Radicon A Junior Series, Руководство пользователя

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SERIES AJ
8
SELECTION PROCEDURE
fOR REDUCER UNITS
EXAMPLE
APPLICATION DETAILS
Absorbed power of driven machine = 0.375 HP
Output speed of gearbox or Input speed of machine = 25 rev/min
Application = Uniformly loaded belt conveyor
Duration of service (hours per day) = 24hrs
Mounting position = D
Ambient temperature = 68
o
F
Running time (%) = 100%
1 DETERMINE RATIO OF GEARBOX REQUIRED
Motor speed 1750 = 70
Gearbox output speed 25
Refer to exact ratios (page 14) for nearest standard ratio = 70:1
3 DETERMINE REQUIRED MECHANICAL
OUTPUT TORQUE CAPACITy OF GEARBOX
Absorbed = Absorbed power x 63025
output torque Gearbox output speed
0.375 x 63025 = 945lb.in
25
Required mechanical = Absorbed output x Fm
output torque torque
945 x 1.25 = 1181lb.in
2 DETERMINE MECHANICAL SERVICE FACTOR (Fm)
Refer to Load Classification by Application, table 5, page 4
Application = Heavy duty, non uniformly fed, bucket conveyor
U = Moderate shock
loading
Refer to mechanical service factor (Fm), table 1, page 3
Duration of service (hours per day) = 24hrs
Therefore mechanical service factor (Fm) = 1.25
Conveyors-uniformly
loaded or fed
apron U
assembly U
belt U
bucket U
chain U
Prime mover
Electric motor,
steam turbine
or
hydraulic motor
Duration of
service hrs
per day
Under 3
3 to 10
Over 10
Load classification-drive
0.80
1.00
1.25
Uniform
0.80
1.00
1.25
Moderate
Shock
4 DETERMINE SIZE OF GEAR BOX REQUIRED
Refer to ratings tables, Input speed = 1750rpm, therefore refer to page 43.
Mechanical output torque capacity must be equal or more than required mechanical output torque capacity
of gear box. Required mechanical output torque capacity = 1181 lb-in. At a 70:1 ratio, nominal output speed
25 an A0730 unit has a mechanical output torque capacity of 1430 lb-in. Therefore the unit is acceptable
NOMINAL
RATIO
NOMINAL
OUTPUT SPEED
REV/MIN
CAPACITy
SIZE OF UNIT
A0510 A0610 A0730 A0860
70.0 25.00
Input Power HP (mechanical)
Input Power HP (thermal)
Output Power HP (mechanical)
Output Torque lb-in (mech.)
Efficiency %
0.39
0.81
0.20
497
50
0.64
1.08
0.34
848
53
0.94
2.24
0.57
1430
60
1.47
2.69
0.92
2320
63
6 CHECK THERMAL CAPACITy OF GEARBOX SELECTED DETERMINE THERMAL INPUT POWER CAPACITy (Pt)
Refer to ratings tables
NOMINAL
RATIO
NOMINAL
OUTPUT SPEED
REV/MIN
CAPACITy
SIZE OF UNIT
A0510 A0610 A0730 A0860
70.0 25.00
Input Power HP (mechanical)
Input Power HP (thermal)
Output Power HP (mechanical)
Output Torque lb-in (mech.)
Efficiency %
0.39
0.81
0.20
497
50
0.64
1.08
0.34
848
53
0.94
2.24
0.57
1430
60
1.47
2.69
0.92
2320
63
Pt = 2.24 HP
Go to point 7
5 DETERMINE EXACT RATIO OF GEARBOX
Refer to exact ratios table, page 12
Exact ratio = 70.0:1
7 0 . 70 70 70 70
Size A0510 Size A0610 Size A0730 Size A0860
Exact
Ratio
Exact
Ratio
Size Exact
Ratio
Exact
Ratio
Nominal Ratio
Column Entry
6 7 8