Wind turbine rotor sling

Abstract

The present invention discloses a wind turbine rotor sling, which includes a sling and a lifting assembly. The sling is cooperatively installed on the hub, and the lifting assembly is connected to the sling. The sling includes a main board, two hanging seats, a two-force bar, two disassembly and installation limiting components, an adjustable multi-hole hanging plate, an installation hanging point, a limiting component, and a hook assembly. The adjustable multi-hole hanging plate is arranged on the main board. One hanging seat is installed at one end of the main board, and a two-force bar is arranged at the other end of the main board. Another hanging seat is installed on the two-force bar. The two disassembly and installation limiting components are respectively arranged between the main board and the two hanging seats. The limiting component is arranged on one side of the main board close to the two-force bar. This wind turbine rotor sling effectively solves the installation difficulty caused by insufficient installation space for large-sized bolts of the hanging seat fasteners; effectively ensures the safety factor of the hub device of the wind turbine with a large weight during the hoisting process, preventing the wind turbine rotor sling from tipping over and damaging the hub device of the wind turbine; and can be applicable to hubs of different specifications, improving the versatility.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine units, and particularly relates to a wind turbine rotor sling for wind turbine units. Background Art

[0002] As large-megawatt wind turbine units become the industry mainstream, in order to increase power generation, wind turbine unit equipment with tall towers and large wind rotors is usually adopted. As the unit model increases, the size and weight of the wind rotor composed of a hub device and three blades of the wind turbine unit increase accordingly. Conventional integrally welded steel plate type wind rotor slings cannot meet the installation accuracy requirements under large sizes, which further increases the difficulty of the design of the lifting points of the wind turbine hub and the overall design of the wind rotor sling.

[0003] In the existing wind rotor slings, the structure of the traditional main board, two-force rod and evenly distributed rectangular suspension seats only considers the state during horizontal lifting, and does not consider the alternating load borne by the hub lifting point bolts during the hoisting process of the wind rotor of the wind turbine unit, nor does it consider the curved surface shape of the wind turbine hub and the change of the center of gravity of the wind rotor caused by the lengthening of the blades of the wind turbine unit. The sling has poor versatility; at the same time, there is also a risk that the center of gravity of the sling and the lifting point of the lifting hook do not coincide, and thus the wind rotor sling will turn over when disassembling the wind rotor sling, knocking and damaging the hub cover and its internal components. Moreover, in order to meet the strength and stiffness requirements of the hub under various working conditions of the wind power and at the same time minimize the weight to the greatest extent, the curved surface design between adjacent two blade pitch surfaces is relatively small, and it is impossible to arrange enough wind rotor sling flanges to meet the safety factor requirements of the sling and bolts during the entire hoisting process of the wind rotor. In addition, if the sling suspension seat is installed separately first and then the connecting plate and the two-force rod are installed, the hoisting procedures of the on-site sling on the ground, deck and at high altitude increase, with low efficiency and high risk; if the sling is installed integrally, it will cause the problem of difficult bolt installation due to insufficient installation space for the large-sized bolts of the sling suspension seat. If the bolt specifications are reduced to ensure the installation space, the bolt safety factor is insufficient under the large wind rotor weight of the large-megawatt wind turbine unit.

[0004] In view of the problems of poor versatility, difficult installation, easy turning over and insufficient safety factor of the wind rotor sling in the prior art, it is necessary to provide a wind turbine hub device and a wind rotor sling. Summary of the Invention

[0005] To solve some or all of the above technical problems existing in the prior art, the present invention provides a wind rotor sling for wind turbine units. The wind rotor sling is matched with a wind turbine hub device to hoist the wind rotor of the wind turbine unit. The wind turbine hub device includes a hub, a hoisting flange and a positioning notch. The wind rotor sling for wind turbine units includes a sling and a lifting assembly. The sling is installed on the hub in a matching manner, and the lifting assembly is connected to the sling, wherein:

[0006] The lifting assembly includes a main sling, a disassembly rigging, a shackle assembly, and an auxiliary pull rope. One end of the main sling is connected to one end of the shackle assembly. One end of the disassembly rigging is connected to the other end of the main sling, i.e., the side of the crane hook. The auxiliary pull rope is arranged at the other end of the disassembly rigging.

