Sealed self-aligning roller bearing is a type of rolling bearing with special design and function, which plays an important role in mechanical transmission systems. Starting from its structural characteristics, its core function is analyzed in depth:
1. Self aligning function: compensates for shaft deflection
Principle of action:
The inner and outer raceway of self-aligning roller bearing is spherical, and the rollers are drum shaped, allowing the bearing to automatically adjust the angle when subjected to load, compensating for the deflection between the shaft and the bearing seat (usually up to 1 °~2.5 °).
Typical application scenarios: Long axis or cantilever axis: such as the roller shaft of paper machines and textile machinery, which may deviate due to its own weight or installation errors.
.Multi pivot system: such as the transmission shaft of large fans and conveyors, which may deform due to thermal expansion or load changes.
.Advantages:
Avoid stress concentration at the edge of the bearing caused by shaft deflection, extend bearing life, and reduce equipment vibration and noise.
.2. Sealing function: prevent pollutants from entering
Sealing structure:
Sealed self-aligning roller bearings are usually equipped with contact or non-contact sealing devices (such as rubber sealing rings, metal dust covers), effectively preventing pollutants such as dust, moisture, and metal shavings from entering the interior of the bearing.
. Typical application scenarios: harsh working conditions such as mining machinery, cement equipment, agricultural machinery, working environment with high dust and humidity. Difficult to maintain occasions: such as offshore platforms and wind turbines, which require long-term reliable operation due to high maintenance costs.Advantages:
Reduce grease leakage and external pollutant invasion, lower grease consumption and bearing wear, and extend maintenance cycles.
.3. Load bearing capacity: Suitable for heavy loads and impact loads
Structural features:
The self-aligning roller bearing adopts two rows of symmetrical rollers, and the rollers are in line contact with the raceway. The load bearing capacity is much higher than that of ball bearings, and it can withstand bidirectional axial loads and larger radial loads.
.Typical application scenario: Heavy load equipment such as crushers, vibrating screens, and steel mills, which need to withstand high impact loads.
. In low-speed and high torque situations, such as cranes and excavators, large torque needs to be transmitted at low speeds. Advantages: It can maintain stable operation even under heavy loads and impact loads, reducing the risk of bearing failure.4. Lubrication and maintenance: Simplify design and reduce maintenance costs
Lubrication method:
Sealed self-aligning roller bearings are usually pre filled with grease and do not require additional lubrication systems, making them suitable for situations that are difficult to maintain frequently.
.Maintenance cycle:
The sealing design extends the service life of the grease and reduces the frequency of grease replenishment and bearing replacement.
.Advantages:
Reduce maintenance costs, improve equipment availability, especially suitable for unmanned or remote monitoring systems.
.5. Application Cases: Typical Industries and Equipment
The role of sealed self-aligning roller bearings in typical industries
The deflection of compensating shafts in mining machinery crushers and ball mills can withstand heavy loads and impact loads, preventing dust from entering
The main shaft of wind turbines for wind power generation adapts to the deflection of the long shaft, reducing maintenance and extending service life
The deflection of compensating rollers in paper industry calenders and coilers ensures the stability of high-speed operation
Port machinery cranes and stackers can withstand heavy loads and impacts, reducing grease leakage and lowering maintenance costs
6. Summary: The core value of sealed self-aligning roller bearings
Reliability: The self-aligning function compensates for the deflection of the shaft, the sealing design prevents the invasion of pollutants, and ensures the long-term stable operation of the bearing under harsh working conditions.
. Economy: Reduce maintenance frequency and lubricant consumption, lower equipment downtime and maintenance costs. Adaptability: Suitable for heavy loads, impact loads, skewed shafts, and harsh environments, widely used in industries such as mining, wind power, and papermaking. Sealed self-aligning roller bearings provide a highly reliable and low-cost maintenance solution for mechanical transmission systems through their unique centering and sealing functions, and are essential key components in modern industrial equipment.