Today, during the maintenance of manual valve replacement bearings, I did not record the demolition of the demolition of the bearing sequence, they are a shaft on the upper and lower sets of thrust ball bearings, bearings in the middle of the gear two. In the installation of the lower part of the bearing can also be easier to install, when the installation of non bearings, bearings are tight, it is difficult to hit, but in the end I was forced into it. Want to know whether the two bearings in the installation process has no film in which the film in say, and they like to put on after the isolated bearing, the two sets of bearings is to cooperate with the work.
Install thrust bearing, verticality inspection shaft and shaft centerline. 1000 meter test available lengthened., leaving a gap of 0.2 0.5mm is between the hole and the bearing seat of thrust bearing, the gap can ensure the automatic adjustment, avoid friction, make its normal operation.
Thrust roller bearings are used to bear axial load, axial load and radial joint load, but radial load should not exceed 55% of axial load. Compared with other thrust roller bearings, this kind of bearing has lower friction coefficient, higher rotating speed and better self-aligning performance. 29000 stick bearing asymmetric spherical roller, can reduce the roller and the raceway in the work of sliding and roller length, diameter, and roller number, high load capacity, usually by oil lubrication, individual low speed can be used for grease lubrication. In the design selection, should be preferred; 80000 type cylindrical roller thrust bearing, 90000 thrust tapered roller bearings and thrust needle roller bearings AXK type, can withstand a one-way axial load, axial load capacity than the thrust ball bearings are much larger, and the axial rigidity, small space occupation. Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed occasions, and thrust cone roller bearings have a higher rotational speed than thrust cylindrical roller bearings.
A thrust ball bearing is a separable type bearing, the shaft ring and the seat ring can be separated from the components of the cage and the steel ball. The shaft ring is matched with the shaft is matched with the seat ring, bearing hole phase of the ring, there is a gap between the axis and thrust ball bearings; can only bear the axial load, axial load is one-way thrust ball bearing can bear a direction of the axial load, two-way thrust ball bearings can withstand the two directions of the thrust; the ball bearings can limit the radial displacement of the shaft, the speed limit is very low, the axial displacement in one direction thrust ball bearing can limit shaft and shell, axial displacement bearing can limit the two directions.
