Aerospace Design, To-5 Electromagnetic Relays

In this thesis,we studied some design method about JRW-210M TO-5 with highly reliable. In the process ,we used CAD and the CAE methods to design relay's structure, and finally,our designe could meet technical parameter of aerospace products.The first chapter briefly described the development of relay at home and abroad,it introduced superior performance and good prospects of the TO-5 electromagnetic relay used in aerospace,and pointed out the research step and innovation spot in the thesis.The second chapter introduced the principle of the TO-5 miniature sealed electromagnetic DC relay,the contact system and the main technique parameter of the electromagnetic system. Then, we provided the formula for calculating the air gap permeance.Traditionally, the structural design of relay relied on the sample survey,calculation of structure size ,and the electromagnetic efficiency of the electromagnetic system which was complex. In order to improve the efficiency and accuracy of the design,we sketched the relay structure with CAD(Computer Aided Design) software SolidWorks depending on technical form factor and some empirical data. For determing the relasonal of structual design,we calculated relay's mechanical relaction curve and the magnetic poremtial according to the formula.At last,we used CAE software ANSYS to simulated relay's electromagnetic system with finite element method,draws up the relay attractive torque characteristic curve to confirm the rationality of relay structural design .The last chapter of the thesis, we introduced the craft technique that could guarantee relay reliability. And we used process control document to guarantee relay stability and the entire process traceability. Through validation test,we confirmed that the relay performance meet design requirements,the quality level achieves the M level in"GJB 65B"。...