Composite pultrusion profile blade structure

Abstract

The invention discloses a composite material pultrusion profile blade structure, which relates to the technical field of blades, and comprises a composite material blade root, a composite material blade root rear edge reinforcing blanking cap, a composite material blade root front edge reinforcing blanking cap, a composite material blade body, a composite material supporting pipe and a metal material supporting pipe, a composite material blade body is arranged in the blade body cavity, a blade body round pipe is arranged in the blade body cavity, the composite material blade body and the blade body round pipe are integrally formed, a composite material supporting pipe is arranged in the blade body round pipe, a metal material supporting pipe is arranged in the composite material supporting pipe, and the blade body round pipe divides the blade body cavity into a front edge cavity and a rear edge cavity. The composite material blade root front edge reinforcing blanking cap is installed at an opening of the front edge cavity, the composite material blade root rear edge reinforcing blanking cap is installed at an opening of the rear edge cavity, one end of the blade body round pipe extends out of the composite material blade body, and the composite material blade root is connected with one end of the blade body round pipe. The composite pultrusion profile blade structure disclosed by the invention is firm in overall structure and not easy to break.

Description

Technical Field

[0001] The invention relates to the technical field of blades, and in particular to a composite material pultruded profile blade structure. Background Art

[0002] Air cooler fans are mainly used in petroleum, chemical and other enterprises. With the increasing requirements of the country on environmental protection and noise, my country has introduced foreign pultruded aluminum blades with no twist angle and wide chord length, which can meet the requirements of large air volume and low noise, and have the advantages of short processing cycle and simple process.

[0003] However, with the continuous development of the industry, it is necessary not only to meet the differentiated needs, but also to be low-priced and improve market competitiveness. However, the existing pultruded aluminum blades frequently break due to the increase in fan performance.

[0004] Therefore, there is an urgent need in the art for a novel composite pultruded profile blade structure to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a composite material pultruded profile blade structure to solve the problems existing in the above-mentioned prior art, and the structure is strong and not easy to break.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The invention discloses a composite pultruded profile blade structure, comprising a composite blade root, a composite blade root trailing edge reinforcement plugging cover, a composite blade root leading edge reinforcement plugging cover, a composite blade body, a composite support tube and a metal support tube, wherein the composite blade body has a blade body cavity, a blade body circular tube is provided in the blade body cavity, the composite blade body and the blade body circular tube are integrally formed, the blade body circular tube is provided in the composite support tube, the composite support tube is provided in the composite support tube, the metal support tube is provided in the composite support tube, the blade body circular tube divides the blade body cavity into a leading edge chamber and a trailing edge chamber, the composite blade root leading edge reinforcement plugging cover is installed at the opening of the leading edge chamber, the composite blade root trailing edge reinforcement plugging cover is installed at the opening of the trailing edge chamber, one end of the blade body circular tube extends out of the composite blade body, and the composite blade root is connected to one end of the blade body circular tube.

[0008] Preferably, a group of relative circular tube matching protrusions are provided on the outer wall of one end of the blade body circular tube close to the composite blade root, and a group of relative circular tube arc grooves are provided on both sides of the two circular tube matching protrusions. A trailing edge arc block is provided on the side of the composite blade root trailing edge reinforcement plugging cover close to the blade body circular tube, and a leading edge arc block is provided on the side of the composite blade root leading edge reinforcement plugging cover close to the blade body circular tube. The trailing edge arc block and the leading edge arc block are respectively installed at the two circular tube arc grooves, and the composite blade root is sleeved on the outside of the circular tube matching protrusion, the trailing edge arc block and the leading edge arc block.

[0009] Preferably, supporting diagonal ribs are provided in the trailing edge cavity.

[0010] Preferably, reinforcing ribs are provided in the leading edge cavity.

[0011] Preferably, the composite blade body is formed by pultrusion.

[0012] Preferably, the composite material blade root leading edge reinforcement plugging cover is inserted into the opening of the leading edge cavity, and the composite material blade root trailing edge reinforcement plugging cover is inserted into the opening of the trailing edge cavity.

