High pressure annular jet pump suitable for pumping pressure type supply system

The invention belongs to the technical field of aviation and space, and particularly relates to a high pressure annular jet pump suitable for a pumping pressure type supply system. The high pressure annular jet pump comprises an inlet section pipe, a mixing section pipe, a throat pipe, a diffusion section pipe and an outlet section pipe which are sequentially arranged in the flowing direction of main fluid. The high pressure annular jet pump is characterized by further comprising step section pipes which are sequentially arranged between the inlet section pipe and the mixing section pipe; each step section pipe comprises a convergence section pipe and a straight section pipe; each straight section pipe is provided with a spraying nozzle for providing high pressure fluid. The high pressure annular jet pump is compact in structure, light in weight, good in anti-cavitation performance and capable of meeting the requirement for normal work under the working conditions of high rotating speed and low inlet pressure.