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Composite material blade for wind tunnel

A technology of composite materials and blades, which is applied in the field of composite material blades for wind tunnels, can solve the problems such as the details of the processing are not mentioned, and achieve the effect of excellent aerodynamic shape, low density and strong deformation resistance

Active Publication Date: 2014-08-13
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Composite material blade for wind tunnel
  • Composite material blade for wind tunnel
  • Composite material blade for wind tunnel

Examples

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Embodiment Construction

[0021] A composite material blade for a wind tunnel according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0022] Such as Figure 1 to Figure 3 As shown, the composite material blade used in the wind tunnel of the present invention includes a skin 2, a front / rear edge reinforcement area 1, a foam core 3, a main bearing beam 4 and a metal leaf handle. The metal petiole is forged from 35CrMo steel or 42CrMo steel. The foam core material 3 is one or a combination of PMI core material or polyurethane core material. The materials used for the skin 2, the front / rear edge reinforcement area 1 and the main bearing beam 4 are all carbon fiber reinforced epoxy resin-based composite materials.

[0023] Wherein, the metal petiole includes a square-shaped blade part 5 and a long rod-shaped shaft part 6 . The length of the blade part 5 of the metal petiole accounts for 1 / 8-1 / 3 (for example: 1 / ...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/26
Inventor 冷霜虞择斌蔡勇罗业杨智勇易美军王建昌许晓燕
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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