[0013] Preferably, the composite blade root trailing edge reinforcement plugging cover, the composite blade root leading edge reinforcement plugging cover and the composite blade body are all connected to the composite blade root.

[0014] Preferably, the material of the composite blade root is glass fiber reinforced plastic;

[0015] The composite blade body is made of glass fiber polyurethane material or carbon fiber epoxy material;

[0016] The composite material blade root trailing edge reinforcement plugging cover and the composite material blade root leading edge reinforcement plugging cover are made of glass fiber reinforced plastic or carbon fiber.

[0017] Preferably, the composite material support tube is made of glass fiber polyurethane material or carbon fiber epoxy material;

[0018] The material of the metal material support tube is 40Cr.

[0019] Preferably, the composite material support tube is bonded and fixed to the blade body circular tube, and the composite material support tube is bonded and fixed to the metal material support tube.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The present invention provides a composite material support tube and a metal material support tube, and the composite material is used as the whole, so the overall structure is firm, not easy to break, and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A top view of a composite pultruded profile blade structure according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 AA section view in;

[0025] Figure 3 for Figure 1 BB section view in;

[0026] Figure 4 for Figure 3 The enlarged view of K in the figure;

[0027] Figure 5 for Figure 3 Enlarged view of L in the figure;

[0028] Figure 6 for Figure 1 CC section view in;

[0029] Figure 7 for Figure 1 DD section view in;

[0030] Figure 8 for Figure 3 The enlarged view of EE in the figure;

[0031] Fig. 9 It is a schematic structural diagram of a composite blade body in a composite pultruded profile blade structure according to an embodiment of the present invention;

[0032] Fig.10 It is a schematic structural diagram of a composite material blade root trailing edge reinforcement plugging cover in a composite material pultruded profile blade structure according to an embodiment of the present invention;

[0033] Fig.11 It is a schematic structural diagram of a composite material blade root leading edge reinforcement plugging cover in a composite material pultruded profile blade structure according to an embodiment of the present invention;

[0034] Fig.12 It is a schematic structural diagram of a composite blade root in a composite pultruded profile blade structure according to an embodiment of the present invention;

[0035] In the figure: 1-composite material blade root; 2-composite material blade root trailing edge reinforcement plugging cover; 3-composite material blade root leading edge reinforcement plugging cover; 4-composite material blade body; 5-composite material support tube; 6-metal material support tube; 7-support oblique rib; 8-reinforcement rib; 9-blade body circular tube. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The object of the present invention is to provide a composite material pultruded profile blade structure to solve the problems existing in the above-mentioned prior art, and the structure is strong and not easy to break.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1-Figure 12 As shown, the present invention provides a composite pultruded profile blade structure, including a composite blade root 1, a composite blade root trailing edge reinforcement plugging cover 2, a composite blade root leading edge reinforcement plugging cover 3, a composite blade body 4, a composite support tube 5 and a metal support tube 6. The specific shape of the composite blade body 4 is as follows Fig. 9As shown, the composite blade 4 has a blade cavity, and the thickness of each part is the same, that is, the airfoil surface is designed with equal thickness. A blade circular tube 9 is provided in the blade cavity, and the composite blade 4 and the blade circular tube 9 are integrally formed, and the outer surface of the blade circular tube 9 is tangent to the corresponding position of the inner wall of the composite blade 4. A composite support tube 5 is provided in the blade circular tube 9, and the inner wall of the blade circular tube 9 fits the outer wall of the composite support tube 5. A metal support tube 6 is provided in the composite support tube 5, and the outer wall of the metal support tube 6 fits the inner wall of the composite support tube 5, thereby increasing the contact area, improving the connection strength of the composite blade root 1 and the composite blade 4 at the transition position, and solving the problem of insufficient strength of the composite material transition area. The composite blade 4 partially extends to the composite blade root 1. When the blade is installed with the hub, under the action of the bolt preload, friction can be generated to overcome the centrifugal force of the blade during operation and improve the connection strength of the composite blade root 1. The blade body circular tube 9 divides the blade body cavity into a leading edge chamber and a trailing edge chamber. The leading edge chamber is near the leading edge of the composite blade body 4, and the trailing edge chamber is near the composite blade body 4. The blade tips of the leading edge chamber and the trailing edge chamber are closed structures, and the blade root end is an open structure. The composite blade root leading edge reinforcement plug 3 is installed at the opening of the leading edge chamber, and the composite blade root trailing edge reinforcement plug 2 is installed at the opening of the trailing edge chamber. One end of the blade body circular tube 9 extends out of the composite blade body 4, and the composite blade root 1 is connected to one end of the blade body circular tube 9 extending out of the composite blade body 4.

