A blade with a pull cord

Abstract

A blade with a pull rope comprises a stopper and a pull rope; the stopper extends outward along the left and right sides and / or the front and back sides of the blade, and the pull rope is arranged between the stopper and the blade. The first stopper is arranged along the left and right sides of the blade, and the outer pull rope is connected between the first stopper and the blade, so that the annular swing of the blade can be reduced when the blade rotates in a ring shape, the stable operation is ensured, and the fatigue of the root of the blade is reduced. The second stopper is arranged along the front and back sides of the blade, and the outer pull rope is connected between the second stopper and the blade, so that the wind from the front and back sides can be effectively resisted. Through the combination of the first stopper and the second stopper, a most stable structure of four-side support can be formed, so that the wind from various directions can be resisted, and the stability effect is remarkable.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a blade with a pull rope. Background Technology

[0002] Wind turbines mainly consist of a tower, generator, hub, and rotor, with the rotor comprising multiple blades. At high wind speeds, especially in strong winds or typhoons, insufficient blade stiffness can easily lead to torsional forces. Furthermore, high rotor speeds can easily generate centrifugal force, potentially causing the blades to be thrown off, posing safety hazards. Existing improvements involve installing tension ropes between the blades and the hub, or between adjacent blades, to address blade fatigue and stability issues. However, these methods do not reduce blade oscillation, resulting in poor stability and difficulty in resolving root fatigue issues. Additionally, they offer limited resistance to both frontal and rearal winds.

[0003] Furthermore, when the blades are connected to the hub via the blade truss, the overall stability cannot be guaranteed when the wind turbine rotates due to the long length of the truss. In addition, the root stiffness of the truss is weak, which can lead to fatigue at the connection between the root and the hub. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a blade with a tie rope that has high stability, fatigue resistance, strong wind resistance, and high truss stiffness.

[0005] The technical solution of the present invention is: a blade with a pull rope, comprising a stop rod and a pull rope; the stop rod extends outward along the left and right sides and / or the front and rear sides of the blade, and the pull rope is provided between the stop rod and the blade.

[0006] Furthermore, the abutment includes a first abutment and / or a second abutment, wherein the first abutment extends vertically or obliquely along the left and right sides of the blade; and the second abutment extends vertically or obliquely along the front and rear sides of the blade.

[0007] Furthermore, the first abutment is inclined and located on the tangent of a circle formed by the hub as the center and the length between the first abutment and the center as the radius; or the second abutment is vertically arranged along the blade.

[0008] Furthermore, a first pull rope is provided between the first abutment and the blade; a third pull rope is provided between the second abutment and the blade.

[0009] Furthermore, the blade includes a blade body and a blade truss. The blade truss is disposed within the blade body and extends along the blade body. The abutment is disposed on the extended blade truss and is located near the root of the blade body. A second pull rope is provided between the first abutment and the extended blade truss. A fourth pull rope is provided between the second abutment and the extended blade truss.

[0010] Furthermore, the blade is provided with at least one internal pull rope.

[0011] Furthermore, at least one of the front and rear sides of the blade extends a short abutment rod, and an external pull rope is provided between the short abutment rod and the blade and / or between the short abutment rod and the second abutment rod; the short abutment rod is inclined or perpendicular to the blade.

[0012] Furthermore, a left short abutment rod and a right short abutment rod are symmetrically arranged on the left and right sides of the blade, and an external pull rope is provided between the two short abutment rods and the blade and / or between the two short abutment rods and the first abutment rod.

[0013] 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 frames and the blade truss.

[0014] Furthermore, a ring connecting rod is provided near the hub, that is, multiple connecting rods are connected between adjacent blades to form a ring structure; each connecting rod of the ring connecting rod is provided with an external pull rope between it and the corresponding connecting frame.

[0015] The beneficial effects of this invention are: (1) By setting the first abutment along the left and right sides of the blade and connecting the first abutment with the blade with an external pull rope, the circumferential swing of the blade can be reduced when the blade rotates in the circumferential direction, ensuring stable operation and reducing fatigue at the root of the blade; by setting the second abutment along the front and rear sides of the blade and connecting the second abutment with the blade with an external pull rope, the front and rear winds can be effectively resisted; and by combining the first abutment with the second abutment, a most stable structure with four-sided support can be formed, thereby resisting winds from all directions and achieving significant stabilization.

