Abstract
Measurement system of fluid reaction forces generated on annular pressure seals and bearings was developed, and which was applied active magnetic bearings as shaker and force detector as well as bearing. And from advantages of magnetic bearings, this system can measure exactly restoring force and damping force acting on rotor through fluid film under complete non-contact condition. Moreover, it is possible to measure under high pressure and high rotating speed by it's design specifications.
Leakage velocity through narrow clearance of seal is important for pump's efficiency. And it's necessary for designers of turbo-machine to consider dynamics of fluid film in order to avoid vibration trouble. Cavity tone occurred in pump adopted grooved seals is one of noise phenomena that must clear it's mechanism of occurrence. Therefore, an object of this study is to investigate these properties in order to update the design method for various types of seals.
