229 ポンプ環状シールから生じる卓越水流音の特性(一般 : 機器・プラントの静粛化)

概要

論文の詳細を見る
Hydrodynamic tones are radiated from water pumps in some operating condition and the cause of these tone is generated by the self-excited unsteady flow crossing the annular grooves in pump seals. Characteristics of these 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 wider grooves radiate the lower frequency tones. 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.
一般社団法人日本機械学会の論文
2001-06-05