Maintenance platform, hub assembly for wind generating set and wind generating set

Abstract

The utility model provides a maintenance platform, a hub assembly used for a wind generating set and the wind generating set, the maintenance platform is suitable for a hub of the wind generating set, the maintenance platform comprises a support and a first bottom plate, the support is used for being connected to the hole wall of a manhole of the hub, and the first bottom plate is arranged on the support; the support comprises a first guide part which extends out of the hub in the axial direction of the manhole. The first bottom plate is movably connected to the support in the axial direction of the manhole, the first bottom plate comprises a second guide part matched with the first guide part, and the second guide part can move relative to the first guide part so as to drive the first bottom plate to move relative to the support; the first bottom plate is movably connected to the support so as to be capable of moving out of the hub, the first bottom plate can be used for bearing an operator for overhauling the hub, a lifting basket does not need to be additionally built, and therefore the operation and maintenance cost of the hub is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to a maintenance platform, a hub assembly for a wind power generator set, and a wind power generator set. Background Art

[0002] Wind turbines can be used to convert wind energy into electrical energy. With the increasing popularity of green energy, wind turbines have attracted much attention.

[0003] The wind turbine generator set includes a tower, a hub arranged on the top of the tower, at least two blades and a generator. The at least two blades are evenly arranged on the hub, and the blades and the hub are combined to form an impeller. The impeller is connected to the generator rotor. When the impeller rotates relative to the tower, the impeller can drive the rotor of the generator to rotate, thereby converting wind energy into electrical energy.

[0004] With the implementation of the cost reduction concept of wind turbines, some hubs are no longer covered by fairings, which also reduces the space occupied and avoids height or width restrictions during transportation. During the operation and maintenance of hubs without fairings, it is usually necessary to use Spiderman or build a lifting basket outside the hub, which is complicated to disassemble and assemble, resulting in high operation and maintenance costs of the hub. Utility Model Content

[0005] The main purpose of the present disclosure is to provide a maintenance platform, a hub assembly for a wind turbine generator set, and a wind turbine generator set, so as to reduce the operation and maintenance cost of the hub.

[0006] To achieve the above objectives, the present disclosure provides at least the following technical solutions:

[0007] One aspect of the present disclosure provides a maintenance platform suitable for the hub of a wind turbine generator set, the maintenance platform comprising a bracket and a first base plate, the bracket being used to be connected to the wall of a manhole of the hub, the bracket comprising a first guide member extending axially along the manhole to the outside of the hub; the first base plate is movably connected to the bracket along the axial direction of the manhole, the first base plate comprising a second guide member matching the first guide member, the second guide member being capable of moving relative to the first guide member to drive the first base plate to move relative to the bracket.

[0008] According to an exemplary embodiment of the present disclosure, the maintenance platform also includes a pair of second bottom plates, which are rotatably connected to both sides of the first bottom plate in the width direction, so that the second bottom plates are located in a folded position and an unfolded position relative to the first bottom plate. When the second bottom plate is in the folded position, the second bottom plate is stacked above the first bottom plate, and when the second bottom plate is in the unfolded position, the second bottom plate is located on one side of the width direction of the first bottom plate.

[0009] Optionally, the maintenance platform also includes a base plate locking pin, which has a U-shaped structure. The base plate locking pin includes a connecting portion and a locking portion that are spaced apart, and the connecting portion is rotatably connected to the first base plate. The second base plate is provided with a pin hole that matches the locking portion. When the second base plate is in the expanded position, the locking portion can be inserted into the pin hole so that the second base plate is locked in the expanded position.

[0010] Specifically, the first bottom plate is provided with a connecting hole and a receiving hole, the connecting portion is rotatably connected to the connecting hole so as to rotate between a locking position and an unlocking position, and when the bottom plate locking pin is located at the unlocking position, the locking portion is inserted into the receiving hole; when the second bottom plate is in the unfolded position, the locking portion can be inserted into the pin hole, and at this time the bottom plate locking pin is located at the locking position.

[0011] Furthermore, the maintenance platform also includes a return spring, which is sleeved on the outer peripheral side of the connecting portion and compressed in the connecting hole.

[0012] According to another exemplary embodiment of the present disclosure, the base plate locking pin further includes a connecting portion connected between the connecting portion and the locking portion, and the maintenance platform further includes a lifting ring rotatably disposed on the connecting portion.

[0013] Optionally, the maintenance platform further includes a guardrail unit, and the guardrail unit is detachably connected to the first bottom plate and / or the second bottom plate.

[0014] Specifically, a plug-in column is provided at the bottom of the guardrail unit, and plug-in holes matching the plug-in column are provided at the outer peripheral edges of the first bottom plate and the second bottom plate. When the plug-in column is inserted into the plug-in hole, the guardrail unit is connected to the first bottom plate and / or the second bottom plate.

