附件24.4 lever balancing weight motor shaft counterweight c Figure 3-2 Torque measured by Motor balance method 9.Laboratory report for the experiment of performance of hydraulic pump According to Q=f1 (P).N f2 (p),n =41 (P).n =42 (P)and n =(P),draw characteristic curve with rectangular coordinate paper. serial number 1 2 3 456 Data ab a b a b ababab Content of measurement and calculation 1 Pressure P (kgf/cm 2 2 Changes in volume of output oil△V(1) The time which co responds to△V required 3 Flow rate Q=AV/t"60 (l/min) 4 Output power No (KW) weight G(kgf) Input torque M (kgf"m) 5 Rotational Speed n (rpm) 6 Input power N入(KW) Overall efficiency of hydraulic pump n (% 8 Volumetric efficiency nv (%附件 24.4 13 Figure 3-2 Torque measured by Motor balance method 9. Laboratory report for the experiment of performance of hydraulic pump According to Q = f1 (P), N = f2 (p), η = ψ1 (P), η = ψ2 (P) and η = ψ (P) ,draw characteristic curve with rectangular coordinate paper. 1 serial number 2 3 4 5 6 Data Content of measurement and calculation a b a b a b a b a b a b 1 Pressure P（kgf/cm 2 ） Changes in volume of output oil △ V（1） 2 The time which corresponds to △ V required 3 Flow rate Q=△V/t*60（l/min） 4 Output power N o （KW） weight G（kgf） Input torque M（kgf*m） 5 Rotational Speed n（rpm） 6 Input power N 入 （KW） 7 Overall efficiency of hydraulic pump η （ %） 8 Volumetric efficiency ηv（ %）