Bosch Rexroth HMU05.1N Series, Руководство по планированию проекта

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Coolant pump delivery height
ΔH Delivery height in m
Δp
p
Pressure of coolant pump in hPa
ρ Specific weight of coolant in kg/l
Fig. 4-23: Coolant pump delivery height
A correctly sized coolant pump can be operated at or near the point of best
efficiency. This requires the installation characteristic to be determined as
precisely as possible. Excess safety margins often result in an unnecessarily
large coolant pump that then has to be operated at partial load.
If the required pressure of the coolant pump is above the maximum permitted
system pressure, it is necessary to size the tube diameter or the temperature
increase ΔT in the cooling system again.
Cooling unit or refrigerating unit
Air-liquid cooling unit and control cabinet air cooler
Data for selection Determining specific cooling capacity
P
V
Power dissipation being discharged in kW
P
01
Specific cooling capacity in kW/K
T
amb
Ambient temperature in °C
T
in
Inlet temperature of coolant in heat exchanger in °C
Fig. 4-24: Determining specific cooling capacity
For economic reasons, 50°C should be selected as the maximum outlet tem‐
perature of the drive components (= T
in
) for air-liquid cooling units. An air-liq‐
uid cooling unit is only useful up to an ambient temperature of approx. 35°C
and up to 3 kW.
Coolant temperature change
P
V
Power dissipation being discharged in kW
ρ Density of coolant in kg/l
c
Cl
Specific thermal capacity of coolant in kJ/kgK
Q Flow rate of coolant in l/min
Fig. 4-25: Coolant temperature change
Bosch Rexroth AG DOK-INDRV*-HXX05******-PR02-EN-P 70/407
Rexroth IndraDrive ML Drive Systems with HMU05
Combining the individual components