[0015] Furthermore, the maintenance platform also includes a plug-in column locking pin, which is movably connected to the plug-in column. The plug-in column locking pin can protrude outward relative to the outer peripheral wall of the plug-in column. When the plug-in column is connected to the plug-in hole, the plug-in column locking pin protrudes outward relative to the plug-in column to be clamped on the first bottom plate and / or the second bottom plate where the plug-in hole is located.

[0016] According to another exemplary embodiment of the present disclosure, the plug-in column lock pin is a spring pin, which is arranged on the plug-in column and can protrude outward or retract inward relative to the outer peripheral wall of the plug-in column, and when the plug-in column is connected to the plug-in hole, the spring pin is engaged in the plug-in hole; or, the plug-in column lock pin is pluggably arranged on the plug-in column, the first base plate and the second base plate are provided with a lock pin holder, and the lock pin holder is provided with a lock pin socket matching the plug-in column lock pin, the lock pin holder is arranged adjacent to the plug-in hole, and when the plug-in column is connected to the plug-in hole, the plug-in column lock pin is engaged in the lock pin socket.

[0017] Optionally, the maintenance platform further includes a guardrail locking pin, which is movably connected between adjacent guardrail units.

[0018] Furthermore, the maintenance platform also includes a steel cable, a first end of the steel cable is detachably connected to the wheel hub, a second end of the steel cable is detachably connected to an end of the second bottom plate facing away from the first bottom plate, and the first end is located above the second end.

[0019] In another aspect of the present disclosure, a hub assembly for a wind turbine generator set is provided, the hub assembly comprising a hub and the maintenance platform as described above, wherein the maintenance platform is detachably connected to a manhole of the hub.

[0020] In another aspect of the present disclosure, a wind turbine generator set is provided, comprising the hub assembly as described above.

[0021] The maintenance platform, the hub assembly for a wind turbine generator set and the wind turbine generator set provided by the present invention have at least the following beneficial effects: the maintenance platform provided by the present invention comprises a bracket and a first base plate, the bracket can be fixed on the side wall of the hub at the manhole, and the bracket can extend axially along the manhole to the outside of the hub, the first base plate is movably connected to the bracket so as to be able to move outside the hub, the first base plate can be used to carry operators for hub maintenance, without the need to additionally build a lifting basket or a fixed platform, thereby reducing the operation and maintenance costs of the hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A structural diagram of a maintenance platform assembled on a wheel hub is provided for an exemplary embodiment of the present disclosure.

[0024] Figure 2 for Figure 1 Another perspective of the structural diagram of the maintenance platform.

[0025] Figure 3for Figure 1 Structural diagram of the maintenance platform assembled on the wheel hub.

[0026] Figure 4 for Figure 3 The structural diagram of the maintenance platform in .

[0027] Figure 5 for Figure 3 Schematic diagram of the partial structure of the maintenance platform.

[0028] Figure 6 for Figure 4 Partial structural diagram of the first base plate in FIG.

[0029] Figure 7 for Figure 6 An enlarged view of the partial structure of the base plate locking pin.

[0030] Figure 8 for Figure 7 Diagram of the base plate locking pin in the unlocked position.

[0031] Fig. 9 for Figure 7 Structural diagram of the base plate locking pin in the locked position.

[0032] Fig.10 for Figure 4 Structural diagram of the guardrail unit in .

[0033] Fig.11 for Fig.10 Structural diagram of the guardrail unit and the first base plate in the combined state.

[0034] Fig.12 for Fig.10 Structural diagram of the guardrail unit and guardrail locking pin in the combined state.

[0035] Fig.13 for Figure 5 Structural diagram of the steel cable.

[0036] Description of reference numerals:

[0037] 1. Maintenance platform; 2. Wheel hub;

[0038] 3. Manhole; 11. Bracket;

[0039] 12. First bottom plate; 13. Second bottom plate;

[0040] 14. Steel cable; 15. Guardrail unit;

[0041] 16. Bottom plate locking pin; 17. Return spring;

[0042] 18. Lifting ring; 19. Hinge;

[0043] 111. a first guide member; 112. a second guide member;

[0044] 121, receiving hole; 131, pin hole;

[0045] 141. Steel cable body; 142. Hook;

[0046] 151. Plug-in column; 152. Plug-in column lock pin;

[0047] 153. Guardrail pin hole; 154. Lock pin holder;

[0048] 155. guardrail locking pin; 161. connecting part;

[0049] 162. Locking portion; 163. Connecting portion. DETAILED DESCRIPTION

[0050] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present disclosure is limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0051] In one aspect of the present disclosure, a maintenance platform 1 for a hub 2 of a wind turbine generator set is provided. The maintenance platform 1 can be installed on the hub 2. When the wind turbine generator set needs to be inspected and maintained, an operator can use the maintenance platform 1 to get outside the hub 2 to facilitate the inspection and maintenance of the wind turbine generator set, but the present invention is not limited to this.

