Wind power generation blade with reinforcing structure

Abstract

The utility model discloses a wind power generation blade with a reinforcing structure, which comprises a base, a transfer block and a fan blade which are connected in sequence, and the fan blade mainly consists of a skin and an inhaul cable mechanism arranged in the skin; the inhaul cable mechanism comprises an inhaul cable, one end of the inhaul cable is connected with the inner wall of the transfer block through a flange, and the other end of the inhaul cable is connected with the skin inner wall away from one side of the transfer block. According to the product, the first inhaul cable, the second inhaul cable, the third inhaul cable and the fourth inhaul cable are arranged in the skin in a staggered mode, the characteristics of light weight and high strength of the inhaul cable mechanism are utilized, huge centrifugal force generated at the tail end of the inhaul cable mechanism when the fan blade rotates is conducted to the transfer block, the overall weight of the fan blade is reduced, and meanwhile the service life of the fan blade is prolonged. And the strength of the fan blade and the toughness of the blade are ensured. In conclusion, the utility model has the characteristics of lower cost, higher strength and long expected service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation blades, and particularly relates to a wind power generation blade with a reinforcement structure. Background Art

[0002] The earliest traditional wind power generation blades were directly processed from wood, and then evolved through aluminum alloy, stainless steel, plastic, to composite materials. With the increase in the size of wind power generation blades, it is necessary to strengthen the strength of the materials, reduce the wall thickness to reduce the weight, and provide blades for the main support of wind power generation units with light weight and high strength. The blade skin is composed of two layers, the ventral and dorsal layers, sandwiching the main frame. The ventral and dorsal layers of the skin are composed of preformed fiberglass sheets by lamination method, and the voids are filled with adhesives. The blade is integrally formed, and there are solid foam bodies composed of vinyl chloride on the inner surface of the skin and the front and rear ends of the main frame.

[0003] Chinese patent "A Wind Power Generation Blade" (Patent No. 200920115193.X, Publication Date: May 26, 2010) mainly includes a blade body, which is composed of a rigid foam core and a composite layer of fiberglass fabric and basalt fiber fabric coated outside the rigid foam core. This wind power generation blade boldly adopts the idea of using a rigid sandwich foam in the middle layer, and is formed by composite multi-layer sewing fabrics, without bonding seams and fatigue vulnerable points, solving the problems of complex structure, large weight, poor strength, and low power generation efficiency of traditional wind power generation blades, and achieving true light weight and high strength.

[0004] Existing devices usually use materials with different structures on the skin of the blade to reduce the weight of the blade and improve the strength of the blade, but this method has high requirements for the strength and weight of the materials, and lacks a structure that can withstand the centrifugal force during the rotation of the blade to reduce the use cost. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a wind power generation blade with a reinforcement structure, which has low cost, high strength, and long expected service life.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A wind power generation blade with a reinforcement structure includes a base, a transfer block, and a fan blade connected in sequence. The fan blade mainly consists of a skin and a cable mechanism arranged inside the skin; the cable mechanism includes cables, one end of the cable is connected to the inner wall of the transfer block through a flange, and the other end of the cable is connected to the inner wall of the skin on the side away from the transfer block through a flange.

[0008] The cable mechanism includes a first cable, a second cable, a third cable and a fourth cable; the starting ends of the first cable and the second cable are fixedly connected to the flange of the left side wall inside the skin, and the ends of the first cable and the second cable are fixedly connected to the flange of the right side wall inside the transfer block; the starting ends of the third cable and the fourth cable are fixedly connected to the flange of the right side wall inside the skin, and the ends of the third cable and the fourth cable are fixedly connected to the flange of the left side wall inside the transfer block.

[0009] The base comprises a base, a first leaf rod and a second leaf rod which are connected in sequence.

[0010] The cross sections of the base, the first leaf stem and the second leaf stem are in a water drop shape.

[0011] The base, the first blade rod and the second blade rod are formed by weaving ultralight magnesium alloy wire and carbon fiber, and a transverse web is arranged at the connection between the base, the first blade rod and the second blade rod.

[0012] The transfer block is fixedly connected to one side of the second blade rod, and a thickened web is arranged between the transfer block and the second blade rod.

