Precautions for the 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 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

Precautions for the installation of three-row cylindrical roller slewing rings

When installing the three-row cylindrical roller slewing ring, there are precautions in the preparation, installation process and after installation, and the following is a detailed introduction for you:

Preparation before installation

Check the integrity of the parts: Inspect the components of the slewing ring, including the inner ring, outer ring, rollers, cage, etc., to ensure that there is no damage, deformation or missing. At the same time, check that the mounting parts that match it, such as the mounting base, connecting flange, etc., should be flat and burr-free, and the dimensional accuracy should meet the design requirements.

Cleaning and lubrication: Thoroughly wash the mounting surface and rolling parts of the slewing ring with a clean cloth or solvent to remove oil, impurities and rust inhibitors. After cleaning, apply an appropriate amount of grease evenly to the raceway and roller surfaces to ensure good initial lubrication.

The main points of the installation process

Installation position and accuracy: The slewing ring should be installed on a flat and rigid foundation. Use measuring tools, such as levels, dial gauges, etc., to ensure that the levelness and flatness of the mounting base are within the specified range. When installing, the installation accuracy of the slewing ring should be strictly controlled, including radial runout, axial channeling, etc., and the radial runout is generally required to not exceed ±0.05mm, and the axial channeling does not exceed ±0.08mm.

Bolted connection: Use high-strength bolts that meet the design requirements for connection. When tightening the bolt, it should be operated in accordance with the specified torque and sequence, and the symmetrical cross mode should be gradually tightened to ensure that the slewing bearing is evenly stressed and avoid excessive local stress. After the bolt is tightened, an anti-loosening device, such as a spring washer, a stop gasket, etc., should be used to prevent the bolt from loosening.

Sealing installation: Properly install sealing devices, such as sealing rings, gaskets, etc., to prevent lubricating oil leakage and external impurities from entering the inside of the slewing ring. When installing the sealing ring, pay attention to its installation direction and position to ensure reliable sealing.

Post-installation inspection and commissioning

Visual inspection: After the installation is completed, check the appearance of the slewing ring again to ensure that all parts are installed in place and there is no loosening, deformation or damage. Check whether there are gaps or leakage oil stains at the seal, and deal with problems in time.

Rotational flexibility: Manually or with an appropriate drive device to turn the slewing ring to check whether it rotates flexibly and whether there is any stuckness, abnormal noise or abnormal resistance. If there is any abnormality, the cause should be investigated in time, which may be installation accuracy problems, foreign objects entering the raceway or component damage, etc.

Lubrication and maintenance: After the installation is completed, the slewing ring should be lubricated and maintained regularly according to the requirements of the equipment. Regularly check the oil level and quality of the lubricating oil, and replenish or replace the lubricating oil in time. At the same time, regularly clean the surface of the slewing ring from dust and impurities to keep it clean.

Application of three-row cylindrical roller slewing rings

Three-row cylindrical roller slewing rings are widely used in a variety of equipment and fields that need to withstand large loads and high-precision rotation, and the following are some of the main applications:

Construction machinery field

Cranes: Whether it is a truck crane, crawler crane or tower crane, three rows of cylindrical roller slewing rings are required at the slewing part of the boom. It is able to withstand the huge axial force, radial force and overturning moment generated by the crane when lifting heavy objects, ensuring that the boom can rotate smoothly and accurately to achieve accurate lifting of heavy objects.

Excavator: The upper turntable of the excavator and the lower walking mechanism are connected by a slewing bearing. The three-row cylindrical roller slewing ring enables the excavator's turntable to rotate flexibly, which is convenient for adjusting the working angle during excavation operations and bearing various complex loads generated during the excavation process.

Loader: When loading and unloading materials, the working device of the loader needs to rotate and pitch frequently. The three-row cylindrical roller slewing rings provide reliable support and flexible rotation for the loader's working device, ensuring the efficient operation of the operation.

Mining machinery field

Mining Excavators: Large mining excavators work in harsh mining environments and need to dig and load large quantities of ore. The three-row cylindrical roller slewing ring can withstand the huge excavation force and the weight of the ore, ensure the stable operation of the slewing mechanism of the excavator, and improve the excavation efficiency.

Open-pit mining cranes: In open-pit mines, cranes used for material handling and equipment installation need to have strong load-carrying capacity and stable slewing performance. Three-row cylindrical roller slewing rings meet these requirements and ensure that the crane works reliably in harsh mining conditions.

Metallurgical machinery field

Converter tilting mechanism: In the converter steelmaking process in a steel plant, the converter needs to tilt frequently for operations such as charging, steelmaking, and tapping. The three-row cylindrical roller slewing ring provides precise rotation and reliable support for the tilting of the converter, and ensures the stability and safety of the converter during the tilting process.

Continuous caster mold vibrating device: The continuous caster mold vibrating device requires high-precision vibration and rotation to ensure the quality of the casting billet. The three-row cylindrical roller slewing rings provide stable support and precise rotation for the mold vibrator, improving the surface quality and internal microstructure of the slab.

In the field of port machinery

Shore container crane: Shore container crane is a key piece of equipment for loading and unloading containers in ports, and its slewing mechanism needs to withstand huge loads and frequent movements. The three-row cylindrical roller slewing ring can ensure the smooth and fast rotation of the crane's slewing platform and realize the efficient loading and unloading of containers.

Port gantry cranes: Port gantry cranes are used for cargo handling and material handling in ports, and their boom systems require flexible slewing. The three-row cylindrical roller slewing ring provides reliable support and rotation for the boom of the portal crane, adapting to different operational needs.

Wind power generation

Wind turbines: Three rows of cylindrical roller slewing rings are usually used between the nacelle and the tower of the wind turbine. It allows the nacelle to rotate with the wind when the wind direction changes, so that the blades of the wind turbine are always at the optimal windward angle to improve the efficiency of wind energy capture. At the same time, slewing rings are subject to complex forces such as the weight of the nacelle and blades, as well as wind loads.

Three Row Cylindrical Roller Slewing Bearing Supplier

LTZC Bearings is a professional manufacturer specializing in three row cylindrical roller slewing bearings, other types of slew bearings, slew rings, slew drives and bearings parts. We are committed to supplying high quality and advanced three row cylindrical roller slewing bearings to global customers. If you are seeking reliable three row cylindrical roller slewing bearings for your project, feel free to get in touch with us.