Stator cooling water system

The invention relates to a stator cooling water system which comprises a stator cooling water pump and a water return tank, a water outlet of the water return tank is connected with a water inlet of the stator cooling water pump through a first connecting pipe, and a water outlet of the stator cooling water pump is connected with a water inlet of a cooling pipeline arranged in a generator through a second connecting pipe. A water outlet of the cooling pipeline is connected with a water return port of the water return tank through a third connecting pipe to form a cooling water loop; the end part of the rotating shaft of the generator is connected with the rotating shaft of the stator cooling water pump through a transmission mechanism, so that the rotating shaft of the generator can drive the stator cooling water pump to synchronously operate when rotating. By means of the scheme, mechanical energy of the rotating shaft of the generator in the rotating process can be directly transmitted to the rotating shaft