The hydraulic turbine is an important equipment in hydroelectric power stations that converts water wheels into mechanical energy. According to the different energy conversion methods, it can be divided into two types: counterattack type and impact type. The counterattack type uses the pressure energy and kinetic energy of water flow, and the impact type uses the kinetic energy of water. The main parts of the turbine: water diversion parts, water guide parts, working parts, drainage parts. The main structure of the Francis turbine
It consists of the channel, the main shaft, the guide bearing and the main shaft seal. , seat ring, volute and upper cover, lower ring, leakage ring (base ring), anti-leakage ring, anti-wear plate, guide vane and its operating mechanism, pit liner, ring crane in the pit, suction pipe, etc. .
Selon the different positions of the thrust bearings, what types of hydraulic generators can be divided into?
The function of the guide bearing of the vertical hydraulic generator is to support the radial thrust of the rotating part of the unit. The unbalanced mechanical force and the unbalanced electromagnetic force cause the unit axis to oscillate within the specified value range.
The main signs of a guide bearing with good performance are:
(1) Sufficient working oil film thickness can be formed;
(2) The tile temperature should be within the allowable range, generally around 50°C;
(3) The circulating oil circuit is smooth and the cooling effect is good;
(4) The oil level in the oil tank and the bearing clearance meet the design requirements;
(5) The sealing structure is reasonable and does not shed oil
(6) The structure is simple;and easy to install and repair.
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 installation 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 semi-umbrella generator. speeds below 150 rpm, the advantage is that the height of the unit is low, which can reduce the height of the frameplant time 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 of the water tank, remove the water tank fixing bolts, 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 the jack to lift the water guide slab, and then use a hoist to lift the dathe water guide and lift it halfway out of the water truck room. Pay attention to marking the orientation of the water guide tiles.