Self-adaptive rotating speed adjusting mechanism and rotary jet well washing device

The invention provides a self-adaptive rotating speed adjusting mechanism and a rotating jet flow well washing device, and relates to the technical field of well drilling equipment, and the self-adaptive rotating speed adjusting mechanism comprises a central pipe provided with a conveying flow channel; the rotatable shell is arranged on the periphery of the central pipe; the friction assembly is arranged between the central pipe and the shell, the friction assembly comprises a first friction piece and a second friction piece which are oppositely arranged, the first friction piece is connected with the central pipe, and the second friction piece is connected with the shell; the limiting piece is arranged on the shell and located between the central pipe and the shell; the elastic piece is arranged between the limiting piece and the first friction piece, and one end of the elastic piece is connected with the first friction piece; and the damping adjusting mechanism is arranged between the limiting piece and the