Lubrication - Rexnord HANSEN P4 Manuel D'entretien

ansen
T R A N S M I S S I O N S
D
Table 4
D PT
Gear unit
size
±5
QH.J3 - QH.J4 80 M42 105
QH.K3 - QH.K4 80 M42 105
QH.L3 - QH.L4 80 M48 120
QH.M3- QH.M4 80 M48 120

6. LUBRICATION

Lubrication serves four main functions :
- prevents metal to metal contact in gears and bearings
- reduces friction losses
- dissipates the generated heat from gears and bearings
- prevents corrosion
Different lubrication systems can be used, depending on
- gear velocity
- gear unit mounting position
- operating conditions
HANSEN gear units use one of following systems :
- splash lubrication
- forced feed lubrication: - circulation lubrication
- pressure lubrication
These systems can be completed with auxiliary cooling in different forms (see
COOLING).
6.1. SPLASH LUBRICATION
Splash lubrication is standard with horizontal shaft gear units and for speeds
between 750 and 1800 min -1 at the high speed shaft. Gears and output
shaft bearings are lubricated by immersion in the oil bath. Oil splash from
gears fill oil pockets in the housing, assuring gravity circulation lubrication of
the bearings via channels in housing and covers.
For other speeds at the high speed shaft, refer to HANSEN.
6.2. FORCED FEED LUBRICATION
All rotating elements above oil bath level are lubricated by a gear pump
forcing the oil through pressure lines.
Pumps can be either of the integral type, driven by one of the gear unit
shafts, or a motorpump. The integral type pumps are always provided with a
built-in reversing device for operation in both directions.
In case of motorpumps the direction of rotation is always indicated.
Built-on pumps reach their normal operating capacity already after a few sec-
onds. However, in order to avoid unwanted alarm during the start-up period,
we recommend to delay the triggering of the warning signal by 5 to 10
seconds.
Motorpumps should be switched on at least one
minute before starting the gear unit.
6.2.1. Circulation lubrication
- With integral pump (fig.4).
The circulation lubrication system consists of
- a pump P
- a filter F with bypass (standard from gear unit size G onwards)
- a flow switch Mf (standard from gear unit size G onwards)
Flow switch must be wired in a circuit to automa-
!
tically stop the main drive motor when oil flow
drops below alarm setting.
- With motorpump
The service manual of the lubrication and cooling system gives detailed
information about the circulation lubrication system with motorpump.
®
S 1 = S - S
PR
PT
3d
∆S
PR max
mm inch mm inch Q* DIN 2093
4.1 1,4 0.055 2 x 3
4.1 1,4 0.055 2 x 3
4.7 1,4 0.055 2 x 4
4.7 1,4 0.055 2 x 4
Q*: number of disc springs
FIG. 4
F
P
A
6.2.2. Pressure lubrication
A 160
A 160
The service manual of the lubrication and cooling system gives detailed
A 160
information about the pressure lubrication system.
A 160
6.2.3. Instrumentation and settings
For detailed information on lubrication system, instrumentation and settings,
refer to the certified drawing, the service manual of the lubrication and cooling
system and/or separate leaflets on instrumentation, supplied with this manual.
Settings stated on the certified drawing have been
set during testrun by HANSEN and should not be
altered without written authorisation.
Presettings, if stated, are recommended values set by HANSEN, but may be
altered according to local conditions.
6.3. OIL SELECTION
Mineral oils containing EP additives, which increase oil film load capacity,
should be used.
Always use oil of the type and with viscosity
characteristics corresponding to those given on
gear unit's nameplate.
The viscosity has been selected according to operating conditions specified in
the order.
For conversion from ISO viscosity class VG to other viscosity units see table of
corresponding lubricants p. 36.
The table is not exhaustive; equivalent brands can be used.
The oil suppliers are responsible for the selection and composition of their
products.
Synthetic oils may be used only after written au-
thorisation from the HANSEN Engineering Depart-
ment.
Only synthetic oils of the polyalpha-olefine type (SHF-type, Synthetic Hydrocar-
bon Fluid) containing EP additives may be used. Due to the good oxidation-
durability of synthetic oils their life expectancy is longer than that of mineral oils
of the same viscosity and for the same working conditions. A longer use is on-
ly permitted if an oil analysis is made regularly (every 4000 hours) by the oil
supplier or a qualified laboratory, in order to determine the exact life-time of
the oil.
6.4. OIL QUANTITY
The oil level is determined by min. and max.
M
markings on the dipstick.
An oil level glass or an oil level switch is optionally available.
THREADED DIPSTICKS SHOULD BE CHECKED IN
PLUGGED POSITION.
The oil level must be checked when the gear unit is
out of operation.
On systems with filters and coolers, oil level must
be checked with lubrication and cooling system
filled with oil and after short test run.
The lubrication and cooling system, including the cooler, is automatically
utilized when the oil bath temperature rises above 60°C (140°F).
If oil filling is required to take place earlier, manual ventilation of the cooler
must be carried out whilst the pump is in operation.
The oil quantity mentioned on the nameplate of the gear unit is an approximate
value given only for procurement purposes.
ansen
Mf
• •
•
•
(see fig. 5, page 9)
8