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Question:

The disc shaped part is heated and disassembled. It is a centrifugal fan impeller, 25D

The disc part is heated and disassembled. It is a centrifugal fan impeller. The 25D is very difficult to heat and disassemble. Is there a good method? Thanks

Answer:

4, Jack pressure, the hub impeller from the axis of the top;5, at the same time, using a baking gun, slow fan heating evenly;6, if not only once, may axial temperature rises, the temperature dropped to room temperature and the hub of reheating temperature, only the expansion gap.7, as mentioned above, pay attention to the impeller with a gourd hanging in the fan housing, to prevent falling.
Two, the production of Jack reaction box Demolition: if the fan impeller hub on the dismantling hole, you can make a jack reaction frame, the impeller disassembly. Specific approach is:1. Prepare the screw thread corresponding to the dismounting hole on the wheel hub;2, do a jack base bracket, used to connect the tail end of the screw rod;3. Prepare hydraulic jack. The caliber of Jack is smaller than the diameter of shaft;
First, the use of impeller dismantling device: if the scene fan impeller disassembly device, you can directly on the fan impeller remover, the main shaft of the fan down, complete fan impeller disassembly. This method is the most simple and safe. Under normal circumstances, the operation time is only 1-2 hours.
Upside down heating method: if there is no disassembly hole on the hub of fan impeller, the fan impeller should be hoisted and disassembled by inverted heating method. This method is usually used for double suction and double support large fan rotor. specificIt is set on both sides of the demolition of impeller hub, the impeller shaft of the lift on the impeller with three bar above the platform, at the same time baking gun rapid heating, thermal expansion impeller, due to gravity, will fall on their own.

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