Telescopic blade of vertical shaft fan and vertical shaft fan

Abstract

The vertical shaft fan telescopic blade comprises a main rod and a plurality of blade bodies evenly arranged in the circumferential direction of the main rod, an upper connecting rod and a lower connecting rod are connected between the blade bodies and the main rod, the upper connecting rod is arranged above the lower connecting rod, and the two ends of the upper connecting rod are hinged to the main rod and the blade bodies respectively. Two ends of the lower connecting rod are respectively hinged with the main rod and the blade; the lower connecting rod or the blade is connected with a driving mechanism through a movable connecting rod; the driving mechanism drives the lower connecting rod or the blade to swing through the movable connecting rod, so that the blade can swing up and down along the main rod through connection of the upper connecting rod and the lower connecting rod. According to the utility model, the adaptability of the fan to environments with different wind speeds can be effectively enhanced, the service life of the fan is prolonged, the operation stability is ensured, the space requirement and the operation difficulty are reduced, the maintenance cost and difficulty are reduced, and the overall economy and convenience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power generation, specifically relates to a vertical axis fan telescopic blade and vertical axis fan. BACKGROUND

[0002] Offshore vertical axis wind turbines are one of the key equipment for offshore wind power generation. Under the dual driving of energy demand growth and environmental protection, offshore wind power industry has developed rapidly. Traditional horizontal axis wind turbines face many challenges in offshore applications, such as stability problems under complex sea conditions, and difficulty in installation and maintenance.

[0003] Vertical axis wind turbines have gradually attracted attention due to their unique structural advantages. They do not require yaw systems and can adapt to different wind directions. The structure is relatively simple, which reduces the installation and maintenance costs to a certain extent. However, the existing offshore vertical axis wind turbine blade technology still has some shortcomings. Most blades are fixed in size and shape, and cannot flexibly adjust the wind energy capture efficiency in different wind speed environments. When the wind speed is too high, the wind turbine may be damaged due to the inability to effectively adjust the blade stress, affecting the reliability and service life of the wind turbine; in low wind speed environment, the wind energy cannot be fully utilized due to unreasonable blade design, reducing the power generation efficiency.

[0004] Vertical axis wind turbines mainly rely on the rotation of the blades on the vertical axis to convert wind energy into mechanical energy. The working principle is as follows: when the wind blows towards the vertical axis wind turbine, the blades will be subjected to the action of the airflow. Due to the special shape and installation angle of the blades, a pressure difference is formed on both sides of the blades. Taking the common Darrieus vertical axis wind turbine as an example, the blades are in a curved shape. Under the action of the wind, the airflow speed on the convex surface of the blade is relatively fast, and the pressure is low; the airflow speed on the concave surface is slow, and the pressure is high. This pressure difference will generate a force perpendicular to the surface of the blade, which will make the blade rotate around the vertical axis.

[0005] With the rotation of the blades, the main shaft of the wind turbine also rotates, thereby transmitting mechanical energy to the generator. The generator converts mechanical energy into electrical energy under the drive of the main shaft. In the whole process, the vertical axis wind turbine can utilize wind from different directions without the need for yaw operation to align the wind direction like horizontal axis wind turbines, which gives it an advantage in environments with variable wind directions, but the existing vertical axis wind turbines still have the following problems:

[0006] Blades cannot be adjusted: most existing vertical axis wind turbine blades are fixed structures and cannot be flexibly expanded or retracted according to wind speed and other conditions. When the wind speed changes, the wind energy capture efficiency cannot be effectively adjusted, which may be damaged by excessive stress in strong winds, and the wind energy cannot be fully utilized in low wind speed, resulting in unstable power generation efficiency.

[0007] Complex structure or poor adaptability: some existing vertical axis wind turbines may have complex structure design, and their stability and reliability need to be improved when facing complex sea conditions such as strong wind and sea wave impact.

[0008] Insufficient wind energy utilization: due to the inability of the blades to dynamically adjust, the existing vertical axis wind turbine is difficult to maintain in the best wind energy capturing state under different wind direction and wind speed combinations in actual working conditions, and the overall wind energy utilization efficiency is relatively low, which cannot fully exert the advantages of abundant wind energy resources at sea. SUMMARY

[0009] The utility model aims at providing a vertical axis wind turbine telescopic blade and vertical axis wind turbine, can effectively enhance the adaptability of fan to different wind speed environment, prolong the service life of fan, guarantee operation stability, reduce space demand and operation difficulty, reduce maintenance cost and difficulty, improve overall economy and convenience.

