Current collector, wind turbine assembly and wind turbine plant
By creating a low-pressure zone in the collector to delay airflow separation, the performance improvement problem under the space constraints of the collector was solved, and the power generation power and efficiency of the wind turbine components were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GD MIDEA AIR CONDITIONING EQUIP CO LTD
- Filing Date
- 2025-01-06
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, increasing the overall structural size of wind turbine components to improve power generation can lead to problems such as increased costs, reduced reliability, increased safety risks, and noise pollution. Meanwhile, optimizing collector performance is limited by space constraints and cannot be further improved.
Without changing the overall size of the collector, a low-pressure zone is formed between the flange section and the expansion section to delay airflow separation and increase power generation.
It achieves a more than 3% increase in wind turbine component power generation, improved airflow utilization efficiency, reduced flow resistance, and enhanced wind energy conversion efficiency without increasing the external size of the collector.
Smart Images
Figure CN122345075A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wind turbine technology, and more particularly to collectors, wind turbine components, and wind turbine equipment. Background Technology
[0002] In the development of the wind turbine component industry, achieving a balance between small size and high power generation has always been a significant challenge. Currently, to further increase the power generation of wind turbine components based on relatively optimized rotor design, there are two main traditional methods: increasing the overall turbine size and optimizing collector performance. While increasing the overall turbine size may improve power generation to some extent, it also introduces a series of problems, including but not limited to a significant increase in cost, a potential decrease in equipment reliability, increased safety risks, reduced installability, and exacerbated noise pollution. Therefore, simply increasing the overall turbine size to achieve high power generation is not ideal. The second method involves optimizing collector performance to improve power generation. However, in practical applications, due to the spatial limitations of the collector, it is difficult to improve collector performance while keeping the axial dimension (width) constant. Directly increasing the collector's outlet expansion angle can actually lead to a performance decrease. Summary of the Invention
[0003] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a collector that, while maintaining the overall size of the collector, forms a low-pressure zone between the flange section and the second end of the expansion section, preventing premature separation of the airflow inside the collector, thereby achieving the effect of increasing power generation.
[0004] This application also proposes a wind turbine component.
[0005] This application also proposes a wind turbine device.
[0006] The current collector according to the first aspect of the present application includes: The collector body includes a converging section and an expanding section, the expanding section being connected to the converging section, the converging section and the expanding section forming a collecting channel, an air inlet being provided at the first end of the converging section, and a second end of the converging section being connected to the first end of the expanding section, wherein the diameter of the collector body gradually decreases along the direction from the first end of the converging section to the second end of the converging section, and the diameter of the collector body gradually increases along the direction from the first end of the expanding section to the second end of the expanding section; A flange section is connected to the side of the collector body away from the collector channel, and the flange section is located between the first end of the expansion section and the second end of the expansion section.
[0007] According to the embodiments of this application, the collector forms a low-pressure zone on the side away from the collector channel through the flange section and the expansion section, so that the airflow inside the collector will not separate prematurely, thereby achieving the effect of increasing power generation.
[0008] According to one embodiment of this application, the axial dimension of the collector body is width B, and the axial dimension of the flange section between the connection of the expansion section and the second end of the expansion section is width B1, wherein 0.05B <B1<0.25B。
[0009] According to one embodiment of this application, the line connecting the first end of the expansion section and the second end of the expansion section is a line segment OC, and the angle between the line segment OC and the axis of the collector is the outlet expansion angle β', where 2°<β'<5°.
[0010] According to one embodiment of this application, the diameter of the first end of the expansion segment is D1, and the diameter of the second end of the expansion segment is D2, wherein the diameter D2 is greater than the diameter D1.
[0011] According to one embodiment of this application, the line connecting the second end of the contraction section and the first end of the contraction section is line segment OA, and the angle between line segment OA and the axis of the collector is the inlet contraction angle α', wherein 2°<α'<5°.
[0012] According to one embodiment of this application, the diameter of the first end of the contraction segment is D0, and the diameter of the second end of the contraction segment is D1, wherein the diameter D0 is greater than the diameter D1.
[0013] According to one embodiment of this application, the path between the first end of the contraction segment and the second end of the contraction segment is a curve or a straight line; And / or, The path between the first end of the expansion segment and the second end of the expansion segment is a curve or a straight line.
[0014] According to one embodiment of this application, the flange section is perpendicular to the axial direction of the collector.
