Single-blade lifting appliance for wind driven generator

Abstract

The invention discloses a wind driven generator single-blade lifting appliance which comprises a main beam, and a blade fixing mechanism is arranged on the main beam. The lifting device further comprises a vertical lifting beam, a balance beam, a transverse pin shaft, a longitudinal pin shaft, a transverse adjusting mechanism and a longitudinal adjusting mechanism. The vertical lifting beam is of an inverted-U-shaped structure, and the main beam penetrates through the middle of the vertical lifting beam. The balance beam is positioned below the main beam and above the blades; the balance beam is hinged with the lower end opening of the vertical hanging beam through a transverse pin shaft; the left and right ends of the balance beam are respectively hinged with the main beams through longitudinal pin shafts; the transverse adjusting mechanism is connected between the balance beam and the main beam, and the vertical hanging beam and the balance beam rotate around the longitudinal pin shaft relative to the main beam through the transverse adjusting mechanism. The longitudinal adjusting mechanism is connected between the vertical hanging beam and the balance beam, and the vertical hanging beam rotates around the transverse pin shaft relative to the main beam and the balance beam through the longitudinal adjusting mechanism. When the lifting appliance changes the pitch, the difference value between the whole gravity center force arm of the lifting appliance and the variable-pitch oil cylinder force arm is small, and the requirement for the bearing capacity of the oil cylinder is lowered.

Description

Technical Field

[0001] The invention relates to the technical field of wind generator blade hoisting, in particular to a wind generator single blade hoisting device. Background Art

[0002] The single-blade hanger of a wind turbine with a pitch adjustment function is commonly used, and its pitch device is located on the upper surface of the main beam. This design will lead to the following problems.

[0003] First, when the blades are changed into pitch, there will be a large difference between the overall center of gravity force arm of the sling and the force arm of the pitch cylinder, and the cylinder load requirements will be high and the stroke will be long, which will increase the production cost of the sling.

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

[0005] In order to solve the problems in the prior art, the present invention provides a single-blade hanger for a wind turbine generator.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A single-blade hanger for a wind turbine generator comprises a main beam, a blade fixing mechanism is arranged on the main beam, a vertical hanging beam, a balance beam, a transverse pin shaft, a longitudinal pin shaft, a transverse adjustment mechanism and a longitudinal adjustment mechanism; The vertical hanging beam is arranged in the up-down direction and is an inverted U-shaped structure, and the main beam passes through the middle of the vertical hanging beam in the left-right direction; a lifting assembly is provided at the upper end of the vertical hanging beam for connecting with the lifting equipment; The balance beam is arranged in the left-right direction and is located below the main beam and above the blade; the balance beam is hinged to the lower opening of the vertical suspension beam through a transverse pin shaft, and the axis of the transverse pin shaft is arranged in the front-back direction; the left and right ends of the balance beam are hinged to the main beam through longitudinal pin shafts respectively, and the axis of the longitudinal pin shaft is arranged in the left-right direction; The lateral adjustment mechanism is connected between the balance beam and the main beam. The vertical suspension beam and the balance beam are rotated relative to the main beam around the longitudinal pin shaft through the lateral adjustment mechanism, thereby realizing blade pitch change. The longitudinal adjustment mechanism is connected between the vertical suspension beam and the balance beam. The vertical suspension beam is rotated 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 pitch angle of the blade.

[0007] Furthermore, the lateral adjustment mechanism includes two lateral adjustment cylinders, which are distributed at the left and right ends of the same side of the balance beam; the two ends of each lateral adjustment cylinder are respectively hinged to the main beam and the balance beam.

[0008] Furthermore, a first connecting seat is fixed on the left and right ends of the same side of the balance beam, and a second connecting seat is fixed on the left and right positions of the same side of the main beam. The first connecting seat and the second connecting seat are staggered in the front and rear directions, and the two ends of the lateral adjustment cylinder are hinged to the corresponding first connecting seat and the second connecting seat respectively.

[0009] 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.

[0010] Furthermore, third connecting seats are fixed on the front and rear sides of the same end of the balance beam, and fourth connecting seats are fixed on the front and rear positions of the vertical suspension beam. The third connecting seat and the fourth connecting seat are staggered in the left and right directions, and the two ends of the longitudinal adjustment cylinder are hinged to the corresponding third connecting seat and fourth connecting seat respectively.