[0010] The technical scheme adopted by the utility model is:

[0011] A vertical axis wind turbine telescopic blade, comprising a main rod and a plurality of blades arranged uniformly along the circumference of the main rod, an upper connecting rod and a lower connecting rod are connected between the blade and the main rod, the upper connecting rod is arranged above the lower connecting rod, the two ends of the upper connecting rod are respectively hinged to the main rod and the blade, the two ends of the lower connecting rod are respectively hinged to the main rod and the blade, and the lower connecting rod or the blade is connected with a driving mechanism through a movable connecting rod; the driving mechanism drives the lower connecting rod or the blade to swing through the movable connecting rod, so that the blade can swing up and down along the main rod through the connection of the upper connecting rod and the lower connecting rod.

[0012] Further, the length direction of the blade is consistent with the length direction of the main rod, that is, the blade and the main rod are both arranged vertically.

[0013] Preferably, an upper fixed ring and a lower fixed ring are fixedly arranged on the main rod from top to bottom, the upper connecting rod is pivoted to the upper fixed ring, and the lower connecting rod is pivoted to the lower fixed ring.

[0014] Preferably, grooves are formed in the edges of the upper fixed ring and the lower fixed ring, and the upper connecting rod and the lower connecting rod are movably installed in the grooves of the edges of the upper fixed ring and the lower fixed ring.

[0015] Preferably, an upper rotating seat and a lower rotating seat are fixedly arranged on the inner side of the blade from top to bottom, the upper connecting rod is pivoted to the upper rotating seat, and the lower connecting rod is pivoted to the lower rotating seat.

[0016] Preferably, the upper fixed ring and the lower fixed ring are fixedly connected with the main rod by welding or fasteners.

[0017] Preferably, the upper connecting rod and the lower connecting rod have the same length, which is convenient for adjustment.

[0018] Preferably, the length of the lower link is greater than the length of the upper link; the lower end of the blade is slightly outwardly inclined in the folded state, facilitating outward bracing when unfolded.

[0019] Preferably, the driving mechanism comprises a movable ring sleeved on the main rod and a driving source connected with the movable ring, the movable ring being slidable up and down along the main rod, the outer end of the lower link being provided with an adapter rotary seat, the adapter rotary seat on the lower link being pivotally connected with one end of the corresponding movable link, the other end of the movable link being pivotally connected with the movable ring.

[0020] The driving source is a telescopic cylinder or a lead screw motor.

[0021] In order to facilitate the operation of unfolding and folding the blades, the end portion of the lower link close to the blade is fixedly provided with an adapter rotary seat, the end portion of the adapter rotary seat is movably provided with an oscillatable movable link, the position of the main rod on the side of the lower fixed ring is movably provided with a movable ring slidable up and down along the lower fixed ring, the movable ring is movably connected with the movable link, when the movable ring slides up and down, the connection angle of the movable link and the adapter rotary seat is changed, so that the lower link oscillates up and down, when the lower link oscillates, the blade and the related components of the upper link are used to stably unfold the blade upward until the blade completes the state change of unfolding and folding.

[0022] Preferably, the adapter rotary seat and the lower link are perpendicular to each other, facilitating the calculation of the oscillation angle of the movable link.

[0023] Preferably, each blade corresponds to a set of upper links, lower links and movable links, the upper links, lower links and movable links of the same set are in the same position in the horizontal projection, and the three are overlapped.

[0024] The number of blades is 3 sets, and the three sets of blades are evenly distributed around the main rod at an angle of 120 degrees.

[0025] Preferably, the main rod is provided with a wind speed sensor on one side or the top, and the wind speed sensor is connected with the driving mechanism.

[0026] A vertical shaft fan comprises the above-mentioned telescopic blade of vertical shaft fan and a generator, and the main rod of the telescopic blade of vertical shaft fan is connected with the input shaft of the generator.

