Replacement equipment for variable pitch bearing of wind driven generator

Abstract

The invention relates to the technical field of wind power operation and maintenance, and provides replacement equipment for 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 replacement equipment provided by the invention, 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 present invention relates to the technical field of wind power operation and maintenance, and in particular to a device for replacing a variable pitch bearing of a wind turbine generator. Background Art

[0002] The variable pitch bearing of a wind turbine is the core component that connects the hub and the blades. During long-term operation, the variable pitch bearing is prone to damage due to factors such as alternating loads, extreme weather or insufficient maintenance, and needs to be replaced. The current conventional replacement method requires the impeller to be disassembled from the unit as a whole, hoisted to the ground, the blades and the old variable pitch bearing are separated, and the new variable pitch bearing is assembled with the blades and then hoisted back to the hub. During this process, the impeller is large in size, extremely heavy, and needs to be flipped at high altitude during hoisting, which places high demands on the hoisting equipment and construction site. Generally, a large crane is required to complete the overall disassembly and installation of the impeller.

[0003] However, wind farms in mountainous areas often face problems such as inconvenient transportation and small sites. Large cranes find it difficult to enter the site, and road construction and site repair are usually required, which leads to a surge in construction costs and a longer cycle. Therefore, the replacement device for the pitch bearing urgently needs to be optimized and improved. Summary of the invention

[0004] The present invention provides a device for replacing a variable pitch bearing of a wind turbine, which is used to solve the problems in the prior art of relying on a large crane or a crawler crane for replacing the variable pitch bearing and having strict requirements on the construction site. Through the coordinated action of a first fixed component, a movable pulley, a first steel wire rope and a driving component, the strict requirements of traditional lifting on site space and equipment tonnage can be reduced.

[0005] The present invention provides a device for replacing a variable pitch bearing of a wind turbine generator, comprising: A first fixing assembly, comprising a fixing joint, wherein the fixing joint is used to be fixed to a first pitch bearing; a movable pulley, located at one side of the fixed joint, and used to be fixed to the second variable pitch bearing; A first steel wire rope, a first end of which is fixed to the fixed joint and a second end of which is wound around the movable pulley; A drive assembly is coupled to the second end of the first steel wire rope, the drive assembly is suitable for being fixed to the first variable pitch bearing, the second variable pitch bearing or the ground, and the drive assembly is used to control the movement of the first steel wire rope; when the drive assembly is arranged on the second variable pitch bearing or the ground, the first fixing assembly also includes a first fixed pulley for fixing 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 sequentially wound around the movable pulley and the first fixed pulley.

[0006] According to the device for replacing a pitch bearing of a wind turbine provided by the present invention, the drive assembly comprises: A hoist, wherein the second end of the first steel wire rope is passed through the hoist, the hoist is suitable for being 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; The rope collecting component is arranged on the path of the second end of the first steel wire rope and is located on the side of the lower rope outlet of the hoist. The rope collecting component is used to collect and release the first steel wire rope.

[0007] According to the device for replacing a pitch bearing of a wind turbine provided by the present invention, the rope collecting component comprises: A rope collecting bracket is arranged on the path of the second end of the first steel wire rope and is located on one side of the lower rope outlet of the hoist; A transmission shaft is rotatably disposed on the rope collecting bracket; A motor connected to the transmission shaft and used to drive the transmission shaft to rotate; The rope collecting drum is sleeved on the transmission shaft, and the second end of the first steel wire rope is fixed to the rope collecting drum.

[0008] According to the replacement device for the variable pitch bearing of a wind turbine provided by the present invention, the rope collecting drum comprises a drum body and a transmission plate, the drum body is sleeved on the outside of the transmission plate, or the transmission plate is arranged at the end of the drum body; the second end of the first steel wire rope is fixed to the drum body, and the transmission plate is rotatably sleeved on the transmission shaft; The rope collecting component also 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, and the side of the friction plate away from the spring is in contact with the transmission plate. The locking piece is threadedly matched with the transmission shaft. The friction plate is used to drive the transmission plate to rotate under the drive of the transmission shaft.

[0009] According to the replacement device for the variable pitch bearing of a wind turbine provided by the present invention, when the drive assembly is arranged on the ground, the replacement device further comprises: A guide rope bracket, the guide rope bracket is arranged in the path of the second end of the first steel wire rope and is used to be arranged at the inspection port of the second pitch bearing; The guide rope roller is rotatably arranged on the guide rope bracket and coupled with the second end of the first steel wire rope.

[0010] According to the replacement equipment for the variable pitch bearing of a wind turbine provided by the present invention, the driving assembly includes 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 to control the movement of the first steel wire rope.

[0011] According to the replacement device for the variable pitch bearing of a wind turbine provided by the present invention, the first fixing assembly further comprises a fixed pulley mounting frame, and the fixed pulley mounting frame is suitable for being fixed to the first variable pitch bearing; In the case where the first fixing assembly includes the first fixed pulley, the fixing joint is rotatably disposed on one side of the fixed pulley mounting frame, and the first fixed pulley is rotatably disposed on the other side of the fixed pulley mounting frame.

[0012] The replacement device for the variable pitch bearing of a wind turbine provided by the present invention further comprises: An adjustment bracket adapted to be mounted to the front hole of the wheel hub; A lifting component is provided on the adjustment bracket and is used for adjusting the angle of the second variable pitch bearing relative to a horizontal plane.

[0013] The replacement device for the variable pitch bearing of a wind turbine provided by the present invention further comprises: A first auxiliary connecting frame, used for being fixed to the first pitch bearing; The second auxiliary connecting frame is connected to the first auxiliary connecting frame fastener, and the second auxiliary connecting frame is used to be fixed to the second pitch bearing.

[0014] The replacement device for the variable pitch bearing of a wind turbine provided by the present invention further comprises: a sling, a first end of which is used to be fixed to the first pitch bearing; a second fixed pulley, disposed at a second end of the sling, the second fixed pulley being used to be disposed just above an inspection opening of the second pitch bearing; A second steel wire rope is wound around the second fixed pulley; The second driving component is connected to 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.

