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Service Enhancer Tool: Design of a new Service Enhance Tool for Metso refiners
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2013 (English)Independent thesis Basic level (university diploma), 15 credits / 22,5 HE creditsStudent thesis
Abstract [en]

Metso develops (among many other things) refiners. The refiner grinds the wood chips intopulp. The grinding is done by segments that are placed on a rotor inside the refiner hosing.In time this segments wear and needs to be replaced.When changing refiner segments or performing service to the refiner the rotor needs to berotated. To perform the rotating motion today the overhead crane is used. This procedure isboth impractical, dangerous and takes precious time from the overhead crane. Because ofthis Metso wanted to create a new way to rotate the rotor.The aim of this thesis is to create a tool or equipment which can be used to rotate therefiner rotor and can be installed as an upgrade on all Metso refiner models.The proposed design is driven with a 1.1 kW electrical motor and a gearbox with a gear ratioof approximately 1:217. The torque is transferred from the outgoing gearbox shaft to therefiner shaft with the help of gearwheels. To connect the gearbox gearwheel with the refinershaft gearwheel, the gear motor has to be moveable in a radial direction. This is done by themeans of two shafts that glides in four bushings. On the gearbox shaft a gearwheel with 120mm of face width is mounted. The large face width is used to take up the axial movement ofthe refiner shaft.The proposed concept fulfills all of the demands set in the pilot study. The design is goodbecause of the low cost and straight forward design that is easy to build and simple to use.The disadvantage is that the equipment is a bit large and heavy, but as stationary equipmentthis should not be a problem.

Place, publisher, year, edition, pages
2013. , 19 p.
, MA, 1318
Keyword [en]
Paper, Pulp, Refiner, Industry
National Category
Other Mechanical Engineering
URN: urn:nbn:se:umu:diva-79533OAI: diva2:642442
External cooperation
Metso Paper Sweden AB
Educational program
Bachelor of Science Engineering in Mechanical Engineering
Available from: 2013-08-23 Created: 2013-08-21 Last updated: 2013-08-23Bibliographically approved

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ServiceEnhancerTool(1412 kB)255 downloads
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Type fulltextMimetype application/pdf

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