Blade automatic telescopic type vertical shaft fan

Abstract

The invention discloses a vertical axis fan with automatic telescopic blades, which belongs to the technical field of wind power generation and comprises a blade fine adjustment system and the like. Under the action of wind power, the pushing system pushes the fan to rotate, in the rotating process, the blade telescopic system guides the blades to unfold on the downwind side to receive the wind power and fold on the upwind side at the same time, and resistance on the upwind side is reduced; therefore, the push rod is pushed to move in the push rod guide groove. Under the guide of the push rod guide rod, the blade support can rotate around the first rotating shaft and the blade support rotating shaft, extension of the blades and fine adjustment of the direction of the blade support are achieved under the condition that no extra motor is used for driving, and therefore it is guaranteed that the plane where the blades are located is perpendicular to the wind direction in the rotating process, and the blades can receive wind energy to the maximum extent; and the wind energy utilization efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a vertical axis fan with automatically retractable blades. 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.

[0007] Of course, the application of the space on both sides can also be achieved by switching the blades and blade brackets through a motor, but the energy required to switch the blades and blade brackets at the same time is relatively large. The present invention provides a rotary rod switching method to achieve the counter-rotation of the blades in the space on both sides, which consumes relatively less energy. Summary of the invention

[0008] The purpose of the present invention is to solve the problem of low efficiency caused by large energy consumption in the existing motor switching blade and blade bracket mode, and propose a blade automatic telescopic vertical axis fan, which provides a mounting fulcrum and a rotating center axis for the entire fan through a fixing system, and the driving system is installed on the fixing system. Under the action of wind force, the driving system drives the fan to rotate, and during the rotation process, the blade telescopic system guides the blade to expand on the downwind side to receive wind force, and to close on the upwind side, thereby reducing the resistance on the upwind side. In addition, when the upper rotating bracket and the lower rotating bracket rotate, the push rod guide ball moves in the fine-tuning drive guide groove, thereby pushing the push rod to move in the push rod guide groove. Under the guidance of the push rod guide rod, the blade bracket will rotate around the first rotation axis and the blade bracket rotation axis, realizing the extension of the blade and the fine-tuning of the direction of the blade bracket without using an additional motor drive, thereby ensuring that the plane where the blade is located during the rotation process is perpendicular to the wind direction, so that the blade can receive wind energy to the greatest extent, and improve the wind energy utilization efficiency.

[0009] In order to solve the above technical problems, the present invention provides a vertical axis fan with automatically retractable blades, comprising: a fixing system, a driving system, a blade retractable system and a blade fine-tuning system; the driving system is installed on the fixing system; under the action of wind force, the driving system drives the fan to rotate, and during the rotation process, the blade retractable system guides the blades to expand on the downwind side to receive wind force, and to retract on the upwind side; in addition, the blade fine-tuning system guides the blades to fine-tune their directions during the rotation process, thereby ensuring that the plane where the blades are located during the rotation process is perpendicular to the wind direction.

[0010] Preferably, the fixing system includes a central column, a yaw shell and a fixing ring, the upper shell of the yaw shell is connected to the lower shell through a shell connecting rod, the upper shell and the lower shell are sleeved with the central column and the yaw shell is limited by the fixing ring, a top bracket mounting groove is arranged around the periphery of the upper shell, a telescopic drive guide groove is arranged at the lower end of the lower shell, a fine-tuning drive boss is connected to the bottom end of the lower shell, a fine-tuning drive guide groove is arranged in the middle of the fine-tuning drive boss, and a bottom bracket mounting groove is arranged at the bottom of the fine-tuning drive boss.

[0011] Preferably, a plurality of fixing screw holes are symmetrically arranged on the side surface of the fixing ring.

