Replacement equipment for variable pitch bearing of wind driven generator

Abstract

The utility model relates to the technical field of wind power operation and maintenance, and provides a device for replacing a variable pitch bearing of a wind driven generator. The replacement equipment comprises a first fixing assembly, a movable pulley, a first steel wire rope and a driving assembly. The first fixing assembly comprises a fixing connector used for being fixed to a first variable-pitch bearing. The movable pulley is used for being fixed to a second variable-pitch bearing. The first end of the first steel wire rope is fixed on the fixed joint; the driving assembly is coupled with the second end of the first steel wire rope, is suitable for being fixed to the first variable-pitch bearing, the second variable-pitch bearing or the ground and is used for controlling the first steel wire rope to move; according to the replacing equipment provided by the utility model, through the synergistic effect of the first fixing assembly, the movable pulley, the first steel wire rope and the driving assembly, the strict requirements of traditional hoisting on site space and equipment tonnage can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power operation and maintenance technology, especially to a kind of replacement equipment for wind turbine variable pitch bearing. BACKGROUND

[0002] The variable pitch bearing of wind turbine generator set is the core component connecting hub and blade. In the long-term operation process, the variable pitch bearing is prone to damage due to factors such as alternating load, extreme weather or insufficient maintenance, and needs to be replaced. The conventional replacement method requires the whole impeller to be disassembled from the unit, hoisted to the ground, separated from the old variable pitch bearing, and then assembled with the new variable pitch bearing and hoisted to the hub. In this process, the impeller is large in size and heavy in weight, and needs to be turned over in the air during hoisting, which has high requirements for hoisting equipment and construction site, and generally requires a large crane to complete the whole disassembly and installation of the impeller.

[0003] However, mountainous wind farms often face problems such as poor transportation and small site, and large cranes are difficult to access, usually requiring road repair and site modification, which leads to a sharp increase in construction cost and a prolonged construction period, so the variable pitch bearing replacement device needs to be optimized and improved. SUMMARY

[0004] The utility model provides a kind of replacement equipment for wind turbine variable pitch bearing, to solve the problem of dependence on large crane or caterpillar crane in the prior art variable pitch bearing replacement, and the problem of strict requirement on construction site, through the synergistic effect of first fixed component, movable pulley, first steel wire rope and driving assembly, the strict requirement of traditional hoisting on site space and equipment tonnage can be reduced.

[0005] The utility model provides a kind of replacement equipment for wind turbine variable pitch bearing, comprising:

[0006] First fixed component, comprising fixed joint, the fixed joint is used to be fixed to first variable pitch bearing;

[0007] Movable pulley, located at one side of the fixed joint, the movable pulley is used to be fixed to second variable pitch bearing;

[0008] First steel wire rope, first end is fixed to the fixed joint, and second end is wound on the movable pulley;

[0009] A driving assembly is coupled with the second end of the first steel wire rope, the driving assembly is adapted to be fixed to the first variable pitch bearing, the second variable pitch bearing or the ground, and the driving assembly is used to control the movement of the first steel wire rope; in the case that the driving assembly is arranged at the second variable pitch bearing or the ground, the first fixing assembly further comprises a first fixed pulley used to be fixed to the first variable pitch bearing, the movable pulley is located between the fixed joint and the first fixed pulley, and the second end of the first steel wire rope is wound around the movable pulley and the first fixed pulley in sequence.

[0010] According to the utility model provide a kind of replacement equipment for wind driven generator variable pitch bearing, the driving assembly includes:

[0011] A hoist, the second end of the first steel wire rope is arranged in the hoist, the hoist is adapted to be fixed to the first variable pitch bearing, the second variable pitch bearing or the ground, and the hoist is used to control the movement of the first steel wire rope;

[0012] A rope collecting component is arranged in the second end of the first steel wire rope and is located on the side of the lower rope outlet of the hoist, and the rope collecting component is used to wind and unwind the first steel wire rope.

[0013] According to the utility model provide a kind of replacement equipment for wind driven generator variable pitch bearing, the rope collecting component includes:

[0014] A rope collecting support is arranged in the second end of the first steel wire rope and is located on the side of the lower rope outlet of the hoist;

[0015] A transmission shaft is rotatably arranged in the rope collecting support;

[0016] A motor is connected with the transmission shaft and is used to drive the transmission shaft to rotate;

[0017] A rope collecting cylinder is sleeved on the transmission shaft, and the second end of the first steel wire rope is fixed to the rope collecting cylinder.

[0018] According to the utility model provide a kind of replacement equipment for wind driven generator variable pitch bearing, the rope collecting cylinder includes a cylinder body and a transmission plate, the cylinder body is sleeved on the outer side of the transmission plate, or the transmission plate is arranged at the end of the cylinder body; the second end of the first steel wire rope is fixed to the cylinder body, and the transmission plate is rotatably sleeved on the transmission shaft;

[0019] The rope collecting component further includes a spring, a friction plate and a locking piece, the friction plate, the spring and the locking piece are sequentially sleeved on the transmission shaft, one side of the friction plate away from the spring is attached to the transmission plate, the locking piece is threadedly connected with the transmission shaft, and the friction plate is used to drive the transmission plate to rotate under the drive of the transmission shaft.

[0020] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model, in the case that the driving assembly is arranged on the ground, further comprises:

[0021] The guide rope support is arranged on the passing path of the second end of the first steel wire rope and is arranged at the maintenance opening of the second variable-pitch bearing.

[0022] The guide rope roller is rotatably arranged on the guide rope support and is coupled with the second end of the first steel wire rope.

[0023] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model, the driving assembly comprises a hoisting component, the second end of the first steel wire rope is fixed to the hoisting component, the hoisting component is suitable for being fixed to the first variable-pitch bearing, the second variable-pitch bearing or the ground, and the hoisting component is used for controlling the movement of the first steel wire rope.

[0024] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model, the first fixing assembly further comprises a fixed pulley mounting rack, and the fixed pulley mounting rack is suitable for being fixed to the first variable-pitch bearing.

[0025] In the case that the first fixing assembly comprises the first fixed pulley, the fixed joint is rotatably arranged on one side of the fixed pulley mounting rack, and the first fixed pulley is rotatably arranged on the other side of the fixed pulley mounting rack.

[0026] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model further comprises:

[0027] The adjusting support is suitable for being mounted to the front hole of the hub.

[0028] The lifting component is arranged on the adjusting support and is used for adjusting the angle of the second variable-pitch bearing relative to the horizontal plane.

[0029] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model further comprises:

[0030] The first auxiliary connecting rack is used for being fixed to the first variable-pitch bearing.

[0031] The second auxiliary connecting rack is connected with the first auxiliary connecting rack fastener, and the second auxiliary connecting rack is used for being fixed to the second variable-pitch bearing.

[0032] The replacement equipment for the variable-pitch bearing of the wind driven generator provided by the utility model further comprises:

[0033] The lifting belt has a first end used for being fixed to the first variable-pitch bearing.

[0034] A second fixed pulley is arranged at the second end of the sling, and the second fixed pulley is arranged directly above the access hole of the second variable pitch bearing;

[0035] A second steel wire rope is arranged around the second fixed pulley;

[0036] A second driving component is connected with the first end of the second steel wire rope, and the second driving component is used to drive the second end of the second steel wire rope to move along the vertical direction.