[0027] The utility model discloses the beneficial effects are:

[0028] The utility model discloses a driving mechanism drives lower connecting rod and vane swing through movable connecting rod, and the vane can swing along the main pole up and down through the connection of upper connecting rod and lower connecting rod, adjusts the unfolding distance between vane and main pole, can flexibly adjust vane area or angle according to wind speed change in the adjustment wind energy capture, and each vane contracts and reduces stress to main pole when wind speed is high, each vane unfolds and promotes capture efficiency when wind speed is low, can effectively enhance the adaptability of fan to different wind speed environment, stabilizes electric energy output, telescopic vane can change vane and airflow action state, reduces strong wind impact and vibration, reduces component wear and tear and fatigue, prolongs fan service life, guarantees operation stability, its retractable characteristic is convenient for transportation and installation, reduces space requirement and operation difficulty, and when maintaining, more easily approaches and overhauls vane and related parts, reduces maintenance cost and difficulty, improves overall economy and convenience, especially suitable for offshore wind energy utilization. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the front view of telescopic vane of vertical axis fan in the utility model embodiment under the unfolded state.

[0030] Figure 2 It is the perspective view of telescopic vane of vertical axis fan in the utility model embodiment under the unfolded state.

[0031] Figure 3 It is the plan view of telescopic vane of vertical axis fan in the utility model embodiment under the unfolded state.

[0032] Figure 4 It is the perspective view of telescopic vane of vertical axis fan in the utility model embodiment under the retracted state.

[0033] Figure 5 It is the front view of telescopic vane of vertical axis fan in the utility model embodiment under the retracted state.

[0034] Figure 6 It is the plan view of telescopic vane of vertical axis fan in the utility model embodiment under the retracted state.

[0035] In the drawing: 1-main pole;2-vane;3-upper fixed ring;4-lower fixed ring;5-upper connecting rod;6-lower connecting rod;7-upper rotary seat;8-lower rotary seat;9-adapter rotary seat;10-movable ring;11-movable connecting rod. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in combination with the drawing and embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0037] In the description of the utility model, it needs to be understood that, if there are the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.In the description of the utility model, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected.It can be mechanically connected, or electrically connected.It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements.For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the description of the utility model, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected.It can be mechanically connected, or electrically connected.It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements.For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Embodiment 1

[0040] A vertical axis fan telescopic blade, as shown in Figures 1-6 The utility model discloses a vertical axis fan telescopic blade, as shown in formula (1), including the main rod 1 and the multiple blades 2 that are arranged along the circumference of the main rod 1 evenly, and the upper connecting rod 5 and the lower connecting rod 6 are connected between every blade 2 and the main rod 1, the upper connecting rod 5 is arranged at the upper of the lower connecting rod 6, and the both ends of the upper connecting rod 5 are hinged with the main rod 1 and the blade 2 respectively, the both ends of the lower connecting rod 6 are hinged with the main rod 1 and the blade 2 respectively, and the lower connecting rod 6 or the blade 2 is connected with the drive mechanism through the movable connecting rod 11, the drive mechanism swings the lower connecting rod 6 or the blade 2 through the movable connecting rod 11, and the blade 2 can swing up and down along the main rod 1 through the connection of the upper connecting rod 5 and the lower connecting rod 6.

[0041] Further, the length direction of the blade 2 is consistent with the length direction of the main rod 1, that is, the blade and the main rod are vertically arranged, and the cross section of the blade is drop-shaped or elliptical leaf-shaped.

[0042] Further, the upper fixed ring 3 and the lower fixed ring 4 are sequentially fixed on the main rod 1 from top to bottom, the upper connecting rod 5 is pivoted with the upper fixed ring 3 and connected with the main rod 1 through the upper fixed ring 3, and the lower connecting rod 6 is pivoted with the lower fixed ring 4 and connected with the main rod 1 through the lower fixed ring 4.

[0043] Further, the upper fixed ring 3 and the lower fixed ring 4 are sequentially fixed on the main rod 1 from top to bottom, the upper connecting rod 5 is pivoted with the upper fixed ring 3 and connected with the main rod 1 through the upper fixed ring 3, and the lower connecting rod 6 is pivoted with the lower fixed ring 4 and connected with the main rod 1 through the lower fixed ring 4.

[0044] Further, the upper fixed ring 3 and the lower fixed ring 4 are sequentially fixed on the main rod 1 from top to bottom, the upper connecting rod 5 is pivoted with the upper fixed ring 3 and connected with the main rod 1 through the upper fixed ring 3, and the lower connecting rod 6 is pivoted with the lower fixed ring 4 and connected with the main rod 1 through the lower fixed ring 4.

[0045] Further, the upper fixed ring 3 and the lower fixed ring 4 are sequentially fixed on the main rod 1 from top to bottom, the upper connecting rod 5 is pivoted with the upper fixed ring 3 and connected with the main rod 1 through the upper fixed ring 3, and the lower connecting rod 6 is pivoted with the lower fixed ring 4 and connected with the main rod 1 through the lower fixed ring 4.

