Combined lifting appliance for maintenance on gearbox tower of wind generating set

Abstract

The utility model discloses an on-tower maintenance combined lifting appliance for a gearbox of a wind generating set, which comprises a first lifting appliance structure, a second lifting appliance structure and a monorail pulley, the first lifting appliance structure comprises two groups of first support structures and two groups of second support structures, the height of the support structures is adjustable, and the monorail pulley is arranged on the first support structures. The four sets of supporting structures are arranged at the four vertex angle positions in the rectangular direction, and the two same sets of supporting structures are symmetrically arranged. The two groups of first longitudinal beams are arranged in parallel, and each group of first longitudinal beams is fixed on one group of first supporting structure and second supporting structure. According to the utility model, the combined lifting appliance is replaced on the tower and matched with the construction scheme, and the combined lifting appliance and accessories thereof are mounted in the cabin, so that the medium-speed shaft part and the high-speed shaft part of the gearbox in the 2MW wind generating set can be hoisted and replaced in the cabin, and an external crane is not needed to open a cabin cover for hoisting.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generators, in particular to a gear box tower maintenance combined hoist for a wind turbine generator set. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current.

[0003] The gearbox of the 2MW wind turbine generator set of Shangdian often suffers from gear damage or broken teeth failure and bearing damage during operation. Due to structural limitations, the diameter of the medium-speed large gear is larger than the diameter of the downwind bearing hole, so the medium-speed large gear cannot be removed from the gearbox without opening the box. The applicant has previously applied for a Chinese utility model patent, and the patent announcement number is CN217735661 U, named as a gearbox tower unpacking tool for a wind turbine generator set, "disconnect and fix the rear box body of the gearbox from the gear ring, separate the rear upper box body, first use at least 4 hand chain hoists on the first beam and the second beam to pull up the rear upper box body, and then use the remaining at least 4 hand chain hoists on the first beam and the second beam to translate the rear upper box body to one side of the nacelle. Each hand chain hoist fixes the rear upper box body to one side of the nacelle with force. With the cooperation of the electric hoist and multiple hand chain hoists, transfer the new medium-speed shaft system from the second longitudinal beam to the second beam and the third beam, and lower and install it in the gearbox. Move the rear upper box body to the top of the rear lower box body by the hand chain hoist and reinstall it in place. The gearbox unpacking and replacement of medium-speed shaft components and high-speed shaft components in the 2MW wind turbine generator set can be completed inside the nacelle, without the need to return the gearbox to the factory for repair or use an external crane to open the nacelle cover before unpacking and repairing."

[0004] However, when only the rear box end cover is removed, only the output shaft and the bearing component downwind of the output shaft can be replaced, which greatly reduces the maintenance effect. As a further optimization of the prior application, the applicant proposes a gearbox tower maintenance combined hoist for wind turbine generator sets. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problems mentioned in the above background technology and to propose a combined hanger for repairing the gear box tower of a wind turbine generator set.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A gearbox tower maintenance combined hoist for a wind turbine generator set comprises a first hoist structure, a second hoist structure and a monorail pulley, wherein the first hoist structure comprises:

[0008] Two groups of first support structures and two groups of second support structures, the height of the support structures is adjustable, the four groups of support structures are arranged at four vertex positions of a rectangular orientation, and the two identical groups of support structures are symmetrically arranged;

[0009] Two groups of first longitudinal beams are arranged in parallel, and each group of first longitudinal beams is fixed on a group of first supporting structures and a second supporting structure;

[0010] Three groups of first cross beams are arranged in parallel on the two groups of first longitudinal beams, and both ends of the first cross beams are fixedly connected to the first longitudinal beams on the corresponding sides;

[0011] The second sling structure comprises:

[0012] The third support structure and the fourth support structure are U-shaped structures, and the two groups of support structures are arranged front and back;

[0013] The second crossbeam and the third crossbeam are arranged in parallel, and two groups of the second crossbeams are fixed on the top of the third supporting structure, and the third crossbeams are fixed on the top of the fourth supporting structure;

[0014] a second longitudinal beam fixed to the second cross beam and the third cross beam;

[0015] At least one set of monorail pulleys is slidably mounted on each set of crossbeams;

[0016] The three groups of longitudinal beams and five groups of transverse beams are all I-beam structures.