[0012] Preferably, the propulsion system comprises an upper rotating bracket, a lower rotating bracket, a blade bracket, a rotating cylinder and a blade, the blade bracket rotating shaft holes of the blade bracket are respectively embedded with the first rotating shaft and the blade bracket rotating shaft, the rotating cylinder is sleeved on the blade bracket connecting rod, and the rotating cylinder is fixedly connected to one side of the blade; wherein, an upper rotating bracket center ring is provided in the middle part of the upper rotating bracket, and a plurality of upper rotating bracket rods are radially symmetrically distributed around the upper rotating bracket center ring along the diameter of the upper rotating bracket center ring, and a first rotating shaft is provided on one side of the middle part of the upper rotating bracket rod.

[0013] Preferably, a lower rotating bracket center ring is provided in the middle part of the lower rotating bracket, and a plurality of first lower rotating bracket rods are radially symmetrically distributed around the lower rotating bracket center ring along the diameter of the lower rotating bracket center ring, a push rod guide groove is provided on the side of the first lower rotating bracket rod close to the lower rotating bracket center ring, and a second lower rotating bracket rod is provided on the other side of the first lower rotating bracket rod, the first lower rotating bracket rod and the second lower rotating bracket rod are connected by a plurality of rotating bracket rod connecting columns, a vertical guide column is provided at the junction of the second lower rotating bracket rod and the lower rotating bracket center ring, and a blade bracket rotating axis is provided at the middle upper position of the second lower rotating bracket rod.

[0014] Preferably, the blade bracket comprises an upper blade bracket rod and a lower blade bracket rod connected at both ends of the blade bracket connecting rod, and the lower blade bracket rod and the upper blade bracket rod are both provided with a blade slide groove on the side where the blade bracket connecting rod is connected, and a blade bracket rotating shaft hole is provided on the other side in the middle of the blade slide groove, and a rotating wheel mounting shaft is provided at one end of the lower blade bracket rod and the upper blade bracket rod away from the blade bracket connecting rod, and a sliding rod moving shaft is provided at the other end of the lower blade bracket rod along the setting direction of the blade bracket connecting rod, and bevel gear fixing bosses are provided on radial sides of the lower blade bracket rod between the sliding rod moving shaft and the blade bracket connecting rod, and a straight tooth limiting hole, a second bevel gear mounting hole and a driving tooth mounting hole are provided in sequence on the lower blade bracket rod between the bevel gear fixing bosses from the side close to the sliding rod moving shaft.

[0015] Preferably, the blade telescopic system includes a slide rod, a spur gear, a second bevel gear, a first bevel gear, a driving gear, a conveyor belt, a rotating wheel and a pull line; the slide rod includes a first annular slide sleeve and a second slide sleeve, the first slide sleeve and the second slide sleeve are fixedly connected by a connecting rod, and a slide rod guide ball is fixedly connected to one side of the first slide sleeve; the spur gear includes a spur gear ring and a spur gear rod, and the rotating wheel is a hollow annular roller; the slide rod guide ball is embedded in the telescopic drive guide groove, the first slide sleeve is embedded in the vertical guide column, the second slide sleeve is embedded in the slide rod moving shaft, and the spur gear ring is embedded in the second slide sleeve; the first bevel gear is arranged on the bevel gear fixing boss and keeps meshing with the spur gear, the second bevel gear is arranged in the second bevel gear mounting hole and keeps meshing with the first bevel gear, the driving gear is arranged in the driving gear mounting hole and keeps meshing with the second bevel gear, and at the same time, the driving gear is kept meshing with the rotating cylinder, the rotating wheel is arranged on the rotating wheel mounting shaft, and the rotating cylinder and the rotating wheel are connected by a conveyor belt, and the two ends of the pull line are respectively connected with the blade and the rotating wheel.

[0016] Preferably, the sliding rod guide ball, the first sliding sleeve and the second sliding sleeve are in the same horizontal plane.

[0017] Preferably, the blade fine-tuning system comprises a push rod, which is in the form of a tripod, one end of which is provided with a push rod guide ball, and the other end of which is provided with a push rod guide rod.