[0015] In the replacement device provided by the present invention, when in use, the fixed joint in the first fixed assembly is fixed to the unreplaced first variable pitch bearing by bolt connection, so that the first variable pitch bearing can be used to form a stable fulcrum for the hoisting of the first wire rope. Secondly, the movable pulley is fixed to the second variable pitch bearing, so that a coupling basis can be provided between the first wire rope and the second variable pitch bearing. Based on this, the first wire rope takes the fixed joint as the starting end, passes through the movable pulley, and is coupled with the driving assembly after the direction is changed. In this way, a quick-release and quick-install temporary hoisting system can be formed with modular components. When the driving assembly releases the first wire rope, the increase in the length of the wire rope segments on both sides of the movable pulley causes the old second variable pitch bearing to descend synchronously with the movable pulley; when the driving assembly recycles the wire rope, the movable pulley drives the new second variable pitch bearing to rise under the action of the driving assembly and the first wire rope. Through the synergistic effect of the fixed joint, the movable pulley, the first wire rope and the driving assembly, the replacement of the second variable pitch bearing can be achieved.

[0016] In addition, the drive assembly can be set on the first variable pitch bearing, the second variable pitch bearing, or the ground. This allows the replacement equipment to have a variety of flexible setting schemes in actual use, and can provide targeted solutions for different actual environments and actual needs, thereby effectively improving construction efficiency and reducing the difficulty of actual construction. Secondly, when the drive assembly is set on the ground, it is also convenient for the operator to directly implement lifting control, which can reduce the difficulty of installation and control of the replacement device.

[0017] Compared with the prior art, in the replacement equipment provided by the present invention, by directly connecting the first fixed component with the first variable pitch bearing, the load of the second variable pitch bearing that needs to be borne by a large crane in the traditional method can be transferred to the original structure of the wind turbine such as the first variable pitch bearing for bearing, so that the dependence of the disassembly and assembly process of the second variable pitch bearing on the large crane can be reduced, and the restrictions on the replacement of the second variable pitch bearing caused by factors such as large cranes can be solved; at the same time, the local lifting method of the second variable pitch bearing also eliminates the necessity of disassembling and flipping the impeller as a whole. This structural design not only reduces the strict requirements of traditional lifting on site space and equipment tonnage, but also allows only small equipment to complete the replacement operation in mountainous areas or narrow terrains, which can effectively reduce the difficulty of replacing the second variable pitch bearing. In addition, a single operation only requires the disassembly and assembly of a single second variable pitch bearing to be replaced, so that the remaining blades and the first variable pitch bearing can maintain their original state. This targeted operation method not only reduces the disturbance to other components of the unit, but also effectively shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall assembly of the replacement device provided by an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the assembly of the local structure of the lifting device provided by an embodiment of the present invention at the variable pitch bearing.

[0021] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0022] Figure 4 It is a schematic diagram of the assembly of the partial structure of the lifting device provided by an embodiment of the present invention at the bottom of the tower.

[0023] Figure 5 It is a schematic diagram of the shaft side structure of the drive assembly provided in an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the axial structure of the rope collecting component provided in an embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the rope collecting component provided by an embodiment of the present invention when viewed from a top perspective.

[0026] Figure 8 yes Figure 7 Schematic diagram of the local enlarged structure at point B in the middle.

[0027] Fig. 9 It is a schematic diagram of the axial structure of the guide rope assembly provided in an embodiment of the present invention.

[0028] Fig.10 It is a schematic diagram of the assembly of the angle adjustment component provided in an embodiment of the present invention.

[0029] Fig.11 It is a schematic diagram of the axial structure of the angle adjustment assembly provided in an embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of the axial structure of the first fixing assembly provided in an embodiment of the present invention.

[0031] Fig.13 It is a schematic diagram of the assembly of the static auxiliary lifting assembly provided in an embodiment of the present invention.

[0032] Reference numerals: 10: first variable pitch bearing; 20: second variable pitch bearing; 30: wheel hub; 40: tower; 100: first fixed assembly; 110: fixed joint; 120: first fixed pulley; 130: fixed pulley mounting frame; 200: movable assembly; 210: fixed base; 220: movable pulley; 300: first wire rope; 400: driving assembly; 410: mounting frame; 420: guide rope wheel; 430: hoist; 440: rope collecting component; 441: rope collecting bracket; 442: transmission shaft; 443: motor; 444: rope collecting drum; 4441: drum body; 4442: transmission plate; 445: spring; 446 : Friction plate; 447: Locking piece; 448: Pressure plate; 449: Copper sleeve; 500: Guide rope assembly; 510: Guide rope bracket; 520: Guide rope roller; 600: Angle adjustment assembly; 610: Adjustment bracket; 611: Bracket; 6111: Upper support surface; 6112: Lower support surface; 612: Anti-loosening nut; 613: Tensioning bolt; 614: Limiting plate; 620: Lifting component; 700: First auxiliary connecting frame; 800: Second auxiliary connecting frame; 900: Static auxiliary lifting assembly; 910: Sling; 920: Second fixed pulley; 930: Second wire rope; 940: Second driving component. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0035] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Figure 1 It is a schematic diagram of the overall assembly of the replacement device provided by an embodiment of the present invention.

[0038] For ease of understanding, the present invention first briefly describes the variable pitch bearing and its related components. Figure 1 The pitch bearing is used to connect the hub 30 in the rotor and the blades in the rotor. This article takes a three-blade generator as an example. Three mounting parts are provided on the hub 30. The angle between the three mounting parts is 120 degrees. Each mounting part is respectively installed with a pitch bearing. The outer side of the pitch bearing is used to connect and fix the corresponding blades.

[0039] Among them, a plurality of bolt holes are arranged around the edge of the variable pitch bearing, and the bolt holes are used for bolt connection with the hub 30. An inspection port is provided on each variable pitch bearing. The plane where each variable pitch bearing is located is inclined toward the front hole of the hub 30. In other words, when any variable pitch bearing is rotated to directly below the hub 30, one end close to the front hole of the hub 30 is slightly higher than the other end opposite to itself, that is, the variable pitch bearings are set at an angle a with the horizontal plane. For specific reasons, please refer to the prior art.

