USE AND MAINTENANCE MANUAL
2-Speed Gearboxes Series CE
M
.CE.GEN.ENG.DOCX
Issued
2018
Rev.03
Page 31 / 59
4
A
SSEMBLING POSITIONS AND LUBRICATION
4.1
C
HOOSING THE LUBRICATION MODE
CE gearboxes are designed for working with 2 different lubrication modes:
▪
Splash lubrication (see chapter 4.2)
The gearbox is filled with a proper amount of oil and then plugged.
During operation, the gearbox will develop a certain amount of heat, due to the oil splashing,
that will raise the gearbox temperature.
For this reason, this way of lubrication is used only when there are frequent shifting
operations, frequent speed changes, variable turning speeds and frequent machine downtimes
such as, for example, rests for tool changes.
Splash lubrication should not be used if the gearbox speed exceeds 4500 rpm and/or its
operation is continuous for long periods.
Moreover, it cannot be used in some assembly positions (see chapter 4.2) in which the oil
wouldn't lubricate properly all the inner parts.
In order to evaluate the gearbox thermal conditions during working, it is strongly suggested to
carry out tests with an ordinary working cycle.
The gearbox can stand temperatures up to 120 °C (oil 110°C) without problems.
▪
Recirculating lubrication (see chapter 4.3)
The gearbox is connected to an oil supply unit, that ensures a continuous oil recirculation.
This continuous oil flow produces a better lubrication of the inner parts and improves the heat
dissipation.
For these reasons, this way of lubrication is used In case of continuous rotation at high speeds
and with short downtimes.
It is also used in some assembly positions, even if the speeds and operating times are not
high, because it is the only way to lubricate all the inner parts properly.
-All Baruffaldi gearboxes are designed for operation with inner pressure equal to outer
(atmospheric) pressure.
-Any overpressure
will increase seals closing force thus causing a greater friction, higher heat
production and early wear.
-Any depressure
will decrease seals closing force thus allowing oil leakage and internal pollution
due to dust, fluids and so on.
-The gearbox seal can have a small leakage over time that is drained outside the motor flange
(The motor seal is necessary to prevent oil from getting into the motor and damaging it)
-According to the gearbox model and the assembling position,
vent valves (
f
,
g
)
are supplied on
the gearbox, in order to keep the inner pressure equal to the outer pressure.
Lubrication is a basic factor for the right operation of the gearbox over time.
Before starting the gearbox, always check and follow the gearbox way of lubrication (see
chapter 1.6).
Do not operate the gearbox without oil as it would fail in a short time!
(g)
(f)
Make sure that the air
orifice is not stuck
