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| Online Measurement Technology for Disc Clearance of Disc Refiner |
| Received:November 29, 2022 |
| DOI：10.11980/j.issn.0254-508X.2023.06.018 |
| Key Words:disc refiner electric eddy current sensor ultrasonic thickness gauge disc clearance online measurement |
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| Abstract:The research status on the disc clearance measurement of disc refiner at home and abroad， and the improvement method of its online measurement were introduced. The best characteristic curve fitting equation for eddy current sensors on the grinder was further explored， including boundary and variable speed response of tooth discs， response of in-out discs， static and dynamic response performance of tooth discs， and output characteristics. The solution for real-time online disc clearance measurement of disc refiner by eddy current sensor combined with ultrasonic thickness gauge was optimized. The voltage value was stable when the distance between the sensor and disc edge was greater than 2 mm and the outer edge linear speed of the moving disc was greater than 360 m/min； meanwhile， the variation of in-out disc response and static and dynamic output characteristics are consistent in general， with the linear coefficient of the equation of the best characteristic fitting curve greater than 0.99. |
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