Jaw crusher frame cracked, what's the reason

Jaw crusher is indispensable rough crushing equipment in mine crushing production line, usually used for primary crushing of materials. Its crushing ratio is large, the crushing particle size is uniform, the structure is simple, the work is reliable, the maintenance is simple, and the operating cost is economical. It is widely used in metallurgical, mining, chemical, cement, construction, refractory and ceramic industries to crush and finely crush various medium-hard ores and rocks. However, even the * equipment will inevitably have certain failures during long-term use, such as cracking of the jaw crusher frame. The following are the causes and solutions of the cracking of the jaw crusher frame summarized by Jiaozuo Zhongxin.

Reasons for cracking of jaw crusher frame:
    1. The quality problem of the equipment itself caused by the casting technology or welding failure of the jaw crusher in production.
    2. The materials for the brackets and brackets are unqualified and cannot bear the huge impact force. They can't play the role of buffer and self-protection under the impact, but the frame is damaged or broken.
    3. The fixed jaw plate is not firm enough during installation, and it will loosen in the vibration generated by the jaw crusher for a long time, which will hit the tooth plate of the front wall of the rack and damage the rack.
    4. The rigidity of the foot foundation of the main unit of the equipment is not fixed, causing the rack to jump.
    5. The bolts of the frame bearings are not tightened during installation, and are loose.
    6. There is no timely maintenance after the tooth shape wears.
    7. The eccentric shaft and pin are damaged or the expansion sleeve is loose, which causes the weight of the flywheel wheel to be misaligned.

How to remove the cracking of the jaw crusher frame:
    1. Identify the location of the original crack and repair it by welding. If the fault cannot be resolved, the new frame should be replaced in time.
    2. Replace the bracket and bracket at the same time when changing the rack to ensure that the two are compatible with the rack.
    3. After the frame is repaired or replaced, the tooth plate bolts should be fixed; and the frame foot bolts should be tightened to correct the level.
    4. Check the jaw plate and find that it needs to be replaced in time if it is worn.
    5. Replace the pin or adjust the direction of the eccentric block, and fix the expansion sleeve tightly.