On-tower reset device for wind generating set gearbox torque arm pin shaft

Abstract

The utility model discloses an on-tower resetting device for a wind generating set gear box torque arm pin shaft, which comprises a jacking tool, the jacking tool comprises bolts, a jacking positioning block, a hydraulic jack and a fixed supporting seat, the fixed supporting seat is fixedly connected with a cabin plate through four groups of bolts, and the jacking positioning block is fixedly connected with the hydraulic jack. The jacking positioning block is fixed to the rear end of the pin shaft through a screw, the hydraulic jack is fixed to the fixed supporting base, and the hydraulic jack and the central axis of the pin shaft are coaxially arranged. In the utility model, by designing the on-tower resetting device of the torsion arm pin shaft and matching with an on-tower maintenance scheme, the resetting tool and the corresponding lifting appliance and accessories are arranged in the cabin, so that the on-tower resetting and elastic support replacement of the torsion arm pin shaft channeling shaft of the gear box can be completed in the cabin, and the gear box does not need to be returned to a factory for maintenance from the tower; the method has the advantages that the maintenance service response time is shortened, the operation and maintenance cost is reduced, the safety risk is small, in-cabin maintenance is not affected by severe weather, and the construction period controllability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine generators, in particular to a tower-mounted resetting device for a torque arm pin shaft of a gear box of a wind turbine generator set. Background Art

[0002] During the operation of wind turbines, the wind conditions often change, and the gearbox will be subjected to the resulting axial force. During the repeated pushing and pulling of the torque arm pins on both sides of the gearbox positioning support, once the force exceeds the clamping friction between the pin hole and the pin, the pin may be pulled out, thus affecting the stability, service life and safety of the gearbox during operation (if the entire pin is pulled out, it will cause the safety risk of the gearbox tipping over).

[0003] Under the current circumstances, if the displaced torque arm pin needs to be reset, the gearbox can only be lowered from the tower for maintenance. However, such a maintenance plan has a long response time, high operation and maintenance costs, and great safety risks. The construction period is greatly affected by the weather and road conditions in the wind farm. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems mentioned in the above-mentioned background technology, and to propose a tower-mounted resetting device for the torque arm pin shaft of the gear box of a wind turbine generator set. By designing a tower-mounted resetting device for the torque arm pin shaft and cooperating with the tower-mounted maintenance plan, a resetting tool and corresponding hoists and accessories are installed inside the cabin, so that the tower-mounted resetting and elastic support replacement of the gear box torque arm pin shaft can be completed in the cabin, without the need to return the gear box to the factory for repair under the tower.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tower reset device for a torque arm pin shaft of a gear box of a wind turbine generator set comprises a cabin plate, a wind turbine gear box is arranged on the cabin plate, a torque arm is arranged on the wind turbine gear box, pin shafts are interference fit in pin holes on both sides of the torque arm, front and rear pressure ends of the pin shaft are fixedly connected to the cabin plate through elastic support components, and also comprises a tightening tool arranged at the rear end of the pin shaft, the tightening tool comprises bolts, a tightening positioning block, a hydraulic jack and a fixed support seat, the fixed support seat is fixedly connected to the cabin plate through four groups of bolts, the tightening positioning block is fixed to the rear end end of the pin shaft by screws, the hydraulic jack is fixed to the fixed support seat, and the hydraulic jack is coaxially arranged with the center axis of the pin shaft.

[0007] As a further description of the above technical solution:

[0008] The elastic support assembly includes an elastic support upper seat, an elastic tile, an elastic support lower seat and studs. The elastic tile is sleeved on the pin shaft, and the elastic support upper seat and the elastic support lower seat are sleeved on the outside of the elastic tile and fixedly connected to the cabin plate through four groups of studs.

[0009] As a further description of the above technical solution:

[0010] The elastic support assembly also includes a baffle that contacts the elastic tile portion. Two groups of baffles are fixedly connected to the elastic support upper seat by screws, and one group of baffles is fixedly connected to the elastic support lower seat by screws.

[0011] As a further description of the above technical solution:

[0012] The three groups of baffles are arranged around the central axis of the elastic tile at intervals of 120°.

[0013] As a further description of the above technical solution:

[0014] The elastic support assembly also includes a baffle, which is fixedly connected to the end of the pin shaft by multiple sets of screws. The central axes of the baffle, the pin shaft and the elastic tile coincide, and the baffle is in partial contact with the elastic tile.

[0015] As a further description of the above technical solution:

[0016] The elastic support assembly also includes a distance ring, which is sleeved on the pin shaft and has two ends that are in contact with the elastic tile and the torque arm respectively.

