A rotor support for a micro wind turbine

Abstract

This utility model discloses an impeller for a micro wind turbine. It includes a horizontal support and a vertical support. The horizontal support comprises multiple identical horizontal bars, and the vertical support is composed of multiple diagonal braces connected together. Each diagonal brace is made by bending a steel bar and is divided into threaded sections, circular sections, and straight sections. There are two groups of diagonal braces. In each group, any threaded section passes through the circular section of an adjacent diagonal brace, and its circular section is passed through by the threaded section of another adjacent diagonal brace. The axes of the threaded sections are parallel to each other and form a cylindrical, zigzag structure around the impeller's rotation axis. Each threaded section passes through two horizontal bars, while the circular sections and fasteners clamp the horizontal bars in the middle for a fixed connection. The impeller support uses common metal profiles and can be used after simple processing or treatment. No additional bolts are required, installation is simple, no special tools are needed, and it is easy for non-professionals to operate. It is convenient to transport and store after disassembly. It is ideal for travel or use as a mobile power supply device.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, specifically relating to a rotor support for a micro wind turbine. Background Technology

[0002] Wind power is the renewable energy source with the greatest potential for large-scale development and commercialization. Furthermore, wind resources are widely distributed and virtually unrestricted by geographical location.

[0003] Mainstream wind power projects are primarily large-scale, centralized projects, meaning they have large capacities and often use large wind turbines (megawatt-level), transmitting power over long distances to the user side via high-voltage transmission lines. Distributed projects also exist, with the advantage of localized power consumption, eliminating the need for additional transmission lines. Due to land use and load size constraints, distributed projects generally use small to medium-sized wind turbines, typically with capacities of hundreds of kilowatts or less.

[0004] Applications of micro wind turbines include commercial or residential use, transportation, and powering low-energy municipal infrastructure. These turbines require simple structures, minimal or no maintenance, and easy installation and disassembly, achievable by non-professionals using common tools. For mobile applications, disassembled components should be easy to move and store, avoiding excessive length, width, or weight. Furthermore, cost-effectiveness is crucial; for example, the price of a mobile micro wind turbine should not exceed that of a conventional power bank.

[0005] Generators are generally difficult to disassemble; therefore, the characteristics of micro wind turbines, such as "simple structure and easy installation and disassembly," are mainly reflected in the rotor. The length of the blades and the diameter of the rotor represent the wind-catching and power generation capacity of the micro wind turbine (the larger the blade length and rotor diameter, the greater the wind power generation capacity). If the blade length and rotor diameter are too small, the purpose of using a micro wind turbine will be greatly reduced; however, excessively large blade lengths and rotor diameters will increase the size of the micro wind turbine, making it difficult to transport or store. Therefore, a micro wind turbine rotor bracket is needed to provide support for longer blades while facilitating disassembly and installation. The disassembled components should be easy to transport and store, and the installed rotor diameter should be sufficient. In addition, due to the small blade length and rotor diameter, micro wind turbines rotate at high speeds, so safety and reliability also need to be guaranteed. Summary of the Invention

[0006] To address at least one of the aforementioned technical problems, a first aspect provides a rotor support for a micro wind turbine, comprising a horizontal support and a vertical support; the horizontal support includes multiple identical horizontal bars; the vertical support is constructed by connecting multiple diagonal braces. Each of the diagonal bracing members is made by bending a steel bar; one end of the steel bar is bent and threaded to form a threaded segment; the other end of the steel bar is bent to form a ring to form a ring segment; the middle part of the steel bar is a straight segment; the axis of the threaded segment is parallel to the axis of the ring segment. The vertical support is divided into two groups of diagonal braces. In each group of diagonal braces, the threaded segment of any diagonal brace passes through the ring in the annular segment of the adjacent diagonal brace, and the ring in its annular segment is passed through by the threaded segment of another adjacent diagonal brace. In each group of diagonal braces, the axes of the threaded segments of any diagonal brace are parallel to each other and parallel to the rotation axis of the wind turbine impeller, and have a cylindrical zigzag structure around the rotation axis of the wind turbine impeller. The threaded sections of two diagonal braces with opposite extension directions in different diagonal brace groups are arranged so that their axes coincide or are parallel to form a vertical support. The threaded section of each of the diagonal braces in the vertical bracket passes through the two horizontal rods in the horizontal bracket, while the ring in the annular section of each diagonal brace and the fastener clamp the horizontal rod in the middle, thereby achieving a fixed connection between the vertical bracket and the horizontal bracket.