[0017] As a further description of the above technical solution:

[0018] The first supporting structure and the second supporting structure both include:

[0019] The first connecting seat is a disc-shaped structure;

[0020] a first support column;

[0021] A second support column, the first support column is slidably sleeved in the second support column;

[0022] The first base is an inclined support structure, and the first base is fixedly connected to the bottom of the second support column;

[0023] The clamp is a split-type circular ring structure, and the inner walls of the two sets of circular rings are provided with a clamping groove for clamping with the second support column, and the two sets of circular rings are fixedly connected to the two sets of support columns by bolts;

[0024] A plurality of reinforcing ribs are fixedly connected between the first connecting seat and the first supporting column, and between the second supporting column and the first base.

[0025] As a further description of the above technical solution:

[0026] The second supporting structure further includes a fourth connecting seat, and the fourth connecting seat is used to connect the first longitudinal beam and the first connecting seat on the second supporting structure.

[0027] As a further description of the above technical solution:

[0028] The first longitudinal beam includes a longitudinal beam body and a second connecting seat, the second connecting seat is a disc-shaped structure, the second connecting seat is welded on both sides of the bottom of the longitudinal beam body, and the second connecting seat is fixedly connected to the fourth connecting seat and the first connecting seat on the second supporting structure.

[0029] As a further description of the above technical solution:

[0030] The third supporting structure and the fourth supporting structure both include:

[0031] Two groups of third support columns and two groups of fourth support columns, both ends of the four groups of support columns are fixedly connected with fifth connection seats, the fifth connection seat at the bottom of the third support column is fixedly connected to the fifth connection seat at the top of the fourth support column, and the fifth connection seat at the top of the third support column is fixedly connected to the corresponding second beam or the third beam;

[0032] The gantry base, the top two sides of which are fixedly connected to the fifth connecting seat at the bottom of the fourth supporting column.

[0033] As a further description of the above technical solution:

[0034] The second cross beam and the third cross beam are both welded with third connecting seats at both ends of their bottoms, and the third connecting seats are fixedly connected to the fifth connecting seat at the top of the third support column.

[0035] As a further description of the above technical solution:

[0036] The three groups of longitudinal beams, the five groups of transverse beams, the first connecting seat and the second connecting seat are all provided with waist-shaped grooves for adjusting the connection position.

[0037] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0038] 1. In the utility model, by designing a tower replacement combined lifting device and cooperating with the construction plan, the combined lifting device and its accessories are installed inside the nacelle, so that the lifting and replacement of the medium-speed shaft component and the high-speed shaft component of the gear box in the 2MW wind turbine generator set can be completed in the nacelle, without the need to use an external crane to open the nacelle cover for lifting.

[0039] 2. In the present utility model, the combined hoist structure has 8 supporting structures, 3 longitudinal beams, 5 transverse beams, 6 monorail pulley assemblies, 2 gantry bases, 1 electric hoist, and is equipped with bolts, hand hoists, hoisting ropes, etc. The first hoist structure is the hoisting part of the box body, and its main function is the hoisting of the rear box body of the gearbox when it is separated and reinstalled; the second hoist structure is the shaft lifting part, and its main function is the lifting and transfer of the medium-speed shaft system and the high-speed shaft system.

