Method and a device for controlling the alignment between refining surfaces
US7845583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2006 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Jun 26, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G9/0018
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus controlling the alignment between refining surfaces of opposite refining discs are disclosed which are relatively rotatable and which are incorporated in a refiner for disintegrating and refining lignocellulose-containing material in a refining gap between the refining surfaces. The disclosed method includes positioning at least three sensors at least three measurement positions, measuring the vibrations at each of the measurement positions during refiner operation, and comparing each of the measured vibrations at each of the measurement positions with each other. The apparatus disclosed includes at least three sensors disposed in at least three predetermined measurement positions, each of the sensors comprising a vibration sensor disposed on a refining disc for measuring the vibrations at the measurement positions whereby measuring can take place during operation of the refiner and a comparator for comparing the measurements of the measurement positions to provide a comparison therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.