Wind power impeller capable of improving power generation efficiency

Abstract

The wind power impeller comprises an impeller shaft and a plurality of impeller units, each impeller unit adopts a solid geometry design and comprises a front blade part and a rear blade part, the front blade part and the rear blade part are both in a vortex surface shape, and the end, away from the impeller shaft, of the front blade part is fixedly connected with the end, away from the impeller shaft, of the rear blade part. A gap is reserved between the front blade part and the rear blade part, so that a first air duct is formed, and a second air duct is formed between every two adjacent impeller units; reinforcing structures are fixedly arranged between the adjacent impeller units and between the front blade part and the rear blade part which are adjacent. The power generation efficiency can be greatly improved, the power generation device is not prone to damage, the size can be designed to be larger, the applicability is higher, meanwhile, limitation on material requirements due to the structure, the size and the like in the prior art is solved, and therefore production and application are better facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine impellers, and in particular to a wind turbine impeller capable of improving power generation efficiency. Background Art

[0002] The current high energy prices and the greenhouse gas emissions caused by human use of chemical energy have caused global warming to become increasingly serious. Therefore, the development and utilization of clean energy such as wind power generation has become the future of mankind. However, there are some shortcomings in the blades of wind turbines:

[0003] 1. Due to the limitations of geometric design defects and material weight, the wind-catching efficiency is low, and therefore the wind energy utilization rate is low. At present, the actual efficiency of wind turbines is generally less than 40%. The actual efficiency of small wind turbines is even lower than 25%;

[0004] 2. The starting wind speed is high and the stopping wind speed is low. Because the wind-fighting efficiency is low, the wind power of 3 meters per second cannot generate electricity. In addition, since the needle-shaped blades are easy to fold, the brakes must be applied to stop power generation to protect the blades at high wind speeds. This greatly reduces the wind power utilization range and increases the cost of the wind turbine (because the speed needs to be limited, an expensive transmission is required);

[0005] 3. The length of wind turbine blades (which is the factor that determines the size of the wind field) is limited by the contradiction between material weight and blade size. It is difficult to increase the length of the blades. The longer the blades, the heavier the weight. However, the needle-shaped blades currently used in reality cannot bear too much weight because of the contradiction between material strength and density. For example, the current 6-megawatt wind turbine blades, made of lightweight materials such as glass fiber or carbon fiber, require 70 tons.

[0006] 4. High construction cost;

[0007] 5. The transportation and installation are difficult and costly. The blades, which are dozens or hundreds of meters long, need to be formed in one go in a large factory. The transportation requires special roads and special vehicles. The installation requires special large equipment and is dangerous (because of the integrated installation, the interference of wind creates many dangerous factors);

[0008] The above reasons lead to:

[0009] 1. my country's small wind turbines are like chicken ribs. At present, my country's small wind power generation cannot meet household electricity needs, and it is necessary to waste huge amounts of money to add solar photovoltaics to form wind and solar complementarity to barely meet the electricity needs of a single household. This situation has not been well received by those who have used it, so it has become a chicken rib. However, in Northwest my country, especially in mobile pastoral areas without power grids, there is a great demand for wind power generation.

[0010] 2. The high cost and difficulty of construction of large-scale generators have resulted in high barriers to entry for the industry, limiting the participation of small and medium-sized enterprises; low power generation efficiency has resulted in low investment returns and a long investment payback period, limiting development. Summary of the invention

[0011] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a wind impeller that can improve the power generation efficiency.

[0012] In order to solve the above technical problems, the technical solution provided by the present invention is a wind impeller that can improve the power generation efficiency: it includes an impeller shaft, and a plurality of impeller units uniformly fixed along the circumferential direction of the impeller shaft, the impeller unit adopts a three-dimensional geometric design, including a front blade part and a rear blade part, the front blade part and the rear blade part are both vortex surface-shaped, the end of the front blade part away from the impeller shaft is fixed together with the end of the rear blade part away from the impeller shaft, and a gap is left between the front blade part and the rear blade part, thereby forming an air duct one, and an air duct two is formed between adjacent impeller units; a reinforcing structure is fixed between adjacent impeller units and between adjacent front blade parts and rear blade parts.