[0052] Reference Figures 1 to 13 An exemplary embodiment of the present disclosure provides a maintenance platform 1, which is suitable for a hub 2 of a wind turbine generator set. The maintenance platform 1 includes a bracket 11 and a first base plate 12. The bracket 11 is used to be connected to the wall of a manhole 3 of the hub 2. The bracket 11 includes a first guide member 111 extending along the axial direction of the manhole 3 to the outside of the hub 2; the first base plate 12 is movably connected to the bracket 11 along the axial direction of the manhole 3, and the first base plate 12 includes a second guide member 112 matching the first guide member 111. The second guide member 112 can move relative to the first guide member 111 to drive the first base plate 12 to move relative to the bracket 11.

[0053] The maintenance platform 1 provided by the present disclosure includes a bracket 11 and a first bottom plate 12. The bracket 11 can be fixed on the side wall of the hub at the manhole 3, and the bracket 11 can extend to the outside of the hub 2 along the axial direction of the manhole 3. The first bottom plate 12 is movably connected to the bracket 11 so as to be able to move to the outside of the hub 2. The first bottom plate 12 can be used to carry operators for repairing the hub 2, without the need to build an additional lifting basket or fixed platform, thereby reducing the operation and maintenance cost of the hub. When the hub 2 of the wind turbine generator set needs to be repaired, the bracket 11 can be installed at the manhole 3 of the hub 2, and then the first bottom plate 12 can be moved relative to the bracket 11, so that the first bottom plate 12 is moved from the inside of the hub 2 to the outside of the hub 2. The maintenance platform 1 has a simple structure and is easy to install. The operator can come to the first bottom plate 12 from the inside of the hub 2 through the manhole 3, which is convenient for the operator to repair the outer parts of the hub 2 and reduce the operation and maintenance cost of the hub 2.

[0054] The bracket 11 provided in this embodiment is detachably connected to the manhole 3 of the wheel hub 2, so that when the wheel hub 2 needs to be repaired, the operator can install the wheel hub 2 at an appropriate position as needed, but not limited to this. In addition, as needed, the bracket 11 can be pre-installed at the manhole 3 of the wheel hub 2, thereby improving the on-site assembly efficiency of the maintenance platform 1 and further reducing the operation and maintenance cost of the wheel hub 2, but not limited to this. Optionally, in the maintenance platform 1 provided in this embodiment, the first bottom plate 12 can be pre-installed on the bracket 11. When the bracket 11 is installed at an appropriate position, the first bottom plate 12 is moved relative to the bracket 11 so that the first bottom plate 12 is moved outside the wheel hub 2, thereby reducing the time for on-site assembly and further improving the operation and maintenance cost of the wheel hub 2, but not limited to this. As needed, the bracket 11 can be first installed on the wheel hub 2, and then the first bottom plate 12 can be connected to the bracket 11.

[0055] The bracket 11 provided in the present disclosure may include a pair of first guide members 111, and second guide members matching the first guide members 111 are respectively provided on both sides of the width direction of the first bottom plate 12, and the second guide members 112 move relative to the first guide members 111, thereby driving the first bottom plate 12 to move relative to the bracket 11. As an example, one of the first guide member 111 and the second guide member 112 is a slide rail, and the other is a slider matching the slide rail.

[0056] As needed, a shift block or a shift pin is provided on the bracket 11. After the first base plate 12 moves to a suitable position relative to the bracket 11, the shift block or the shift pin can limit the first base plate 12 to prevent accidental movement of the first base plate 12 relative to the bracket 11, thereby further improving the reliability of the maintenance platform 1.

[0057] In order to further improve the ease of use of the maintenance platform 1, the present invention discloses an exemplary embodiment, the maintenance platform 1 also includes a pair of second bottom plates 13, and the pair of second bottom plates 13 are rotatably connected to both sides of the width direction of the first bottom plate 12, so that the second bottom plates 13 are located in a folded position and an unfolded position relative to the first bottom plate 12. When the second bottom plate 13 is in the folded position, the second bottom plate 13 is stacked above the first bottom plate 12, and when the second bottom plate 13 is in the unfolded position, the second bottom plate 13 is located on one side of the width direction of the first bottom plate 12.