[0016] (2) By tilting the first abutment, wind resistance can be reduced when the blades rotate, and the tilting direction is the tangent of the wind turbine rotation circle, so the resistance is minimal; by setting the second abutment vertically, the supporting role of the second abutment can be maximized, making the front and rear pull ropes more stable and more effective in resisting winds from both sides.

[0017] (3) By combining the outer and inner pull ropes, the tension of the outer pull ropes can be transferred to the internal structure of the blade more effectively, and the inner pull ropes can also improve the structural stiffness of the blade and resist winds from both sides more effectively.

[0018] (4) By setting short abutments on the front and back 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 further reducing the fatigue of the entire blade root.

[0019] (5) By setting up large ring frame and small ring frame, the fatigue problem during wind turbine rotation can be solved, and the stability of wind turbine can be improved at the same time. By setting up ring connecting rod, the root strength and stiffness can be improved, the force transmission effect is better, the fatigue at the root flange connection position can be effectively reduced, and the ring connecting rod is connected to the large ring frame and small ring frame through the pull rope, which can effectively reduce the stability and fatigue problem of the large ring frame and small ring frame and improve their own stiffness. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 yes Figure 1 An enlarged schematic diagram of Part I of Embodiment 1 is shown; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present invention; Figure 6 This is a schematic diagram of the structure of Embodiment 6 of the present invention; Figure 7 yes Figure 6 A partial enlarged structural diagram of Embodiment 6 is shown; Figure 8 This is a schematic diagram of the structure of Embodiment 7 of the present invention; Figure 9 This is a schematic diagram of the structure of Embodiment 8 of the present invention; Figure 10 This is another structural schematic diagram of Embodiment 8 of the present invention; Figure 11 This is a schematic diagram of the structure of Embodiment 9 of the present invention; Figure 12 This is a schematic diagram of the structure of Embodiment 10 of the present invention; Figure 13 This is a side view of the wind turbine generator set of Embodiment 10 of the present invention; Figure 14 This is a front structural diagram of the wind turbine of Embodiment 10 of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Blade; 2. First stop rod; 3. First pull rope; 4. Second pull rope; 5. Second stop 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 stop rod; 22. Right short stop rod; 51. Short stop rod; 52. Long stop rod; 53. Rear short stop rod; 54. Front short stop rod; 101. Sixth pull rope; 151. Seventh pull rope. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 like Figure 1 and Figure 2 As shown: A blade with a pull rope includes a first abutment 2 and a first pull rope 3; there are two first abutment rods 2, which extend outward along the left and right sides of the blade 1.

[0024] Specifically, in this embodiment, the blade 1 includes a blade body 11 and a blade stringer 12. The blade stringer 12 is located within the blade body 11 and extends along the blade body. A first abutment 2 is connected to the extended blade stringer 12 and is positioned near the blade root of the blade body. That is, a blade root support 13 is provided at the blade root of the blade body, and a diagonal brace 14 is provided between the blade root support 13 and the blade stringer 12. The first abutment 2 is connected to the blade root support 13 and extends symmetrically to the left and right sides along the blade root support 13, with the inclination direction set on the tangent of the circle formed by the hub as the center and the length between the first abutment and the center as the radius. In this embodiment, by setting the first abutment, the circumferential oscillation of the blade can be reduced during circumferential rotation, ensuring stable operation and reducing root fatigue. The reason for the inclination of the first abutment in this embodiment is that when the wind turbine blades rotate, wind resistance needs to be minimized, and this inclination direction is the tangent of the wind turbine's rotation circle, where resistance is minimized.

[0025] In this embodiment, the first abutment 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.