[0037] In the replacement device, the fixing joint in the first fixing assembly is fixed to the first variable pitch bearing which is not replaced by means of bolt connection, so that the first variable pitch bearing can be used to form a stable fulcrum for hoisting of the first steel wire rope. In addition, the movable pulley is fixed to the second variable pitch bearing, so that a coupling basis can be provided between the first steel wire rope and the second variable pitch bearing. Based on this, the first steel wire rope takes the fixing joint as a starting end, passes around the movable pulley, and is coupled with the driving assembly after changing the direction, so that the temporary hoisting system of quick disassembly and quick assembly can be formed by modular components. When the driving assembly releases the first steel wire rope, the length of the steel wire rope segments on both sides of the movable pulley increases to make the old second variable pitch bearing descend synchronously with the movable pulley. When the driving assembly recovers the steel wire rope, the movable pulley drives the new second variable pitch bearing to ascend under the action of the driving assembly and the first steel wire rope. Through the cooperative action of the fixing joint, the movable pulley, the first steel wire rope and the driving assembly, the replacement of the second variable pitch bearing can be realized.

[0038] In addition, the driving assembly can be arranged on the first variable pitch bearing, or arranged on the second variable pitch bearing, or arranged on the ground. This makes the replacement device have various flexible setting schemes in actual use, and can give targeted solutions according to different actual environments and actual needs, thereby effectively improving the construction efficiency and reducing the difficulty of actual construction. In addition, when the driving assembly is arranged on the ground, the operator can directly implement lifting control, and the installation difficulty and control difficulty of the replacement device can be reduced.

[0039] Compared to existing technologies, the replacement equipment provided by this invention directly connects the first fixing component to the first pitch bearing. This transfers the load of the second pitch bearing, which traditionally requires a large crane, to the existing turbine structure, including the first pitch bearing. This reduces reliance on large cranes for the second pitch bearing's installation and removal, thus overcoming limitations imposed by large cranes on its replacement. Furthermore, the partial lifting method for the second pitch bearing eliminates the need for complete impeller disassembly and rotation. This structural design not only reduces the stringent requirements of traditional lifting methods regarding space and equipment tonnage but also allows for replacement work in mountainous or confined terrain using only small equipment, effectively reducing the difficulty of replacing the second pitch bearing. Additionally, each operation only requires disassembling and installing a single second pitch bearing, allowing the remaining blades and the first pitch bearing to remain in their original state. This targeted approach minimizes disturbance to other turbine components and effectively shortens the construction cycle. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is an assembly diagram of the replacement device provided in this embodiment of the utility model.

[0042] Figure 2 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the utility model at the pitch bearing.

[0043] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0044] Figure 4 This is a schematic diagram of the assembly of a partial structure of the lifting device provided in this embodiment of the invention at the bottom of the tower.

[0045] Figure 5 This is a schematic diagram of the axonal structure of the drive assembly provided in an embodiment of the present invention.

[0046] Figure 6 This is a schematic diagram of the axial structure of the rope winding component provided in this embodiment of the utility model.

[0047] Figure 7 This is a cross-sectional structural diagram of the rope winding component provided in this embodiment of the utility model from a top view.

[0048] Figure 8 is Figure 7 is a local enlarged structure schematic view at B in the figure.

[0049] Figure 9 is a shaft side structure schematic view of the guide rope assembly provided by the embodiment of the utility model.

[0050] Figure 10 is an assembly schematic view of the angle adjusting assembly provided by the embodiment of the utility model.

[0051] Figure 11 is a shaft side structure schematic view of the angle adjusting assembly provided by the embodiment of the utility model.

[0052] Figure 12 is a shaft side structure schematic view of the first fixing assembly provided by the embodiment of the utility model.

[0053] Figure 13 is an assembly schematic view of the static force auxiliary hoisting assembly provided by the embodiment of the utility model.

[0054] Reference signs:

[0055] 10: first variable pitch bearing; 20: second variable pitch bearing; 30: hub; 40: tower drum; 100: first fixing assembly; 110: fixed joint; 120: first fixed pulley; 130: fixed pulley mounting frame; 200: movable assembly; 210: fixed base; 220: movable pulley; 300: first steel wire rope; 400: driving assembly; 410: mounting frame; 420: guide rope wheel; 430: hoist; 440: rope winding part; 441: rope winding support; 442: transmission shaft; 443: motor; 444: rope winding drum; 4441: drum body; 4442: transmission plate; 445: spring; 446: friction plate; 447: locking piece; 448: pressing plate; 449: copper sleeve; 500: guide rope assembly; 510: guide rope support; 520: guide rope roller; 600: angle adjusting assembly; 610: adjusting support; 611: support; 6111: upper support surface; 6112: lower support surface; 612: lock nut; 613: tensioning bolt; 614: limiting plate; 620: lifting part; 700: first auxiliary connecting frame; 800: second auxiliary connecting frame; 900: static force auxiliary hoisting assembly; 910: sling; 920: second fixed pulley; 930: second steel wire rope; 940: second driving part. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0057] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For the ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0059] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0060] Figure 1 is the assembly schematic diagram of the whole replacement equipment provided by the embodiments of the present application.

[0061] For the convenience of understanding, the utility model first makes a brief description of the variable pitch bearing and its related parts. Referring to Figure 1The variable pitch bearing is used for connecting a hub 30 in a rotor and a blade in the rotor, and three mounting portions are arranged on the hub 30, the mounting portions are 120 degrees apart from each other, and each mounting portion is provided with a variable pitch bearing, and the outer side of the variable pitch bearing is used for connecting and fixing the corresponding blade.

[0062] The edge of the variable pitch bearing is provided with a plurality of bolt holes, the bolt holes are used for bolt connection with the hub 30, and each variable pitch bearing is provided with an inspection opening; the plane where each variable pitch bearing is located is inclined towards the front hole of the hub 30, in other words, when any variable pitch bearing is rotated to be directly below the hub 30, the end close to the front hole of the hub 30 is slightly higher than the other end, that is, the variable pitch bearing is arranged at an angle a with the horizontal plane, and the specific reason can be referred to the prior art.

[0063] It should be noted that the application object of the replacement equipment (for the convenience of description, the replacement equipment is referred to as the replacement equipment hereinafter) for the variable pitch bearing of the wind driven generator provided in the embodiment of the utility model is not only limited to the three-blade generator, but also can be a two-blade generator, a four-blade generator or a five-blade generator, and the arrangement of the replacement equipment can refer to the examples given in the three-blade generator in the present application, and the other structures of the wind driven generator can refer to the prior art, which will not be described here.

[0064] It should be noted that the replacement equipment provided in the embodiment of the utility model is only used for replacing one variable pitch bearing each time, for the convenience of explanation and description, the variable pitch bearing to be replaced is referred to as the second variable pitch bearing 20, and the other variable pitch bearings except the variable pitch bearing to be replaced are referred to as the first variable pitch bearing 10; it should be noted that after the second variable pitch bearing 20 to be replaced is replaced in the first replacement process, if the other variable pitch bearings also need to be replaced, when the first variable pitch bearing 10 in the first replacement process is replaced, that is, in the second replacement process, the first variable pitch bearing 10 is the second variable pitch bearing 20 in the second replacement process, and the second variable pitch bearing 20 that has been replaced in the first replacement process is the first variable pitch bearing 10 in the second replacement process.

