Blade having pull cable

Abstract

A blade (1) having a pull cable, which comprises a resistive rod and a pull cable; the resistive rod extends outwards along the left and right sides and / or the front and rear sides of the blade (1); and the pull cable is arranged between the resistive rod and the blade (1).

Description

A blade with a pull rope Technical Field

[0001] The invention relates to the technical field of wind power generation, in particular to a blade with a pull rope. Background Art

[0002] A wind turbine mainly includes a tower, a generator, a hub and an impeller, wherein the impeller includes multiple blades. When the wind speed is high, especially in strong winds or typhoons, if the blades are not stiff enough, it is easy to generate torque, and when the wind rotor speed is very high, it is also easy to generate centrifugal force or even throw out, which poses certain safety hazards. The existing improvement method is to set a pull rope between the blades and the hub, or to set a pull rope between adjacent blades to solve the fatigue resistance and stability problems of the blades. However, the above two methods, on the one hand, cannot reduce the circular swing of the blades, the stability is still poor, and it is difficult to solve the root fatigue problem of the blades; on the other hand, the ability to resist positive and negative winds is poor.

[0003] Furthermore, when the blades are connected to the hub through the blade truss, the overall stability cannot be guaranteed when the wind wheel rotates due to the long length of the truss, and the root stiffness of the truss is weak, which will cause fatigue at the connection point between the root and the hub and root fatigue at the joint surface between the blade and the blade truss.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a blade with a pull rope that has high stability, fatigue resistance, strong wind resistance and high truss rigidity.

[0006] The technical solution of the present invention is: a blade with a pull rope, comprising a push rod and a pull rope; the push rod extends outward along the left and right sides and / or the front and back sides of the blade, and the pull rope is provided between the push rod and the blade.

[0007] Furthermore, the support rod includes a first support rod and / or a second support rod, the first support rod extends vertically or obliquely along the left and right sides of the blade; the second support rod extends vertically or obliquely along the front and rear sides of the blade.

[0008] Furthermore, the first push rod is arranged at an angle and is arranged on a tangent of a circle with the hub as the center and the length between the first push rod and the center as the radius; or the second push rod is arranged vertically along the blade.

[0009] Furthermore, a first pull rope is provided between the first push rod and the blade; and a third pull rope is provided between the second push rod and the blade.

[0010] Furthermore, the blade includes a blade body and a blade truss, the blade truss is arranged in the blade body and extends along the blade body, and the support rod is arranged on the extended leaf truss and is arranged close to the root of the blade body; a second pull rope is provided between the first support rod and the leaf truss extending along the blade root direction; a fourth pull rope is provided between the second support rod and the leaf truss extending along the blade root direction.

[0011] Furthermore, at least one inner pull rope is provided in the blade.

[0012] Furthermore, a short push rod extends from at least one of the front and rear sides of the blade, and an external pull rope is provided between the short push rod and the blade and / or between the short push rod and the second push rod; the short push rod and the blade are arranged obliquely or vertically.

[0013] Furthermore, a symmetrically arranged left short push rod and a right short push rod extend from the left and right sides of the blade, and an external pull rope is provided between the two short push rods and the blade and / or between the two short push rods and the first push rod.

[0014] Furthermore, multiple blades are connected to the hub, and connecting frames are provided between adjacent blades to form a ring frame structure. External pull ropes are provided between the connecting frame and the blade trusses of the blades.

[0015] Furthermore, a ring connecting rod is provided near the hub, that is, a plurality of connecting rods are connected between adjacent blades to form a ring structure; an external pull rope is provided between each connecting rod of the ring connecting rod and the corresponding connecting frame.

[0016] Beneficial effects of the present invention:

[0017] (1) By arranging a first push rod along the left and right sides of the blade and connecting an external pull rope between the first push rod and the blade, the circular swing of the blade can be reduced when the blade rotates circumferentially, ensuring stable operation and reducing the root fatigue of the joint surface between the blade and the blade truss; by arranging a second push rod along the front and back sides of the blade and connecting an external pull rope between the second push rod and the blade, it can effectively resist the front and back winds; and through the combination of the first push rod and the second push rod, a most stable structure supported on four sides can be formed, thereby resisting wind blowing from all wind directions, and the stabilizing effect is significant.