[0046] Further, the upper fixed ring 3 and the lower fixed ring 4 are sequentially fixed on the main rod 1 from top to bottom, the upper connecting rod 5 is pivoted with the upper fixed ring 3 and connected with the main rod 1 through the upper fixed ring 3, and the lower connecting rod 6 is pivoted with the lower fixed ring 4 and connected with the main rod 1 through the lower fixed ring 4.

[0047] Further, the length of the lower connecting rod 6 is greater than that of the upper connecting rod 5, so that the lower end of the blade 2 is slightly outwardly inclined in the folded state, facilitating the outward support in the unfolded state.

[0048] Embodiment 2

[0049] On the basis of embodiment 1, the driving mechanism is further limited, and the performance of the limited embodiment 2 is more excellent.

[0050] The driving mechanism comprises a movable ring 10 sleeved on the main rod 1 and a driving source, the driving source is connected with the movable ring 10, the movable ring 10 can slide up and down along the main rod 1, the outer end of the lower connecting rod 6 is provided with an adapter rotating seat 9, the adapter rotating seat 9 on the lower connecting rod 6 is pivoted with one end of a corresponding movable connecting rod 11, and the other end of the movable connecting rod 11 is pivoted with the movable ring 10.

[0051] The driving source is a telescopic cylinder or a lead screw motor, and the telescopic end of the telescopic cylinder or the lead screw motor is connected with the movable ring 10 to drive the movable ring 10 to slide up and down along the main rod 1.

[0052] In order to facilitate the operation of the blade 2 to expand and retract, the lower connecting rod 6 is fixedly installed with an adapter rotating seat 9 near the end of the blade 2, the end of the adapter rotating seat 9 is movably installed with an oscillatable movable connecting rod 11, the main rod 1 is movably installed with a movable ring 10 which can slide up and down on the lower fixed ring 4 at a position on the side of the lower fixed ring 4, the movable ring 10 is movably connected with the movable connecting rod 11, when the movable ring 10 slides up and down, the connection angle of the movable connecting rod 11 and the adapter rotating seat 9 is changed, so that the lower connecting rod 6 oscillates up and down, when the lower connecting rod 6 oscillates, the blade 2 and the related components of the upper connecting rod 5 are used to stably expand the blade 2 upward until the blade 2 completes the state change of expansion and retraction.

[0053] Further, the adapter rotating seat 9 is perpendicular to the lower connecting rod 6, which facilitates the calculation of the oscillation angle of the movable connecting rod 11.

[0054] Further, each blade 2 corresponds to a set of upper connecting rods 5, lower connecting rods 6 and movable connecting rods 11, the upper connecting rods 5, lower connecting rods 6 and movable connecting rods 11 of the same set are in the same position in horizontal projection, and the three are overlapped.

[0055] The number of blades 2 is three sets, and the three sets of blades 2 are evenly distributed around the main rod 1 at an angle of 120 degrees.

[0056] Further, the main rod 1 is provided with a wind speed sensor on one side or the top, the wind speed sensor is connected with the driving mechanism, according to the wind speed detected by the wind speed sensor, the driving mechanism drives the adjusting movable ring 10 to move to the corresponding position, adjusts the expansion degree of the blade 2, flexibly adjusts the blade area or angle according to the change of wind speed, reduces the stress when the wind speed is high, expands to improve the capture efficiency when the wind speed is low, effectively enhances the adaptability of the fan to different wind speed environments, and stabilizes the power output.

[0057] Embodiment 3

[0058] A vertical axis fan is constructed on the basis of embodiment 1 or 2.

[0059] A vertical axis fan, comprising the above-mentioned vertical axis fan telescopic blade and a generator, the main rod 1 of the vertical axis fan telescopic blade is connected with the input shaft of the generator; when the wind force acts on the blade, the blade drives the main rod to rotate, the rotation of the main rod in turn drives the generator to generate electricity, by controlling the telescopic state of the blade, the power generation efficiency of the generator under different wind speeds can be effectively improved.

