Radicon J 100, Руководство пользователя

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5
SERIES J
Definition of service factor
The torque ratings apply to service factor fb = 1,0.
The service factor fb = 1,0 gives continual operation 4 to
8 hours a day at a uniform load without shocks and with
10 to 200 starts an hour. The moment of inertia of the dri-
ven machines is less than 20 % of the electric motor iner-
tia and occasional peak torque may not exceed 1,8
times the torque rating. For other running conditions com-
pensate with service factors according to tables.
Definitions
P
e
= Demand of power from driven machine (kW)
T
e
= Demand of torque from driven machine (Nm)
n
e
= Speed on driven machine (min
-1
)
T
emax
= Max peak torque from driven machine (Nm)
T2 = Max allowed torque at service factor fb =1,0
Thermal rating
Thermal rating is the power in kW (without service factor)
that the gear unit can transmit at continuous operation in
1 hour or more without getting overheated.
Control of thermal rating is essential because if the service
generates more heat than it can emit, severe damage may
occur.
Thermal rating does not need to be controlled if the duty time
is less than 1 hour.
When the duty time is longer than 1 hour the gear unit and
cooling method must be selected so that the drive
transmission has enough thermal rating.
In the tables the thermal rating Pt is given in the following
conditions:
- 25 °C ambient temperature
- 0 to 750 m altitude above sea level
- Ambient air velocity between 1,4 and 3,7 m/s
(sheltered outdoor space)
- Continuous operation
For sizes J100 to J190 standardized solutions for cooling
of the gears are available. An electric fan can be mounted
on the gear. The gear may also be provided with a
water-based oil cooler (contact our Application Engineers for
selection of correct size).
1) At V-belt drive when the motor is placed beside the gear,
check the operation according to the diagram.
Determine the demand of power (P
e
kW) or torque (T
e
Nm) and
speed (n
e
min
-1
) to the driven machine by calculation or measuring
Based on type of load / driven machine, operating hours a day
and number of starts an hour select service factor (fb) according
to table 1 and table 2
Select Series J gear from power rating tables on pages 22 - 52.
Select the mechanical rating:
T2 > fb x T
e
Nm
Shock load ?
Select operation time factor fu according to table 6
Control of thermal rating without extra cooling
Check that the thermal rating of the selected gear Pt is bigger than
required thermal rating:
Pt > P
e
ft x fa x fv x fu
Thermal rating Pt for mineral and synthetic oil are in the tables on
pages 8 - 13. The values are valid for horizontal applications. For
vertical applications 0,8 x Pt is used.
Control of thermal rating with electric fan
Check that the thermal rating of the
selected gear Pt is bigger than required
thermal rating:
Pt > P
e
ft x fa x fu
Thermal rating Pt for mineral and synthetic
oil with fan cooling are in tables on pages
8 -13. The values are valid for horizontal
applications. For vertical application
0,8 x Pt is used.
Can a water based oil cooler be used ?
Order gear with accessories according to 20-digit figure code page 5.
Order a water
based
oil cooler from us
Use a larger gear
size or contact our
Application
Engineers
Order an
electric fan
from us
No, cooling with fan is not enough
Mechanical Rating
Yes
Yes
No No
Yes
Start
No, extra cooling is needed
1)
SELECTION PROCEDURE
Select accessories (V-belt drive, motor mount, KIBO, backstop)
No
Yes
Yes
Select ambient air velocity factor fv according to table 5
Select altitude factor fa according to table 4
Select ambient temperature factor ft according to table 3
Thermal Rating
Use a larger gear
size or contact our
Application
Engineers
T
emax
< 1,8 x T2
0203