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Measuring Tangential Forces in a Pulp Refiner: A Novel Approach
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap. (High yield pulping technology)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (High yield pulping technology)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (High yield pulping technology)
2016 (engelsk)Inngår i: Experimental techniques (Westport, Conn.), ISSN 0732-8818, E-ISSN 1747-1567, Vol. 40, nr 2, s. 789-793Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

To get some insight into the processes that are active during the refining of wood, the tangential force distribution in the plate gap is of interest. Over the years several designs of force sensors have been developed for this purpose. One drawback with these designs is that each sensormeasures forces over quite a small area such that in order to cover the whole disc with a reasonably good resolution, many sensors have to be used. Also, there are problems to protect the active parts of the sensors from the harsh environment in the plate gap. In this paper a different concept is presented, in that the sensor is continuous and consists of a hollow radial bar equipped with strain gages on the inside. The force sensor was calibrated before mounting by loading it with a known load in the tangential direction and in different positions while measuring the strains in the points where the gages are located. This makes it possible to determine the so-called influence (or Green) functions. Knowing these it is possible to determine the tangential force distribution from strain values measured during operation of the refiner. Guidelines for doing this are presented together with a detailed description of the load sensor and some experimental results.

sted, utgiver, år, opplag, sider
2016. Vol. 40, nr 2, s. 789-793
Emneord [en]
Pulp Refining, Plate Gap, Force Sensor, Refiner Disc, Strain Gages
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Identifikatorer
URN: urn:nbn:se:miun:diva-23849DOI: 10.1007/s40799-016-0079-8ISI: 000384752900031Scopus ID: 2-s2.0-84969722092OAI: oai:DiVA.org:miun-23849DiVA, id: diva2:772465
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Filling the gap
Forskningsfinansiär
Swedish Energy AgencyVINNOVATilgjengelig fra: 2014-12-17 Laget: 2014-12-17 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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Gradin, PerBerg, Jan-ErikNyström, Staffan

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