A slew bearing is a type of rotary bearing that can support heavy loads and allow rotational movement. Slew bearings are often used in applications such as cranes, excavators, wind turbines, radar antennas, and medical equipment. There are different designs of slew bearings, depending on the load direction, load capacity, stiffness, friction, and gear requirements.
Most slew bearings have a gear integrated into one of the rings, either on the inner side of the inner ring or the outer side of the outer ring. The gear allows the rotation of the bearing to be driven by a motor or a hydraulic system. The gear can be external or internal, depending on the direction of rotation and the space available. Special gearing, such as helical and worm gears, are also possible for some applications.
Slew bearings are designed to meet the specific requirements of each application, such as load distribution, speed, accuracy, lubrication, sealing, corrosion protection, and service life. SKF and Liebherr are some of the leading producers of slew bearings in the world. They offer standard and customized slew bearings in various dimensions and designs. They also provide engineering services and support for slewing bearing selection, installation, maintenance, and remanufacturing.
Design requirements: This section specifies the design criteria and constraints for the slewing bearing, such as load direction, load capacity, speed, accuracy, stiffness, friction, gear type, lubrication, sealing, corrosion protection, service life, etc. It also defines the relevant standards and codes that need to be followed.
Design analysis: This section presents the theoretical and numerical analysis of the slewing bearing performance and behavior under different loading and operating conditions. It also includes the selection of the appropriate dimensions, materials, and components for the slewing bearing. It may use analytical methods, finite element methods, or other simulation tools to conduct the analysis.
Design verification: This section validates the design analysis results by comparing them with experimental data or empirical formulas. It also evaluates the design feasibility and reliability by conducting sensitivity analysis, risk analysis, or other methods.
Design optimization: This section optimizes the design parameters to achieve the best performance and efficiency of the slewing bearing. It may use optimization techniques such as genetic algorithms, gradient methods, or other methods to find the optimal solution.
Design drawings: This section provides the detailed drawings of the slewing bearing and its components. It shows the dimensions, tolerances, clearances, surface finishes, markings, etc. of each part. It also indicates the assembly sequence and instructions for the slewing bearing.