In the long-term operation of mining scraper winch reducers, there will often be faults such as wear and leakage. Based on years of industry experience, we have summarized the following common faults of mining scraper winches:
1. Wear of the reducer bearing room, which includes the wear of the housing bearing box, the bore bearing room inside the box, and the gearbox bearing room
2. The shaft diameter of the gear shaft of the reducer is worn. The main wear parts are the shaft head, keyway, etc.
3. Wear of reducer drive shaft bearing
4. Leaking surface of reducer.
For the wear problem, the traditional solution of the company is repair welding or machining after brush plating, but both have certain defects: the thermal stress generated by the high temperature of repair welding cannot be completely eliminated, which may cause material damage and cause parts to bend or break. However, brush plating is limited by the thickness of the coating, and it is easy to peel off. Moreover, the above two methods are metal repair metals, which cannot change the "hard-to-hard" cooperation relationship. Under the combined effect of various forces, it will still cause wear and tear. For the application of polymer material repair, it can be dismantled and machined without the effects of welding thermal stress, and the repair thickness is not limited. At the same time, the product has incomplete concession of metal materials, which can absorb the shock and vibration of the equipment and avoid re-wear. Possibly, and greatly extend the replacement of equipment components, save a lot of downtime for enterprises, and create great economic value.
For the leakage problem, the traditional method requires disassembling and opening the reducer of the mine scraper winch, then replacing the gasket or applying sealant. This method cannot be generalized. In view of the leakage problem, we have summarized the following three reasons. Only by understanding the cause of the leakage of the mine winch can we give the right solution.
The reason for the leakage of the sealing part of the mining scraper winch is generally due to the loosening of the end cap bolts when the winch is dispatched for a long time. This can be easily prevented. During the use of any machinery, due to rotation, vibration and other reasons, Causes bolts to loosen. After the winch is finished running, we can check whether the bolts at all parts of the mining scraper winch are loose, especially the anchor bolts. Loose anchor bolts can easily cause coal mine machinery accidents, and prevent coal mine machinery accidents from small things! !! It seems to be a bit far away. For this kind of bolt loosening troubleshooting, we just need to pick up the wrench and tighten the bolt.
Leakage reasons for sealing parts of mining dispatch winches 2. The oil seal is damaged due to long-term vibration, and we can replace it with a new oil seal in time.
Leakage reasons of mining scraper winch seal parts. Third, due to long-term overload operation of the winch and heat generation of the machine, the seal parts of the winch leak. The dispatching winch uses universal lithium-based grease (also called butter here). Lithium-based grease, especially lithium 12-hydroxystearate thickened grease, has only two intersection temperatures, the first intersection temperature (Ie, from pseudo-gel state to gel state) is generally above 170 ° C, and the second phase transition temperature (ie, from gel state to sol state) is generally above 200 ° C. Therefore, if the mining scraper winch is overloaded for a long time, The heat generated by the machine will cause the lithium-based grease to become a sol state, and the sol state can easily leak out of various gaps in the machine. Solution: Prohibit winch operation!
