How to replace the sealing device of the three-row cylindrical roller slewing ring?

Overview of Three Row Cylindrical Roller Slewing Bearing

Three Row Cylindrical Roller Slewing Bearing is a type of bearing used in heavy machinery, particularly in cranes, excavators, and other large rotating equipment. The design of this bearing incorporates three rows of cylindrical rollers, which enhances its load-carrying capacity and provides better stability.

Features of Internal Gear Slewing Bearing

High Load Capacity:

The three-row design allows for the handling of a combination of axial, radial, and moment loads simultaneously. This significantly increases the load-bearing capacity compared to single-row slewing bearings.

Compact Structure:

Despite its high load-bearing capacity, the three-row cylindrical roller slewing bearing maintains a relatively compact structure, making it suitable for space-limited applications.

Optimized Load Distribution:

The three rows of rollers are arranged in a way that ensures a more even distribution of loads, which improves stability and helps in managing stress more efficiently.

Durability and Longevity:

The robust design of this bearing type allows it to withstand harsh operating conditions and heavy-duty applications, leading to an extended service life.

Superior Rotational Precision:

This bearing type ensures smooth and precise rotation, even under heavy loads, making it ideal for applications where high accuracy in movement is essential.

Self-aligning Capability:

The three-row design can accommodate some misalignment between the rotating and fixed components, offering greater tolerance for mechanical errors or deformations in the system.

Versatile Performance:

The bearing is capable of operating in both high-speed and low-speed environments, offering versatility in a variety of mechanical systems.

Enhanced Rigidity:

The multiple rows of cylindrical rollers provide excellent rigidity, which is important for applications requiring precise movement control and stability under varying loads.

How to replace the sealing device of the three-row cylindrical roller slewing ring?

The following are the general steps for the replacement of the three-row cylindrical roller slewing ring seal device:

Preparation

1. Confirm that the model and specification of the sealing device to be replaced match the slewing ring, and prepare the corresponding tools, such as wrenches, vernier calipers, special disassembly tools, etc.

2. Clean up the debris, dust and oil around the slewing ring and keep the working area clean and tidy.

3. Make sure the equipment is in a shutdown state, cut off the power supply, and set a warning sign to prevent accidental start-up.

Dismantle the old seal

1. According to the installation instructions or relevant technical information of the slewing ring, find the fixing bolts or snap rings and other connectors of the sealing device. Using appropriate tools, gradually loosen and remove these connectors.

2. For some sealing devices with embedded or interference fit, it may be necessary to use special removal tools, such as pullers, etc., to slowly pull the old sealing device out of the mounting groove or mating part of the slewing ring. During the disassembly process, care should be taken to avoid damaging the surface and installation parts of the slewing ring.

3. After taking out the old sealing device, carefully check whether the sealing surface of the slewing ring is worn or damaged by scratches, deformations, etc. If damaged, repair or replacement of the relevant parts will be required to ensure that the new seal will be able to be installed and working properly.

Install a new seal

1. Clean up the new sealing device, check whether there are defects in its appearance, and ensure that there is no damage or deformation of the sealing lip, sealing ring and other parts.

2. Apply an appropriate amount of grease or sealant evenly on the mounting surface of the sealing device and the mating part of the slewing ring to facilitate installation and improve sealing performance.

3. Put the new sealing device into the mounting groove or mating part of the slewing ring accurately to ensure that its installation position is correct and there is no deflection or distortion. For some sealing devices with dowel pins or slots, make sure that they fit accurately with the corresponding locating structure on the slewing ring.

4. Use a tool to gradually tighten the fixing bolts or mounting snap rings and other connectors of the sealing device to make it firmly installed. In the tightening process, it is necessary to operate in accordance with the specified torque value to avoid damage to the sealing device or poor sealing due to excessive or too small torque.

Inspection and commissioning

1. After the installation is completed, carefully check whether the installation of the sealing device is in place, and whether the contact between the sealing lip and the slewing ring is uniform and tight.

2. Manually rotate the slewing ring to observe whether the sealing device interferes with other components and whether the operation is stable. If there is any abnormality, it should be stopped in time to check and eliminate the fault.

3. Test run the slewing ring, and closely observe whether there is leakage in the sealing part during operation. If a leak is found, it should be stopped immediately to find the cause, which may be improper installation of the sealing device, damage to the sealing surface or other problems that need to be re-inspected and treated.

The method of replacing the three-row cylindrical roller slewing ring seal may vary depending on the model and construction. If you are unfamiliar with or unsure about the replacement process, it is recommended to refer to the operating manual of the equipment or consult a professional technician.

Three Row Cylindrical Roller Slewing Bearing Supplier

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