[0007] The spreader includes a main board, two lifting seats, a two-force bar, two disassembly and assembly limit components, an adjustable multi-hole lifting plate, a mounting lifting point, a limit component, and a hook component. The adjustable multi-hole lifting plate is arranged on the main board. One end of the main board is equipped with one of the lifting seats. The other end of the main board is provided with the two-force bar. The other lifting seat is installed on the two-force bar. The two disassembly and assembly limit components are respectively arranged between the main board and the two lifting seats. The limit component is arranged on one side of the main board close to the two-force bar. The mounting lifting point is welded on one side of the main board. The hook component is arranged on the other side of the main board.

[0008] Further, in the above-mentioned wind turbine rotor spreader, the lifting seat includes a connecting plate, a base, a plurality of connecting holes, lifting seat fasteners, a limit tooling component, a bolt adjusting sleeve, and a lifting seat eccentric key component. The connecting plate is perpendicularly welded to the base. The plurality of connecting holes are symmetrically arranged on the base. The bolt adjusting sleeve is arranged inside the connecting hole. The limit tooling component is arranged on both sides of the connecting plate. The lifting seat fasteners are respectively arranged inside the bolt adjusting sleeve and on the limit tooling component. The lifting seat eccentric key component is arranged in the middle of the base corresponding to one side of the connecting plate.

[0009] Further, in the above-mentioned wind turbine rotor spreader, the lifting seat eccentric key component includes a disassembly fastener component and an installation fastener component. The disassembly fastener component can be installed in the positioning notch of the wind turbine hub device. The installation fastener component is connected to the base of the lifting seat for quick positioning of the lifting seat and the wind turbine hub device.

[0010] Further, in the above-mentioned wind turbine rotor spreader, both ends of the two-force bar are provided with notches. The opening degree of the notches matches the thickness of the main board and the lifting seat. One end of the two-force bar is fitted into the main board through the notch. The lifting seat is fitted into the notch at the other end of the two-force bar through the connecting plate.

[0011] Further, in the above-mentioned wind turbine rotor spreader, one end of the main board is provided with an installation groove for connecting the lifting seat. The width of the installation groove matches the thickness of the lifting seat. The lifting seat is fitted into the installation groove through the connecting plate.

[0012] Further, in the above-mentioned wind turbine rotor sling, the two hanging seats are respectively fitted to the two hoisting flanges of the wind turbine hub device, and the hanging seat fasteners pass through the base and are connected to the hoisting flange.

[0013] Further, in the above-mentioned wind turbine rotor sling, a plurality of mounting holes are provided on the adjustable multi-hole lifting plate, and the other end of the shackle assembly passes through the mounting holes and is connected to the adjustable multi-hole lifting plate.

[0014] Further, in the above-mentioned wind turbine rotor sling, the hook assembly is connected to the main board rotating shaft by bolts.

[0015] Further, in the above-mentioned wind turbine rotor sling, lugs are welded on the same side of the main board and the hanging seat, and the two disassembly and assembly limit components are respectively arranged between the main board and the two hanging seats via the lugs and corresponding fixing bolts.

[0016] The wind turbine rotor sling of the present invention has the following advantages and beneficial effects:

[0017] It can effectively avoid the inability to normally disassemble the hanging seat fasteners due to space limitations after the sling is assembled, and effectively solve the installation difficulty caused by insufficient installation space for large-size bolts of the hanging seat fasteners;

[0018] It effectively ensures the safety factor of the relatively heavy wind turbine hub device during hoisting, realizes the installation accuracy of the hanging seat under a large span, and can also effectively prevent the wind turbine rotor sling from tipping over and damaging the wind turbine hub device during disassembly;

[0019] It can be applicable to wind turbine hub devices of different specifications, improving the versatility of the wind turbine rotor sling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0021] Figure 1 It is a schematic diagram of the state where the wind turbine rotor sling of the present invention cooperates with the wind turbine hub device;

[0022] Figure 2 It is a schematic diagram of the main structure of the wind turbine hub device;

[0023] Figure 3Schematic structural diagram of the wind turbine rotor sling for the present invention;

[0024] Figure 4 is Figure 3 An enlarged schematic diagram of part K in [reference], in which the structure related to the sling fastener is additionally shown;

[0025] Figure 5 is the sectional view taken along Figure 4 A - A in [reference];

[0026] Figure 6 is the sectional view taken along Figure 4 F - F in [reference];

[0027] Figure 7 is the view taken along Figure 4 B direction in [reference];

[0028] Figure 8 is the sectional view taken along Figure 7 C - C in [reference];

[0029] Figure 9 Schematic structural diagram of the connection structure between the sling seat of the wind turbine rotor sling of the present invention and the hub;

[0030] Figure 10 is the sectional view taken along Figure 9 D - D in [reference];

[0031] Figure 11 is the sectional view taken along Figure 9 E - E in [reference].

