Technical Description; General Description; Housing - Siemens Flender H2NV Series Assembly And Operating Instructions Manual

5.

Technical description

Observe the instructions in section 3, "Safety instructions"!
5.1

General description

The gear unit described is a two­stage helical­gear unit designed for driving an air­cooler installation for
power stations. It is designed for installation in a vertical position.
The output shaft rotates in an oil­pressure tube (see item 5.6.2). This prevents gear oil from escaping at
the shaft end. The oil supply to and from the gear unit is possible by means of a flanged­on pump or a motor
pump.
The gear unit can be operated in both directions of rotation. Adding­on a backstop
establishes the gear unit for a certain direction of rotation.
The speed range indicated to us in the design stage is covered by the use of a pump.
On­load operation of the gear units at different speeds can cause damage.
The gear units are characterised by a low noise level, which is achieved by helical gears with a high contact
ratio and a sound­damping housing.
The good temperature characteristics of the gear unit are achieved by its high degree of efficiency, large
housing surface and performance­related cooling system.
5.2

Housing

The housing is made of cast iron; if necessary, it may also be made of steel.
The housing is made in one part. It is of torsionally rigid design and its shape imparts very favourable noise
and temperature characteristics.
The gear unit comes with the following equipment:
• Lifting eyes (adequately dimensioned for transport)
• Inspection and/or assembly cover (for inspection)
• Oil dipstick and/or oil­sight glass (for oil level check
• Oil­drain cock or oil­drain plug (to drain the oil)
• Wet­air filter (for aeration and ventilation)
1)
Should both be available, use of the oil dipstick has priority.
Colour codes for ventilating, oil inlet, oil level and oil drainage:
Air­relief point: yellow
Oil­filling point: yellow
Oil level: red
BA 5060 EN 04/2011
1)
)
Oil­draining point:
Lubrication point:
Oil level:
19 / 62
white
red
red