CA copper insulated self-aligning roller bearings (i.e. CA type self-aligning roller bearings) use an integrated brass machined cage, which has self-lubricating performance and certain plastic deformation ability. Its core function is to withstand high radial loads and bidirectional axial loads, while compensating for installation errors through self-aligning performance. It is suitable for industrial scenarios with heavy loads, vibrations, and high noise requirements. The following analysis will be conducted from three aspects: structural characteristics, performance advantages, and application scenarios:
1. Structural characteristics lay the foundation for core functions
Cage design
CA type bearings use integrated brass machined cages. Compared with stamped steel cages (such as CC type), brass material has higher tensile strength and self-lubricating properties, which can reduce friction heating and extend bearing life. At the same time, the retaining frame allows for certain plastic deformation and can adapt to deformation requirements under heavy loads or impact loads.
Roller and Inner Ring Structure
The roller is symmetrical, with no middle stop edge on the inner ring and two small stop edges on the end face.
. This design increases the contact area between the roller and the raceway, disperses the load more evenly, and enhances the radial load-bearing capacity.The inner ring has no middle stop edge but a small stop edge on the end face, which ensures the stability of roller operation and reduces internal space occupation, providing conditions for optimizing roller size.
. Alignment PerformanceThe outer raceway is spherical, and the inner raceway is inclined at a certain angle to the axis, giving the bearing automatic alignment capability (alignment angle 1 °~2.5 °).
. When the shaft is subjected to force bending or installed with different concentricity, the bearing can still work normally and compensate for coaxiality errors.II. Performance Advantages Support Application Scenarios
High Radial Load Capacity
CA type bearings can withstand large radial loads by optimizing the contact between rollers and raceways, making them suitable for heavy-duty equipment such as rolling mill rollers and crushers.
. Its rated load is usually increased by 20% to 30% compared to standard bearings.Bi directional axial load bearing
In addition to radial loads, CA type bearings can also withstand bi-directional axial loads, but cannot withstand pure axial loads.
. This feature makes it suitable for scenarios that require simultaneous radial and axial forces, such as continuous casting equipment and textile machinery.Low noise and self-lubricating
Brass retainer reduces friction and operational noise, suitable for noise sensitive environments such as household appliances and precision instruments.
. Meanwhile, the self-lubricating performance reduces the consumption of lubricating grease and lowers maintenance costs.Alignment compensation error
In situations where installation errors or shaft deflection cause angle errors (such as railway vehicle axles and vibrating screens), the alignment performance of CA type bearings can ensure stable operation of the equipment and avoid early failure caused by poor alignment.
.III. Typical Application Scenarios
Heavy duty industrial equipment
Bearing seat of rolling mill gearbox: withstands the huge radial load generated by rolling force, while compensating for shaft deformation.
.Crusher: During the ore crushing process, it bears impact loads, and the plastic deformation capacity of the brass cage can absorb the impact.
.Vibration and impact environment
Vibration screen: Under high-frequency vibration, the centering performance compensates for the deformation of the screen body and maintains the stable operation of the bearings.
.Continuous casting equipment: It can withstand the thermal and mechanical stresses during the solidification process of molten steel, and the high temperature resistance of brass retainers is better than that of plastic retainers.
.For noise sensitive scenarios
Textile machinery: reduce operating noise and avoid fiber entanglement.
. Home appliances such as washing machines and air conditioners enhance the user experience.Large equipment matching
Wind turbine: It can withstand complex loads generated by wind loads in the variable pitch system, and its centering performance can adapt to tower vibration.
.Coal mill: During the coal crushing process, it can withstand heavy loads and dust erosion. The corrosion resistance of brass retaining frames is better than that of steel retaining frames.
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