[0018] Preferably, the push rod guide ball is embedded in the fine-tuning drive guide groove, the push rod guide rod is movably connected to the bottom end of the blade bracket, and the bottom of the push rod is embedded in the push rod guide groove; when the upper rotating bracket and the lower rotating bracket rotate, the push rod guide ball moves in the fine-tuning drive guide groove, thereby pushing the push rod to move in the push rod guide groove, and under the guidance of the push rod guide rod, the blade bracket rotates around the first rotation axis and the blade bracket rotation axis, thereby realizing fine-tuning of the direction of the blade bracket.

[0019] Beneficial effects of the present invention:

[0020] This solution provides the entire wind turbine with an installation fulcrum and a rotation axis through a fixing system, and the pushing system is installed on the fixing system. Under the action of wind force, the pushing system pushes the wind turbine to rotate. During the rotation process, the blade extension system guides the blades to expand on the downwind side to receive wind force, and to close on the upwind side, thereby reducing the resistance on the upwind side. In addition, when the upper rotating bracket and the lower rotating bracket rotate, the push rod guide ball moves in the fine-tuning drive guide groove, thereby pushing the push rod to move in the push rod guide groove. Under the guidance of the push rod guide rod, the blade bracket will rotate around the first rotation axis and the blade bracket rotation axis, realizing the extension of the blades and the fine-tuning of the direction of the blade bracket without using an additional motor drive, thereby ensuring that the plane where the blades are located during the rotation process is perpendicular to the wind direction, so that the blades can receive wind energy to the greatest extent, thereby improving the efficiency of wind energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the overall assembly of the fan of the present invention;

[0023] Figure 2 is a schematic diagram of a central column of the present invention;

[0024] Figure 3 is a schematic diagram of a yaw housing of the present invention;

[0025] Figure 4 It is a schematic diagram of a fixing ring of the present invention;

[0026] Figure 5 An exploded view of the fixing system of the present invention;

[0027] Figure 6 It is an assembly diagram of the fixing system of the present invention;

[0028] Figure 7 It is a schematic diagram of the upper rotating bracket of the present invention;

[0029] Figure 8 It is a schematic diagram of the lower rotating bracket of the present invention;

[0030] Fig. 9 The blade support of the present invention is Figure 1 Schematic diagram;

[0031] Fig.10 The blade support of the present invention is Figure 2 Schematic diagram;

[0032] Fig.11 An exploded diagram of the propulsion system of the present invention;

[0033] Fig.12 It is an assembly diagram of the propulsion system of the present invention;

[0034] Fig.13 It is a schematic diagram of an explosion of the external support system of the present invention;

[0035] Fig.14 It is a schematic diagram of the assembly of the blade telescopic system of the present invention;

[0036] Fig.15 It is an exploded schematic diagram of the blade fine-tuning system of the present invention;

[0037] Fig.16 It is a schematic diagram of the assembly of the blade fine-tuning system of the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1000, fixing system; 100, center column; 110, yaw housing; 111, upper housing; 112, lower housing; 113, housing connecting rod; 114, telescopic drive guide groove; 115, fine-tuning drive boss; 116, fine-tuning drive guide groove; 117, bottom bracket mounting groove; 118, top bracket mounting groove; 120, fixing ring; 2000, pushing system; 200, base; 200, upper rotating bracket; 201, upper rotating bracket center ring; 202, upper rotating bracket rod; 203, first rotating axis; 210, lower rotating bracket; 211, lower rotating bracket center ring; 212, first lower rotating bracket rod; 213, second lower rotating bracket rod; 214, push rod guide groove; 215, vertical guide column; 216, rotating bracket rod connecting column; 217, blade bracket rotating axis; 220, blade bracket; 221, Lower blade support rod; 222, upper blade support rod; 223, blade slide; 224, blade support shaft hole; 225, rotating wheel mounting shaft; 226, blade support connecting rod; 227, slide rod moving shaft; 228, bevel gear fixing boss; 229, straight gear limiting hole; 230, rotating cylinder; 231, driving gear mounting hole; 232, second bevel gear mounting hole; 240, blade; 3000, blade telescopic system; 300 , slide rod; 301, slide rod guide ball; 302, first slide sleeve; 303, second slide sleeve; 310, straight teeth; 311, straight tooth collar; 312, straight tooth gear rod; 320, second bevel teeth; 330, first bevel teeth; 340, drive teeth; 350, conveyor belt; 360, rotating wheel; 370, pull wire; 4000, blade fine-tuning system; 400, push rod; 401, push rod guide ball; 402, push rod guide rod. DETAILED DESCRIPTION

[0040] 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.

