Composite blade main load-bearing carbon beam

Abstract

The utility model relates to a kind of composite blade main load-carrying member carbon beam, length direction includes blade root portion, leaf handle portion, blade portion in sequence;Inside and outside direction is composed of beam core and beam outer layer, the beam core and beam outer layer are made of carbon fiber composite material;The beam core is solid structure;The blade root portion is equipped with first boss, second boss, third boss, the third boss is located at the root of beam core, first boss is located at the root of beam outer layer and is formed on the basis of third boss imitation, second boss is formed in the beam outer layer on the side of third boss;The cross section of first boss and second boss is wedge shape shape.The utility model solves the problem of insufficient rigidity of existing composite blade main load-carrying member carbon beam under the requirement of limited weight.

Description

Technical Field

[0001] This utility model relates to a carbon beam, the main load-bearing component of a composite material blade, and belongs to the field of compressor blade technology. Background Technology

[0002] The compressor blades operate at a high speed during rotation. Under high-speed operation and due to the weight of the blades themselves, the blades generate a large centrifugal force during rotation. The carbon beams of the blades bear almost all of the centrifugal force and bending moment.

[0003] Traditional composite propeller blades use a classic clasp beam, such as... Figure 6 As shown, the blade's carbon beam portion consists of a skin and a main load-bearing carbon beam structure of a certain thickness and width added inside the skin. A foam core layer is sandwiched between the carbon beams. However, during analysis and calculations, it was found that when using this type of existing carbon beam, regardless of how much the carbon beam thickness is increased, the blade's design stiffness is difficult to meet the required standards. Increasing stiffness means reducing the amount of blade deformation under load. Utility Model Content

[0004] The purpose of this invention is to provide a carbon beam for the main load-bearing component of composite blades, which solves the problem of insufficient stiffness of existing carbon beams for the main load-bearing component of composite blades under limited weight requirements.

[0005] The present invention adopts the following technical solution:

[0006] A carbon beam, the main load-bearing component of a composite blade, includes, in sequence along its length, a blade root 300, a blade stalk 400, and a blade section 500; in the inner and outer directions, it is composed of a beam core 100 and a beam outer layer 200, both of which are made of carbon fiber composite material; the beam core is a solid structure; the blade root 300 is provided with a first protrusion 301, a second protrusion 302, and a third protrusion 303, the third protrusion 303 being located at the root of the beam core, the first protrusion 301 being located at the root of the beam outer layer and formed based on the third protrusion 303, and the second protrusion 302 being formed on the beam outer layer beside the third protrusion 303; the cross-sections of the first protrusion 301 and the second protrusion 302 are wedge-shaped.

[0007] Preferably, the petiole portion 400 has a cylindrical shape, and the blade portion 500 has a square box shape, with the two adopting a square-to-round transition structure.

[0008] Preferably, the outer layer 200 of the blade portion 500 gradually increases in thickness from the blade tip to the petiole.

[0009] Preferably, the outer layer 200 of the blade stalk portion 400 has the same thickness.

[0010] Furthermore, the blade portion 500 is paddle-shaped.

[0011] Preferably, the carbon fiber composite material is a carbon fiber resin material.

[0012] Furthermore, the thickness of the outer layer 200 of the blade portion 500 gradually increases from 1 mm at the blade tip towards the petiole to 7.6 mm.

[0013] Furthermore, the outer layer 200 of the spar of the petiole 400 has a thickness of 7.6 mm.

[0014] Preferably, the width of the blade portion 500 is equal.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1) The carbon beam, the main load-bearing component of the composite blade, has been improved based on the traditional carbon beam structure (clasp beam) form. The foam sandwich structure has been changed to a solid composite material structure, which improves the stiffness and load-bearing performance of the carbon beam structure.

[0017] 2) While leveraging the properties of carbon fiber, the double wedge structure at the blade root increases the ability of the carbon beam of the blade to withstand centrifugal force.

[0018] 3) Since carbon beams are solid composite material structures, in order to make their manufacturing process simple and easy to operate, and convenient to form;

[0019] 4) The blade section is designed with a layup method of equal width and variable thickness. The width of the laid material sheets is the same, but the length and outline are different. The same baseline is used for laying, which is quick and efficient, making its production and manufacturing process simple and easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the carbon beam, the main load-bearing component of the composite material blade of this utility model.

[0021] Figure 2 This is a structural schematic diagram of the beam core.

[0022] Figure 3 This is an axial sectional view of the carbon beam, the main load-bearing component of the composite material blade of this utility model.

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 This is a cross-sectional view of the blade section.

[0025] Figure 6 This is a cross-sectional view of the carbon beam structure of the existing concentric beam.

[0026] Among them, 100 is the core of the beam, 200 is the outer layer of the beam, 300 is the root of the leaf, 301 is the first protrusion, 302 is the second protrusion, 303 is the third protrusion, 400 is the petiole, and 500 is the blade. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are also described.

[0028] like Figure 1-5 As shown, a carbon beam, the main load-bearing component of a composite blade, includes a blade root 300, a blade stalk 400, and a blade 500. The carbon beam is composed of a beam core 100 and a beam outer layer 200. The beam outer layer 200 wraps around the outer periphery of the beam core 100. Both the beam core 100 and the beam outer layer 200 are made of carbon fiber material.