[0058] The first bottom plate 12 and the second bottom plate 13 provided in the present disclosure are formed into a rotatable connection, so that the second bottom plate 13 can be flipped and folded relative to the first bottom plate 12. When the second bottom plate 13 is flipped and folded on the first bottom plate 12, the second bottom plate 13 is in a folded position. At this time, the first bottom plate 12 and the second bottom plate 13 are small in the width direction of the manhole 3, which facilitates the movement of the first bottom plate 12 relative to the bracket 11 and avoids the second bottom plate 13 from interfering with the movement of the wheel hub 2. After the first bottom plate 12 moves to a suitable position relative to the bracket 11, the second bottom plate 13 can be flipped relative to the first bottom plate 12 so that the second bottom plate 13 is in an unfolded position. At this time, both the first bottom plate 12 and the second bottom plate 13 can be used to carry operators, thereby increasing the manned area of ​​the maintenance platform 1.

[0059] The maintenance platform 1 provided by the present disclosure includes a first bottom plate 12 and a second bottom plate 13 that can rotate relative to each other. When the second bottom plate 13 is in a folded position relative to the first bottom plate 12, it is convenient to carry and move the maintenance platform 1, thereby improving the convenience of using the maintenance platform 1. When the second bottom plate 13 is in an unfolded position relative to the first bottom plate 12, the manned area of ​​the maintenance platform 1 is increased, thereby improving the convenience of using the maintenance platform 1.

[0060] As an example, in order to facilitate the two second bottom plates 13 located on both sides of the first bottom plate 12 to be flipped and stacked on the first bottom plate 12, a heightening step is provided at the first end in the width direction of the first bottom plate 12, and the second bottom plate 13 is rotatably connected to the heightening step. After the second bottom plate 13 located at the second end is flipped and stacked on the first bottom plate 12, the second bottom plate 13 located at the first end will be flipped and stacked on the second bottom plate 13 hinged at the second end. In this way, the two second bottom plates 13 can be flipped and stacked on the first bottom plate 12, which is convenient for carrying.

[0061] As an example, the first bottom plate 12 and the second bottom plate 13 have substantially the same structure, and the first bottom plate 12 will be used as an example for description. The first bottom plate 12 includes a frame structure and a support plate disposed above the frame structure. The frame structure can be formed by welding aluminum alloy rectangular tubes, and the support plate can be composed of an aluminum alloy anti-slip patterned plate. The support plate can be welded to the frame structure, but is not limited thereto. The support plate can also be connected to the frame structure by fasteners as needed. The frame structure and the support plate of the first bottom plate 12 are respectively made of aluminum alloy materials, have high structural strength, and are low in weight, which is easy to carry, thereby further improving the ease of use of the maintenance platform 1.

[0062] In order to reduce the weight of the first bottom plate 12, the frame structure may be made by welding a hollow structure, but is not limited thereto.

[0063] Reference Figure 8 and Fig. 9 In this embodiment, the first bottom plate 12 and the second bottom plate 13 are connected via a hinge 19, for example but not limited to, the hinge 19 includes a hinge.

[0064] Reference Figures 6 to 9 In order to further improve the reliability of the maintenance platform 1, the maintenance platform 1 also includes a bottom plate locking pin 16. The bottom plate locking pin 16 has a U-shaped structure. The bottom plate locking pin 16 includes a connecting portion 161 and a locking portion 162 that are arranged at intervals, and the connecting portion 161 is rotatably connected to the first bottom plate 12. The second bottom plate 13 is provided with a pin hole 131 that matches the locking portion 162. When the second bottom plate 13 is in the unfolded position, the locking portion 162 can be inserted into the pin hole 131, so that the second bottom plate 13 is locked in the unfolded position.

[0065] Continuing to refer to the accompanying drawings, the first bottom plate 12 is provided with a connecting hole and a receiving hole 121. As an example, the connecting hole and the receiving hole 121 are both provided on the frame structure, but this is not limited to this. The connecting hole and the receiving hole 121 are arranged at intervals, and the connecting portion 161 is rotatably provided in the connecting hole. As an example, the connecting portion 161 is provided with an external thread, and the connecting portion 161 is locked in the connecting hole by means of a nut to prevent the bottom plate locking pin 16 from being separated from the first bottom plate 12. When the locking portion 162 is inserted into the receiving hole 121, the bottom plate locking pin 16 is located in the unlocking position, and the second bottom plate 13 is provided with a pin hole 131. When the locking portion 162 is inserted into the pin hole 131, the bottom plate locking pin 16 is located in the locking position. As an example, the pin hole 131 is provided on the frame structure of the second bottom plate 13, but this is not limited to this.

