An automatic folding blade type vertical axis fan

Abstract

This invention discloses an automatically folding blade vertical axis fan, belonging to the field of assembly equipment technology. It includes a blade support, a blade crossbar, a pull wire, a rotary motor, and blades. Through the combined action of the fixed column, folding system, and blades, when the rotary motor rotates to drive the pull wire, it drives the blade crossbar to rotate around its rotation hole. Since the upper and lower ends of the blade are fixedly connected to the blade crossbar, the rotation of the crossbar effectively unfolds and folds the blades. Simultaneously, when rotating to the downwind side, the folding system, driven by the rotary motor, guides the blades to unfold and receive wind force; when rotating to the upwind side, the folding system, driven by the rotary motor, guides the blades to fold to reduce air resistance. This invention solves the problems of existing drag-type vertical axis fans where one side receives power while the other side experiences resistance, and most folding blade mechanisms are complex and the folding and unfolding processes are difficult.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, specifically an automatic folding blade type vertical axis wind turbine. Background Technology

[0002] Wind turbines can be broadly categorized into two types: 1. Horizontal axis wind turbines, where the rotor's axis of rotation is parallel to the wind direction; 2. Vertical axis wind turbines, where the rotor's axis of rotation is perpendicular to the ground or the direction of the airflow. However, existing horizontal axis wind turbines still suffer from three main drawbacks: (1) excessive noise; (2) unstable power generation system with significant fluctuations; and (3) high-altitude location of major components such as the generator, resulting in high installation and maintenance costs. Therefore, industry professionals are actively exploring new types of vertical axis wind turbines.

[0003] Compared to horizontal-axis wind turbines, vertical-axis wind turbines offer advantages such as being able to operate in light winds and being noiseless. They also feature a simpler structural design and reduce the gyroscopic forces exerted on the rotor by the wind. However, due to the very limited windward area of ​​the blades, vertical-axis wind turbines have low wind power conversion efficiency, with a CP value (cost per unit area) of less than 0.4.

[0004] Based on the working principle of wind turbine blades, vertical axis wind turbines are divided into lift-type wind turbines and drag-type wind turbines. According to differences in their working mechanism or overall design, wind turbines are mainly classified into the following twelve types:

[0005] The first category is pitch-type vertical axis wind turbines, which are equipped with various types of pitch mechanisms to adjust the blade tilt angle or the blade's frontal area, thereby increasing aerodynamic efficiency or resistance to strong winds. The published pitch-type vertical axis wind turbines mainly include: H-type vertical axis wind turbine CN202211311521.X and vertical axis wind turbine CN202211275138.3. The second category is blade-closing type vertical axis wind turbines, which have small blades on the blade frame. These small blades close when the wind is downwind to increase wind resistance, and open when the wind is upwind to reduce wind resistance. This increases the wind resistance difference between the two sides, thereby improving aerodynamic efficiency. The published types of vertical axis wind turbines with open / closed blades mainly include: Open / closed vertical axis hydrodynamic turbine generator (CN202211247798.0), and a type of flat-sail vertical axis wind turbine (CN202211132558.6); The third type is the combined vertical axis wind turbine, which combines various types of wind turbines, such as a lift-type vertical axis wind turbine and a drag-type vertical axis wind turbine, a horizontal axis wind turbine and a vertical axis wind turbine, a vibratory generator and a vertical axis wind turbine, etc. The published types of combined vertical axis wind turbines mainly include: Vertical axis wind power generation equipment (CN202211234664.5), and a multi-layer combined wind turbine rotor for a vertical axis wind turbine (CN202222516845.9); The fourth type is the guide-type vertical axis wind turbine, which has a guide device installed on the outside of the rotating body of the wind turbine to utilize the previously unusable wind energy and improve aerodynamic efficiency. The published guide-type vertical axis wind turbines mainly include: a wind-gathering device for a modular vertical axis wind turbine (CN202211228306.3) and a guide-type vertical axis wind turbine structure (CN202221687238.2); the fifth category is the Magnus-type vertical axis wind turbine. A rotating cylinder in a fluid will be subjected to a force perpendicular to the axis of rotation and the direction of flow. This phenomenon is called the Magnus effect. Wind turbines designed using the Magnus effect are called Magnus-type vertical axis wind turbines. The published Magnus-type vertical axis wind turbines are mainly Magnus-type wind turbines and wind turbines (CN202211151317.6); Category 6: Grooved blade vertical axis wind turbines, which have grooves in the blades to improve the aerodynamic efficiency of the wind turbine by utilizing the acceleration effect of airflow passing through the grooves. The published grooved blade vertical axis wind turbines mainly include: a vertical axis wind turbine for improving wind energy utilization (CN202220539639.7) and a composite jet jet vertical axis wind turbine blade (CN201910705420.2); Category 7: Irregular blade vertical axis wind turbines, which improve the aerodynamic efficiency of vertical axis wind turbines by designing blades of different shapes.The published types of slotted blade vertical axis wind turbines mainly include: a coaxial counter-rotating vertical axis wind turbine generator using biomimetic blades (CN202210194747.X), and a logarithmic spiral blade vertical axis wind turbine generator (CN202210071312.6); Category 8: duct-type vertical axis wind turbines, which use a vertical duct to draw air upwards from the bottom and use the upward airflow to drive the rotor to rotate and generate electricity. A published duct-type vertical axis wind turbine is a duct-type multi-rotor vertical axis wind turbine generator (CN202111065874.1); Category 9: counter-rotating vertical axis wind turbines, which have two sets of turbine blades, either inner and outer, or upper and lower, rotating in opposite directions in different spaces. These two sets of blades are connected to the stator and rotor of the generator, respectively, thereby increasing the relative rotational speed of the stator and rotor. The published specifications for transition vertical axis wind turbines mainly include: a vertical axis dual-drive wind power generation device CN202110577345.3, and a bidirectional vertical axis frame-type wind turbine generator CN202011259409.7; Category 10: folding vertical axis wind turbines, which use a folding mechanism to fold or unfold the blades to achieve the purpose of starting the wind turbine in a light breeze or resisting strong winds. They belong to a category of pitch-type vertical axis wind turbines, but because they mainly achieve starting in a light breeze or resisting strong winds through folding, they are listed as a separate category. The published folding vertical axis wind turbines mainly include: a vertical axis wind turbine blade device CN202110229578.4, and a vertical axis wind turbine based on a speed regulation mechanism CN202010793558.5; Class 11: Umbrella-type vertical axis wind turbine, which uses an umbrella instead of blades, opens on the downwind side and closes on the windward side, thereby increasing the wind resistance difference between the two sides and improving aerodynamic efficiency. It belongs to a type of pitch-type vertical axis wind turbine, but due to its particularly unusual appearance, it is listed as a separate category. The published umbrella-type vertical axis wind turbines mainly include: vertical axis wind turbine blade assembly CN202010783320.4 and umbrella-type sail blade wind turbine CN200820090746.6; Category XII: high-altitude floating vertical axis wind turbines. Their working mechanism is similar to common vertical axis wind turbines, but because they float at high altitudes and can utilize greater wind energy, and have a unique design, they are listed as a separate category. The published high-altitude floating vertical axis wind turbines mainly include: a high-altitude floating vertical axis wind turbine generator set CN201710623545.1 and a high-altitude vertical axis wind turbine CN201621071587.6.

[0006] The main reason existing vertical axis wind turbines are difficult to apply is their low efficiency. Of the twelve existing types of vertical axis wind turbines, except for the guide-flow type, the other types still have low efficiency. The primary reason is that if the rotation space of the turbine blades is divided into two sides, with the downwind side and the upwind side each occupying half, the downwind side does positive work on the turbine, while the upwind side does negative work. Since the resistance on the upwind side cannot be completely zero, the performance CP value of the existing eleven types of vertical axis wind turbines is less than 0.5. While guide-flow mechanisms are highly valuable in small fans, it is impractical to install large guide-flow mechanisms separately outside the blades in large wind turbines. This not only increases cost, but the stress and space requirements of large guide-flow mechanisms also limit the application of guide-flow type vertical axis wind turbines. Summary of the Invention

[0007] The purpose of this invention is to address the problems of existing drag-type vertical axis fans, where one side experiences power while the other side experiences resistance, and most folding blade mechanisms are complex and difficult to fold and unfold, resulting in low wind energy utilization within the blade rotation area. This invention proposes an automatically folding blade vertical axis fan. Through the combined action of a fixed column, a folding system, and blades, when a rotating motor drives a cable to rotate, it causes the blade crossbar to rotate around its rotation hole. Since the upper and lower ends of the blade are fixedly connected to the blade crossbar, the rotation of the crossbar effectively unfolds and folds the blades. Simultaneously, the blades drive the blade support to rotate along the fixed column. When rotating to the downwind side, the folding system, driven by the rotating motor, guides the blades to unfold and receive wind power; when rotating to the upwind side, the folding system, driven by the rotating motor, guides the blades to fold to reduce air resistance.