[0007] In a further technical solution, a portion of each of the horizontal bars is used to connect with the diagonal brace in the vertical support, located at the end of the vertical support, and the remaining portion of the horizontal bar extends to the periphery of the vertical support.

[0008] The angle between the straight segment and the threaded segment is an obtuse angle.

[0009] A nut is provided at the end of the threaded section of the diagonal brace, and an annular section of the adjacent diagonal brace is provided between the nut and the horizontal bar.

[0010] The second aspect provides an impeller for a micro wind turbine, including the impeller support for a micro wind turbine as described above; it also includes blades connected to the impeller support.

[0011] In a further technical solution, there are at least three blades, which are evenly distributed around the rotation axis of the impeller of the micro wind turbine.

[0012] The horizontal support of the impeller is divided into two groups, and the horizontal rods of the two groups of horizontal supports are located at both ends of the vertical support of the impeller; the horizontal rods of the horizontal supports extend to the end of the outer periphery of the vertical support and connect to the blades.

[0013] In a further technical solution, each group of the horizontal supports includes at least six horizontal rods, and the number of horizontal rods is the same in both groups of the horizontal supports.

[0014] Each blade is simultaneously connected to two sets of horizontal supports, and the direction in which the blade extends is parallel to the rotation axis of the impeller of the micro wind turbine.

[0015] Thirdly, a micro wind turbine generator set, characterized in that it includes the impeller, generator and tower of the micro wind turbine generator set described above.

[0016] The beneficial effects of this utility model are as follows: The impeller support adopts a frame structure, formed by interconnecting rods. The rods are all common metal profiles, which can be used after simple processing or treatment. The rods themselves have threads, eliminating the need for additional bolts. The installation process is simple, requiring no special tools, and is easy for non-professionals to operate. The disassembled parts are small in size, making them easy to transport and store. The micro wind turbine unit based on the impeller support in this design is ideal for travel or use as a mobile power supply device, and can also be permanently fixed on a foundation to power small electrical equipment. Attached Figure Description

[0017] Figure 1 This is an axonometric view of an impeller support for a miniature wind turbine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the impeller support diagonal brace of a micro wind turbine according to an embodiment of the present invention; Figure 3 This is an axonometric view of the impeller support diagonal brace of a micro wind turbine according to an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the arrangement of two diagonal brace groups on the impeller support of a micro wind turbine according to an embodiment of the present invention; Figure 5 A schematic diagram of the vertical support structure formed by two diagonal bracing groups of a micro wind turbine rotor bracket according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of a vertical support for the impeller of a micro wind turbine according to an embodiment of the present invention; Figure 7 This is an axonometric view of a vertical support for the impeller bracket of a micro wind turbine according to an embodiment of the present invention; Figure 8 This is a front view of the impeller support of a miniature wind turbine according to an embodiment of the present invention; Figure 9 This is a partial schematic diagram of the connection between the horizontal and vertical supports of the impeller bracket of a micro wind turbine according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the impeller of a miniature wind turbine according to an embodiment of the present invention; Figure 11 This is a top view schematic diagram of the horizontal support of the impeller of a micro wind turbine according to an embodiment of the present invention.