[0040] 3. In the utility model, the support structure height and the positions of the crossbeams and longitudinal beams of the combined hoist can be flexibly adjusted according to the internal space structure of the cabin; a monorail pulley is added to reduce the labor intensity of maintenance personnel in lifting and transferring the box and gear components, thereby improving work efficiency; the maintenance service response time is shortened: using this combined hoist to replace and repair the medium-speed shaft system on the tower of a 2MW unit, maintenance personnel only need to arrive with materials, tooling, and tools to go up the tower for maintenance, without waiting for the crane to enter the site; the operation and maintenance cost is reduced: the cost of renting a crane, leveling the road surface, etc. is saved; the safety risk is small: the maintenance work is completed inside the cabin throughout the process, and there is no need for an external crane to open the cabin cover, lift the box and the medium-speed shaft system, and other high-altitude open-air operations, which greatly reduces the safety risk; the cabin cover does not need to be opened during the maintenance process, so the maintenance personnel, equipment and lines in the cabin are not affected by severe weather such as rain, snow, and scorching sun; the requirements for roads, weather, and especially wind speed are relatively low (compared with on-site maintenance with a crane), and the construction period is highly controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the three-dimensional structure of a gearbox tower maintenance assembly hanger for a wind turbine generator set provided in accordance with an embodiment of the utility model is shown;

[0042] Figure 2 An exploded schematic diagram of a first supporting structure provided according to an embodiment of the utility model is shown;

[0043] Figure 3 An exploded schematic diagram of a second supporting structure provided according to an embodiment of the utility model is shown;

[0044] Figure 4 A schematic structural diagram of a first longitudinal beam provided according to an embodiment of the utility model is shown;

[0045] Figure 5 A schematic diagram of the structure of a first crossbeam provided according to an embodiment of the utility model is shown;

[0046] Figure 6 A partial structural schematic diagram of a second sling structure provided according to an embodiment of the utility model is shown;

[0047] Figure 7 A schematic diagram of the three-dimensional structure of a third supporting structure provided according to an embodiment of the utility model is shown;

[0048] Figure 8 A schematic diagram of the three-dimensional structure of a fourth supporting structure provided according to an embodiment of the utility model is shown.

[0049] Legend:

[0050] 1. First supporting structure; 11. First connecting seat; 12. First supporting column; 13. Second supporting column; 14. First base; 15. Clamp; 1501. Slot; 16. Reinforcing rib; 2. Second supporting structure; 21. Fourth connecting seat; 3. First longitudinal beam; 31. Longitudinal beam body; 32. Second connecting seat; 4. First cross beam; 5. Monorail pulley; 6. Third supporting structure; 7. Fourth supporting structure; 71. Third supporting column; 72. Fourth supporting column; 73. Fifth connecting seat; 74. Gantry base; 8. Second longitudinal beam; 9. Second cross beam; 10. Third cross beam; 18. Waist-shaped groove; 19. Third connecting seat. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] See also Figure 1-8 The utility model provides a technical solution: a gear box tower maintenance combined hanger for a wind turbine generator set, comprising a first hanger structure, a second hanger structure and a monorail pulley 5.

[0053] Among them, Figure 1 As shown, the first sling structure includes: two groups of first support structures 1 and two groups of second support structures 2, the height of the support structure is adjustable, the four groups of support structures are arranged at the four vertex positions of a rectangular orientation, and the two identical groups of support structures are symmetrically arranged.