[0015] The wind turbine assembly according to the second aspect of the present application includes the above-described collector; An impeller is located axially on the main body of the collector.
[0016] The wind turbine equipment according to the third aspect of this application includes the above-described collector.
[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the current collector provided in one embodiment of this application.
[0020] Figure 2 This is a side view of a current collector provided in one embodiment of this application.
[0021] Figure 3 This is a front view schematic diagram of a current collector provided in one embodiment of this application.
[0022] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of the current collector provided in the embodiment.
[0023] Figure 5 This is one of the dimensional schematic diagrams of a current collector provided in one embodiment of this application.
[0024] Figure 6 yes Figure 4 An enlarged structural diagram of the collector at point F provided in the embodiment.
[0025] Figure 7 This is a schematic diagram of the angle of a current collector provided in one embodiment of this application.
[0026] Figure 8 This is a second schematic diagram of the dimensions of a current collector provided in one embodiment of this application.
[0027] Figure 9 This is a schematic diagram of the structure of a wind turbine device provided in one embodiment of this application.
[0028] Figure 10 This is a schematic diagram of the low-voltage region of a current collector provided in one embodiment of this application.
[0029] Figure label: 1. Impeller; 2. Collector; 20. Collector channel; 3. Main body of the collector; 31. Contraction section; 32. Expansion section; 4. Flange section; 5. Low-pressure area. Detailed Implementation
[0030] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.
[0031] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, wherein a fixed connection can include an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0033] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0035] The following is combined Figures 1 to 8 This application describes the collector, wind turbine assembly, and wind turbine equipment.
[0036] A wind turbine assembly with a collector mainly consists of two parts: an impeller and a collector. Figure 1 As shown. During operation, the airflow enters from the front of the impeller. In this application, the surface perpendicular to the impeller's rotation axis is defined as the plane of rotation, and the surface perpendicular to the plane of rotation is defined as the flow plane (not elaborated further below). A planar sectional view is taken along the flow plane, and the axial and radial directions are defined as follows. Figure 2 As shown.
[0037] The purpose of using a collector is to allow more airflow to pass through it, increasing its velocity as it passes through the impeller cross-section. This allows more wind energy to be converted into electrical energy, increasing the impeller's power generation capacity. The collector works by having the airflow pass through the contraction section 11 and expansion section 12, which can be understood as the suction surface of an airfoil, and the flange section 13, which can be understood as a flap. During operation, the airflow accelerates as it passes through the contraction section 11, creating a low-pressure area behind the flange section 13, allowing more airflow to enter the collector. The low-pressure area formed behind the collector can be seen in [reference needed]. Figure 10 , Figure 10 This is a schematic diagram of the low-voltage zone of the collector.
[0038] To achieve high power generation in existing wind turbine components with collectors, assuming the rotor design is already well optimized, there are two main approaches: First, making the entire turbine larger. This introduces problems related to cost, reliability, safety, installability, and noise, and is generally not the preferred direction for product development. Second, optimizing collector performance. However, under maximum space constraints, collectors are prone to premature flow separation, leading to a decline in performance rather than continued improvement.
[0039] According to the current collector proposed in the first aspect of this application, please refer to... Figures 1 to 6The collector includes a collector body 3 and a flange section 4. The collector body 3 includes a contraction section 31 and an expansion section 32. The expansion section 32 is connected to the contraction section 31. The contraction section 31 and the expansion section 32 form a collection channel 20. An air inlet is provided at the first end of the contraction section 31. The second end of the contraction section 31 is connected to the first end of the expansion section 32. The diameter of the collector body 3 gradually decreases along the direction from the first end of the contraction section 31 to the second end of the contraction section 31, and the diameter of the collector body 3 gradually increases along the direction from the first end of the expansion section 32 to the second end of the expansion section 32. The flange section 4 is connected to the side of the collector body 3 away from the collection channel 20, and the flange section 4 is located between the first end and the second end of the expansion section 32.
[0040] According to the current collector of this application embodiment, a low-pressure zone 5 is formed on the side away from the current collection channel 20 through the flange section 4 and the expansion section 32, so that the airflow inside the current collector will not separate prematurely, thereby achieving the effect of increasing power generation.
[0041] By comparing with collectors of related technologies, and without changing the external dimensions, the collector of this application can increase the power generation of wind turbines by more than 3% by forming a low-pressure zone 5 between the flange section 4 and the expansion section 32.
