Screw Pneumatic Level Of Optimization Of The Balancing Machine Design

The thesis deals with the elevating mechanism and equilibrating mechanism of a large-caliber ultra lightweight howitzer.An elevating and equilibrating mechanism which possesses the function of both screw and nut elevating-equilibrium and pressure balancer mechanism was put forward. Modern design theory and method was used to deeply research on the design method of the elevating and equilibrating mechanism.The capability of the screw gas pressure elevating and equilibrating mechanism was affected by the factors such as the temperature, and sealing. The above factors were researched and a better project was put forward. A design method of elevating and equilibrating mechanism based on the optimization algorithm was put forward to optimize the maximum imbalance moment of rising and falling part of the howitzer due to the fact that the mass of the rising and falling part of the light towed howitzer was very big and the center of mass kept to the front, the force to handle the handwheel was too big according to the traditional design method. The maximum unbalanced moment was built as the objective function of optimization model, MIGA algorithm was used to achieve the maximum unbalanced moment of the rising and falling part of the light towed howitzer. The method was capable of improving the calculation efficiency and decreasing the mass, and provided a current design method to elevating and equilibrating mechanism of light towed howitzer and some similar components.The optimization model of the elevating and equilibrating mechanism was built. Latin hypercubes design experiment was used to do sensitiveness analysis in order to filter design variables and adjust design space. The appropriate parameter of MIGA was set to improve the optimization efficiency and capability of to search the results. At last, the result of this thesis was compared with result of the traditional design method, the correctness and practicability of this method was approved.The parameters were chosen according to the result of the optimization, a mathematic simulation was built to analyse the elevating and equilibrating mechanism's characstratic. The curve of the elevating and equilibrating mechanism's balance moment range from the high firing angle to the low firing angle was achieved. FEM model of 0 degree heading angle,-3 degrees height angle and 0 degree heading angle,65 degrees height angle was built to check the stiffness, intensity and stability, the lightweight improvement was based on the FEM model. The results the research showed that a structure of fine quality and lower weight was achieved and the stiffness, intensity and stability also fulfilled request.