[0040] In the actual installation process, the composite blade body 4 is first manufactured according to the needs, and then the composite support tube 5 is installed in the blade body circular tube 9, and the metal support tube 6 is installed in the composite support tube 5, and finally the composite blade root 1 is installed.

[0041] In this embodiment, the composite blade root trailing edge reinforcement plugging cover 2 , the composite blade root leading edge reinforcement plugging cover 3 and the composite blade body 4 are all connected to the composite blade root 1 .

[0042] In this embodiment, the specific connection relationship of the composite blade root 1 is as follows: Figure 9-12As shown, a group of relative circular tube matching protrusions are provided on the outer wall of one end of the blade body circular tube 9 close to the composite blade root 1, and the circular tube matching protrusions are a part of the extension of the composite blade body 4. A group of relative circular tube arc grooves are provided on both sides of the two circular tube matching protrusions, and a rear edge arc block is provided on the side of the composite blade root trailing edge reinforcement plugging cover 2 close to the blade body circular tube 9, and a front edge arc block is provided on the side of the composite blade root leading edge reinforcement plugging cover 3 close to the blade body circular tube 9. When installing, the trailing edge arc block and the front edge arc block are respectively installed at the two circular tube arc grooves, and the two circular tube matching protrusions, the trailing edge arc block and the front edge arc block can form a complete annular structure, and match the inner ring shape of the composite blade root 1. Finally, the composite blade root 1 is sleeved on the outside of the circular tube matching protrusion, the trailing edge arc block and the front edge arc block. The fixing method between the composite blade root 1 and the outer sides of the circular tube matching protrusion, the trailing edge arc block and the leading edge arc block can be conventional bonding; or the composite blade root 1 can be pressed by a mold, so that the composite blade root 1 can be directly pressed and formed on the outer sides of the circular tube matching protrusion, the trailing edge arc block and the leading edge arc block, and form an integrated structure with them, thereby enhancing the connection strength between the composite blade body 4 and the composite blade root 1.

[0043] In this embodiment, if Figure 4 and Fig. 9 As shown, a supporting oblique rib 7 is provided in the trailing edge cavity, and its direction is the same as the force direction, so as to improve the stiffness of the composite blade 4.

[0044] In this embodiment, if Figure 5 and Fig. 9 As shown, a reinforcing rib 8 is provided in the leading edge cavity to prevent local instability during the force application process.

[0045] In this embodiment, the composite blade body 4 is formed by pultrusion.

[0046] In this embodiment, the composite blade root leading edge reinforcement plugging cover 3 is inserted into the opening of the leading edge cavity, and the composite blade root trailing edge reinforcement plugging cover 2 is inserted into the opening of the trailing edge cavity.

[0047] In this embodiment, the material of the composite blade root 1 includes but is not limited to existing fiberglass reinforced plastics.

[0048] The composite blade body 4 is the main component of the blade to generate airflow, so it needs to have sufficient strength and rigidity. The composite blade body 4 can be made of glass fiber polyurethane material or carbon fiber epoxy material, preferably unidirectional glass fiber polyurethane material or unidirectional carbon fiber epoxy material.

[0049] The composite material blade root trailing edge reinforcement plugging cover 2 and the composite material blade root leading edge reinforcement plugging cover 3 are made of glass fiber reinforced plastic or carbon fiber.

