K-1238 ポンプ環状シールから発生する水流音の共鳴機構(J06-4 流体関連の騒音と振動(4))(J06 流体関連の騒音と振動)

概要

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Characteristics of hydrodynamic tone from the annular grooves of seals were experimentally studied by using the test stand for measuring the rotor-dynamics of seals and lubricate bearings with support of the active magnetic bearing. Frequencies of this tone are not proportional to the leak flow velocity and change with step by step. The rotational speed of the shaft does not dominate the tone frequencies. The sound pressure of this tone varies with depend on the leak flow velocity and the velocity which has the maximum sound pressure is a little different with the rotational speed of the shaft rotating speed. These characteristics about the operating conditions would indicate some acoustic resonance in the pump seal and it is estimated that the acoustic reasonance would be excited at the cylindrical water-film in the seal-chink.
一般社団法人日本機械学会の論文
2001-08-22