With such a fixing method as the gear shafting structure fixed by the external end cover, when the reducer leaves the factory, there will be a certain axial gap at both ends of the reducer to ensure the flexible operation of the bearing and the thermal extension of the shafting parts. long.This gap should not be too large, generally in the range of 0.25mm to 0.4mm. If this gap is not left, the rolling elements will be unevenly loaded, which will cause more serious axial movement, so adjustment is required. The clearance of the bearing ensures a certain axial clearance. When adjusting the shaft system of this fixed method, first open the observation hole of the reducer to check the meshing of the gears. After seeing the meshing of the gears, you can further determine the shafting. In which direction to move the gap, if you can determine the adjustment of the gap on the input side of the high-speed shaft, remove the blank cover of the high-speed shaft, and then use a depth vernier to measure the depth of the blank end bearing from the end cover plane and record it with After moving the shaft system with a crowbar tool, add a spacer equal to the amount of movement on the hole of the bearing, and then install the blank cover. After all the parts are assembled, gently rotate the reducer to check each Whether the shaft rotation is flexible, whether there is jamming phenomenon, if there is still jamming phenomenon, you can appropriately adjust the thickness of the added gasket, and keep adjusting the rotation of each axis of the reducer until it is flexible.
Sometimes the bearing end cover installed on the box body can be cut. The depth of cut is the movement of the bearing, or slightly greater than 0.20m of the movement of the bearing; if the depth of cut is greater than 1/3 of the plane thickness of the end cover, then If the end cap is too thin, the strength will be weakened, and the end cap needs to be reworked.
For centripetal thrust bearings with adjustable clearance, the required bearing clearance can be obtained by adjusting the relative position of the outer ring of the bearing. This clearance is small to ensure good rigidity of the bearing and reduce noise and vibration. .For bearings with non-adjustable clearance (such as radial ball bearings), you can adjust during assembly to leave a certain gap between the fixed end cover and the end surface of the outer ring of the bearing to allow the shaft to undergo thermal elongation.
When using the embedded end cover to adjust the bearing clearance of the bearing, the adjustment of the bearing clearance is mainly realized through the adjustment end cover of the reducer itself.There is no need to disassemble the parts of the reducer.The adjustment method of the worm bearing gap of the worm gear reducer adopts the bearing gap adjustment of the reducer with the embedded end cover. The bearing gap adjustment method of this reducer is very simple. When the reducer has been working for a period of time, the tapered roller The bearing clearance will increase with the increase of the equipment running time, which will cause the noise of the reducer to increase, and the vibration amplitude becomes larger. In severe cases, it may even cause damage to the bearings and gears of the reducer, resulting in the reducer being scrapped.In order to prevent this from happening, during the production process of the reducer, we must monitor the operation of the reducer equipment. During the production gap, we must stop the machine to adjust the bearing gap of the reducer. If the load on the output end can be discharged, the adjustment will be even better. Accurate. When adjusting, we use the adjusting bolts to adjust. After the adjustment is done, gently rotate the reducer to check whether the rotation of each axis is flexible and whether there is jamming. If there is, then adjust again, and you will get a better one slowly. The bearing clearance of the reducer until the rotation of each shaft of the reducer is adjusted to no obvious axial movement.