A single-blade hoist for a wind power generator

Abstract

The application discloses a single-blade hoist of a wind-driven generator, which comprises a main beam, a blade fixing mechanism arranged on the main beam, a vertical lifting beam, a balance beam, a horizontal pivot shaft, a vertical pivot shaft, a horizontal adjusting mechanism and a vertical adjusting mechanism; the vertical lifting beam is in an inverted U-shaped structure, and the main beam passes through the middle of the vertical lifting beam; the balance beam is located below the main beam and above the blade; the balance beam is hingedly connected with the lower end opening of the vertical lifting beam through the horizontal pivot shaft; the left and right ends of the balance beam are hingedly connected with the main beam through the vertical pivot shaft; the horizontal adjusting mechanism is connected between the balance beam and the main beam, and the vertical lifting beam and the balance beam are rotated relative to the main beam around the vertical pivot shaft through the horizontal adjusting mechanism; the vertical adjusting mechanism is connected between the vertical lifting beam and the balance beam, and the vertical lifting beam is rotated relative to the main beam and the balance beam around the horizontal pivot shaft through the vertical adjusting mechanism. The hoist of the application has a small difference between the overall gravity arm of the hoist and the arm of the pitch cylinder when the hoist is pitched, and the requirement for the load bearing capacity of the cylinder is reduced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade hoisting technology, and in particular to a single wind turbine blade hoisting tool. Background Technology

[0002] Commonly used wind turbine blade spreaders with pitch control functionality have their pitch control devices located on the upper surface of the main beam. This design leads to the following problems.

[0003] Firstly, when the blades change pitch, the difference between the overall center of gravity arm of the spreader and the pitch cylinder arm is large, which requires high cylinder load capacity and long stroke, increasing the production cost of the spreader.

[0004] Secondly, this design structure is not compact enough, the overall size of the lifting device is large, and the lifting height requirement of the crane is high during lifting operations, which increases the lifting cost. Summary of the Invention

[0005] In order to solve the problems in the prior art, the present invention provides a single blade lifting tool for wind turbines.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A single blade lifting device for a wind turbine includes a main beam with a blade fixing mechanism on the main beam, and also includes a vertical lifting beam, a balance beam, a transverse pin, a longitudinal pin, a transverse adjustment mechanism, and a longitudinal adjustment mechanism.

[0008] The vertical lifting beam is arranged vertically and has an inverted U-shaped structure. The main beam passes through the middle of the vertical lifting beam in the left-right direction. The upper end of the vertical lifting beam is equipped with a lifting assembly for connecting with the lifting equipment.

[0009] The balance beam is arranged in the left-right direction and located below the main beam and above the blade; the balance beam and the lower end opening of the vertical lifting beam are hinged by a transverse pin, the axis of which is set in the front-back direction; the left and right ends of the balance beam are respectively hinged to the main beam by longitudinal pins, the axis of which is set in the left-right direction.

[0010] The lateral adjustment mechanism is connected between the balance beam and the main beam. The vertical lifting beam and the balance beam rotate relative to the main beam around the longitudinal pin shaft through the lateral adjustment mechanism, thereby realizing blade pitch control.

[0011] The longitudinal adjustment mechanism is connected between the vertical lifting beam and the balance beam. The vertical lifting beam rotates relative to the main beam and the balance beam around the transverse pin shaft through the longitudinal adjustment mechanism, thereby realizing the change of the blade pitch angle.

[0012] Furthermore, the lateral adjustment mechanism includes two lateral adjustment cylinders, which are distributed at the left and right ends on the same side of the balance beam; the two ends of each lateral adjustment cylinder are hinged to the main beam and the balance beam, respectively.

[0013] Furthermore, the left and right ends of the balance beam on the same side are respectively fixed with first connecting seats, and the left and right positions of the main beam on the same side are respectively fixed with second connecting seats. The first connecting seats and the second connecting seats are offset in the front-back direction, and the two ends of the lateral adjustment cylinder are respectively hinged to the corresponding first connecting seats and second connecting seats.

[0014] Furthermore, the longitudinal adjustment mechanism includes two longitudinal adjustment cylinders, which are distributed on the front and rear sides of the same end of the balance beam; the two ends of each longitudinal adjustment cylinder are respectively hinged to the end of the balance beam and the vertical suspension beam.

[0015] Furthermore, a third connecting seat is fixed to the front and rear sides of the same end of the balance beam, and a fourth connecting seat is fixed to the front and rear positions of the vertical lifting beam. The third and fourth connecting seats are offset in the left and right directions, and the two ends of the longitudinal adjustment cylinder are hinged to the corresponding third and fourth connecting seats respectively.

[0016] Furthermore, the lower end of the vertical lifting beam is provided with a first connecting hole, and the web of the balance beam is provided with a corresponding second connecting hole, through which the transverse pin passes.