[0032] Description of reference numerals:

[0033] 1 - Wind turbine hub device, 11 - Hub, 12 - Hoisting flange, 13 - Positioning notch;

[0034] 2 - Wind turbine rotor sling, 21 - Sling, 22 - Lifting assembly; 221 - Main sling, 222 - Demounting rigging, 223 - Shackle assembly, 224 - Auxiliary pull rope;

[0035] 3 - Main board, 31 - Installation lifting point, 32 - Installation groove, 33 - Lug;

[0036] 4 - Sling seat, 41 - Connecting plate, 42 - Base, 43 - Connecting hole, 44 - Sling seat fastener, 45 - Limit tooling assembly, 46 - Bolt adjusting sleeve, 47 - Sling seat eccentric key assembly, 471 - Demounting fastener assembly, 472 - Installation fastener assembly;

[0037] 5 - Two - force bar, 51 - Notch;

[0038] 6 - Disassembly and assembly limit component;

[0039] 7 - Adjustable multi - hole sling plate, 71 - Installation hole;

[0040] 8 - Limit component;

[0041] 9 - Hook component. Detailed implementation manner

[0042] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0043] The wind turbine rotor sling of the present invention is matched with the wind turbine hub device to hoist the wind turbine rotor. As Figures 1 to 11 shown, the wind turbine hub device 1 includes a hub 11, a hoisting flange 12 and a positioning notch 13. The rotor sling 2 includes a sling 21 and a hoisting assembly 22. Among them, the sling 21 is fitted and installed on the hub 11, and the hoisting assembly 22 is connected to the sling 21 for hoisting the rotor.

[0044] The hoisting assembly 22 includes a main sling 221, a disassembly rigging 222, a shackle assembly 223 and an auxiliary pull rope 224. One end of the main sling 221 is connected to one end of the shackle assembly 223. One end of the disassembly rigging 222 is connected to the other end of the main sling 221, that is, the crane hook side. The auxiliary pull rope 224 is arranged at the other end of the disassembly rigging 222.

[0045] The sling 21 includes a main board 3, two hanging seats 4, a two-force bar 5, two disassembly and installation limit components 6, an adjustable multi-hole hanging plate 7, an installation hanging point 31, a limit component 8 and a hook component 9. The adjustable multi-hole hanging plate 7 is arranged on the main board 3. One end of the main board 3 is provided with a hanging seat 4, and the other end of the main board 3 is provided with a two-force bar 5. Another hanging seat 4 is installed on the two-force bar 5. The two disassembly and installation limit components 6 are respectively arranged between the main board 3 and the two hanging seats 4. The limit component 8 is arranged on one side of the main board 3 close to the two-force bar 5. The installation hanging point 31 is welded on one side of the main board 3. The hook component 9 is arranged on the other side of the main board 3.

[0046] A plurality of installation holes 71 are arranged on the adjustable multi-hole hanging plate 7. The other end of the shackle assembly 223 passes through the installation holes 71 and is connected to the adjustable multi-hole hanging plate 7.

[0047] The suspension seat 4 includes a connecting plate 41, a base 42, a plurality of connecting holes 43, a suspension seat fastener 44, a limit tooling component 45, a bolt adjusting sleeve 46, and a suspension seat eccentric key component 47. The connecting plate 41 is perpendicularly welded to the base 42. The plurality of connecting holes 43 are symmetrically arranged on the base 42. The bolt adjusting sleeve 46 is arranged inside the connecting hole 43. The limit tooling component 45 is arranged on both sides of the connecting plate 41. The suspension seat fasteners 44 are respectively arranged inside the bolt adjusting sleeves 46. When pre-installing and disassembling the lifting tool, the suspension seat fasteners 44 can be placed on the limit tooling component 45. The suspension seat eccentric key component 47 is arranged on one side of the middle part of the base 42 corresponding to the connecting plate 41.

[0048] The suspension seat eccentric key component 47 includes a disassembly fastener component 471 and an installation fastener component 472. The disassembly fastener component 471 can be installed in the positioning notch 13 of the wind turbine hub device 1. The installation fastener component 472 is connected to the base 42 of the suspension seat 4 to achieve the rapid positioning of the suspension seat 4 and the wind turbine hub device 1. At the same time, the suspension seat eccentric key component 47 can bear the shear force to improve the safety factor of the suspension seat bolts.

