三缸内燃式水动力系统动力特性试验研究

The Study of Dynamic Performance on Three-Cylinder Internal Combustion Water Power System

研究了试验条件下三缸内燃式水动力系统在不同油门和转速组合下的动力性指标。通过多组重复性试验确定试验数据,建立了相应的万有特性曲线并与传统内燃机驱动柱塞泵系统进行了分析比较。结果表明,当曲轴转速为1 500r/min时,系统容积效率降低,导致系统输出流量和有效功率先降低后升高,全工况条件下受油门开度影响不大。系统输出压力随转速变化缓慢,随着油门开度增加系统输出压力明显升高。全工况条件下系统输出压力相对改善18.78%～84.36%,系统输出流量全工况基本保持不变,系统有效热效率相对改善18.78%～84.36%。因此,相比传统内燃机驱动柱塞泵系统,三缸内燃式水动力系统有效动率在全工况条件下提升显著。

This paper studies the dynamic performance of the three-cylinder internal combustion water pow- er system with different combinations of throttle power and speed indicators. The dynamic performance of the system was studied through experiment. The dynamic performance curves were defined and compared with traditional internal combustion engine driving plunger pump. The result shows that the output flow rate of 3-cylinder system is basically consistent, the output pressure increases by 18.78%-84.36%, and effective thermal efficiency increases by 18.78%-84.36%.