What Is Double Row Ball Slewing Bearing？

Many people see the term double row ball slewing bearing as a stranger. In fact, it has long been infiltrated into our lives and is widely used in all walks of life. As far as the mechanical aspects are concerned, you will find that there are shadows of double row ball bearing. This article will take you through the 2 row ball slewing bearing.

The following are the main points:

• Definition

• Application

• Features

1、Definition

The double row ball slewing bearing is widely used in the real industry. It is called “the joint of the machine”, which is a mechanical device that needs to perform relative rotary motion between two objects, and also needs to bear axial force, radial force and tilting moment. Important transmission components required. With the rapid development of the machinery industry, they have been widely used in marine equipment, engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and other industries.

2、Application

Double row ball slewing bearings are widely used. Engineering machinery is the most widely used place for it, such as earthmoving machinery, excavators, disintegration machines, stacker reclaimers, graders, road rollers, powerful boring machines, rock drilling machines, roadheaders, etc. Others include concrete machinery: concrete pump trucks, concrete mixing and distribution booms, belt conveyors, feeding machines: disc feeders, sand mixers; lifting machinery: wheeled cranes, crawler cranes, doors Seat cranes, tower cranes, forklifts, cranes, gantry cranes; ground-based processing machinery: impact reverse circulation drilling rigs, rotary drilling rigs, impact rotary drilling rigs, rotary drilling rigs, reverse circulation rotary drilling rigs, positive circulation Rotary drilling rig, long spiral engineering drilling rig, diving engineering drilling rig, static pressure pile machine, pile driver; engineering ship: dredger; special vehicle: bridge inspection vehicle, fire truck, window cleaning machine, flat beam truck, aerial work vehicle, Self-propelled aerial work platform; light industrial machinery: beverage machinery, blow molding machine, packaging machinery, filling machine, rotary bottle unscrambler, injection molding machine; marine crane: floating crane.

3、Features

The slewing bearing structure uses two rows of steel balls, and its carrying capacity is larger than that of a single row. They have a good safety factor and can withstand axial loads, radial loads and tilting moments. The double row ball turning ring has three seat ring, and the steel ball and the spacer block can be directly arranged in the upper and lower rims. According to the stress condition, two rows of upper and lower steel balls with different diameters are installed.

It has three races. The steel ball and the spacer block can be directly discharged into the upper and lower raceways. According to the force condition, two rows of steel balls with different diameters are arranged. This open assembly is very convenient, the upper and lower circular races have a bearing angle of 90° and can withstand large axial forces and tipping moments. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. It has large axial and radial dimensions and is structurally fastened. It is especially suitable for loading and unloading machines such as tower cranes and truck cranes that require medium and large diameters.

The slewing bearing has the least sensitivity to the manufacturing and installation accuracy and the axial and radial deformation of the frame. It is not easy to cause the contact between the oscillating body and the rolling edge, and a larger D/d ratio can be selected.

Double row ball slewing bearing is widely used, and its information can help us learn to use it and know which case to use the right bearing. Let the "joint of the machine" play its greatest use.