[0018] Explanation of icon numbers: 1. Horizontal support; 1.1. Horizontal bar; 2. Vertical support; 2.1. Diagonal brace; 2.101. Threaded section; 2.102. Circular section; 2.103. Straight section; 2.1011. Axis of threaded section; 2.1031. Axis of circular section; 2.11. Diagonal brace assembly; 3. Rotation axis; 4. Fastener; 5. Nut; 6. Blade.

[0019] It is worth noting that the above figures are for illustrating the features of this utility model and are not intended to show any actual structure or reflect the dimensions, proportions, or other details of various components. To more clearly illustrate the principle of this utility model and to avoid unnecessary details obscuring its principles, the examples in the figures have been simplified. These illustrations will not cause inconvenience to those skilled in the art in understanding this patent, while actual embodiments may include more modules or components. Detailed Implementation

[0020] To make the objectives and technical solutions of the present utility model clearer, the embodiments of the present utility model will be fully described below with reference to the accompanying drawings. This patent describes only a portion of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] An embodiment of the impeller support for a micro wind turbine The impeller support includes a horizontal support (1) and a vertical support (2). As the name suggests, the horizontal support (1) is horizontally set in the overall structure of the impeller support, and the vertical support (2) is vertically set. The reference here is the foundation installation plane (e.g., the ground). The horizontal support (1) includes multiple horizontal bars (1.1) of the same specification. The horizontal bars (1.1) can be made of common profiles or pipes, such as square steel or round pipes.

[0022] As shown in the figure, the vertical support (2) is composed of multiple diagonal braces (2.1) connected together. Each diagonal brace (2.1) is made by bending a steel bar. One end of the steel bar is bent and threaded to form a threaded segment (2.101). The other end of the steel bar is bent to form a ring, forming a ring segment (2.102). The middle part of the steel bar is a straight segment (2.103). The axis (2.1011) of the threaded segment and the axis (2.1031) of the ring segment are parallel. Although the diagonal brace (2.1) is a whole, it can be considered that the two ends of the straight segment (2.103) are connected to the threaded segment (2.101) and the ring segment (2.102) respectively, and the angle between the straight segment (2.103) and the threaded segment (2.101) must be an obtuse angle. Since it is a rotor support for a micro wind turbine, the load-bearing requirement is small, the outer diameter of the steel bar is also small, and bending or tapping operations are relatively convenient.

[0023] The multiple diagonal struts (2.1) in the vertical support (2) are divided into two diagonal strut groups (2.11). The diagonal struts (2.1) in each diagonal strut group (2.11) are connected as follows: the threaded segment (2.101) of any diagonal strut (2.1) passes through the ring in the annular segment (2.102) of the adjacent diagonal strut (2.1), and the ring in its annular segment (2.102) is passed through by the threaded segment (2.101) of another adjacent diagonal strut (2.1). If the threaded segment (2.101) and the annular segment (2.102) in the diagonal strut (2.1) are considered as the beginning and end, then the adjacent diagonal struts (2.1) can be considered as a "beginning and end connected" connection. As shown in the figure, in each diagonal brace group (2.11), the axis (2.1011) of the threaded section of the diagonal brace (2.1) is parallel to each other, and these axes are also parallel to the rotation axis (3) of the wind turbine impeller, and have a cylindrical broken line structure around the rotation axis (3) of the wind turbine impeller.

[0024] The two diagonal bracing groups (2.11) are configured as follows: As shown in the figure, the threaded segments (2.101) of the two diagonal bracing rods (2.1) located in different diagonal bracing groups (2.11) with opposite extension directions are configured to have their axes coincident or parallel, forming a vertical support (2). In this embodiment, as can also be seen from the figure, in the two diagonal bracing groups (2.11), the straight segments (2.103) of the diagonal bracing rods (2.1) intersect at the middle of the straight segments (2.103).