[0049] Notches 51 are provided at both ends of the two-force bar 5. The opening degree of the notches 51 matches the thicknesses of the main board 3 and the suspension seat 4. One end of the two-force bar 5 is fitted into the main board 3 through the notch 51, and the connection between the two-force bar 5 and the main board 3 is achieved by passing a pin shaft through the two-force bar 5 and the main board 3. The suspension seat 4 is fitted into the notch 51 at the other end of the two-force bar 5 through the connecting plate 41, and the connection between the suspension seat 4 and the two-force bar 5 is achieved by passing a pin shaft through the two-force bar 5 and the connecting plate 41.

[0050] An installation groove 32 is provided at one end of the main board 3 for connecting the suspension seat 4. The width of the installation groove 32 matches the thickness of the suspension seat 4. The suspension seat 4 is fitted into the installation groove 32 through the connecting plate 41, and the connection between the suspension seat 4 and the main board 3 is achieved by passing a pin shaft through the main board 3 and the connecting plate 41.

[0051] As a specific implementation manner, the hook assembly 9 is rotationally connected to the main board 3 through bolts.

[0052] As a specific implementation manner, lugs 33 are welded on the same side of the main board 3 and the suspension seat 4. The two disassembly and installation limit components 6 are respectively arranged between the main board 3 and the two suspension seats 4 via the lugs 33 and the corresponding fixing bolts.

[0053] The two suspension seats 4 of the wind wheel lifting tool 2 for a wind turbine of the present invention are respectively matched with the two lifting flanges 12 of the wind turbine hub device 1. The suspension seat fasteners 44 pass through the base 42 and are connected to the lifting flange 12.

[0054] The using process of the wind wheel lifting tool for a wind turbine of the present invention is as follows:

[0055] 1. Assemble the wind turbine rotor sling 2. Assemble the sling 21 on the ground or deck. When assembling, first fix the sling seat fastener 44 on both sides of the connecting plate 41 corresponding to the connecting hole 43 through the limit tooling component 45 in advance, thus effectively avoiding the inability to install and disassemble the sling seat fastener 44 normally due to space limitations after the sling 21 is assembled. After the sling seat 4 is assembled, install it on one end of the main board 3 and the two-force bar 5 respectively, then install the two-force bar 5 on the other end of the main board 3, limit the two-force bar 5 through the limit component 8, and limit the sling seat 4 through the disassembly and assembly limit component 6.

[0056] 2. Connect the wind turbine rotor sling 2 to the wind turbine hub device 1. Install the shackle assembly 223 in the matching mounting hole 71, so as to adjust the lifting position according to the change of the center of gravity of the wind turbine hub device 1. With the assistance of the installed lifting point 31, place the wind turbine rotor sling 2 horizontally at the designated position on the hub 11. Achieve the rapid positioning of the sling seat 4 with the lifting flange 12 and the positioning notch 13 of the wind turbine hub device 1 through the sling seat eccentric key component 47, and connect the sling seat 4 and the hub 11 through the sling seat fastener 44 on the limit tooling component 45 and the sling seat fastener 44 on the connecting hole 43. This not only effectively solves the installation difficulty caused by the insufficient installation space of the large-size bolts of the sling seat fastener 44, but also effectively guarantees the safety factor of the bolts during the lifting process of the relatively heavy wind turbine hub device 1 by the sling seat eccentric key component 47 bearing the shear force.

[0057] 3. After the wind turbine rotor sling 2 is installed, remove the disassembly and assembly limit component 6. Through the cooperation of two cranes, adjust the wind turbine hub device 1 to the state of docking with the nacelle. After the wind turbine hub device 1 is installed, install the disassembly and assembly limit component 6 back to the original position of the sling seat 4, then remove the sling seat fastener 44, and fix the sling seat fastener 44 near both sides of the connecting plate 41 through the limit tooling component 45. Move the crane hook towards the nacelle and the ground or deck direction. Connect the disassembly rigging 222 and the hook assembly 9 through the auxiliary pull rope 224 to make the hook consistent with the center of the sling 21, so as to effectively prevent the wind turbine rotor sling 2 from tipping over and damaging the wind turbine hub device 1 when the wind turbine rotor sling 2 is removed.

[0058] In addition, when using the wind turbine rotor sling for wind turbines of the present invention to lift wind turbine hub devices 1 of different specifications, since the sizes of the sling seat fasteners 44 used will also be correspondingly different, the wind turbine rotor sling 2 can be adapted to wind turbine hub devices 1 of different specifications through the bolt adjustment sleeve 46.

