A Centrifugal Pump Impeller with Non-smooth Surface and Its Efficiency and Noise Synergistic Design Method

Abstract

The invention provides a centrifugal pump impeller with non-smooth surfaces and a synergetic efficiency-improving and noise-reducing design method thereof. The centrifugal pump impeller comprises a cover plate and a plurality of blades, wherein an inlet is formed in the center portion of the cover plate; the multiple blades are arranged and distributed on one side of the cover plate at intervals and surround the inlet, and first non-smooth surface structures used for reducing the drag are arranged on working surfaces of at least one part of the blades correspondingly; and second non-smooth surface structures used for reducing the drag are arranged on the positions, between at least part of the adjacent blades, of the cover plate correspondingly. According to the centrifugal pump impeller with the non-smooth surfaces and the synergetic efficiency-improving and noise-reducing design method thereof, the non-smooth structures are arranged on the impeller for optimization, and the effects that the performance of a centrifugal pump is improved, pulsation in the pump is reduced, and vibration noise is reduced are achieved.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump impeller with a non-smooth surface and a method for synergistically improving its efficiency and noise. Background technique [0002] The research on bionic structures began in the 1940s, and it was discovered that the special body surface structure of organisms can significantly improve their ability to adapt to the environment. In the early stage, it mainly focused on the application of the bionic structure's drag reduction capability, and it was successfully applied in the fields of oil transportation and shipping. Until the early 1990s, it was discovered that the bionic structure also has a control effect on the flow noise, and thus another wave of research on the bionic structure has arisen. At present, foreign countries are conducting research on the application of bionic structures to reduce noise on Airbus aero-engines. The bionic noise redu...

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Problems solved by technology

[0003] After retrieval, the patent applications related to the present invention include: "A Bionic Blade Based on Shark Surface Drag Reduction Technology", publication number: CN108980101A, which adopts three hydraulic structures for the characteristics of the flow field properties at different positions of the axial flow blade The drag-reducing grooves are arranged in four sections at different positions of the blades to form the drag-reducing surface of the entire blade. Although the efficiency of the pump is increased to a certain extent, it does not affect the structural size and each position of the blade surface. The design of the drag reduction structure does not give a reasonable orthogonal comparison, and it ignores the drag reduction effect of the trailing edge of the blade

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