[0013] The skin is composed of an outer shell, a first inner liner, a second inner liner and a filling layer from outside to inside.

[0014] The outer shell and the first lining are carbon fiber and glass fiber respectively, and the outer layer of the skin is formed by weaving and stacking the outer shell and the first lining; the second lining is woven by ultra-light magnesium alloy wire, and the filling layer is composed of a carbon fiber woven layer and an epoxy resin layer stacked together.

[0015] In view of the problems existing in traditional wind turbine blades, the inventor has designed a wind turbine blade with an enhanced structure, including a base, a transfer block and a fan blade connected in sequence. The fan blade is mainly composed of a skin and a cable mechanism arranged in the skin; the cable mechanism includes a cable, one end of which is connected to the inner wall of the transfer block through a flange, and the other end of the cable is connected to the inner wall of the skin away from the transfer block through a flange. The product arranges the first cable, the second cable, the third cable and the fourth cable in an interlaced manner inside the skin, and utilizes the characteristics of the cable mechanism itself, which is light in weight and high in strength, to transmit the huge centrifugal force generated at the end of the cable mechanism when the fan blade rotates to the transfer block, thereby reducing the overall weight of the fan blade while ensuring the strength of the fan blade and the toughness of the blade. In summary, the utility model has the characteristics of low cost, high strength and long expected service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a wind turbine blade with a reinforced structure according to the utility model.

[0017] Figure 2 for Figure 1Partial structural schematic diagram of a wind power blade with an enhanced structure.

[0018] Figure 3 is Figure 1 Cross-sectional view of the cable mechanism in a wind power blade with an enhanced structure.

[0019] Figure 4 is Figure 1 Cross-sectional view of the fan blade in a wind power blade with an enhanced structure.

[0020] In the figure: 1, base; 101, base plate; 102, first blade rod; 103, second blade rod; 2, transfer block; 3, cable mechanism; 301, skin; 302, first cable; 303, second cable; 304, third cable; 305, fourth cable; 306, flange; 307, outer shell; 308, first inner lining; 309, second inner lining; 310, filling layer. Detailed implementation mode

[0021] I. Basic structure

[0022] As Figures 1 to 4 shown, the wind power blade of the present utility model with an enhanced structure includes a base 1, a transfer block 2 and a fan blade connected in sequence. The fan blade is mainly composed of a skin 301 and a cable mechanism 3 arranged inside the skin. Among them.

[0023] The base includes a base plate 101, a first blade rod 102 and a second blade rod 103 connected in sequence. The base plate, the first blade rod and the second blade rod are woven from ultra-light magnesium alloy wires and carbon fibers, and a transverse web is provided at the connection of the base plate, the first blade rod and the second blade rod. The transfer block is fixedly connected to one side of the second blade rod, and a thickened web is provided between the transfer block and the second blade rod.

[0024] The skin is composed of an outer shell 307, a first inner lining 308, a second inner lining 309 and a filling layer 310 from outside to inside. The outer shell and the first inner lining are carbon fiber and glass fiber respectively, and the outer layer of the skin is formed by weaving and stacking the outer shell and the first inner lining; the second inner lining is woven from ultra-light magnesium alloy wires, and the filling layer is formed by stacking a carbon fiber woven layer and an epoxy resin layer.

[0025] The cable mechanism includes a first cable 302, a second cable 303, a third cable 304 and a fourth cable 305; the starting ends of the first cable and the second cable are fixedly connected to the flange 306 on the left inner wall of the skin, and the ending ends of the first cable and the second cable are fixedly connected to the flange on the right inner wall of the transfer block; the starting ends of the third cable and the fourth cable are fixedly connected to the flange on the right inner wall of the skin, and the ending ends of the third cable and the fourth cable are fixedly connected to the flange on the left inner wall of the transfer block.

[0026] The cross-sections of the base, the first blade rod, and the second blade rod are designed in a water droplet shape. On the one hand, the water droplet shape conforms to the principles of aerodynamics and can reduce the wind resistance when the fan blades rotate; on the other hand, the head of the water droplet shape is thicker and the tail is thinner. A thicker part is used to bear most of the forces generated during the rotation of the blades, which can reduce the weight of the fan blades while ensuring sufficient strength to support the overall weight of the fan blades and the centrifugal force generated during rotation.

