Asia United Machinery CO.,LTD

Slewing bearing

2018-06-08 16:41:38

The slewing bearing is a large-sized bearing with a special structure capable of simultaneously supporting a large axial load, a radial load, and an overturning moment, and a combination of functions such as support, rotation, transmission, and fixation. Under normal circumstances, the slewing bearing itself has mounting holes, lubricating oil and sealing devices, which can meet the different needs of various types of mainframes under various working conditions; on the other hand, the slewing bearing itself has a compact structure, guide rotation Easy to use, easy to install and easy to maintain, it is widely used in large-scale rotary devices such as cranes, mining machines, construction machinery, port machinery, wind power generation, medical equipment, radar and missile launchers.
Rotor bearing code representation
The composition of the code
The bearing code consists of a basic code and a post code.
The composition of the basic code
The basic code is divided into three parts, the front part is the type of construction and transmission type code, the middle part is the diameter of the rolling element (the bearing of the two or more rows of rolling elements is the maximum rolling element diameter), and the rear part is the diameter of the rolling center of gravity (for two rows The above rolling bearing is the maximum rolling center of gravity diameter)
1, the type of construction code according to the rules of Table 1.
01 Four-point contact ball bearings; 02 Double-reduction ball bearings; 11 Cylindrical roller bearings; 13 Three-row cylindrical roller bearings.
2, transmission type code according to the rules of Table 2.
0 No teeth; 1 Smaller module of involute spur gear external teeth; 2 Larger module of involute spur gear external teeth; 3 Smaller module of involute spur gear internal teeth; 4 Involute spur gear Internal teeth larger modulus.
3, the basic code preparation rules
When the basic code is arranged, the construction type code and drive type code are written together, and the front, middle and back are separated by “.”.
In general, 50Mn is used for turntable bearing rings, but 42CrMo is sometimes used to meet the requirements of special applications. Rolling body is generally selected GCr15SiMn. The types of retainers include integral, segmented, and isolated block types. Integral or segmented retainers use 20# steel or ZL102 cast aluminum alloys. The isolation block retainer uses polyamide 1010 resin, ZL102 cast aluminum alloy or QA110-3-1.5 aluminum bronze. Sealing ring material: oil-resistant rubber, fluorine-containing rubber, oil-resistant nitrile rubber.
Slewing bearing structure commonly used single row, double row four point contact ball slewing bearing, double row angular contact thrust ball slewing bearing, cross cylindrical roller and crossed tapered roller slewing bearing, three row cylindrical roller slewing bearing, ball Columns, such as hybrid turntable bearings, come in different configurations. The above-mentioned types of bearings are divided into different structures such as non-toothed, external-toothed, and internal-toothed, depending on whether or not they are provided with teeth and gears.