Automatic folding blade type vertical shaft fan

Abstract

The invention discloses an automatic folding blade type vertical axis fan, which belongs to the technical field of assembly equipment, and comprises a blade bracket, a blade cross rod, a stay wire, a rotating motor and blades, through the joint action of a fixed column body, a folding system and blades, when a rotating motor rotates to drive a pull wire to rotate, a blade transverse rod can be driven to rotate with a blade transverse rod rotating hole as the center, and due to the fact that the upper ends and the lower ends of the blades are fixedly connected into the blade transverse rod, the effects of unfolding and folding the blades can be achieved through rotation of the blade transverse rod; meanwhile, when rotating to the downwind side, the folding system is driven by the rotating motor to guide the blades to be unfolded to receive wind power, and when rotating to the headwind side, the folding system is driven by the rotating motor to guide the blades to be folded so as to reduce air resistance. The problems that when one rotating side of an existing resistance type vertical axis fan is powered, the other side of the existing resistance type vertical axis fan is subjected to resistance, most blade folding modes and mechanisms are complex, and the folding and unfolding processes are difficult are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to an automatic folding blade type vertical axis fan. Background Art

[0002] Wind turbines can be generally divided into two categories: 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 have the following three shortcomings: (1) excessive noise; (2) unstable power generation system with large fluctuations; (3) generators and other major components are located at high altitudes, resulting in high installation and maintenance costs. Therefore, industry technicians are also actively exploring new vertical axis wind turbines.

[0003] Compared with horizontal axis wind turbines, vertical axis wind turbines have the advantages of being able to be driven by light wind and being noiseless. Not only is the structural design simple, but it also reduces the gyroscopic force of the wind wheel against the wind. However, due to the very limited windward area of ​​the vertical axis wind turbine blades, the wind-to-motor conversion efficiency is low, and the CP value of the wind turbine performance does not exceed 0.4.

[0004] According to 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 the working mechanism or overall style of wind turbines, they are mainly divided into the following twelve types:

[0005] The first category: variable pitch vertical axis wind turbines, which are equipped with various types of variable pitch mechanisms to adjust the inclination angle of the blades or the windward area of ​​the blades, so as to achieve the purpose of increasing aerodynamic efficiency or resisting strong winds. The published variable pitch vertical axis wind turbines mainly include: H-type vertical axis wind turbine CN202211311521.X, vertical axis wind turbine CN202211275138.3; The second category: blade opening and closing vertical axis wind turbines, with small blades set on the blade frame, closing the small blades on the downwind side to increase wind resistance, and opening the small blades on the windward side to reduce wind resistance, thereby increasing the wind resistance difference on both sides and improving aerodynamic efficiency. The published blade opening and closing type vertical axis wind turbines mainly include: opening and closing type vertical axis fluid wheel power generation device CN202211247798.0, a flat sail type vertical axis wind turbine CN202211132558.6; the third category: combined vertical axis wind turbine, which combines various types of wind turbines together, such as lift type vertical axis wind turbine and resistance type vertical axis wind turbine, horizontal axis wind turbine and vertical axis wind turbine, vibration generator and vertical axis wind turbine, etc. The published combined vertical axis wind turbines mainly include: vertical axis wind power generation equipment CN202211234664.5, a vertical axis wind turbine multi-layer combined wind wheel CN202222516845.9; the fourth category: diversion type vertical axis wind turbine, which sets a diversion device on the outside of the rotating body of the wind turbine, so as to utilize part of the wind energy that could not be used before, and improve the 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: Magnus type vertical axis wind turbine. The rotating cylinder in the fluid will be subjected to a force perpendicular to the rotation axis and the flow direction. This phenomenon is called the Magnus effect. The wind turbine designed using the Magnus effect is a Magnus type vertical axis wind turbine. The published Magnus type vertical axis wind turbines are mainly Magnus type wind wheels and wind turbines CN202211151317.6; Category 6: blade slotted vertical axis wind turbines, which have air slots in the blades and use the acceleration effect of the airflow passing through the air slots to improve the aerodynamic efficiency of the wind turbine. The published blade slotted vertical axis wind turbines mainly include: a vertical axis wind turbine for improving wind energy utilization CN202220539639.7, and a synthetic jet jet vertical axis wind turbine blade CN201910705420.2; Category 7: special-shaped blade vertical axis wind turbines, which improve the aerodynamic efficiency of the vertical axis wind turbine by designing blades of different shapes.The published blade slotted vertical axis wind turbines mainly include: a coaxial counter-rotating vertical axis wind turbine generator set using bionic blades CN202210194747.X, a logarithmic spiral blade vertical axis wind power generation device CN202210071312.6; the eighth category: a wind tube type vertical axis wind turbine, which directs the wind at the bottom upward by setting a vertical wind tube, and uses the upward airflow to drive the impeller to rotate and generate electricity. The published wind tube type vertical axis wind turbine is mainly a wind tube type multi-wind rotor vertical axis wind power generation device CN202111065874.1; the ninth category: a counter-rotating vertical axis wind turbine, which sets two sets of inner and outer fan blades or two sets of upper and lower fan blades, and the two sets of fan blades rotate in opposite directions in different spaces, and the two sets of fan blades are respectively connected to the stator and rotor of the generator, thereby increasing the relative rotation speed of the stator and the rotor. The published paired vertical axis wind turbines mainly include: a vertical axis dual-drive wind power generation device CN202110577345.3, a bidirectional vertical axis frame wind turbine generator set CN202011259409.7; Category 10: Folding vertical axis wind turbine, which folds or unfolds the blades through a folding mechanism to achieve the purpose of breeze starting or strong wind resistance of the wind turbine. It belongs to one of the categories of variable pitch vertical axis wind turbines, but because it mainly achieves breeze starting or strong wind resistance through folding, it is listed as a separate category. The published folding vertical axis wind turbines mainly include: a vertical axis wind turbine blade device CN202110229578.4, a vertical axis wind turbine based on a speed regulation mechanism CN202010793558.5; Category 11: Umbrella-type vertical axis wind turbine, which uses umbrellas instead of blades, opens the umbrella on the downwind side, and closes the umbrella on the windward side, thereby increasing the wind resistance difference on both sides and improving aerodynamic efficiency. It belongs to one of the categories of variable-pitch vertical axis wind turbines, but because of its particularly strange style, it is listed as a separate category. The published umbrella-type vertical axis wind turbines mainly include: vertical axis wind turbine blade device CN202010783320.4 and umbrella-type sail blade wind turbine CN200820090746.6; Category 12: high-altitude floating vertical axis wind turbine, whose working mechanism belongs to the common vertical axis wind turbine, but because it floats in the sky and can utilize the larger wind energy at high altitude, and its style is unique, it is 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, a high-altitude vertical axis wind turbine generator CN201621071587.6.

[0006] The main reason why the existing vertical axis wind turbines are difficult to apply is their low efficiency. However, among the twelve existing vertical axis wind turbines, except for the guide type vertical axis wind turbine, the other types of vertical axis wind turbines are still inefficient. The main reason is that if the rotation space of the fan blades is divided into two sides, with the downwind side and the windward side each occupying half, the wind on the downwind side does positive work on the fan, and the wind on the windward side does negative work on the fan, and the resistance on the windward side cannot be completely zero, so the CP value of the existing eleven types of vertical axis fans is less than 0.5. The guide mechanism has a high application value in small fans, but in large wind turbines, it is not realistic to set up a large guide mechanism separately from the blades. Not only does it increase the cost, but the force and space problems of the large guide mechanism will limit the application of the guide type vertical axis fan. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that one side of the existing resistance-type vertical axis fan is powered while the other side is resisted, and most of the folding blades are complicated and difficult to fold and unfold, which results in low wind energy utilization in the blade rotation area. An automatic folding blade vertical axis fan is proposed. Through the joint action of a fixed column, a folding system and a blade, when the rotating motor rotates to drive the pull wire to rotate, the blade cross bar can be driven to rotate around the blade cross bar rotation hole. Since the upper and lower ends of the blade are fixedly connected to the blade cross bar, the rotation of the blade cross bar can play the role of unfolding and folding the blade; at the same time, the blade drives the blade bracket to rotate along the fixed column. When rotating to the downwind side, the folding system guides the blade to unfold to receive wind force under the drive of the rotating motor. When rotating to the upwind side, the folding system guides the blade to fold under the drive of the rotating motor to reduce air resistance.

