Frame type blade support, vertical shaft impeller and vertical shaft wind turbine generator

Abstract

The invention discloses a frame type blade support, a vertical shaft impeller and a vertical shaft wind turbine generator. The frame type blade support comprises a supporting beam, a moving pair and a fixed connecting piece. The first end of one supporting beam is provided with a sliding pair guide rail and forms sliding pair connection with the other supporting beam. And the at least three supporting beams are connected to form an interconnection structure by mutually forming a moving pair. Each supporting beam is divided into an interconnection section and an overhanging section by the moving auxiliary guide rail of the other supporting beam. And each interconnection section is provided with at least one lap joint point. The two interconnection structures are in lap joint at the lap joint points and are connected through the fixed connecting pieces to form the blade support. The multiple supporting beams are mutually restrained, and the supporting rigidity of the support is improved. The load transmitted along the supporting beam can be directly transmitted to the rotating shaft, and the force transmission path is single. And a moving pair is arranged between the two supporting beams, so that the length of supporting the blade cantilever is shortened. The blade support is easy to obtain raw materials, low in cost, easy to machine and convenient to assemble.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a frame-type blade bracket, a vertical axis impeller and a vertical axis wind turbine generator set. Background Art

[0002] Vertical axis wind turbines have a long history, and the earliest vertical axis wind turbines can be traced back to the 7th century BC. In the 20th century, major scientific research institutes around the world have conducted a lot of research and experiments on vertical axis wind turbines, especially vertical axis wind turbines based on lift-type blades, and accumulated a lot of verification data. However, as early as 1988, vertical axis wind turbines with a capacity of more than 4MW appeared, and ultimately did not become the mainstream type of wind turbines (the commercial megawatt-class wind turbines currently in operation are all horizontal axes). Vertical axis wind turbines are only likely to be selected in small or micro wind power projects. In these projects, the main advantages of vertical axis wind turbines are that they do not require a yaw system, have low noise and a simpler structure.

[0003] In the technical solutions adopted by the existing vertical axis wind turbines, the impeller usually adopts the solution that the blades are fixed on the rotating shaft through connecting rods: that is, the impeller has a rotating shaft, which is usually cylindrical. A number of connecting rods extend outward from the rotating shaft, and the ends of the connecting rods are connected to the blades. Each blade is usually connected to two connecting rods at two places near the ends of the blades. From the perspective of the support method of the connecting rods for the blades, the blades are cantilevered on the rotating shaft by the connecting rods. Usually, additional support rods are added between the two connecting rods connected to the same blade in order to increase the structural rigidity of the blade support. However, in the existing technical solutions, no matter how complex the connecting rods of the blades are, they are ultimately just a plane frame or a structure similar to a plane frame. During the operation of the vertical axis wind turbine, the impeller rotates, and the load transmitted from the blades to the rotating shaft through the connecting rods is not only gravity and axial force (pressure or tension) along the connecting rods, but also forces pointing outside the plane where the connecting rods are located (this force is also an important reason for the final formation of the impeller torque), and bending moments along multiple directions. Therefore, the existing vertical axis impeller has insufficient support structure for the blades, or in other words, the support bearing capacity of the blades.

[0004] In addition, the existing blade connecting rod connection position is roughly designed. In most cases, the blade connecting rod is very close to the impeller rotation axis in the extension direction, and some even pass through the impeller rotation axis. This causes the force along the impeller direction to actually form no torque about the impeller rotation axis (because the lever arm is almost zero), and does not contribute to the rotation. Therefore, the formation of the impeller torque in the existing technical solution mainly comes from the aerodynamic component formed on the blade along the blade chord. Regarding the above technical problem, although a patented technology has proposed a special-shaped impeller structure in order to set the blade connecting rod along the tangent direction of the impeller shaft, the solution is too ideal, which obviously causes the problem of serious lack of support capacity of the connecting rod for the blade, resulting in a loss of one thing while gaining another.

