Simulation And Optimum Design To The Multi-orifice Hydraulic Buffer

As safeguard for preventing rigid crash while moving, buffer is applied to a wide range of fields such as lifting equipment, metallurgy, port machinery, rail truck etc. Since operator safety, maintenance and machine lifetime depend on its performance directly, buffer plays important roles in industry production.The multi-pore hydraulic buffer which is one type of cushioning products is studied in this paper. It takes effect by some pores on the wall of pressure chamber which arranged according to special rules. Cramped structure, high power-absorbing ability, and lower rebound force are the main advantages. However, it mostly relies on experience currently when designing hydraulic buffer. Damped orifices are often arranged simply on equant and equidistant. So it's difficult to acquire the best cushioning effect.To solve this problem, some researches on multi-orifice hydraulic buffer are finished here. First of all, a mathematical model of cushioning process based on LQH-HYD hydraulic buffer is established. After being transformed into simulation model by MATLAB and solved in computer, several important simulation curves are created. Then according to the simulation result, influence of some parameters to the cushioning performance is discussed. To optimize orifice, the most important factor for cushioning, an optimized method called PSO arithmetic is adopted. With the diameter and the spacing interval of orifice as design variables, error between actual value and ideal value as object function, a series of proper data is attained after iterated many times. Better cushioning effect is achieved finally.Particle Swarm Optimizer (PSO) is applied here for optimization. Compared to classical methods, it is a new method in engineering field with less application. Nevertheless, it has better performance when avoiding trapping in local optimum. A satisfying result is obtained.In the end, based on VB-and-MATLAB, orifice-optimizing software with friendly user-interface is developed by mixed- programming method. Several specific cases are provided to verify the method and the software mentioned above.