[0054] Specifically, Figure 2-5As shown, the first support structure 1 and the second support structure 2 both include: a first connecting seat 11, which is a disc-shaped structure, a first support column 12 slidably sleeved in the second support column 13, a first base 14 which is an inclined support structure, the first base 14 is fixedly connected to the bottom of the second support column 13, and a clamp 15 which is a split-type circular ring-like structure, the inner walls of the two groups of circular rings are provided with a clamping groove 1501 which is clamped with the second support column 13, and the two groups of circular rings are fixedly connected to the two groups of support columns by bolts, and a plurality of reinforcing ribs 16 are fixedly connected between the first connecting seat 11 and the first support column 12, and between the second support column 13 and the first base 14. The telescopic length of the first support column 12 in the second support column 13 is adjusted, and the first support column 12 is fixed to the second support column 13 by the clamp 15, so as to realize the height adjustment of the first sling structure. As shown Figure 3 As shown, the second support structure 2 further includes a fourth connection seat 21, which is used to connect the first longitudinal beam 3 and the first connection seat 11 on the second support structure 2. Two groups of first longitudinal beams 3 are arranged in parallel, and each group of first longitudinal beams 3 is fixed on a group of first support structure 1 and second support structure 2. Three groups of first cross beams 4 are arranged in parallel on the two groups of first longitudinal beams 3, and the two ends of the first cross beams 4 are fixedly connected to the first longitudinal beams 3 on the corresponding side. Figure 4 and Figure 5 As shown, the first longitudinal beam 3 includes a longitudinal beam body 31 and a second connecting seat 32, the second connecting seat 32 is a disc-shaped structure, and the second connecting seats 32 are welded on both sides of the bottom of the longitudinal beam body 31, and the second connecting seat 32 is fixedly connected to the fourth connecting seat 21 and the first connecting seat 11 on the second supporting structure 2. The three groups of longitudinal beams and the five groups of cross beams are all I-beam structures. Two groups of monorail pulleys 5 are installed on the two groups of first cross beams 4 away from the second hoisting device structure, and a group of monorail pulleys 5 are installed on the third group of first cross beams 4. Hand hoists are installed on the five groups of monorail pulleys 5 on the first hoisting device structure. A group of monorail pulleys 5 are installed on the second longitudinal beam 8, and an electric hoist is installed on the group of monorail pulleys 5. The setting of the monorail pulleys 5 can reduce work intensity and improve the efficiency of lifting and transfer.

[0055] It should be noted that electric hoists and hand hoists are commonly used technical means in this field, so their specific structures are not described in detail here.

[0056] Among them, Figure 1 As shown, the second sling structure includes: a third support structure 6 and a fourth support structure 7, which are U-shaped structures, and the two groups of support structures are arranged front and back. Figure 6-8As shown, the third support structure 6 and the fourth support structure 7 both include: two groups of third support columns 71 and two groups of fourth support columns 72, both ends of the four groups of support columns are fixedly connected with the fifth connecting seat 73, the fifth connecting seat 73 at the bottom of the third support column 71 is fixedly connected to the fifth connecting seat 73 at the top of the fourth support column 72, the fifth connecting seat 73 at the top of the third support column 71 is fixedly connected to the corresponding second crossbeam 9 or the third crossbeam 10, the two sides of the top of the gantry base 74 are fixedly connected to the fifth connecting seat 73 at the bottom of the fourth support column 72, the second crossbeam 9 and the third crossbeam 10 are arranged in parallel, and the two groups of second crossbeams 9 are fixed on the top of the third support structure 6, the third crossbeam 10 is fixed on the top of the fourth support structure 7, the second crossbeam 9 and the third crossbeam 10 are welded with the third connecting seat 19 at both ends of the bottom, the third connecting seat 19 is fixedly connected to the fifth connecting seat 73 at the top of the third support column 71, and the second longitudinal beam 8 is fixed on the second crossbeam 9 and the third crossbeam 10.

[0057] Furthermore, if Figure 1-6 As shown, waist-shaped grooves 18 for adjusting the front-rear and left-right spatial connection positions are provided on the three groups of longitudinal beams, the five groups of transverse beams, the first connecting seat 11 and the second connecting seat 32 .

[0058] In addition, the combined sling structure has a kidney groove and the material is changed to aluminum alloy to reduce the weight of the device.

[0059] The combined lifting device structure has 8 supporting structures, 3 longitudinal beams, 5 cross beams, 6 monorail pulley components, 2 gantry bases, 1 electric hoist, and is equipped with bolts, hand hoists, lifting ropes, etc. Figure 1 The first hoisting structure is the hoisting part of the gearbox, and its main function is to lift the gearbox when the rear gearbox is detached and reinstalled; the second hoisting structure is the shaft lifting part, and its main function is to lift and transfer the medium-speed shaft and high-speed shaft, and increase the overall rigidity of the device.

