A kind of method that adopts carbon fiber composite material to prepare impeller of centrifugal fan

Abstract

A method for preparing a centrifugal ventilator impeller with carbon fiber composite materials is characterized in that the impeller is decomposed into three independent parts, namely an impeller cover, a blade and an impeller disk, the three parts are formed individually, and then the three parts are assembled into a whole; the impeller cover, the blade and the impeller disk are made of T300 orthogonal carbon fiber sheet prepreg and T700 homotaxial carbon fiber sheet prepreg which are laid into multiple layers in a certain laying direction sequence in a circulating mode; after the layers are laid ready, the impeller cover, the blade and the impeller disk are vacuumized and sent into a furnace to be cured at a medium temperature, and finally the integral whole is formed. The impeller is made of the carbon fiber composite materials, carbon fibers in the structure of the carbon fiber composite materials serve as main materials for bearing the force, the fibers are different in bearing capacity in different directions, and therefore the carbon fiber composite materials has designability. The 'fiber orientation' design aims to utilize the directivity of carbon fiber materials and maintain the continuity of a force transmission path in the structure to the maximum extent, and a laminated board subjected to in-plane loads can be designed into layers in different directions in the structural design process so that structure demands can be met.

Description

technical field [0001] The invention relates to a centrifugal fan, in particular to a method and impeller structure for preparing a centrifugal fan impeller by using carbon fiber composite materials. Background technique [0002] The centrifugal fan is a kind of mechanical equipment with a large quantity and a wide range, which is widely used in various ships. While the fan is transporting gas, it is accompanied by structural vibration and air noise. The hazards of vibration and noise are reflected in three aspects: (1) affecting the work and rest of station personnel; (2) reducing the acoustic invisibility of ships; (3) large vibrations can easily lead to fatigue damage of equipment materials, reducing equipment service life. [0003] The structure of a typical marine centrifugal fan is shown in figure 1 . Its main components are: drive motor 1, impeller 2, volute 3 and air inlet 4. The impeller is directly installed on the shaft extension end of the motor, the volute i...

AI Technical Summary

Problems solved by technology

The weight of the existing centrifugal fan impeller made of metal is relatively large, which increases the unbalanced excitation of the fan rotor

[0017] Secondly, the existing fan impeller is made of steel, aluminum or titanium alloy, which has poor vibration attenuation performance, and the impeller is directly installed on the shaft end of the motor through the shaft plate, so that the vibration of the impeller is transmitted to the motor rotor through the hub, increasing The overall vibration of the fan

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