6 Mounting Electrically connecting the pump
© 2007 Moog GmbH User Manual RKP-II (CA53461-001; Version 1.0, 10/07) 37
6.5 Electrically connecting the pump
Electrically connecting the
pump
6.6 Arranging Multiple Pumps
6.6.1 Determining the through drive torque
Arranging Multiple
Pumps, Determining the
through drive torque
Additional pump stages can be mounted axially to the pump and as a result, all
pumps can be driven by the same shaft. Available for multiple mounting
purposes are radial piston pumps (the maximum size to be selected should be
equal to pump stage 1) or other pumps with adapter flanges for SAE-A or
SAE-B. For the maximum permissible through drive torque of the added
pumps, see the table below. Ö Tab. 7, Page 37
Through Drive Torque for Added RKP, SAE-A- or SAE-B Adapters
The required through drive torque to drive the added on pumps should be
determined by using the following variables:
Through Drive Torque of Pump Stage 1 to 2:
Formula for Through Drive
Torque for Multiple Pumps
Example:
Based on a pump combination
RKP 63 + RKP 63 + RKP 32 + AZP 16
280 bar, 210 bar, 150 bar, 50 bar
this would mean:
The pump's electrical is connected through the control unit:
Ö Application Instruction RKP-D with CAN Bus Interface
Pump Stage 1 Pump Stage 2
RKP-II RKP-II SAE-A SAE-B
Size [cm
3
/R] 19 32
45
63
80
100
140 – –
19 90 Nm – – – 110 Nm –
32/45 185 Nm 185 Nm – – 110 Nm 185 Nm
63/80/100 400 Nm 400 Nm 400 Nm – 110 Nm 280 Nm
140 400 Nm 400 Nm 400 Nm 620 Nm 110 Nm 280 Nm
Tab. 7: Permissible Through Drive Torques
V [cm
3
/R] : Displacement
p [bar] : Pressure
[%] : Hydro-mechanical efficiency
M [Nm] : Through drive torque
η
hm
M
1
159,
V
i
p
i
⋅
η
hm
i
-----------------
i2=
n
∑
⋅=
