Parametric investigation of the steady-state response of a mechanical sealwith two flexibly mounted rotors

A parametric analysis is performed to investigate the steady-state dynamic response of a mechanical seal with two flexibly mounted rotors, The effect of changing various inertia, support, and fluid film properties is examined Short rotors are shown to benefit from gyroscopic aligning moments and to exhibit their maximum steady-state misalignment when one of the shaft speed s is zero. Long rotors experience misaligning gyroscopic moments, but if on ly one of the two rotors is long then aligning moments from the short rotor can be transmitted through the fluid and counteract the detrimental gyrosc opic effect in the long rotor In this case rotors which corotate are shown to have a higher steady-state misalignment than those which counterrotate b ecause of the reduction of the hydrodynamic moments, thus lending to increa sed leakage and a higher probability of face contact.