Tapered roller bearings are mainly subjected to radial-based radial and axial combined loads. Bearing bearing capacity depends on the outer raceway angle, the greater the angle the greater the carrying capacity. This
type of bearing is a separate bearing, according to the number of
rolling bearings in the bearing is divided into single row, double row
and four row tapered roller bearings. Single row tapered roller bearing clearance to be installed in the
user to adjust; double row and four row of tapered roller bearing
clearance has been in the product factory according to user requirements
given, no user to adjust.
Tapered roller bearings are conical inner and outer ring raceways, tapered rollers are arranged between the two. The projection lines of all conical surfaces converge at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for receiving composite (radial and axial) loads. The
axial load capacity of the bearing is mostly determined by the contact
angle α; the larger the α angle, the higher the axial load capacity. The angle size is expressed by the calculation factor e; the greater
the e value, the greater the contact angle, the greater the
applicability of the bearing to the axial load.
Tapered roller bearings are usually separable, that is, by the roller
and the cage assembly of the inner ring of the conical inner ring
components can be installed with the conical outer ring (outer ring).
Tapered roller bearings are widely used in automobile, rolling mill, mining, metallurgy, plastic machinery and other industries.
The
secondary reason that the tapered roller bearing is emerging in the
process is that the bearing is being mounted, the inner ring is formed
during assembly, and the outer ring is skewed; or is the current charge
in the process of assembling and assembling the load, and eventually
forming the bearing The
Is
the installation of tapered roller bearings in accordance with the work
norms to stop, or will form a lot of achievements, such as the form of
the device or the way is not, then the formation of the bearing raceway
surface and the formation of bearings on the backbone of the emergence
of linear marks. Deep groove ball bearing device indirectly reflects the use of bearings when the precision, the number of life and function.
Tapered
roller bearing quality and other aspects are better, but the rolling
bearing is a precision component, its use must also be carefully
accordingly. No matter how high the performance of the bearings, if used improperly, will not get the expected high performance. The following concerns apply to the bearing:
(1), keep the tapered roller bearing and its surroundings clean.
Even if the eyes can not see the small dust, will give the bearing a bad influence. Therefore, to keep the surrounding clean, so that dust will not penetrate the bearing.
(2), be careful to use.
In
the use of tapered roller bearings to give a strong impact, will
produce scars and indentation, as the cause of the accident. Severe cases, will crack, break, so must pay attention.
(3), use the appropriate operating tools.
Avoid using existing tools instead, and you must use the right tools.
(4), pay attention to the corrosion of tapered roller bearings.
Operation of the bearing, the hands of the sweat will become the cause of rust. Pay attention to the use of clean hands, it is best to bring gloves as much as possible.
Tapered
roller bearings use auditory to identify irregular operation is a very
common method, such as by means of electronic stethoscope to detect a
part of the abnormal noise is experienced operators to use. If the bearing is in good operating condition will be issued a low
whining sound, if issued a sharp hissing tapered roller bearings, squeak
and other irregular sound, usually that the bearing in a bad operation.
1, tile surface corrosion: spectral analysis found that non-ferrous
metal element concentration anomalies; iron spectrum in the emergence of
many non-ferrous metal components of sub-micron wear particles;
lubricants moisture exceeded, acid value exceeded.
2, journal surface tension: iron in the iron cutting abrasive
particles or black oxide particles, the presence of metal surface
tempering color.
3, journal surface corrosion: spectral analysis found that iron
concentration anomalies, iron spectrum has many iron components of
submicron particles, lubricating oil or excessive acid value exceeded
the standard.
4, surface strain: iron found in the cutting abrasive, abrasive composition of non-ferrous metals.
5, tile back fretting wear: spectral analysis found that iron
concentration anomalies, iron spectrum in many iron components submicron
wear particles, lubricating oil moisture and acid value anomalies.
In the liquid lubrication conditions, the sliding surface is separated
by lubricating oil without direct contact, but also can greatly reduce
the friction loss and surface wear, the film also has a certain
vibration absorption capacity
Sharp creak noise may be caused by improper lubrication. Inappropriate bearing clearance can also cause metal sound. Tapered
roller bearings The dents on the outer rails of the tapered roller can
cause vibrations and cause smooth and crisp sounds. If noise is caused
by the percussion scars caused by the installation, the noise will vary
depending on the bearing speed. If
there is intermittent noise, it means that the rolling parts may be
damaged, tapered roller bearings This sound is caused when the damaged
surface is rolling over the bearing if the pollutants often cause
hissing, serious bearing damage will Produce irregular and huge noise.
Bearing damage can be detected by hearing, but usually at this time has to be the bearing must be replaced immediately. Therefore,
the preferred method, such as the use of electronic condition
monitoring equipment, tapered roller bearings pre-rupture of the
operation of the bearing.
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