[0065] Figure 2 is the assembly schematic view of the local structure of the lifting device at the variable pitch bearing provided in the embodiment of the utility model; Figure 3 is Figure 2 is the local enlarged structure schematic view of A in the embodiment of the utility model; Figure 4 is the assembly schematic view of the local structure of the lifting device at the bottom of the tower drum 40 provided in the embodiment of the utility model.

[0066] Referring to Figures 1 to 4The utility model embodiment provides a kind of replacement equipment, and replacement equipment includes lifting device, lifting device includes first fixed component 100, movable assembly 200, first steel wire rope 300 and drive assembly 400, first fixed component 100 includes fixed joint 110, fixed joint 110 specifically can adopt wedge joint etc.

[0067] Movable assembly 200 includes fixed base 210 and movable pulley 220, movable pulley 220 is rotatably arranged on fixed base 210 by pin shaft, in use, fixed base 210 is used to be fixed to second variable pitch bearing 20, specifically, fixed base 210 can be fixed to the bolt hole of the edge of second variable pitch bearing 20 for connecting blade by bolt etc.

[0068] In use, the first end of first steel wire rope 300 is fixed to fixed joint 110, the second end of first steel wire rope 300 extends downward, extends upward after passing movable pulley 220 below, drive assembly 400 is located on the travel path of first steel wire rope 300, and is coupled with first steel wire rope 300, and drive assembly 400 is used to drive first steel wire rope 300 to move.In use, the position of drive assembly 400 has three optional conditions, condition 1: drive assembly 400 can be arranged on first variable pitch bearing 10;Condition 2: drive assembly 400 can be arranged on second variable pitch bearing 20;Condition 3: drive assembly 400 can be arranged on ground, i.e. the root of tower drum 40.

[0069] It needs to be explained that, in condition 2 and condition 3, since the second end of first steel wire rope 300 will be reversed after passing movable pulley 220, therefore, a first fixed pulley 120 needs to be arranged in first fixed component 100 again, and the direction of the second end of first steel wire rope 300 is converted twice by first fixed pulley 120, so as to be coupled with drive assembly 400.Specifically, the first end of first steel wire rope 300 is fixed to fixed joint 110, and the second end of first steel wire rope 300 will be wound movable pulley 220 and first fixed pulley 120 in turn, and then coupled with drive assembly 400, wherein, when drive assembly 400 is located on ground, the second end of first steel wire rope 300 needs to extend to ground after leaving first fixed pulley 120.

[0070] It also needs to be explained that the fixed joint 110 and the first fixed pulley 120 are spaced apart, and the specific position between the two can be adaptively set, and the embodiments of the utility model do not limit this, but the position of the fixed base 210 needs to be located between the fixed joint 110 and the first fixed pulley 120, that is, the position of the movable pulley 220 needs to be located between the fixed joint 110 and the first fixed pulley 120, so as to avoid the position interference of the winding of the first steel wire rope 300.

[0071] The following shows the movement principle of the lifting device.

[0072] Dismantling the old second variable pitch bearing 20: after the driving device is started, the driving device will control the first steel wire rope 300 to move from the driving device to the first fixed pulley 120, the first steel wire rope 300 will change the rotating direction at the first fixed pulley 120, the first steel wire rope 300 between the first steel wire rope 300 and the movable pulley 220 will move from the first fixed pulley 120 to the movable pulley 220, and change the moving direction again at the movable pulley 220; with the continuous movement of the first steel wire rope 300 and the gravity of the second variable pitch bearing 20 itself, the first steel wire rope 300 on both sides of the movable pulley 220 will gradually lengthen, that is, in the vertical direction, the movable pulley 220 will move away from the fixed joint 110 and the first fixed pulley 120, and the second variable pitch bearing 20 fixedly connected with the movable pulley 220 will move towards the ground, and this process is the descending process of the old variable pitch bearing.

[0073] Replacing the new second variable pitch bearing 20: after the second variable pitch bearing 20 is completely lowered to the ground, the movable assembly 200 is disassembled from the second variable pitch bearing 20 as a whole and is installed on the new second variable pitch bearing 20, and after the driving device is started, the driving device will control the first steel wire rope 300 to move from the first fixed pulley 120 to the driving device; the first steel wire rope 300 between the first steel wire rope 300 and the movable pulley 220 will move from the movable pulley 220 to the first fixed pulley 120, and with the continuous movement of the first steel wire rope 300, the first steel wire rope 300 on both sides of the movable pulley 220 will gradually shorten, that is, in the vertical direction, the movable pulley 220 will move towards the fixed joint 110 and the first fixed pulley 120, and the second variable pitch bearing 20 fixedly connected with the movable pulley 220 will also move towards the fixed joint 110 and the first fixed pulley 120, and this process is the ascending process of the new variable pitch bearing.

[0074] With the cooperation of the above two cases, the replacement of the second variable pitch bearing 20 can be realized.

[0075] Reference Figures 2 to 4It can be understood that the replacement device provided in the embodiment of the utility model, in use, the fixing joint 110 in the first fixing assembly 100 is fixed to the unreplaced first variable pitch bearing 10 through bolt connection, so that the hoisting of the first steel wire rope 300 can form a stable fulcrum by using the first variable pitch bearing 10. Secondly, the movable pulley 220 is fixed to the second variable pitch bearing 20, so that a coupling basis can be provided between the first steel wire rope 300 and the second variable pitch bearing 20. Based on this, the first steel wire rope 300 takes the fixing joint 110 as a starting end, passes through the movable pulley 220, and is coupled with the driving assembly 400 after direction transformation, so that a quick-disassembly and quick-assembly type temporary hoisting system can be formed by modular components. When the driving assembly 400 releases the first steel wire rope 300, the length of the steel wire rope section on both sides of the movable pulley 220 increases to make the old second variable pitch bearing 20 descend synchronously with the movable pulley 220; when the driving assembly 400 recovers the steel wire rope, the movable pulley 220 drives the new second variable pitch bearing 20 to ascend under the action of the driving assembly 400 and the first steel wire rope 300, and the cooperation of the fixing joint 110, the movable pulley 220, the first steel wire rope 300 and the driving assembly 400 can realize the replacement of the second variable pitch bearing 20.

[0076] In addition, the driving assembly 400 can be selectively arranged on the first variable pitch bearing 10, can be selectively arranged on the second variable pitch bearing 20, and can also be selectively arranged on the ground. This makes the replacement device have various flexible setting schemes in actual use, can give targeted solutions according to different actual environments and actual needs, and further effectively improves the construction efficiency and reduces the difficulty of actual construction. Secondly, when the driving assembly 400 is arranged on the ground, it can also facilitate the operator to directly implement lifting control, and can reduce the installation difficulty and control difficulty of the replacement device.

