According to clause 6.3 of document GB/T7894-2009 "Basic technical conditions for hydrogenerators", when the hydrogenerator operates under normal working conditions, the maximum temperature measured using the method of built-in thermometer should not exceed:
Guide bearing regula alloy tile 75℃
Guide bearing plastic tile body 55℃
So if the ambient temperature is 20℃, the temperature increases are 55K and 35K.
How to disassemble the water wheel of the sfw200-12 hydrogenerator
According to the different positions of the stops, hydrogenerators can be divided into two types: suspension type and suspension type. umbrella.
The generator with the thrust bearing located above the device is called a suspension generator, which is suitable for speeds above 100 rpm. The advantages are low thrust bearing loss, easy installatione and more stable operation; The downside is that the taller the unit, the more steel is used.
The generator with the stopper located below the device is called an umbrella generator. The generator without top guide is called full umbrella generator. The generator with top guide is called umbrella generator. speeds below 150 rpm, the advantage is that the height of the unit is low, which can reduce the height of the factory building and save steel; the disadvantage is that the stop has a significant loss and is impractical to install and inspect; , and maintain.
1. Remove the inner cover, handrails, brackets, etc. of the hydraulic wheel.
2. Remove the water seal device from the water guide bearing (1# machine is seal, 2# machine is rubber flat seal).
3. Remove the external pipe from the water tank, remove the boltss fixing the water tank, lift the water tank and use a hoist to take it out of the water truck room after decomposition.
4. Push the shaft to the water guide and measure the clearance of the water guide tile as a reference for maintenance and adjustment of the water guide bearing. 5. Loosen the anti-weight bolts of the water guide slab, use a jack to lift the water guide slab, then use a hoist to lift the water guide slab and lift it halfway out from the water truck room. Pay attention to marking the orientation of the water guide tiles.