[0040] It should be noted that the replacement device for wind turbine pitch bearings provided by the embodiment of the present invention (hereinafter referred to as the replacement device for ease of description) is not limited to three-blade generators, but can also be two-blade generators, four-blade generators, or five-blade generators. When the replacement device is used for other types of generators, the setting of the replacement device can refer to the example given in this article for the three-blade generator, which will not be described in detail here. It should also be noted that other structures of wind turbines can refer to the prior art, which will not be described in detail here.

[0041] It should also be noted that the replacement device provided in the embodiment of the present invention only targets one pitch bearing in each replacement process. For the sake of convenience of explanation, the pitch bearing to be replaced is referred to as the second pitch bearing 20, and the other pitch bearings except the pitch bearing to be replaced are referred to as the first pitch bearing 10. It should be noted that after the second pitch bearing 20 to be replaced is replaced in the first replacement process, if other pitch bearings also need to be replaced, then when the first pitch bearing 10 in the first replacement process is replaced, that is, in the second replacement process, the first pitch bearing 10 is the second pitch bearing 20 in the second replacement process, and the second pitch bearing 20 that has been replaced in the first replacement process is the first pitch bearing 10 in the second replacement process.

[0042] Figure 2 It is a schematic diagram of assembling a local structure of a lifting device provided by an embodiment of the present invention at a pitch bearing; Figure 3 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Figure 4 It is a schematic diagram of the assembly of the partial structure of the lifting device provided by an embodiment of the present invention at the bottom of the tower 40.

[0043] See also Figures 1 to 4 An embodiment of the present invention provides a replacement device, which includes a lifting device, which includes a first fixed component 100, a movable component 200, a first steel wire rope 300 and a driving component 400. The first fixed component 100 includes a fixed joint 110. The fixed joint 110 can specifically adopt existing components such as a wedge joint to facilitate detachable connection. When in use, the fixed joint 110 is used to be fixed to the bottom of the first variable pitch bearing 10. Specifically, the fixed joint 110 can be fixed to the first variable pitch bearing 10 by using the connecting bolts between the first variable pitch bearing 10 and the blade.

[0044] The movable assembly 200 includes a fixed base 210 and a movable pulley 220. The movable pulley 220 is rotatably disposed on the fixed base 210 via a pin shaft. When in use, the fixed base 210 is used to be fixed to the second pitch bearing 20. Specifically, the fixed base 210 can be fixed to the bolt hole on the edge of the second pitch bearing 20 for connecting the blades by fasteners such as bolts.

[0045] When in use, the first end of the first steel wire rope 300 is fixed to the fixed joint 110, the second end of the first steel wire rope 300 extends downward, passes through the movable pulley 220 below, and then extends upward. The driving assembly 400 is arranged on the walking path of the first steel wire rope 300 and is coupled with the first steel wire rope 300. The driving assembly 400 is used to drive the first steel wire rope 300 to move. When in use, there are three optional situations for the position of the driving assembly 400, situation 1: the driving assembly 400 can be arranged on the first pitch bearing 10; situation 2: the driving assembly 400 can be arranged on the second pitch bearing 20; situation 3: the driving assembly 400 can be arranged on the ground, that is, the root of the tower 40.

[0046] It should be noted that in case 2 and case 3, since the second end of the first steel wire rope 300 will change direction after passing through the movable pulley 220, a first fixed pulley 120 needs to be provided in the first fixed assembly 100, and the direction of the second end of the first steel wire rope 300 is converted for the second time through the first fixed pulley 120, so as to facilitate its coupling with the driving assembly 400. Specifically, the first end of the first steel wire rope 300 is fixed to the fixed joint 110, and the second end of the first steel wire rope 300 is sequentially wound around the movable pulley 220 and the first fixed pulley 120, and then coupled with the driving assembly 400, wherein, when the driving assembly 400 is located on the ground, the second end of the first steel wire rope 300 needs to extend all the way to the ground after leaving the first fixed pulley 120.

[0047] It should also be noted that the fixed joint 110 and the first fixed pulley 120 are arranged at an interval, and the specific position between the two can be set adaptively. The embodiment of the present invention does 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 position interference with the winding of the first steel wire rope 300.

[0048] The movement principle of the lifting device is shown below.

[0049] Disassembling the old second variable pitch bearing 20: After turning on the driving device, the driving device will control the first steel wire rope 300 to move from the driving device toward the first fixed pulley 120, the first steel wire rope 300 will change the rotation 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 toward 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 effect of the gravity of the second variable pitch bearing 20 itself, the first steel wire ropes 300 on both sides of the movable pulley 220 will gradually become longer, that is, the movable pulley 220 will move in the vertical direction away from the fixed joint 110 and the first fixed pulley 120, and the second variable pitch bearing 20 fixedly connected to the movable pulley 220 will move toward the ground. This process is the descending process of the old variable pitch bearing.

[0050] Replace the new second variable pitch bearing 20: After the second variable pitch bearing 20 is completely lowered to the ground, the movable component 200 is removed from the second variable pitch bearing 20 as a whole and installed on the new second variable pitch bearing 20. After the driving device is turned on, the driving device will control the first wire rope 300 to move from the first fixed pulley 120 toward the driving device; the first wire rope 300 between the first wire rope 300 and the movable pulley 220 will automatically move from the pulley 220 toward the first fixed pulley 120. As the first wire rope 300 continues to move, the first wire ropes 300 on both sides of the movable pulley 220 will gradually shorten, that is, in the vertical direction, the movable pulley 220 will move toward the fixed joint 110 and the first fixed pulley 120, and the second variable pitch bearing 20 fixedly connected to the movable pulley 220 will also move toward the fixed joint 110 and the first fixed pulley 120. This process is the rising process of the new variable pitch bearing.

[0051] With the coordinated use of the above two situations, the second variable pitch bearing 20 can be replaced.