[0008] To solve the above-mentioned technical problems, the present invention provides an automatic folding blade vertical axis fan, comprising: a fixed column 100, a folding system 3000, and blades 400; the folding system 3000 is fixedly sleeved on the fixed column 100 through an upper support ring 201 and a lower support ring 202, and the upper and lower ends of the blades 400 are respectively fixedly connected to the blade crossbars 300 at the upper and lower ends; when the fan rotates to the downwind side, the folding system 3000 guides the blades 400 to unfold and receive wind force, and when it rotates to the upwind side, the folding system 3000 guides the blades 400 to fold to reduce air resistance.

[0009] Preferably, the folding system 3000 includes a blade support 200, a blade crossbar 300, a pull wire 310, and a rotary motor 320. The rotary motor 320 is installed in the motor fixing hole 208 of the blade support 200. One end of the pull wire 310 is connected to the rotation slot of the rotary motor 320, and the other end passes through the pull wire steering boss 205 and the end steering boss 206 of the blade support 200, then through the blade crossbar pulling hole 303 of the blade crossbar 300, and finally connects to the rotation slot of the rotary motor 320. Pull wires 310 are provided at both the upper and lower ends of the blade support 200.

[0010] Preferably, the pull wire 310 is fixedly connected to the blade crossbar pull hole 303.

[0011] Preferably, the blade support 200 includes an upper support ring 201, a lower support ring 202, a support connecting rod 203, a support crossbar 204, a pull wire steering boss 205, an end steering boss 206, a blade crossbar connecting hole 207, and a motor fixing hole 208. The upper support ring 201 and the lower support ring 202 are provided with support crossbars 204 at intervals. The upper support ring 201 and the lower support ring 202 are connected by the support connecting rod 203. One end of the support crossbar 204 near the blade support 200 is provided with a pull wire steering boss 205, and the other end is provided with an end steering boss 206. The support connecting rod 203 is provided with a blade crossbar connecting hole 207 near the support crossbar 204, and the support connecting rod 203 is provided with a motor fixing hole 208 at its center.

[0012] Preferably, the main body of the blade crossbar 300 is the blade crossbar body 301. One end of the blade crossbar body 301 near the support connecting rod 203 is provided with a blade crossbar rotation hole 302, and the other end is provided with a blade crossbar pulling hole 303. The blade crossbar rotation hole 302 is arranged opposite to the blade crossbar connecting hole 207.

[0013] The beneficial effects of this invention are:

[0014] 1. This design utilizes the combined action of a fixed column, a folding system, and blades. When the rotary motor rotates to drive the cable, it causes the blade crossbar to rotate around its rotation hole. Since the upper and lower ends of the blade are fixedly connected to the blade crossbar, the rotation of the crossbar effectively unfolds and folds the blade. Simultaneously, the blades cause the blade support to rotate along the fixed column. When rotating to the downwind side, the folding system, driven by the rotary motor, guides the blades to unfold and receive wind power. When rotating to the upwind side, the folding system, driven by the rotary motor, guides the blades to fold to reduce air resistance. This design has a simple structure, is easier to manufacture and maintain, and has a relatively lower probability of failure during the folding and unfolding processes. Attached Figure Description

[0015] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0016] Figure 1 This is a schematic diagram of the overall assembly of the present invention;

[0017] Figure 2 This is a schematic diagram of the fixed column of the present invention;

[0018] Figure 3 This is a schematic diagram of the blade support of the present invention;

[0019] Figure 4 This is a schematic diagram of the blade crossbar of the present invention;

[0020] Figure 5 This is an exploded view of the folding system of the present invention;

[0021] Figure 6 This is a schematic diagram of the folding system assembly of the present invention;

[0022] Figure 7 A magnified view of the wire assembly of the present invention. Figure 1 Schematic diagram;

[0023] Figure 8 A magnified view of the wire assembly of the present invention. Figure 2 Schematic diagram;

[0024] Figure 9 This is a schematic diagram of the folding system and blades of the present invention.

