Pile drivers are personalized products and must be designed according to specific applications and usage requirements. The slewing bearing device, as an important component of the pile driver, has its overall strength and dynamic performance that can directly affect the working efficiency and safety factor of the entire foundation pile driver. Additionally, long-term statistical data show that 90% of early failures in slewing bearings are caused by broken teeth, primarily due to the design and selection not meeting the specific usage conditions. This article mainly researches the slewing bearing from the following aspects.

1. A dynamic model of the slewing bearing device was established using the torsional vibration model of gear pairs, and its dynamic performance was obtained through dynamic simulation analysis. We can perform precise analysis on the running speed of the slewing bearing's rotational angle and the meshing force of the gears, and then determine the preliminary design of the slewing shaft.

2. Based on virtual simulation technology, the impact of structural parameters such as gear modulus and tooth number on the dynamic performance of rotating gears was studied, and an optimized design and selection method for the rotating bearing device was proposed. This method analyzes the deficiencies in the dynamic simulation results of rotating gears, improving the dynamic performance of the rotating bearing device by changing structural parameters such as gear modulus and tooth number.

3. Based on the optimized model of the slewing bearing device, the dynamic simulation technology was used to study the impact of the slewing motor drive speed, gear clearance, and gear mesh stiffness coefficient on the dynamic performance of the slewing bearing device. Construction in different environments can have varying effects on the dynamic load of the foundation pile driver.

4. Finally, since it is difficult to know the specific parameters in limited tests, it is suggested to analyze the meshing characteristics of gears during the construction process of the slewing bearing. Research the specific factors related to whether the overall dynamic performance of the slewing bearing device directly affects the foundation pile driver, and propose a set of reasonable optimized design and selection methods for the slewing bearing. This ensures the design and selection of the slewing bearing are synchronized with the overall machine design, achieving personalized design of the slewing bearing using hydraulic pile drivers, and meeting the personalized design requirements of the entire machine.