[0041] Example 1: Figure 1As shown, a vertical axis wind turbine with automatic blade extension and retraction includes: a fixing system 1000, a propulsion system 2000, a blade extension and retraction system 3000 and a blade fine-tuning system 4000. The fixing system 1000 provides an installation fulcrum and a rotation axis for the entire wind turbine, and the propulsion system 2000 is installed on the fixing system 1000. Under the action of wind force, the propulsion system 2000 drives the wind turbine to rotate. During the rotation process, the blade extension and retraction system 3000 guides the blades to expand on the downwind side to receive wind force, and to close on the upwind side. In addition, the blade fine-tuning system 4000 guides the blades to fine-tune their direction during the rotation process, thereby ensuring that the plane where the blades are located during the rotation process is perpendicular to the wind direction, so that the blades can receive wind energy to the greatest extent.

[0042] Figure 2 is a schematic diagram of the central cylinder, such as Figure 2 As shown, the central column 100 is in the form of a cylinder and is used as the central rotation axis of the fan.

[0043] Figure 3 is a schematic diagram of the yaw housing, such as Figure 3 As shown, the yaw housing 110 is mainly composed of an upper housing 111, a lower housing 112 and a housing connecting rod 113, and the upper and lower ends of the housing connecting rod 113 are respectively connected to the upper housing 111 and the lower housing 112. The upper housing 111 is in the form of a ring, and a top bracket mounting groove 118 is arranged on the periphery of the ring. The lower housing 112 is in the form of a ring, and a telescopic drive guide groove 114 is arranged on the upper side of the periphery of the ring, and a fine-tuning drive boss 115 is arranged on the lower side of the telescopic drive guide groove 114, and a fine-tuning drive guide groove 116 is arranged on the fine-tuning drive boss 115, and a bottom bracket mounting groove 117 is arranged on the lower side of the fine-tuning drive boss 115.

[0044] Figure 4 is a schematic diagram of the fixed ring, such as Figure 4 As shown, the fixing ring 120 is mainly in the form of a circular ring, and fixing screw holes 121 are symmetrically arranged around the circular ring. The fixing ring 120 is mainly used to limit the yaw housing 110.

[0045] Figure 5 This is an exploded view of a fixed system. Figure 6 is the assembly diagram of the fixed system, such as Figure 5 and Figure 6 As shown, the fixing system 1000 is mainly composed of a central column 100, a yaw housing 110 and a fixing ring 120. Figure 2 to Figure 6 As shown, the upper shell 111 and the lower shell 112 on the yaw shell 110 are inserted into the central column 100 , and then the annular fixing ring 120 is inserted into the central column 100 and fixed tightly, so that the yaw shell 110 can be limited on the central column 100 .

[0046] Figure 7 is a schematic diagram of the upper rotating bracket, such as Figure 7 As shown, the middle of the upper rotating bracket 200 is an upper rotating bracket center ring 201 , four upper rotating bracket rods 202 are radially symmetrically distributed around the upper rotating bracket center ring 201 , and a first rotating shaft 203 is provided at the lower middle side of the upper rotating bracket rod 202 .

[0047] Figure 8 is a schematic diagram of the lower rotating bracket, such as Figure 8 As shown, the middle part of the lower rotating bracket 210 is the lower rotating bracket center ring 211, and four first lower rotating bracket rods 212 are radially symmetrically distributed around the lower rotating bracket center ring 211. A push rod guide groove 214 is provided on the side of the first lower rotating bracket rod 212 close to the lower rotating bracket center ring 211. A second lower rotating bracket rod 213 is provided on the upper side of the first lower rotating bracket rod 212, and the first lower rotating bracket rod 212 and the second lower rotating bracket rod 213 are connected by a rotating bracket rod connecting column 216. A vertical guide column 215 is provided on the inner side of the second lower rotating bracket rod 213, and a blade bracket rotating shaft 217 is provided at the middle upper side of the second lower rotating bracket rod 213.

