Maintenance of forklift clutch release bearing

The engine does not disintegrate the oil filling method. First open the clutch cover to check the wear of the separated bearing. If it is confirmed that the bearing is not damaged or the wear is not over the limit, remove the clutch pedal, adjust the connecting rod pin, and return the separating bearing and its seat back. In the final position, fill the hole in the bearing housing with a grease gun until the bearing overflows. Then turn the bearing slightly, refill the oil, repeat the above work until there is a little butter around the bearing, and then turn the bearing. Observe the amount of oil. If there is resistance to the rotation of the bearing, it is proved that the bearing is filled with butter. Then remove a small amount of butter that has spilled over the separation housing and reinstall the removed pin and clutch cover.
The oil-filling method of engine disintegration exposes the engine to the assembly of the separation bearing and the bearing housing, and uses a grease gun to fill the small oil hole below the inner ring of the separation bearing housing. When the bearing has a butter overflow, the bearing is rotated until the bearing has a ring. The butter can overflow.
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Centrifugal fan causes high bearing temperature

1. Poor lubrication, deterioration of oil (fat) or lack of oil (fat).

2. The assembly quality of the bearing is poor, the pre-tightening force is too large, and the working clearance is small.

3, the bearing itself is of poor quality, such as the original clearance is not required, or the roller or ferrule is defective.

4, the fan vibration large bearing withstand the impact load.

5, the bearing cooling is not good, ventilation or water shortage is insufficient.

The selection of the centrifugal fan bearing, the unit of use will generally be replaced according to the original model of the equipment manufacturer, without paying much attention to whether the selection is appropriate, from the above examples, it is caused by improper selection of bearings. Because the shaft and bearing of the centrifugal fan are generally selected with H7/js6 (or H7/k6), the matching between the bearing and the bearing housing hole is generally JS7/h6. This kind of cooperation is not too tight, and the impact on the bearing clearance is limited. For centrifugal fans with higher rotational speed and higher working temperature, the tightening of the connecting bolts of the bearing seat and the upper cover is generally not carried out by torque. In order to prevent loosening, the tightening force is often too large, so that the working clearance becomes variable. Small, which causes the bearing to heat up and cause high temperature; or because the bearing working clearance is small, the free end bearing can not automatically move with the thermal expansion of the shaft, so that the axial load of the two bearings is too large, causing the bearing to heat damage. Therefore, when replacing the bearing in production, especially the bearing of the centrifugal fan with higher speed and higher working temperature, pay attention to the selection of the bearing. First, pay attention to whether the limit speed is suitable. Second, choose C3 with large original clearance. Group bearings.
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