[0005] A more important issue is the length of the cantilever support of the blade connecting rod. The increase in the rated power of the vertical axis increases the length of the blades and the diameter of the impeller. Furthermore, the length of the connecting rod needs to be increased to meet the requirement of the increased impeller diameter. In the existing technical solutions, the support of the connecting rod for the blades is a simple cantilever support. This means that when the length and chord length of the blades increase, a higher specification connecting rod is required for cantilever support. The most intuitive change is that the connecting rod becomes thicker, especially the connection position with the impeller shaft. This simple widening or thickening solution will definitely increase the use of materials, the weight of the impeller and the final cost, and the support effect is not necessarily optimal.

[0006] In summary, the blade support of the blade bracket (or blade connecting rod) in the current vertical axis wind turbine still faces the following three technical problems: 1) During the operation of vertical axis wind turbines, the aerodynamic loads, gravity loads, centrifugal loads caused by blade rotation, and bending moment loads derived from these loads are generated on the blades. The simple planar rod system composed of blade brackets (or blade connecting rods) in the prior art does not have a good load-bearing capacity. How to provide a blade bracket (or blade connecting rod) with better structural rigidity through better load-bearing is still a technical problem to be solved.

[0007] 2) The aerodynamic load component generated on the blades and the centrifugal load generated by the rotation of the blades are transmitted along the blade bracket (or blade connecting rod). In the existing technical solutions, these loads contribute very little to the generation of impeller torque, or even no contribution at all. How to turn these "invalid loads" that have no effect on power generation into "effective loads" that are beneficial to power generation remains to be solved.

[0008] 3) In vertical axis wind turbines with increased blade length and chord length and larger impeller diameter, the cantilever support length of the blade bracket (or blade connecting rod) for the blade increases. How to effectively improve the support of the blade bracket (or blade connecting rod) for the blade and avoid the "inefficient" method of stacking materials and exchanging cost for effect has not been well solved so far. Summary of the invention

[0009] In order to simultaneously solve the three technical problems mentioned in the above content (note that it is not to solve one of them, but to solve three at the same time), a frame-type blade support is provided in the first aspect, which includes a support beam, a moving pair and a fixed connection member; Each of the support beams comprises a first end and a second end; The first end of each of the support beams is provided with a movable pair guide rail, and together with another of the support beams forms a movable pair connection; At least three of the support beams are connected to form an interconnected structure by mutually forming a moving pair; each of the support beams is divided into two sections, an interconnected section and an overhanging section, by a moving pair guide rail of another support beam; at least one overlap point is provided on the interconnected section of each support beam; The two interconnecting structures are overlapped at the overlap point and connected by a fixed connecting piece to form the blade bracket; Each of the support beams of the interconnected structure forms a blade support group with one of the support beams of another interconnected structure to jointly support the same blade; the distance between the first ends of the two support beams of the blade support group is greater than the distance between the second ends; There are at least three blade support groups.

[0010] In a further technical solution, each of the support beams is formed by processing the same metal pipe or metal profile.

[0011] The length of each of the support beams in the interconnection structure is equal.

[0012] The second end of the support beam supports the blade directly or through a connecting member.

[0013] In the two support beams constituting the moving pair connection, the moving pair track of one of the support beams is located between the second end portion of the other support beam and the overlap point.

[0014] A rigidifying structure with a moving pair is also arranged between the two support beams of each blade support group.

[0015] In a second aspect, a vertical axis impeller is provided, which comprises a rotating shaft, blades and the frame-type blade support described in the first aspect; There are at least three blades, which are evenly distributed around the rotation axis of the vertical axis impeller; There are at least two blade supports, both connected to the rotating shaft; Each of the blades is simultaneously connected to at least four support beams of all the blade supports; The rotating shaft, the blades and the frame-type blade support rotate synchronously.

[0016] In a further technical solution, each of the blades is provided with at least two support connecting parts along its extension direction, and each of the support connecting parts is connected to a blade supporting group of the frame-type blade support.

