Influence of rotational inertia on the slewing drive transmission performance

The performance of the gear slewing drives designed and developed by U-TRSM is often affected by various external conditions. At the beginning of the design, we need to constantly communicate with the customer, have an overall and comprehensive understanding of the working conditions used by the customer, and design a high-quality solution for the customer. In this article, we would like to briefly talk about the influence of rotational inertia on the slewing drive, in order to facilitate customers to have a better reference in the selection of slewing drive.

The rotational inertia is a measure of the inertia of a rigid body as it rotates around an axis, and directly affects the dynamic performance of the gears in the slewing drive during meshing. During gear meshing, the size of the rotational inertia determines the response speed of the gear system to external torque, thus affecting the smoothness and accuracy of the transmission, a large moment of inertia may result in a sluggish system response and reduced transmission efficiency, while a smaller moment of inertia helps to improve the dynamic response of the system and transmission efficiency.

The moment of inertia also affects the vibration and noise of the gear meshing process in the slewing drive. In transmission chain torsional vibration analysis, the rotational inertia determines the vibration shape, which has an important influence on the vibration characteristics of the system, and the appropriate rotational inertia helps to reduce vibration and noise, and improve the smoothness and comfort of the gear transmission.

The size of the rotational inertia is closely related to the transmission efficiency of the gear mesh, the efficiency of gear transmission is affected by a variety of factors, and the rotational inertia is one of the important factors, reducing the rotational inertia can improve efficiency and reduce energy loss. The rotational inertia of the gear system can be effectively reduced by optimising the design of the gear pair, reducing the mass and geometry of the shaft and box, etc., thus improving the transmission efficiency of the slewing drive.

When considering emergency braking or transmission shocks, the additional loads generated by the rotational inertia, in addition to the shock loads, should not be ignored. The large moment of inertia may lead to large additional loads during emergency braking, causing shocks and damage to the gear transmission of the slewing drive.

Therefore, when designing and selecting the gearing system, the design engineers of U-TRSM will fully consider the influence of the rotational inertia, and reduce the rotational inertia by optimising the design and selecting the materials, etc. to improve the overall performance of the slewing drive and provide customers with better quality solutions.