Page 6 - Parker - hydraulic motors M5AS/M5ASF

Catalogue HY29-0024/UK Hydraulic Motors, Fixed
Motor Selection M5AS/M5ASF, Denison Vane Motors

Motor performances required 1. Check if available power is greater than required power (0.85 estimated overall efficiency).
Torque ....................... T [Nm.] 55
Speed ....................... n [rpm] 1500
30 x 250
Q x p
Pump available data 0,85 x > T x p x n 0.85 x > 55 x p x 1500
Flow .......................... Q [l/min] 30 600 30 x 1000 600 30 x 1000
D Pressure ................ D p [bar] 250 10,6 > 8,7 kW
2. Two ways of calculation : Calculate V from T required torque, or from Q available flow.
i

2a. 2b.
20 x p x T 20 x p x 55 1000 x Q 1000 x 30
V = = = 13,8 cm /rev V = = = 20,0 cm /rev
3
3
i p 250 i n 1500
3a. Choose motor from Vi immediately greater 3b. Choose motor from Vi immediately smaller
3
M5AS* 016 : V = 16,0 cm /rev M5AS* 018 : V = 18,0 cm /rev
3
i i
4a. Check theoretical motor pressure 4b. Check theoretical motor pressure with
T = 55 Nm
20 x p x 55
20 x p x 55
20 x p x T
20 x p x T
D p = = = 216 bar D p = = = 192 bar
V i 16,0 V i 18,0
Torque loss at this pressure = 3,0 Nm Torque loss at this pressure = 3,3 Nm
(See page 9) (See page 9)
Calculate real pressure Calculate real pressure
20 x p x (T + Tl) 20 x p x 58 20 x p x (T + Tl) 20 x p x 58,3
D p = = = 228 bar D p = = = 204 bar
eff. V i 16,0 eff. V i 18,0
5a. Flow loss at this pressure : 3,5 l/min 5b. Flow loss at this pressure : 4 l/min
(See page 9) (See page 9)
Real flow used by the motor : Real flow used by the motor :
Q = 30 - 3,5 = 26,5 l/min Q = 30 - 4 = 26,0 l/min
eff. eff.
6a. Real speed of the motor : 6b. Real speed of the motor:
Q x 1000 26,5 x 1000 Q x 1000 26,0 x 1000
n = = = 1656 rpm n = = = 1444 rpm
eff.
eff.
eff. V i 16,0 eff. V i. 18,0
Real performances Real performances
V = 16,0 cm /rev V = 18,0 cm /rev
3
3
i
i
n = 1656 rpm n = 1444 rpm
eff.
eff.
T = 55 Nm. M = 55 Nm.
D p = 228 bar D p = 204 bar
eff. eff.
FlUID POWer FOrMUlaS
1
Volumetric efficiency total leakage x 1000 Speed [rpm]
1 +
3
speed x displacement Displacement [cm /rev]
Pressure [bar]
Flow rate [l/min]
Mechanical efficiency torque loss x 20 x p Leakage [l/min]
1 -
D pressure x displacement Torque [Nm]
Torque loss [Nm]
Fluid motor speed rpm 1000 x flow rate x volumetric eff.
displacement
Fluid motor torque N.m D pressure x displacement x mech. eff.
20 x p

Fluid motor power kW speed x displacement x D pressure x overall eff. or torque x speed x 20 x p
600 000 600 000

6 Parker Hannifin SAS
VPDE, Denison Vane Motors
Vierzon - France