Four methods of installing excavator slewing bearings

Slewing ring is the most widely used part of machinery. It is indispensable in the whole set of equipment. It is widely used in entertainment facilities, ports and docks, and heavy machinery industries.

However, when disassembling and installing slewing ring, the disassembly rules must be followed. , Otherwise it is easy to cause damage; bring irreparable loss to users, the following editor will introduce the basic rules of slewing bearing disassembly and assembly.

The slewing bearing is closely connected with the equipment and tooling, so when disassembling and installing, The bearing and shaft can be removed from the bracketusing a press and a disassembly tool together . The specific disassembly process can refer to the following points .

1. The disassembly of the outer ring of the slewing ring: fix several outer ring extrusion screws around the outer ring, and then disassemble them after setting up the screws with equal force. These screw holes usually have blind plugs, tapered roller bearings and other separable bearings. Several cuts are set on the outer wall of the slewing ring. Use a press to unload the nylon spacer. The disassembly process is gently tapped to avoid damage to the slewing ring.
2. The disassembly of through-hole type slewing bearing : just pull it out directly with a press, pay attention to force the inner ring during operation, use hydraulic disassembly method for larger diameter slewing ring, The oil nozzle on the slewing ring applies oil pressure to make the slewing ring easier to pull out; Large inner and outer diameter slewing bearing drawing method and oil pressure method used at the same time, the disassembly effect is better. The roller-type slewing bearing inner ring can be disassembled by the heating expansion method. It is locally heated in a short time, and the inner ring of the slewing bearing thermally expands before being pulled out for disassembly.

3. Threaded hole type slewing ring disassembly method: disassemble the small threaded slewing ring, support the inner ring of the slewing ring with a stopper, twist the nut several times, and knock it off with a plastic hammer. For larger slewing bearings, it is recommended to use the oil pressure method, pressurize oil on the threaded slewing bearing oil hole, and then disassemble the inner ring after expansion. Note that during operation, the slewing bearing may come out. It is recommended to use the nut as a stop to avoid accidents.
4. Knock disassembly method: Knock disassembly is the simplest method of disassembling slewing bearings. It uses the side knocking force of a plastic hammer to cause the slewing bearings to be displaced and separated from each other. In the actual disassembly process, most of the disassembly methods are used. The preparatory work before disassembly is to add lubricating grease to the slewing ring connection and directly use a plastic hammer to disassemble; The normal disassembly methods are the above four. After disassembly, the disassembled parts must be stored in a unified manner to prevent loss and reinstallation.