[0077] Compared with the prior art, the first fixed assembly 100 is directly connected with the first variable pitch bearing 10 in the replacement device provided by the embodiment of the utility model, so that the load of the second variable pitch bearing 20 borne by the large crane in the traditional method can be transferred to the original structure of the wind turbine such as the first variable pitch bearing 10 for bearing, so that the dependence of the large crane on the dismounting process of the second variable pitch bearing 20 can be reduced, and then the limitation of the large crane and other factors on the replacement of the second variable pitch bearing 20 can be solved; meanwhile, the local hoisting mode of the second variable pitch bearing 20 also eliminates the necessity of the integral dismounting and overturning of the impeller, and the structure design not only reduces the strict requirements of the traditional hoisting on the site space and the equipment tonnage, but also enables the replacement work to be completed by only small equipment in the mountainous area or narrow terrain, so that the operation difficulty of the replacement of the second variable pitch bearing 20 can be effectively reduced. In addition, only a single second variable pitch bearing 20 to be replaced needs to be dismounted and mounted in a single operation, so that the remaining blades and the first variable pitch bearing 10 and the like can be maintained in the original state, and the targeted operation mode can not only reduce the disturbance to other components of the unit, but also effectively shorten the construction period.

[0078] Referring to Figure 2 In the optional embodiment of the utility model, when the lifting device is arranged, one lifting device can be arranged on each side of the second variable pitch bearing 20, and the connecting line of the position of the movable pulley 220 in the two groups of lifting devices on the second variable pitch bearing 20 needs to pass through the center of the second variable pitch bearing 20, so that the overturning problem caused by the gravity center deviation can be avoided. As described above, the lifting device can adaptively arrange the number of lifting devices according to the weight and stability of the second variable pitch bearing 20 to be replaced, for example, three or four lifting devices. It can be understood that the lifting devices symmetrically arranged on the two sides in the embodiment can respectively lift or lower the second variable pitch bearing 20 from the two sides of the second variable pitch bearing 20, and the two hoisting points can not only simplify the required components, but also ensure the stability of the second variable pitch bearing 20.

[0079] In the embodiment of the utility model, the first fixed assembly 100 and the driving assembly 400 are arranged on the first variable pitch bearing 10, and in some optional embodiments, the first fixed assembly 100 and the driving assembly 400 can also be connected on components such as the hub 30 through additional components, as long as appropriate fulcrums are provided for the lifting device in the nacelle, and specifically, adaptive selection can be made according to the actual situation.

[0080] Figure 5 It is the shaft side structure schematic view of the driving assembly provided by the embodiment of the utility model.

[0081] Referring to Figure 3 and Figure 5In the embodiment of the utility model, the driving assembly 400 includes the hoist 430, the mounting frame 410, the guide rope wheel 420 and the rope collecting component 440, wherein the hoist 430, the mounting frame 410 and the guide rope wheel 420 are connected into one through fasteners; the hoist 430 includes an upper rope outlet and a lower rope outlet, which are oppositely arranged at the upper and lower ends of the hoist 430, and the guide rope wheel 420 is arranged directly below the lower rope outlet; the mounting frame 410 is used for being mounted to the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground, for example, the mounting frame 410 can be fixed on the first variable pitch bearing 10 by using the connecting bolts of the first variable pitch bearing 10 and the blade; it should be noted that the upper rope outlet of the hoist 430 needs to be located below the first fixed pulley 120, and the hoist 430 needs to be located in the same plane as the first fixed pulley 120, so as to avoid interference with the threading of the first steel wire rope 300.

[0082] In use, after the second end of the first steel wire rope 300 leaves and passes by the first fixed pulley 120, the second end of the first steel wire rope 300 enters the hoist 430 from the upper rope outlet of the hoist 430, and in the hoist 430, the second end of the first steel wire rope 300 is wound on the grooved inner ring gear and is pressed by the rope pressing mechanism, and then leaves the hoist 430 from the lower rope outlet; after the first steel wire rope 300 leaves the hoist 430, the first steel wire rope 300 passes through the guide rope wheel 420 and continues to extend to the far end, and the brake motor on the hoist 430 drives the grooved inner ring gear to rotate through the worm and gear pair, thereby realizing the movement of the first steel wire rope 300.

[0083] The second steel wire rope 930 needs to have sufficient length after leaving the hoist 430 to meet the requirement of height change of the movable pulley 220 in the hoisting process, however, the first steel wire rope 300 on the side of the lower rope outlet of the hoist 430 is in a free state, and is prone to accumulation or knotting; in the embodiment of the utility model, the rope collecting component 440 is arranged on the moving path of the first steel wire rope 300 leaving the hoist 430, and the second end of the second steel wire rope 930 is fixed on the rope collecting component 440 after leaving, and the rope collecting component 440 is used for winding the free section of the second steel wire rope 930.

[0084] The installation position of the rope collecting component 440 can be adaptively selected according to the position of the hoist 430, for example, when the hoist 430 is arranged on the first variable pitch bearing 10, the rope collecting component 440 can be arranged on the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground; when the hoist 430 is arranged on the second variable pitch bearing 20, the rope collecting component 440 can be arranged on the second variable pitch bearing 20 or the ground; when the hoist 430 is arranged on the ground, the rope collecting component 440 can be arranged on the ground. Figure 3 For the example of the mounting frame 410 being arranged on the first variable pitch bearing 10, Figure 4For the example of setting the rope collecting component 440 on the ground, other position setting modes of the hoisting machine 430, the mounting frame 410, the guide rope wheel 420 and the rope collecting component 440 can refer to the example, and details are not described herein.

[0085] It can be understood that, in the replacement device provided by the embodiment of the utility model, the hoisting machine 430 serves as a power source, in the use process, the first steel wire rope 300 enters the hoisting machine 430 from the first fixed pulley 120 and is wound in order in the groove inner ring gear and is compressed by the rope compression mechanism, combined with the torque amplification effect of the worm gear reduction mechanism, the moving speed and direction of the first steel wire rope 300 can be accurately adjusted. Secondly, the layout of the guide rope wheel 420 directly below the lower rope outlet can constrain the rope outlet angle of the first steel wire rope 300, thereby avoiding the friction loss of the first steel wire rope 300 and the edge of the equipment. The rope collecting component 440 can collect the free section of the first steel wire rope 300 extending to the far end in real time, thereby solving the problems of winding, knotting or soil sticking caused by the free falling of the rope, and maintaining the tension state of the rope by the rope collecting component 440 can also ensure the continuity of the lifting process.

[0086] In the optional embodiment of the utility model, different from the foregoing embodiment, the hoisting machine 430 in the embodiment can be replaced by a winch component, that is, the winch component is arranged on the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground, and the first steel wire rope 300 after leaving the movable pulley 220 or the first fixed pulley 120 is directly connected to the winch component, and the winch component provides the moving power for the first steel wire rope 300. The specific setting mode is similar to the setting mode of the hoisting machine 430 in the foregoing embodiment, and the winch component can be set adaptively by referring to the setting of the hoisting machine 430; the design of the winch component can refer to the prior art, for example, a winch, and details are not described herein.

[0087] It can be understood that, in the embodiment, the winch component can have the functions of the hoisting machine 430 and the rope collecting component 440, thereby effectively simplifying the power mechanism and the power transmission chain, compared with the worm gear reduction mechanism, the winch component can effectively reduce the energy conversion loss and reduce the volume of the driving assembly 400 as a whole. It can also be understood that, when the hoisting machine 430 or the winch component is arranged on the second variable pitch bearing 20, the connecting point here can be increased by a lifting point on the second variable pitch bearing 20, that is, in this case, a single lifting device can provide two lifting points for the second variable pitch bearing 20, and this design can effectively disperse the load of the second variable pitch bearing 20, thereby improving the stability and safety in the lifting process.

