CN209414244U - A kind of foam sandwich carbon fiber trailing edge reinforcement binding structure - Google Patents

Abstract

The utility model belongs to composite structure design field, is related to a kind of foam sandwich carbon fiber trailing edge reinforcement binding structure.The utility model is overlapped by trailing edge carbon fiber, improves rear intensity, by removing the foam because overlapping increased thickness on foam, makes blade surface not because overlap joint causes surface irregularity.Reinforce rear intensity, avoid causing rear to crack because of rear existing defects in production process, improves product qualification rate and service life, reduction causes increased production cost because qualification rate is low, while increase product is use value.

Description

A kind of foam sandwich carbon fiber trailing edge reinforcement binding structure

Technical field

The invention belongs to composite structure design fields, are related to a kind of foam sandwich carbon fiber trailing edge reinforcement Binding structure.

Background technique

As national economic strength enhances, make great efforts the development to high-tech areas such as Aeronautics and Astronautics, develops all kinds of boats It, aviation aircraft, need to carry out a large amount of wind tunnel test work, meanwhile, the resistance to compression heat resistanceheat resistants of a variety of materials test, automobile, height Fast train, the air drag of ship, heat-resisting and compression test are also required to carry out wind tunnel test.Therefore low speed, transonic speed, ultrasound Fast, hypersonic all types of wind-tunnel are rapidly developed, up to the present, China possessed low speed, high speed, ultrahigh speed and The wind-tunnel such as shock wave, electric arc, for the variation to meet the market requirement, the product of my company will also do corresponding adjustment.

Compressor is the core equipment of continous way transonic wind tunnel, and compressor blade therein is key in core, is The overall weight for reducing compressor, reduces the starting inertia of compressor, and composite material relies on its light weight, superior specific strength, It is preferred as compressor blade that the advantages that specific stiffness, specific modulus and corrosion resistance, gradually replaces metal material.For reduce energy consumption, Reduce compressor weight and rotary inertia, the main material using carbon fibre composite as compressor blade.To reduce energy Consumption reduces compressor weight and rotary inertia, the foam using carbon fibre composite as the main material of compressor blade Interlayer structure, structure are shown in Fig. 1.Foam 2 is placed on inside outer layer carbon fiber 1, and foam can not only mitigate leaf weight, while also improve Blade stiffness, rear is not docked outer layer carbon fiber at I.After layer paving, pass through compression molding, hot setting.Because outer Layer carbon fiber is docked in rear, and blade can cause to crack in use if there is tiny flaw here, and blade is caused to damage It is bad, the service life of blade greatly reduces.

Summary of the invention

The purpose of the present invention: it is an object of the invention to overcome to lead to blade because trailing edge is if there is tiny flaw Rear cracking, leads to blade damage.

Technical solution of the present invention: a kind of carbon fiber trailing edge reinforcement binding structure, including carbon cloth 1 and foam 2, Carbon cloth 1 is wrapped on foam 2, and is connected at trailing edge I, and carbon cloth 1 is multilayer, is designed as step at one end Shape, short end are docked with the other end, and long end and the other end overlap, and overlap thickness is that the thickness at long end adds the thickness of carbon cloth 1 Degree；It is characterized in that, foam 2 is equipped with the groove of 1 consistency of thickness of carbon cloth and corresponding with 1 overlap of carbon cloth.

Length that overlapped is 30mm.

Long end is with a thickness of 0.61mm.

Beneficial effects of the present invention: the present invention is overlapped by trailing edge carbon fiber, improve rear intensity, by The foam because overlapping increased thickness is removed on foam, makes blade surface not because overlap joint causes surface irregularity.It is strong to reinforce rear Degree, avoids causing rear to crack because of rear existing defects in production process, improves product qualification rate and service life, reduce because Production cost caused by qualification rate is low, increase product is use value.

Detailed description of the invention

Fig. 1 prior art docking structure sectional view

Fig. 2 docking structure sectional view of the present invention

Fig. 3 foam trailing edge formations schematic diagram

1-outer layer carbon fiber, 2-foams, I-trailing edge, K- foam rear, L-carbon fiber rear package in the figure Length

Specific embodiment

As shown in Figure 2 and Figure 3, a kind of carbon fiber trailing edge reinforces binding structure, including carbon cloth 1 and foam 2, carbon Fiber cloth 1 is wrapped on foam 2, and is connected at trailing edge I, and it is increased that overlap carbon cloth 1 is removed on foam 2 The material of thickness；Blanking is carried out by blanking machine, keeps the carbon cloth 1 below foam more longer than theoretic length, is used for Overlap joint；Numerical control processing removes the material because of the increased thickness of overlap carbon cloth 1 on foam 2, after Fig. 3 foam is seen in position At edge K；First the carbon cloth 1 below foam is completed, then places the foam processed, by the carbon fiber above foam Cloth 1 turns over both ends overlap joint, and the carbon fiber 1 below foam is wrapped in above foam on carbon cloth 1, and the lap of splice is carbon fiber Rear packages length L is tieed up, as a result sees Fig. 2.

Carbon cloth 1 is multilayer, is designed as at one end step-like, and short end dock with the other end, long end and other end overlap joint, Overlap thickness is that the thickness at long end adds the thickness of carbon cloth 1, length that overlapped be 30mm, long end with a thickness of 0.61mm；By blanking machine carry out blanking, make outermost layer below foam, with a thickness of 0.61mm carbon cloth 1 than theoretic The long 30mm of length, for overlapping；Numerical control processing is removed because of increased 0.61 thickness of overlap carbon cloth 1 on foam 2 Material, position are seen at Fig. 3 K；First the carbon cloth 1 below foam is completed, then places the foam processed, will be steeped Carbon cloth 1 above foam is turned over to be docked with short end, and the carbon fiber 1 at long end is wrapped in carbon fiber above foam below foam On cloth 1, as a result lap of splice 30mm is shown in Fig. 2.

Claims (3)

1. a kind of foam sandwich carbon fiber trailing edge reinforces binding structure, including carbon cloth (1) and foam (2), carbon fiber Cloth (1) is wrapped on foam (2), and is connected at trailing edge I, and carbon cloth (1) is multilayer, is designed as step at one end Shape, short end are docked with the other end, and long end and the other end overlap, and overlap thickness is that the thickness at long end adds carbon cloth (1) Thickness；It is characterized in that, foam (2) be equipped with the groove of carbon cloth (1) consistency of thickness and with carbon cloth (1) overlap It is corresponding.

2. foam sandwich carbon fiber trailing edge as described in claim 1 reinforces binding structure, which is characterized in that it is long that overlapped Degree is 30mm.

3. foam sandwich carbon fiber trailing edge as claimed in claim 1 or 2 reinforces binding structure, which is characterized in that it is grown End is with a thickness of 0.61mm.