[0025] Figure 10 This is a schematic diagram of the blade extension state of the present invention;

[0026] Figure 11 This is a schematic diagram of the blade in a semi-extended state according to the present invention;

[0027] Figure 12 This is a schematic diagram of the blade in the closed state of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 100. Fixed column; 200. Blade support; 201. Upper support ring; 202. Lower support ring; 203. Support connecting rod; 204. Support crossbar; 205. Cable guide boss; 206. End guide boss; 207. Blade crossbar connecting hole; 208. Motor fixing hole; 3000. Folding system; 300. Blade crossbar; 301. Blade crossbar body; 302. Blade crossbar rotation hole; 303. Blade crossbar pull hole; 310. Cable; 320. Rotary motor; 400. Blade. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this invention and are only used to explain this invention. They do not limit the scope of protection of this invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] Example 1: Figure 1 As shown, an automatic folding blade type vertical axis fan includes:

[0032] The fan consists of a fixed column 100, a blade support 200, a folding system 3000, and blades 400. The fixed column 100 serves as the central axis of the entire fan. The blade support 200 is mounted on the fixed column 100, providing an installation environment for the blades 400 and the folding system 3000. The folding system 3000 is mainly used to drive the blades 400 to fold and unfold. The blades 400 are mainly used to receive wind power. After installation, when the fan rotates to the downwind side, the folding system 3000 guides the blades 400 to unfold and receive wind power. When rotating to the upwind side, the folding system 3000 guides the blades 400 to fold to reduce air resistance.

[0033] Figure 2 This is a schematic diagram of a fixed column, such as... Figure 2 As shown, the fixed column 100 is in the form of a cylinder and is used as the central rotating shaft of the fan.

[0034] Figure 3 This is a schematic diagram of the blade support, as shown below. Figure 3As shown, the blade support 200 mainly consists of an upper support ring 201, a lower support ring 202, a support connecting rod 203, and a support crossbar 204. Both the upper support ring 201 and the lower support ring 202 are circular ring structures, with four support crossbars 204 evenly connected around their circumference. The upper support ring 201 and the lower support ring 202 are connected together by the support connecting rod 203. A cable steering boss 205 is provided on one end of the support crossbar 204 near the blade support 200, and an end steering boss 206 is provided at the end. A blade crossbar connecting hole 207 is provided on the support connecting rod 203 near the support crossbar 204, and a motor fixing hole 208 is provided at the center.

[0035] Figure 4 This is a schematic diagram of the blade crossbar, as shown below. Figure 4 As shown, the blade crossbar 300 is a rod-shaped part, the main part of which is the blade crossbar body 301. One end of the blade crossbar body 301 is provided with a blade crossbar rotation hole 302, and the other end is provided with a blade crossbar pulling hole 303.

[0036] Figure 5 This is an exploded view of the folding system. Figure 6 This is an assembly diagram of the folding system. Figure 7 This is a magnified view of the wire assembly. Figure 1 Schematic diagram Figure 8 This is a magnified view of the wire assembly. Figure 2 Schematic diagram. (See diagram) Figure 5 and Figure 6 As shown, the folding system 3000 mainly consists of a blade support 200, a blade crossbar 300, a pull wire 310, and a rotary motor 320. The blade crossbar rotation hole 302 on the blade crossbar 300 is aligned and connected with the blade crossbar connection hole 207 on the blade support 200. The rotary motor 320 is installed in the motor fixing hole 208 on the blade support 200. One end of the pull wire 310 is connected to the rotation groove on the rotary motor 320, then passes sequentially around the pull wire steering boss 205 and the end steering boss 206 on the blade support 200, and then passes through the blade crossbar pulling hole 303 on the blade crossbar 300 and is fixedly connected. Finally, the other end of the pull wire 310 is connected to the rotation groove on the rotary motor 320. The upper and lower ends of the blade support 200 each require a pull wire 310 connected in the same manner. Figure 7 This demonstrates the connection of the pull wire 310 to the rotary motor 320. Figure 8The diagram illustrates the connection of the pull wire 310 to the blade crossbar 300. After the folding system 3000 is assembled, the rotation of the rotary motor 320 drives the pull wire 310. Taking the movement of the pull wire 310 in the upper part of the blade support 200 as an example, when the pull wire 310 moves counterclockwise, it drives the blade crossbar 300 to rotate counterclockwise around the blade crossbar rotation hole 302, thus unfolding the blade. When the pull wire 310 moves clockwise, it drives the blade crossbar 300 to rotate clockwise around the blade crossbar rotation hole 302, thus folding the blade.