[0011] Furthermore, a first connecting hole is provided at the lower end of the vertical suspension beam, a second connecting hole is correspondingly provided at the web position of the flat cross beam, and the transverse pin passes through the corresponding first connecting hole and the second connecting hole.

[0012] Furthermore, the axis of the transverse pin is perpendicular to the web of the flat beam.

[0013] Furthermore, the balance beam is fixed with fifth connection seats at the left and right ends of the upper side, and sixth connection seats are fixed at positions corresponding to the fifth connection seats on the lower side of the main beam, and the longitudinal pin shaft passes through the corresponding fifth connection seat and sixth connection seat.

[0014] Furthermore, the axis of the longitudinal pin is parallel to the longitudinal center line of the main beam.

[0015] Furthermore, the main beam has a trapezoidal cross-section.

[0016] Beneficial effects of the present invention: Compared with the prior art, the present invention places the balance beam between the main beam and the blade, so that when the spreader changes the pitch, the difference between the overall center of gravity arm of the spreader and the pitch cylinder arm is small, reducing the requirements for the cylinder's bearing capacity. At the same time, this structure can well reduce the height of the spreader itself and reduce the lifting height requirements for the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of the present invention; Figure 2 It is a front view of the present invention; Figure 3 yes Figure 2 AA section view in; Figure 4 yes Figure 2 BB section view in.

[0018] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] like Figures 1 to 4 As shown, this embodiment provides a single-blade hanger for a wind turbine, comprising a main beam 1, a vertical hanging beam 2, a balance beam 3, a longitudinal pin shaft 4, a transverse pin shaft 5, a transverse adjustment mechanism and a longitudinal adjustment mechanism.

[0021] The main beam 1 is a trapezoidal cross section. The main beam 1 is arranged in the left-right direction. The blade fixing mechanism 8 is respectively connected to the left and right ends of the main beam 1 , and its structural form adopts a clamping type or a sling type. The blade 9 is fixed on the blade fixing mechanism 8 .

[0022] The vertical hanging beam 2 is arranged in the up-down direction and is an inverted U-shaped structure, and the main beam 1 passes through the middle of the vertical hanging beam 2. A lifting hole 10 is provided at the upper end of the vertical hanging beam 2 for connecting with a crane.

[0023] 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 opening of the vertical suspension beam 2 through a transverse pin 5, and the axis of the transverse pin 5 is arranged in the front-back direction (perpendicular to the web of the flat beam 3).

[0024] Specifically in this embodiment, a first connecting hole is provided at the lower end of the vertical suspension beam 2, a second connecting hole is correspondingly opened at the web position of the flat cross beam 3, and the transverse pin 5 passes through the corresponding first connecting hole and the second connecting hole.

[0025] The left and right ends of the balance beam 3 are hinged to the main beam 1 through longitudinal pin shafts 4 respectively, and the axis of the longitudinal pin shaft 4 is arranged along the left and right direction (parallel to the longitudinal center line of the main beam 1).

[0026] Specifically in this embodiment, the balance beam 3 is fixed with fifth connecting seats 15 at the left and right ends of the upper side, and the sixth connecting seats 16 are fixed at the positions corresponding to the fifth connecting seats 15 on the lower side of the main beam 1, and the longitudinal pin shaft 4 passes through the corresponding fifth connecting seat 15 and sixth connecting seat 16.

[0027] The lateral adjustment mechanism comprises 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.

[0028] Specifically in this embodiment, the left and right ends of the same side of the balance beam 3 are respectively fixed with a first connection seat 11, and the left and right positions of the same side of the main beam 1 are respectively fixed with a second connection seat 12. The first connection seat 11 and the second connection seat 12 are offset in the front-to-back direction, and the two ends of the lateral adjustment cylinder 6 are respectively hinged to the corresponding first connection seat 11 and the second connection seat 12. This arrangement enables the lateral adjustment cylinder 6 to have a certain inclination in the front-to-back direction, which is convenient for exerting force.

[0029] 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 (that is, located on the front and rear sides of the main beam 1); the two ends of each longitudinal adjustment cylinder 7 are respectively hinged to the end of the balance beam 3 and the vertical suspension beam 2.

[0030] Specifically in this embodiment, the third connection seat 13 is fixed to the front and rear sides of the same end of the balance beam 3, and the fourth connection seat 14 is fixed to the front and rear positions of the vertical suspension beam 2. The third connection seat 13 and the fourth connection seat 14 are staggered in the left and right directions, and the two ends of the longitudinal adjustment cylinder 7 are respectively hinged to the corresponding third connection seat 13 and the fourth connection seat 14. This arrangement allows the longitudinal adjustment cylinder 7 to have a certain inclination in the left and right directions, which is convenient for exerting force.