[0052] See also Figures 2 to 4It can be understood that in the replacement device provided by the embodiment of the present invention, when in use, the fixing joint 110 in the first fixing assembly 100 is fixed to the first pitch bearing 10 that has not been replaced by bolt connection, so that the first pitch bearing 10 can be used to form a stable fulcrum for the hoisting of the first steel wire rope 300. Secondly, the movable pulley 220 is fixed to the second pitch bearing 20, so that a coupling basis can be provided between the first steel wire rope 300 and the second pitch bearing 20. Based on this, the first steel wire rope 300 takes the fixed joint 110 as the starting end, passes through the movable pulley 220, and is coupled with the driving assembly 400 after the direction is changed. In this way, a quick-release and quick-installation temporary lifting system can be formed with modular components. When the driving assembly 400 releases the first steel wire rope 300, the increase in the length of the steel wire rope segments on both sides of the movable pulley 220 causes the old second variable pitch bearing 20 to descend synchronously with the movable pulley 220; when the driving assembly 400 recycles the steel wire rope, the movable pulley 220 drives the new second variable pitch bearing 20 to rise under the action of the driving assembly 400 and the first steel wire rope 300. Through the coordinated action of the fixed joint 110, the movable pulley 220, the first steel wire rope 300 and the driving assembly 400, the replacement of the second variable pitch bearing 20 can be achieved.

[0053] In addition, the drive assembly 400 can be set on the first variable pitch bearing 10, or on the second variable pitch bearing 20, or on the ground. This allows the replacement device to have a variety of flexible setting schemes during actual use, and can provide targeted solutions for different actual environments and actual needs, thereby effectively improving construction efficiency and reducing the difficulty of actual construction. Secondly, when the drive assembly 400 is set on the ground, it can also be convenient for the operator to directly implement lifting control, which can reduce the difficulty of installation and control of the replacement device.

[0054] Compared with the prior art, in the replacement equipment provided in the embodiment of the present invention, the first fixing component 100 is directly connected to the first pitch bearing 10, so that the load of the second pitch bearing 20 that needs to be borne by a large crane in the traditional method can be transferred to the original structure of the wind turbine such as the first pitch bearing 10 for bearing. In this way, the dependence of the disassembly and assembly process of the second pitch bearing 20 on large cranes can be reduced, thereby solving the limitations on the replacement of the second pitch bearing 20 caused by factors such as large cranes; at the same time, the local lifting method of the second pitch bearing 20 also eliminates the necessity of disassembling and flipping the impeller as a whole. This structural design not only reduces the strict requirements of traditional lifting on site space and equipment tonnage, but also makes it possible to complete the replacement operation with only small equipment in mountainous areas or narrow terrain, which can effectively reduce the difficulty of replacing the second pitch bearing 20. In addition, a single operation only requires the disassembly and assembly of a single second variable pitch bearing 20 to be replaced, so that the remaining blades and the first variable pitch bearing 10 can maintain their original state. This targeted operation method not only reduces the disturbance to other components of the unit, but also effectively shortens the construction period.

[0055] See also Figure 2 In an optional embodiment of the present invention, when setting up a lifting device, a lifting device may be provided on both sides of the second variable pitch bearing 20, respectively. The line connecting the positions of the movable pulleys 220 in the two sets of lifting devices on the second variable pitch bearing 20 needs to pass through the center of the second variable pitch bearing 20. In this way, the overturning problem caused by the shift of the center of gravity can be avoided. As described above, the number of lifting devices can be adaptively set according to factors such as the weight and stability of the second variable pitch bearing 20 to be replaced, such as three or four lifting devices. It can be understood that the lifting devices symmetrically arranged on both sides of the present embodiment can lift or lower the second variable pitch bearing 20 from both sides of the second variable pitch bearing 20, respectively. This two-lifting point approach can simplify the required components and ensure the stability of the second variable pitch bearing 20.

[0056] In an embodiment of the present invention, the first fixed component 100 and the driving component 400 are both arranged on the first variable pitch bearing 10. In some optional embodiments, the first fixed component 100 and the driving component 400 can also be connected to components such as the hub 30 through additional components, as long as a suitable fulcrum is provided for the lifting device in the cabin. Specifically, it can be adaptively selected according to actual conditions.

[0057] Figure 5 It is a schematic diagram of the shaft side structure of the drive assembly provided in an embodiment of the present invention.

[0058] See also Figure 3 and Figure 5In an optional embodiment of the present invention, the drive assembly 400 includes a hoist 430, a mounting frame 410, a guide rope wheel 420 and a rope collecting component 440, wherein the hoist 430, the mounting frame 410 and the guide rope wheel 420 are connected as a whole by fasteners; the hoist 430 includes an upper rope outlet and a lower rope outlet, which are relatively 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 to be installed 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 to the first variable pitch bearing 10 by using the connecting bolts between 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 to avoid interference with the threading of the first steel wire rope 300.

[0059] When in use, after the second end of the first steel wire rope 300 leaves the automatic pulley 220 and passes around the first fixed pulley 120, it will enter the hoist 430 from the upper rope outlet of the hoist 430. Inside the hoist 430, the second end of the first steel wire rope 300 will be coiled on the inner gear ring with groove and compressed by the rope pressing mechanism, and then leave the hoist 430 from the lower rope outlet; after leaving the hoist 430, the first steel wire rope 300 will pass through the guide rope wheel 420 and continue to extend to the far end. The brake motor on the hoist 430 will drive the inner gear ring with groove to rotate after deceleration through the worm gear and gear pair, thereby realizing the movement of the first steel wire rope 300.

[0060] The second steel wire rope 930 needs to retain a sufficient length after leaving the hoist 430 to meet the height change requirement of the movable pulley 220 during the lifting process. However, the first steel wire rope 300 on the lower rope outlet side of the hoist 430 is in a free state, which is prone to accumulation or knotting problems. In the embodiment of the present invention, the rope collecting component 440 is arranged on the moving path of the first steel wire rope 300 leaving the hoist 430. The second end of the second steel wire rope 930 is fixed to the rope collecting component 440 after leaving the hoist. The rope collecting component 440 is used to reel in the free section of the second steel wire rope 930.

