For jaw crusher, the role of bearing is very important. If there is damage, it is very easy to cause accidents such as shutdown. In production, various problems will inevitably occur in the bearing of crusher. Abnormal temperature rise is one of the common faults. Today we will talk about the causes of this problem.
Before understanding the cause of failure, we be familiar with the installation position of jaw crusher bearing. There are two pairs of bearings on the jaw
Two pairs of bearings are one of the important parts of jaw crusher. One pair of bearings is installed between the frame and the eccentric shaft, which is usually called the frame bearing. The frame bearing supports the eccentric shaft for rotary motion; The other pair of bearings is installed between the movable jaw and the eccentric shaft, which is usually called the movable jaw bearing. When the eccentric shaft rotates, the supporting movable jaw swings, so that the movable jaw can periodically approach and stay away from the fixed jaw. Next, we will analyze the causes of abnormal temperature rise of bearing
1. The bearing of jaw crusher is seriously worn or the cage is damaged
Once the bearing is worn, over time, the inner ring, outer ring, rolling element and cage of the bearing will change in size, the fit clearance of the bearing will increase, and the operation accuracy will decrease, which will cause the temperature rise, vibration increase and noise increase of the bearing. In serious cases, it will to heating, vibration increase, bearing burning and even shaft bending.
2. The bearing quality is poor and the original clearance is small
If the clearance of the bearing does not reach the specified value, the clearance will be too small after installation, which will cause the bearing to heat up during operation and the temperature will gradually rise.
3. Axial positioning error of jaw crusher bearing
Once there is a problem in the axial positioning of the bearing, the labyrinth ring or bearing gland is not installed in place, and the eccentric axial side moves during operation, so that the clearance of the bearing is reduced and the bearing is heated.
4. The machining error of jaw bearing hole is large
Large machining error of bearing hole and coaxiality exceeding the allowable value to large coaxiality error of bearing outer ring after installation of two disc movable jaw bearing, which will cause smaller clearance and bearing heating.
5. There is something wrong with the spindle
The coaxiality error of the journal installed on both sides of the spindle is too large, which exceeds the allowable value of the design. In this way, the coaxiality error of the inner ring after the installation of the bearings at both ends is too large, which s to the smaller clearance and the bearing heating.