Dynamic Analysis Theory Modeling of Spring Operating Mechanism In order to deeply analyze the dynamic characteristics of the spring operating mechanism, the dynamic model of the spring operating mechanism can be established by using the theory of multi-rigid dynamics. The dynamics of the closing process is taken as an example. Introduction to the structure and working principle of the spring operating mechanism The following research is a spring operating mechanism used in the self-operating high-pressure sulphur hexafluoride circuit breaker. The mechanism adopts a splint structure and has a compact structure, and the whole mechanism is self-contained. The remaining energy at the end of the opening movement is absorbed by the opening buffer 15, which simultaneously acts as the most endless movement, and the opening process is completed.
Principle of spring operating mechanism Multi-body dynamics theory foundation Multi-body system dynamics is a new branch of mechanics developed on the basis of classical rigid body dynamics laid by Euler and Lagrange. It includes multi-rigid system dynamics and multi-flexible system dynamics. It is the science of studying the motion laws of multi-body systems composed of several rigid and soft bodies connected to each other.
Simulation analysis and simulation results analysis Before the simulation analysis, the ADAMS/View prototype model self-test tool is used for self-test, then ADAMS/Solver is called to perform dynamics, kinematics and static analysis to obtain the system simulation results, and post-processing is performed to obtain the simulation. The analysis curve is the curve of bearing force, speed and spring tension in the closing process, which is the curve of cam force variation during the closing process. It can be seen from the above simulation results that the closing and opening speed of the whole operating mechanism is very fast, and the closing process is completed within 50ms. The motion state at any time can be clearly observed through ADAMS simulation, and the components are obtained. Sports characteristics.
The results of ADAMS simulation analysis show that the whole cam is subjected to a very large external force during the closing process (about 40000N), and there is a large fluctuation in the force amplitude during the whole process, which will have more fatigue resistance to the cam mechanism. High requirements. Under its direct influence, the bearing supporting the entire energy storage shaft is also stressed (about 35000N), and the entire closing process also has a very large fluctuation in the bearing force, which will lead to a decrease in bearing life. The simulation analysis of the opening process is the same, and the same conclusion is obtained. Therefore, by adjusting the lift curve, spring stiffness and damper damping of the cam, the force amplitude of the cam and the bearing during the closing process is reduced, and the bearing is increased. And the service life of the entire operating mechanism.
This search is performed in the real number domain, and does not need to be performed in the complex domain, so the method is simple and easy to apply. The approximate synthesis of the planar four-bar mechanism function mechanism illustrates the effectiveness and practicability of the method. The above method can also be used to accurately synthesize the mechanism.
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