Rotor life estimation device and vacuum pump
AssigneeShimadzu Corporation
InventorJunichiro Kozaki
Life of this patent
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Abstract
A rotor life estimation device of a vacuum pump including a rotor rotatably driven by a motor and a rotor temperature detection section configured to detect a temperature of the rotor, comprises: an arithmetic section configured to calculate a strain equivalent corresponding to creep strain of the rotor based on a correlation between a creep strain speed equivalent and the temperature of the rotor and the temperature detected by the rotor temperature detection section; an estimation section configured to estimate a rotor life based on the calculated strain equivalent; and a providing section configured to provide information on the estimated rotor life.
Claims11
A vacuum pump comprising:
- a rotor rotatably driven by a motor;
- a sensor configured to detect a temperature of the rotor;
- and
- a rotor life estimation device comprising:
- a timer;
- a processor configured to:
- store data indicating a correlation between the temperature of the rotor and an inverse value of the rotor life time in a storage;
- receive from the sensor a detected temperature of the rotor;
- receive from the timer time information indicating when the received temperature of the rotor is detected by the sensor;
- acquire the inverse value of the rotor life time corresponding to the received rotor temperature from the correlation;
- calculate a strain integrated value corresponding to the time integral of the inverse value of the rotor life time;
- estimate a rotor life based on the calculated strain integrated value;
- and
- output information on the estimated rotor life.
Dependencies are inferred from the claim text.