[0050] In this embodiment, the material of the composite material support tube 5 is the same as that of the composite material blade body 4 , which is also glass fiber polyurethane material or carbon fiber epoxy material.

[0051] The metal material support tube 6 plays a supporting role inside the composite material support tube 5 . The elastic modulus of the metal material support tube 6 is greater than the elastic modulus of the composite material support tube 5 . The material of the metal material support tube 6 is 40Cr (40 chromium).

[0052] In this embodiment, the composite material support tube 5 is bonded and fixed to the blade body circular tube 9, and the composite material support tube 5 is bonded and fixed to the metal material support tube 6, so that each part can be bonded into a whole, thereby effectively improving the overall strength.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A composite pultruded profile blade structure, characterized in that: It includes a composite blade root, a composite blade root trailing edge reinforcement plugging cover, a composite blade root leading edge reinforcement plugging cover, a composite blade body, a composite support tube and a metal support tube. The composite blade body has a blade body cavity, a blade body circular tube is provided in the blade body cavity, the composite blade body and the blade body circular tube are integrally formed, the blade body circular tube is provided in the composite support tube, the composite support tube is provided in the composite support tube, the blade body circular tube divides the blade body cavity into a leading edge chamber and a trailing edge chamber, the composite blade root leading edge reinforcement plugging cover is installed at the opening of the leading edge chamber, the composite blade root trailing edge reinforcement plugging cover is installed at the opening of the trailing edge chamber, one end of the blade body circular tube extends out of the composite blade body, and the composite blade root is connected to one end of the blade body circular tube.

2. The composite pultruded profile blade structure according to claim 1, characterized in that: The composite blade root trailing edge reinforcement plugging cover, the composite blade root leading edge reinforcement plugging cover and the composite blade body are all connected to the composite blade root.

3. The composite pultruded profile blade structure according to claim 2, characterized in that: A group of relative circular tube matching protrusions are provided on the outer wall of one end of the blade body circular tube close to the composite blade root, and a group of relative circular tube arc grooves are provided on both sides of the two circular tube matching protrusions. A trailing edge arc block is provided on the side of the composite blade root trailing edge reinforcement plugging cover close to the blade body circular tube, and a leading edge arc block is provided on the side of the composite blade root leading edge reinforcement plugging cover close to the blade body circular tube. The trailing edge arc block and the leading edge arc block are respectively installed at the two circular tube arc grooves, and the composite blade root is sleeved on the outer sides of the circular tube matching protrusion, the trailing edge arc block and the leading edge arc block.

4. The composite pultruded profile blade structure according to claim 1, characterized in that: The trailing edge cavity is provided with supporting oblique ribs.

5. The composite pultruded profile blade structure according to claim 1, characterized in that: The leading edge cavity is provided with reinforcing ribs.

6. The composite pultruded profile blade structure according to claim 1, characterized in that: The composite blade body is formed by pultrusion.

7. The composite pultruded profile blade structure according to claim 1, characterized in that: The composite material blade root leading edge reinforcement plugging cover is inserted into the opening of the leading edge cavity, and the composite material blade root trailing edge reinforcement plugging cover is inserted into the opening of the trailing edge cavity.

8. The composite pultruded profile blade structure according to claim 1, characterized in that: The material of the composite blade root is glass fiber reinforced plastic; The composite blade body is made of glass fiber polyurethane material or carbon fiber epoxy material; The composite material blade root trailing edge reinforcement plugging cover and the composite material blade root leading edge reinforcement plugging cover are made of glass fiber reinforced plastic or carbon fiber.

9. The composite pultruded profile blade structure according to claim 1, characterized in that: The composite material support tube is made of glass fiber polyurethane material or carbon fiber epoxy material; The material of the metal material support tube is 40Cr.

10. The composite pultruded profile blade structure according to claim 1, characterized in that: The composite material support tube is bonded and fixed to the blade body circular tube, and the composite material support tube is bonded and fixed to the metal material support tube.

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