[0017] The rotating shaft is connected to the frame-type blade bracket at the overlapping point of the support beam.

[0018] In a third aspect, a vertical axis wind turbine set is provided, wherein the vertical axis wind turbine set comprises the vertical axis impeller described above.

[0019] The beneficial effects of the present invention are: the movement of multiple degrees of freedom of each support beam is restricted by the fixed connection of the support beam, multiple connections are formed between the first end and the second end of each support beam, and the multiple support beams are mutually restrained, thereby increasing the overall support stiffness of the blade support. At the same time, the degrees of freedom along the direction of the support beam are released separately, so that the aerodynamic load component generated on the blade and the centrifugal force load generated by the rotation of the blade can be directly transmitted to the rotating shaft along each support beam, and the force transmission path is single and direct. First, this structure makes the support stiffness of the support better and the support capacity stronger, and can effectively cope with various complex loads in the impeller. Secondly, the force transmitted along the support beam can be more directly and effectively transmitted to the fixed connection position, forming a "payload" that is beneficial to power generation, and an impeller torque can be formed at the rotating shaft. Thirdly, each support beam is connected to another support beam by a moving pair, which is equivalent to shortening the length of each support beam supporting the blade cantilever. The support effect of the blade support is further improved. The blade support uses only one profile, the raw materials are easy to obtain, the cost is low, and the processing is simple and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a frame-type blade support according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a frame-type blade support beam connection according to an embodiment of the present invention; Figure 3 A schematic diagram of a frame-type blade support interconnection structure according to an embodiment of the present invention; Figure 4 A schematic diagram of a blade support structure interconnected by a frame type blade support according to an embodiment of the present invention; Figure 5 A schematic diagram of a blade support assembly of a frame-type blade bracket according to an embodiment of the present invention; Figure 6 A schematic diagram of a frame-type blade support connection according to an embodiment of the present invention; Figure 7 A schematic diagram of a rigid structure of a frame-type blade support according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the connection between a frame-type blade support and a blade according to an embodiment of the present invention; Fig. 9 Schematic diagram of a vertical axis impeller according to an embodiment of the present invention.

[0021] Description of Figure Numbers: 1. Support beam, 1.1. First end, 1.2. Second end, 2. Moving pair, 2.1. Moving pair guide rail, 3. Fixed connector, 4. Interconnection structure, 5. Interconnection section, 6. Overhang section, 7. Overlap point, 8. Blade support group, 9. Rigidized structure, 9.1. Rigidized structure moving pair, 9.2. Auxiliary support beam, 10. Rotating shaft, 11. Blade, 11.1. Bracket connection part, 12. Blade bracket, 13. Rotation axis.

[0022] It is worth noting that the above drawings are used to illustrate the features of the present invention, and are not intended to show any actual structure or reflect the size, relative proportions and other detailed information of various components. In order to more clearly show the principles of the present invention and to avoid unnecessary details that make the principles of the present invention unclear, the examples in the figures have been simplified. These illustrations will not cause inconvenience to technicians in the relevant fields in understanding this patent, and the actual embodiment may include more modules or components. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the embodiment of the present invention is fully described below in conjunction with the relevant drawings of the embodiment of the present invention. This patent describes only a part of the embodiments, not all of the embodiments. Based on the embodiments 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.

