Study on the thermal characteristics of rotary bearing

The friction heat of spindle bearings significantly influence the speed and the dynamic performance of the rotary bearing unit, is restricting the main factors to improve the machining efficiency and precision.
To build up the heat transfer equations, the friction heat and temperature distribution calculation of bearing, thermal characteristics research of bearing, and its impact on the speed and dynamics is an important topic with theoretical
and practical significance.
In this paper, based on the heat transfer, tribology of agricultural bearings and rotor dynamics as the theoretical basis,taking the GDZ48A type electric spindle as an example, establishes the spindle bearing considering the effect of friction heat and pre tightening mode quasi dynamics analysis model, analyzes the bearing friction torque, motor, load and stiffness, study the influence of thermal characteristic, tower crane bearing design and application parameters on the speed and dynamics, and validated by experiments.

Crane bearing and the ship crane bearing technical characteristics comparison

• Harbour mobile crane bearing.

The three row roller slewing bearing of port crane usually use internal or external toothing diameter 4 meters, to withstand overturning moment is very high.

• Stacker reclaimer and rotary bearing

Slewing bearing stacker reclaimer used usually adopts ball column combined type, three rows ofroller type and cross roller type, diameter of 3 meters most super. 

  Because of the poor working environment, dust, this kind of bearing has high carrying capacity, long service life, good sealingperformance characteristics. Considering the design of seal, uses the double sealing, plus steel protection sealing solution.

• The  ferris wheel bearing of large slewing bearing

LYHY bearings are used for the four point contact ball slewing bearing the ferris wheel.

• Ship unloader rotary bearing

Slewing bearing ship unloader with external teeth usually adopts three rows of rollers in structure,about 4-6 meters in diameter.

• Engineering machinery rotary bearing

Rotary bearing the most widely used most, generally not more than 4 meters in diameter, structure based on four point contact ball.

• Tower crane bearing

Application of rotary bearing the most concise, also called slewing bearings, ball and roller are to.

• Ladle Turntable Bearing

• Shield machine bearing 

The slewing bearing the most top application. High safety, high reliability, high stability, high value.

• Radar bearing

Belongs to the military bearing, is not introduced, quality is the first.