[0048] Fig. 9 Is the blade bracket Figure 1 Schematic diagram of Fig.10 Is the blade bracket Figure 2 Schematic diagram, such as Fig. 9 and Fig.10 As shown, the upper end of the blade support 220 is an upper blade support rod 222, and the lower end is a lower blade support rod 221. One end of the lower blade support rod 221 and the upper blade support rod 222 is connected by a blade support connecting rod 226. The inner sides of the lower blade support rod 221 and the upper blade support rod 222 are both provided with a blade slide 223, and a blade support shaft hole 224 is provided in the middle of the blade slide 223. The ends of the lower blade support rod 221 and the upper blade support rod 222 are provided with a rotating wheel mounting shaft 225. The rotating wheel mounting shafts 225 on the upper and lower sides are different in style, but can both be used to install the rotating wheel. The inner side of the lower blade support rod 221 is provided with a sliding rod moving shaft 227, and two bevel gear fixing bosses 228 are provided near the sliding rod moving shaft 227. The lower blade support rod 221 near the bevel gear fixing boss 228 is provided with a straight tooth limiting hole 229, a second bevel gear mounting hole 232 and a driving gear mounting hole 231 in sequence.

[0049] Fig.11 This is an exploded diagram of the propulsion system. Fig.12 is the assembly drawing of the propulsion system. Fig.11 and Fig.12As shown, the propulsion system 2000 is mainly composed of an upper rotating bracket 200, a lower rotating bracket 210, a blade bracket 220, a rotating cylinder 230 and a blade 240. The rotating cylinder 230 is in the form of a hollow cylinder, and the blade 240 is made of a flexible material. The blade bracket rotating shaft holes 224 on the upper and lower sides of the blade bracket 220 are respectively inserted into the first rotating shaft 203 on the upper rotating bracket 200 and the blade bracket rotating shaft 217 on the lower rotating bracket 210. After being assembled, the blade bracket 220 can rotate around the axis of the first rotating shaft 203 and the blade bracket rotating shaft 217. The rotating cylinder 230 is inserted into the blade bracket connecting rod 226, and after being inserted, the rotating cylinder 230 can rotate freely around the blade bracket connecting rod 226. One side of the blade 240 is fixedly connected to the rotating cylinder 230, and the blade 240 can be rolled up when the rotating cylinder 230 rotates. The propulsion system 2000 mainly drives the upper rotating bracket 200 and the lower rotating bracket 210 to rotate under the action of wind.

