Chapter 3 Hydraulic Pumps For some hydraulic pumps with certain rotating speed ranges or variable displacement capacity,the format of the general characteristic curves shown in Fig 3-3 are commonly used to reflect all their performances.The abscissa represents the working pressure p of the pump and the ordinate represents the pump's flow rate g,rotating speed n or delivery V.Fig 3-3 also shows the equal efficiency curven and the equal power curve Pri P31>2>n3 92 Flow rate q Input power P Overall efficiency n Fig.3-3 General performance curves of hydraulic pumps 10 Homepage List Upwards Downwards Retumn ExitChapter 3 Hydraulic Pumps 10 For some hydraulic pumps with certain rotating speed ranges or variable displacement capacity, the format of the general characteristic curves shown in Fig. 3-3 are commonly used to reflect all their performances. The abscissa represents the working pressure p of the pump and the ordinate represents the pump’s flow rate q, rotating speed n or delivery V. Fig. 3-3 also shows the equal efficiency curveηv , and the equal power curve Ｐri. Fig. 3-3 General performance curves of hydraulic pumps