[0024] 1. Related technical issues of existing vertical axis wind turbine blade brackets 1) Support stiffness of blade bracket One of the functions of the blade support is to support the blade. The vertical axis wind turbine needs to have a considerable impeller diameter, so the distance between the blade and the impeller shaft is relatively long (generally, the length of the blade is about the same as the distance between the blade and the impeller shaft). The most direct, simplest and commonly used solution in the wind power industry is to set at least two blade connecting rods extending radially outward from the impeller shaft, and the ends are connected to the blades. Generally, there are only two blade connecting rods. On the one hand, the material is taken into consideration. On the other hand, too many blade connecting rods increase the obstruction to the incoming wind and affect the wind capture efficiency of the blades located in the lower direction. The blade connecting rod is processed by pipes, and some are processed by profiles, and even the cross section of the rod is made into a blade airfoil shape. However, the existing technical solutions all have more or less problems of insufficient support capacity or poor support stiffness. The so-called "insufficient support capacity or poor support stiffness" here means that the existing support structure is only suitable for bearing several of the various loads generated by the blades - for example, pressure / tension loads, gravity loads, etc. Other loads such as composite bending moment and additional bending moment (as shown in the figure) test the bending resistance of the blade support. Obviously, the existing technical solutions are still insufficient. The simplest and most easily thought of way to increase the bending resistance of the blade support is to increase the bending section. If a pipe is used, it means increasing the pipe diameter. The most intuitive effect of this method is that the connecting rod (of the blade support) becomes thicker.

[0025] The support stiffness of the blade bracket is poor, and the load of the blade will cause a large structural deformation of the blade bracket, which will directly affect the fatigue life of the blade bracket. At the same time, since the load on the blade changes significantly during one rotation, this will cause the structural deformation of the blade bracket to fluctuate significantly during one rotation of the blade. This may cause uneven distribution of the impeller structure, forming fluctuations, affecting the rotation effect of the impeller, and further aggravating the damage to components such as the shaft and bearings.

[0026] 2) Cantilever support length of blade support As the power of vertical axis wind turbines increases, it is necessary to increase the swept area of ​​the vertical axis impeller, which is the product of the blade length and the impeller diameter. It can be seen that when the power increases, the length of the blade connecting rod in the blade bracket must also increase. That is to say, the cantilever support length of the blade bracket increases. Since the relationship between the increase in the amount of cantilever support structure material and the increase in cantilever support length is nonlinear, in order to ensure the support capacity, it is necessary to greatly increase the specifications of the blade connecting rod in the blade bracket. At the same time, considering the problem of "insufficient support stiffness" raised in the above content, if it is repaired according to the idea of ​​the existing technical solution, the material cost will be very high. When the power of the vertical axis wind turbine is small (for example, a micro-unit of tens of watts or even hundreds of watts), the technical problems of "cantilever support length" and "insufficient support stiffness" faced by the blade bracket are not obvious. However, when the power of the wind turbine continues to increase, reaching more than ten kilowatts, or even tens of kilowatts, these two problems will have a very serious impact.

[0027] 2. Theoretical Basis of This Patent The core technical features of the blade bracket proposed in this patent can be summarized as follows: 1) The blade bracket connects all the support beams through moving pairs and overlaps. From the circumferential direction of the impeller rotation, the entire impeller bracket restricts the multiple degrees of freedom of all the support beams through a circle of moving pairs on the blade side. At the same time, the degrees of freedom of multiple support beams are further locked on the side close to the rotation center through multiple overlapping fixed connections. This technical solution makes the blade bracket no longer just connect the impeller shaft and blades or support the blades alone, but all the support for the blades and the transmission of the blade load become a structure involving the entire bracket. The overall stiffness of the bracket and its support capacity for the blades are significantly improved compared with the existing technical solutions.

[0028] 2) The blade bracket is interconnected and fixed to each other through the support beam, so that the actual cantilever support for the blade is the overhang section of the support beam, rather than the entire cantilever support. This technical solution significantly shortens the length of the cantilever support, making the support for the blade more reasonable. Under the premise of ensuring the support capacity, the material consumption of the bracket can be reduced.

[0029] 3) The setting of the moving pair in the blade bracket can be regarded as a distribution of the path for the load transmission of the support beam. The moving pair allows each support beam to have freedom only in its extension direction. Therefore, there is only one path for the load to be transmitted along the support beam, that is, from the second end of the support beam to the first end, and directly from the blade to the impeller shaft. When the support beam is set tangent to the impeller shaft, the axial load of the support beam can have a positive effect on the formation of the impeller torque.

[0030] 3. An embodiment of the impeller support like Figure 1 As shown, a frame-type blade support mainly consists of a support beam (1), a moving pair (2) and a fixed connection member (3).