[0017] Furthermore, the axis of the transverse pin is perpendicular to the web of the balance beam.

[0018] Furthermore, the balance beam is fixedly provided with fifth connecting seats at the left and right ends on the upper side, and a sixth connecting seat is fixedly provided at the position corresponding to the fifth connecting seat on the lower side of the main beam, with the longitudinal pin passing through the corresponding fifth connecting seat and the sixth connecting seat.

[0019] Furthermore, the axis of the longitudinal pin is parallel to the longitudinal centerline of the main beam.

[0020] Furthermore, the main beam has a trapezoidal cross-section.

[0021] The beneficial effects of this invention are:

[0022] Compared to existing technologies, this invention places the balance beam between the main beam and the blades, resulting in a smaller difference between the overall center of gravity arm of the spreader and the arm of the pitch cylinder when the spreader pitches, thus reducing the load-bearing capacity requirements of the cylinder. Simultaneously, this structure effectively reduces the height of the spreader itself, lowering the lifting height requirements for the crane. Attached Figure Description

[0023] Figure 1 This is an isometric view of the present invention;

[0024] Figure 2 This is the front view of the present invention;

[0025] Figure 3 yes Figure 2 AA section view in the middle;

[0026] Figure 4 yes Figure 2 BB section view in the middle.

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] like Figures 1 to 4 As shown, this embodiment provides a single-blade lifting device for a wind turbine, including a main beam 1, a vertical lifting beam 2, a balance beam 3, a longitudinal pin 4, a transverse pin 5, a transverse adjustment mechanism, and a longitudinal adjustment mechanism.

[0030] The main beam 1 has a trapezoidal cross-section. The main beam 1 is arranged in the left-right direction, and the blade fixing mechanism 8 is connected to the left and right ends of the main beam 1 respectively. Its structure adopts a clamping type or a sling type. The blade 9 is fixed on the blade fixing mechanism 8.

[0031] The vertical lifting beam 2 is arranged in an inverted U-shape along the vertical direction, and the main beam 1 passes through the middle of the vertical lifting beam 2. The upper end of the vertical lifting beam 2 is provided with a lifting hole 10 for connection with a crane.

[0032] The balance beam 3 is arranged in the left-right direction and is located below the main beam 1 and above the blade 9. The balance beam 3 is hinged to the lower end opening of the vertical lifting beam 2 by a transverse pin 5, and the axis of the transverse pin 5 is set in the front-back direction (perpendicular to the web of the balance beam 3).

[0033] Specifically, in this embodiment, the lower end of the vertical lifting beam 2 is provided with a first connecting hole, and the web of the balance beam 3 is provided with a second connecting hole. The transverse pin 5 passes through the corresponding first and second connecting holes.

[0034] The left and right ends of the balance beam 3 are hinged to the main beam 1 by longitudinal pins 4, and the axis of the longitudinal pins 4 is set in the left and right direction (parallel to the longitudinal center line of the main beam 1).

[0035] Specifically, in this embodiment, the balance beam 3 is fixedly provided with fifth connecting seats 15 at the left and right ends on the upper side, and the main beam 1 is fixed with sixth connecting seats 16 at the positions corresponding to the fifth connecting seats 15 on the lower side, and the longitudinal pin 4 passes through the corresponding fifth connecting seats 15 and sixth connecting seats 16.

[0036] The lateral adjustment mechanism includes two lateral adjustment cylinders 6, which are distributed at the left and right ends of the same side of the balance beam 3; the two ends of each lateral adjustment cylinder 6 are hinged to the main beam 1 and the balance beam 3 respectively.

[0037] Specifically, in this embodiment, first connecting seats 11 are fixed to the left and right ends of the same side of the balance beam 3, and second connecting seats 12 are fixed to the left and right positions of the same side of the main beam 1. The first connecting seats 11 and the second connecting seats 12 are offset in the front-back direction, and the two ends of the lateral adjustment cylinder 6 are hinged to the corresponding first connecting seats 11 and second connecting seats 12. This arrangement allows the lateral adjustment cylinder 6 to have a certain tilt in the front-back direction, which facilitates the application of force.

[0038] The longitudinal adjustment mechanism includes two longitudinal adjustment cylinders 7, which are distributed on the front and rear sides of the same end of the balance beam 3 (i.e., on the front and rear sides of the main beam 1); the two ends of each longitudinal adjustment cylinder 7 are hinged to the end of the balance beam 3 and the vertical suspension beam 2, respectively.

[0039] Specifically, in this embodiment, third connecting seats 13 are fixed to the front and rear sides of the same end of the balance beam 3, and fourth connecting seats 14 are fixed to the front and rear positions of the vertical lifting beam 2. The third connecting seats 13 and fourth connecting seats 14 are offset in the left and right directions, and the two ends of the longitudinal adjusting cylinder 7 are hinged to the corresponding third connecting seats 13 and fourth connecting seats 14. This arrangement allows the longitudinal adjusting cylinder 7 to have a certain tilt in the left and right directions, which facilitates the application of force.