[0018] (2) By setting the first push rod at an angle, the wind resistance can be reduced when the blades rotate, and the tilting direction is the tangent of the wind wheel rotation circle, so the resistance is minimized; by setting the second push rod vertically, the supporting role of the second push rod can be maximized, making the front and rear outer pull ropes more stable and more effective in resisting front and back winds.

[0019] (3) By combining the outer pull rope with the inner pull rope, the tension of the outer pull rope can be more effectively transmitted to the inner structure of the blade, and the inner pull rope can also improve the structural stiffness of the blade and more effectively resist the front and back winds.

[0020] (4) By setting short push rods on the front and rear sides or left and right sides of the blade, the length of the external pull rope can be reduced, ensuring the stability of the external pull rope when the blade rotates, and providing the best pull rope angle to maximize the pull rope effect; and it can further reduce the fatigue of the entire blade root.

[0021] (5) By setting up a large ring frame and a small ring frame, the fatigue problem during the rotation of the wind wheel can be solved, and the stability of the wind wheel can be improved simultaneously; by setting up a ring connecting rod, the root strength and rigidity can be improved, the force transmission effect is better, and the fatigue of the root flange connection position is effectively reduced. The ring connecting rod is connected to the large ring frame and the small ring frame through a pull rope, which can effectively reduce the self-stability and fatigue problem of the large ring frame and the small ring frame and improve their own rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic structural diagram of embodiment 1 of the present invention;

[0023] FIG2 is an enlarged schematic diagram of the structure of part I of Example 1 shown in FIG1 ;

[0024] FIG3 is a schematic structural diagram of Example 2 of the present invention;

[0025] FIG4 is a schematic structural diagram of embodiment 4 of the present invention;

[0026] FIG5 is a schematic structural diagram of Example 5 of the present invention;

[0027] FIG6 is a schematic structural diagram of Example 6 of the present invention;

[0028] FIG7 is an enlarged schematic diagram of a portion of the structure of Example 6 shown in FIG6;

[0029] FIG8 is a schematic structural diagram of Example 7 of the present invention;

[0030] FIG9 is a schematic structural diagram of Example 8 of the present invention;

[0031] FIG10 is another structural diagram of Example 8 of the present invention;

[0032] FIG11 is a schematic structural diagram of Example 9 of the present invention;

[0033] FIG12 is a schematic structural diagram of embodiment 10 of the present invention;

[0034] FIG13 is a side view of a wind turbine generator set according to Embodiment 10 of the present invention;

[0035] FIG14 is a schematic diagram of the front structure of the wind wheel according to embodiment 10 of the present invention.

[0036] Explanation of the accompanying drawings: 1. Blade; 2. First push rod; 3. First pull rope; 4. Second pull rope; 5. Second push rod; 6. Third pull rope; 7. Fourth pull rope; 8. Fifth pull rope; 9. Inner pull rope; 10. Connecting frame; 11. Blade body; 12. Blade truss; 13. Blade root frame; 14. Diagonal brace; 15. Ring connecting rod; 21. Left short push rod; 22. Right short push rod; 51. Short push rod; 52. Long push rod; 53. Rear short push rod; 54. Front short push rod; 101. Sixth pull rope; 151. Seventh pull rope. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] As shown in Figures 1 and 2: A blade with a pull rope includes a first push rod 2 and a first pull rope 3; there are two first push rods 2, which extend outward along the left and right sides of the blade 1.

