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Assembly and Operating Instructions – Gear Units R..7, F..7, K..7, K..9, S..7, SPIROPLAN® W
4
Accessory equipment
Mechanical Installation
4.14.7 Oil expansion tank
The oil expansion tank is to compensate for oil volume variations in the system caused
by temperature fluctuations. When the gear unit temperature increases, the expansion
tank absorbs some of the increasing oil volume and feeds it back to the gear unit as the
temperature goes down. As a result, the gear unit is always completely filled with oil.
The figure shows an example of a gearmotor in mounting position M4:
4.14.8 Oil-air cooler for splash lubrication /OAC
If the thermal rating of the naturally cooled gear unit is not sufficient, an oil-air cooling
system can be used.
The cooling system is delivered without electrical wiring and piping as a complete unit
on a base frame for separate installation.
The standard scope of delivery of the cooling system includes:
•
Pump with directly mounted asynchronous motor
•
Oil-air heat exchanger
•
Temperature switch with 2 switching points
SEW-EURODRIVE uses oil-air cooling systems for standard gear units in sizes
OAC 005 and OAC 010.
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