How to choose the appropriate slew plate bearing according to the slew plate bearing code number
Slewing bearings refer to large bearings that can withstand relatively large steering loads, radial loads, overturning moments and other comprehensive loads, and can maintain multiple functions such as rotation, transmission and fixation. Slewing bearings are generally equipped with mounting holes, lubricating oil and sealing devices, and can be adjusted according to the needs of different mechanical equipment. They can meet the bearing needs under different conditions. They have the characteristics of compact structure and easy installation. They are widely used in machinery and equipment. On large rotating devices such as heavy transport machinery, excavators, construction machinery, wind power generation, and medical equipment.
1. Representation method of slew bearing code number
The code name of the slewing bearing consists of the basic code and the postcode. The basic code is divided into three parts. The front part is the structural type and transmission type code, the middle part is the rolling element diameter, and the rear part is the rolling body center circle diameter. Different codes represent different slew bearing types.
1. Structural type code
01 Four-point contact ball slewing bearing;
02 Double row reducing ball slewing bearings;
11 Penetrated cylindrical roller slewing bearings;
13 Three rows of cylindrical roller matching slewing bearings.
2. Transmission type code
0 toothless type;
1. The smaller module of the external teeth of the involute cylindrical gear;
2 The larger module of the external teeth of the involute cylindrical gear;
3. The internal teeth of the involute cylindrical gear have a smaller module;
4. The internal teeth of involute cylindrical gears have a larger module.
3. Basic code compilation rules
When arranging the basic code, the structure type code and transmission type code are written consecutively, and the front, middle and rear parts are separated by "."
2. Select the slew plate bearing according to the slew plate bearing code number
Different slew plate bearing codes represent different slew plate bearings. When selecting, you should use the code names to distinguish what kind of structures and functions different slew plate bearings have and which fields they are suitable for use. Below, I will list several code names to introduce the differences. The functions and applications of slewing bearings.
1.01 four-point contact ball bearing
Four-point contact ball bearing is a kind of separable bearing, which is a set of angular contact ball bearings that can bear bidirectional axial load. The inner and outer ring raceways are peach-shaped cross-sections. When there is no load or pure radial load, the steel ball and the ferrule present four-point contact. It is generally suitable for those with pure axial load or large axial load. In the case of two-point contact under the combined load, the four-point contact ball bearing has a high limit speed and is also suitable for those high-speed operation situations.
2.02 double row reducing ball bearings
The double-row ball slewing bearing has three seat rings. The steel balls and isolation blocks can be directly discharged into the upper and lower raceways. According to the stress conditions, the upper and lower rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The load-bearing angle of the upper and lower arc raceways is 75.
