Speed reducer of wind driven generator

The invention discloses a speed reducer of a wind driven generator. The speed reducer comprises an impeller, an air guide pipe, a brake pad, a friction disc and a shell, the shell is fixed on the shell of the wind driven generator, and the output end of the wind driven generator penetrates through the shell; the friction disc is fixedly arranged at the output end of the wind driven generator; the impeller is sleeved on the output end of the wind driven generator; an opening of the air duct corresponds to the impeller, and the other end of the air duct is connected to the brake pad; the brake pad is arranged on the shell and corresponds to the friction disc. By arranging the air guide pipe, the rotating speed of the input end of the generator is reasonably monitored, the rotating speed of the generator can be decelerated in time, and the safety and durability are greatly improved. 本发明公开了一种风力发电机减速装置，包括：波轮、导气管、刹车片、摩擦盘和外壳；所述外壳固定于风力发电机的外壳上，并且使风力发电机的输出端穿过外壳；所述摩擦盘固设于风力发电机的输出端上；所述波轮套装于风力发电机的输出端上；所述导气管开口对应于波轮，且另一端连接于刹