What are the classifications of slewing bearings?

Slewing ring, also known as slewing bearing, is a large bearing that can bear large axial load, radial load and overturning moment at the same time. Slewing bearings are generally equipped with mounting holes, internal or external gears, lubricating oil holes and sealing devices, which can make the mainframe structure compact, reliable guidance, and convenient maintenance.

The slewing ring has four-point contact ball bearings without gears, external gears and internal gears, double-row angular contact ball bearings, crossed cylindrical roller bearings, crossed tapered roller bearings and three-row cylindrical roller combined bearings, etc. Kind of structure type. Among them, four-point contact ball bearings have higher static load capacity; crossed cylindrical roller bearings have higher dynamic load capacity; crossed tapered roller bearings have greater support rigidity and higher rotation through pre-interference energy. Accuracy.

Slewing bearings are widely used in large slewing devices such as hoisting machinery, mining machinery, construction machinery, port machinery, ship machinery, and high-precision radar machinery and missile launchers.

Slewing ring-single-row four-point contact ball slewing ring

The single-row four-point contact ball slewing ring is composed of two seat rings. It has a compact structure and light weight. The steel ball is in contact with the arc raceway at four points and can bear axial force, radial force and tilting moment at the same time. Rotary conveyor welding* manipulators can be selected for medium and small cranes and excavators.

Slewing ring-single-row cross roller slewing ring

The single-row four-point contact ball slewing ring consists of two seat rings, compact structure, light weight, four-point contact between the steel ball and the arc raceway, can bear axial force, radial force and tilting moment at the same time, rotary type Conveyors, welding* manipulators, small and medium cranes, excavators and other construction machinery can be selected.

Slewing ring-single-row cross roller slewing ring

The single-row cross roller slewing ring is composed of two seat rings, with compact structure and light weight. The manufacturing precision is high, the assembly gap is small, and the installation accuracy is high. The rollers are arranged in a 1:1 cross and can bear the axial direction at the same time. Forces, tipping moments and large radial forces are widely used in lifting and transportation, construction machinery and military products.

Slewing ring-single-row four-point contact ball slewing ring

The single-row four-point contact ball slewing ring consists of two seat rings, compact structure, light weight, four-point contact between the steel ball and the arc raceway, can bear axial force, radial force and tilting moment at the same time, rotary type Conveyors, welding* manipulators, small and medium cranes, excavators and other construction machinery can be selected.

Slewing ring-three-row roller slewing ring

The three-row roller slewing bearing has three separate races, the upper and lower and radial raceways, so that the load of each row of rollers can be accurately determined, and it can bear various loads at the same time. The larger one has larger axial and radial dimensions and a firm structure, which is especially suitable for heavy machinery requiring larger diameters, such as bucket wheel excavators, wheel cranes, marine cranes, ladle slewing and large-sized truck cranes, etc. Mechanically.

Slewing ring-double-row ball slewing ring

The double-row ball type slewing bearing has three seats, and the steel balls and spacers can be directly discharged into the upper and lower raceways. According to the force condition, 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 90°, which can bear great axial force and tilting moment. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. The double-row ball slewing bearing has relatively large axial and radial dimensions and a strong structure. It is especially suitable for loading and unloading machinery such as tower cranes and truck cranes that require medium or larger diameters.

Slewing ring-single-row cross roller slewing ring

Single-row cross-roller slewing ring, composed of two seat rings, compact structure, light weight, small assembly gap, high requirements for installation accuracy, the rollers are arranged in a 1:1 cross, which can bear axial force and tilt at the same time Torque and large radial force are widely used in lifting and transportation, construction machinery and military products.