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The following properties of series connection generally have to be observed:
●
Series connection does not allow setting the required flow rate individu‐
ally for each of the connected components.
●
The required system pressure corresponds to the sum of all pressure
decreases of the connected individual components. This means a lower
degree of hydraulic operational safety of due to high system pressure.
●
The temperature level of the coolant increases from component to com‐
ponent because each power dissipation discharged to the coolant in‐
creases its temperature. This means uneven machine temperature in‐
crease by the components being cooled.
Combined interconnection
Fig. 4-33:
Combined interconnection of drive components being cooled
The combined interconnection of the drive components being cooled allows
using the advantages of parallel and series connection.
Condensation protection
Risk of damage. Drive components cannot
build condensation.
NOTICE
In temperate zones (up to 40°C and 70% humidity), the inlet temperature of
the coolant may be at a maximum 5 K below the temperature in the control
cabinet.
Safest protection against condensation:
Coolant inlet temperature = ambient temperature
The temperature of the coolant flowing through liquid-cooled drive compo‐
nents generally differs from the temperature of the ambient air.
Depending on the humidity, the ambient air contains water vapor. The
amount of water vapor which can be absorbed by the air depends on the air
temperature and air pressure. The warmer the air, the more water vapor it
can absorb at the same air pressure.
When warm air gets in contact with a less warm object, a moist film (conden‐
sation) forms on the surface of the object if the temperature of the object is
below the condensation temperature.
Drive components with protection classes IPx4, IPx5, IPx6 are not at risk
from condensation because their design provides sufficient protection against
water.
DOK-INDRV*-HXX05******-PR02-EN-P
Bosch Rexroth AG
75/407
Rexroth IndraDrive ML Drive Systems with HMU05
Combining the individual components
Содержание Rexroth HMU05.1N Series
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