2. Manufacture and disassembly of jack reaction frame: If there are disassembly holes on the impeller hub of the fan, you can manufacture the jack reaction frame and disassemble the impeller. The specific approach is:
1. Prepare the screws corresponding to the removal holes on the hub;
2. Manufacturing a jack base bracket connected with the end of the lead screw;
3. Prepare a hydraulic jack with a diameter smaller than that of the shaft;
4. Pressurize the jack to make the hub impeller pop out of the shaft center;
5. At the same time, slowly and evenly heat the fan hub with a baking gun;
6. If the jacking device does not move once, the temperature of the shaft center may rise. When the temperature of the hub drops to normal temperature, it will be heated again, and there will be an expansion gap if there is a temperature difference.
7. Repeat the above, and pay attention to hanging the impeller in the fan casing with a hoist to prevent it from falling.
Third,
Reverse heating method for disassembly: If there is no disassembly hole on the fan impeller hub, it is necessary to lift the fan impeller with a crane and disassemble it by reverse heating method. This method is often used for large fan rotors with double suction and double support. special
The method is: remove the wheel hubs on both sides of the middle plate of the impeller, lift the impeller with a shaft, put it above the impeller platform, and heat it quickly with a three-bar baking gun. After the impeller is heated and expanded, it will fall by gravity. Pay attention to it.
Give up the plan