Sliding type yaw bearing device of wind turbine generator

The utility model discloses a wind turbine generator sliding type yaw bearing device which comprises a lower ring, the lower ring is fixedly arranged on an installation frame, an upper ring is rotatably arranged on the lower ring, corresponding installation grooves are formed in the contact faces of the lower ring and the upper ring, and rolling shafts are movably arranged in the installation grooves. The brake screw rod is rotatably arranged on the lower ring; the upper brake block and the lower brake block are correspondingly arranged on the lower ring and the upper ring of the yaw bearing, in the locking state, the motor drives the brake screw to rotate under the action of the transmission device, and the lower brake block is driven to move upwards under the action of the driving block, so that the yaw bearing is locked. The friction block on the lower brake block can make close contact with the friction plate on the upper brake block, then the upper ring can be in a static locking state, when a yaw system