DESCRIPTION
HANSEN M4 ACC GEAR UNITS
FOR AIR COOLED CONDENSER DRIVES
Coding
Type
1 : series P : Hansen M4
2 : V : vertical low speed shaft
3 : P : parallel shafts
4 : Size : DA-> FX
5 : number of stages: 2
Application
6:ACC:Air Cooled Condenser
Shaft arrangement
: high speed shaft extension : U : up
8 : low speed shaft extension : D : down
9 : low speed shaft type : N : normal solid shaft
Ratio
10 : nominal ratio of the gear unit
Drive package
11 : K: lantern drive package
Motor
12 : motor size and number of poles
Units are designed to comply with the standard CTI-111 specifications
for gear units.
The mechanical power ratings shown in the tables relate respectively to
input speeds of 1800, 1500, 1200, 1000, 900 and 50 RPM at the
high speed shaft. They are also valid for asynchronous speeds which
are max. 3% lower than the synchronous speeds.
Interpolation will yield power rating values for intermediate speeds. The
power rating for speeds lower than 50 RPM is based on the
continuous torque rating of that speed.
For input speeds exceeding 1800 RPM, please refer to us.
Basic components
Helical gears
Designed and rated in accordance with AGMA for maximum load
capacity, minimum losses and quiet operation.
All geared components are manufactured from alloy steel, gas
carburized, hardened and precision ground.
Low speed shafts
The low speed shafts are in solid version.
Length of the shaft extension according to customer's specification.
Bearings
Heavy duty roller bearings of the tapered, cylindrical or spherical roller
type.
Calculated in compliance with ISO and renowned bearing
manufacturers.
The low speed shaft bearings are selected to allow considerable thrust
loads. The nominal permissible thrust load F
xN
mentioned in the table,
page A41, is defined for a SFmin = 2, low speed shaft rotating
counter-clockwise and guarantees a calculated bearing life of 100000
hours.
Housings, lantern housings and covers
Made from grey pearlitic cast iron.
Machined on CNC machining centers.
Designed to ensure strength and rigidity.
Unused tapped holes are plugged.
Monobloc housing.
Systems
Lubrication
Lubricants: mineral oils are normally used. Lubricants should always
contain adequate EP-additives (refer to Service Manual).
Pump lubrication for the upper bearings is standard available.
The lubrication is guaranteed for input speeds down to 50 min
-1
(windmilling conditions).
The gear unit housing acts as a large oil sump.
Grease point with nipple according to DIN 1412 for grease lubri-
cation of the bearing at side of the low speed shaft end.
Checking of the oil level is done by means of the gear unit dipstick
(always in the plugged position).
Cooling
Heat generated in the gear unit due to losses, can be dissipated by:
natural cooling through the housing
additional fan cooling, shaft driven axial fan incorpo-
rated in the lantern housing
Free air entry at the suction side should always be
guaranteed
Thermal checks: refer to us.
Fill in "Request for quotation" on page A .
Sealing
Static: generalized use of sealing compound
inspection cover on the gear unit: re-usable flat seal
low speed shaft: drywell
Rotary: high speed shaft: standard : dust lip oil seal
option: regreasable labyrinth
low speed shaft: standard : double dust lip oil seal
option: regreasable labyrinth
The gear unit
1
P
2
V
3
P
4 5
2 U
6
A C C
7
U
8
D
9
N
10
11
K
12
A3
