Hydraulic oscillator with bevel-type impeller

The invention discloses an oscillator for reducing resistance and increasing the mechanical rotation speed in the fields of petroleum drilling and the like, and relates to a hydraulic oscillator witha bevel-type impeller. According to the technical scheme, an upper joint, a shell and a lower joint are sequentially in screwed connection; a throttle valve plate is in screwed connection with the upper joint and is connected with a cylindrical pin through a locking screw; the cylindrical pin is positioned between the impeller and the throttle valve plate; an impeller shaft, the impeller and an impeller shell are welded into a whole part, a string bearing is installed between the impeller shell and an outer shell, the upper and lower ends of the string bearing are positioned through an inner sleeve and an outer sleeve, the lower end of the impeller shell is in contact with the upper end of a ball bearing, the ball bearing is installed on a short shaft, and the short shaft is fixed to the outer shell through thread