roller bearing slewing ring china

Assembly process and detailed steps of slewing ring

Correct placement of internal and peripheral. First, lay the external cause flat on the workbench, put it into the lower half of the inner trap, and try to make the outer raceway correspond to the internal channel.

Correct placement of rollers and spacers. Put the selected cylindrical rollers and circular spacer blocks along the road. When placing adjacent cylindrical rollers, their axes are perpendicular to each other, and the two rollers are separated by a spacer block.

Gently and evenly run the appropriate grease onto the raceway. Fill the gap between the roll and the spacer block. The number of rollers and spacer blocks is generally equal, and the cylindrical dredger and spacer block should be close to each other。

If there is a gap between the roller and the spacer block at the last position, the thickness of one or two spacer blocks can be adjusted to make up for it. gap.

Install screws or bolts. Tighten the two diametrically opposite mounting bolts 1-2 turns while turning the other integral ferrule to prevent the rollers from getting stuck in place.

Then twist two symmetrical studs 180 apart, and so on, until all bolts are torqued to the specified torque value. When tightening the bolts, make sure the tabs are not in place, and preferably use a dynamometer wrench so that the bolts get the specified pre-tightening torque.

Adjust the no-load slewing ring resistance torque of the support. It may be difficult to turn the turntable bearing ring due to the preload. In the absence of other test equipment, a simple method can be used to test.

That is, a solid angle iron or steel pipe is used as a lever, which is stuck between two diametrically opposite bolts, and one end of the lever is pulled by a spring balance to make the imported bearing ring rotate, so as to be determined by the reading of the spring balance and the length of the lever.

Starting friction torque when the slewing ring is unloaded. The starting friction torque is determined in advance according to the preload of the slewing ring. If it still does not turn, it may be that the roller is stuck. At this time, the bolts should be loosened until the sleeve can be rotated, and then the bolts should be tightened.

Install the adjusting shims Install the adjusting shims above the mounting bolt holes, and the thickness of each group of adjusting shims should be equal.

Put the top half of the inner ring on, be careful at this time, do not move the adjustment tab. The starting friction moment under preload can be verified by the method of lever and spring balance described above.

The actual short turn is equal to the product of the load value indicated on the spring balance and the vertical distance from the spring balance to the center of rotation.

If the torque is too small, disassemble the slewing ring if necessary, and take out some adjustment pieces of equal thickness from each group of adjustment pieces. This procedure may be repeated many times until the China LYMC slewing ring obtains a suitable preload.

The threaded part of bolts and screws should be coated with anti-loosening glue. The lip seal is installed, and the lip seal has an overall annular shape, or it is formed by rolling the long material into an annular shape.