[0061] 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 set on the first pitch bearing 10, the rope collecting component 440 can be set on the first pitch bearing 10, the second pitch bearing 20 or the ground; when the hoist 430 is set on the second pitch bearing 20, the rope collecting component 440 can be set on the second pitch bearing 20 or the ground; when the hoist 430 is set on the ground, the rope collecting component 440 can be set on the ground. Figure 3 This is an example where the mounting frame 410 is disposed on the first pitch bearing 10. Figure 4This is an example in which the rope collecting component 440 is arranged on the ground. Other position arrangements of the hoist 430, the mounting frame 410, the guide rope wheel 420 and the rope collecting component 440 may refer to this example and will not be described in detail herein.

[0062] It is understandable that in the replacement device provided by the embodiment of the present invention, the hoist 430 is used as a power source. During use, after the first steel wire rope 300 enters the upper rope outlet of the hoist 430 from the first fixed pulley 120, it is orderly coiled through the inner gear ring with grooves and compressed by the rope pressing mechanism. Combined with the torque amplification effect of the worm gear reduction mechanism, the moving speed and moving direction of the first steel wire rope 300 can be accurately adjusted. Secondly, the layout of the guide rope wheel 420 located directly below the lower rope outlet can constrain the rope outlet angle of the first steel wire rope 300, thereby avoiding friction loss between the first steel wire rope 300 and the edge of the equipment. The rope collecting component 440 can reel in the free section of the first steel wire rope 300 extending to the far end in real time, thereby solving the problems of entanglement, knotting or being covered with mud caused by the free fall of the rope. At the same time, the rope collecting component 440 can maintain the tension state of the rope and ensure the continuity of the lifting process.

[0063] In an optional embodiment of the present invention, different from the above-mentioned embodiment, the hoist 430 in this embodiment can be replaced by a hoisting component, that is, the hoisting component is set 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 hoisting component, and the hoisting component provides the first steel wire rope 300 with the power to move. The specific setting method is similar to the setting method of the hoist 430 in the above-mentioned embodiment, and the hoisting component can be adaptively set with reference to the setting of the hoist 430; the design of the hoisting component can refer to the prior art, such as the hoist, and specifically, it will not be repeated here.

[0064] It is understandable that in this embodiment, the hoisting component can take into account the functions of the hoist 430 and the rope collection component 440, thereby effectively simplifying the power mechanism and the power transmission chain. Compared with the worm gear reduction mechanism, the hoisting component can effectively reduce the loss of energy conversion and reduce the overall volume of the drive assembly 400. It is also understandable that when the hoist 430 or the hoisting component is set on the second variable pitch bearing 20, the connection point here can add a hanging point on the second variable pitch bearing 20, that is, in this case, a single lifting device can provide two hanging points for the second variable pitch bearing 20. This design can effectively disperse the load of the second variable pitch bearing 20, thereby improving the stability and safety during the hoisting process.

[0065] In other optional embodiments of the present invention, the first fixed pulley 120 and the movable component 200 can be omitted, and the hoist 430 can be directly fixed on the second variable pitch bearing 20, and the first end of the first steel wire rope 300 can be fixed on the fixed joint 110, and the second end of the first steel wire rope 300 can be freely lowered to the ground, or the second end of the first steel wire rope 300 can be fixed on the ground; the hoist 430 can directly carry the second variable pitch bearing 20 along the first steel wire rope 300 to vertically climb or descend. For details, please refer to the adaptive design of the elevator in the prior art, which will not be repeated herein.

[0066] Figure 6 It is a schematic diagram of the axial structure of the rope collecting component provided in an embodiment of the present invention.

[0067] See also Figure 6 In an optional embodiment of the present invention, the rope collecting component 440 includes a rope collecting bracket 441, a rope collecting drum 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 drum 444, and the rope collecting drum 444 is sleeved on the transmission shaft 442. The transmission shaft 442 is rotatably arranged on the rope collecting bracket 441. The rope collecting bracket 441 is used to be arranged on the travel path of the second end of the first steel wire rope 300 and is located on the lower rope outlet side of the hoist 430; the motor 443 is arranged on one side of the rope collecting bracket 441, and the output shaft of the motor 443 is connected to the transmission shaft 442. The motor 443 is used to drive the transmission shaft 442 and the rope collecting drum 444 to rotate.

[0068] It can be understood that when the hoist 430 drives the first steel wire rope 300 to move, the motor 443 will drive the transmission shaft 442 and the rope drum 444 to rotate in the corresponding direction, and the rotation of the rope drum 444 will release or recycle 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 this process, the length change of the first steel wire rope 300 on both sides during the lifting and lowering of the movable pulley 220 can be offset in real time by the release or recovery action of the rope drum 444, thereby maintaining a constant tension of the first steel wire rope 300 between the hoist 430 and the rope drum 444.

[0069] Figure 7 is a schematic diagram of the cross-sectional structure of the rope collecting component provided by an embodiment of the present invention when viewed from a top perspective; Figure 8 yes Figure 7 Schematic diagram of the local enlarged structure at point B in the middle.

[0070] See also Figure 7 and Figure 8In an optional embodiment of the present invention, the rope collecting drum 444 includes a drum body 4441 and a transmission plate 4442, and the drum body 4441 is sleeved on the outside of the transmission plate 4442, and the two are fixedly connected; or the transmission plate 4442 is arranged at the end of the drum body 4441, serving as an end plate of the drum body 4441; in the above two cases, the transmission plate 4442 is sleeved on the transmission shaft 442 and rotates with the transmission shaft 442, and the second end of the first wire rope 300 is fixed to the drum body 4441; it should be noted that, when the drum body 4441 is sleeved outside the transmission plate 4442, an end plate can also be separately provided at the end of the drum body 4441, such as Figure 7 shown.

[0071] Correspondingly, the rope collecting component 440 further includes a spring 445, a friction plate 446 and a locking member 447. The friction plate 446, the spring 445 and the locking member 447 are sequentially sleeved on the transmission shaft 442, and the side of the friction plate 446 away from the spring 445 abuts against the transmission plate 4442 and fits with the transmission plate 4442. The locking member 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 existing components such as a coil spring or a disc spring, and the locking member 447 can select existing components such as a nut.