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

[0009] Preferably, the folding system 3000 includes a blade bracket 200, a blade cross bar 300, a pull wire 310 and a rotating motor 320; the rotating motor 320 is installed in the motor fixing hole 208 of the blade bracket 200, one end of the pull wire 310 is connected to the rotating groove of the rotating motor 320, and the other end successively bypasses the pull wire turning boss 205 and the end turning boss 206 of the blade bracket 200, and then passes through the blade cross bar pulling hole 303 of the blade cross bar 300, and finally is connected to the rotating groove of the rotating motor 320; the upper and lower ends of the blade bracket 200 are provided with pull wires 310.

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

[0011] Preferably, the blade bracket 200 includes an upper bracket ring 201, a lower bracket ring 202, a bracket connecting rod 203, a bracket cross bar 204, a wire steering boss 205, an end steering boss 206, a blade cross bar connecting hole 207 and a motor fixing hole 208; the upper bracket ring 201 and the lower bracket ring 202 are spaced apart with bracket cross bars 204, the upper bracket ring 201 and the lower bracket ring 202 are connected by a bracket connecting rod 203, a wire steering boss 205 is provided at one end of the bracket cross bar 204 close to the blade bracket 200, and an end steering boss 206 is provided at the other end, a blade cross bar connecting hole 207 is provided at a position of the bracket connecting rod 203 close to the bracket cross bar 204, and a motor fixing hole 208 is provided at the center position of the bracket connecting rod 203.

[0012] Preferably, the main part of the blade cross bar 300 is a blade cross bar rod body 301, and a blade cross bar rotation hole 302 is provided at one end of the blade cross bar rod body 301 close to the bracket connecting rod 203, and a blade cross bar pulling hole 303 is provided at the other end, wherein the blade cross bar rotation hole 302 is arranged opposite to the blade cross bar connecting hole 207.

[0013] Beneficial effects of the present invention:

[0014] 1. This solution works together by fixing the column, folding system and blades. When the rotating motor rotates to drive the pull wire to rotate, it can drive the blade cross bar to rotate with the blade cross bar rotation hole as the center. Since the upper and lower ends of the blade are fixedly connected to the blade cross bar, the rotation of the blade cross bar can play the role of unfolding and folding the blade; at the same time, the blade drives the blade bracket to rotate along the fixed column. When rotating to the downwind side, the folding system drives the rotating motor to guide the blade to unfold to receive wind force. When rotating to the upwind side, the folding system drives the rotating motor to guide the blade to fold to reduce air resistance. This solution has a simple structure and is easier to manufacture and maintain. At the same time, the probability of failure during the folding and unfolding process is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

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

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

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

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

[0020] Figure 5 It is a schematic diagram of an exploded view of the folding system of the present invention;

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

[0022] Figure 7 This is a partial enlarged view of the cable assembly of the present invention. Figure 1 Schematic diagram;

[0023] Figure 8 This is a partial enlarged view of the cable assembly of the present invention. Figure 2 Schematic diagram;

[0024] Fig. 9 It is a schematic diagram of the cooperation between the folding system and the blades of the present invention;

[0025] Fig.10 It is a schematic diagram of the blade extension state of the present invention;

[0026] Fig.11 It is a schematic diagram of a blade in a semi-extended state of the present invention;

[0027] Fig.12 It is a schematic diagram of the closed state of the blades of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 100, fixed column; 200, blade bracket; 201, upper bracket ring; 202, lower bracket ring; 203, bracket connecting rod; 204, bracket cross bar; 205, pull wire steering boss; 206, end steering boss; 207, blade cross bar connecting hole; 208, motor fixing hole; 3000, folding system; 300, blade cross bar; 301, blade cross bar rod body; 302, blade cross bar rotation hole; 303, blade cross bar pulling hole; 310, pull wire; 320, rotating motor; 400, blade. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

