Slewing bearingIt 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 rotating solution at low speed and light load. The two single row and double row designs, and the convenience of pre-drilled mounting holes.
In real life of slewing bearing, the difference in the cold blanking component can be controlled at 1%, the collapse depth is 0.5mm, the end face skew is less than 2°30, and the hot blanking component difference is within 2%, and the end face is skewed The degree is less than 3°. The restraint of the shearing die means that the warping of the bar, the axial movement and the flattening of the slit are restricted by the method of radial rush. Some of this method only rushes at the fixed knife end, and some rushes at both the fixed knife end and the movable knife end. The tightening method includes cylinder type and mechanism linkage.
Since most slewing bearings work under heavy load and low speed, the sealing type of the bearing selects two structures: rubber seal ring seal and labyrinth seal. The rubber seal ring seal itself has a simple structure. It has been widely used because of its small space occupation and reliable sealing performance. However, its shortcoming is that the rubber sealing lip is prone to early ageing and loss of sealing performance at high temperatures. Therefore, slewing bearings that work under high temperature conditions are suitable Use labyrinth seal.
The slewing bearing is a representative rolling bearing with a wide range of applications. It is used for high-speed or even extremely high-speed operation. This type of bearing has low friction, high limit speed, simple structure, low cost, and easy to achieve high production accuracy.
The slewing ring bearing also has a certain degree of self-aligning ability. When the housing hole is skewed by 10 degrees, it still works normally, but it will definitely affect the life of the bearing. Slewing ring bearing cages are mostly stamped steel plate corrugated cages, and large-scale bearings mostly use car-made metal solid cages. The seal of the slewing ring bearing is to prevent the filled grease from leaking out, and on the other hand, to prevent dust, impurities and moisture from entering the bearing and affecting normal operation.