[0037] Figure 9 This is a schematic diagram showing the folding system and the blades working together. Figure 10 This is a schematic diagram of the leaf extension state. Figure 11 This is a schematic diagram of the leaf in a semi-extended state. Figure 12 This is a schematic diagram of the blades in the closed state. (Example) Figure 9 As shown, the upper and lower ends of the blade 400 are fixedly connected to the blade crossbars 300 located on the upper and lower sides of the blade support 200, respectively. When the rotary motor 320 rotates to drive the pull wire 310 to move counterclockwise, it can drive the blade crossbar 300 to rotate counterclockwise around the blade crossbar rotation hole 302. Since the upper and lower ends of the blade 400 are fixedly connected to the blade crossbar 300, the rotation of the blade crossbar 300 can unfold the blade 400. When the pull wire 310 moves clockwise, it can drive the blade crossbar 300 to rotate clockwise around the blade crossbar rotation hole 302. Since the upper and lower ends of the blade 400 are fixedly connected to the blade crossbar 300, the rotation of the blade crossbar 300 can fold the blade. Figures 10-12 The diagram shows the unfolded, semi-unfolded, and closed states when the pull wire 310 drives the blade crossbar 300 and the blade 400 to move.

[0038] After the entire fan is installed, under the action of wind, the blades 400 drive the blade support 200 to rotate along the fixed column 100. When rotating to the downwind side, the folding system 3000, driven by the rotary motor 320, guides the blades 400 to unfold and receive wind power. When rotating to the upwind side, the folding system 3000, driven by the rotary motor 320, guides the blades 400 to fold to reduce air resistance.

[0039] The above specific embodiments are preferred embodiments of the present invention and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic folding blade type vertical axis fan, characterized in that: The system includes a fixed column (100), a folding system (3000), and blades (400). The folding system (3000) is fixedly sleeved on the fixed column (100) via an upper support ring (201) and a lower support ring (202). The upper and lower ends of the blades (400) are fixedly connected to the blade crossbars (300) at the upper and lower ends, respectively. When the fan rotates to the downwind side, the folding system (3000) guides the blades (400) to unfold and receive wind power. When it rotates to the upwind side, the folding system (3000) guides the blades (400) to fold to reduce air resistance. Force; The folding system (3000) includes a blade support (200), a blade crossbar (300), a pull wire (310), and a rotary motor (320); the rotary motor (320) is installed in the motor fixing hole (208) of the blade support (200), one end of the pull wire (310) is connected to the rotating groove of the rotary motor (320), and the other end passes through the pull wire steering boss (205) and the end steering boss (206) of the blade support (200) in sequence, and then passes through the blade crossbar pulling hole (303) of the blade crossbar (300). Finally, it is connected to the rotating slot of the rotary motor (320); both the upper and lower ends of the blade support (200) are provided with pull wires (310); the pull wires (310) are fixedly connected to the blade crossbar pull hole (303); the blade support (200) includes an upper support ring (201), a lower support ring (202), a support connecting rod (203), a support crossbar (204), a pull wire steering boss (205), an end steering boss (206), a blade crossbar connecting hole (207), and a motor fixing hole (208); the upper support ring (201) The upper support ring (201) and the lower support ring (202) are provided with support crossbars (204) at intervals. The upper support ring (201) and the lower support ring (202) are connected by support connecting rods (203). One end of the support crossbar (204) near the blade support (200) is provided with a pull wire steering boss (205), and the other end is provided with an end steering boss (206). The support connecting rod (203) near the support crossbar (204) is provided with a blade crossbar connecting hole (207), and the center of the support connecting rod (203) is provided with a motor fixing hole (208).

2. The automatic folding blade vertical axis fan according to claim 1, characterized in that: The main body of the blade crossbar (300) is the blade crossbar body (301). The blade crossbar body (301) has a blade crossbar rotation hole (302) at one end near the support connecting rod (203) and a blade crossbar pulling hole (303) at the other end. The blade crossbar rotation hole (302) is opposite to the blade crossbar connecting hole (207).

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