[0072] When in use, the elastic potential energy stored in the spring 445 can be changed by rotating the locking piece 447. The cooperation between the locking piece 447 and the spring 445 will provide a pre-tightening force, so that the supporting friction plate 446 can fit tightly to the transmission plate 4442. When the transmission shaft 442 rotates, the transmission shaft 442 will drive the friction plate 446 to rotate synchronously. At this time, there is static friction between the friction plate 446 and the transmission plate 4442. Therefore, the torque of the transmission shaft 442 can be transmitted to the transmission plate 4442 through the friction plate 446.

[0073] It is understandable that as the number of layers of the first steel wire rope 300 wound on the rope drum 444 increases or decreases, the linear speed of the rope drum 444 will also increase or decrease accordingly; however, the speed of the hoist 430 is constant, so during the process of collecting or releasing the rope, there will inevitably be a mismatch between the speeds of the motor 443 and the hoist 430. The accumulation of this phenomenon will cause the first steel wire rope 300 to become tighter and tighter, or looser and looser, or first loose and then tight; when the first steel wire rope 300 is in a relaxed state, the first steel wire rope 300 on the cylinder 4441 will inevitably become more and more tangled; and when the first steel wire rope 300 becomes tighter and tighter, it will eventually exceed the load of the motor 443 and damage the motor 443.

[0074] In an optional embodiment of the present invention, the transmission shaft 442 transmits torque through the static friction contact between the friction plate 446 and the transmission plate 4442, so that the transmission plate 4442 rotates synchronously with the transmission shaft 442 under normal working conditions, and when the load of the rope drum 444 suddenly changes, relative sliding can occur between the friction plate 446 and the transmission plate 4442, thereby avoiding overload damage to the transmission system. Further, the threaded cooperation between the spring 445 and the locking member 447 produces an adjustable preload force, and the compression amount of the spring 445 can be adjusted by twisting the locking member 447 to set a constant friction torque, that is, the rope drum 444 can have 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 member 447 is adaptively adjusted accordingly, so that the problem caused by the mismatch between the speed of the motor 443 and the hoist 430 can be solved, thereby ensuring that the first steel wire rope 300 is smooth and not tangled during the rope collection process.

[0075] 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 may be increased accordingly, and the friction plates 446 are correspondingly arranged on one side of the increased transmission plates 4442 and maintained in a fitted state. Figure 7 The figure shows a case where two transmission plates 4442 are provided. Specifically, along the direction of the transmission shaft 442, a locking member 447, a spring 445, a friction plate 446, a transmission plate 4442, a transmission plate 4442 and a friction plate 446 are sequentially sleeved; when pre-tightened, the locking member 447 squeezes the spring 445, the spring 445 squeezes the first friction plate 446 and the first transmission plate 4442, and the locking force is transmitted to the second transmission plate 4442 through the cylinder 4441, and the second transmission plate 4442 squeezes the second friction plate 446. It can be understood that the stacked arrangement of multiple sets of transmission plates 4442 and friction plates 446 can expand the adjustable range of torque transmission capacity, and then the load requirements under different working conditions can be matched by increasing or decreasing the number of friction plates 446.

[0076] See also Figure 7 and Figure 8 In an optional embodiment of the present invention, the rope collecting component 440 also includes a pressure plate 448 and a copper sleeve 449. The pressure plate 448 is arranged between the spring 445 and the locking member 447, and between the spring 445 and the friction plate 446. The pressure plate 448 can increase the contact area between the locking member 447 and the spring 445, and the contact area between the spring 445 and the friction plate 446, thereby making the stress transfer between any two components more uniform; a shaft sleeve is welded in the middle of the transmission plate 4442, and the copper sleeve 449 is arranged between the shaft sleeve and the transmission shaft 442. When relative rotation occurs between the transmission plate 4442 and the transmission shaft 442, the specific relative rotation occurs between the copper sleeve 449 and the shaft sleeve, thereby preventing wear of the transmission shaft 442 and the transmission plate 4442.

[0077] Fig. 9 It is a schematic diagram of the axial structure of the guide rope assembly provided in an embodiment of the present invention.

[0078] See also Figure 3 and Fig. 9 In an optional embodiment of the present invention, when the driving assembly 400 is arranged on the ground, or when only the rope collecting component 440 is arranged on the ground, in order to avoid position interference or motion interference between the first wire rope 300 and the second variable pitch bearing 20 bracket 611, the first wire rope 300 needs to pass through the inspection port 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, and the guide rope assembly 500 includes a guide rope bracket 510 and a guide rope roller 520. The guide rope roller 520 is rotatably arranged on the guide rope bracket 510. The guide rope roller 520 can be a nylon roller. The guide rope roller 520 is used to be arranged on the path of the first wire rope 300 after leaving the first fixed pulley 120. The guide rope bracket 510 is used to be installed at the inspection port of the second variable pitch bearing 20, and can be fixed by fixing bolts and other components. The specific structure can be adjusted according to the actual structural adaptability.

[0079] It should be noted that the number of the guide rope rollers 520 can be set adaptively. Fig. 9 The figure shows a case where two guide rope rollers 520 are provided. It is understandable that the guide rope rollers 520 can prevent the first steel wire rope 300 from rubbing against the patterned aluminum plate in the middle of the second variable pitch bearing 20 during the up and down movement, and can solve the problem of the first steel wire rope 300 rubbing against the inspection port, thereby extending the service life of the second variable pitch bearing 20 and the first steel wire rope 300.

[0080] It should also be noted that when the driving group includes a hoist 430 and a rope collecting component 440, if the rope collecting component 440 is disposed 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 component 440 is located on the ground, no matter whether the hoist 430 is disposed on the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground, the guide rope assembly 500 needs to be disposed to guide the first steel wire rope 300 to pass through the inspection port on the second variable pitch bearing 20 and then extend to the ground. When the driving assembly 400 includes a hoisting component, if the hoisting component is disposed on the first variable pitch bearing 10 or the second variable pitch bearing 20, the guide rope assembly 500 can be omitted; if the hoisting component is disposed on the ground, the guide rope assembly 500 still needs to be disposed to guide the first steel wire rope 300 to pass through the inspection port on the second variable pitch bearing 20 and then extend to the ground.

