Teach you how to repair the 10 major fault-prone parts of jaw crusher(3)

5. Replacement and lubrication of the inner and outer bearings of the movable jaw

During the operation of the jaw crusher, a piercing noise occurred, and the jaw crusher was stuck in a short period of time, and the flywheel no longer rotated. Disassemble the flywheel and open the protective cover. It was found that the outer bearing cage of the movable jaw was damaged, and the inner rolling balls were scattered and damaged. After the movable jaw was lowered, it was found that the internal bearing was also partially damaged.

First, deal with the bearing of the movable jaw: boil the bearing of the stock spare parts for 2 hours, and use the sledgehammer pad copper rod to hammer in turns to wedge the bearing into its original position. After that, the whole movable jaw is hoisted. For the external bearing, the main shaft can be lifted by the self-made steel pipe pad jack, and the bearing can be lifted onto the shaft by a small crane, and then hammered into the specified position according to the steps. Then hoist the flywheel, install the V-belt, and start the machine after debugging. The grease used in the jaw crusher should be determined according to the place of use and temperature conditions. Generally, calcium-based, sodium-based and calcium-sodium-based greases are used. The grease added into the bearing housing is about 50% of its space volume, and it is replaced every 3 to 6 months. Clean gasoline or kerosene should be used to clean the raceways of the roller bearings when changing the oil.

6. toggle plate replacement

In the production process, the brackets are often subjected to cracks and even cracks due to large forces, and what is more, there will be transverse faults, which need to be replaced in time. When replacing, first take out 2 to 3 pieces of steel plates that are used to adjust the size of the blanking opening, push the jack forward to prevent the movable jaw from falling, hang the bottom of the movable jaw with a wire rope and connect the upper part with a 5 ton inverted chain to the machine Tension on the frame and loosen the adjusting rod bolts. At this time, steel drills can be used on both sides at the same time, and the waste brackets can be slowly lifted out with a crane, and then the new brackets can be installed and fastened everywhere for use.