[0040] The working principle of this invention is as follows:

[0041] After the blade is fixed, the blade 9 and the balance beam 3 are located below the main beam 1. By extending and retracting the lateral adjustment cylinder 6, the vertical lifting beam 2 and the balance beam 3 rotate relative to the main beam 1 around the longitudinal pin 4, thereby realizing blade pitch control.

[0042] After the blade is fixed, the blade 9 and the balance beam 3 are both located below the main beam 1. By extending and retracting the longitudinal adjustment cylinder 7, the vertical lifting beam 2 rotates relative to the main beam 1 and the balance beam 3 around the transverse pin 5, thereby realizing the change of the blade pitch angle.

[0043] This invention places the balance beam 3 between the main beam 1 and the blade 9, so that when the spreader pitches, the difference between the overall center of gravity arm of the spreader and the pitch cylinder arm is small, reducing the load-bearing capacity requirements of the cylinder. At the same time, this structure can significantly reduce the height of the spreader itself, thus reducing the lifting height requirements of the crane.

[0044] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0045] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and are not intended to 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 limitations on this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A single-blade lifting device for a wind turbine, comprising a main beam, wherein a blade fixing mechanism is provided on the main beam, characterized in that: It also includes a vertical lifting beam, a balance beam, a transverse pin, a longitudinal pin, a transverse adjustment mechanism, and a longitudinal adjustment mechanism; The vertical lifting beam is arranged vertically and has an inverted U-shaped structure. The main beam passes through the middle of the vertical lifting beam in the left-right direction. The upper end of the vertical lifting beam is equipped with a lifting assembly for connecting with the lifting equipment. The balance beam is arranged in the left-right direction and located below the main beam and above the blade; the balance beam and the lower end opening of the vertical lifting beam are hinged by a transverse pin, the axis of which is set in the front-back direction; the left and right ends of the balance beam are respectively hinged to the main beam by longitudinal pins, the axis of which is set in the left-right direction. The lateral adjustment mechanism is connected between the balance beam and the main beam. The vertical lifting beam and the balance beam rotate relative to the main beam around the longitudinal pin shaft through the lateral adjustment mechanism, thereby realizing blade pitch control. The longitudinal adjustment mechanism is connected between the vertical lifting beam and the balance beam. The longitudinal adjustment mechanism causes the vertical lifting beam to rotate relative to the main beam and the balance beam around the transverse pin, thereby realizing the change of the blade pitch angle. The lateral adjustment mechanism includes two lateral adjustment cylinders, which are distributed at the left and right ends on the same side of the balance beam; the two ends of each lateral adjustment cylinder are hinged to the main beam and the balance beam, respectively. The longitudinal adjustment mechanism includes two longitudinal adjustment cylinders, which are distributed on the front and rear sides of the same end of the balance beam; the two ends of each longitudinal adjustment cylinder are hinged to the end of the balance beam and the vertical suspension beam, respectively.

2. The wind turbine single-blade lifting device according to claim 1, characterized in that: The left and right ends of the balance beam on the same side are respectively fixed with first connecting seats, and the left and right positions of the main beam on the same side are respectively fixed with second connecting seats. The first connecting seats and the second connecting seats are offset in the front-back direction, and the two ends of the lateral adjustment cylinder are respectively hinged to the corresponding first connecting seats and second connecting seats.

3. The wind turbine single-blade lifting device according to claim 1, characterized in that: The balance beam has a third connecting seat fixed on both the front and rear sides of the same end, and a fourth connecting seat fixed on the front and rear positions of the vertical lifting beam. The third and fourth connecting seats are offset in the left and right direction, and the two ends of the longitudinal adjustment cylinder are hinged to the corresponding third and fourth connecting seats respectively.

4. The wind turbine single-blade lifting device according to claim 1, characterized in that: The lower end of the vertical lifting beam is provided with a first connecting hole, and the web of the balance beam is provided with a second connecting hole. The transverse pin passes through the corresponding first and second connecting holes.

5. The wind turbine single-blade lifting device according to claim 4, characterized in that: The axis of the transverse pin is perpendicular to the web of the balance beam.

6. The wind turbine single-blade lifting device according to claim 1, characterized in that: The balance beam has a fifth connecting seat fixed at both ends of the upper side, and a sixth connecting seat fixed at the corresponding position on the lower side of the main beam. The longitudinal pin passes through the corresponding fifth and sixth connecting seats.

7. The wind turbine single-blade lifting device according to claim 6, characterized in that: The axis of the longitudinal pin is parallel to the longitudinal centerline of the main beam.

8. The wind turbine single-blade lifting device according to any one of claims 1-7, characterized in that: The main beam has a trapezoidal cross-section.

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