[0031] There are at least six support beams (1), and the solution shown in this embodiment uses six support beams (1). In other embodiments, the number of support beams (1) can be increased according to the number of vertical axis wind turbine blades (11), and the total number of support beams (1) is an even number.

[0032] Each support beam (1) is formed by processing a pipe or profile of the same specification (here, the same pipe diameter). The support beam (1) shown in this embodiment is obtained by processing a pipe.

[0033] Each support beam (1) comprises a first end (1.1) and a second end (1.2). Figure 2 As shown, the first end portion (1.1) is provided with a movable pair guide rail (2.1), and together with another support beam (1) forms a movable pair connection. In this embodiment, the three support beams (1) are connected to each other by forming a movable pair to form an interconnection structure (4) (such as Figure 3 As shown). In fact, the interconnection structure (4) can also be regarded as a mutual support structure, or a mutual support structure formed by the support beams (1) being connected to each other through the moving pair (2). The lengths of the support beams (1) in the same interconnection structure (4) are all equal to ensure that the distance from the blade (11) to the rotation axis (13), that is, the impeller diameter, remains constant.

[0034] like Figure 3 As shown, in the two support beams (1) constituting the movable pair connection, one of the support beams (1) can be regarded as divided into two sections - an interconnection section (5) and an overhang section (6) - by the movable pair guide rail (2.1) of the other support beam (1). The interconnection section (5) is the section between the first end (1.1) of the support beam (1) and the movable pair (2), and the overhang section (6) is the section between the second end (1.2) of the support beam and the movable pair (2). Furthermore, at least one overlap point (7) is provided on the interconnection section (5) of each support beam (1). In this embodiment, as Figure 2 As shown, each support beam (1) is provided with two overlapping points (7).

[0035] In such Figure 4It can be seen from the plane diagram that one of the two interconnected structures (4) is set as a mirror image of the other, and then the two interconnected structures (4) that are mirror images of each other are overlapped, and the overlap position is the overlap point (7) set on the interconnected section (5) of the support beam. Finally, the two interconnected structures (4) are connected by a fixed connection piece to form a blade bracket. The fixed connection piece proposed here can be a metal belt (such as a steel belt) or an iron wire, which is similar to the binding method used when steel bars are overlapped; it can also be a split-petal metal clamp, which is finally fastened by bolts.

[0036] As shown in FIG5 , any one of the support beams (1) in one interconnection structure (4) together with one of the support beams in another interconnection structure (4) form a blade support group (8). The two support beams (1) in the blade support group (8) jointly support the same blade (11). Furthermore, the distance between the first ends (1.1) of the two support beams (1) in one blade support group (8) is greater than the distance between the second ends (1.2). In this embodiment, in fact, from the first end (1.1) to the second end (1.2), the distance between the two support beams (1) becomes closer and closer (e.g., Figure 1 and Figure 6 As shown). In actual applications, the distance between the second ends (1.2) of the two support beams of the blade support group (8) is the distance between the two connection points of the blade (11) and the support beam (1). Since the chord length of the blade (11) is limited, the distance between the two connection points is significantly smaller than the chord length. At the same time, due to load-bearing reasons (such as bending stiffness requirements), the diameter of the shaft (10) is generally larger than the chord length of the blade (11). Therefore, the technical feature that "the distance between the first ends (1.1) of the two support beams (1) of a blade support group (8) is greater than the distance between the second ends (1.2)" meets actual needs.

[0037] In this embodiment, there are three blade support groups (8), which is consistent with the number of blades (11). In other embodiments, an increase in the number of blades (11) will lead to an increase in the number of support beams (1), and the number of blade support groups (8) will also increase to match the number of blades (11).