[0025] Regarding the connection between the vertical support (2) and the horizontal support (1), the threaded segment (2.101) of each diagonal brace (2.1) in the vertical support (2) passes through the two horizontal bars (1.1) in the horizontal support (1). It can be seen that the horizontal bars (1.1) are stacked in two layers, and the threaded segment (2.101) of each diagonal brace (2.1) must pass through both layers of horizontal bars (1.1) simultaneously before being connected and fixed. The ring in the annular segment (2.102) of each diagonal brace (2.1) and the fastener (4) clamp the horizontal bar (1.1) in the middle, realizing the fixed connection between the vertical support (2) and the horizontal support (1). As shown in the figure, in this embodiment, the annular segment (2.102) abuts against the contact surface with the horizontal bar (1.1), and then the horizontal bar (1.1) is clamped by the fastener (4). Since the straight section (2.103) and the threaded section (2.101) of the diagonal brace (2.1) form an obtuse angle relationship through bending, the part between the straight section (2.103) and the threaded section (2.101) and the annular section (2.102) of the adjacent diagonal brace (2.1) together play a positioning role.

[0026] As shown in the figure, a portion of each horizontal bar (1.1) is used to connect with the diagonal brace (2.1) in the vertical support (2), located at the upper and lower ends of the vertical support (2), and the remaining portion of the horizontal bar (1.1) extends outward to the periphery of the vertical support (2) to connect the blade (6).

[0027] A nut (5) is also provided at the end of the threaded section (2.101) of the diagonal brace (2.1), which can be pre-tightened to the end of the threaded section (2.101) before the installation of other fasteners (4). In terms of positional relationship, the annular section (2.102) of the adjacent diagonal brace (2.1) is sandwiched between this nut (5) and the horizontal bar (1.1). This nut (5) serves a positioning and adjustment function.

[0028] The novelty and advantages of the above technical solution are: a) The entire support structure is simple, using common profiles, and can be completed with simple processing, with low requirements for processing precision.

[0029] b) The vertical support (2) contains multiple diagonal braces (2.1) of the same specification. The diagonal braces (2.1) are made of economical steel bars by bending and tapping. The diagonal braces (2.1) themselves play the role of support, connection and positioning (or limiting), making assembly and disassembly very convenient.

[0030] c) The disassembled support becomes a single small and lightweight rod, which is very easy to move and store. This type of support is particularly suitable for mobile wind turbines or other low-cost, high-volume applications.

[0031] An embodiment of the impeller of a micro wind turbine like Figure 6 As shown, the impeller of the micro wind turbine includes the impeller support described in the previous chapter. In addition, the impeller also includes blades (6), which are connected to the impeller support.

[0032] There are at least three blades (6), which are evenly distributed around the rotation axis (3) of the micro wind turbine impeller. In this embodiment, there are three blades (6) (in some other embodiments, the number of blades (6) can be increased as needed), and the distribution of the impeller support divides the circumference into three equal parts according to the number of blades (6).

[0033] The impeller's horizontal support (1) is divided into two groups, with each group located at one end of the impeller's vertical support (2). The horizontal rod (1.1) of the horizontal support (1) extends to the outer periphery of the vertical support (2) and is used to connect the blades (6). The portion of the horizontal rod (1.1) located above or below the end of the vertical support (2) is connected to the vertical support (2), as described in the previous chapter.

[0034] Each set of horizontal supports (1) includes at least six horizontal rods (1.1), and the number of horizontal rods (1.1) is the same in both sets of horizontal supports (1). The arrangement and connection method of the horizontal rods (1.1) in the horizontal supports (1) are similar to the technical solution disclosed by the inventor (CN119825618A). In conjunction with the innovation of this utility model, the connection is simpler, and the installation and disassembly are more convenient.

[0035] Each blade (6) is connected to two sets of horizontal supports (1) at the same time. The direction of the blade (6) is parallel to the rotation axis (3) of the impeller of the micro wind turbine. In other words, the blade (6) is set vertically. In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," and "right" 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 this utility model 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 this utility model.

