Research And Development On Air-driving Generator For Air Energy Recuperation Of Pneumatic System

Pneumatic technology is applied widely in every fields of national economy. However the efficiency of pneumatic system is very low. It is an important factor restricting the development of pneumatics. In a normal pneumatic system the compressed air in the exhaust chamber of the cylinder is discharged without recycle. Therefore much energy is wasted and the research on energy saving of exhaust is very important. The normal method is to restore the compressed air with an air tank. However the piston speed characteristics of the cylinder is affected with this method. Moreover the system of energy saving with this method is very complex. So a new method on exhaust energy saving is provided. The research target in this paper is not only to save energy, but also to simplify the system. Therefore some interrelated technical matters are researched through theoretical and experimental method in this paper.A new method on exhaust energy saving is provided through energy converting for the first time. A mini energy conversion device is developed to convert the exhaust energy to electrical energy for recycling. Around the innovative ideal, the overall feature need of energy conversion device is brought forward. Then the gross structure is designed, which is mainly constituted by an air-driving-rotation component and a micro DC generator. The structure of air-driving-rotation component is focused designed, and two types of impulse and radial are provided.In order to research the energy conversion efficiency from compressed air energy to mechanical energy, the mechanical characteristics of the air-driving-rotation component should be studied. So a dynamic mini-torque measurement device is developed. Also the experimental loop for generating characteristics is constituted. Some experiments are done on fundamental performance and generating characteristics. The experimental results indicate that the air-driving generator of impulse type is better than the radial one in starting characteristics, mechanical characteristics and generating characteristics.Before optimizing the structure of air-driving-rotation component, the internal flow in it must be studied, and the influence caused by local features is analyzed. The computer fluid dynamics method is applied in this paper. The internal 3-D flow and output mechanical characteristics of the air-driving-rotation component are simulated. Then the mathematical model is proved through experiments. The experimental results...