Composite material blade for wind tunnel

Abstract

The invention provides a composite material blade for a wind tunnel. The composite material blade for the wind tunnel comprises a covering skin, a front edge reinforcement area, a rear edge reinforcement area, foam core materials, a main bearing beam and a metal blade handle, wherein the metal blade handle comprises a blade portion in square frame shape and a shaft portion in long rod shape, the blade portion is stretched into a central area in the covering skin in blade shape, the front edge reinforcement area and the rear edge reinforcement area are respectively arranged at the front end and the rear end of the interior of the covering skin, the covering skin and the blade portion are filled with the foam core materials, the square main bearing beam is embedded between the covering skin and the blade portion, the thickness of the main bearing beam is varied and decreases progressively in ladder mode from one side of the shaft portion, and the width of the main bearing beam is varied and decreases progressively in ladder mode from the side of the shaft portion. The composite material blade for the wind tunnel is made of carbon fiber composite material, and thereby is light and strong. Furthermore, the foam core materials have an effective supporting function for a wing-shaped profile surface of the composite material blade for the wind tunnel, and the main bearing beam bears a majority of loads on the composite material blade for the wind tunnel.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel blades, and in particular relates to a composite material blade for a wind tunnel. Background technique [0002] Due to the high rotational speed of the wind rotor blades in the wind tunnel, a large centrifugal force will be generated accordingly, so the original metal blades need to be reduced in weight; at the same time, the corrosion resistance, durability and fatigue resistance of the original metal blades are also facing challenges . [0003] The basic properties of carbon fiber materials are as follows: small density, light weight, density 1.5 ~ 2g / cm 3 , which is equivalent to 1 / 4 of the density of steel and 1 / 2 of the density of aluminum alloy; the strength and elastic modulus are high, and the elastic recovery is 100%; it is anisotropic, the thermal expansion coefficient is small, the thermal conductivity decreases with the increase of temperature, and it is resistant to shocks. Col...

AI Technical Summary

Problems solved by technology

However, looking at domestic and foreign literature and patents, there are few reports on the specific structure and production process of composite blades for wind tunnels.

Although the article STRUCTURAL DESIGN, OPTIMISATION AND MANUFACTURING OF A COMPOSITE WIND TURBINE BLADE introduced the general structure and analysis and calculation of the acoustic wind tunnel composite blade, but did not mention the details

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