[0038] like Figure 6As shown, in the two support beams (1) constituting the moving pair connection, the moving pair track is located between the second end (1.2) of the support beam and the overlap point (7). After the two interconnection structures (4) are fixedly connected, it can be seen that in the circumference of the blade support, firstly, a circle of fixed connection points is set around the center, that is, the fixed connection member (3) locks the two interconnection structures (4); secondly, there is another circle of moving pairs (2) on the periphery of the multiple fixed connection members (3), that is, in the direction closer to the second end (1.2) of the support beam. The setting of the moving pair (2) realizes the locking of multiple degrees of freedom of the support beam (1) (which can also be considered as the blade support).

[0039] The novelties and advantages of the above technical solution are: a) Every three support beams (1) in the blade bracket are interconnected through a movable pair (2) to form a group of interconnected structures (4), and two groups of interconnected structures (4) are fixed together to form a blade bracket. Therefore, all the support beams (1) are related to each other. The support of each support beam (1) to the blade (11) is related to the other support beams (1), instead of each connecting rod independently connecting the rotating shaft (10) and the blade (11) in the prior art. The technical solution in this embodiment realizes that the blade bracket supports multiple blades (11) dispersed in the circumferential direction as a whole in structure (not just nominally a whole). This form of structural rigidity and support capacity is obviously better than the "each family sweeps the snow in front of their own door" type of support of the blade connecting rod in the prior art.

[0040] b) The two interconnecting structures (4) are fixedly connected together at the overlap point (7), and the position of the movable pair (2) in each interconnecting structure (4) is set between the overlap point (7) and the second end (1.2) of the support blade (11). Compared with the conventional technical solution, the existence of the movable pair (2) enables each support beam (1) to be supported by the movable pair (2) in addition to the support at the overlap point (7). This structure shortens the actual cantilever length to the length between the movable pair (2) and the second end (1.2) of the support beam, that is, the length of the overhang section (6), effectively reducing the cantilever length. The most direct benefit is that, under the premise of a certain supporting capacity, the structure shown in this embodiment can use less material compared with the existing solution.

[0041] In this embodiment, the lengths of the six support beams (1) can be considered to be all equal. In other embodiments, this design may not be followed. That is, the lengths of the support beams (1) in two interconnection structures (4) may be different, but the length of the support beams (1) in each interconnection structure (4) remains the same.

[0042] like Figure 7As shown, in a blade support group (8), a rigidifying structure (9) can be further provided between two support beams (1). The rigidifying structure (9) is provided at the overhanging sections (6) of the two support beams, and is mainly composed of a rigidifying structure moving pair (9.1) and an auxiliary support beam (9.2). This rigidifying structure (9) is particularly suitable for vertical axis impellers (units) with higher rated power and larger impeller diameters. This is because the overhanging section (6) of the support beam in a vertical axis impeller (unit) with a larger impeller diameter is also relatively long. According to the aforementioned technical features, as Figure 1 As shown, in a blade support group (8), the overhanging sections (6) of the two support beams have no additional constraints. When the length of the overhanging section (6) increases, its support stiffness will inevitably decrease. In this embodiment, the overhanging sections (6) of the two support beams are interconnected by a rigidifying structure (9), thereby improving the overall stiffness. Similar to the role of the movable pair (2) provided in the interconnecting structure (4) in the blade support, the overhanging sections (6) of the two support beams are not directly rigidly connected together. The rigidifying structure movable pair (9.1) ensures the release of the degree of freedom of the extension direction of the support beam (1), so that the axial load of the support beam (1) still has only one transmission path, while also limiting other degrees of freedom.

[0043] like Figure 8 As shown, the second end portion (1.2) of the support beam is connected to the blade (11). In an embodiment, a structure for connection (such as a pin hole) may be directly provided at the second end portion (1.2) of the support beam. An additional connecting member may also be provided to connect the blade (11) and the support beam (1).

[0044] 4. An embodiment of a vertical axis impeller like Fig. 9 As shown, in the vertical axis impeller, there are at least three blades (11). And they are evenly distributed around the rotation axis (13) of the vertical axis impeller. A conventional vertical axis impeller can operate normally with at least two blades (11) (even theoretically, there can be only one blade (11)). However, in the blade support technical solution proposed in this patent, the interconnection structure (4) needs to be composed of at least three support beams (1). Because there are at least three blades (11).

