Vertical axis wind turbine

The invention discloses a vertical axis wind turbine which comprises a power generation unit, a rotating shaft, a connecting assembly arranged on one side of the rotating shaft, blades arranged on the connecting assembly and a power generator arranged on one side of the rotating shaft. And the braking unit is arranged on the lower side of the rotating shaft and comprises a lower connecting rod, a sliding block arranged on one side of the lower connecting rod, a connecting piece arranged on one side of the sliding block, a braking assembly arranged on one side of the connecting piece and a friction disc arranged on the lower side of the braking assembly. The vertical-axis wind turbine has the beneficial effects that the vertical-axis wind turbine is low in cost, the speed reduction adjusting function can be automatically conducted according to the rotating speed of the rotating shaft, and the higher the rotating speed of the rotating shaft is, the more obvious the braking effect is. 本发明公开了一种垂直轴风力发电机，包括发电单元，包括转