[0026] In this embodiment, the first pull rope 3 is located between the first abutment rod 2 and the blade 1. There are several first pull ropes; one end of each pull rope 3 is connected to the outer end of the first abutment rod 2, and the other end is connected to the blade body or blade truss via a pull rope seat. Pull ropes can be connected to both the back and front of the blade, or only to one side. Different pull rope seats are located at different positions on the blade, and can be arranged at equal or unequal intervals. Every two first pull ropes 3 are connected to the same pull rope seat, forming a triangular structure with the left and right abutment rods 2. For example, this embodiment uses six first pull ropes, with pull rope seats located on one side of the blade off-center, and three pull rope seats arranged at equal intervals. Every two pull ropes are connected to the same pull rope seat, and the other end is connected to the outer end of the left and right abutment rods 2 respectively. The outer end of the first abutment rod 2 is provided with a pull ring for connecting the first pull rope 3. It is understood that the pull ring can also be replaced by other connectors that can connect pull ropes.

[0027] In this embodiment, the first abutment 2 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 lightweight and has a strong load-bearing structure.

[0028] In addition to the first pull rope connecting the first abutment 2 and the blade, this embodiment also includes a second pull rope 4, connecting the first abutment 2 and the extended blade truss 12. One end of the second pull rope 4 is connected to a pull ring at the outer end of the first abutment, and the other end is connected to a position on the blade truss extending along the blade body. The two second pull ropes 4 and the two first pull ropes 3 connected to the same pull rope seat form a quadrilateral.

[0029] Example 2 like Figure 3 As shown: The difference from Embodiment 1 is that, or based on Embodiment 1, it also includes a second abutment 5, which consists of two rods that extend outward along the front and rear sides of the blade 1.

[0030] In this embodiment, the second abutment 5 extends vertically along the blade. The two second abutment 5s can extend symmetrically or in a staggered manner; the lengths of the two second abutment 5s can be the same or different. Preferably, this embodiment designs two second abutment 5s of different lengths, with the shorter one extending along the back of the blade to prevent it from touching the tower during blade rotation. The shorter second abutment 51 (hereinafter referred to as the short abutment 51) is connected to the blade truss 12, and the longer second abutment 52 (hereinafter referred to as the long abutment 52) ​​is connected to the blade root frame 13 described in Embodiment 1, forming a staggered arrangement. The second abutment 5 is also a truss structure.

[0031] In this embodiment, a third pull rope 6 is provided between the second abutment rod 5 and the blade. One end of the third pull rope 6 is connected to the outer end pull ring of the second abutment rod 5, and the other end is connected to the blade body or blade strut via a pull rope seat. Multiple third pull ropes 6 are provided and connected to different positions on the blade.

[0032] In addition to connecting the pull rope between the second abutment and the blade, this embodiment also connects a pull rope (hereinafter referred to as the fourth pull rope 7) between the second abutment 5 and the extended blade truss 12. For example, a long pull rope is connected to the short abutment 51 and the blade truss 12 near the blade body 11, and another short pull rope is connected to the long abutment 52 and the blade truss 12 away from the blade body 11. Furthermore, another pull rope is connected between the long pull rope and the blade truss.

[0033] In this embodiment, the vertical setting of the second abutment maximizes its supporting function, making the third pull rope 6 and the fourth pull rope 7 more stable. The long abutment 52 is located on the front of the wind turbine, which greatly helps to resist frontal winds. The short abutment 51 is located on the back of the wind turbine, which greatly helps to resist back winds. Furthermore, by combining the second abutment with the aforementioned first abutment 2, a most stable structure with four-sided support can be formed, thereby resisting winds blowing from all directions.

[0034] Example 3 like Figure 1 As shown: Based on embodiment 1, a fifth pull rope 8 is also provided between the leaf root frame 13 and the second pull rope 4. For example, there are connection points for connecting the fifth pull rope 8 at 1 / 3 and 2 / 3 of the leaf root frame. The two fifth pull ropes 8 are cross-connected between the leaf root frame 13 and the second pull rope 4 to further improve stability.