[0045] There are at least two blade supports (12), and the technical solution provided in this embodiment only includes two blade supports (12), which are respectively connected to the top and bottom of the rotating shaft (10). Each blade (11) is provided with two support connection parts (11.1) in its extension direction, and each support connection part (11.1) is connected to a blade support group (8). In other words, each blade (11) is simultaneously connected to a total of four support beams (1) of all blade supports (12).

[0046] In some other embodiments, especially embodiments in which the blade (11) is relatively long, adding a blade support (12) can increase the rigidity of the blade (11), thus playing a positive role in supporting the blade (11).

[0047] In the vertical shaft impeller, it can be considered that the rotating shaft (10), the blades (11) and the frame-type blade support (12) are rigidly connected together and rotate synchronously (i.e., relatively static). No bearing-like components are arranged between the blade support (12) and the rotating shaft (10).

[0048] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up, down, front, back, left and right" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A frame-type blade support, characterized in that: It comprises a support beam (1), a movable pair (2) and a fixed connection member (3); Each of the support beams (1) comprises a first end (1.1) and a second end (1.2); The first end portion (1.1) of each support beam (1) is provided with a movable pair guide rail (2.1), and together with another support beam (1) forms a movable pair connection; At least three of the support beams (1) are connected to each other by means of a movable pair to form an interconnected structure (4); each of the support beams (1) is divided into two sections, an interconnected section (5) and an overhanging section (6), by a movable pair guide rail (2.1) of another support beam (1); at least one overlap point (7) is provided on the interconnected section (5) of each of the support beams (1); The two interconnecting structures (4) are overlapped at the overlap point (7) and are connected via a fixed connection piece (3) to form the blade support; Each of the support beams (1) of the interconnection structure (4) forms a blade support group (8) with one of the support beams (1) of another interconnection structure (4), and together support the same blade; the distance between the first end portions (1.1) of the two support beams (1) of the blade support group (8) is greater than the distance between the second end portions (1.2); There are at least three blade support groups (8).

2. A frame-type blade support according to claim 1, characterized in that: Each of the support beams (1) is formed by processing the same metal pipe or metal profile.

3. A frame-type blade support according to claim 1, characterized in that: The lengths of each of the support beams (1) in the interconnection structure (4) are equal.

4. A frame-type blade support according to claim 1, characterized in that: The second end portion (1.2) of the support beam supports the blade (11) directly or through a connecting member.

5. The frame-type blade support according to claim 1, characterized in that: In the two support beams (1) constituting the movable joint connection, the movable joint track of one of the support beams is located between the second end (1.2) of the other support beam and the overlap point (7).

6. A frame type blade support according to claim 1, characterized in that: A rigidifying structure (9) is also provided between the two support beams (1) of each blade support group (8).

7. A vertical axis impeller, characterized in that: It comprises a rotating shaft (10), a blade (11) and a frame-type blade support (12) as described in claims 1 to 6; The blades (11) are at least three and are evenly distributed around the rotation axis (13) of the vertical axis impeller; There are at least two blade supports (12), both connected to the rotating shaft (10); Each of the blades (11) is simultaneously connected to a total of at least four support beams (1) of all the blade supports (12); The rotating shaft (10), the blades (11) and the frame-type blade support (12) rotate synchronously.

8. A vertical axis impeller according to claim 7, characterized in that: Each blade (11) is provided with at least two support connection parts along its extension direction, and each of the support connection parts is connected to a blade support group (8) of a frame-type blade support (12).

9. A vertical axis impeller according to claim 7, characterized in that: The rotating shaft (10) and the frame-type blade support (12) are connected at the overlapping point (7) of the support beam.

10. A vertical axis wind turbine, characterized in that: It comprises a vertical axis impeller, a generator and a tower as described in any one of claims 7 to 9.

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