[0017] To sum up, due to the adoption of the above-mentioned technical scheme, the beneficial effect of the utility model is: by designing the tower reset device of the torque arm pin shaft and cooperating with the tower maintenance plan, the reset tooling and corresponding hoists and accessories are installed inside the cabin, so that the tower reset and elastic support replacement of the gear box torque arm pin shaft can be completed in the cabin, without the need to return the gear box to the factory for repair, which has the advantages of shortened maintenance service response time, reduced operation and maintenance costs, low safety risks, cabin maintenance is not affected by bad weather, and the construction period is highly controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A partial explosion schematic diagram of a tower resetting device provided according to an embodiment of the utility model is shown;

[0019] Figure 2 A partial top view schematic diagram of a tower top resetting device provided according to an embodiment of the utility model is shown;

[0020] Figure 3 A partial installation diagram of a torque arm pin shaft of a wind turbine gearbox provided in accordance with an embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a torque arm pin shaft of a wind turbine gearbox provided according to an embodiment of the utility model is shown.

[0022] Legend:

[0023] 1. Cabin plate; 2. Gear box; 3. Torque arm; 4. Elastic support assembly; 41. Elastic support upper seat; 42. Baffle; 43. Baffle; 44. Elastic tile; 45. Elastic support lower seat; 46. Distance ring; 5. Pin; 61. Bolt; 62. Tightening positioning block; 63. Hydraulic jack; 64. Fixed support seat. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-4 The utility model provides a technical solution: a tower reset device for a torque arm pin shaft of a gear box of a wind turbine generator set, comprising a cabin plate 1, on which a wind turbine gear box 2 is arranged (the gear box structure is a prior art, and only part of the gear box structure is shown in this embodiment to illustrate the structure and position of the reset tooling and the tower maintenance plan, and the remaining structure of the gear box is not repeated here), a torque arm 3 is installed on the wind turbine gear box 2, and the pin holes on both sides of the torque arm 3 are interference-fitted with a pin shaft 5, and the front and rear pressure ends of the pin shaft 5 are fixedly connected to the cabin plate 1 through an elastic support component 4, and the elastic support component 4 includes an elastic support upper seat 41, a baffle 42, a plate 43, an elastic tile 44, an elastic support lower seat 45, a distance ring 46 and a stud, and the baffle 43. The central axes of the pin shaft 5 and the elastic tile 44 coincide, the elastic tile 44 is sleeved on the pin shaft 5, the elastic support upper seat 41 and the elastic support lower seat 45 are sleeved on the outside of the elastic tile 44, and are fixedly connected to the cabin plate 1 through four groups of studs, two groups of baffles 42 are fixedly connected to the elastic support upper seat 41 by screws, and one group of baffles 42 is fixedly connected to the elastic support lower seat 45 by screws, the baffles 42 are partially in contact with the elastic tile 44, and the three groups of baffles 42 are arranged around the central axis of the elastic tile 44 at intervals of 120°, the baffle 43 is fixedly connected to the end of the pin shaft 5 by multiple groups of screws, and the baffle 43 is partially in contact with the elastic tile 44, and the distance ring 46 is sleeved on the pin shaft 5, and its two ends are respectively in contact with the elastic tile 44 and the torque arm 3.

[0026] Specifically, Figure 1 and Figure 2As shown, the resetting device on the tower includes a tightening tool arranged at the rear end of the pin shaft 5, the tightening tool includes bolts 61, a tightening positioning block 62, a hydraulic jack 63 and a fixed support seat 64, the fixed support seat 64 is fixedly connected to the cabin plate 1 by four groups of bolts 61, the tightening positioning block 62 is fixed to the rear end of the pin shaft 5 by screws, the hydraulic jack 63 is fixed on the fixed support seat 64, and the hydraulic jack 63 is coaxially arranged with the center axis of the pin shaft 5.

[0027] In this embodiment, a tower reset device is developed to solve the problem of gearbox torque arm pin shaft deviation in a 2MW unit of a main engine factory. The key processes of tooling design, calculation, in-plant simulation verification of load-bearing capacity and functionality, actual operation and maintenance verification of performance and effect on the tower, and continuous optimization of design and development are carried out, so as to finally achieve the purpose of reasonable device design structure, convenient transportation, installation and operation and maintenance, and safe and reliable performance.

[0028] This device should be used in accordance with the tower main shaft disassembly construction plan, the specific implementation plan is as follows:

[0029] (1) The fan is shut down and locked, and the high-speed shaft end coupling is removed;

[0030] (2) Insert a jack into the lower end of the torque arm of the rear side housing of the pin 5 to pre-tighten the gearbox for support;

[0031] (3) Use a hydraulic wrench to loosen the nuts of the front and rear elastic support assemblies 4, and slightly lift the jack to facilitate the removal of the elastic tile 44;

[0032] (4) Remove the front elastic support upper seat 41, take out the upper and lower elastic tiles and the old distance ring on the torque arm shaft, and insert the new distance ring 46 onto the torque arm pin 5, install the old upper elastic tile back into the front elastic support assembly 4, and tighten the stud bolt manually;

[0033] (5) Remove the rear elastic support upper seat 41, take out the upper and lower elastic tiles and the old distance ring on the torque arm pin shaft, and remove the four studs;

[0034] (6) Lock the fan hub locking pin (to prevent safety issues in the following operations), and place the lower part of the elastic support assembly 4 in a suitable empty space after lifting;

[0035] (7) Lift the jacking fixture, tighten the bolt 61 with a hydraulic wrench, loosen the hydraulic jack 63 to let the gearbox sink to the normal position, lock the studs on the front elastic support assembly with a hydraulic wrench, and slightly push the hydraulic jack 63 until the torque arm touches the elastic tile on the front elastic support assembly;