[0060] This utility model designs a tower replacement combined hoist and cooperates with the construction plan, installs the combined hoist and its accessories inside the nacelle, and can complete the lifting and replacement of the medium-speed shaft components and high-speed shaft components of the gearbox in the 2MW wind turbine generator set in the nacelle. There is no need to use an external crane to open the nacelle cover for lifting, and compared with the existing technical solutions, it has the following advantages:

[0061] (1) The support structure height and the positions of the crossbeam and longitudinal beam of the combined sling can be flexibly adjusted according to the internal space structure of the cabin;

[0062] (2) Install a monorail pulley to reduce the labor intensity of maintenance personnel in lifting and transferring the box and gear parts, thereby improving work efficiency;

[0063] (3) Shortened maintenance service response time: When using this combined lifting device to replace and repair the medium-speed shaft system on the tower of a 2MW unit, maintenance personnel only need to arrive with materials, tooling, and tools to go up the tower for maintenance without waiting for the crane to enter the site;

[0064] (4) Reduced operation and maintenance costs: save on renting cranes, leveling roads, etc.;

[0065] (5) Low safety risk: The maintenance work is completed inside the engine room. There is no need for an external crane to open the engine room cover, lift the box and medium-speed shaft system, and other high-altitude open-air operations, which greatly reduces the safety risk.

[0066] (6) The engine room cover does not need to be opened during the maintenance process, so the maintenance personnel, equipment and lines in the engine room are not affected by bad weather such as rain, snow, and scorching sun;

[0067] (7) The requirements for roads, weather and especially wind speed are relatively low (compared to crane on-site maintenance), and the construction period is highly controllable.

[0068] Working Principle: To use, follow the steps below:

[0069] S1, stop and lock the fan, drain the lubricating oil in the gearbox, and remove the external parts and connecting wires of the gearbox that may affect the sub-box;

[0070] S2, hoist the parts of the combined lifting device into the engine room in sequence and complete the installation according to the process requirements;

[0071] S3, remove the medium speed end cover, high speed end cover, high speed shaft component, slip ring tube end cover and slip ring tube bearing from the gear box;

[0072] S4, remove the two bolts on the rear box cover near the horizontal position, install the tooling guide pin, then remove the bolts on the adjacent position of the guide pin, one on each side, install the tooling screw, and screw the nut on the screw. The nut does not need to be tightened (it is used to cooperate with the ejection bolts in the future, and the nut is withdrawn together to ensure that the rear box cover can be horizontally separated from the gearbox) to control the distance and speed of the box cover to be disengaged. Install the lifting ring and sling at the pre-selected lifting point on the box cover, and use the crane to tighten it (do not rule out the possibility of adding counterweight to the box cover);

[0073] S5, install the tooling ejector bolts on the rear box cover. At this time, the rear box cover ejector bolts and the nuts on the bolts installed in the bolt holes of the rear box cover in the previous step need to cooperate in advancing (ejector bolts advancing) and retreating (nuts retreating). Every time the box cover is disengaged a preset distance, tighten the ejector bolts of the bearing seat of the intermediate speed shaft component to prevent the intermediate speed shaft component from being disengaged with the rear box cover.

[0074] S6, after the medium-speed shaft system is removed from the box, use an electric hoist to transfer the medium-speed shaft system to the lifting port and lift it down from the nacelle through the combined lifting device, and then the new medium-speed shaft system can be lifted onto the nacelle;

[0075] S7, use the electric hoist and hand hoist on the combined lifting device to transfer the new medium-speed shaft system to the top of the gearbox and install it in place;

[0076] S9, move the rear upper box body fixed on the combined lifting device to the top of the rear lower box body and reinstall it in place;

[0077] S10, assemble the rear housing and the gear ring and reinstall other parts;

[0078] S11, dismantle the combined lifting device into parts and then hoist it down the tower;

[0079] S12, install the external accessories of the gearbox and add gearbox lubricating oil.