[0050] Fig.13 This is an exploded diagram of the blade retracting system. Fig.14 It is the assembly diagram of the blade extension system. Fig.13 and Fig.14 As shown, the blade extension and retraction system 3000 is mainly composed of a yaw housing 110, an upper rotating bracket 200, a lower rotating bracket 210, a blade bracket 220, a rotating cylinder 230, a blade 240, a sliding rod 300, a straight tooth 310, a second bevel tooth 320, a first bevel tooth 330, a driving tooth 340, a conveyor belt 350, a rotating wheel 360 and a pull wire 370. The sliding rod 300 is mainly composed of a first annular sliding sleeve 302 and a second sliding sleeve 303. The first sliding sleeve 302 and the second sliding sleeve 303 are fixedly connected together by a connecting rod, and a sliding rod guide ball 301 is fixedly connected to the first sliding sleeve 302. The straight tooth 310 is mainly composed of a straight tooth ring 311 and a straight tooth rod 312. The rotating wheel 360 is a hollow annular roller. The upper rotating bracket 200, the lower rotating bracket 210, the blade bracket 220, the rotating cylinder 230 and the blade 240 are arranged in a circular shape. Fig.11 and Fig.12The propulsion system 2000 is assembled in the manner shown in the figure. The upper rotating bracket 200 and the lower rotating bracket 210 in the propulsion system 2000 are inserted into the yaw housing 110. The slide rod guide ball 301 on the slide rod 300 is inserted into the telescopic drive guide groove 114. The first sliding sleeve 302 is inserted into the vertical guide column 215. The second sliding sleeve 303 is inserted into the slide rod moving shaft 227. The spur gear collar 311 is inserted into the second sliding sleeve 303 and fixed. The first bevel gear 330 is installed on the bevel gear fixing boss 228 and kept in mesh with the spur gear 310. The second bevel gear 320 is installed in the second bevel gear installation hole 232 and kept in mesh with the first bevel gear 330. The drive gear 340 is installed in the drive gear installation hole 231 and kept in mesh with the second bevel gear 320. At the same time, the drive gear 340 is kept in mesh with the bottom gear on the rotating cylinder 230. The rotating wheel 360 is installed on the rotating wheel installation shaft 225, and the conveyor belt 350 is sleeved on the rotating cylinder 230 and the rotating wheel 360, and the two ends of the pull wire 370 are respectively connected to the blade 240 and the rotating wheel 360. After installation, when the blade 240 drives the upper rotating bracket 200 and the lower rotating bracket 210 to rotate, the slide rod guide ball 301 also moves in the telescopic driving guide groove 114 at the same time, and the slide rod guide ball 301 moves up and down with the change of the trajectory of the telescopic driving guide groove 114, thereby driving the slide rod 300 and the straight tooth 310 to move up and down. The up and down movement of the straight tooth 310 will drive the second bevel tooth 320 and the first bevel tooth 330 to rotate in different directions, thereby driving the driving tooth 340, the conveyor belt 350 and the rotating wheel 360 to rotate in different directions. When the driving tooth 340, the conveyor belt 350 and the rotating wheel 360 rotate in different directions, the pull wire 370 can be used to make the blade 240 curl and stretch. Generally, when moving to the downwind side, the blades 240 are expanded under the action of the blade retracting system 3000 , and when moving to the upwind side, the blades 240 are retracted under the action of the blade retracting system 3000 .

[0051] Fig.15 This is an exploded diagram of the blade fine-tuning system. Fig.16 This is the assembly diagram of the blade fine-tuning system. Fig.15 and Fig.16As shown, the blade fine-tuning system 4000 is mainly composed of a yaw housing 110, an upper rotating bracket 200, a lower rotating bracket 210, a blade bracket 220 and a push rod 400. The push rod 400 is in the form of a tripod, and a push rod guide ball 401 is provided at one end of the tripod, and a push rod guide rod 402 is provided at the other end. The upper rotating bracket 200 and the lower rotating bracket 210 are installed in the yaw housing 110, and the blade bracket 220 is installed in the upper rotating bracket 200 and the lower rotating bracket 210. The push rod guide ball 401 on the push rod 400 is inserted into the fine-tuning drive guide groove 116, and the push rod guide rod 402 is movably connected to the bottom end of the blade bracket 220. The bottom tripod of the push rod 400 is inserted into the push rod guide groove 214. After installation, when the upper rotating bracket 200 and the lower rotating bracket 210 rotate, the push rod guide ball 401 moves in the fine-tuning driving guide groove 116, thereby pushing the push rod 400 to move in the push rod guide groove 214. Under the guidance of the push rod guide rod 402, the blade bracket 220 rotates around the first rotating shaft 203 and the blade bracket rotating shaft 217, thereby achieving fine adjustment of the direction of the blade bracket 220.

[0052] After the fan is installed as a whole, under the action of wind, the blades 240 drive the upper rotating bracket 200 and the lower rotating bracket 210 to rotate. During the rotation, the blade extension system 3000 guides the blades 240 to expand to receive wind force when on the downwind side, and to retract when on the upwind side. Similarly, the blade fine-tuning system 4000 guides the blade bracket 220 to fine-tune the direction during the rotation process, thereby ensuring that the plane where the blades 240 are located is perpendicular to the wind direction during the rotation process, so that the blades 240 can receive wind energy to the greatest extent.

