Encountered in the process of planetary gear reducer bearing installation using anomaly

Reducer due to the need of structure design for vertical installation, under normal circumstances, the import of reducer with small volume, in order to cooling requirements, through the heat capacity of the check, usually need to add unpowered fan at high speed shaft. In addition, the speed reducer in order to prevent the lower shaft extension direction of the oil, using combined sealing seal way, namely the skeleton seal and labyrinth seal, this is imported reducer is different from the domestic normal speed reducer in original model. It is worth noting that the output shaft of the reducer on the axial force and radial force problem, because of the speed reducer output shaft with bearings is in accordance with the normal installation, bearing accept external forces there is a limit. When have larger external forces, according to the axial force and radial force, redesign reducer bearing structure choice. , the scale of the application of planetary gear reducer is very wide, in the process of we use occasionally encountered anomalies, China drive union for one such as below, for example: planetary gear reducer main body by a motor and drive, compact structure, small volume, has the outer characteristic of dc motor without brush touch. Mechanical structure consisting of So when bearing appear too tightly has the following factors: 1, because the planetary gear reducer tight cooperation, bearing heating, have been pushed out to make the grease, bearing the runway local no lubricating oil, bearing and bearing failure due to overheating. 2, operator afraid of car waste bearing chamber, planetary gear deceleration machine stoppage time to make the bearing outer ring and the end cover is suitable for cooperation and service. Focus on using the lower limit of scale of public servants to cars to the limit, so makes the bearing chamber diameter smaller, increases the amount of interference in collaboration with the bearing outer ring. 3, in order to further understand the shortcomings of planetary gear reducer running, conditional when can do a check experiment before disassembly. The seal in order to work in is very dusty environment of special design of the reducer, a series of seal together ( Radial seal, the layered, add lubrication grease of labyrinth seal) In order to prevent dust intrusion. Radial seal, layer is to seal the casing of lubrication oil, add lubrication grease of the labyrinth seal is to prevent the dust. Reducer bearing adopts the oiled or forced lubrication, in what is now the selected deceleration machine, don't need forced lubrication, the Baptist oil lubrication, is this needs in the reducer of a fuel tank, and fill the tank oil level should be higher than that of reducer bearing position, to meet the needs of the immersion oil lubrication. And aerial passenger device driving wheel of steel rope by torque is bigger, if directly with the speed reducer through coupling, the external force is greater than the standard design and strengthen the reducer bearing limit of radial force and axial force.