Described in detail turntable bearing applications in various fields

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(1) wind turbines

The yaw bearing is installed in the junction of the tower and the cockpit pitch bearings installed in each blade root and hub joints. Each wind turbine with a yaw bearing and three sets of pitch bearings. Yaw, pitch bearing ring material se lection, 42CrMo, heat treatment to the overall quenching and tempering treatment, surface hardening of the raceway. Yaw, pitch bearing force is complicated, and withstand shock and vibration and therefore requires a bearing not only to absorb the shocks, but also bear a greater load. Wind turbines host life requirement of 20 years, bearing the cost of installation, thus requiring the yaw, pitch bearing life to attain 20 years. Bearing rings the matrix hardness of 240-280HB, able to withstand impact without plastic deformation, while the raceway surface quenching hardness reaches 55-62HRC, increase the contact fatigue life, thus ensuring the bearing of long-life use.china bearing company

(2) marine crane

Reducing ball marine cranes generally use double, four point contact ball, three-row roller slewing bearings of the tooth structure, depending on the carrying ca pacity of the three-row roller slewing bearings are usually used for heavy-duty cranes, four-point contact ball slewing and double Reducing ball slewing bearings for light crane.

Cranes in the -20 ° C-+45 ° C environment, the kind of bearing on the mechanical properties of materials are higher.

3 offshore platform cranes

According to the carrying capacity requirements of the offshore platform cranes typically use four-point contact ball slewing and three-row roller tooth turntable bearing.

Slewing bearings used in cranes on offshore platforms have a special material requirements, the mechanical properties of the material to be able to guarantee the safety factor in the limit load, forging sampling Charpy impact test average of 42J @ -20 ° C or 27J @ -40 ° C. Bearing finished Classification Society certification.

4 port mobile crane

Port cranes usually use teeth or tooth 4 m in diameter, three-r ow roller slewing bearings to withstand high overturning moment.

5 stacker and reclaimer

The stacker-reclaimer wheel bearings commonly used ball joint column type, three-row roller-type as well as cross-roller type, diameter, the majority of over three meters. Poor working conditions, dust, such bearings with high carrying capacity, long life, good sealing performance characteristics.

6 Ferris wheel

For the Ferris wheel on the four-point contact ball slewing bearing, the outer diameter of 4100mm, thickness 85mm

7 unloader

The ship unloader with the wheel bearings are usually three rows of outer tooth structure of the roller, the diameter of about 4 m.

8. Crane

The tower crane used in wheel bearings are usually small size four-point contact ball slewing bearing or dual volleyball turntable, not over 2 meters in diameter.roll bearings

9 radar antenna

Shortwave antenna generally with three-row roller structure of the wheel bearings, the rotation speed is slow.

10 shield machine

Shield machine with diameter of the wheel bearings from 2.5 meters to 6 meters, and some larger diameter, these bearings to work under very harsh conditions, bearing the load of big, strong corrosion resistance, short life.

11 Ladle Turret

Ladle turret slewing bearings are usually three-row roller structure, due to work under harsh conditions with dust and high temperature conditions, the cage, grease and sealed with high requirements.

12 Construction Machinery

Construction machinery, wheel bearings are usually small size four-point contact ball slewing bearing with a diameter not more than 2 m.bearing company