[0066] In this embodiment, the connecting portion 161 is rotatably connected to the connecting hole, and the bottom plate locking pin 16 can rotate around the connecting portion 161 between a locked position and an unlocked position. When the bottom plate locking pin 16 is in the unlocked position, the locking portion 162 is inserted into the storage hole 121, and the second bottom plate 13 can be flipped relative to the first bottom plate 12; when the second bottom plate 13 is in the unfolded position, the locking portion 162 can be inserted into the pin hole 131, and the bottom plate locking pin 16 is in the locked position.

[0067] In this embodiment, the connection portion 161 is rotatably connected to the connection hole. In the initial state, the locking portion 162 is inserted into the receiving hole 121, and the second bottom plate 13 can be flipped relative to the first bottom plate 12. When the bottom plate locking pin 16 needs to be changed from the unlocked position to the locked position, the bottom plate locking pin 16 can be pulled upward relative to the first bottom plate 12, and the locking portion 162 can be disengaged from the receiving hole 121. The bottom plate locking pin 16 is rotated to rotate around the connection portion 161, and the locking portion 162 can be moved to the top of the pin hole 131, and the locking portion 162 is inserted into the pin hole 131. At this time, the bottom plate locking pin 16 is in the locked position.

[0068] Continue to refer to Figure 6 and Figure 7 In order to further improve the reliability of the maintenance platform 1 and prevent the locking portion 162 from accidentally detaching from the pin hole 131, the maintenance platform 1 further includes a return spring 17, which is sleeved on the outer peripheral side of the connecting portion 161 and compressed in the connecting hole. In the initial state of the bottom plate locking pin 16, under the spring force of the return spring 17, the locking portion 162 can reliably stay in the receiving hole 121. When the base plate locking pin 16 needs to be changed from the unlocked position to the locked position, the base plate locking pin 16 is pulled upward relative to the first base plate 12 to overcome the spring force of the reset spring 17, so that the reset spring 17 is further compressed until the locking portion 162 leaves the receiving hole 121, and the base plate locking pin 16 is rotated until the locking portion 162 can move to the top of the pin hole 131. The external force is removed and the locking portion 162 will be inserted into the pin hole 131 under the action of the reset spring 17. Due to the action of the reset spring 17, the locking portion 162 is reliably retained in the pin hole 131, thereby improving the reliability of the maintenance platform 1.

[0069] Further, in order to facilitate the lifting of the bottom plate locking pin 16, the bottom plate locking pin 16 further includes a connecting portion 163 connected between the connecting portion 161 and the locking portion 162, and the maintenance platform 1 further includes a lifting ring 18, which is rotatably arranged on the connecting portion 163. When the bottom plate locking pin 16 needs to be changed from the unlocking position to the locking position, the operator can lift the lifting ring 18. As an example, a pull ring connection hole is provided at the top of the connecting portion 163, and the lifting ring 18 is annular and is inserted into the pull ring connection hole, but it is not limited thereto.

[0070] The maintenance platform 1 provided by the present disclosure has a second bottom plate 13 that can be flipped and folded relative to the first bottom plate 12. When the second bottom plate 13 is in an unfolded position relative to the first bottom plate 12, the connecting portion 161 of the bottom plate locking pin 16 is connected to the first bottom plate 12, and the locking portion 162 is connected to the second bottom plate 13. In this way, the second bottom plate 13 and the first bottom plate 12 are locked in the unfolded position by the bottom plate locking pin 16, thereby improving the reliability of the maintenance platform 1.

[0071] Reference Figures 1 to 5 ,as well as Figures 10 to 12 In order to improve the safety of aerial work, the maintenance platform 1 further includes a guardrail unit 15, which is detachably connected to the first bottom plate 12 and / or the second bottom plate 13. When the maintenance platform 1 is installed on the wheel hub 2, the guardrail unit 15 is arranged on the side of the first bottom plate 12 and the second bottom plate 13 away from the wheel hub 2, and the operator can stand on the first bottom plate 12 and the second bottom plate 13, and is located in the space enclosed by the guardrail unit 15 and the wheel hub 2, thereby improving the safety of the operator.

[0072] In order to facilitate assembly and improve the efficiency of assembly and disassembly of the maintenance platform 1 , the guardrail unit 15 is configured to be detachably connected to the first base plate 12 or the second base plate 13 .

[0073] Reference Fig.10 and Fig.11 Specifically, a plug-in column 151 is set at the bottom of the guardrail unit 15, and the outer peripheral edges of the first bottom plate 12 and the second bottom plate 13 are provided with plug-in holes matching the plug-in column 151. When the plug-in column 151 is inserted into the plug-in hole, the guardrail unit 15 is connected to the first bottom plate 12 and / or the second bottom plate 13.

