Vibration screen self-aligning roller bearings are designed for high load and strong vibration conditions, with core advantages such as strong load-bearing capacity, excellent self-aligning performance, impact and high temperature resistance, stable and reliable operation, easy maintenance, and adaptability to complex working conditions. Specifically, they are as follows:
1. Structural advantages: high load-bearing and self-aligning capacity
Double row roller design
Self aligning roller bearings use two rows of symmetrical drum shaped rollers, significantly improving radial load-bearing capacity and able to withstand high-intensity impact loads during vibration screen operation. The contact area between the roller and the raceway is large, the stress distribution is uniform, and local overload is avoided.
Self centering function
The outer raceway is designed as a spherical surface, and the inner ring and rollers can be freely adjusted to compensate for coaxiality deviation caused by installation errors or shaft deformation (error compensation angle usually reaches 1 ° -2.5 °).
. This characteristic is crucial in the long-term operation of vibrating screens, as it can prevent bearing jamming or early failure caused by shaft offset.Large clearance design
For the high-temperature working conditions of the vibrating screen, the self-aligning roller bearing adopts a large clearance (C3/C4 level). The reasonable value is determined by calculating the original clearance, tolerance fit, and temperature rise to avoid friction increase or jamming caused by thermal expansion.
.2. Material and process advantages: impact resistance and high temperature resistance
High strength material
The rolling elements and inner and outer rings are made of vacuum degassed bearing steel (such as GCr15SiMn), which has excellent fatigue resistance and can withstand the alternating load of frequent start stop of the vibrating screen.
. The retaining frame is made of machined brass or aluminum iron manganese bronze, which has high strength, good elasticity, and wear resistance increased by more than 30% compared to ordinary materials, and is suitable for eccentric load conditions.Precision manufacturing process
Rolling element size tolerance ≤ 0.002mm, surface ultra-fine treatment (smoothness Ra ≤ 0.2 μ m), reducing friction and wear.
. Strictly manufactured according to P6 dimensional tolerance and P5 operational tolerance, with extremely small inner and outer diameter tolerances to ensure stability during high-speed operation.III. Operating advantages: stability and low faults
Low noise and smoothness
Symmetrical roller structure reduces axial force during operation, reduces vibration and noise (operating noise is 5-10dB lower than ordinary bearings).
. At the same time, the integral cage design avoids the risk of roller scattering and improves reliability.Heat dissipation optimization
The outer ring is designed with lubrication grooves and oil holes, combined with an efficient lubrication system, to quickly dissipate frictional heat.
. Some models adopt a heat dissipation fin structure, which enables the bearing to operate stably under high temperature conditions (such as ambient temperature ≥ 50 ℃). Anti eccentricity abilityThe cage is guided by the outer ring edge to reduce dependence on the inner ring, adapt to the centrifugal force generated by the rotation of the eccentric block of the vibrating screen, and prevent the rollers from tilting or getting stuck.
.4. Maintenance advantages: simplicity and economy
Long life design
By optimizing the curvature radius of the raceway and the length of the rollers, the contact stress is reduced by more than 20%, and the service life is increased by 1.5-2 times compared to ordinary bearings.
. In heavy-duty scenarios such as mining vibrating screens, the typical lifespan can reach 8000-12000 hours.Maintainability
Modular design of the structure, supporting quick disassembly and replacement, reducing downtime.
. The lubrication system is compatible with both oil lubrication and grease lubrication, adapting to different working conditions. The grease lubrication model can have a single filling cycle of up to 6 months, reducing maintenance frequency.Fifth, Applicability
Heavy duty vibration equipment
Widely used in mining vibrating screens, vibrating mills, vibrating rollers, etc., it can withstand a single impact force of several tons.
.Adaptation to harsh environments
The sealing structure effectively blocks dust (with a protection level of IP65), and when combined with high-temperature resistant materials, it can operate stably in environments with humidity ≥ 85% and dust concentration ≥ 50mg/m ³.
.High speed compatibility
Some models have a 30% increase in maximum speed compared to ordinary self-aligning roller bearings, meeting the requirements of high-frequency vibrating screens (speed ≥ 1500r/min).
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