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Konstruktion av "log strike"-testrigg för utombordsmotorer
Halmstad University, School of Business, Engineering and Science.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Projektet, som har utförts på uppdrag av Cimco Marine AB i Ängelholm, har haft som huvudmål att ta fram en testrigg för att ”log stirke”-testa utombordsmotorer. Cimco Marine AB har utvecklat en dieseldriven utombordsmotor för främst professionellt bruk. Dieselmotorn som används är en motor från bilindustrin som marinkonverterats och monterats på ett egenutvecklat underhus, där kraften från motorn överförs till propellern via två kuggremmar.

”Log strike” är när en utombordsmotor försedd båt kör över en stock som flyter i vattenytan. När detta händer uppstår en kollision mellan den del av utombordaren som sticker ner i vattnet och stocken. Om detta sker i hög hastighet induceras stora krafter i utombordaren och båten. För att säkerställa att Cimco Marine AB:s utombordsmotor klarar de påfrestningar som detta innebär vill de kunna testa detta i en testrigg. Man kan likna detta test med de krocktester som utförs inom bilindustrin.

Den inledande fasen i projektet var att undersöka tillgänglig information om liknande tester. Det bestämdes sedan att riggen skulle bestå av en vagn som sköts mot utombordarens underhus och att vagnen således motsvarade stocken. Utifrån detta delades konstruktionen upp i olika enheter och varje enhet behandlades var för sig innan de sattes samman till en helhet. Konstruktionsarbetet har följt Fredy Olssons konstruktionsmetoder, princip- och primär konstruktion.

Resultatet av projektet är en konceptkonstruktion på en ”log strike”-testrigg anpassad efter Cimco Marine AB:s krav och önskemål.

Abstract [en]

The goal for this project, carried out with directions from Cimco Marine AB, has been to design a concept construction for a “log strike” testrig for outboard motors. Cimco Marine AB has developed a diesel powered outboard motor mainly for professional use. The diesel engine used is an engine from the automotive industry that has been converted for marine use. The engine is located on a gearbox and underhouse that transfer the power via two belts down to the propeller.

A “log strike” occurs when a boat with an outboard motor runs over a log floating in the surface of the water. When this happens a collision between the part of the outboard motor under the waterline and the log is a fact. To ensure that the outboard motor manufactured by Cimco Marine AB manage the loads a high speed log strike produces, they want a test rig to test this. One can compare this test with the crash tests performed in the vehicle industry.

In the beginning of the project, time was spent on research and information gathering. It was then decided that the rig should consist of a sled that is propelled against the underhouse of the outboard motor. After this, the project was split in smaller units and every unit was considered separately before they were put together again as a whole. The construction project has followed the design method developed by Fredy Olsson.

The end result is a concept design of a “log strike”- test rig, adapted to the requirements set up by Cimco Marine AB. 

Place, publisher, year, edition, pages
2016. , 35 p.
Keyword [sv]
testrigg, krocktest, utombordare, utombordsmotor, test, kollision, log strike, logstrike
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:hh:diva-31161OAI: oai:DiVA.org:hh-31161DiVA: diva2:936941
External cooperation
Cimco Marine AB
Subject / course
Mechanical Engineering
Supervisors
Examiners
Available from: 2016-06-27 Created: 2016-06-14 Last updated: 2016-06-27Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
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  • nn-NB
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  • Other locale
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  • asciidoc
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