[0088] In other optional embodiments of the utility model, the first fixed pulley 120 and the movable assembly 200 can be omitted, the hoist 430 is directly fixed on the second variable pitch bearing 20, the first end of the first steel wire rope 300 is fixed on the fixed joint 110, the second end of the first steel wire rope 300 is freely lowered to the ground, or the second end of the first steel wire rope 300 is fixed on the ground, the hoist 430 can directly take the second variable pitch bearing 20 to vertically climb or descend along the first steel wire rope 300, and specific reference can be made to the adaptive design of the elevator in the prior art, and details are not described herein.

[0089] Figure 6 It is the shaft side structure schematic diagram of the rope collecting part provided in the utility model embodiment.

[0090] Referring to Figure 6 In optional embodiments of the utility model, the rope collecting part 440 comprises a rope collecting support 441, a rope collecting cylinder 444, a motor 443 and a transmission shaft 442, the second end of the first steel wire rope 300 is fixed to the rope collecting cylinder 444, the rope collecting cylinder 444 is sleeved on the transmission shaft 442, the transmission shaft 442 is rotatably arranged on the rope collecting support 441, the rope collecting support 441 is arranged on the passing path of the second end of the first steel wire rope 300 and is located on the side of the lower rope outlet of the hoist 430, the motor 443 is arranged on one side of the rope collecting support 441, the output shaft of the motor 443 is connected with the transmission shaft 442, and the motor 443 is used for driving the transmission shaft 442 and the rope collecting cylinder 444 to rotate.

[0091] It can be understood that when the hoist 430 drives the first steel wire rope 300 to move, the motor 443 drives the transmission shaft 442 and the rope collecting cylinder 444 to rotate in the corresponding direction, the rotation of the rope collecting cylinder 444 releases or recovers the first steel wire rope 300, thereby meeting the length change requirement of the first steel wire rope 300 on both sides of the movable pulley 220, in the process, the length change amount of the first steel wire rope 300 on both sides of the movable pulley 220 in the lifting process can be offset in real time by the releasing or recovering action of the rope collecting cylinder 444, thereby the constant tension of the first steel wire rope 300 between the hoist 430 and the rope collecting cylinder 444 can be maintained.

[0092] Figure 7 It is the cross-sectional structure schematic diagram of the rope collecting part under the top view provided in the utility model embodiment; Figure 8 It is Figure 7 The local enlarged structure schematic diagram of B in the utility model embodiment.

[0093] Referring to Figure 7 And Figure 8In the optional embodiment of the utility model, the rope collecting cylinder 444 includes a cylinder body 4441 and a transmission plate 4442, the cylinder body 4441 is sleeved outside the transmission plate 4442, and the two are fixedly connected;Or the transmission plate 4442 is arranged at the end of the cylinder body 4441, serving as the end plate of the cylinder body 4441;In the above two cases, the transmission plate 4442 is sleeved on the transmission shaft 442 and rotationally matched with the transmission shaft 442, and the second end of the first steel wire rope 300 is fixed to the cylinder body 4441;It should be noted that in the case where the cylinder body 4441 is sleeved outside the transmission plate 4442, an end plate can also be separately arranged at the end of the cylinder body 4441, as shown in Figure 7 .

[0094] Correspondingly, the rope collecting component 440 also includes a spring 445, a friction plate 446 and a locking piece 447, the spring 445, the friction plate 446 and the locking piece 447 are sequentially sleeved on the transmission shaft 442, one side of the friction plate 446 away from the spring 445 abuts against the transmission plate 4442 and is in close contact with the transmission plate 4442, the locking piece 447 is threadedly matched with the transmission shaft 442, and the friction plate 446 is used to drive the transmission plate 4442 to rotate under the drive of the transmission shaft 442. Among them, the spring 445 can select a spiral spring or a disc spring and other existing components, and the locking piece 447 can select a nut and other existing components.

[0095] When in use, the locking piece 447 can be rotated to change the elastic potential energy stored in the spring 445, and the cooperation of the locking piece 447 and the spring 445 can provide a pre-tightening force, so that the friction plate 446 is tightly attached to the transmission plate 4442;When the transmission shaft 442 rotates, the transmission shaft 442 will drive the friction plate 446 to rotate synchronously, and the friction plate 446 and the transmission plate 4442 are in static friction at this time, so the torque of the transmission shaft 442 can be transmitted to the transmission plate 4442 through the friction plate 446.

[0096] It can be understood that as the number of layers of the first steel wire rope 300 wound on the rope collecting cylinder 444 increases or decreases, the linear velocity of the rope collecting cylinder 444 will also increase or decrease;However, the speed of the elevator 430 is constant, so there must be a phenomenon that the motor 443 and the elevator 430 speed do not match during the rope collecting or releasing process, and the accumulation of this phenomenon will cause the first steel wire rope 300 to be more and more tight, or more and more relaxed, or first in a relaxed state and then in a tight state;When the first steel wire rope 300 is in a relaxed state, the first steel wire rope 300 on the cylinder body 4441 will be more and more tangled;And when the first steel wire rope 300 is more and more tight, it will eventually exceed the load of the motor 443, damaging the motor 443.

[0097] In the optional embodiment of the utility model, the transmission shaft 442 transmits torque through the static friction contact of the friction plate 446 and the transmission plate 4442, which makes the transmission plate 4442 rotate synchronously with the transmission shaft 442 under normal working conditions, and when the load of the rope collecting cylinder 444 suddenly changes, the friction plate 446 and the transmission plate 4442 can slide relatively, thereby avoiding the overload damage of the transmission system. Further, the adjustable pre-tightening force is generated by the thread cooperation of the spring 445 and the locking piece 447, the compression amount of the spring 445 is adjusted by screwing the locking piece 447, the constant friction torque can be set, that is, the rope collecting cylinder 444 has the characteristics of adjustable and constant output torque, when the number of layers of the first steel wire rope 300 increases or decreases, the locking piece 447 is adjusted adaptively, thereby the problem caused by the speed mismatching of the motor 443 and the hoist 430 can be solved, and the smooth and non-entangled rope of the first steel wire rope 300 in the collecting process can be ensured.

[0098] In some optional embodiments, when the number of the transmission plates 4442 is greater than or equal to two, the number of the friction plates 446 can be increased accordingly, the friction plate 446 is arranged on the side of the increased transmission plate 4442 and keeps in the state of adhesion, Figure 7 As shown, two transmission plates 4442 are arranged, specifically, along the direction of the transmission shaft 442, the locking piece 447, the spring 445, the friction plate 446, the transmission plate 4442, the transmission plate 4442 and the friction plate 446 are sequentially sleeved; when pre-tightening, the locking piece 447 extrudes the spring 445, the spring 445 extrudes the first friction plate 446 and the first transmission plate 4442, the locking force is transmitted to the second transmission plate 4442 through the cylinder body 4441, and the second transmission plate 4442 extrudes the second friction plate 446. It can be understood that the laminated arrangement of the multiple groups of transmission plates 4442 and friction plates 446 can expand the adjustable range of the torque transmission capacity, and thereby the load demand under different working conditions can be matched by increasing or decreasing the number of the friction plates 446.

