Large Slewing Ring Bearing

1.Large Slewing Ring Bearing Quality

In short, if you have to distinguish from the selection, quality reliability and high standards of slewing ring bearings, you can refer to the following:

1. Material

2. Heat treatment

3. Clearance, runout, tooth jump

4. Comprehensive indicators, roughness, grinding, depth of hardness layer, flaw detection

5. The reference life value of similar slewing ring bearing operation

The quality inspection of slewing bearing bearings can be divided into axial clearance and radial clearance according to different detection methods. important items to check. From the perspective of bearing application, clearance is an important indicator for detection.

Whether the bearing can obtain more satisfactory performance largely determines its radial clearance.
The specific tests are as follows: the high-frequency quenching hardness of the bearing surface should not be lower than 55HRC, the depth of the hardened layer should not be lower than 4mm, and the width of the soft belt should not be lower than 50mm.

There are certain requirements for the quenching time and temperature of the support slewing ring bearing for tempering processing. Under normal circumstances, it needs to be quenched at a temperature of 200 degrees, so as to ensure that the stress is completely eliminated.

In addition, the most important thing is grinding. It is necessary to select a suitable grinding wheel to complete the grinding, and strictly control the linear speed to avoid raceway burns. Then for fine grinding, it is necessary to choose a resin grinding wheel with a particle size of 46° or 60° for grinding.

The grinding amount cannot exceed the rough grinding process, and the finish must meet the requirements of the specified grade. For the support slewing ring bearing containing gears, the gear hobbing process is required after the grinding process. The requirements of the whole process are very strict, and the precision must exceed eight.

2.Maintenance of slewing ring bearing

The difference and connection between the maintenance and repair of heavy equipment bearings and the replacement of new bearings are not only related to the cost of slewing ring bearings, but also related to the value of slewing ring bearing maintenance, repair and repair.

In short, more maintenance on weekdays will double the lifespan. Repair will increase the expected life of the slewing ring bearing. Maintenance is equivalent to remanufacturing, and the lifespan of a new bearing is the same. Replacing a new bearing is based on the parameters and process of the old bearing. Manufacturing a new set of bearings is the most expensive.

Of course, as a manager of equipment procurement, maintenance and maintenance, it is very important to plan and plan the state of the bearing in advance, to ensure that each stage is controllable and to minimize losses. Also make sure that the device does not lie down.