Mobile electrical lift for lifting heavy load in fusion reactor
Jian, Cui (2024)
Kandidaatintyö
2024
School of Energy Systems, Konetekniikka
Kaikki oikeudet pidätetään.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2024052032655
https://urn.fi/URN:NBN:fi-fe2024052032655
Tiivistelmä
Nuclear fusion is one way to solve energy shortage problem. DEMO is the abbreviation for the demonstration power plant. Due to the extreme environment inside the DEMO, the maintenance of main parts after shutdown of devices cannot be processed by operators. A remote handling (RH) system has been taken into consideration. The aim of this thesis is to develop a remote handling system for the bio shield of DEMO for remote handling systems to complete their work.
There is this bio-shield which is quite a heavy object (around 120 tons) blocking the process of maintenance. In the fusion reactor, the risk will be high if something is to be lifted and dropped by accident, so the moving platform could be considered here. When the heavy load objects are in position, it should be locked in position, which means preventing its movement in horizontal direction, therefore, the mobile electrical lift should firstly move below the object, then lift the object for 30 mm by a set of hydraulic cylinders. Then the lift slow slide along the linear guide to the destination and drop this heavy object.
The structure and the design principle of the mobile electrical lift is introduced. The lift is modelled by using 3D modelling software. Finite element software is used to test the structure of the lift until the calculated results satisfy the requirements. The result is discussed in the last section as well as some challenge that have been encountered and some improvement that may be expected in future development.
There is this bio-shield which is quite a heavy object (around 120 tons) blocking the process of maintenance. In the fusion reactor, the risk will be high if something is to be lifted and dropped by accident, so the moving platform could be considered here. When the heavy load objects are in position, it should be locked in position, which means preventing its movement in horizontal direction, therefore, the mobile electrical lift should firstly move below the object, then lift the object for 30 mm by a set of hydraulic cylinders. Then the lift slow slide along the linear guide to the destination and drop this heavy object.
The structure and the design principle of the mobile electrical lift is introduced. The lift is modelled by using 3D modelling software. Finite element software is used to test the structure of the lift until the calculated results satisfy the requirements. The result is discussed in the last section as well as some challenge that have been encountered and some improvement that may be expected in future development.