Title: Belt driven centrifugal separator with multi-stage, belt deterioration alerting display
Application Number: 200610163927 Application Date: 2006.10.08
Publication Number: 1943873 Publication Date: 2007.04.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B04B13/00;B04B9/10;B04B9/02;B04B9/08;G08B5/00
Applicant(s) Name: Hitachi Koki K. K. Address:
Inventor(s) Name: Fujimaki Takahiro;Takahashi Hiroyuki
Attorney & Agent: wangxin hua
Abstract:
    In a centrifugal separator of the type in which driving power of a motor is transmitted to a rotor via a power transmission mechanism, such as a belt, a motor-rotation signal frequency fm and a rotor-rotation signal frequency fr are computed, on the basis of which a frequency ratio A (fr/fm) is computed. When the frequency ratio A exceeds the upper limit of a first predetermined range, a warning message is displayed to prompt the user to perform maintenance. When the frequency ratio A exceeds the upper limit of a second predetermined range, an alarm message is displayed and the motor is stopped.
Time: 10
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