Ocean current power generation device with self-regulating function

The invention discloses an ocean current power generation device with a self-regulating function. The ocean current power generation device comprises a horizontal impeller, a fixed disc, a magnetic coupling coupler, a magnetic gear speed increaser, an electric generator, an energy storage device, a speed limit control mechanism, a sealed cabin, a supporting rotating shaft and a fixed bracket, wherein the magnetic gear speed increaser, the electric generator, the energy storage device and the speed limit control mechanism are all arranged in the sealed cabin; the tail part of the sealed cabin is fixedly connected with a streamline tail fin to regulate the directions of the horizontal impeller and the sealed cabin so that the incident flow power generation is realized. The ocean current power generation device disclosed by the invention realizes the self-regulating function through a mechanical type structure and can be adapted to the change of different ocean current directions, meet the requirement for power generation in any direction, increase the utilization efficiency of ocean current energy and provide larger electric quantity for offshore and subsea equipment.