[0074] In the present invention, the plug-in column 151 at the bottom of the guardrail unit 15 can be inserted into the plug-in hole, so that the guardrail unit 15 can be connected to the first base plate 12 and the second base plate 13. The plug-in column 151 and the plug-in hole are detachably connected, the structure is simple, and the guardrail unit 15 is easy to install.

[0075] As required, the first bottom plate 12 is provided with a plurality of plug holes on its frame structure along its circumference, but not limited thereto.

[0076] In order to further improve the reliability of the maintenance platform 1, the maintenance platform 1 also includes a column locking pin 152, which is movably connected to the plug-in column 151. The column locking pin 152 can protrude outward relative to the outer peripheral wall of the plug-in column 151. When the plug-in column 151 is connected to the plug-in hole, the column locking pin 152 protrudes outward relative to the plug-in column 151 to be clamped on the first bottom plate 12 and / or the second bottom plate 13 where the plug-in hole is located.

[0077] The maintenance platform 1 provided by the present invention, when the plug-in column 151 is set in the plug-in hole, the plug-in column locking pin 152 can be connected to the plug-in column 151 and the first bottom plate 12 or the second bottom plate 13 where the plug-in column 151 is located, thereby avoiding the plug-in column 151 from accidentally disengaging from the first bottom plate 12 or the second bottom plate 13, and avoiding the guardrail unit 15 from accidentally disengaging from the first bottom plate 12 or the second bottom plate 13, thereby improving the reliability of the maintenance platform 1.

[0078] Continue to refer to Fig.11 The plug-in column lock pin 152 is pluggably arranged on the plug-in column 151, and the first base plate 12 and the second base plate 13 are provided with a lock pin holder 154, the lock pin holder 154 is arranged adjacent to the plug-in hole, and the lock pin holder 154 is provided with a lock pin plug hole matching the plug-in column lock pin 152. When the plug-in column 151 is connected to the plug-in hole, the plug-in column lock pin 152 is clamped in the lock pin plug hole.

[0079] In this embodiment, the plug-in column 151 is provided with a through hole matching the plug-in column locking pin 152. When the plug-in column locking pin 152 is arranged in the through hole, both ends protrude from the outer peripheral wall of the plug-in column 151 respectively, and one end of the plug-in column locking pin 152 can be inserted into the locking pin insertion hole of the locking pin holder 154, so that the plug-in column 151 can be inserted into the plug-in column 151 and the locking pin holder 154 at the same time, so that the plug-in column 151 can be connected to the first base plate 12 or the second base plate 13 where the locking pin holder 154 is located, thereby improving the connection reliability of the guardrail unit 15.

[0080] As an example, a pull ring is provided at the first end of the plunger lock pin 152 to facilitate the operator to grasp it, and the second end of the plunger lock pin 152 can be inserted into the lock pin holder 154, but this is not limited to it.

[0081] Optionally, the plug column locking pin 152 can be a spring pin (not shown), which is arranged on the plug column 151 and can protrude outward or retract inward relative to the outer peripheral wall of the plug column 151. When the plug column 151 is connected to the plug hole, the spring pin is engaged in the plug hole.

[0082] In this embodiment, the plug-in column locking pin 152 can be pre-installed on the plug-in column 151, and in the initial state, the plug-in column locking pin 152 can be set to protrude outward relative to the side wall of the plug-in column 151. During the process of inserting the plug-in column 151 into the plug-in hole, the plug-in column locking pin 152 is squeezed and retracted inward relative to the plug-in column 151. Since the frame structure is a hollow tube structure, the plug-in column locking pin 152 protrudes outward again relative to the plug-in column 151 under the action of the reset spring and is stuck in the frame structure.

[0083] Reference Fig.12In order to further improve the reliability of the maintenance platform 1, the maintenance platform 1 also includes a guardrail locking pin 155, which is movably connected between adjacent guardrail units 15. As an example, the guardrail units 15 are provided with guardrail pin holes 153 for connecting the guardrail locking pins 155 on both sides along the width direction of the first bottom plate 12. After the guardrail units 15 are assembled on the first bottom plate 12, the guardrail locking pins 155 can be inserted into the guardrail pin holes 153 of two adjacent guardrail units 15, thereby connecting the two guardrail units 15 together, thereby improving the connection reliability of the maintenance platform 1. As needed, multiple guardrail pin holes 153 can be provided on both sides of the width direction of the same guardrail unit 15, and the multiple guardrail pin holes 153 are arranged at intervals along the height direction of the guardrail unit 15, thereby further improving the connection reliability between adjacent guardrail units 15.

[0084] Continue to refer to Fig.10 The guardrail unit 15 includes a frame structure formed by cold bending and welding of an aluminum alloy tube, and an aluminum alloy perforated plate is welded on the frame structure to block the line of sight and provide protection, but the invention is not limited thereto.