[0099] Referring to Figure 7 And Figure 8 In the optional embodiment of the utility model, the rope collecting component 440 further comprises a pressing plate 448 and a copper sleeve 449, the pressing plate 448 is arranged between the spring 445 and the locking piece 447, and between the spring 445 and the friction plate 446, the pressing plate 448 can increase the contact area between the locking piece 447 and the spring 445, and the contact area between the spring 445 and the friction plate 446, thereby the stress transmission between any two components can be more uniform; the shaft sleeve is welded in the middle of the transmission plate 4442, the copper sleeve 449 is arranged between the shaft sleeve and the transmission shaft 442, when the relative rotation occurs between the transmission plate 4442 and the transmission shaft 442, the relative rotation occurs between the copper sleeve 449 and the shaft sleeve, thereby the wear of the transmission shaft 442 and the transmission plate 4442 can be prevented.

[0100] Figure 9 is the shaft side structure schematic view of the guide rope assembly provided by the embodiment of the utility model.

[0101] Referring to Figure 3 and Figure 9 In the optional embodiment of the utility model, in the case that the driving assembly 400 is arranged on the ground, or only the rope collecting part 440 is arranged on the ground, in order to avoid the position interference or motion interference between the first steel wire rope 300 and the first variable pitch bearing 20 support 611, the first steel wire rope 300 needs to pass through the maintenance opening on the second variable pitch bearing 20 after leaving the first fixed pulley 120 and then extend to the ground, therefore, the replacement equipment is also provided with a guide rope assembly 500, the guide rope assembly 500 comprises a guide rope support 510 and a guide rope roller 520, the guide rope roller 520 is rotatably arranged on the guide rope support 510, the guide rope roller 520 can select a nylon roller, the guide rope roller 520 is arranged on the passing path of the first steel wire rope 300 after leaving the first fixed pulley 120, the guide rope support 510 is used for being mounted to the maintenance opening of the second variable pitch bearing 20, and can be fixed through a fixing bolt or the like, and the specific adaptability adjustment can be carried out according to the actual structure.

[0102] It needs to be noted that the number of the guide rope roller 520 can be adaptively arranged, Figure 9 and two guide rope rollers 520 are arranged. It can be understood that the guide rope roller 520 can prevent the first steel wire rope 300 from scratching the pattern aluminum plate in the middle of the second variable pitch bearing 20 during the up and down movement, can solve the mutual scratching problem between the first steel wire rope 300 and the maintenance opening, and then can prolong the service life of the second variable pitch bearing 20 and the first steel wire rope 300.

[0103] It also needs to be noted that when the driving assembly comprises the hoist 430 and the rope collecting part 440, if the rope collecting part 440 is arranged on the first variable pitch bearing 10 or the second variable pitch bearing 20, in this case, the guide rope assembly 500 can be omitted; when the rope collecting part 440 is located on the ground, no matter which one of the first variable pitch bearing 10, the second variable pitch bearing 20 and the ground the hoist 430 is arranged on, the guide rope assembly 500 needs to be arranged to guide the first steel wire rope 300 to pass through the maintenance opening on the second variable pitch bearing 20 and then extend to the ground. When the driving assembly 400 comprises the winch part, if the winch part is arranged on the first variable pitch bearing 10 or the second variable pitch bearing 20, the guide rope assembly 500 can be omitted; if the winch part is arranged on the ground, the guide rope assembly 500 still needs to be arranged to guide the first steel wire rope 300 to pass through the maintenance opening on the second variable pitch bearing 20 and then extend to the ground.

[0104] Figure 10 is the assembly schematic view of the angle adjusting assembly provided by the embodiment of the utility model; Figure 11It is the shaft side structure schematic diagram of the angle adjusting assembly provided by the embodiment of the utility model.

[0105] Referring to Figure 10 And Figure 11 In the optional embodiment of the utility model, the replacement device further comprises an angle adjusting assembly 600, the angle adjusting assembly 600 comprises an adjusting support 610 and a lifting component 620, the lifting component 620 is arranged on the adjusting support 610, the adjusting support 610 is used for being mounted to the front hole of the hub 30, and the lifting component 620 is used for adjusting the angle of the second variable pitch bearing 20 relative to the horizontal plane. Figure 11 Specifically, the lifting component 620 can be selected from an electric lifting device or a manual lifting device, for example, an electric hoist or a hand hoist,

[0106] When being installed, the upper support surface 6111 and the lower support surface 6112 of the support 611 are respectively attached to the upper outer end surface and the lower inner end surface of the front hole of the hub 30, the tensioning bolt 613 is arranged at the top of the support 611, the position of the tensioning bolt 613 corresponds to the position of the upper support surface 6111 of the support 611, the tensioning bolt 613 is adjusted upward to abut against the upper end surface of the front hole of the hub 30, the tensioning bolt 613 and the upper support surface 6111 of the support 611 form a clamping structure, so that the support 611 is tightly connected with the hub 30, the lock nut 612 is arranged at the root of the tensioning bolt 613, the lock nut 612 is tightened downward until the top of the support 611, so that the loosening of the tensioning bolt 613 is prevented, and the limiting plate 614 is arranged at the bottom of the support 611, the position of the limiting plate 614 corresponds to the position of the lower support surface 6112 of the support 611, the bolt on the limiting plate 614 is screwed, so that the limiting plate 614 and the lower support surface 6112 of the support 611 form a clamping structure, so that the limiting plate 614 is tightly attached to the lower outer end surface of the front hole of the hub 30.

[0107] As described above, since the impeller is actually installed at a certain angle with the ground, the installation position of the second variable pitch bearing 20 is also at an angle a with the horizontal plane, in the initial stage of dismounting and the final stage of mounting the second variable pitch bearing 20, the angle adjusting assembly 600, the two side pulleys 220 and the lifting points are cooperatively operated, so that the second variable pitch bearing 20 is withdrawn or inserted into the bolt rod on the hub 30 at an angle a.

[0108] It can be understood that the setting of the angle adjusting assembly 600 can realize the adjustment of the posture in the second variable pitch bearing 20 hoisting process, can make it meet the actual installation demand of the objective a angle, can make the replacement device more humanized and convenient; compared with the manual pushing mode, this mode is safer and more efficient, compared with other angle adjusting devices, this structure can take the original structure characteristics such as the hub 30 as a fulcrum, realize quick disassembly and quick assembly, and can effectively shorten the construction time.

[0109] Figure 12 It is a shaft side structure schematic diagram of the first fixed assembly provided in the embodiments of the utility model.

[0110] Referring to Figure 12 In optional embodiments of the utility model, the first fixed assembly 100 further includes a fixed pulley mounting frame 130, in the case that the first fixed assembly 100 includes the first fixed pulley 120, the fixed joint 110 is rotatably arranged on one side of the fixed pulley mounting frame 130, the first fixed pulley 120 is rotatably arranged on the other side of the fixed pulley mounting frame 130, and the fixed pulley mounting frame 130 is used for being fixed to the first variable pitch bearing 10.

[0111] It can be understood that with the movement of the movable pulley 220 and the second variable pitch bearing 20, when the second variable pitch bearing 20 moves to the air, the second variable pitch bearing 20 can have a certain swing, for example, affected by wind blowing, in this case, the fixed pulley can deviate from the original initial vertical plane, that is, can deviate from the plane where the fixed joint 110 and the first fixed pulley 120 are located, and the fixed joint 110 and the first fixed pulley 120 under rigid connection cannot swing synchronously with the movable pulley 220, which can cause the first steel wire rope 300 to easily derail at the first fixed pulley 120 and the movable pulley 220.

