The slewing bearing is a medium-sized and large-sized bearing that can withstand a large load of a large axial load, radial load and overturning moment.
Under normal circumstances, the slewing bearing itself has mounting holes, lubricating oil holes and sealing devices, which can meet the different needs of various types of mainframes working under various working conditions; on the other hand, the slewing bearing itself has a compact structure and guide rotation. Convenient, easy to install and easy to maintain, it is widely used in large and medium-sized rotary devices such as lifting and transportation machinery, metallurgical machinery, mining machinery, construction machinery, port machinery and automated assembly lines.
According to different structural forms, PRS slewing bearings can be divided into four different types of contact ball slewing bearings, double row ball slewing bearings, cross cylindrical roller slewing bearings and three rows of cylindrical roller combination slewing bearings; Bearings are divided into different structures such as toothless, external gear and internal gear according to whether they are toothed or toothed. According to different structural characteristics, the slewing bearing can meet the requirements of the working host under various load conditions. Among them, the four-point contact ball slewing bearing has high dynamic load capacity, the cross cylindrical roller slewing bearing has high static load capacity, and the three-row cylindrical roller combined slewing bearing leads the bearing capacity to the height direction of the bearing. The various loads are respectively subjected to different raceways and roller sets, so that the bearing diameter can be greatly reduced under the same stress conditions, so that the main machine is more compact, and it is a high load capacity turntable. Bearing. Code designation of slewing bearing
First, the composition of the code The bearing code consists of the basic code and the post code.
Second, the basic code number The basic code is divided into three parts, the front part is the structure type and the transmission type code, the middle part is the rolling element diameter (the bearing is the largest rolling element diameter for the two rows of rolling elements), and the rear part is the rolling element center The diameter of the circle (the bearing diameter of the two-row rolling element is the maximum diameter of the center circle of the rolling element) 1. The structural type code is as specified in Table 1. 01 Four point contact ball bearing 02 Double row reducer ball bearing 11 Cross cylindrical roller bearing 13 Three row cylindrical roller combination bearing 2. The transmission type code is as specified in Table 2. 0 toothless type 1 involute cylindrical gear outer teeth smaller modulus 2 involute cylindrical gear outer teeth larger modulus 3 involute cylindrical gear internal teeth smaller modulus 4 involute cylindrical gear internal teeth larger When the basic code number of the modulo 3 basic code preparation rules is arranged, the structure type code and the drive type code are consecutively written, and the front, middle and rear parts are separated by ".