[0013] Furthermore, the wind impeller is integrally formed.

[0014] Furthermore, the number of the impeller units is no less than 3.

[0015] Furthermore, the number of the impeller units is 3.

[0016] Furthermore, the reinforcement structure includes connecting ring 1 and connecting ring 2, both of which are coaxial with the impeller shaft. Connecting ring 1 passes through the middle of each impeller unit in turn, and connecting ring 2 is arranged at the end of the impeller unit away from the impeller shaft.

[0017] Furthermore, the reinforcement structure includes a connecting ring three and a plurality of connecting rods, wherein the connecting ring one is coaxial with the impeller shaft, the connecting ring one passes through the middle of each impeller unit in turn, the connecting rod is arranged between adjacent impeller units away from the impeller shaft end, and the connecting rod is bent in an arc shape.

[0018] Furthermore, the impeller shaft adopts a tubular structure to reduce weight, and connecting brackets are fixedly connected to both ends of the impeller shaft.

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. The optimized three-dimensional geometric design of the present invention greatly improves the wind-catching efficiency and power generation efficiency, solves the problem that small wind turbines cannot meet household electricity needs, and shortens the blade length;

[0021] 2. The three-dimensional geometric design integrates the entire impeller, improves the structural strength, breaks through the contradiction between the size of the wind field and the weight of the material, and can be designed in a larger size, breaking through the size limitation;

[0022] 3. The structure of this design can choose more materials to build, reducing weight restrictions.

[0023] 4. Reduce costs and manufacturing difficulties, allowing more small and medium-sized enterprises to participate in the environmental protection energy industry.

[0024] 5. It has improved power generation efficiency, promoted the development of my country's small wind power industry, increased the return on investment of wind power, shortened the payback time of wind power investment, and promoted hot investment in the wind industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of a wind turbine impeller capable of improving power generation efficiency according to Embodiment 1 of the present invention is shown in FIG. Figure 1 .

[0026] Figure 2 The structure of a wind turbine impeller capable of improving power generation efficiency according to Embodiment 1 of the present invention is shown in FIG. Figure 2 .

[0027] Figure 3 This is a schematic diagram of the structure of a wind turbine impeller that can improve power generation efficiency according to Embodiment 2 of the present invention. Figure 1 .

[0028] Figure 4 This is a schematic diagram of the structure of a wind turbine impeller that can improve power generation efficiency according to Embodiment 2 of the present invention. Figure 2 .

[0029] As shown in the figure:

[0030] 1. Impeller shaft, 2. Connecting bracket, 3. Front blade part, 4. Rear blade part, 5. Connecting ring 1, 6. Connecting ring 2, 7. Connecting ring 3, 8. Connecting rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Embodiment 1, in combination with Figure 1-2A wind impeller capable of improving power generation efficiency comprises an impeller shaft 1 and a plurality of impeller units uniformly fixedly connected along the circumferential direction of the impeller shaft 1. The impeller unit adopts a three-dimensional geometric design and comprises a front blade part 3 and a rear blade part 4. The front blade part 3 and the rear blade part 4 are both vortex surface-shaped. The end of the front blade part 3 away from the impeller shaft 1 is fixedly connected with the end of the rear blade part 4 away from the impeller shaft 1. A gap is left between the front blade part 3 and the rear blade part 4 to form an air duct one, and an air duct two is formed between adjacent impeller units. A reinforcing structure is fixedly provided between adjacent impeller units and between adjacent front blade parts 3 and rear blade parts 4.

[0033] The wind impeller is integrally formed.

[0034] The number of the impeller units is 3.

[0035] The impeller shaft 1 adopts a tubular structure to reduce weight, and connecting brackets 2 are fixedly connected to both ends of the impeller shaft 1.