[0027] Among them, the glass fiber can be the glass fiber with a diameter of 15 - 20 mm produced by Shandong Fiberglass Group;

[0028] The carbon fiber is a carbon fiber composite board processed and prepared by Shandong Zhuoliou Carbon Fiber Products Co., Ltd., and the thickness of the carbon fiber composite board is 10 mm;

[0029] The ultra-light magnesium alloy wire can be the AZ61A magnesium alloy produced by Shanghai Miji Magnesium Industry Co., Ltd., which contains approximately 6% aluminum, 1% zinc, and trace amounts of silicon, copper, iron, nickel, and other elements, and the diameter of the ultra-light magnesium alloy wire is 10 - 15 mm.

[0030] II. Working Principle

[0031] During use, first connect the starting ends of the first cable and the second cable to the flange on the left inner wall inside the skin, and then fixedly connect the ending ends of the first cable and the second cable to the flange on the right inner wall inside the transfer block.

[0032] Next, stagger the third cable and the fourth cable with the first cable and the second cable, fixedly connect the starting ends of the third cable and the fourth cable to the flange on the right inner wall inside the skin, and fixedly connect the ending ends of the third cable and the fourth cable to the flange on the left inner wall inside the transfer block to complete the fixed installation of the cables inside the skin.

[0033] Finally, fixedly install the second blade rod on the rotating shaft of the wind turbine. When the entire power generation blade rotates, the cable mechanism is at a relatively far position from the axis and generates the maximum centrifugal force, which has relatively high requirements for the material weight and structural strength of the cable mechanism. By arranging the first cable, the second cable, the third cable, and the fourth cable inside the skin and the transfer block, and using the diagonal tension method to connect the left and right inner walls of the skin to the flanges inside the transfer block through the first cable, the second cable, the third cable, and the fourth cable. When the power generation blade rotates, a part of the huge centrifugal force at the tip of the skin is conducted to the transfer block through the cable mechanism, and is jointly borne by the transfer block and the base, reducing the overall load of the cable mechanism and increasing the service life of the power generation blade.

Claims

1. A wind turbine blade with a reinforced structure, comprising a base, a transfer block and a fan blade connected in sequence, characterized in that: The fan blade is mainly composed of a skin and a cable mechanism arranged in the skin; the cable mechanism includes a cable, one end of the cable is connected to the inner wall of the transfer block through a flange, and the other end of the cable is connected to the inner wall of the skin away from the transfer block through a flange.

2. The wind turbine blade according to claim 1, characterized in that: The cable mechanism includes a first cable, a second cable, a third cable and a fourth cable; the starting ends of the first cable and the second cable are fixedly connected to the flange of the left side wall inside the skin, and the ends of the first cable and the second cable are fixedly connected to the flange of the right side wall inside the transfer block; the starting ends of the third cable and the fourth cable are fixedly connected to the flange of the right side wall inside the skin, and the ends of the third cable and the fourth cable are fixedly connected to the flange of the left side wall inside the transfer block.

3. The wind turbine blade according to claim 1, characterized in that: The base comprises a pedestal, a first leaf rod and a second leaf rod which are connected in sequence.

4. The wind turbine blade according to claim 3, characterized in that: The base, the first blade rod and the second blade rod are formed by weaving ultralight magnesium alloy wire and carbon fiber, and a transverse web is arranged at the connection between the base, the first blade rod and the second blade rod.

5. The wind turbine blade according to claim 4, characterized in that: The transfer block is fixedly connected to one side of the second blade rod, and a thickened web is arranged between the transfer block and the second blade rod.

6. The wind turbine blade according to claim 1, characterized in that: The skin is composed of an outer shell, a first inner liner, a second inner liner and a filling layer from outside to inside.

7. The wind turbine blade according to claim 6, characterized in that: The outer shell and the first lining are carbon fiber and glass fiber respectively, and the outer layer of the skin is formed by weaving and stacking the outer shell and the first lining; the second lining is woven by ultra-light magnesium alloy wire, and the filling layer is composed of a carbon fiber woven layer and an epoxy resin layer stacked together.

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