[0080] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gearbox tower maintenance combined hoist for a wind turbine generator set, characterized in that: The invention comprises a first sling structure, a second sling structure and a monorail pulley (5), wherein the first sling structure comprises: Two groups of first support structures (1) and two groups of second support structures (2), the height of the support structures is adjustable, the four groups of support structures are arranged at four vertex positions of a rectangular orientation, and the two identical groups of support structures are symmetrically arranged; Two groups of first longitudinal beams (3) are arranged in parallel, and each group of first longitudinal beams (3) is fixed on a group of first supporting structure (1) and second supporting structure (2); Three groups of first cross beams (4) are arranged in parallel on the two groups of first longitudinal beams (3), and two ends of the first cross beams (4) are fixedly connected to the first longitudinal beams (3) on the corresponding sides; The second sling structure comprises: The third support structure (6) and the fourth support structure (7) are U-shaped structures, and the two groups of support structures are arranged front and back; The second crossbeam (9) and the third crossbeam (10) are arranged in parallel, and the two sets of second crossbeams (9) are fixed on the top of the third supporting structure (6), and the third crossbeam (10) is fixed on the top of the fourth supporting structure (7); A second longitudinal beam (8) fixed on the second cross beam (9) and the third cross beam (10); At least one set of monorail pulleys (5) is slidably mounted on each set of cross beams; The three groups of longitudinal beams and five groups of transverse beams are all I-beam structures.

2. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 1, characterized in that: The first supporting structure (1) and the second supporting structure (2) both comprise: The first connecting seat (11) is a disc-shaped structure; A first support column (12); A second support column (13), wherein the first support column (12) is slidably sleeved in the second support column (13); The first base (14) is an inclined support structure, and the first base (14) is fixedly connected to the bottom of the second support column (13); The clamp (15) is a split-type circular ring-like structure, and the inner walls of the two groups of circular rings are provided with a clamping groove (1501) for clamping with the second support column (13), and the two groups of circular rings are fixedly connected to the two groups of support columns by bolts; A plurality of reinforcing ribs (16) are fixedly connected between the first connecting seat (11) and the first supporting column (12), and between the second supporting column (13) and the first base (14).

3. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 2, characterized in that: The second supporting structure (2) further comprises a fourth connecting seat (21), wherein the fourth connecting seat (21) is used to connect the first longitudinal beam (3) and the first connecting seat (11) on the second supporting structure (2).

4. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 3, characterized in that: The first longitudinal beam (3) comprises a longitudinal beam body (31) and a second connecting seat (32); the second connecting seat (32) is a disc-shaped structure; the second connecting seat (32) is welded on both sides of the bottom of the longitudinal beam body (31); the second connecting seat (32) is fixedly connected to the fourth connecting seat (21) and the first connecting seat (11) on the second supporting structure (2).

5. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 4, characterized in that: The third supporting structure (6) and the fourth supporting structure (7) both include: Two groups of third support columns (71) and two groups of fourth support columns (72), both ends of the four groups of support columns are fixedly connected with fifth connection seats (73), the fifth connection seat (73) at the bottom of the third support column (71) is fixedly connected with the fifth connection seat (73) at the top of the fourth support column (72), and the fifth connection seat (73) at the top of the third support column (71) is fixedly connected with the corresponding second crossbeam (9) or third crossbeam (10); The gantry base (74) has two sides of the top fixedly connected to the fifth connecting seat (73) at the bottom of the fourth supporting column (72).

6. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 5, characterized in that: A third connecting seat (19) is welded to both ends of the bottom of the second crossbeam (9) and the third crossbeam (10), and the third connecting seat (19) is fixedly connected to a fifth connecting seat (73) at the top of the third support column (71).

7. The gearbox tower maintenance combined hoist for a wind turbine generator set according to claim 6, characterized in that: The three groups of longitudinal beams, the five groups of transverse beams, the first connecting seat (11) and the second connecting seat (32) are all provided with waist-shaped grooves (18) for adjusting the connection position.

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