Research On Characteristics Of Hydro-pneumatic Buffer With Throttle Shaft

As a kind of important safety device for heavy-duty machinery equipments, buffer is widely used in many engineering fields, such as transportation and construction. The process of social modernization accelerates the development of machinery equipments to the direction of high effect and high standard. Buffers with heavy load and high-powered are deadly needed. As the current used buffers can not meet the market requirements, it’s extremely urgent and necessary to develop a new type of buffer.The paper introduces the operating principles and the structure characteristics of the new hydro-pneumatic buffer. It describes its operating and performance characteristics. Numerical simulation method is used in the performance analysis of the buffer. The numerical analysis and simulation model are established based on the Computational Fluid Dynamics (CFD). With the fluid simulation software FLUENT, a series of key technologies of the numerical model, such as grid division, boundary conditions setting and material properties are studied in depth. By contrastive analysis with other experiment data, the data from the static and dynamic process of the analogue stimulation buffer verifies the correctness of the model. And the curve graph representing the relationship of the buffering power and cushioning stroke can show the characteristics of the design.The simulation curve shows that the new-style buffer has slight rebound force and huge power-absorption. It’s a high efficient safety device for machinery equipments. The paper uses simulation model to change the structure of the throttle shaft, and analyzes the influence of the buffer’s cushion performance. It provides important reference data to the designers for optimization designing of the product.