Integrated permanent magnet roller

An integrated permanent magnetic roller comprises a permanent magnetic roller body, a torque limiting mechanism, a non-return mechanism, a braking mechanism, a hydraulic system, a monitoring device of the hydraulic system and a braking torque monitoring device, and is characterized in that the braking mechanism, the torque limiting mechanism, the non-return mechanism and the permanent magnetic roller body are directly connected to form an integrated compact structure; and an integrated combined structure A of the torque limiting mechanism and the non-return mechanism and a brake mechanism B are connected with a fixed shaft through a torque limiting outer tooth hollow shaft and an outer tooth hollow shaft respectively to form an integrated compact structure. Through integrated arrangement, controllable setting of the non-return torque of the non-return mechanism in a mechanical and hydraulic control mode is achieved, and through flexible arrangement of the installation positions of the torque limiting mechanis