[0040] Specifically, the blade 1 of this embodiment includes a blade body 11 and a blade truss 12. The blade truss 12 is arranged in the blade body 11 and extends along the blade body. The first push rod 2 is connected to the extended blade truss 12 and is arranged near the root of the blade body. That is, a blade root frame 13 is arranged at the root of the blade body, and a diagonal brace 14 is provided between the blade root frame 13 and the blade truss 12. The first push rod 2 is connected to the blade root frame 13 and extends symmetrically and tilted to the left and right sides along the blade root frame 13, and the tilt direction is set on the tangent of the circle formed by the hub as the center and the length between the first push rod and the center as the radius. By setting the first push rod, this embodiment can reduce the circumferential swing of the blade when the blade rotates circumferentially, ensure its stable operation, and reduce root fatigue. The reason why the first push rod is tilted in this embodiment is that when the blade of the wind wheel rotates, the wind resistance needs to be minimized as much as possible. This tilt direction is the tangent of the blade rotation circle, which minimizes the resistance.

[0041] In this embodiment, the first push rod 2 extends symmetrically along both sides of the blade, and the first pull ropes on the left and right sides are also symmetrically arranged, which can ensure the stable operation of the blade.

[0042] In this embodiment, the first pull rope 3 is arranged between the first push rod 2 and the blade 1. There are several first pull ropes, one end of the first pull rope 3 is connected to the outer end of the first push rod 2, and the other end is connected to the blade body or the blade truss through the pull rope seat. The pull rope can be connected to both the back and the front of the blade, or only to one side. Different pull rope seats are arranged at different positions of the blade, and can be arranged at equal intervals or at non-equal intervals. Every two first pull ropes 3 are connected to the same pull rope seat, forming a triangular structure with the first push rods 2 on the left and right sides. For example, in this embodiment, six first pull ropes are arranged, and a pull rope seat is provided at a position on one side of the blade deviating from the middle, and three pull rope seats are arranged at equal intervals. Every two pull ropes are connected to the same pull rope seat, and the other end is respectively connected to the outer end of the first push rod 2 on the left and right sides. The outer end of the first push rod 2 is provided with a pull ring for connecting the first pull rope 3. It can be understood that the pull ring can also be replaced by other connecting parts that can connect pull ropes.

[0043] The first support rod 2 in this embodiment can be designed as a truss structure, a rod structure or a plate structure, etc. In this embodiment, it is preferably designed as a truss structure, which is light in weight and has a strong load-bearing structure.

[0044] In addition to the first pull ropes connected between the first stopper and the blade, this embodiment also includes second pull ropes 4 connected between the first stopper 2 and the extended leaf truss 12. One end of the second pull rope 4 is connected to a pull ring on the outer end of the first stopper, and the other end is connected to a position where the leaf truss extends along the blade body. The two second pull ropes 4 form a quadrilateral with the two first pull ropes 3 connected to the same rope holder.

[0045] Example 2

[0046] As shown in FIG3 , the difference from embodiment 1 is that, or on the basis of embodiment 1, it further includes a second push rod 5 , and there are two second push rods extending outward along the front and rear sides of the blade 1 .

[0047] In this embodiment, the second push rod 5 extends vertically along the blade. The two second push rods 5 can be extended symmetrically or staggered; the lengths of the two second push rods can be the same or different. This embodiment is preferably designed with two second push rods of different lengths, of which the shorter one extends along the back of the blade to prevent the push rod from touching the tower during the rotation of the blade. The short second push rod (hereinafter referred to as the short push rod 51) is connected to the blade truss 12, and the long second push rod (hereinafter referred to as the long push rod 52) is connected to the blade root frame 13 described in Example 1, and the two form a staggered arrangement. The second push rod 5 can also be a truss structure, a rod structure or a plate structure, etc., and this embodiment is preferably a truss structure.

[0048] In this embodiment, a third pull rope 6 is provided between the second stop rod 5 and the blade. One end of the third pull rope 6 is connected to the outer pull ring of the second stop rod 5, and the other end is connected to the blade body or the blade truss via a pull rope seat. Multiple third pull ropes 6 are provided, connected to different positions on the blade.