[0036] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this utility model should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rotor support for a micro wind turbine, characterized in that, Includes horizontal support (1) and vertical support (2); The horizontal support (1) includes a plurality of identical horizontal bars (1.1). The vertical support (2) is composed of multiple diagonal braces (2.1) connected together. Each of the aforementioned diagonal braces (2.1) is made by bending a steel bar; One end of the reinforcing bar is bent and threaded to form a threaded segment (2.101). The other end of the steel bar is bent to form a ring, constituting a ring segment (2.102). The middle part of the steel bar is a straight segment (2.103); The axis (2.1011) of the threaded segment and the axis (2.1031) of the annular segment are parallel; The vertical support (2) is divided into two diagonal bracing groups (2.11). In each diagonal brace group (2.11), the threaded segment (2.101) of any diagonal brace (2.1) passes through the ring in the annular segment (2.102) of the adjacent diagonal brace (2.1), and the ring in its annular segment (2.102) is passed through by the threaded segment (2.101) of another adjacent diagonal brace (2.1); in each diagonal brace group (2.11), the axis (2.1011) of the threaded segment of any diagonal brace (2.1) is parallel to each other and parallel to the rotation axis (3) of the wind turbine impeller, and has a cylindrical zigzag structure around the rotation axis (3) of the wind turbine impeller; The threaded sections (2.101) of two diagonal braces (2.1) located in different diagonal brace groups (2.11) with opposite extension directions are set to have their axes coincide or parallel to form a vertical support (2). The threaded section (2.101) of each of the diagonal braces (2.1) in the vertical bracket (2) passes through the two horizontal rods (1.1) in the horizontal bracket (1), while the ring in the annular section (2.102) of each of the diagonal braces (2.1) and the fastener (4) clamp the horizontal rod (1.1) in the middle, thereby achieving a fixed connection between the vertical bracket (2) and the horizontal bracket (1).

2. The impeller support of a micro wind turbine according to claim 1, characterized in that, A portion of each of the horizontal bars (1.1) is used to connect with the diagonal brace (2.1) in the vertical bracket (2) at the end of the vertical bracket (2), and the remaining portion of the horizontal bar (1.1) extends to the periphery of the vertical bracket (2).

3. The impeller support for a micro wind turbine according to claim 1, characterized in that, The angle between the straight segment (2.103) and the threaded segment (2.101) is an obtuse angle.

4. The impeller support for a micro wind turbine according to claim 1, characterized in that, A nut (5) is provided at the end of the threaded section (2.101) of the diagonal brace (2.1), and the annular section (2.102) of the adjacent diagonal brace (2.1) is provided between the nut (5) and the horizontal bar (1.1).

5. An impeller for a miniature wind turbine, characterized in that, Including the impeller support of a micro wind turbine as described in any one of claims 1-4; It also includes blades (6), which are connected to the impeller support.

6. The impeller of a micro wind turbine according to claim 5, characterized in that, The blades (6) are at least three in number and are evenly distributed around the rotation axis (3) of the impeller of the micro wind turbine.

7. The impeller of a micro wind turbine according to claim 5, characterized in that, The horizontal support (1) of the impeller is divided into two groups, and the horizontal rods (1.1) of the two groups of horizontal supports (1) are located at both ends of the vertical support (2) of the impeller. The horizontal rods (1.1) in the horizontal support (1) extend to the end of the outer part of the vertical support (2) and connect to the blade (6).

8. The impeller of a micro wind turbine according to claim 7, characterized in that, Each set of the horizontal supports (1) includes at least six horizontal bars (1.1) and the number of horizontal bars (1.1) is the same in both sets of the horizontal supports (1).

9. The impeller of a micro wind turbine according to claim 7, characterized in that, Each blade (6) is simultaneously connected to two sets of horizontal supports (1), and the direction in which the blade (6) extends is parallel to the rotation axis (3) of the impeller of the micro wind turbine.

10. A miniature wind turbine generator, characterized in that, Includes the impeller, generator, and tower of a micro wind turbine as described in any one of claims 5-9.

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