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

[0032] The fixed column 100, the blade bracket 200, the folding system 3000 and the blade 400 are composed. The fixed column 100 is the central axis of the entire fan. The blade bracket 200 is installed on the fixed column 100 to provide an installation environment for the blade 400 and the folding system 3000. The folding system 3000 is mainly used to drive the blade 400 to fold and unfold, and the blade 400 is mainly used to receive wind. After installation, when the fan rotates to the downwind side, the folding system 3000 guides the blade 400 to unfold and receive wind, and when it rotates to the upwind side, the folding system 3000 guides the blade 400 to fold to reduce air resistance.

[0033] Figure 2 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 rotation axis of the fan.

[0034] Figure 3 is a schematic diagram of the blade bracket, such as Figure 3As shown, the blade support 200 is mainly composed of an upper support ring 201, a lower support ring 202, a support connecting rod 203 and a support cross bar 204. The upper support ring 201 and the lower support ring 202 are both annular structures, and four support cross bars 204 are evenly connected around them. The upper support ring 201 and the lower support ring 202 are connected together by a support connecting rod 203. A pull wire turning boss 205 is provided at a position close to one end of the blade support 200 on the support cross bar 204, and an end turning boss 206 is provided at the end. A blade cross bar connecting hole 207 is provided on the support connecting rod 203 near the support cross bar 204, and a motor fixing hole 208 is provided at the center.

[0035] Figure 4 is a schematic diagram of the blade crossbar, such as Figure 4 As shown, the blade cross bar 300 is in a rod-like form, and the main part is a blade cross bar body 301 . A blade cross bar rotation hole 302 is provided at one end of the blade cross bar body 301 , and a blade cross bar pulling hole 303 is provided at the other end.

[0036] Figure 5 This is an exploded diagram of the folding system. Figure 6 is the assembly diagram of the folding system. Figure 7 This is a partial enlarged view of the wire assembly Figure 1 Schematic diagram, Figure 8 This is a partial enlarged view of the wire assembly Figure 2 Schematic diagram. Figure 5 and Figure 6 As shown, the folding system 3000 is mainly composed of a blade bracket 200, a blade cross bar 300, a pull wire 310 and a rotating motor 320. The blade cross bar rotating hole 302 on the blade cross bar 300 is aligned with the blade cross bar connecting hole 207 on the blade bracket 200 and connected, the rotating motor 320 is installed in the motor fixing hole 208 on the blade bracket 200, one end of the pull wire 310 is connected to the rotating groove on the rotating motor 320, and then it passes through the pull wire turning boss 205 and the end turning boss 206 on the blade bracket 200 in turn, and then passes through the blade cross bar pulling hole 303 on the blade cross bar 300 and is fixedly connected, and finally the other end of the pull wire 310 is connected to the rotating groove on the rotating motor 320. The upper end and the lower end of the blade bracket 200 each need to be connected in the same way with a pull wire 310. Figure 7 The connection of the pull wire 310 to the rotating motor 320 is shown. Figure 8The drawing wire 310 is connected to the blade cross bar 300. After the folding system 3000 is assembled, the drawing wire 310 can be driven to move by the rotation of the rotating motor 320. Taking the movement of the drawing wire 310 in the upper part of the blade bracket 200 as an example, when the drawing wire 310 moves in the counterclockwise direction, the blade cross bar 300 can be driven to rotate counterclockwise around the blade cross bar rotation hole 302, thereby achieving the effect of unfolding the blade. When the drawing wire 310 moves in the clockwise direction, the blade cross bar 300 can be driven to rotate clockwise around the blade cross bar rotation hole 302, thereby achieving the effect of folding the blade.