[0049] In addition to connecting a pull rope between the second push rod and the blade, this embodiment also connects a pull rope (hereinafter referred to as the fourth pull rope 7) between the second push rod 5 and the extended leaf truss 12. For example, a long pull rope is connected between the short push rod 51 and the leaf truss 12 near the blade body 11, and another short pull rope is connected between the long push rod 52 and the leaf truss 12 away from the blade body 11. On this basis, another pull rope is connected between the long pull rope and the leaf truss.

[0050] This embodiment can maximize the supporting effect of the second support rod by arranging the second support rod vertically, making the third pull rope 6 and the fourth pull rope 7 more stable; the long support rod 52 is located in front of the wind wheel, which is of great help in resisting the front wind; the short support rod 51 is located on the back of the wind wheel, which is of great help in resisting the reverse wind; and the second support rod is combined with the aforementioned first support rod 2 to form a most stable structure supported on four sides, thereby being able to resist wind blowing from all wind directions.

[0051] Example 3

[0052] As shown in Figure 1: On the basis of Example 1, a fifth pull rope 8 is further provided between the blade root frame 13 and the second pull rope 4. For example, connection points for connecting the fifth pull rope 8 are provided at 1 / 3 and 2 / 3 of the blade root frame. The two fifth pull ropes 8 are cross-connected between the blade root frame 13 and the second pull rope 4 to further improve stability.

[0053] Example 4

[0054] As shown in Figure 4: The difference from Example 2 is that the connection position of the third pull rope 6 at the short push rod 51 is different from that of Example 2. Specifically, a rear short push rod 53 is extended from the back of the blade, and the rear short push rod 53 is inclined in the direction away from the short push rod 51. At least three third pull ropes 6 are arranged between the short push rod 51, the rear short push rod 53 and the blade, one end of one pull rope is connected to the outer end of the short push rod 51, and the other end is connected to the position where the rear short push rod 53 is connected to the blade 1; one end of the second pull rope is connected to the outer end of the short push rod 51, and the other end is connected to the outer end of the rear short push rod 53; the third pull rope is connected to the outer end of the rear short push rod 53 and the position of the blade 1 away from the root of the blade. A quadrilateral structure is formed between the three pull ropes and the horizontal plane of the blade.

[0055] By adding a rear short push rod 53, this embodiment can reduce the length of the third pull rope 6 and the angle between the third pull rope 6 and the blade, thereby improving the stability of the third pull rope 6 itself and maximizing the tension. Preferably, the closer the angle is to 45°, the better the effect; and by adding the rear short push rod 53, the fatigue of the entire blade root can be reduced, and the resistance to reverse wind can be better.

[0056] Example 5

[0057] As shown in Figure 5: The difference from Example 2 is that at least one third pull rope 6 is provided between the short push rod 51 and the blade 1, connected between the outer end of the short push rod 51 and the blade 1; the inner cavity of the leaf truss 12 inside the blade is also provided with at least one inner pull rope 9, one end of the inner pull rope 9 is connected to the lower part of the leaf truss 12 (i.e., the back direction of the blade), and close to the connection point of the third pull rope 6 connected to the blade, and the other end is connected to the upper part of the leaf truss 12 (i.e., the front direction of the blade).

[0058] In this embodiment, the tension of the third pull rope 6 can be transferred to the inside of the blade through the inner pull rope 9, and the internal structure of the blade can ensure better performance when the wind blows in the opposite direction. It can be said that combining the inner pull rope 9 with the outer pull rope can more effectively transfer the tension of the outer pull rope to the internal structure of the blade, and the inner pull rope can also improve the structural stiffness of the blade.

[0059] It is understandable that the inner pull rope 9 may be located in each section of the blade, or may be provided in a certain section or several sections.