[0112] In the replacement device provided in the embodiments of the utility model, the fixed joint 110 and the first fixed pulley 120 are rotatably arranged on the fixed pulley mounting frame 130, and the rotatable structure can allow the fixed joint 110 and the first fixed pulley 120 to adaptively adjust with the first steel wire rope 300, so as to ensure that the coupling points of the first steel wire rope 300 and the first fixed pulley 120, the coupling points of the first steel wire rope 300 and the fixed joint 110 and the coupling points of the first steel wire rope 300 and the movable pulley 220 are in the same plane, thereby avoiding the derailment problem and effectively improving the safety and stability in the hoisting process.

[0113] Referring to Figure 2 and Figure 3In the optional embodiment of the utility model, the replacing device further comprises a first auxiliary connecting frame 700 and a second auxiliary connecting frame 800, the first auxiliary connecting frame 700 is connected with the second auxiliary connecting frame 800 through fasteners, the first auxiliary connecting frame 700 is used for being fixed to the first variable pitch bearing 10, and the second auxiliary connecting frame 800 is used for being fixed to the second variable pitch bearing 20. Specifically, the first auxiliary connecting frame 700 can be fixed on the first variable pitch bearing 10 by borrowing the connecting bolt of the first variable pitch bearing 10 and the blade, and the second auxiliary connecting frame 800 can be fixed on the second variable pitch bearing 20 by borrowing the blade mounting hole of the second variable pitch bearing 20 through a double-headed bolt.

[0114] In use, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 can be arranged on the first variable pitch bearing 10 and the second variable pitch bearing 20 first, so that when the connection between the second variable pitch bearing 20 and the hub 30 is released, the first variable pitch bearing 10 can provide a temporary fulcrum for the second variable pitch bearing 20 through the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800, so that the second variable pitch bearing 20 can be prevented from falling accidentally, thereby effectively improving the safety during hoisting.

[0115] Figure 13 It is the assembly schematic view of the static force auxiliary hoisting assembly provided by the utility model embodiment.

[0116] Referring to Figure 13 In the optional embodiment of the utility model, the replacing device further comprises a static force auxiliary hoisting assembly 900, the static force auxiliary hoisting assembly 900 comprises a sling 910, a second fixed pulley 920, a second steel wire rope 930 and a second driving part 940, the first end of the sling 910 is used for being fixed to the first variable pitch bearing 10 so as to establish a hoisting anchor point on the first variable pitch bearing 10, the second fixed pulley 920 is arranged at the second end of the sling 910, and the second fixed pulley 920 needs to be arranged directly above the maintenance opening of the second variable pitch bearing 20, the first end of the second steel wire rope 930 is connected with the second driving part 940, the second end of the second steel wire rope 930 extends towards the ground after passing through the second fixed pulley 920, and the second driving part 940 is used for driving the second end of the second steel wire rope 930 to move in the vertical direction.

[0117] Specifically, the first variable pitch bearing 10 can be used for the bolt connected with the blade, one hoisting anchor point is arranged on each of the two first variable pitch bearings 10, correspondingly, two lifting belts 910 can be arranged, the two lifting belts 910 can be fixed on the two hoisting anchor points on the two sides of the hub 30 through shackles respectively, and the two lifting belts 910 can intersect above the maintenance opening of the second variable pitch bearing 20, and the second fixed pulley 920 is fixed to the intersection of the two lifting belts 910 through a hook; the second steel wire rope 930 is wound on the second fixed pulley 920, and the first end of the second steel wire rope 930 is connected with the second driving component 940, and a hook is arranged at the second end of the second steel wire rope 930.

[0118] The second driving component 940 is similar to the foregoing driving assembly 400, and existing equipment such as a hoist 430 or a hoisting component can be selected, and the specific position of the second driving component 940 is also similar to that of the foregoing driving assembly 400, and the second driving component 940 can be arranged on the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground, when the second driving component 940 is arranged on the ground, the second driving component 940 can be integrated with the foregoing rope collecting component 440, and specifically, adaptive selection can be made according to actual conditions.

[0119] It can be understood that the driving assembly 400 and the first steel wire rope 300 and other components need to meet the load of the second variable pitch bearing 20, so the structure needs to have a certain strength, which leads to a relatively heavy weight of these components, and it is difficult to manually carry; in the embodiment of the utility model, the static auxiliary hoisting assembly 900 can be used for preliminary installation of the foregoing various components, for example, the hoist 430 is hoisted into the hub 30 by the static auxiliary hoisting assembly 900, so that the difficulty of equipment replacement and installation can be effectively reduced, and the overall construction period can be shortened.

[0120] It should be noted that when the first fixed assembly 100, the movable assembly 200, the driving assembly 400, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 and other components are arranged on the first variable pitch bearing 10 or the second variable pitch bearing 20, they can be connected and fixed by means of the bolts connected with the blades of the first variable pitch bearing 10 and the second variable pitch bearing 20, so that the interface size of each component can be adjusted according to the different distribution sizes of the bolts connected with the blades of the first variable pitch bearing 10 and the second variable pitch bearing 20 in different models, so as to realize the adaptation of different models.

[0121] The following shows a replaceable variable pitch bearing replacement method corresponding to the replacement device provided by the utility model.

[0122] Step one: the second variable pitch bearing 20 is rotated to the upper side of the hub 30 by using the disc rotation to rotate the impeller;

[0123] Step two: install the movable pulley 220, the first fixed pulley 120, the fixed joint 110, the mounting seat in the driving assembly 400, and the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800;

[0124] Step three: remove the fastening nuts of the outer ring of the second variable pitch bearing 20;

[0125] Step four: rotate the impeller again by using the turning, and rotate the second variable pitch bearing 20 to the position directly below;

[0126] Step five: use the static auxiliary hoisting assembly 900 to lift the hoist 430 and the first steel wire rope 300 through the second variable pitch bearing 20 maintenance opening to the inside of the hub 30, and install them on the mounting seat;

[0127] Step six: pass the first steel wire rope 300 over the first fixed pulley 120 and the movable pulley 220, and fix it on the fixed joint 110;

[0128] Step seven: remove the connecting bolts between the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800;

[0129] Step eight: operate the two hoists 430 and the hand-operated hoist in the angle adjusting assembly 600, and cooperate with each other to make the second variable pitch bearing 20 keep a angle and exit the bolt rod on the hub 30;

[0130] Step nine: after the second variable pitch bearing 20 exits the bolt rod, lower the hand-operated hoist to make the second variable pitch bearing 20 in a horizontal state, and then disconnect the hand-operated hoist from the second variable pitch bearing 20;

[0131] Step ten: continue to lower the second variable pitch bearing 20 by operating the two hoists 430 until it reaches the ground;

[0132] The installation of the new second variable pitch bearing 20 can be performed by reversing the above steps. It should be noted that the turning of the second variable pitch bearing 20 to the position directly above in step one is to facilitate the installation of the movable pulley 220, the first fixed pulley 120, the fixed joint 110, the mounting seat in the driving assembly 400, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800, and to facilitate the removal of the fastening nuts of the outer ring of the second variable pitch bearing 20, which can effectively improve the safety and convenience of the operation and reduce the operation time.

