Variable-frequency pulse injection device

The invention provides a variable-frequency pulse injection device which comprises a cylinder body with a through middle part, an oil inlet pipeline and an oil outlet pipeline are arranged in the cylinder body, the inner diameter of the oil inlet pipeline is larger than that of the oil outlet pipeline, and a nozzle assembly is arranged at an outlet of the oil outlet pipeline; a rotating shaft rotatably connected with the cylinder body through a ball bearing is arranged in the rotating shaft cavity, the rotating shaft comprises a long shaft section extending towards the outer side of the cylinder body and a short shaft section located in the cylinder body, and a first elliptical cavity block and a second elliptical cavity block which are consistent in shape and are in bilateral symmetry are arranged in the middle of the rotating shaft; the first oval cavity block and the second oval cavity block are combined to form an oval cavity after being installed. The jet device has the beneficial effects that through co