slewing bearingIs a kind of can withstand the comprehensive load of large bearings. It is also called"Turntable bearing" because it is shaped like a plate. It can bear large axial load, radial load and overturning moment at the same time, and can replace the function of several sets of ordinary bearings. It is generally applicable to mechanical equipment that bears huge overturning moment and makes relative rotation. It is a combination bearing with high load carrying capacity.

　　slewing bearingThe diameter is generally0.4~10m, with mounting holes, internal or external gears, lubricating oil holes and sealing devices. It has the characteristics of compact structure, accurate and stable transmission, flexible rotation, long service life, simple installation, and convenient daily use and maintenance. According to different application requirements, the slewing bearing has a variety of structural forms to adapt to it, which can meet the functional requirements of different manufacturing accuracy levels of the host. Therefore, it can be widely used in lifting machinery, engineering machinery, metallurgical machinery, medical machinery, transportation machinery, food machinery, textile machinery, material processing machinery, military equipment, aerospace equipment, power generation equipment and other fields. It is an indispensable mechanical part of the mechanical rotary device.

　　slewing bearingDue to the influence of its own quality and external conditions, its carrying capacity, rotary accuracy and antifriction performance will change during use. When the performance index of the bearing is lower than the use requirement and cannot work, it is called bearing damage or failure. Once the turntable bearing damage and other accidents occur, the machine equipment will stop rotating and the function will be damaged.

Therefore, in a short time, investigate and deal with the cause and take corresponding measures.slewing bearingThe damage is much more complicated than the damage of general mechanical parts. Turntable bearing damage in various forms, complex reasons. In addition to the internal factors of bearing design and manufacture, the damage of the bearing is partly caused by external factors such as improper use, unreasonable support design, improper installation, poor lubrication, and poor sealing.

Slewing bearing installation points:

1) Before installation,slewing bearingThe base surface and the mounting surface of the bracket need to be cleaned to remove oil, burrs, paint and other foreign matter.

2) Roll to quenched soft belt (external mark "S" or hole blockage)slewing bearingShould be placed in the non-conforming area or irregular qualified area.

3) After the slewing bearing is hoisted in place, check the flatness of the mating surface with a feeler gauge. If there is a gap, it should be reprocessed,

If it cannot be handled, plastic filling or local gasket filling can be used to prevent the bracket from deforming after the bolt is tightened. Affect the performance of slewing bearing.

4) Before tightening the mounting bolts, adjust the backlash according to the highest point of the radial runout of the gear pitch circle (the three teeth marked with green). After tightening the bolts, check the backlash of all ring gears.

5) Tighten the bolts symmetrically and continuously in the 180 direction, and finally pass it again to ensure that the bolts on the circumference have the same pre-tightening force.