Slewing bearing structure and sealed type

The slewing bearing is mainly composed of an upper ring, a lower ring and a full complement ball. The entire design of the slewing bearing is used for the rotating solution at low speed and light load. These two single-row and double-row designs and the convenience of pre-drilled mounting holes.

In actual life, the slewing bearing can control the weight difference of cold blanking at 1%, the crushing depth is 0.5mm, and the inclination of the end face is less than 2 ° 30. For the weight difference of hot blanking, the end face is inclined within 2% Degree is less than 3 °. Constrained shear dies, that is, radial warping, bar warpage, axial movement, and incision flattening are restricted. In this method, some are tightened only at the fixed knife end, and some are tightened at both the fixed knife end and the moving knife end. The tightening methods include cylinder type and mechanism linkage.

The slewing bearing is a representative rolling bearing and has a wide range of uses. It is used for high-speed or even high-speed operation and is very durable. This type of bearing has low friction, high limit speed, simple structure, low cost, and easy to achieve high manufacturing accuracy.

The slewing bearing also has a certain self-aligning ability. When it is inclined at 10 degrees relative to the housing hole, it still works normally, but it has a certain impact on the bearing life. The slewing bearing cages are mostly steel stamping wave-shaped cages, and the large-scale bearings mostly use car-made metal solid cages. The sealing of the slewing bearing is on the one hand to prevent the filled grease from leaking out, on the other hand to prevent the external dust, impurities and water from intruding into the bearing and affecting the normal operation

Since the slewing bearing is mostly operated under heavy load and low speed, the seal type of the bearing adopts two structures of rubber seal ring seal and labyrinth seal. The rubber seal type seal itself has a simple structure. Owing to the advantages of small space occupation and reliable sealing performance, it has been widely used, but its shortcoming is that the rubber sealing lip is prone to early aging and loses the sealability at high temperature, so the slewing bearing working under high temperature conditions is suitable Use labyrinth seal