Sealing water recycling device for main shaft of bulb tubular hydroelectric generating set

The invention relates to the field of lubrication and cooling of a bulb tubular water-turbine generator set main shaft seal, in particular to a bulb tubular water-turbine generator set main shaft seal water recycling device which comprises a main shaft water supply device, the main shaft water supply device can be used for a single unit or multiple units, and a main shaft of each unit is provided with a main shaft sealer. A first water supply device is arranged at one end of the main shaft sealing drainage pipe, and a fine filtering device is arranged at one end of the first water supply device; an ultrafiltration device is arranged at one end of the main shaft water supply device; the first water storage device is arranged at an outlet of the ultrafiltration device; two groups of second water supply devices are arranged on one side of the first water storage device; the second water storage device is arranged at one end of the second water supply device; main shaft sealing water of the unit can be recycled,