[0085] Reference Figure 5 and Fig.13 In order to further improve the reliability of the maintenance platform 1, the maintenance platform 1 also includes a steel cable 14, a first end of the steel cable 14 is detachably connected to the hub 2, a second end of the steel cable 14 is detachably connected to the end of the second base plate 13 away from the first base plate 12, and the first end is located above the second end.

[0086] As an example, the steel cable 14 includes a steel cable body 141 and hooks 142 arranged at both ends of the steel cable body 141. A shackle (not shown) is arranged on the wheel hub 2. The hook 142 located at the first end of the steel cable 14 can be hooked on the shackle, and the hook 142 located at the second end of the steel cable 14 can be hooked on the end of the frame structure of the second base plate 13, so that the second base plate 13 is reliably connected to the wheel hub 2, thereby improving the bearing capacity of the second base plate 13 and improving the reliability of the maintenance platform 1.

[0087] In order to improve the versatility of the maintenance platform 1, the steel cable body 141 may include a plurality of detachable steel cable units. The assembly or disassembly of the plurality of steel cable units may adjust the length of the steel cable body 141 as needed, thereby making the steel cable 14 have good versatility.

[0088] In this embodiment, the second bottom plates 13 are respectively disposed at both ends of the first bottom plate 12 in the width direction. To facilitate the second bottom plate 13 to be stacked on top of the first bottom plate 12, the second bottom plate 13 located at the first end of the first bottom plate 12 is directly stacked on the first bottom plate 12, and the second bottom plate 13 located at the second end of the first bottom plate 12 is stacked on top of the second bottom plate 13 located at the first end. Specifically, a height-increasing load-bearing rectangular tube is disposed at the second end of the first bottom plate 12, and the second bottom plate 13 located at the second end of the first bottom plate 12 is hinged on the height-increasing load-bearing rectangular tube, so that the two second bottom plates 13 are folded and disposed above the first bottom plate 12.

[0089] In order to improve the portability of the maintenance platform 1, handles are provided on both sides of the width direction of the frame structure of the first bottom plate 12, for example but not limited to, the handles can be provided on the heightened steps. As an example, the heightened steps can be heightened load-bearing torque tubes, but not limited thereto.

[0090] The assembly process of the maintenance platform 1 provided by the present disclosure is roughly as follows:

[0091] First, the impeller is locked into a positive Y shape, and the maintenance platform 1 is in a folded state and is transported into the hub 2 by the operator;

[0092] The bracket 11 is mounted on the wall of the manhole 3 of the wheel hub 2, and the maintenance platform 1 in the folded state pushes the first bottom plate 12 relative to the bracket 11 until the first bottom plate 12 moves from the inside of the wheel hub 2 to the outside of the wheel hub 2. When the first bottom plate 12 is in a proper position, the first bottom plate 12 is stopped to prevent the first bottom plate 12 from sliding relative to the bracket 11, thereby improving the reliability of the maintenance platform 1.

[0093] The second bottom plate 13 is flipped relative to the first bottom plate 12 in the wheel hub 2 until the second bottom plate 13 is in a folded position, and the second bottom plate 13 is locked by means of the bottom plate locking pin 16. At this time, the operator wearing safety protection equipment can reach the maintenance platform 1 through the manhole 3;

[0094] Connect two steel cables 14 to predetermined positions between the second bottom plate 13 and the hub 2 and pre-tighten the steel cables 14;

[0095] The operator assembles and positions the guardrail unit 15, for example but not limited to, assembling the guardrail unit 15 on the first base plate 12 and the second base plate 13, and connecting adjacent guardrail units 15 together with the help of the guardrail locking pin 155, thereby completing the assembly of the maintenance platform 1. The maintenance platform 1 has a simple structure, and the second base plate 13 is easy to flip and fold relative to the first base plate 12. When the second base plate 13 is in a folded state, the maintenance platform 1 is easy to assemble and move, thereby improving the assembly efficiency of the maintenance platform 1 and reducing the operation and maintenance cost of the wheel hub 2.

[0096] After the operator completes the inspection and repair of the wheel hub 2, the maintenance platform 1 can be dismantled. The specific disassembly process is the reverse process of the above-mentioned assembly process.

[0097] In another aspect of the present disclosure, a hub assembly is provided, which is applicable to a wind turbine generator set. The hub assembly includes a hub 2 and a maintenance platform 1 as described above. The maintenance platform 1 is detachably connected to a manhole 3 of the hub 2 .

[0098] In another aspect of the present disclosure, a wind turbine generator set is provided, comprising the hub assembly as described above.

