads heavy random vibration. First, the separated speed obtained, which shows that initial contact can transform into when rotational higher than speed. Second, steady-state model to describe performance seal. The includes Reynolds equation, energy lubricant temperature–viscosity relationship moment equilibrium finite-difference method solve model. Third, water as sealed fluid, effects geometric parameters (e.g. stiffness, load, speed) on main (film thickness, maximum pressure, temperature, power loss, leakage) are obtained. results show an increase spring, film thickness temperature change only slightly. With decreases increases. increases such turbopump systems speeds smaller leakage requirements.