Bearings needed for Crushers in the Cement Industry

Oct 08, 2023

In crushers in the cement industry, the following types of bearings are usually used:

Aligning ball bearing: Aligning ball bearing is a commonly used mechanical bearing with an automatic alignment function, which can compensate for axis line deviation caused by installation error, journal bending, bearing seat deformation, and other factors.

The functions of self-aligning ball bearings include the following aspects:

Support the rotating shaft: Aligning ball bearings can support the rotating shaft of the crusher to ensure the smooth operation of the transmission device.

Reduce or lower the friction between the bearing and the shaft: The steel balls and cages inside the self-aligning ball bearing can reduce the friction between the bearing and the shaft and improve the efficiency of the transmission device.

Improved rotation performance: Due to the strong self-aligning ability of the self-aligning ball bearing, it can automatically adjust the deviation from the shaft, thereby improving the rotation performance of the crusher.

Bear radial load and axial load: Aligning ball bearings can bear both radial and axial loads to ensure stable crusher operation.

Protect bearings: Aligning ball bearings have strong self-aligning capabilities, which can compensate for axis center line deviations caused by installation errors, journal bending, and other factors, effectively protecting the bearings from damage.

Cylindrical roller bearing: Cylindrical roller bearing is a common rolling bearing consisting of an inner ring, an outer ring, cylindrical rollers, and a cage. In crushers, cylindrical roller bearings are usually used to support the drive shaft and main shaft, bear radial loads, and maintain rotation accuracy.

Cylindrical roller bearings are mainly used to support the main shaft and transmission shaft in the crusher and bear radial load and axial load. Due to the bad working environment of the crusher, the bearings are easily affected by impact and vibration, so it is very important to choose cylindrical roller bearings with high load-bearing capacity and good impact resistance.

The functions of cylindrical roller bearings mainly include the following aspects:

Support the rotating shaft: Cylindrical roller bearings can support the rotating shaft of the crusher to ensure the smooth operation of the transmission device.

Reduce and lower the friction between the bearing and the shaft: The steel balls and cages inside the cylindrical roller bearing can reduce the friction between the bearing and the shaft and improve the efficiency of the transmission device.

Improved rotation performance: Because the cylindrical roller bearing has a certain self-aligning ability, it can automatically adjust the deviation from the shaft, thereby improving the rotation performance of the crusher.

Bear radial load and axial load: Cylindrical roller bearings can bear radial load as well as axial load, ensuring the stable operation of the crusher.

Bearing protection: Cylindrical roller bearings have strong impact resistance and can compensate for axis center line deviations caused by installation errors, journal bending, and other factors, effectively protecting the bearings from damage.

Cylindrical roller bearings N type, NU type, NJ type, and NF type are the most commonly used bearing types in cement equipment. The picture below is our bearing NU222ECMC3.

Tapered roller bearing: Tapered roller bearing is a common rolling bearing consisting of an inner ring, an outer ring, a tapered roller, and a cage. In crushers, tapered roller bearings are usually used to support the drive shaft and main shaft, bear radial load and axial load, and maintain rotation accuracy.

In the cone crusher, the tapered roller bearings bear most of the axial load and radial load, making the overall performance of the cone crusher more stable.

The main feature of tapered roller bearings is that they can withstand composite axial and radial loads. At the same time, their ability to withstand radial loads increases as the contact angle increases. This kind of bearing is a separable bearing. The bearing's inner and outer rings can be installed separately.

In cone crushers, tapered roller bearings are usually installed between the main shaft and rotating bearings to help the crusher withstand the impact and vibration from the material crushing process. These bearings need to have high precision and high wear resistance to ensure the stable operation of the crusher.

Angular contact ball bearings: The Angular contact ball bearing has the characteristics of spherical rolling elements and can withstand radial loads. In crushers, angular contact ball bearings are usually used to support the main shaft and drive shaft and bear radial loads. Since the rolling elements of angular contact ball bearings are spherical, their rolling contact area is large, and they can withstand higher loads. At the same time, angular contact ball bearings have certain self-aligning performance and can compensate for axis center line deviations caused by installation errors and other factors.

Angular contact ball bearings also have certain applications in crushers. This kind of bearing is mainly used to bear the combined action of radial load and axial load and is more suitable for this combined load situation in the crusher.

The characteristic of angular contact ball bearings is that they can withstand combined radial and axial loads and their load-bearing capacity increases as the contact angle increases. In crushers, angular contact ball bearings are usually installed between the main shaft and rolling bearings to withstand the impact and vibration from the material crushing process.

In general, angular contact ball bearings mainly play the role of bearing combined radial and axial loads on the crusher. It is important to select appropriate models and specifications based on actual needs to meet different working conditions.

The picture below shows the angular contact ball bearing QJ322M produced by FV Company for its customers.

The application of these bearings on crushers needs to be selected according to different parts and working conditions. For example, for parts that bear radial loads, you can choose cylindrical roller bearings or tapered roller bearings; for parts that bear axial loads, you can choose thrust ball bearings, etc. In order to ensure the normal operation of the crusher and extend the service life of the bearings, regular inspection and maintenance of the bearings is necessary.