[0036] The reinforcement structure includes a connecting ring 1 5 and a connecting ring 2 6. The connecting ring 1 5 and the connecting ring 2 6 are both coaxial with the impeller shaft 1. The connecting ring 1 5 passes through the middle of each impeller unit in turn, and the connecting ring 2 6 is arranged at the end of the impeller unit away from the impeller shaft 1.

[0037] Embodiment 2, in combination with Figure 3-4 A wind impeller capable of improving power generation efficiency comprises an impeller shaft 1 and a plurality of impeller units uniformly fixedly connected along the circumferential direction of the impeller shaft 1. The impeller unit adopts a three-dimensional geometric design and comprises a front blade part 3 and a rear blade part 4. The front blade part 3 and the rear blade part 4 are both vortex surface-shaped. The end of the front blade part 3 away from the impeller shaft 1 is fixedly connected with the end of the rear blade part 4 away from the impeller shaft 1. A gap is left between the front blade part 3 and the rear blade part 4 to form an air duct one, and an air duct two is formed between adjacent impeller units. A reinforcing structure is fixedly provided between adjacent impeller units and between adjacent front blade parts 3 and rear blade parts 4.

[0038] The wind impeller is integrally formed.

[0039] The number of the impeller units is 3.

[0040] The impeller shaft 1 adopts a tubular structure to reduce weight, and connecting brackets 2 are fixedly connected to both ends of the impeller shaft 1.

[0041] The reinforcement structure includes a connecting ring three 7 and multiple connecting rods 8. The connecting ring one 5 is coaxial with the impeller shaft 1. The connecting ring one 5 passes through the middle of each impeller unit in turn. The connecting rod 8 is arranged between adjacent impeller units at the end away from the impeller shaft 1. The connecting rod 8 is bent in an arc shape.

[0042] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0045] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A wind turbine impeller capable of improving power generation efficiency, comprising an impeller shaft (1), and a plurality of impeller units uniformly fixedly connected along the circumferential direction of the impeller shaft (1), characterized in that: The impeller unit adopts a three-dimensional geometric design, comprising a front blade part (3) and a rear blade part (4), wherein the front blade part (3) and the rear blade part (4) are both vortex surface-shaped, the end of the front blade part (3) away from the impeller shaft (1) and the end of the rear blade part (4) away from the impeller shaft (1) are fixedly connected together, and a gap is left between the front blade part (3) and the rear blade part (4), thereby forming an air duct one, and an air duct two is formed between adjacent impeller units; A reinforcement structure is fixedly provided between adjacent impeller units and between adjacent front blade parts (3) and rear blade parts (4).

2. A wind turbine that can improve power generation efficiency according to claim 1, characterized in that: The wind impeller is integrally formed.

3. A wind turbine blade capable of improving power generation efficiency according to claim 1, characterized in that: The number of the impeller units is no less than 3.

4. A wind turbine impeller capable of improving power generation efficiency according to claim 3, characterized in that: The number of the impeller units is 3.

5. A wind turbine blade capable of improving power generation efficiency according to claim 2, characterized in that: The reinforcement structure comprises a connecting ring 1 (5) and a connecting ring 2 (6), wherein the connecting ring 1 (5) and the connecting ring 2 (6) are both coaxial with the impeller shaft (1), the connecting ring 1 (5) passes through the middle of each impeller unit in sequence, and the connecting ring 2 (6) is arranged at the end of the impeller unit away from the impeller shaft (1).

6. A wind turbine blade capable of improving power generation efficiency according to claim 2, characterized in that: The reinforcement structure comprises a connecting ring three (7) and a plurality of connecting rods (8); the connecting ring one (5) is coaxial with the impeller shaft (1); the connecting ring one (5) passes through the middle of each impeller unit in sequence; the connecting rod (8) is arranged at the end away from the impeller shaft (1) between adjacent impeller units; and the connecting rod (8) is bent in an arc shape.

7. A wind turbine blade capable of improving power generation efficiency according to claim 1, characterized in that: The impeller shaft (1) adopts a tubular structure to reduce weight, and connecting brackets (2) are fixedly connected to both ends of the impeller shaft (1).

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