[0053] 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. A vertical axis fan with automatically retractable blades, characterized in that: The invention comprises a fixing system (1000), a propulsion system (2000), a blade extension and retraction system (3000) and a blade fine-tuning system (4000); the propulsion system (2000) is installed on the fixing system (1000); under the action of wind force, the propulsion system (2000) propels the fan to rotate, and during the rotation process, the blade extension and retraction system (3000) guides the blades to expand when on the downwind side to receive wind force, and to retract when on the upwind side; in addition, the blade fine-tuning system (4000) guides the blades to fine-tune their directions during the rotation process, thereby ensuring that the plane where the blades are located during the rotation process is perpendicular to the wind direction.

2. The vertical axis fan with automatically retractable blades according to claim 1, characterized in that: The fixing system (1000) comprises a central column (100), a yaw housing (110) and a fixing ring (120); an upper housing (111) of the yaw housing (110) is connected to a lower housing (112) via a housing connecting rod (113); the upper housing (111) and the lower housing (112) are sleeved with the central column (100) and the yaw housing (110) is limited by the fixing ring (120); a top bracket mounting groove (118) is arranged around the periphery of the upper housing (111); a telescopic driving guide groove (114) is arranged at the lower end of the lower housing (112); a fine-tuning driving boss (115) is connected to the bottom end of the lower housing (112); a fine-tuning driving guide groove (116) is arranged in the middle of the fine-tuning driving boss (115); and a bottom bracket mounting groove (117) is arranged at the bottom of the fine-tuning driving boss (115).

3. The vertical axis fan with automatically retractable blades according to claim 2, characterized in that: A plurality of fixing screw holes (121) are symmetrically arranged on the side surface of the fixing ring (120).

4. The vertical axis fan with automatically retractable blades according to claim 1, characterized in that: The propulsion system (2000) comprises an upper rotating bracket (200), a lower rotating bracket (210), a blade bracket (220), a rotating cylinder (230) and a blade (240); the blade bracket rotating shaft hole (224) of the blade bracket (220) is respectively inserted into the first rotating shaft (203) and the blade bracket rotating shaft (217); the rotating cylinder (230) is sleeved on the blade bracket connecting rod (226); the rotating cylinder (230) is fixedly connected to one side of the blade (240); wherein an upper rotating bracket center ring (201) is provided in the middle of the upper rotating bracket (200); a plurality of upper rotating bracket rods (202) are radially symmetrically distributed around the upper rotating bracket center ring (201) along the diameter of the upper rotating bracket center ring (201); and a first rotating shaft (203) is provided on one side of the middle of the upper rotating bracket rod (202).

5. The vertical axis fan with automatically retractable blades according to claim 4, characterized in that: A lower rotating bracket center ring (211) is arranged in the middle of the lower rotating bracket (210), and a plurality of first lower rotating bracket rods (212) are radially symmetrically distributed around the lower rotating bracket center ring (211) along the diameter of the lower rotating bracket center ring (211); a push rod guide groove (214) is arranged on one side of the first lower rotating bracket rod (212) close to the lower rotating bracket center ring (211); a second lower rotating bracket rod (213) is arranged on the other side of the first lower rotating bracket rod (212); the first lower rotating bracket rod (212) and the second lower rotating bracket rod (213) are connected by a plurality of rotating bracket rod connecting columns (216); a vertical guiding column (215) is arranged at the junction of the second lower rotating bracket rod (213) and the lower rotating bracket center ring (211); and a blade bracket rotating shaft (217) is arranged at the middle upper side of the second lower rotating bracket rod (213).

