Research On Optimization Design Of Multi-Purpose Deployer And Research And Development Of Rotary Joint

Nuclear fusion energy is currently globally recognized as the ultimate clean energy that can effectively solve the energy and environmental problems of human society in the future.The Tokamak magnetic confinement nuclear fusion device is currently the most promising future commercial fusion power reactor.The high-energy neutrons generated inside the tokamak device during Deuterium-Tritium reaction,will activate the plasma facing materials of the device and radiate gamma ray.However,the plasma facing components need to be maintained or replaced regularly or irregularly,the environment with gamma ray does not allow maintenance personnel to directly enter the inside of the device to operate,needs to be operated in remote handling way by manipulator.This dissertation takes the main transporter of the ITER Multi-Purpose Deployer system as the research object,and carries out engineering research on that.The preliminary multi-objective optimization design research has been performing which take the low-order natural frequency improvement and self-weight reduction as the optimization goals.The most demanding rotary joint is selected as the research focus considering the force status and complexity of different joints in the multi-joint main transporter.The rotary joint engineering studies such as force analysis under different working conditions,transmission system design,structural design and cable management design were carried out.The compactness of the joint is improved in the case of the load capacity and function unchanged by optimizing the structure,reducing the self-weight and the volume of the joint.The main research contents of this dissertation are as follows:1.Preliminary optimization of the Multi-Purpose Deployer conceptual design;The statics analysis and modal analysis are carried out under the full-load and full-span attitude conditions of the Multi-Purpose Deployer.The optimization design research is carried out with the optimization goal of improving the first-order natural frequency and reducing the self-weight.The preliminary length optimization parameters of the bodies are given which can provide design reference for later engineering design.2.Dynamic simulation and statics simulation under seismic condition of the Multi-Purpose Deployer on the posture that maximum load on the rotary joint;Three operating conditions(daily operating conditions,rescue operating conditions and seismic self-locking operating conditions)of the Multi-Purpose Deployer are clarified.The evaluation determined that the rotary joint4 is the most demanding joint,the two maximum load poses of the Multi-Purpose Deployer based on this rotary joint were clarified.The rigid body dynamics and rigid-flexible coupling dynamics simulation were carried out,the statics simulation under seismic conditions had been done considering the seismic requirements,the mechanical design index of the rotary joint were determined.3.Engineering design of rotary joint;The rotary joint transmission chain engineering design under heavy load condition is proposed base on the conceptual design,the double RV series configuration can ensure that the rotary joint effectively resist earthquake impact.The design of a compensation support mechanism is proposed,which can not only carry the shear force and bending moment but also compensate the errors caused by it,improve the output accuracy.A large-capacity cable chain design is proposed.Compared with the commercial cable chain in the market,in the specific rotation angle this cable chain can accommodate 2-3 times more cables in the same installation space,which can solve the problem of too many cables.4.Rescue system design of rotary joint;The rotary joint rescue system is designed based on the modular concept,which makes full use of the space at the inputside of the joint without interference in cables,simple installation and disassembly,and clarifies the rescue process of the rotary joint.5.Design and analysis of the customized RV reducer key components and rotary joint housing.Design the key components of the third-stage customized RV reducer of the transmission chain and the rotary joint housing.Performing finite element analysis to verify the reliability.The weight reduction design and material selection of the housing are carried out through topology optimization.