Induction wheel high in cavitation resisting performance

Abstract

The invention discloses an induction wheel high in cavitation resisting performance, and relates to the field of an aerospace aircraft propellant supply system. An impeller, a static blade grid, a shell and a drive shaft are included. The shell is of a hollow cylindrical structure. The static blade grid is of an annular structure. The static blade grid is attached to the inner wall of the shell. The drive shaft is of a rod-like structure horizontally placed in the shell in the axial direction. The drive shaft is located at the axis position of the shell. The impeller sleeves the outer wall ofthe drive shaft. Under driving of the drive shaft, the impeller rotates in the static blade grid. The static blade grid is fixed and comprises a base and 2n blade grid blades, wherein the blade grid blades are of a spiral strip-shaped structure and are spirally arranged along the inner side wall of the base. The spiral direction of the blade grid blades is opposite to the spiral direction of an impeller blade. By means of the induction wheel, the cavitation resisting performance of the induction wheel design work condition is obviously improved, the work condition range of the high cavitationresisting performance of the induction wheel can be widened, and the induction wheel is particularly suitable for the application occasion of the high-rotation-speed and wide-flow work range.

Description

technical field [0001] The invention relates to the field of propellant supply systems for aerospace vehicles, in particular to an inducer with high cavitation resistance performance. Background technique [0002] Aerospace vehicles need to work at high altitudes or in space away from the ground. Due to the constraints of the space size and structural quality of the vehicle, the structural size and quality of the propellant supply system are strictly limited. In order to minimize the structural size and mass, the speed of the propellant pump is higher and higher, and the pressure of the propellant tank is lower and lower in order to reduce the mass and size of the tank pressurization system. The characteristics of high speed and low inlet pressure of propellant pump require the pump to have very high anti-cavitation performance. [0003] Usually, the method of adding an inducer in front of the centrifugal wheel is used to improve the anti-cavitation performance of the pump,...

AI Technical Summary

Problems solved by technology

However, this kind of pre-boost pump requires an additional drive mechanism or high-pressure source, which greatly increases the structural size and weight of the system, reduces system efficiency, and complicates the system. It is not feasible in the case of tight space dimensions.

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