Installation of three-row cylindrical roller slewing rings

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 three-row cylindrical roller slewing rings

High bearing capacity: due to the presence of three rows of cylindrical rollers, and each row of rollers bears loads in different directions, the three-row cylindrical roller slewing ring can bear large axial force, radial force and overturning moment at the same time, and the bearing capacity is higher than that of other types of slewing rings.

Good rigidity: The structural design of the three-row cylindrical rollers makes it have high rigidity, which can effectively reduce the deformation of the slewing ring when bearing the load, ensure the slewing accuracy and stability of the equipment, and is especially suitable for large mechanical equipment with high precision requirements.

Smooth operation: the cylindrical roller and the raceway are in line contact, the contact area is large, and the rolling friction is small, so the three-row cylindrical roller slewing ring is more stable in the operation process, the noise is low, the vibration is small, and the work efficiency and reliability of the equipment can be improved.

Long life: high bearing capacity, good rigidity and smooth operation, so that the three-row cylindrical roller slewing ring has a long service life under normal use conditions, reducing the maintenance and replacement cost of the equipment.

Compact structure: Under the same load capacity, the axial and radial dimensions of the three-row cylindrical roller slewing ring are relatively small and compact, which can make the design of the host equipment more compact and save installation space.

Installation of three-row cylindrical roller slewing rings

The installation steps of the three-row cylindrical roller slewing ring are as follows:

Preparation before installation

Check whether the model and specification of the slewing ring are consistent with the design requirements, and whether there are defects such as damage and deformation in the appearance.

Prepare the tools needed for installation, such as cranes, wrenches, vernier calipers, feeler gauges, etc.

Clean the installation surface to ensure that the installation surface is flat and smooth, free of oil, burrs, impurities, etc., to ensure good contact between the slewing ring and the installation surface.

Conduct safety inspections on the installation site and set up necessary safety protection facilities to ensure the safety of the installation work.

Installation process

Positioning: According to the design requirements, the installation position line of the slewing ring is accurately drawn on the basis of installation, and the installation reference is determined.

Lifting: Use a suitable crane to lift the slewing ring smoothly, slowly move it above the installation position, and pay attention to avoid collision between the slewing ring and surrounding objects.

Preliminary Installation: Gently place the slewing ring on the mounting foundation so that its mounting holes are aligned with the bolt holes on the foundation. Then put on the bolt, but do not tighten the nut, leaving the slewing ring free for subsequent adjustments.

Adjust:

Use a spirit level to check the levelness of the slewing ring, and adjust it by inserting an appropriate gasket under the mounting surface, so that the levelness deviation of the slewing ring is controlled within the allowable range, and the general requirement is not more than 0.05mm/m.

Use vernier calipers or feeler gauges to check the gap between the inner and outer rings of the slewing ring and the mounting surface to ensure that the gap is uniform. If the gap is uneven, it needs to be adjusted until it meets the requirements.

Tighten the bolts: After the adjustment is completed, the connecting bolts are tightened symmetrically and gradually using a torque wrench according to the specified torque value. During the fastening process, the levelness and position of the slewing ring should be checked many times, and if there is any change, it should be adjusted in time.

Lubrication: After the installation of the slewing ring is completed, it should be lubricated in time. Inject an appropriate amount of grease into the raceway, generally using lithium-based grease, which has good lubrication performance and can adapt to different working environments. The amount of grease injected should be determined according to the specifications and usage requirements of the slewing ring, which is generally 1/3 - 1/2 of the raceway space.

Sealing installation: Install the sealing device of the slewing ring, such as sealing ring, sealing gasket, etc., to ensure good sealing and prevent grease leakage and external impurities from entering the inside of the slewing ring.

Check after installation

Check the levelness of the slewing ring again and the tightening of the bolts to ensure that the installation quality meets the requirements.

Manually rotate the slewing ring to check whether its rotation is flexible, and whether there are abnormal phenomena such as stagnation and abnormal noise.

Check whether there is oil leakage at the seal, and if there is leakage, the cause should be found and dealt with in time.

The installation of three-row cylindrical roller slewing rings needs to be operated in strict accordance with the installation requirements and steps to ensure the installation quality, so as to ensure that the slewing rings can work normally during use and prolong their service life.

Three Row Cylindrical Roller Slewing Bearing Supplier

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