[0042] Understandably, the collector consists of a collector body 3 and a flange section 4. The collector body 3 includes a contraction section 31 and an expansion section 32. The contraction section 31 serves as the inlet of the collector, with an air inlet at its first end to receive airflow from the outside. The expansion section 32 connects to the second end of the contraction section 31, forming the rear half of the collector channel 20. The design of the expansion section 32 allows the airflow to gradually decelerate and diffuse after accelerating through the contraction section 31, providing stable airflow conditions for the subsequent power generation process. Please refer to... Figure 6 The first end of the expansion section 32 is located at point O, the second end of the contraction section 31 is located at point A, and the second end of the expansion section 32 is located at point C. Point O is located at the position where the collector diameter is the smallest.
[0043] The collector in this embodiment is a one-piece structure, specifically divided into a contraction section 31 and an expansion section 32. The contraction section 31 is used to form a constriction structure, and the expansion section 32 is used to form an expansion structure.
[0044] Of course, the contraction section 31 and the expansion section 32 can also be independent components, and the contraction section 31 and the expansion section 32 can be fixedly connected by welding or other connection methods.
[0045] Flange section 4 is connected to the side of the collector body 3 away from the collector channel 20 and is located between the first end and the second end of the expansion section 32, so that a specific low-pressure zone 5 is formed between flange section 4 and expansion section 32. By forming a low-pressure zone 5 between flange section 4 and expansion section 32, the separation phenomenon of airflow inside the collector can be delayed, that is, the airflow will not separate from the collector wall prematurely, thereby reducing flow resistance and improving airflow utilization efficiency.
[0046] In one embodiment, the wind power generated by the wind turbine assembly using the collector of this application is as follows: The wind speed ahead is 6.22 m / s, the wind energy ahead (based on the rotor diameter) is 14.452 W, the blade rotation speed is 1560 rpm, the blade torque is 0.0955, the power generation is 15.54 W, and the wind energy utilization rate is 108%.
[0047] As can be seen, the collector in this embodiment forms a low-pressure zone 5 between the flange section 4 and the expansion section 32, so that the airflow inside the collector will not separate prematurely, thereby achieving the effect of increasing power generation.
[0048] According to one embodiment of this application, please refer to Figure 8 The axial dimension of the collector body 3 is width B, and the axial dimension of the flange section 4 between the connection of the expansion section 32 and the second end of the expansion section 32 is width B1, where 0.05B <B1<0.25B。
[0049] It is understood that the axial dimension of the collector body 3, that is, the axial dimension of the collector channel 20, is the width B. In this embodiment, the value of the width B1 is between 0.05B and 0.25B, which can ensure the best airflow separation and delay effect in the low-pressure zone 5.
[0050] In one embodiment, B1 = 0.05B. With other parameters remaining unchanged, the wind power generated by the wind turbine assembly of the collector is as follows: The wind speed ahead is 6.30 m / s, the wind energy ahead (based on the rotor diameter) is 15.017 W, the blade rotation speed is 1560 rpm, the blade torque is 0.1012 Nm, the power generation is 16.47 W, and the wind energy utilization rate is 110%.
[0051] In one embodiment, B1 = 0.25B, and with other parameters remaining constant, the wind power generated by the wind turbine assembly of the collector is as follows: The wind speed ahead is 6.19 m / s, the wind energy ahead (based on the rotor diameter) is 14.244 W, the blade rotation speed is 1560 rpm, the blade torque is 0.0933 Nm, the power generation is 15.19 W, and the wind energy utilization rate is 107%.
[0052] According to one embodiment of this application, please refer to Figure 2 , Figure 6 and Figure 7 The line connecting the first end and the second end of expansion section 32 is line segment OC, and the angle between line segment OC and the axis of the collector is the outlet expansion angle β', where 2° < β' < 5°.
[0053] It is understood that the line connecting the first end of the expansion section 32 (i.e., the end connected to the contraction section 31) and the second end of the expansion section 32 is defined as line segment OC. The angle between line segment OC and the axis of the collector is the outlet expansion angle β'. An appropriate outlet expansion angle can ensure that the airflow can diffuse smoothly when leaving the expansion section 32, reducing airflow separation and energy loss. According to the embodiments of this application, the value of the outlet expansion angle β' is between 2° and 5°, which optimizes the performance of the collector, not only improving the diffusion efficiency of the airflow, but also ensuring that the collector has excellent performance while maintaining a compact structure.