[0035] Example 4 like Figure 4 As shown: The difference from Embodiment 2 is that the connection position of the third pull rope 6 at the short abutment rod 51 is different from that in Embodiment 2. Specifically: a rear short abutment rod 53 extends from the back of the blade, and the rear short abutment rod 53 is inclined away from the short abutment rod 51. At least three third pull ropes 6 are provided between the short abutment rod 51, the rear short abutment rod 53 and the blade. One end of the pull rope is connected to the outer end of the short abutment rod 51, and the other end is connected to the position where the rear short abutment rod 53 is connected to the blade 1; one end of the second pull rope is connected to the outer end of the short abutment rod 51, and the other end is connected to the outer end of the rear short abutment rod 53; the third pull rope is connected to the outer end of the rear short abutment rod 53 at a position away from the blade root of the blade 1. The three pull ropes form a quadrilateral structure with the horizontal plane of the blade.

[0036] This embodiment, by adding a rear short stop bar 53, 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. The closer the angle is to 45°, the better the effect. Moreover, by adding a rear short stop bar 53, the fatigue of the entire blade root can be reduced, and the resistance to reverse wind can be better.

[0037] Example 5 like Figure 5 As shown: The difference from Embodiment 2 is that at least one third pull rope 6 is provided between the short abutment rod 51 and the blade 1, connecting the outer end of the short abutment rod 51 and the blade 1; the inner cavity of the blade 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 blade truss 12 (i.e. the back side 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 blade truss 12 (i.e. the front side of the blade).

[0038] In this embodiment, the inner pull rope 9 can transfer the tension of the third pull rope 6 to the inside of the blade, and the internal structure of the blade ensures better performance when the wind is blowing in the opposite direction. It can be said that by combining the inner pull rope 9 with the outer pull rope, the tension of the outer pull rope can be transferred to the internal structure of the blade more effectively, and the inner pull rope can also improve the structural rigidity of the blade.

[0039] It is understandable that the inner pull rope 9 can be located in each section of the blade, or it can be set in one or several sections.

[0040] Example 6 like Figure 6 and Figure 7 As shown: The difference from Embodiment 2 is that the connection position of the third pull rope 6 at the long abutment rod 52 is different from that in Embodiment 2. Specifically, a short front abutment rod 54 extends vertically from the front of the blade at a certain position at the root of the blade, and the length of the short front abutment rod 54 is less than the length of the long abutment rod 52. At least four third pull ropes 6 are provided between the long abutment rod 52, the front short abutment rod 54 and the blade 1. The first pull rope is located between the outer end of the long abutment rod 52 and the blade 1, and the connection point of the first pull rope and the blade is located between the front short abutment rod 54 and the long abutment 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 abutment rod 54 and the long abutment rod 52, and the other end is connected to the outer end of the front short abutment rod 54. The third pull rope is connected to the outer end of the front short abutment rod 54 and the blade at a position away from the blade root. The fourth pull rope is connected to the ends of the second and third pull ropes that are away from the front short abutment rod 54, so that the second, third and fourth pull ropes form a stable triangular structure.

[0041] This embodiment, by adding a short front stop bar 54, 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. The closer the angle is to 45°, the better the effect. Moreover, by adding a short front stop bar 54, the fatigue of the entire blade root can be reduced, and the resistance to frontal winds can be better.

[0042] In this embodiment, the inner cavity of the blade truss 12 is also provided with at least two inner tension ropes 9. The two inner tension ropes 9 are arranged in a crisscross pattern, and are located in the inner cavity of the blade truss 12 section at the position corresponding to the aforementioned second tension rope. This embodiment, by combining the inner tension ropes 9 with the outer tension ropes, enables the tension of the outer tension ropes to be more effectively transmitted to the internal structure of the blade. Moreover, the inner tension ropes can also improve the structural stiffness of the blade, and the crisscrossing further improves the structural stiffness, which is better when facing both forward and reverse winds.

[0043] In this embodiment, at least one third pull rope 6 is provided between the short abutment rod 51 and the blade 1. One end of the rope is connected to the outer end of the short abutment rod 51, and the other end is connected to the blade 1 at a position symmetrical to the connection point of the aforementioned first pull rope.

