What is the basic structure of the slewing bearing?

The present social and economic rapid development in many large engineering construction process will be applied to the slewing bearing, mainly driven by rotary, mounting holes and sealing device, lubricating oil and other components, can withstand the axial force and radial force and overturning moment, from left to right into the outer ring, sealing tape, rolling body, along with a variety of plug, plug pin, the isolation piece or cage,It is widely used in many real-world industries.  This article will introduce what is the basic structure of the slewing bearing. 

Here are the main points of the article:

• The basic structure of slewing bearing

• The basic structure of single-row four-point contact ball slewing bearing

• The basic structure of double exclusion spherical slewing bearing

• The basic structure of single row cross roller slewing bearing

• The basic structure of three-row roller slewing bearing

• The basic structure of the lightweight series slewing bearing

• The basic structure of single-row four-point contact ball slewing bearing

• The basic structure of single row cross roller slewing bearing

1. The basic structure of slewing bearing

Slewing bearing usually consists of worm, shell, motor and other parts. Since the core component uses slewing bearing, it can bear axial force, radial force and tipping moment at the same time. Slewing bearing has many forms, but its structural composition is basically the same. 

From left and right are (the upper part) :

(1) Outer ring (toothed or toothless) 2.  Sealing belt 3.  Rolling body (ball or roller) 4.  Refueling nozzle

(2) From left and right are (the following part) :

(3) Plug 2.  Plug pin 3.  Inner ring (with or without teeth) 4.  Isolation block or cage 5.  Mounting hole (silk hole or light hole)

2. The basic structure of single-row four-point contact ball slewing bearing:

Single row four-point contact ball slewing bearing is composed of two seat rings, which are compact in structure and light in weight.  The steel ball is in contact with the circular track at four points, and it can bear axial force, radial force and tipping moment at the same time. Rotary conveyor, welding operators, small and medium-sized cranes and excavators and other construction machinery can be selected. 

3. The basic structure of double exclusion spherical slewing bearing:

The double volleyball slewing bearing has three seat rings, and the steel ball and the isolation block can be directly discharged into the upper and lower raceway.  According to the stress condition, the upper and lower two rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient.  The bearing Angle of the upper and lower arc-raceway is 90°, which can withstand great axial force and tipping moment. When the radial force is greater than 0. 1 times the axial force, the raceway shall be specially designed. The bearing axial and radial dimensions of the double displacement spherical slewing are large and the structure is tight. 

4. The basic structure of single row cross roller slewing bearing:

Single row cross roller slewing bearing, composed of two seat rings, compact structure, light weight, high manufacturing accuracy, small assembly gap, high requirements for installation accuracy, roller 1:1 cross arrangement, can bear the axial force, tipping moment and large radial force at the same time, is widely used for lifting and transportation, engineering machinery and military products. 

5. The basic structure of three-row roller slewing bearing:

The three-row roller slewing bearing has three rings, separated from the upper and lower raceway and the radial raceway, so that the load of each row of rollers can be determined with certainty. Can carry a variety of load at the same time, it is four kind of product in one of the biggest bearing capacity, axial and radial size is larger, firm structure, especially suitable for the requirements of large diameter heavy machinery, such as bucket wheel excavators, wheeled cranes, deck cranes, port cranes, molten steel operation platform, large tonnage crane machinery, etc. 

6. The basic structure of the lightweight series slewing bearing:

The structural form of the light slewing bearing is the same as that of the common slewing bearing, which is light in weight and flexible in rotation. 

7.  The basic structure of single-row four-point contact ball slewing bearing:

Single row four-point contact ball slewing bearing is composed of two seat rings.  The structure is compact and the steel ball is in contact with the circular track at four points. 

8. The basic structure of single row cross roller slewing bearing:

Single row cross roller slewing bearing is composed of two seat rings.  It has a compact structure, high manufacturing accuracy, small assembly clearance and high requirements for installation accuracy.  The rollers are in a 1:1 cross arrangement, which can bear axial force, tipping moment and large radial force at the same time. 

I hope the introduction of this article will help you understand slewing bearing. Our company specializes in producing all kinds of slewing bearing. If you need slewing bearing, please contact us.