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Design of a rotary valve for pressurised steam
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Utveckling av rotationsventil för trycksatt ånga (Swedish)
Abstract [sv]

Denna rapport är gjord på ett examensarbete som var utfört på uppdrag av det svenska företaget Ranotor AB. Syftet var att utveckla en konceptuell lösning för en rotationsventil som skall fungera i en miljö med hög temperatur och högt tryck. Ventilen skall arbeta under höga rotationshastigheter, vilket kräver korta öppettider.Tekniska hjälpmedel såsom SolidWorks, ANSYS och MATLAB användes för att modellera och analysera de konceptuella lösningarna. Slutlösningen valdes från ett flertal olika koncept, varpå detta vidareutvecklades och optimerades. Betydande material och gastätningslösningar identifierades och utvärderades för att hitta den bästa lösningen. Optimering av individuella komponenter och hela anordningen gjordes med avseende på spänning, termisk- och dynamisk analys. De givna specifikationerna uppfylldes och resultaten var tillfredsställande. Resultaten ger en teoretisk bas för vidareutveckling och applicering av en rotationsventil in en miljö med hög temperatur och högt tryck.

Abstract [en]

This Master thesis is a project commissioned by the Swedish company Ranotor AB. The objective of this thesis is to develop a conceptual solution for a rotary valve mechanism that has to work efficiently in a high-temperature and high-pressure environment. The valve is to operate at high rotational speeds which calls for very short opening time.Modern engineering tools namely Solidworks, Ansys and Matlab, were employed for modelling and analysis of the conceptual solution.The best design solution was selected from three developed concepts, and the selected concept was further developed and optimized. Major material candidates and gas-tight sealing solution were identified and evaluated and the optimal material and seal design was chosen. Optimization of the individual components as well as the whole assembly was performed based on stress, thermal and dynamic analysis. The given design specifications and functions were fulfilled and the results were satisfactory. The obtained results provide a theoretical foundation for the development and application of a rotary valve in high-temperature and high-pressure environment.

Place, publisher, year, edition, pages
2016. , 73 p.
Series
, MMK 2016:107 MKN 176
Keyword [en]
rotary valve, uniflow engine, gas-tight sealing, variable cut-off time, high-pressure-high-temperature
Keyword [sv]
roterande ventil, uniflow motor, gastät försegling, rörlig bryttidpunkt, hög-tryck-hög-temperatur
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-192859OAI: oai:DiVA.org:kth-192859DiVA: diva2:972545
External cooperation
Ranotor AB
Supervisors
Examiners
Available from: 2016-09-21 Created: 2016-09-21 Last updated: 2016-09-21Bibliographically approved

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