Types and functions introduction of vibrating screen bearings

Dec 26, 2023

The vibrating screen is a kind of equipment widely used in various industries. It is mainly used to screen materials according to their particle size, density and other characteristics. In the vibrating screen, bearings play a vital role, and their types and functions are as follows:

1. Types of vibrating screen bearings

Spherical roller bearing

Spherical roller bearings have double rows of rollers, which mainly hold radial loads and can withstand axial loads in any direction. This kind of bearing can automatically adjust at the center of the bearing under the action of axial load and keep the center position unchanged. Therefore, this bearing is particularly suitable for vibrating screens and can withstand the alternating axial and radial loads caused by vibration.

The picture above is the spherical roller bearing 24152MB/W33 C2 designed and produced by FV.

Cylindrical Roller Bearings

Cylindrical roller bearings only have one row of rollers that mainly bear radial loads and cannot bear axial loads. Because its rolling elements are cylindrical, it has high rigidity and rotation accuracy when the speed is high and the load is large. Therefore, this bearing suits vibrating screens and can withstand larger radial loads and higher rotational speeds.

Tapered Roller Bearings

Tapered roller bearings have single or multiple rows of rollers and mainly bear radial and axial loads. Because its rolling elements are conical, it can automatically adjust the radial clearance under the action of axial load and improve the bearing capacity. Therefore, this kind of bearing is suitable for use in vibrating screens and can withstand large axial loads and radial loads.

The picture above is the imperial four-row tapered roller bearing BT4B 328842 produced by FV.

Thrust bearings

Thrust bearing is a special type of bearing that mainly bears axial load. It is characterized by a compact structure, lightweight, and small space occupation. In vibrating screens, thrust bearings are usually used to bear the weight of the screen body and the impact of materials on the screen body.

2. The role of vibrating screen bearings

Supporting function: The bearing is an important component connecting the screen body and the motor. It bears the driving force from the motor through the internal rolling elements or sliding surfaces and transmits the rotational motion of the motor to the screen body, causing the screen body to vibrate. Therefore, the supporting role of the bearing is the basis for ensuring the normal operation of the vibrating screen.

Shock absorption: During the operation of the vibrating screen, greater vibration and noise will be generated due to the materials' impact and the equipment's resonance. The elastic elements inside the bearing can absorb part of the vibration energy and act as a shock absorber, helping to reduce the vibration and noise of the equipment.

Bearing load: The vibrating screen must bear loads from various aspects such as materials, screen body weight and equipment resonance during operation. Bearings can effectively bear these loads and ensure the stable operation of the equipment.

Adjusting the clearance: In some types of vibrating screens, the position of the bearings and the clearance of the screen body have an important impact on the screening effect and operational stability of the equipment. By adjusting the position of the bearing, the relative position between the screen body and the motor can be adjusted, thereby optimizing the operating performance of the equipment.

Lubrication: The lubricant inside the bearing can reduce frictional resistance, reduce wear, and increase the service life of the bearing. At the same time, good lubrication also helps reduce the energy consumption of the vibrating screen and improve its working stability.

Sealing protection: The bearing's sealing ring or sealing cover and other structures can prevent dust, moisture and other impurities from entering the inside of the bearing and protect the rolling elements and lubricant from contamination. It helps ensure the proper operation and service life of the bearings.

Guidance and positioning: In the vibrating screen, the bearings also play the role of guidance and positioning. By rationally selecting the bearing type and installation method, the motion trajectory and direction of the screen body can be controlled, and the screening efficiency and accuracy of the equipment can be improved.

To sum up, bearings play a vital role in vibrating screens. According to different types and specifications of vibrating screens, selecting the appropriate bearing type and specifications is one of the key factors in ensuring the machine's smooth operation and improving its performance. In practical applications, factors such as the bearing's working conditions, load size, speed requirements, and service life should be comprehensively considered to select the appropriate bearing type and specification. In addition, correct installation and maintenance are also important methods to ensure the normal operation of bearings and extend their service life.