[0031] The working principle of the present invention is as follows: After the sling completes the fixing of the blades, the blades 9 and the balance beam 3 are both located below the main beam 1. By extending and retracting the cylinder 6 laterally, the vertical sling beam 2 and the balance beam 3 are rotated relative to the main beam 1 around the longitudinal pin shaft 4, thereby realizing blade pitch change.

[0032] After the sling completes the fixing of the blade, 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 suspension beam 2 rotates around the transverse pin 5 relative to the main beam 1 and the balance beam 3, thereby realizing the change of the blade pitch angle.

[0033] The present invention places the balance beam 3 between the main beam 1 and the blade 3, so that when the sling is changing pitch, the difference between the overall gravity arm of the sling and the arm of the pitch cylinder is small, reducing the requirements for the bearing capacity of the cylinder. At the same time, this structure can well reduce the height of the sling itself and reduce the lifting height requirements of the crane.

[0034] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0035] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be 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.

Claims

1. A single-blade hanger for a wind turbine generator, comprising a main beam, on which a blade fixing mechanism is provided, characterized in that: It also includes a vertical hanging beam, a balance beam, a transverse pin, a longitudinal pin, a transverse adjustment mechanism and a longitudinal adjustment mechanism; The vertical hanging beam is arranged in the up-down direction and is an inverted U-shaped structure, and the main beam passes through the middle of the vertical hanging beam in the left-right direction; a lifting assembly is provided at the upper end of the vertical hanging beam for connecting with the lifting equipment; The balance beam is arranged in the left-right direction and is located below the main beam and above the blade; the balance beam is hinged to the lower opening of the vertical suspension beam through a transverse pin shaft, and the axis of the transverse pin shaft is arranged in the front-back direction; the left and right ends of the balance beam are hinged to the main beam through longitudinal pin shafts respectively, and the axis of the longitudinal pin shaft is arranged in the left-right direction; The lateral adjustment mechanism is connected between the balance beam and the main beam. The vertical suspension beam and the balance beam are rotated relative to the main beam around the longitudinal pin shaft through the lateral adjustment mechanism, thereby realizing blade pitch change. The longitudinal adjustment mechanism is connected between the vertical suspension beam and the balance beam. The vertical suspension beam is rotated 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 pitch angle of the blade.

2. The single blade hanger for a wind turbine generator according to claim 1, characterized in that: The lateral adjustment mechanism comprises two lateral adjustment oil cylinders, which are distributed at the left and right ends of the same side of the balance beam; the two ends of each lateral adjustment oil cylinder are respectively hinged to the main beam and the balance beam.

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

4. The single blade hanger for a wind turbine generator according to claim 1, characterized in that: The longitudinal adjustment mechanism comprises two longitudinal adjustment cylinders, which are distributed at 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.

5. The single blade hanger for a wind turbine generator according to claim 4, characterized in that: The third connecting seat is fixed on the front and rear sides of the same end of the balance beam, and the fourth connecting seat is fixed on the front and rear positions of the vertical hanging beam. The third connecting seat and the fourth connecting seat are offset in the left and right directions, and the two ends of the longitudinal adjustment cylinder are hinged to the corresponding third connecting seat and fourth connecting seat respectively.

6. The single blade hanger for a wind turbine generator according to claim 1, characterized in that: A first connecting hole is provided at the lower end of the vertical suspension beam, a second connecting hole is correspondingly provided at the web position of the flat cross beam, and a transverse pin passes through the corresponding first connecting hole and the second connecting hole.

7. The single blade hanger for a wind turbine generator according to claim 6, characterized in that: The axis of the transverse pin is perpendicular to the web of the flat beam.

8. The single blade hanger for a wind turbine generator according to claim 1, characterized in that: The balance beam is fixed with fifth connection seats at the left and right ends of the upper side respectively, and sixth connection seats are fixed at the positions corresponding to the fifth connection seats at the lower side of the main beam respectively, and the longitudinal pin shaft passes through the corresponding fifth connection seat and sixth connection seat.

9. The single blade hanger for a wind turbine generator according to claim 8, characterized in that: The axis of the longitudinal pin is parallel to the longitudinal center line of the main beam.

10. The single blade hanger for a wind turbine generator according to any one of claims 1 to 9, characterized in that: The main beam has a trapezoidal cross section.

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