[0054] In one embodiment, β'=2°, and with other parameters remaining constant, the wind power generated by the wind turbine components of the collector is as follows: The wind speed ahead is 6.27 m / s, the wind energy ahead (based on the rotor diameter) is 14.803 W, the blade rotation speed is 1560 rpm, the blade torque is 0.1009 Nm, the power generation is 16.42 W, and the wind energy utilization rate is 111%.
[0055] In one embodiment, β'=15°, and with other parameters remaining constant, the wind power generated by the wind turbine assembly of the collector is as follows: The wind speed ahead is 6.09 m / s, the wind energy ahead (based on the rotor diameter) is 13.564 W, the blade rotation speed is 1560 rpm, the blade torque is 0.0935 Nm, the power generation is 15.22 W, and the wind energy utilization rate is 112%.
[0056] According to one embodiment of this application, the diameter of the first end of the expansion section 32 is D1, the diameter of the second end of the expansion section 32 is D2, the diameter D2 is greater than the diameter D1, and the difference between the diameter D2 and the diameter D1 is positively correlated with the size of the outlet expansion angle β'.
[0057] Understandably, the diameter of the first end of the expansion section 32 is D1, and the diameter of the second end is D2. The difference between diameter D2 and diameter D1 represents the radial expansion degree of the expansion section 32. This difference is positively correlated with the magnitude of the outlet expansion angle β', that is, as β' increases, the difference between D2 and D1 also increases accordingly. This relationship ensures that the airflow can smoothly diffuse at a predetermined angle and speed when passing through the expansion section 32.
[0058] According to one embodiment of this application, the line connecting the second end of the contraction section 31 and the first end of the contraction section 31 is line segment OA, and the angle between line segment OA and the axis of the collector is the inlet contraction angle α', wherein 2°<α'<5°.
[0059] According to an embodiment of this application, the line connecting the second end and the first end of the contraction section 31 is line segment OA, and the angle between line segment OA and the axis of the collector is the inlet contraction angle α'. By setting the inlet contraction angle α' between 2° and 5°, it can be ensured that the airflow is moderately contracted at the inlet, which reduces the increase of local resistance and improves the stability of the airflow.
[0060] According to one embodiment of this application, the diameter of the first end of the contraction section 31 is D0, and the diameter of the second end of the contraction section 31 is D1. The diameter D0 is greater than the diameter D1, and the difference between the diameter D0 and the diameter D1 is positively correlated with the size of the inlet contraction angle α'.
[0061] It is understood that the first end of the contraction section 31 is the inlet of the collector, with a diameter of D0; the second end is connected to the expansion section 32, with a diameter of D1. According to the embodiments of this application, the diameter D0 is larger than the diameter D1, and the difference between the diameters D0 and D1 is positively correlated with the size of the inlet contraction angle α'. This design allows the airflow to be gradually accelerated when entering the collector, while ensuring the stability of the airflow.
[0062] According to one embodiment of this application, the path between the first end of the contraction segment 31 and the second end of the contraction segment 31 is a curve or a straight line.
[0063] Understandably, when the path between the first and second ends of the contraction section 31 is a curved path, the contraction section 31 can more effectively guide the airflow, reduce turbulence and eddies, thereby improving airflow stability and acceleration. When the path between the first and second ends of the contraction section 31 is a straight path, the design of the contraction section 31 is simpler and the manufacturing cost is lower.
[0064] According to one embodiment of this application, the path between the first end of the expansion segment 32 and the second end of the expansion segment 32 is a curve or a straight line.
[0065] Understandably, when the path between the first and second ends of the expansion section 32 is curved, the expansion section 32 can guide the airflow more effectively, reducing turbulence and eddies. When the path between the first and second ends of the expansion section 32 is straight, the design of the expansion section 32 is simpler and the manufacturing cost is lower.
[0066] According to one embodiment of this application, flange section 4 is perpendicular to the axial direction of the collector.
[0067] It is understandable that when the airflow passes through the narrowing section 31 of the collector, the airflow velocity will increase due to the narrowing of the flow channel. At the same time as the airflow accelerates, the airflow velocity in the area behind the collector flange section 4 is much lower than the airflow velocity inside the collector because it is perpendicular to the axial direction of the collector, thus forming a low-pressure area 5.