[0059] In summary, the wind turbine rotor sling of the present invention can effectively avoid the inability to normally disassemble the fasteners of the sling seat due to space limitations after the sling is assembled, effectively solve the installation difficulties caused by insufficient installation space for the large-sized bolts of the sling seat fasteners, effectively ensure the safety factor of the relatively heavy wind turbine hub device during the hoisting process, achieve the installation accuracy of the sling seat under a large span, effectively prevent the wind turbine rotor sling from flipping and damaging the wind turbine hub device during disassembly, and this wind turbine rotor sling can be applied to wind turbine hub devices of different specifications, improving the versatility of the wind turbine rotor sling.

[0060] It should be noted that in this article, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "up" and "down" are all referenced to the placement state shown in the drawings.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wind turbine rotor sling, which is fitted to the hub device of a wind turbine and is used for hoisting the wind turbine rotor. The hub device of the wind turbine includes a hub, a hoisting flange and a positioning notch, and is characterized in that, The wind turbine rotor sling includes a sling and a lifting assembly. The sling is fitted and installed onto the hub, and the lifting assembly is connected to the sling, where: The lifting assembly includes a main sling, a disassembly rigging, a shackle assembly, and an auxiliary pull rope. One end of the main sling is connected to one end of the shackle assembly, one end of the disassembly rigging is connected to the other end of the main sling, and the auxiliary pull rope is arranged at the other end of the disassembly rigging; The sling includes a main board, two hanging seats, a two-force bar, two disassembly and assembly limit components, an adjustable multi-hole hanging plate, a mounting hanging point, a limit component, and a hook component. The adjustable multi-hole hanging plate is arranged on the main board. One end of the main board is installed with one of the hanging seats, the other end of the main board is provided with the two-force bar, and the other hanging seat is installed on the two-force bar. The two disassembly and assembly limit components are respectively arranged between the main board and the two hanging seats. The limit component is arranged on one side of the main board close to the two-force bar. The mounting hanging point is welded on one side of the main board, and the hook component is arranged on the other side of the main board; The hanging seat includes a connecting plate, a base, a plurality of connecting holes, hanging seat fasteners, a limit tooling component, a bolt adjusting sleeve, and a hanging seat eccentric key component. The connecting plate is perpendicularly welded to the base. The plurality of connecting holes are symmetrically arranged on the base. The bolt adjusting sleeve is arranged inside the connecting holes. The limit tooling component is arranged on both sides of the connecting plate. The hanging seat fasteners are respectively arranged inside the bolt adjusting sleeve and on the limit tooling component to connect the hanging seat to the hub. The hanging seat eccentric key component is arranged in the middle of the base corresponding to one side of the connecting plate to achieve the rapid positioning of the hanging seat with the lifting flange and the positioning notch; The hanging seat eccentric key component includes a disassembly fastener component and an installation fastener component. The disassembly fastener component can be installed in the positioning notch of the wind turbine hub device, and the installation fastener component is connected to the base of the hanging seat.

2. The wind turbine rotor sling according to claim 1, characterized in that Both ends of the two-force bar are provided with notches. The opening degree of the notches matches the thickness of the main board and the hanging seat. One end of the two-force bar is fitted onto the main board through the notch, and the hanging seat is fitted into the notch at the other end of the two-force bar through the connecting plate.

3. The wind turbine rotor sling according to claim 1, characterized in that, One end of the main board is provided with an installation groove for connecting the hanging seat. The width of the installation groove matches the thickness of the hanging seat. The hanging seat is fitted into the installation groove through the connecting plate.

4. The wind turbine rotor sling according to claim 1, characterized in that, The two hanging seats respectively cooperate with the two lifting flanges of the wind turbine hub device, and the hanging seat fasteners pass through the base and are connected to the lifting flange.

5. The wind turbine rotor sling according to claim 1, characterized in that A plurality of installation holes are arranged on the adjustable multi-hole hanging plate, and the other end of the shackle assembly passes through the installation holes and is connected to the adjustable multi-hole hanging plate.

6. The wind turbine rotor sling according to claim 1, wherein, The hook component is connected to the rotating shaft of the main board through bolts.

7. The wind turbine rotor sling according to claim 1, characterized in that, Lugs are welded on the same side of the main board and the hanging seat, and the two disassembly and assembly limit components are respectively arranged between the main board and the two hanging seats via the lugs and corresponding fixing bolts.

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