CA copper insulated self-aligning roller bearing is a type of rolling bearing with self-aligning function. Its working principle is based on internal structural design and material characteristics, and it can withstand radial loads and bidirectional axial loads, while automatically adjusting the angle error between the shaft and the bearing seat or the deflection of the shaft. The following is a detailed analysis of its working principle:
1. Structural composition and cardiac function
Outer and inner ring design: The outer ring has a spherical raceway, and the center of the raceway is aligned with the center of the bearing, forming a self-aligning function.
The inner ring has two raceways that are inclined at a certain angle to the bearing axis, and the rollers are in line contact with the raceways.
Roller and cage: Two rows of symmetrical spherical rollers are used, and the roller generatrix is curved, which has a high degree of conformity with the inner and outer raceways.
The retaining frame is a brass solid retaining frame, with an outer guide double half solid design and a spherical outer diameter surface, effectively solving the impact problem of load on the retaining frame.
2. Automatic centering principle
Angle error compensation:
When the shaft is subjected to force bending or installation is not concentric, the spherical outer raceway of the bearing allows a certain angle deviation (usually 1 °~2.5 °), which is automatically adjusted to adapt to the angle error between the shaft and the bearing seat.
Axial load distribution: There are blocking edges on both sides of the inner ring, and there is a movable middle retaining ring between the two rows of rollers. The middle retaining ring can move axially when the bearing is running.
When subjected to axial load, the middle retaining ring adjusts the load on the two rows of rollers to evenly distribute the load and avoid stress concentration.
3. Load bearing capacity
Radial and axial loads: Spherical roller bearings mainly bear radial loads and can also withstand bidirectional axial loads.
Due to its self-aligning performance, it is suitable for heavy load and impact vibration load conditions, such as vibration, rollers, and pile drivers.
Impact resistance: CA type bearings use brass solid retainers and reinforced symmetrical rollers, which have high impact resistance.
3. Lubrication and operating conditions
Lubrication performance: To improve lubrication, the outer ring of the bearing can be equipped with an annular oil groove and drilled with evenly distributed oil holes (later code W33).
The selection and supply of lubricants are crucial for the service life and performance of bearings.
Operating conditions: The allowable angle deviation is 1 ° to 2.5 °. If a sealing device is installed, the centering performance may decrease.
The working speed is relatively low, and the appropriate bearing model needs to be selected according to the specific working conditions.
4. Materials and Manufacturing Processes
Retaining frame material: Made of brass solid retaining frame, with good strength and wear resistance, suitable for high-speed and heavy-duty working conditions.
Roller and raceway: The roller is a spherical roller that forms a linear contact with the raceway and can withstand large radial and axial loads.
The surface of the raceway is precision machined to ensure a good fit with the rollers, reducing friction and wear.
5. Application advantages
Suitable for harsh working conditions: Suitable for vibration, impact, and heavy load environments, such as mining, construction machinery, and other fields.
Self centering performance: automatically adjusts angle error, reduces additional stress caused by improper installation or shaft deflection, and extends the service life of bearings.
Easy to maintain: compact structure, easy to install and disassemble, suitable for equipment that requires frequent maintenance.
summarize
CA copper insulated self-aligning roller bearings can operate stably under complex working conditions through their unique self-aligning function and structural design. Its core working principle includes:
Self centering function: automatically adjusts the angle error to adapt to the deviation between the shaft and the bearing seat.
Load bearing: capable of withstanding radial and bidirectional axial loads, suitable for heavy loads and impact conditions.
Materials and Lubrication: Brass retainers and optimized lubrication design enhance the reliability and lifespan of bearings.
This type of bearing has significant advantages in situations that require high load-bearing capacity and self-aligning performance, and is one of the key components in industrial equipment.