中文摘要：

为了改善原有气动发动机的缺陷，提出了一种新型的气动发动机单螺杆膨胀机，其具有容积效率高、结构控制简单、噪声低、寿命长等特点。为了测试单螺杆膨胀机的各项性能，建立了单螺杆膨胀机压缩空气动力系统，对膨胀机在不同进气压力下进行了实验研究。实验结果表明：随着进气压力升高膨胀机输出功率及总效率升高，而气耗率下降，即膨胀机在高进气压力下具有较好的动力性能、经济性能和较高的总效率。

英文摘要：

In older to overcome the disadvantage a new air powered engine single screw expander, of the existing air powered engine, we proposed it has many advantages, such as high volumetric efficiency, simple configuration, low noise and long working life, etc. In order to test the performance of single screw expander, we have established a compressed air powered system based on single screw expander, the experiments were conducted for different intake pressure. Results indicate that the output power and total efficiency increase as the intake pressure increases, and gas consumption ratio decreases, namely good dynamic performance, good economic performance and higher total efficiency can be obtained at high intake pressure.