Crane bearing and the ship crane bearing technical characteristics comparison

Slewing bearing is bearing the heavy industry is extremely important, diameter ranging from 10cm to 10 m, almost all of the large equipment to do reciprocating circular motion.

• Wind turbine slewing bearing

  Technical features: the yaw bearing is installed on the connecting part of the tower and cabin,variable paddle bearing installed in the root and the hub of each blade connecting parts. Each wind generator with a set of yaw bearing and three sets of variable pitch bearings. Yaw, pitch bearingmaterials selected 42CrMo, heat treatment using whole quenching and tempering treatment, the raceway surface quenching. The stress situation of yaw, pitch bearing complex, but also bear theshock and vibration is relatively large, therefore, requirements of bearing can bear the impact, but also can bear larger ship loader bearing.

  Wind turbine host life requirement of 20 years, the cost of installation and bearing large, therefore asked the yaw, pitch bearing life to reach 20 years. Bearing ring matrix hardness is 240-280HB,able to withstand shock and plastic deformation does not occur at the same time, the racewaysurface quenching hardness reaches 55-62HRC, which can increase the contact fatigue life, so as to ensure the long life of use requirements of bearing.

• The ship crane slewing bearing

The crane load bearing requirements of large, flexible rotation, relatively high speed, rotation of 270 degrees, the action to be fast, so the selection of internal tooth, double row ball slewing bearings. Crane bearing and the ship crane bearing technical characteristics comparison

•  Offshore platform crane bearing

According to the requirement of the bearing capacity of different, offshore platform crane often use four point contact ball slewing and the three row roller slewing bearing inner tooth.

Slewing bearing used in the offshore platform crane requires special material, the mechanical properties of the material to be able to ensure the safety coefficient of limit load, forging samplingCharpy impact experiment can achieve the average value of 42 J@-20 degrees C or 27J @ -40 C.Bearing finished product to Norske Veritas certification CCS.