[0037] Fig. 9 It is a schematic diagram of the folding system and the blades. Fig.10 This is a schematic diagram of the blade extension state. Fig.11 This is a schematic diagram of the blade in semi-extended state. Fig.12 is a schematic diagram of the closed state of the blade. Fig. 9 As shown, the upper and lower ends of the blade 400 are fixedly connected to the blade cross bar 300 located on the upper and lower sides of the blade bracket 200. When the rotary motor 320 rotates to drive the pull wire 310 to move in the counterclockwise direction, the blade cross bar 300 can be driven to rotate counterclockwise around the blade cross bar rotation hole 302. Since the upper and lower ends of the blade 400 are fixedly connected to the blade cross bar 300, the rotation of the blade cross bar 300 can achieve the effect of unfolding the blade 400. When the pull wire 310 moves in the clockwise direction, the blade cross bar 300 can be driven to rotate clockwise around the blade cross bar rotation hole 302. Since the upper and lower ends of the blade 400 are fixedly connected to the blade cross bar 300, the rotation of the blade cross bar 300 can achieve the effect of folding the blade. Figure 10 to Figure 12 The diagram shows the blade crossbar 300 and the blade 400 being in the unfolded, semi-expanded and closed states when the pull wire 310 drives the blade crossbar 300 and the blade 400 to move.

[0038] After the fan is installed as a whole, under the action of wind, the blades 400 drive the blade bracket 200 to rotate along the fixed column 100. When rotating to the downwind side, the folding system 3000 guides the blades 400 to unfold to receive wind force under the drive of the rotating motor 320, and when rotating to the upwind side, the folding system 3000 guides the blades 400 to fold under the drive of the rotating motor 320 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 present specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the protection scope of the present invention.

Claims

1. An automatic folding blade vertical axis fan, characterized in that: The invention comprises 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 bracket ring (201) and a lower bracket ring (202); the upper and lower ends of the blades (400) are respectively fixedly connected to the blade cross bars (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 to receive wind force; when the fan rotates to the upwind side, the folding system (3000) guides the blades (400) to fold to reduce air resistance.

2. The automatic folding blade vertical axis fan according to claim 1, characterized in that: The folding system (3000) comprises a blade bracket (200), a blade cross bar (300), a pull wire (310) and a rotating motor (320); the rotating motor (320) is installed in the motor fixing hole (208) of the blade bracket (200); one end of the pull wire (310) is connected to the rotating groove of the rotating motor (320), and the other end successively passes around the pull wire turning boss (205) and the end turning boss (206) of the blade bracket (200), then passes through the blade cross bar pulling hole (303) of the blade cross bar (300), and finally is connected to the rotating groove of the rotating motor (320); the upper end and the lower end of the blade bracket (200) are both provided with a pull wire (310).

3. The automatic folding blade vertical axis fan according to claim 2, characterized in that: The pull wire (310) is fixedly connected to the blade crossbar pulling hole (303).

4. The automatic folding blade vertical axis fan according to claim 2, characterized in that: The blade bracket (200) comprises an upper bracket ring (201), a lower bracket ring (202), a bracket connecting rod (203), a bracket cross bar (204), a wire drawing steering boss (205), an end steering boss (206), a blade cross bar connecting hole (207) and a motor fixing hole (208); the upper bracket ring (201) and the lower bracket ring (202) are provided with bracket cross bars (204) at intervals, the upper bracket ring (201) and the lower bracket ring (202) are connected via the bracket connecting rod (203), one end of the bracket cross bar (204) close to the blade bracket (200) is provided with a wire drawing steering boss (205), and the other end is provided with an end steering boss (206), the bracket connecting rod (203) is provided with a blade cross bar connecting hole (207) at a position close to the bracket cross bar (204), and the motor fixing hole (208) is provided at the center of the bracket connecting rod (203).

5. The automatic folding blade vertical axis fan according to claim 3, characterized in that: The main part of the blade cross bar (300) is a blade cross bar rod body (301), one end of the blade cross bar rod body (301) close to the bracket connecting rod (203) is provided with a blade cross bar rotation hole (302), and the other end is provided with a blade cross bar pulling hole (303), wherein the blade cross bar rotation hole (302) and the blade cross bar connecting hole (207) are arranged opposite to each other.

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