[0044] Example 7 like Figure 8 As shown: The difference from Embodiment 1 is that the connection position of the first pull rope 3 is different from that in Embodiment 1. Specifically: Two extending left short abutment rods 21 and right short abutment rods 22 are provided in the lower middle or middle part of the blade 1. The left short abutment rods 21 and right short abutment rods 22 are symmetrically connected to the blade truss 12 in the blade cavity, and pass through the blade body 11, and are inclined. The inclination angle can be the same as or different from that of the first abutment rod 2, and the lengths of the left and right short abutment rods can be the same as or different. At least three first pull ropes 3 are provided between the left first abutment rod 2, the left short abutment rod 21 and the blade 1; symmetrically, at least three first pull ropes 3 are also provided between the right first abutment rod 2, the right short abutment rod 22 and the blade 1, thus forming a symmetrical structure.

[0045] This embodiment illustrates the arrangement of the first pull rope 3 between the left short abutment rod 21, the left first abutment rod 2, and the blade 1: One end of the first pull rope is connected to the outer end of the first abutment rod 2, and the other end passes through the blade body into the inner cavity of the blade truss 12, connecting with the blade truss 12, with the connection point located between the left short abutment rod 21 and the right short abutment rod 22; one end of the second pull rope is connected to the outer end of the left short abutment rod 21, and the other end passes through the blade body and connects with the blade truss 12, with the connection point located near the blade root; one end of the third pull rope is connected to the outer end of the left short abutment rod 21, and the other end passes through the blade body and connects with the blade truss 12, with the connection point located away from the blade root. Similarly, the pull rope structure on the right side forms a symmetrical structure with the pull rope on the left side, which will not be described in detail here.

[0046] In this embodiment, the four ropes connected to the left and right short abutments and the blades form a small quadrilateral structure; the two ropes between the first abutment 2 and the blade 1 and the two ropes between the first abutment 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.

[0047] This embodiment reduces the length of the pull rope by setting a left short stop 21 and a right short stop 22, ensuring the stability of the pull rope during rotation, and providing the optimal pull rope angle to maximize the pull rope effect.

[0048] Example 8 For example Figure 9 As shown: The difference from Embodiment 2 is that at least one third pull rope 6 is provided between the long support rod 52 and the blade 1, and at least one third pull rope 6 is also provided between the short support rod 51 and the blade 1, with the connection points of the two to the blade 1 symmetrically arranged. In addition, two inner pull ropes 9 are also intersecting inside the blade truss 12, and one end of the inner pull rope 9 is located near the connection point of the third pull rope 6 and the blade 1.

[0049] The force of the third pull rope 6 can be transmitted to the blade through the inner pull rope 9, and the internal structure of the blade ensures better performance when blowing in both directions.

[0050] Understandably, the two intersecting inner pull ropes 9 can be installed within each segment of the blade, or within some segments of the blade. For example... Figure 10 As shown, each section of the blade is equipped with intersecting inner tension ropes 9, which can ensure the overall rigidity of the blade structure and resist both frontal and rearal winds by relying on its own rigidity, while also improving the stability of the third tension rope 6.

[0051] Example 9 like Figure 11 As shown: The difference from Embodiment 1 is that at least three first pull ropes 3 are provided between the two first abutment rods 2 and the blade 1. Two of the pull ropes have one end connected to the outer end of the corresponding two first abutment rods 2, and the other end passes through the blade body and connects to the blade truss 12. Both pull ropes are connected at the same position on the blade truss 12, for example, at the left side of the blade truss 12. A third pull rope is also connected between the two pull ropes.

[0052] The blade truss 12 is also provided with two intersecting inner pull ropes 9, with one end of the inner pull rope 9 located near the connection point between the first pull rope 3 and the blade truss.

[0053] Example 10 The difference from Example 8 is that each adjacent 2-4 segments of the blade is provided with intersecting inner pull ropes 9, for example... Figure 12 As shown, two intersecting inner pull ropes are installed in each adjacent two segments of the blade.

[0054] Example 11 like Figure 13 and 14 As shown: The wind turbine rotor of this embodiment has multiple blades 1, such as three blades. A connecting frame 10 is provided between adjacent blades 1, preferably designed as a truss structure. The connecting frame 10 is connected to the blade truss 12 of the adjacent blades, specifically to the portion of the truss 12 extending along the blade body 11. Each connecting frame 10 forms a ring structure, referred to as a large ring frame in this embodiment. For example, three connecting frames 10 are provided for three blades 1, forming a triangular structure, preferably an equilateral triangle structure. It can be understood that the present invention can also provide connecting frames 10 between the blades 1 near the hub, forming a ring structure, referred to as a small ring frame in this embodiment. This embodiment, by setting large and small ring frames, can solve the blade fatigue problem during wind turbine rotation and improve the stability of wind turbine rotation.