[0060] The working principle of the utility model is: in the aspect of adjusting wind energy capture, it can flexibly adjust the blade area or angle according to the wind speed change, reduce the stress when the wind speed is high, expand to improve the capture efficiency when the wind speed is low, effectively enhance the adaptability of the fan to different wind speed environment, and stabilize the power output. In terms of fan stability, the telescopic blade can change the blade and airflow action state, reduce strong wind impact and vibration, reduce component wear and fatigue, prolong the service life of the fan, and ensure operation stability. In transportation, installation and maintenance, the retractable feature facilitates transportation and installation, reduces space requirements and operation difficulty, and is easier to access and overhaul the blade and related components during maintenance, reduces maintenance cost and difficulty, improves overall economy and convenience.

[0061] In conclusion, the telescopic blade of the vertical shaft fan and the vertical shaft fan generator realize the telescopic function of the blade by adopting the unique connecting rod mechanism and driving mechanism, can automatically adjust the area and angle of the blade according to the change of wind speed, improve the efficiency and adaptability of the fan under different working conditions, have the advantages of simple structure, low cost, easy installation and maintenance, and have wide market application prospect.

[0062] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations exist in any such actual relationship or order. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0063] It should be understood that the above description can be improved or changed by those skilled in the art, and all these improvements and changes shall fall within the protection scope of the appended claims of the utility model.

Claims

1. A vertical axis wind turbine telescopic blade, characterized by: The vertical axis fan includes a main rod (1) and a plurality of blades (2) arranged evenly along the circumference of the main rod (1), and an upper connecting rod (5) and a lower connecting rod (6) are connected between the blades (2) and the main rod (1), the upper connecting rod (5) is arranged above the lower connecting rod (6), both ends of the upper connecting rod (5) are hingedly connected with the main rod (1) and the blade (2), both ends of the lower connecting rod (6) are hingedly connected with the main rod (1) and the blade (2), and the lower connecting rod (6) or the blade (2) is connected with a driving mechanism through a movable connecting rod (11).

2. The vertical axis wind turbine telescopic blade of claim 1, wherein: The upper fixed ring (3) and the lower fixed ring (4) are sequentially and fixedly arranged on the main rod (1) from top to bottom, the upper connecting rod (5) is pivotally connected with the upper fixed ring (3), and the lower connecting rod (6) is pivotally connected with the lower fixed ring (4).

3. The vertical axis wind turbine telescopic blade of claim 1, wherein: The upper rotating seat (7) and the lower rotating seat (8) are sequentially and fixedly arranged on the inner side of the blade (2) from top to bottom, the upper connecting rod (5) is pivotally connected with the upper rotating seat (7), and the lower connecting rod (6) is pivotally connected with the lower rotating seat (8).

4. The vertical axis wind turbine telescopic blade of claim 1, wherein: The upper fixed ring (3) and the lower fixed ring (4) are fixedly connected with the main rod (1) through welding or fasteners.

5. The vertical axis wind turbine telescopic blade of claim 1, wherein: The upper connecting rod (5) and the lower connecting rod (6) have the same length.

6. The vertical axis wind turbine telescopic blade of claim 1, wherein: The length of the lower connecting rod (6) is greater than that of the upper connecting rod (5).

7. The vertical axis wind turbine telescopic blade of claim 1, wherein: The driving mechanism includes a movable ring (10) sleeved on the main rod (1) and a driving source, the driving source is connected with the movable ring (10), the movable ring (10) can slide up and down along the main rod (1), the outer end of the lower connecting rod (6) is provided with an adapter rotating seat (9), the adapter rotating seat (9) on the lower connecting rod (6) is pivotally connected with one end of the corresponding movable connecting rod (11), and the other end of the movable connecting rod (11) is pivotally connected with the movable ring (10).

8. The vertical axis wind turbine telescopic blade of claim 7, wherein: The adapter rotating seat (9) is perpendicular to the lower connecting rod (6).

9. The vertical axis wind turbine telescopic blade of claim 1, wherein: A wind speed sensor is arranged on one side or the top of the main rod (1) and connected with the driving mechanism.

10. A vertical axis wind turbine characterised in that: The vertical axis fan includes a main rod (1) and a plurality of blades (2) arranged evenly along the circumference of the main rod (1), and an upper connecting rod (5) and a lower connecting rod (6) are connected between the blades (2) and the main rod (1), the upper connecting rod (5) is arranged above the lower connecting rod (6), both ends of the upper connecting rod (5) are hingedly connected with the main rod (1) and the blade (2), both ends of the lower connecting rod (6) are hingedly connected with the main rod (1) and the blade (2), and the lower connecting rod (6) or the blade (2) is connected with a driving mechanism through a movable connecting rod (11).

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