Static impeller of magnetic levitation axial flow fan

Abstract

The invention discloses a static impeller of a magnetic levitation axial flow fan. The static impeller comprises an inner ring, blades and an outer ring, wherein the inner ring, the blades and the outer ring are sequentially connected from inside to outside; a sealing mounting groove is formed in the inner ring and is used for mounting a sealing part; a caudal vertebra mounting spigot is formed in the inner ring and is used for mounting a caudal vertebra part; and a protection ring spigot is formed in the outer ring, and the protection ring spigot is used for mounting a protection ring for protecting a movable impeller. The protection ring spigot is arranged and used for mounting the protection ring, the movable impeller is arranged in the protection ring in a matched manner, and when the movable impeller rotates at a high speed and deforms, the protection ring can elastically deform, so as to avoid the blades of the movable impeller and reduce abrasion of the blades of the movable impeller. According to the fan, the sealing mounting groove is formed and used for mounting the sealing part, so that gas leakage is reduced, the pressure and flow of the fan are increased, the sealing part dissipates gas vibration energy, and the operation noise of the fan is reduced.

Description

technical field [0001] The invention relates to an impeller, in particular to a stationary impeller of a magnetic levitation axial flow fan. Background technique [0002] A fan is a machine that converts mechanical energy into kinetic energy of a gas medium. Through the rotation of blades of a specific shape, the directional movement of the gas is driven to generate kinetic energy. Fans are widely used in various occasions for cooling, moisture-proof, etc. An axial flow fan refers to a fan whose gas movement direction is parallel to the rotor axis. Compared with a centrifugal fan, an axial flow fan outputs a larger gas flow rate and a lower gas pressure. In order to meet the aerodynamic requirements of the fan, in addition to the rotating impeller, some axial fans are also equipped with a static impeller. The static impeller cooperates with the moving impeller to improve the gas flow field in the fan and meet the design requirements of the fan's gas pressure and gas flow. I...

AI Technical Summary

Problems solved by technology

When the rotating speed of the moving impeller is high, the blades of the moving impeller will be deformed during rotation, which will rub against the inner wall of the casing. After a period of time, the length of the blade will become shorter, which cannot meet the aerodynamic requirements, especially for materials with a small elastic modulus. This situation is especially obvious for the manufactured impeller, so there must be a protective structure to adapt to the change of the impeller; on the other hand, when the aerodynamic requirements of the fan increase, such as flow, pressure, and operating noise requirements, the impeller and The gap between the hub of the stationary impeller will cause many problems. Due to the high-speed rotation of the moving impeller relative to the stationary impeller, there must be a gap between the hub of the moving impeller and the stationary impeller. Considering the processing and assembly accuracy, the value of the gap has the minimum extreme value. Therefore, There must be auxiliary structures to weaken the adverse effects of this gap

These two requirements cannot be met by the existing static impeller structure

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