[0055] A sixth pull rope 101 is provided between the connecting frame 10 and the blade truss 12. For example, the middle part of the connecting frame 10 is provided with a pull rope seat connected to the sixth pull rope 101. Four sixth pull ropes 101 are connected to the middle part of one connecting frame 10. The other end of the first pull rope is connected to the blade truss extending from the first blade, and the connection point is set close to the root of the first blade. The other end of the second pull rope is connected to the blade truss extending from the first blade, and the connection point is set away from the root of the first blade. That is, the length of the second pull rope is less than that of the first pull rope. Similarly, the other end of the third pull rope is connected to the blade 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 blade truss extending from the second blade and is symmetrically arranged with the second pull rope.

[0056] Similarly, the ropes on other connecting frames are connected to the blade truss of adjacent blades in the same way as described above.

[0057] In this embodiment, a ring connecting rod 15 is also provided near the hub, that is, multiple connecting rods are connected between adjacent blades to form a ring structure. Each connecting rod of the ring connecting rod 15 is connected to the corresponding connecting frame 10 by a seventh rope 151. For example, each connecting rod of the ring connecting rod 15 is connected to the corresponding connecting frame 10 on the small ring frame and the large ring frame by the seventh rope 151. By setting the ring connecting rod 15 in this embodiment, the strength and stiffness of the blade root can be improved, the force transmission effect can be better, and the fatigue at the root flange connection position can be effectively reduced. In addition, the ring connecting rod 15 is connected to the connecting frame 10 through the seventh rope 151, which can reduce the stability and fatigue problems of the connecting frame 10 itself, so that the connecting frame 10 forms a complete integral structure and improves its own stiffness.

[0058] It is understood that the connection between the pull rope and the blade described above in this invention can be a connection to the blade truss or a connection to the blade body.

[0059] It is understood that the term "connection" in this invention should be interpreted broadly. For example, it may include a fixed connection, a detachable connection, or an integral connection; it may include a direct connection, an indirect connection through an intermediate medium, or a connection within two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] The terms “center,” “length,” “upper,” “lower,” “front,” “rear,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

Claims

1. A blade with a pull rope, comprising a stop bar and a pull rope, characterized in that: The abutment includes a first abutment and a second abutment. The first abutment extends vertically or obliquely along the left and right sides of the blade, and the second abutment extends vertically or obliquely along the front and rear sides of the blade. The blade includes a blade body and a blade stringer. The blade stringer is disposed within the blade body and extends along the blade body. The abutment is disposed on the extended blade stringer and is located near the root of the blade body. A second tension rope is provided between the first abutment and the extended blade stringer, and a fourth tension rope is provided between the second abutment and the extended blade stringer. A first tension rope is provided between the first abutment and the blade body, and a fourth tension rope is provided between the second abutment and the blade body. There is a third pull rope; at least one inner pull rope is provided inside the blade; at least one of the front and rear sides of the blade also extends a short abutment rod, and an outer pull rope is provided between the short abutment rod and the blade and / or between the short abutment rod and the second abutment rod; the short abutment rod is set at an angle or perpendicular to the blade; multiple blades are connected to the hub, and a connecting frame is provided between adjacent blades to form a ring frame structure; an outer pull rope is provided between the connecting frame and the blade truss; a ring connecting rod is also provided near the hub, that is, multiple connecting rods are connected between adjacent blades to form a ring structure; an outer pull rope is provided between each connecting rod of the ring connecting rod and the corresponding connecting frame.

2. The blade with a pull rope according to claim 1, characterized in that, A left short abutment rod and a right short abutment rod are symmetrically arranged on the left and right sides of the blade. An external pull rope is provided between the left short abutment rod and the blade and / or between the left short abutment rod and the first abutment rod.

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