Radial-flow type multi-stage counter-rotating centrifugal impeller and using method thereof

Abstract

The invention discloses a radial-flow type multi-stage counter-rotating centrifugal impeller and a using method thereof, and relates to the technical field of fluid mechanical rotor dynamics. The impeller comprises a power input shaft, a forward rotating impeller disc and a reverse rotating impeller disc, wherein the forward rotating impeller disc is installed on the power input shaft through an impeller hub; the reverse rotating impeller disc is in transmission connection with the power input shaft through a reverse rotating gear assembly and is buckled with the forward rotating impeller disc; the forward rotating impeller disc and the reverse rotating impeller disc are both concave discs; the concave side of the forward rotating impeller disc is provided with a plurality of stages of forward rotating blade sets which are arranged in the radial direction; the concave side of the reverse rotating impeller disc is provided with a plurality of stages of reverse rotating blade sets whichare arranged in the radial direction; and the plurality of stages of forward rotating blade sets and the multiple stages of reverse rotating blade sets are sequentially arranged in a staggered mode toform a multi-stage working medium channel. According to the impeller, the motion inertia of a working medium is fully utilized, the output power of the radial-flow type impeller is increased, the characteristics of multi-stage compression of an axial-flow type impeller and efficient centrifugation of a radial-flow type impeller are fully fused, and the high energy conversion efficiency is achieved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of fluid mechanical rotor dynamics, and in particular to a radial-flow multi-stage counter-rotating centrifugal impeller and a method for using the same. Background technique [0002] The impeller can be divided into radial flow type, axial flow type and mixed flow type according to the shape and the direction of fluid flow in the pump casing. Radial flow impellers are widely used in engine auxiliary power units, micro gas turbine engines, small and medium-sized aviation turboshaft engines, ethylene compressors, and water pumps. The working principle is that fluid enters the impeller along the axial direction and is thrown out along the radial direction. The kinetic energy obtained by the fluid mainly comes from the centrifugal force generated when the impeller rotates. [0003] The existing radial flow impeller has the following disadvantages: first, the radial flow impeller mainly us...

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a radial flow multi-stage counter-rotating centrifugal impeller and its use method to solve the above-mentioned problems existing in the radial flow impeller in the prior art

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