【摘要】 作为新型动力,气动发动机的功率和气耗率是影响其运用推广的关键因素.为了准确了解气动发动机的功率和气耗率的变化趋势,利用改造的样机进行了台架试验,得到了速度特性曲线和负荷特性曲线.结果表明在进气压力不变时,随转速升高发动机功率线性下降,气耗率升高,在高转速时气耗率恶化;在转速不变的情况下,随着负荷的增加,发动机气耗率下降,进气压力升高.从结果可知气动发动机的特性不同于传统的内燃机,其最佳工作区间在较低转速、较高负荷的区域,此时,其动力性能和经济性能较好.在其推广运用过程中,要根据此特性对配套的零部件进行改造或重新设计.更多还原

【Abstract】 Two key factors that influencing the application of a new type of power machinery,the compressed-air engine,are its power and gas consumption rate.In order to learn the trend of their speed characteristics and load characteristic curves accurately,many experiments were conducted on a reconstructed prototype engine to obtain the speed characteristics and load characteristics curves.The results showed that at a constant inlet pressure,the engine power decreases linearly with increase of engine speed and that the gas consumption rate decreases at higher engine speed;at a constant engine speed,with increase of engine load,the gas consumption rate decreases and the inlet pressure increases.It can be concluded that the characteristics of compressed-air engine are different from those of a traditional engine.The compressed-air engine performances were best at lower engine speed and higher load,in other words,it has good dynamic and economic performance at this region.In application,the matching accessories should be reconstructed or redesigned according to test conclusion.更多还原