[0029] Specifically, the beam core 100 is made by a clasp-and-stick method, and the outer layer 200 is made by laying it on the surface of the beam core 100.

[0030] It should be noted that by creating an outer layer 200 around the core beam 100, a box-shaped sandwich structure is adopted, which enhances the stiffness of the blades compared to the traditional clasp-shaped structure. At the same time, using carbon fiber materials for both the core beam 100 and the outer layer 200 further increases the stiffness and strength of the carbon beam.

[0031] The petiole 400 has a cylindrical structure, while the blade 500 has a square box structure. The blade 500 and the petiole 400 transition from square to round.

[0032] It should be noted that the cylindrical blade shank 400 is for the convenience of the final installation of the carbon beam, while the box-shaped blade 500 is for the convenience of obtaining a box-shaped sandwich structure after installation.

[0033] Furthermore, in this embodiment, since the blade's outer surface is irregular, the carbon beam will be designed as a variable thickness, variable structure form.

[0034] The outer layer 200 of the leaf blade gradually increases in thickness from the leaf tip to the petiole. Specifically, the thickness of the outer layer 200 gradually increases from 1 mm at the leaf tip to 7.6 mm towards the petiole.

[0035] It should be noted that, as a rotating component, the blade's carbon beam mainly bears centrifugal force at the root during actual operation, hence the 400mm thicker part of the blade stalk. The blade bears aerodynamic deformation in the middle of the carbon beam, hence the thicker part of the carbon beam. The tip of the carbon beam, due to its thinner blade shape, hardly bears a large load, so a thinner design is adopted after removing the skin.

[0036] In this embodiment, the outer layer 200 of the blade of the petiole 400 has the same thickness.

[0037] Specifically, the outer layer 200 of the 400 blade of the petiole has a thickness of 7.6 mm.

[0038] It should be noted that, based on the most severe operating conditions of the blade and the corresponding load, as well as the safety factor specified in the design process, the analysis confirmed that the 7.6mm thick carbon beam can not only withstand the required design load, but also the number of layers laid during the manufacturing process can be implemented, thus balancing the weight and stiffness of the carbon beam.

[0039] See Figure 4 The outer layer 200 of the beam at the leaf root 300 is provided with a first boss 301 and a second boss 302, and the front and rear of the first boss 301 and the second boss 302 are both wedge-shaped surfaces.

[0040] Specifically, the slope angle of the wedge-shaped surface is 45°.

[0041] It should be noted that the first protrusion 301 and the second protrusion 302 at the blade root 300, in conjunction with the wedge-shaped surface structure, increase the carbon beam's ability to withstand centrifugal force.

[0042] Furthermore, the beam core 100 of the leaf root 300 is provided with a third boss 303 that mates with the first boss 301. It should be noted that this design makes it easier to lay out the first boss 301.

[0043] It should be noted that the above embodiments are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements on this basis. Without departing from the overall concept of the present utility model, these changes or improvements should all fall within the scope of protection claimed by the present utility model.

Claims

1. A carbon beam, the main load-bearing component of a composite blade, characterized in that: Along its length, it comprises a leaf root (300), a petiole (400), and a blade (500); along its inner and outer directions, it consists of a core beam (100) and an outer layer beam (200), both of which are made of carbon fiber composite material; the core beam is a solid structure. The leaf root (300) is provided with a first boss (301), a second boss (302), and a third boss (303). The third boss (303) is located at the root of the beam core, the first boss (301) is located at the root of the outer layer of the beam and is formed by imitation of the third boss (303), and the second boss (302) is formed on the outer layer of the beam next to the third boss (303). The cross-section of the first boss (301) and the second boss (302) is wedge-shaped.

2. The carbon beam, the main load-bearing component of the composite blade as described in claim 1, is characterized in that: The petiole (400) has a cylindrical shape, and the blade (500) has a square box shape. The two are transitioned from square to round.

3. The carbon beam, the main load-bearing component of the composite blade as described in claim 1, is characterized in that: The outer layer (200) of the blade portion (500) gradually increases in thickness from the blade tip to the petiole.

4. The carbon beam, the main load-bearing component of the composite blade as described in claim 1, is characterized in that: The outer layer (200) of the blade stalk (400) has the same thickness.

5. The carbon beam, the main load-bearing component of the composite blade as described in claim 4, is characterized in that: The blade section (500) is paddle-shaped.

6. The carbon beam, the main load-bearing component of the composite blade as described in claim 1, is characterized in that: The carbon fiber composite material is a carbon fiber resin material.

7. The carbon beam, the main load-bearing component of the composite blade as described in claim 3, is characterized in that: The thickness of the outer layer (200) of the blade (500) gradually increases from 1 mm at the tip to 7.6 mm towards the petiole.

8. The carbon beam, the main load-bearing component of the composite blade as described in claim 7, is characterized in that: The outer layer (200) of the petiole (400) has a thickness of 7.6 mm.

9. The carbon beam, the main load-bearing component of the composite blade as described in claim 1, is characterized in that: The widths of the blade sections (500) are equal.

Images