Application of detachable and interchangeable four-row cylindrical roller bearings in rolling mills

Jun 17, 2024

In the rolling industry, bearings are one of the key components to ensure efficient and stable operation of rolling mills. Among them, detachable and interchangeable four-row cylindrical roller bearings have been widely used in rolling mills due to their unique structure and performance advantages. This article will elaborate on the structural characteristics, working principle, application advantages, maintenance, and future development trends of the bearing.

Structural characteristics of detachable and interchangeable four-row cylindrical roller bearings

The detachable and interchangeable four-row cylindrical roller bearing is a multi-row roller bearing, which is mainly composed of an outer ring, an inner ring, four-row rollers, a cage, and a sealing device. Among them, the outer ring and the inner ring are respectively processed and heat treated by precision to ensure their high hardness and wear resistance; the four-row rollers are evenly distributed between the inner and outer rings to withstand the huge pressure and impact force from the rolling process; the cage is used to fix the position of the rollers to prevent them from colliding and rubbing against each other; the seal is used to prevent the leakage of lubricating oil and the intrusion of external impurities.

The biggest feature of this bearing is its detachable interchangeability. During the operation of the rolling mill, if a row of rollers is damaged or worn, it can be removed and replaced separately without replacing the entire bearing. This design not only reduces maintenance costs but also improves the operating efficiency of the rolling mill. FV bearings pay great attention to details, and the tolerance requirements of multi-row rollers are within a very small range to ensure that the multi-row rollers are evenly stressed and avoid stress concentration.

Working principle of detachable and interchangeable four-row cylindrical roller bearings

During the operation of the rolling mill, the detachable and interchangeable four-row cylindrical roller bearings mainly bear radial loads and axial loads from the rolls. When the rolls apply pressure to the bearings, the four-row rollers disperse the pressure to the inner and outer rings by rolling and sliding, thereby supporting and positioning the rolls. At the same time, the lubricating oil inside the bearing forms an oil film between the rollers and the cage, reducing friction resistance and reducing bearing wear and heat.

Advantages of Separable and Interchangeable Four-row Cylindrical Roller Bearings in Rolling Mills

1. High load capacity: Due to the design of four-row rollers, the bearing can withstand greater radial and axial loads, thus ensuring the stable operation of the rolling mill under high-speed and heavy-load conditions.

2. Long life: By optimizing the structural design of rollers and cages and using high-performance lubricants and sealing devices, the wear resistance and corrosion resistance of the bearing have been significantly improved, thereby extending the service life of the bearing.

3. Easy maintenance: Due to the separable interchangeability, when a row of rollers in the bearing is damaged or worn, it can be disassembled and replaced separately, reducing the difficulty and cost of maintenance.

4. High precision: Through precise machining and heat treatment processes, the inner and outer rings and rollers of the bearing have high dimensional accuracy and shape accuracy, thus ensuring the machining accuracy and product quality of the rolling mill.

5. Energy saving and environmental protection: With the optimized lubrication system and sealing device, the bearing can reduce the consumption and leakage of lubricating oil during operation, reducing environmental pollution and energy consumption.

The above picture shows the outer component R313822 and inner ring L313822 of the four-row cylindrical roller bearing produced by FV Bearing.

Maintenance of detachable and interchangeable four-row cylindrical roller bearings

In order to ensure the long-term stable operation of detachable and interchangeable four-row cylindrical roller bearings, regular maintenance is required. Specifically, it includes the following aspects:

1. Regularly replace lubricating oil: According to the working conditions of the rolling mill and the use of the bearing, regularly replace the lubricating oil to ensure that the lubrication condition inside the bearing is good.

2. Check the sealing device: Regularly check whether the sealing device of the bearing is intact to prevent lubricating oil leakage and external impurities from intrusion.

3. Check the rollers and cages: Regularly check whether the rollers and cages are damaged or worn, and replace them in time if necessary.

4. Clean the bearing surface: Regularly clean the oil and impurities on the bearing surface to keep it clean and dry.

Future development trend

With the continuous development of the rolling industry, the performance requirements for rolling mill bearings are getting higher and higher. In the future, the detachable and interchangeable four-row cylindrical roller bearings will develop towards higher load capacity, longer life, and lower maintenance costs. At the same time, with the application of new materials, new processes, and new technologies, the performance of the bearings will be further improved, providing more reliable support for the development of the rolling industry.