Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rim-Jet - A Mechanical Design for a Shaft-less Propulsor
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Rim-Jet – Mekanisk konstruktion av en axel-lös Propulsor (Swedish)
Abstract [en]

During sea rescue operations it is common for the rescue vessels to operate in water with high number of debris that can get stuck in the propulsor. In particular plastic ropes that can get tangled around the shaft and melt causing a complete stop or damage the motor. Currently rim driven shaft-less thrusters have proven to deal with debris in a better way than conventional motors, but they usually operate only at low speeds. The Swedish Sea Rescue Society along with Rolls-Royce and other partners such as Marna decided to start developing a motor combining the idea of the rim driven thrusters driven by a Permanent magnet motor and a water jet to increase the thrust. In this thesis a conceptual design for this motor is presented, in which bearings and seals have been chosen from standard components as well as the bolts and other components, and all the housing has been designed. In order to design the housing and choose the standard components, three main factors were taken into account: not using extra systems, modularity and being as compact as possible. By focusing on those three requirements different bearing and seals solutions were studied and analyzed to check their viability. Furthermore, in order to verify the design and components chosen, mathematical models through MATLAB and simulations with ANSYS were carried out. Finally the drawings of the non standard components were added including the tolerances defined by the standard components.

Abstract [sv]

Under räddningsuppdrag är det vanligt att räddningsbåtar opererar i vatten med mycket skräp som kan sugas in i propulsorn. Speciellt plastrep kan trassla in sig runt axeln och smälta och orsaka driftstopp eller skada motorn. För närvarande finns periferi-drivna, axellösa propulsorer som har visat sig hantera skräp på ett bättre sätt än konventionella, men de är vanligen bara designade för låga farter. Sjöräddningssällskapet beslutade sig därför tillsammans med Rolls-Royce och andra partners som Marna att börja utveckla en motor som kombinerar en periferidriven propulsor med en vattenjet I detta arbete presenteras en konceptuell design för denna motor, där lager och tätningar såväl som bultar och andra komponenter har valts från standardkomponenter. För att utforma höljet och välja standardkomponenterna beaktades tre huvudfaktorer: att undvika extra system, modularitet och att vara så kompakt som möjligt. Genom att fokusera på dessa tre krav studerades och analyserades olika lager- och tätningslösningar. För att kontollera designen och komponenterna som valts genomfördes dessutom matematiska analyser med hjälp av Matlab och simuleringar med ANSYS. Slutligen togs ritningar av icke-standardkomponenter fram, inklusive toleranser definierade av standardkomponenterna.

Place, publisher, year, edition, pages
2019. , p. 102
Series
TRITA-ITM-EX ; 2019:571
Keywords [en]
Conceptual design, debris, propulsor, rescue operations, verify
Keywords [sv]
Driftsäkerhet, framdrivning, propulsor, räddningsbåt, Sjöräddning
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-259679OAI: oai:DiVA.org:kth-259679DiVA, id: diva2:1352955
External cooperation
Sjöräddningssällskapet
Subject / course
Machine Design
Educational program
Degree of Master
Presentation
2019-08-29, 00:00
Supervisors
Examiners
Available from: 2019-09-20 Created: 2019-09-20 Last updated: 2019-09-20Bibliographically approved

Open Access in DiVA

fulltext(8628 kB)9 downloads
File information
File name FULLTEXT01.pdfFile size 8628 kBChecksum SHA-512
db595c96be851634d08529a90d872081b28a06da958c0d4c4f5024ccfc40b3b8e5eb11f63d682fde4458f0f60c1cf3fd0b7eedd86428cdf06a9c199240916ebc
Type fulltextMimetype application/pdf

By organisation
Machine Design (Div.)
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 9 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 42 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf