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

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of aviation and aerospace, and relates to a pre-pressurization device, in particular to a high-pressure annular jet pump suitable for a pump pressure supply system. Background technique [0002] Aerospace vehicles need to work at high altitudes, or in space, away from the ground. Constrained by the space size and structural quality of the aircraft, the structural size and quality of the pump-type supply system are strictly limited. In order to keep the structural size and mass as small as possible, the rotational speed of the propellant pumps is getting higher and higher. In order to reduce the mass and size of the tank pressurization system, the pressure of the propellant tank is lower and lower. The high speed and low inlet pressure of the propellant pump require the pump to have very high anti-cavitation performance. [0003] The cavitation performance of the pump is determined by the cavitation ratio ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that centrifugal pumps in the prior art cannot operate at high speed under low inlet pressure and be used in small-sized spaces, the present invention provides a high-pressure annular jet pump with compact structure, light weight and good anti-cavitation performance, which enables the propulsion The agent pump can work normally at higher speed and lower inlet pressure

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