[0036] (8) Use the hydraulic jack 63 in conjunction with the tightening tool to reset it;

[0037] (9) Loosen the bolt 61 with a hydraulic wrench, and remove the bolt 61 and the tightening tooling;

[0038] (10) Reinstall the lower seat of the rear elastic support, heat-slip the downwind gasket of the pin shaft, install the new elastic tile, stud bolts, and the upper seat of the rear elastic support, and tighten the nuts;

[0039] (11) Use a hydraulic wrench to loosen the studs of the front elastic support assembly, remove the front elastic support upper seat, remove the old elastic tile, heat-slip the wind direction gasket on the pin shaft, replace the new elastic tile, and then install the upper seat. Use a hydraulic wrench to tighten the studs and nuts of the front and rear elastic support assemblies;

[0040] (12) Screw holes are drilled on the outer sides of the upper and lower torque arm pin elastic support seats according to the elastic support size to install the torque arm pin elastic support tile baffle 43;

[0041] (13) Install the new torque arm pin baffle 43 at both ends of the torque arm pin, install a buffer rubber pad between the baffle 43 and the torque arm pin elastic support seat, and then apply thread tightening glue to the bolts and tighten them;

[0042] (14) According to the remaining three holes on the new torque arm pin baffle 43, three threaded holes are drilled on the torque arm pin, and the bolts are coated with thread tightening glue and tightened;

[0043] (15) Install the torque arm pin elastic support seat baffle 42 on the torque arm pin elastic support upper and lower seats;

[0044] (16) Reinstall the diaphragm coupling, realign the gearbox, reinstall the coupling guard, test run the fan, repaint the gearbox, and clean the site.

[0045] In summary, this embodiment has the following advantages:

[0046] (1) Shortened maintenance service response time: When using this torque arm pin reset tooling to perform tower maintenance, maintenance personnel only need to arrive with materials, equipment, and tools to go up the tower for maintenance, without having to wait for the crane to enter the site;

[0047] (2) Reduced operation and maintenance costs: Save the cost of returning the gearbox to the factory, renting a crane, and leveling the road surface;

[0048] (3) 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, or perform other high-altitude operations, which greatly reduces safety risks.

[0049] (4) 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;

[0050] (5) 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.

[0051] 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 tower reset device for a torque arm pin shaft of a wind turbine gearbox, comprising a cabin plate (1), a wind turbine gearbox (2) arranged on the cabin plate (1), a torque arm (3) mounted on the wind turbine gearbox (2), a pin shaft (5) being interference-fitted with pin holes on both sides of the torque arm (3), and a front and rear pressure ends of the pin shaft (5) being fixedly connected to the cabin plate (1) through an elastic support assembly (4), characterized in that: It also includes a tightening tool arranged at the rear end of the pin shaft (5), the tightening tool including bolts (61), a tightening positioning block (62), a hydraulic jack (63) and a fixed support seat (64), the fixed support seat (64) is fixedly connected to the cabin plate (1) by four groups of bolts (61), the tightening positioning block (62) is fixed to the rear end of the pin shaft (5) by screws, the hydraulic jack (63) is fixed to the fixed support seat (64), and the hydraulic jack (63) is coaxially arranged with the center axis of the pin shaft (5).

2. The tower reset device for the torque arm pin of the wind turbine gearbox according to claim 1, characterized in that: The elastic support assembly (4) comprises an elastic support upper seat (41), an elastic tile (44), an elastic support lower seat (45) and studs. The elastic tile (44) is sleeved on the pin shaft (5). The elastic support upper seat (41) and the elastic support lower seat (45) are sleeved on the outside of the elastic tile (44) and are fixedly connected to the cabin plate (1) via four groups of studs.

3. The tower reset device for the torque arm pin of the wind turbine gearbox according to claim 2, characterized in that: The elastic support assembly (4) further comprises a baffle (42) partially in contact with the elastic tile (44); two groups of baffles (42) are fixedly connected to the elastic support upper seat (41) by screws; and one group of baffles (42) is fixedly connected to the elastic support lower seat (45) by screws.

4. The tower reset device for the torque arm pin of the wind turbine gearbox according to claim 3, characterized in that: The three groups of baffles (42) are arranged around the central axis of the elastic tile (44) at intervals of 120°.

5. The tower reset device for the torque arm pin of the wind turbine gearbox according to claim 4, characterized in that: The elastic support assembly (4) further comprises a baffle (43), the baffle (43) being fixedly connected to the end of the pin shaft (5) by means of a plurality of sets of screws, the central axes of the baffle (43), the pin shaft (5) and the elastic tile (44) being coincident, and the baffle (43) being partially in contact with the elastic tile (44).

6. The tower-mounted resetting device for the torque arm pin of a wind turbine gearbox according to claim 5, characterized in that: The elastic support assembly (4) further comprises a distance ring (46), which is sleeved on the pin shaft (5) and has two ends respectively in contact with the elastic tile (44) and the torque arm (3).

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