Stress application centrifugal pump with pressurization hole

Abstract

The invention discloses a stress application centrifugal pump with a pressurization hole and belongs to the field of stress application fuel systems of aircraft engines. The stress application centrifugal pump comprises a vane wheel and a shell, wherein the shell comprises a vortex chamber and a diffusion tube; the vane wheel is mounted in the vortex chamber; the diffusion tube is communicated with the vortex chamber; a conical casing tube is arranged on the inner wall of the diffusion tube; a volute tongue is formed in a boundary between the vortex chamber and the conical casing tube; the shell also comprises a pressurization hole; the pressurization hole is a circular through hole from the diffusion tube to the downstream of the volute tongue. The stress application centrifugal pump with the pressurization hole can effectively solve the problem of cavitation erosion damage caused by cavitation of the stress application centrifugal pump.

Description

technical field [0001] The invention belongs to the field of afterburner fuel systems of aero-engines, and in particular relates to a structural design of an afterburner centrifugal pump with booster holes, which can effectively solve the cavitation damage problem of the afterburner centrifugal pump caused by cavitation. Background technique [0002] The afterburner centrifugal pump is an important part of the afterburner fuel system of an aero-engine, and its function is to provide fuel with a certain pressure and flow to the afterburner fuel system. The existing afterburning centrifugal pump structure such as figure 1 As shown, it usually consists of impeller 1 and casing 2. The housing 2 includes a volute 3 and a diffuser 4 . The impeller 1 adopts a radial straight impeller, and the volute 3 adopts a concentric volute with a semicircular section shape, and the impeller 1 is installed in the volute 3 . The diffuser 4 is a conical diffuser, and the diffuser 4 communicate...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the cavitation damage problem of the afterburning centrifugal pump, and propose a kind of afterburning centrifugal pump with a booster hole, which can suppress the occurrence of cavitation in the afterburning centrifugal pump, thereby avoiding the cavitation of the afterburning centrifugal pump due to cavitation. cavitation damage, prolong the service life of the afterburner centrifugal pump, and ensure the safe operation of the aero-engine

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