The core function of the self-aligning roller bearing of the crusher is to compensate for the misalignment error between the shaft and the bearing seat through the automatic self-aligning function, while bearing high radial loads and impact vibrations during the crushing process, ensuring stable operation of the equipment and extending its service life. The specific functions are as follows:
1. Automatic centering, compensating for installation errors and shaft deviation
Structural characteristics: The self-aligning roller bearing has double row symmetrically arranged spherical rollers, the outer raceway is designed as a spherical surface, and the inner raceway is inclined at a certain angle to the bearing axis. This structure enables the bearing to automatically adjust the contact position between the rollers and the raceway during operation, compensating for the coaxiality error between the shaft and the bearing seat.
Application scenario: Due to vibration, impact, or installation errors during the operation of the crusher, it is easy to cause relative deviation between the shaft and the bearing seat (such as shaft deflection, non concentricity).
. Self aligning roller bearings use automatic centering function to avoid additional stress concentration caused by deflection and reduce the risk of bearing damage. Case support: In jaw crushers, the connection between the eccentric shaft and the moving jaw often vibrates due to material impact, resulting in shaft deflection. Self aligning roller bearings (such as SKL brand) can compensate for a deviation angle of 1-2.5 degrees through self-aligning design, ensuring the normal operation of the bearing.2. Bearing high radial loads and impact vibrations
Load capacity: The rollers of the self-aligning roller bearing are designed in a drum shape, with a large contact area with the raceway, and can withstand large radial loads.
. At the same time, its double row structure can disperse the load and avoid the failure of single row bearings due to local overload.Impact resistance: The crusher generates strong impact vibrations when crushing materials (such as hammer impact in hammer crushers and plate hammer impact in impact crushers). Spherical roller bearings enhance the strength of rollers and retainers by optimizing their internal structure, such as solid alloy copper retainers and quenched steel stamped retainers, to resist impact loads. Data support: The rated dynamic load of self-aligning roller bearings is 30% -50% higher than that of ordinary roller bearings, and is suitable for heavy-duty conditions such as crushers. For example, in the cone crusher, the self-aligning roller bearing can withstand the huge crushing force (up to hundreds of tons) transmitted by the main shaft to ensure the stable operation of the equipment.
3. Adapt to harsh working conditions and extend equipment life
Environmental adaptability: The crusher often operates in harsh environments such as dust, humidity, and high temperature.
. Spherical roller bearings are designed with seals (such as double-sided seals and double lip seals) and special lubrication systems (such as long-lasting grease and re lubrication holes) to prevent dust intrusion and grease loss, thereby extending the bearing life. Wear resistance: The bearing raceway and roller surface are treated with special treatments (such as high-frequency quenching and silicon carbide coating) to increase surface hardness (HV1500 or above) and reduce wear. For example, in the vibrating screen, the wear resistance of the self-aligning roller bearing can extend its life to 2-3 times that of the traditional bearing.Maintenance convenience: The automatic centering function of self-aligning roller bearings reduces the requirement for installation accuracy and simplifies the maintenance process.
. For example, in jaw crushers, there is no need to precisely adjust the coaxiality between the shaft and the bearing seat when replacing the self-aligning roller bearings, which reduces downtime.4. Improve equipment operating efficiency and stability
Shock absorption and noise reduction: Self aligning roller bearings reduce friction and vibration during operation and lower equipment noise by optimizing the internal structure (such as the design of the retaining ring and improved lubrication of the roller end face).
. For example, in the screening machine, the damping effect of the self-aligning roller bearing can reduce the vibration amplitude of the equipment by 20% -30%, and improve the screening efficiency. Energy saving effect: The low friction coefficient design reduces energy loss during bearing operation. For example, in woodworking machinery, the friction coefficient of self-aligning roller bearings is 15% -20% lower than that of ordinary bearings, which can significantly reduce energy consumption.Stability improvement: By compensating for shaft deflection and bearing impact loads, self-aligning roller bearings reduce sudden shutdowns caused by bearing failures and improve production continuity.
. For example, in the mine crushing production line, the stability of the self-aligning roller bearing can improve the overall equipment efficiency (OEE) by 5% -10%.