Tabla de contenido
Publicidad
Idiomas disponibles
Idiomas disponibles
RODAMIENTOS
The bearings for Greenheck fans are carefully selected to match the maximum load and operating conditions of the specific
class, arrangement, and fan size. The instructions provided in this manual and those provided by the bearing manufacturer, will
minimize any bearing problems. Los rodamientos del eje son las partes móviles más críticas del ventilador. Por esta razón se
debe prestar atención especial al mantener que los rodamientos estén limpios y bien lubricados.
Refer to the following chart and the manufacturers instructions for grease types and intervals for various operating conditions.
Never mix greases made with different bases. This will cause a breakdown of the grease and possible failure of the bearing.
Horario de Lubricacion de los Rodamientos para los Ventiladores Greenheck.
V-BELT DRIVES
V-belt drives must be checked on a regular basis for wear, tension, alignment and dirt accumulation. Premature or frequent belt
failures can be caused by improper belt tension, (either too loose or too tight) or misaligned sheaves. Abnormally high belt
tension or drive misalignment will cause excessive bearing loads and may result in failure of the fan and/or motor bearings.
Conversely, loose belts will cause squealing on start-up, excessive belt flutter, slippage, and overheated sheaves. Either
excessively loose or tight belts may cause fan vibration.
When replacing V-belts on multiple groove drives all belts should be changed to provide uniform drive loading. Do not pry belts
on or off the sheave. Loosen belt tension until belts can be removed by simply lifting the belts off the sheaves. After replacing
belts, insure that slack in each belt is on the same side of the drive. Belt dressing should never be used.
Do not install new belts on worn sheaves. If the sheaves have grooves worn in them, they must be replaced before new belts
are installed.
Horario de Relubricación en meses
RPM
1
1
/
/
del
-
1
-
2
8
1
/
Ventilador
1
1
2
To 250
6
6
500
6
6
750
6
5
1000
6
4
1250
5
3
1500
5
2
2000
5
1
2500
4
0.5
3000
4
0.5
4000
3
0.25
5000
2
0.25
* Suggested initial greasing interval is based on 12 hour per day operation and 150 degree F. maximum
housing temperature. For continuous (24 hour) operation, decrease greasing interval by 50%.
- If possible relubricate with grease while in operation, without endangering personnel.
- For ball bearings (operating) relubricate until clean grease is seen purging at the seals. Be careful not to
unseat the seal by over lubricating.
- For ball bearings (idle) add 1-2 shots of grease up to 2" bore sizes, and 4-5 shots of grease above 2" bore sizes
with hand grease gun.
- For roller bearings relubricate with 4 shots of grease up to 2" bore size, 8 shots for 2"-5" bore size, and 16
shots above 5" bore size with hand grease gun.
- Adjust lubrication frequency based on condition of purged grease.
- A high quality lithium base grease conforming to NLGI Grade 2 consistency, such as those listed below,
should be used.
MOBILITH SHC 220
MOBILITH AW2
WARNING: Lubricate bearings prior to periods of extended shutdowns or storage and rotate shaft monthly
to aid in preventing corrosion. If the fan is stored more than three months, the bearings should be
purged with new grease prior to start-up.
Deflection = Belt Span
64
Belt Span
Calibre de los Rodamientos en Pulgadas
5
15
7
/
/
/
1
-
1
-
2
-
3
8
16
16
7
/
3
/
1
8
2
16
3
3
6
6
6
6
5
4
4
3
3
3
2
2
2
1
1
1
1
0.5
1
0.5
0.25
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
TEXACO MULTIFAK AFB2
TEXACO PREMIUM RB
The proper tension for operating a V-belt drive is the
lowest tension at which the belts will not slip at peak
load conditions. For initial tensioning, the proper belt
deflection half-way between sheave centers is
for each inch of belt span. For example, if the belt
span is 64 inches, the belt deflection should be 1 inch
using moderate thumb pressure at mid-point of the
drive. Check belt tension two times during the
first 24 hours of operation and periodically thereafter.
10
*
3
15
15
/
/
/
-
3
-
4
-
16
16
16
1
/
1
/
1
/
2
4
2
5
2
5
4
3
3
3
2
2
2
1
1
1
0.5
0.5
0.5
0.25
0.5
0.25
0.25
0.25
0.25
0.25
0.25
SHELL ALVANIA #2
EXXON UNIREX N2
1
/
"
64
Publicidad
Tabla de contenido