[0060] Example 6

[0061] As shown in Figures 6 and 7 , the difference from Example 2 is that the connection position of the third pull rope 6 at the long reach rod 52 is different from that in Example 2. Specifically, a front short reach rod 54 extends vertically from a certain position at the root of the blade on the front side of the blade, and the length of the front short reach rod 54 is shorter than that of the long reach rod 52. At least four third pull ropes 6 are arranged between the long push rod 52, the front short push rod 54 and the blade 1. The first pull rope is arranged between the outer end of the long push rod 52 and the blade 1, and the connection point between the first pull rope and the blade is located between the front short push rod 54 and the long push rod 52; one end of the second pull rope is connected to the blade and is located at the connection point between the front short push rod 54 and the long push rod 52, and the other end is connected to the outer end of the front short push rod 54; the third pull rope is connected to the outer end of the front short push rod 54 and the position of the blade away from the root of the blade; the fourth pull rope is connected to the end of the second pull rope and the third pull rope away from the front short push rod 54, so that the second pull rope, the third pull rope and the fourth pull rope form a stable triangular structure.

[0062] By adding a front short push rod 54, this embodiment can reduce the length of the third pull rope 6 and the angle between the third pull rope 6 and the blade, thereby improving the stability of the third pull rope 6 itself and maximizing the tension. Preferably, the closer the angle is to 45°, the better the effect; and by adding a front short push rod 54, the fatigue of the entire blade root can be reduced, and the resistance to positive wind can be better.

[0063] In this embodiment, the inner cavity of the blade truss 12 is further provided with at least two inner tension ropes 9. These two inner tension ropes 9 are arranged in a cross pattern and are located in the inner cavity of the blade truss 12 at the position corresponding to the second tension rope. In this embodiment, by combining the inner tension ropes 9 with the outer tension ropes, the tension of the outer tension ropes is more effectively transmitted to the internal structure of the blade. The inner tension ropes also increase the structural rigidity of the blade, and the cross pattern further increases the structural rigidity, which is even better in both forward and reverse winds.

[0064] In this embodiment, at least one third pull rope 6 is provided between the short push rod 51 and the blade 1, one end of which is connected to the outer end of the short push rod 51, and the other end is connected to the blade 1, and is located at a position symmetrical to the connection point of the aforementioned first pull rope.

[0065] Example 7

[0066] As shown in Figure 8: The difference from Example 1 is that the connection position of the first pull rope 3 is different from that of Example 1. Specifically: two extended left short push rods 21 and right short push rods 22 are provided in the lower middle part or the middle part of the blade 1. The left short push rod 21 and the right short push rod 22 are symmetrically connected to the leaf truss 12 of the inner cavity of the blade, and pass through along the blade body 11 and are tilted. The tilt angle can be the same as or different from that of the first push rod 2, and the lengths of the left and right short push rods can be the same or different. At least three first pull ropes 3 are provided between the first push rod 2 and the left short push rod 21 on the left and the blade 1; symmetrically, at least three first pull ropes 3 are also provided between the first push rod 2 and the right short push rod 22 on the right and the blade 1, thereby forming a symmetrical structure.

[0067] This embodiment is illustrated by the arrangement structure of the first pull rope 3 between the left short push rod 21, the left first push rod 2 and the blade 1: one end of the first pull rope is connected to the outer end of the first push rod 2, and the other end passes through the inner cavity of the leaf truss 12 along the blade body, and is connected to the leaf truss 12, and the connection point is set between the left short push rod 21 and the right short push rod 22; one end of the second pull rope is connected to the outer end of the left short push rod 21, and the other end passes through the blade body and is connected to the leaf truss 12, and the connection point is set close to the blade root; one end of the third pull rope is connected to the outer end of the left short push rod 21, and the other end passes through the blade body and is connected to the leaf truss 12, and the connection point is set away from the blade root. Similarly, the pull rope structure on the right forms a symmetrical structure with the pull rope on the left, which will not be described in detail here.

[0068] In this embodiment, the four pull ropes connected to the left and right short push rods and blades form a small quadrilateral structure; the two pull ropes between the first push rod 2 and the blade 1 and the two pull ropes between the first push rod 2 and the extended leaf truss 12 also form a large quadrilateral structure, and the overlapping part between the small quadrilateral and the large quadrilateral is also a quadrilateral structure.