[0081] Fig.10 is a schematic diagram of assembling an angle adjustment assembly provided by an embodiment of the present invention; Fig.11It is a schematic diagram of the axial structure of the angle adjustment assembly provided in an embodiment of the present invention.

[0082] See also Fig.10 and Fig.11 In an optional embodiment of the present invention, the replacement device further includes an angle adjustment assembly 600, which includes an adjustment bracket 610 and a lifting component 620. The lifting component 620 is disposed on the adjustment bracket 610. The adjustment bracket 610 is used to be installed at the front hole of the hub 30. The lifting component 620 is used to adjust the angle of the second variable pitch bearing 20 relative to the horizontal plane. Specifically, the lifting component 620 can be an electric lifting device or a manual lifting device, such as an electric hoist or a hand chain hoist. Fig.11 The figure shows the situation of a hand-cranked hoist; the adjustment bracket 610 includes a bracket 611, a lock nut 612, a tensioning bolt 613 and a limit plate 614. When in use, the hand-cranked hoist is connected to the upper anchor point of the bracket 611 through the upper hook. The bracket 611 is installed at the front hole of the wheel hub 30 and on the vertical center line of the front hole.

[0083] During installation, the upper support surface 6111 and the lower support surface 6112 of the bracket 611 are respectively fitted with the upper outer end surface and the lower inner end surface of the front hole of the wheel hub 30, and the tensioning bolt 613 is arranged at the top of the bracket 611, and the position of the tensioning bolt 613 corresponds to the position of the upper support surface 6111 of the bracket 611. The tensioning bolt 613 is adjusted upward to support the upper end surface of the front hole of the wheel hub 30, and the tensioning bolt 613 and the upper support surface 6111 of the bracket 611 will form a clamping structure, so that the bracket 611 can be tightly connected to the wheel hub 30; anti-loosening The nut 612 is arranged at the root of the tensioning bolt 613. Tightening the anti-loosening nut 612 downward until the top of the bracket 611 can prevent the tensioning bolt 613 from loosening; the limiting plate 614 is arranged at the bottom of the bracket 611, and the position of the limiting plate 614 corresponds to the position of the lower supporting surface 6112 of the bracket 611. By screwing the bolts on the limiting plate 614, the limiting plate 614 and the lower supporting surface 6112 of the bracket 611 can form a clamping structure, and then the limiting plate 614 can be tightly fitted with the lower outer end surface of the front hole of the wheel hub 30.

[0084] As mentioned above, since the impeller is actually installed at a certain angle to the ground, the installation position of the second variable pitch bearing 20 is also at an angle a to the horizontal plane; in the initial stage of disassembly and the final stage of installation of the second variable pitch bearing 20, it is necessary to coordinate operations at three locations, including the angle adjustment assembly 600 and the lifting points of the movable pulleys 220 on both sides, so that the second variable pitch shaft maintains angle a to exit or pass through the bolt rod on the hub 30.

[0085] It can be understood that the setting of the angle adjustment assembly 600 can realize the adjustment of the posture of the second variable pitch bearing 20 during the lifting process, so that it can meet the actual installation requirements of the objective angle a, and can make the replacement of equipment more humane and convenient; compared with the manual pushing method, this method is safer and more efficient. Compared with other angle adjustment devices, this structure can use the original structural features such as the hub 30 as a fulcrum to achieve quick disassembly and installation, which can effectively shorten the construction time.

[0086] Fig.12 It is a schematic diagram of the axial structure of the first fixing assembly provided in an embodiment of the present invention.

[0087] See also Fig.12 In an optional embodiment of the present invention, the first fixing assembly 100 further includes a fixed pulley mounting frame 130. When the first fixing assembly 100 includes a first fixed pulley 120, the fixing joint 110 is rotatably disposed on one side of the fixed pulley mounting frame 130, and the first fixed pulley 120 is rotatably disposed on the other side of the fixed pulley mounting frame 130. The fixed pulley mounting frame 130 is used to be fixed to the first variable pitch bearing 10.

[0088] It is understandable that as the movable pulley 220 and the second variable pitch bearing 20 move, when the second variable pitch bearing 20 moves to mid-air, the second variable pitch bearing 20 may have a certain swing, for example, affected by wind. In this case, the fixed pulley may deviate from the original initial vertical plane, that is, it may deviate from the plane where the fixed joint 110 and the first fixed pulley 120 are located. The fixed joint 110 and the first fixed pulley 120 under the rigid connection cannot swing synchronously with the movable pulley 220, which may cause the first wire rope 300 to easily derail at the first fixed pulley 120 and the movable pulley 220.

[0089] In the replacement equipment provided by the embodiment of the present invention, by making the fixed joint 110 and the first fixed pulley 120 rotatably arranged on the fixed pulley mounting frame 130, this rotatable structure can allow the fixed joint 110 and the first fixed pulley 120 to be adaptively adjusted along with the first steel wire rope 300 to ensure that the coupling point of the first steel wire rope 300 and the first fixed pulley 120, the coupling point of the first steel wire rope 300 and the fixed joint 110, and the coupling point of the first steel wire rope 300 and the movable pulley 220 are in the same plane, thereby avoiding derailment problems and effectively improving the safety and stability during the lifting process.

[0090] See also Figure 2 and Figure 3In an optional embodiment of the present invention, the replacement device further includes a first auxiliary connecting frame 700 and a second auxiliary connecting frame 800, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 are fastened together, the first auxiliary connecting frame 700 is used to be fixed to the first variable pitch bearing 10, and the second auxiliary connecting frame 800 is used to be fixed to the second variable pitch bearing 20. Specifically, the first auxiliary connecting frame 700 can be fixed to the first variable pitch bearing 10 by using the connecting bolts between the first variable pitch bearing 10 and the blade; the second auxiliary connecting frame 800 can be fixed to the second variable pitch bearing 20 by using the blade mounting holes on the second variable pitch bearing 20 and stud bolts.