[0099] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0100] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0101] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0102] The features, structures or characteristics described in the present disclosure may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A maintenance platform, characterized in that: Applicable to a hub (2) of a wind turbine generator set, the maintenance platform (1) comprising: A bracket (11) used for connecting to the wall of the manhole (3) of the wheel hub (2), the bracket (11) comprising a first guide member (111) extending along the axial direction of the manhole (3) to the outside of the wheel hub (2); A first base plate (12) is movably connected to the bracket (11) along the axial direction of the manhole (3); the first base plate (12) comprises a second guide member (112) matching the first guide member (111); the second guide member (112) is movable relative to the first guide member (111) to drive the first base plate (12) to move relative to the bracket (11).

2. The maintenance platform according to claim 1, characterized in that: The maintenance platform (1) further comprises a pair of second bottom plates (13), the pair of second bottom plates (13) being rotatably connected to both sides of the first bottom plate (12) in the width direction, so that the second bottom plates (13) are located in a folded position and an unfolded position relative to the first bottom plate (12); when the second bottom plate (13) is in the folded position, the second bottom plate (13) is stacked above the first bottom plate (12); when the second bottom plate (13) is in the unfolded position, the second bottom plate (13) is located on one side of the first bottom plate (12) in the width direction.

3. The maintenance platform according to claim 2, characterized in that: The maintenance platform (1) further comprises a base plate locking pin (16), the base plate locking pin (16) being of a U-shaped structure, the base plate locking pin (16) comprising a connecting portion (161) and a locking portion (162) arranged at intervals, and the connecting portion (161) is rotatably connected to the first base plate (12), the second base plate (13) being provided with a pin hole (131) matching the locking portion (162), and when the second base plate (13) is in the unfolded position, the locking portion (162) can be inserted into the pin hole (131), so that the second base plate (13) is locked in the unfolded position.

4. The maintenance platform according to claim 3, characterized in that: The first bottom plate (12) is provided with a connecting hole and a receiving hole (121); the connecting portion (161) is rotatably connected to the connecting hole so as to be rotated between a locking position and an unlocking position; when the bottom plate locking pin (16) is located at the unlocking position, the locking portion (162) is inserted into the receiving hole (121); when the second bottom plate (13) is in the unfolded position, the locking portion (162) can be inserted into the pin hole (131), and at this time, the bottom plate locking pin (16) is located at the locking position.

5. The maintenance platform according to claim 4, characterized in that: The maintenance platform (1) further comprises a return spring (17), wherein the return spring (17) is sleeved on the outer peripheral side of the connecting portion (161) and compressed in the connecting hole.

6. The maintenance platform according to claim 3, characterized in that: The base plate locking pin (16) further includes a connecting portion (163) connected between the connecting portion (161) and the locking portion (162), and the maintenance platform (1) further includes a lifting ring (18), and the lifting ring (18) is rotatably arranged on the connecting portion (163).

7. The maintenance platform according to any one of claims 2 to 5, characterized in that: The maintenance platform (1) further comprises a guardrail unit (15), wherein the guardrail unit (15) is detachably connected to the first base plate (12) and / or the second base plate (13).

8. The maintenance platform according to claim 7, characterized in that: A plug-in column (151) is arranged at the bottom of the guardrail unit (15), and plug-in holes matching the plug-in column (151) are arranged at the outer peripheral edges of the first bottom plate (12) and the second bottom plate (13). When the plug-in column (151) is inserted into the plug-in hole, the guardrail unit (15) is connected to the first bottom plate (12) and / or the second bottom plate (13).

9. The maintenance platform according to claim 8, characterized in that: The maintenance platform (1) further comprises a plug-in column locking pin (152), wherein the plug-in column locking pin (152) is movably connected to the plug-in column (151), and the plug-in column locking pin (152) can protrude outward relative to the outer peripheral wall of the plug-in column (151). When the plug-in column (151) is connected to the plug-in hole, the plug-in column locking pin (152) protrudes outward relative to the plug-in column (151) to be clamped on the first bottom plate (12) and / or the second bottom plate (13) where the plug-in hole is located.

10. The maintenance platform according to any one of claims 2 to 5, characterized in that: The maintenance platform (1) further comprises a steel cable (14), a first end of the steel cable (14) being detachably connected to the wheel hub (2), a second end of the steel cable (14) being detachably connected to an end of the second base plate (13) facing away from the first base plate (12), and the first end being located above the second end.

11. A hub assembly for a wind turbine generator set, characterized in that: The wheel hub assembly comprises a wheel hub and a maintenance platform as described in any one of claims 1 to 10, wherein the maintenance platform is detachably connected to a manhole of the wheel hub.

12. A wind turbine generator set, characterized in that: Comprising the hub assembly as claimed in claim 11.

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