[0069] This embodiment provides a left short push rod 21 and a right short push rod 22 to reduce the length of the pull rope, ensure the stability of the pull rope itself during rotation, and provide an optimal pull rope angle to maximize the pull rope effect.

[0070] Example 8

[0071] As shown in Figure 9, the difference from Example 2 is that at least one third tie rope 6 is provided between the long lever 52 and the blade 1, and at least one third tie rope 6 is also provided between the short lever 51 and the blade 1. The connection points of the two tie ropes with the blade 1 are symmetrically arranged. In addition, two inner tie ropes 9 are intersectingly provided inside the leaf truss 12, with one end of the inner tie rope 9 positioned near the connection point between the third tie rope 6 and the blade 1.

[0072] The force of the third pull rope 6 can be transferred to the inside of the blade through the inner pull rope 9, and the inner structure of the blade is used to ensure better performance when the wind is blowing in the positive and negative directions.

[0073] It is understood that the two cross-arranged inner pull ropes 9 can be provided in each section of the blade, or in some sections of the blade. For example, as shown in FIG10 , a cross-arranged inner pull rope 9 is provided in each section of the blade, which can ensure the overall rigidity of the blade structure, resisting positive and negative winds by relying on its own rigidity, while also improving the stability of the third pull rope 6.

[0074] Example 9

[0075] As shown in Figure 11, the difference from Example 1 is that at least three first pull ropes 3 are provided between the two first push rods 2 and the blade 1. Two of these pull ropes have one end connected to the outer ends of the corresponding two first push rods 2, and the other end passes through the blade body and is connected to the leaf truss 12. Both pull ropes are connected to the same position on the leaf truss 12, for example, the connection point is located on the left side of the leaf truss 12. A third pull rope is also connected between the two pull ropes.

[0076] Two inner pull ropes 9 are arranged crosswise in the leaf truss 12 , and one end of the inner pull rope 9 is arranged near the connection point between the first pull rope 3 and the leaf truss.

[0077] Example 10

[0078] The difference from Example 8 is that a crossed inner pull rope 9 is provided in every 2 to 4 adjacent sections of the blade. For example, as shown in FIG12 , two crossed inner pull ropes are provided in every two adjacent sections of the blade.

[0079] Example 11

[0080] As shown in Figures 13 and 14: The wind turbine impeller of this embodiment is provided with multiple blades 1, such as three, and connecting frames 10 are provided between adjacent blades 1. The connecting frames are also preferably designed as truss structures. The connecting frames 10 are connected to the leaf trusses 12 of adjacent blades, specifically to the portion of the trusses of the leaf trusses 12 extending along the blade body 11. Each connecting frame 10 forms an annular structure, referred to as a large annular frame in this embodiment. For example, three connecting frames 10 are provided correspondingly for three blades 1, forming a triangular structure, preferably an equilateral triangle structure. It is understandable that the present invention can also provide connecting frames 10 between the blades 1 near the hub position to form an annular structure, referred to as a small annular frame in this embodiment. By providing a large annular frame and a small annular frame, this embodiment can solve the fatigue problem of the blades when the wind rotor rotates, while improving the stability of the wind rotor rotation.

[0081] A sixth pull rope 101 is provided between the connecting frame 10 and the leaf truss 12. For example, a pull rope seat connected to the sixth pull rope 101 is provided in the middle of the connecting frame 10. Four sixth pull ropes 101 are connected to the middle of a connecting frame 10, wherein the other end of the first pull rope is connected to the leaf truss extending from the first blade, and the connection point is arranged close to the root of the first blade; the other end of the second pull rope is connected to the leaf truss extending from the first blade, and the connection point is arranged away from the root of the first blade, that is, the length of the second pull rope is smaller than that of the first pull rope; similarly, the other end of the third pull rope is connected to the leaf truss extending from the second blade, and is symmetrically arranged with the first pull rope; the other end of the fourth pull rope is connected to the leaf truss extending from the second blade, and is symmetrically arranged with the second pull rope.

