You Don’t Know How To Quickly Repair The Wear Of The Crusher’s Bearings, Right?

You don’t know how to quickly repair the wear of the crusher’s bearings, right?

The bearing position is worn and the production is stopped immediately, which is a headache.

The core equipment of the stone production line is the jaw crusher. Once the eccentric shaft stops, the entire production line will stop. The problem this time occurred was a large jaw crusher in a sand and gravel plant. The diameter of the eccentric shaft bearing seat is 250 mm, the width is 410 mm, and the wear depth on one side is 8 mm. This amount of wear caused the bearings to completely lose their fit, causing the machine to vibrate violently when it was started, making it impossible to operate normally. The person in charge of the factory was extremely anxious, because if the machine was down for one day, tens of thousands of production capacity would be lost.

Traditional repair requires disassembly, long welding time and high cost.

In the past, when this kind of bearing position was worn, most factories would choose to disassemble the entire eccentric shaft, transport it outside for repair welding, and then take it to the machine tool for processing. Just disassembling and assembling such a shaft will take several days. You don't know how to quickly repair the wear of the crusher's bearings, right? , not counting the time it takes to transport and machine it. The operation of repair welding itself is also risky. The local high temperature will cause stress deformation of the shaft body, making it extremely difficult to ensure accuracy during subsequent assembly. Some factories have tried to use metal spraying, but the thickness of the coating is limited and cannot be filled to a depth of 8 mm, so the shaft has to be disassembled.

Direct repair on site without disassembly or welding technology saves time

This time, we used Sole carbon nanopolymer material to carry out on-site repair, which did not require disassembly of the eccentric shaft and no need for hot welding. The entire repair process was carried out next to the equipment, starting from cleaning the surface, passing through the coating material, and ending with the clamping tooling, which took less than 8 hours. After the material is solidified, there is no need to go to the machine tool, and the bearing can be directly replaced to resume operation. The factory's maintenance supervisor said that if the old method was followed, production would have to be suspended for at least a week.

The repair process is divided into nine steps, with someone checking each step.

First, observe the wear condition of the bearing position, clean out the oil and impurities, and use a caliper to accurately measure the wear data. Afterwards, the surface is treated with baking oil to carbonize the oil that has penetrated into the metal, ensuring that there is no oil residue. Then use an angle grinder to polish the oxide layer to reveal the original color of the metal, and then clean it thoroughly with absolute ethanol. It is necessary to apply a release agent on the inner surface of the tooling to prevent adhesion. Finally, mix the materials according to the proportion and apply it to the worn parts. Tighten the tooling and wait for it to solidify. After the material solidifies, remove the tooling and remove the excess parts before reinstalling the bearing.

The material properties are hard, wear-resistant and impact-resistant, and will not cause pieces to fall off.

The impact load when the jaw crusher is started can be withstood by Sole carbon nanopolymer material and it has strong bonding force with the metal matrix and will not fall off or crack due to use. Its high compressive strength is riveting repair of the worn eccentric shaft bearing of the jaw crusher . Under normal working conditions, it can also withstand vibration fatigue during continuous operation. The main shaft, pulley and other parts used in crushers from other factories have been running stably for more than two years without incident because they have strong bonding force with the metal matrix and will not fall off or crack due to use. They have high compressive strength and are therefore very stable. After this maintenance was completed, the factory started the machine for an hour-long test run. The vibration values ​​and temperatures were completely normal.

Later maintenance is also convenient, and it can be repaired again after wear and tear.

If wear occurs again in the future, this material layer can be directly superimposed for repair. There is no need to remove all the old coating, and there is no need to worry about the loose fit with the original shaft base. The repair cost is much lower than replacing a new shaft or disassembling the shaft for repair welding, and the time is also several times faster. The director in charge of equipment at the factory said that the machine will be shut down for maintenance every six months and the bearing position will be checked. If there is any problem, it can be done on the same day without affecting normal production.

You are here to ask about the riveting and welding repair of the worn eccentric shaft bearing of the jaw crusher. Have you ever encountered such a situation of bearing wear? So when the worn riveting and welding of the eccentric shaft bearing of the jaw crusher is repaired , do you use the traditional method of disassembling the shaft and then repairing welding, or have you tried this method of repairing it without disassembly on site? You are welcome to tell us about your experience in the comment area. If you think it is useful, please give it a thumbs up. Send it to your peers for a look.