DESCRIPTION
HANSEN P4 GEAR UNITS
FOR AIR COOLED CONDENSER DRIVES
A45
The gear unit
Units are designed to comply with the standard CTI specifications.
The mechanical power ratings shown in the tables relate respectively
to input speeds of 1800, 1500, 1200, 1000, 900 and 750 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 750 RPM is based on the
continuous torque rating of that speed.
For input speeds exceeding 1800 RPM, please refer to us.
Coding
Type
1 : series Q : Hansen P4
2 : V : vertical low speed shaft
3 : P : parallel shafts
4 : Size: C, ..., F
5 : number of stages: 2
5 bis : / : normal execution (no code)
Shaft arrangement
6 : high speed shaft extension: U: up
7 : low speed shaft extension: D: down
8 : low speed shaft type: N: normal solid shaft
Ratio
9 : nominal ratio
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.
Extended shafts are available upon request.
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 tables, page A71, is defined for a SFmin = 2, low speed shaft
rotating counter-clockwise and guarantees a calculated bearing life
of 100000 hours.
1
Q
2
V
3
P
4 5
2
5 bis
-
6
U
7
D
8
N
-
9
Housings, bearing 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.
Horizontal split 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.
Grease point with nipple according to DIN 71412 for grease lubrica-
tion of the bearing at side of the low speed shaft end.
The gear unit housing acts as a large oil sump.
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: an electrically driven axial fan can
be incorporated (see pages A69-A70)
Characteristics of electrically driven fans: standard
3 phase, 50 Hz, 400 V ± 10%, insulation class: IP 55
Free air entry at the suction side should always be
guaranteed
Thermal checks see page A48
Sealing
Static: generalized use of sealing compound
inspection cover on the gear unit: O-ring
low speed shaft: drywell
Rotary: high speed shaft: dust lip oil seal
low speed shaft: dust lip oil seal
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