[0133] It should be further noted that after the fastening nuts of the outer ring of the second variable pitch bearing 20 are removed in step three, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 serve to connect the second variable pitch bearing 20 and the hub 30, which can prevent the second variable pitch bearing 20 from being separated from the hub 30 when the second variable pitch bearing 20 is rotated to the position directly below in step four.

[0134] It should be noted that in step five, the first steel wire rope 300 of the upper rope outlet end of the hoist 430 needs to be left about 2m for the winding and fixing of the first steel wire rope 300 in step six, and the rope head cannot be left too long to avoid burdening the hoist 430.

[0135] It should be noted that in step eight, the two hoists 430 can be controlled separately or synchronously, and the purpose is to control the angle and position of the second variable pitch bearing 20 through three points in the initial stage of disassembling and the end stage of installing the second variable pitch bearing 20, so as to facilitate the hole alignment installation of the second variable pitch bearing 20.

[0136] It should be noted that the technical solutions in each embodiment of the utility model can be combined with each other, but the basis of the combination is that the ordinary skilled person in the art can realize it; when the combination of the technical solutions is contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, that is, it does not belong to the protection scope of the utility model.

[0137] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the utility model.

Claims

1. A replacement device for a wind turbine variable pitch bearing, characterized in that, The utility model relates to a wind turbine variable pitch system, comprising: a first fixed component (100) comprising a fixed joint (110) for fixing to a first variable pitch bearing (10); a movable pulley (220) located on one side of the fixed joint (110), the movable pulley (220) being used for fixing to a second variable pitch bearing (20); a first steel wire rope (300) with a first end fixed to the fixed joint (110) and a second end wound around the movable pulley (220); a drive assembly (400) coupled to the second end of the first steel wire rope (300), the drive assembly (400) being adapted to be fixed to the first variable pitch bearing (10), the second variable pitch bearing (20) or the ground, the drive assembly (400) being used for controlling the movement of the first steel wire rope (300); in the case where the drive assembly (400) is arranged on the second variable pitch bearing (20) or the ground, the first fixed component (100) further comprises a first fixed pulley (120) for fixing to the first variable pitch bearing (10), the movable pulley (220) being located between the fixed joint (110) and the first fixed pulley (120), and the second end of the first steel wire rope (300) being wound around the movable pulley (220) and the first fixed pulley (120) in sequence.

2. The replacement device for a wind turbine generator variable pitch bearing according to claim 1, characterized in that, The drive assembly (400) comprises: a hoist (430) through which the second end of the first steel wire rope (300) passes, the hoist (430) being adapted to be fixed to the first variable pitch bearing (10), the second variable pitch bearing (20) or the ground, the hoist (430) being used for controlling the movement of the first steel wire rope (300); a rope collecting component (440) arranged on the path of the second end of the first steel wire rope (300) and located on the side of the lower rope outlet of the hoist (430), the rope collecting component (440) being used for winding and unwinding the first steel wire rope (300).

3. The replacement device for a wind turbine generator variable pitch bearing according to claim 2, characterized in that, The rope collecting component (440) comprises: a rope collecting support (441) arranged on the path of the second end of the first steel wire rope (300) and located on the side of the lower rope outlet of the hoist (430); a transmission shaft (442) rotatably arranged on the rope collecting support (441); a motor (443) connected to the transmission shaft (442) and used for driving the transmission shaft (442) to rotate; a rope collecting cylinder (444) sleeved on the transmission shaft (442), the second end of the first steel wire rope (300) being fixed to the rope collecting cylinder (444).

4. The replacement device for a wind turbine generator variable pitch bearing according to claim 3, characterized in that, The rope collecting cylinder (444) comprises a cylinder body (4441) and a transmission plate (4442), the cylinder body (4441) being sleeved on the outside of the transmission plate (4442), or the transmission plate (4442) being arranged on the end of the cylinder body (4441); the second end of the first steel wire rope (300) is fixed to the cylinder body (4441), and the transmission plate (4442) is rotatably sleeved on the transmission shaft (442). The rope collecting component (440) further comprises a spring (445), a friction sheet (446) and a locking piece (447), the spring (445), the friction sheet (446) and the locking piece (447) are sequentially sleeved on the transmission shaft (442), one side of the friction sheet (446) away from the spring (445) is attached to the transmission plate (4442), the locking piece (447) is threadedly connected with the transmission shaft (442), and the friction sheet (446) is used to drive the transmission plate (4442) to rotate under the driving of the transmission shaft (442).

5. The replacement apparatus for a wind turbine variable pitch bearing according to claim 1, wherein, In the case that the driving assembly (400) is arranged on the ground, the replacement device further comprises: A guide rope support (510) arranged on the passing path of the second end of the first steel wire rope (300) and used for being arranged at the maintenance opening of the second variable pitch bearing (20); A guide rope roller (520) rotatably arranged on the guide rope support (510) and coupled with the second end of the first steel wire rope (300).

6. The replacement apparatus for a wind turbine variable pitch bearing according to claim 1, wherein, The driving assembly (400) comprises a hoisting component, the second end of the first steel wire rope (300) is fixed to the hoisting component, the hoisting component is suitable for being fixed to the first variable pitch bearing (10), the second variable pitch bearing (20) or the ground, and the hoisting component is used for controlling the movement of the first steel wire rope (300).

7. The replacement device for a wind turbine variable pitch bearing according to any one of claims 1 to 6, characterized in that, The first fixing assembly (100) further comprises a fixed pulley mounting rack (130) suitable for being fixed to the first variable pitch bearing (10); In the case that the first fixing assembly (100) comprises the first fixed pulley (120), the fixed joint (110) is rotatably arranged on one side of the fixed pulley mounting rack (130), and the first fixed pulley (120) is rotatably arranged on the other side of the fixed pulley mounting rack (130).

8. The replacement device for a wind turbine variable pitch bearing according to any one of claims 1 to 6, characterized in that, Further comprising: An adjusting support (610) suitable for being mounted to the front hole of the hub (30); A lifting component (620) arranged on the adjusting support (610) and used for adjusting the angle of the second variable pitch bearing (20) relative to the horizontal plane.

9. The replacement device for a wind turbine variable pitch bearing according to any one of claims 1 to 6, characterized in that, Further comprising: A first auxiliary connecting rack (700) used for being fixed to the first variable pitch bearing (10); A second auxiliary connecting rack (800) fastened with the first auxiliary connecting rack (700), the second auxiliary connecting rack (800) is used for being fixed to the second variable pitch bearing (20).

10. The replacement device for a wind turbine generator variable pitch bearing according to any one of claims 1 to 6, characterized in that, Further comprising: A sling (910) having a first end used for being fixed to the first variable pitch bearing (10); A second fixed pulley (920) arranged on the second end of the sling (910), the second fixed pulley (920) is used for being arranged directly above the maintenance opening of the second variable pitch bearing (20); A second steel wire rope (930) wound around the second fixed pulley (920). A second driving component (940) is connected with the first end of the second steel wire rope (930), and the second driving component (940) is used for driving the second end of the second steel wire rope (930) to move along the vertical direction.

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