Rotary Bearing Structure And Sealing Form For Excavator

Excavator can rotate left and right in the work, cannot do without the rotary device, rotary bearing is an important part of the rotary mechanism. Excavator slewing drive is usually composed of worm, slewing support, shell, motor and other components.Because the core component adopts slewing support, it can bear axial force, radial force and overturning moment at the same time.

Excavator slewing bearing generally has mounting holes, internal or external gears, lubricating oil holes and sealing devices, so it can make the main engine design compact structure, simple guidance, easy maintenance, is a kind of transmission machinery that can bear the comprehensive load.

Because most of these bearings work under heavy load and low speed, the sealing type of slewing ring adopts two kinds of structure: rubber sealing ring sealing and labyrinth sealing.Rubber sealing ring seal itself has simple structure, small footprint, good sealing performance and reliability for a wide range of applications, but its deficiency is in the state of high temperature rubber sealing lip early aging and loss of sealing, so the work under the working conditions of high temperature of excavator slewing bearing appropriate USES labyrinth seal.

The sealing of the excavator slewing bearing is to prevent the outward leakage of the filled grease on the one hand, and to prevent the external dust, impurities and water from invading the bearing interior and affecting the normal work on the other hand.

As a typical rolling bearing, it is widely used for running at high speed or even very high speed. It is very durable.This kind of bearing has the advantages of small friction, high limit speed, simple structure, low cost and easy to achieve high manufacturing accuracy.