Tapered roller bearings mainly bear radial and axial combined loads. The bearing capacity depends on the raceway angle of the outer ring, and the larger the angle, the greater the bearing capacity. This type of bearing belongs to the separated type and is divided into single row, double row, and four row tapered roller bearings based on the number of rows of rolling elements in the bearing. The clearance of single row tapered roller bearings needs to be adjusted by the user during installation; The clearance of double row and four row tapered roller bearings has been given according to user requirements when the product leaves the factory and does not require user adjustment.

Tapered roller bearings have tapered inner and outer raceways, with tapered rollers arranged between them. 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 bearing composite (radial and axial) loads. The axial load capacity of bearings is mostly determined by the contact angle α Determined; α The larger the angle, the higher the axial load capacity. The angle size is represented by the calculation coefficient e; The larger the e-value, the greater the contact angle, and the greater the applicability of the bearing to withstand axial loads.

Tapered roller bearings are usually of the separated type, that is, the conical inner ring component composed of inner rings with roller and cage components can be installed separately from the conical outer ring (outer ring).

Tapered roller bearings are widely used in industries such as automobiles, rolling mills, mining, metallurgy, and plastic machinery.

The secondary reasons for the emergence of scars in the installation process of tapered roller bearings are: the inner and outer rings of the bearings are skewed during installation and assembly; Perhaps it is a sudden surge of load in the process of installation and assembly, ultimately forming bearing scars.

When installing tapered roller bearings, it is necessary to stop according to the working specifications, so as not to cause many problems. If the form or method of the device is not appropriate, it will form linear scars on the raceway surface and bone surface of the bearing. The device of deep groove ball bearings indirectly reflects the precision, lifespan, and function of the bearings during operation.

Although the quality of tapered roller bearings and other aspects are relatively good, rolling bearings are precision components and their use must also be carried out with corresponding caution. No matter how high-performance bearings are used, if not used properly, the expected high performance will not be achieved. There are several precautions for using bearings:

(1) Keep the tapered roller bearings and their surroundings clean.

Even small dust that cannot be seen by the eyes can have a negative impact on the bearings. So, it is important to keep the surroundings clean to prevent dust from entering the bearings.

(2) Use with caution and caution.

Strong impact on tapered roller bearings during use can cause scratches and indentations, which can become the cause of accidents. In severe cases, cracks and fractures may occur, so attention must be paid.

(3) Use appropriate operating tools.

To avoid using existing tools instead, it is necessary to use appropriate tools.

(4) Pay attention to the corrosion of tapered roller bearings.

When operating bearings, sweat on the hands can become the cause of rust. Pay attention to using clean hands for operation, and it is best to wear gloves as much as possible.

The use of auditory recognition for irregular operation of tapered roller bearings is a common method, such as using an electronic stethoscope to detect abnormal noise from a certain part, which is used by experienced operators. If the bearing is in good operating condition, it will emit a low whining sound. If it emits a sharp hissing sound, tapered roller bearings, squeaks, and other irregular sounds, it usually indicates that the bearing is in poor operating condition.

1. Tile surface corrosion: Spectral analysis reveals abnormal concentration of non-ferrous metal elements; Many submicron scale wear particles with non-ferrous metal components appear in the ferrography; Lubricating oil has excessive moisture and acid value.

2. Surface strain on the journal: There are iron based cutting abrasive particles or black oxide particles in the ferrography, and there is a tempering color on the metal surface.

3. Corrosion on the surface of the journal: Spectral analysis revealed abnormal concentration of iron elements, with many submicron particles of iron composition in the iron spectrum, and excessive moisture or acid value of the lubricating oil.

4. Surface strain: Cutting abrasive particles were found in the ferrography, and the abrasive particles were composed of non-ferrous metals.

5. Tile back fretting wear: Spectral analysis revealed abnormal iron concentration, with many submicron wear particles of iron components in the iron spectrum, as well as abnormal lubricating oil moisture and acid value.

Under liquid lubrication conditions, the sliding surface is separated by the lubricating oil without direct contact, which can greatly reduce friction loss and surface wear. The oil film also has a certain degree of vibration absorption ability

Sharp squeaking noise may be caused by improper lubrication. Improper bearing clearance can also cause metallic noise. The dents on the outer track of the tapered roller bearing can cause vibration and create a smooth and crisp sound. If the impact marks caused during installation also produce noise, this noise will vary with the speed of the bearing. If there is intermittent noise, it indicates that the rolling parts may be damaged. The sound of tapered roller bearings occurs when the damaged surface is rolled. If there are pollutants inside the bearing, it often causes a hissing sound. Severe bearing damage can produce irregular and huge noise.

Bearing damage can be detected by hearing, but usually it is already the time to replace the bearing immediately. Therefore, better methods such as using electronic condition monitoring instruments and pre diagnosing the operation of tapered roller bearings are recommended.