[0082] Similarly, the pull ropes on other connecting frames are also connected to the leaf trusses of adjacent blades as described above.

[0083] In this embodiment, a ring link 15 is further provided near the hub, that is, a plurality of links are connected between adjacent blades to form an annular structure. A seventh drawstring 151 is provided between each link of the ring link 15 and the corresponding connecting frame 10. For example, each link of the ring link 15 is connected to the corresponding connecting frame 10 on the small ring frame and the large ring frame at the same time using the seventh drawstring 151. By providing the ring link 15, this embodiment can improve the strength and rigidity of the blade root, improve the force transmission effect, and effectively reduce the fatigue of the root flange connection position. In addition, the ring link 15 is connected to the connecting frame 10 through the seventh drawstring 151, which can reduce the stability and fatigue problems of the connecting frame 10 itself, so that the connecting frame 10 forms a complete overall structure and improves its own rigidity.

[0084] It can be understood that the pull rope described above in the present invention is connected to the blade, which can be connected to the blade truss or the blade body.

[0085] It should be understood that the term "connection" in the present invention should be interpreted broadly. For example, it can include fixed connection, detachable connection, or integral connection; it can include direct connection, indirect connection through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in the present invention in specific circumstances.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0087] The directions or positional relationships indicated by terms such as "center", "length", "up", "down", "front", "back", "left", and "right" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

Claims

1. A blade with a pull rope, comprising a stop rod and a pull rope; characterized in that: The stopper rod extends outwards along the left and right sides and / or the front and rear sides of the blade.

2. The blade with a pull rope according to claim 1, characterized in that: The support rod includes a first support rod and / or a second support rod, wherein the first support rod extends vertically or obliquely along the left and right sides of the blade; and the second support rod extends vertically or obliquely along the front and rear sides of the blade.

3. The blade with a pull rope according to claim 2, characterized in that: The first push rod is arranged obliquely and is arranged on a tangent of a circle formed by taking the hub as the center and the length between the first push rod and the center as the radius; or the second push rod is arranged vertically along the blade.

4. The blade with a pull rope according to claim 2, characterized in that: A first pull rope is arranged between the first push rod and the blade; a third pull rope is arranged between the second push rod and the blade.

5. The blade with a pull rope according to claim 2, characterized in that: The blade includes a blade body and a blade truss, the blade truss is arranged in the blade body and extends along the blade body, the support rod is arranged on the extended leaf truss and is arranged close to the root of the blade body; a second pull rope is arranged between the first support rod and the leaf truss extending along the blade root direction; a fourth pull rope is arranged between the second support rod and the leaf truss extending along the blade root direction.

6. The blade with a pull rope according to claim 1, characterized in that: At least one inner pull rope is arranged in the blade.

7. The blade with a pull rope according to claim 2, characterized in that: A short push rod is further extended from at least one of the front and rear sides of the blade, and an external pull rope is provided between the short push rod and the blade and / or between the short push rod and the second push rod; The short abutment rod is arranged obliquely or vertically with the blade.

8. The blade with a pull rope according to claim 2, characterized in that: A left short push rod and a right short push rod are symmetrically extended from the left and right sides of the blade, and an external pull rope is arranged between the two short push rods and the blade and / or between the two short push rods and the first push rod.

9. The blade with a pull rope according to claim 1, characterized in that: A plurality of blades are connected to the hub, a connecting frame is arranged between adjacent blades to form a ring frame structure, and an external pull rope is arranged between the connecting frame and the blade truss of the blade.

10. The blade with a pull rope according to claim 9, characterized in that: A ring connecting rod is also provided near the hub, that is, a plurality of connecting rods are connected between adjacent blades to form a ring structure; an external pull rope is provided between each connecting rod of the ring connecting rod and the corresponding connecting frame.

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