Belt driven centrifugal separator with multi-stage, belt deterioration alerting display
AssigneeHitachi Koki Co., Ltd.
InventorsTakahiro Fujimaki, Hiroyuki Takahashi
Life of this patent
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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.
Claims14
A centrifugal separator comprising:
- a motor that has a driving shaft and generates driving power;
- a rotor that is configured to accommodate a sample subject to centrifuge;
- a rotational shaft that supports the rotor to be rotatable therewith;
- a driving power transmission mechanism that is coupled between the driving shaft and the rotational shaft and transmits the driving power of the motor to the rotational shaft on which the rotor is supported;
- a monitoring unit that monitors an operating status of the driving power transmission mechanism and outputs a status signal indicative of the operating status of the driving power transmission mechanism;
- a motor control unit that controls the motor;
- and
- a multi-stage alerting unit that alerts a user that the driving power transmission mechanism is one of a predetermined number of different stage malfunction statuses based on the status signal output from the monitoring unit.
Dependencies are inferred from the claim text.