Experimental Study of Dynamical Charateristics of a Long Annular Seal (In the Case of Concentric Rotor and Outer Cylinder)

概要

論文の詳細を見る
This paper describes an experimental study of the dynamic fluid reaction force which is generated in the axially long annular clearance between the rotor and stator of a submerged motor pump or in the balance piston of a turbo pump where fluid flows axially. For measuring the dynamic fluid force, a test rig was made to demonstrate the spin and whirl motion of the rotor. In the test, the rotor and the stator were set in the concentric condition and the pressure fluctuation, fluid reaction force and flow rate were measured under the basic parameters of rotational speeds and pressure drop across the long seal. The tangential force component was obtained from the dynamic fluid force and the instability threshold (limit) was determined. In addition, the dynamic fluid force was expressed in terms of the stiffness coefficient, damping coefficient and added mass; each coefficient is discussed in detail in this paper.
一般社団法人日本機械学会の論文
1989-05-15