[0068] The wind turbine assembly according to the second aspect of the present application includes the above-described collector and impeller 1, with the impeller 1 disposed along the axial direction of the collector.
[0069] The collector guides and accelerates the airflow, ensuring it reaches optimal velocity before entering impeller 1, thereby improving wind energy capture efficiency. Impeller 1 is positioned axially within the collector, allowing it to directly receive the accelerated airflow, further enhancing its wind energy capture efficiency. Impeller 1 is responsible for converting the captured wind energy into mechanical or electrical energy.
[0070] It should be noted that the number, shape, and material of the blades of impeller 1 will affect its efficiency in capturing wind energy. No restrictions are imposed on the number, shape, or material of the blades of impeller 1 here.
[0071] When the wind turbine components are operating, the airflow first enters the converging section 31 of the collector, where the airflow velocity increases due to the narrowing of the flow channel. Subsequently, the airflow passes through the expanding section 32. At the same time, the low-pressure zone 5 formed between the flange section 4 and the expanding section 32 prevents the airflow inside the collector from separating prematurely. The accelerated airflow enters the impeller 1, driving the impeller 1 to rotate, thereby converting wind energy into mechanical energy or electrical energy.
[0072] According to one embodiment of this application, the impeller 1 is located axially at the minimum diameter of the collector 3. In other words, at position O, the junction of the contraction section 31 and the expansion section 32, the impeller is positioned to maximize wind energy conversion efficiency. Displacement of the impeller's installation position axially to either side (front or rear) will result in a significant reduction in wind energy conversion efficiency.
[0073] Please refer to the wind turbine equipment proposed according to the third aspect of the embodiments of this application. Figure 9 This includes the aforementioned collectors.
[0074] It should be noted that the wind turbine equipment of this application, since it includes the above-mentioned collector, has all the technical effects of the above-mentioned collector, which will not be repeated here.
[0075] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.
Claims
1. A current collector, characterized in that, include: The collector body (3) includes a contraction section (31) and an expansion section (32). The expansion section (32) is connected to the contraction section (31). The contraction section (31) and the expansion section (32) form a collection channel (20). An air inlet is provided at the first end of the contraction section (31). The second end of the contraction section (31) is connected to the first end of the expansion section (32). The diameter of the collector body (3) gradually decreases along the direction from the first end of the contraction section (31) to the second end of the contraction section (31), and the diameter of the collector body (3) gradually increases along the direction from the first end of the expansion section (32) to the second end of the expansion section (32). The flange section (4) is connected to the side of the collector body (3) away from the collector channel (20), and the flange section (4) is located between the first end of the expansion section (32) and the second end of the expansion section (32).
2. The current collector according to claim 1, characterized in that, The axial dimension of the collector body (3) is width B, and the axial dimension of the flange section (4) between the connection of the expansion section (32) and the second end of the expansion section (32) is width B1, where 0.05B <B1<0.25B。 3. The current collector according to claim 1, characterized in that, The line connecting the first end of the expansion section (32) and the second end of the expansion section (32) is line segment OC, and the angle between line segment OC and the axis of the collector is the outlet expansion angle β', where 2°<β'<5°.
4. The current collector according to claim 3, characterized in that, The diameter of the first end of the expansion segment (32) is D1, and the diameter of the second end of the expansion segment (32) is D2, with the diameter D2 being greater than the diameter D1.
5. The current collector according to claim 1, characterized in that, The line connecting the second end of the contraction section (31) and the first end of the contraction section (31) is line segment OA, and the angle between line segment OA and the axis of the collector is the inlet contraction angle α', where 2°<α'<5°.
6. The current collector according to claim 5, characterized in that, The diameter of the first end of the contraction segment (31) is D0, and the diameter of the second end of the contraction segment (31) is D1. The diameter D0 is greater than the diameter D1.
7. The current collector according to claim 1, characterized in that, The path between the first end of the contraction segment (31) and the second end of the contraction segment (31) is a curve or a straight line; And / or, The path between the first end of the expansion segment (32) and the second end of the expansion segment (32) is a curve or a straight line.
8. The current collector according to any one of claims 1 to 7, characterized in that, The flange section (4) is perpendicular to the axial direction of the collector.
9. A wind turbine component, characterized in that, include: The current collector according to any one of claims 1 to 8; Impeller (1), the impeller (1) is located axially on the collector body (3).
10. A wind turbine device, characterized in that, The collector includes any one of claims 1 to 8.