6. The vertical axis fan with automatically retractable blades according to claim 5, characterized in that: The blade support (220) comprises an upper blade support rod (222) and a lower blade support rod (221) connected at both ends of a blade support connecting rod (226); a blade slide groove (223) is provided on one side of the lower blade support rod (221) and the upper blade support rod (222) connected to the blade support connecting rod (226); a blade support rotating shaft hole (224) is provided on the other side of the middle of the blade slide groove (223); a rotating wheel mounting shaft is provided on one end of the lower blade support rod (221) and the upper blade support rod (222) away from the blade support connecting rod (226). (225), a sliding rod moving shaft (227) is arranged at the other end of the lower blade support rod (221) along the setting direction of the blade support connecting rod (226), bevel gear fixing bosses (228) are arranged on radial sides of the lower blade support rod (221) between the sliding rod moving shaft (227) and the blade support connecting rod (226), and a straight tooth limiting hole (229), a second bevel gear mounting hole (232) and a driving tooth mounting hole (231) are arranged in sequence from the side close to the sliding rod moving shaft (227) on the lower blade support rod (221) between the bevel gear fixing bosses (228).

7. The vertical axis fan with automatically retractable blades according to claim 1, characterized in that: The blade telescopic system (3000) comprises a sliding rod (300), straight teeth (310), second bevel teeth (320), first bevel teeth (330), driving teeth (340), a conveyor belt (350), a rotating wheel (360) and a pull line (370); the sliding rod (300) comprises a first sliding sleeve (302) and a second sliding sleeve (303) in an annular shape, the first sliding sleeve (302) and the second sliding sleeve (303) are fixedly connected via a connecting rod, and a sliding rod guide ball (301) is fixedly connected to one side of the first sliding sleeve (302); the straight teeth (310) comprise a straight tooth collar (311) and a straight tooth gear rod (312), and the rotating wheel (360) is a hollow annular roller; the sliding rod guide ball (301) is embedded in the telescopic driving guide groove (114), the first sliding sleeve (302) is embedded in the vertical guiding column (215), and the first sliding sleeve (302) is embedded in the vertical guiding column (215). The second sliding sleeve (303) is embedded in the sliding rod moving shaft (227), and the straight tooth ring (311) is embedded in the second sliding sleeve (303); the first bevel tooth (330) is arranged on the bevel tooth fixing boss (228) and is kept in mesh with the straight tooth (310); the second bevel tooth (320) is arranged in the second bevel tooth mounting hole (232) and is kept in mesh with the first bevel tooth (330); the driving tooth (340) is arranged in the driving tooth mounting hole (231) and is kept in mesh with the second bevel tooth (320), and the driving tooth (340) is kept in mesh with the rotating cylinder (230); the rotating wheel (360) is arranged on the rotating wheel mounting shaft (225), and the rotating cylinder (230) and the rotating wheel (360) are connected by a conveyor belt (350); and the two ends of the pull wire (370) are respectively connected with the blade (240) and the rotating wheel (360).

8. The vertical axis fan with automatically retractable blades according to claim 7, characterized in that: The sliding rod guiding ball (301), the first sliding sleeve (302) and the second sliding sleeve (303) are located on the same horizontal plane.

9. The vertical axis fan with automatically retractable blades according to claim 1, characterized in that: The blade fine-tuning system (4000) comprises a push rod (400), which is in the form of a tripod. One end of the push rod (400) is provided with a push rod guide ball (401), and the other end is provided with a push rod guide rod (402).

10. A vertical axis fan with automatically retractable blades according to claim 6 or 9, characterized in that: The push rod guide ball (401) is embedded in the fine-tuning drive guide groove (116), the push rod guide rod (402) is movably connected to the bottom end of the blade bracket (220), and the bottom of the push rod (400) is embedded in the push rod guide groove (214); when the upper rotating bracket (200) and the lower rotating bracket (210) rotate, the push rod guide ball (401) moves in the fine-tuning drive guide groove (116), thereby pushing the push rod (400) to move in the push rod guide groove (214), and under the guidance of the push rod guide rod (402), the blade bracket (220) rotates around the first rotating axis (203) and the blade bracket rotating axis (217), thereby realizing the direction fine-tuning of the blade bracket (220).

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