[0091] When in use, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 can be firstly set on the first variable pitch bearing 10 and the second variable pitch bearing 20. In this way, 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, thereby preventing the second variable pitch bearing 20 from accidentally falling, thereby effectively improving the safety during the lifting process.

[0092] Fig.13 It is a schematic diagram of the assembly of the static auxiliary lifting assembly provided in an embodiment of the present invention.

[0093] See also Fig.13 In an optional embodiment of the present invention, the replacement equipment also includes a static auxiliary lifting assembly 900, which includes a sling 910, a second fixed pulley 920, a second steel wire rope 930 and a second driving component 940. The first end of the sling 910 is used to be fixed to the first variable pitch bearing 10 so as to establish a lifting 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 inspection port of the second variable pitch bearing 20; the first end of the second steel wire rope 930 is connected to the second driving component 940, and the second end of the second steel wire rope 930 passes around the second fixed pulley 920 and then extends toward the ground. The second driving component 940 is used to drive the second end of the second steel wire rope 930 to move in a vertical direction.

[0094] Specifically, with the help of bolts used to connect the first variable pitch bearing 10 to the blades, a lifting anchor point can be set on each of the two first variable pitch bearings 10. Correspondingly, two slings 910 can be set. The two slings 910 can be fixed to the two lifting anchor points on both sides of the hub 30 through shackles, and intersect directly above the inspection port of the second variable pitch bearing 20. The second fixed pulley 920 is fixed to the intersection of the two slings 910 through a hook. The second steel wire rope 930 is wound around the second fixed pulley 920, and the first end of the second steel wire rope 930 is connected to the second driving component 940. A hook is set on the second end of the second steel wire rope 930.

[0095] The second drive component 940 is similar to the aforementioned drive assembly 400, and existing equipment such as a hoist 430 or a winch component can be selected. The specific position of the second drive component 940 is also the same as the aforementioned drive assembly 400, and can be set on the first variable pitch bearing 10, the second variable pitch bearing 20 or the ground. When it is set on the ground, the second drive component 940 can be integrated with the aforementioned rope collecting component 440. Specifically, it can be adaptively selected according to actual conditions.

[0096] It is understandable that since the drive assembly 400 and the first steel wire rope 300 and other components need to meet the load-bearing capacity of the second variable pitch bearing 20, their structures require a certain strength, which results in these components being heavy and difficult to carry manually. In the embodiment of the present invention, a static-assisted lifting assembly 900 is provided, which can be used for the preparatory installation of the other aforementioned components. For example, the hoist 430 can be lifted into the interior of the hub 30 through the static-assisted lifting assembly 900. In this way, the difficulty of installing the replacement equipment can be effectively reduced and the overall construction period can be shortened.

[0097] It should be noted that when components such as the first fixed component 100, the movable component 200, the driving component 400, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800 are arranged on the first pitch bearing 10 or the second pitch bearing 20, they can be connected and fixed with the help of bolts connecting the first pitch bearing 10 and the second pitch bearing 20 to the blades. Therefore, the interface dimensions of each component can be adjusted according to the different distribution sizes of bolts connecting the first pitch bearing 10 and the second pitch bearing 20 to the blades in different models to achieve adaptation to different models.

[0098] An optional pitch bearing replacement method corresponding to the replacement device provided by the present invention is shown below.

[0099] Step 1: Use a turning gear to rotate the impeller to rotate the second variable pitch bearing 20 to just above the hub 30; Step 2: 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; Step 3: Remove the fastening nut of the outer ring of the second pitch bearing 20; Step 4: Use the turning gear to rotate the impeller again to rotate the second variable pitch bearing 20 to the bottom; Step 5: Use the static auxiliary lifting assembly 900 to lift the hoist 430 and the first steel wire rope 300 through the inspection port of the second variable pitch bearing 20 to the inside of the hub 30, and install them on the mounting seat; Step 6: Pass the first steel wire rope 300 around the first fixed pulley 120 and the movable pulley 220, and fix them on the fixed joint 110; Step 7: Remove the connecting bolts between the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800; Step 8: Operate the two hoists 430 and the hand chain hoist in the angle adjustment assembly 600, and the three cooperate with each other to make the second variable pitch bearing 20 keep the angle a and withdraw the bolt rod on the hub 30; Step nine: After the second variable pitch bearing 20 is withdrawn from the bolt rod, the hand chain block is lowered to make the second variable pitch bearing 20 horizontal, and then the connection between the hand chain block and the second variable pitch bearing 20 is released; Step 10: Operate the two hoists 430 to continue lowering the second variable pitch bearing 20 until it reaches the ground; The installation of the new second variable pitch bearing 20 can be carried out in reverse order of the above steps; it should be noted that in step one, a turning wheel is used to rotate the second variable pitch bearing 20 to the top, in order to facilitate the operators to install the movable pulley 220, the first fixed pulley 120, the fixed joint 110, the mounting seat in the drive assembly 400, the first auxiliary connecting frame 700 and the second auxiliary connecting frame 800, and at the same time facilitate the removal of the fastening nut on 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.

[0100] It should also be noted that after the fastening nuts on the outer ring of the second variable pitch bearing 20 in step three are removed, 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 detaching from the hub 30 when the second variable pitch bearing 20 rotates to the bottom again in step four.

[0101] It should also be noted that in step five, about 2 m of the first steel wire rope 300 at the upper rope outlet end of the hoist 430 needs to be reserved for the winding and fixing of the first steel wire rope 300 in step six. The rope end at this point should not be reserved too long to avoid causing a burden on the lifting of the hoist 430.

[0102] It should also be noted that the two hoists 430 in step eight can be controlled individually or synchronously. The purpose is to control the angle and position of the second variable pitch bearing 20 through three points in the initial stage of disassembly and the final stage of installation of the second variable pitch bearing 20 to facilitate the installation of the second variable pitch bearing 20 in the holes.

[0103] It should be noted that the technical solutions in various embodiments of the present invention can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present invention.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for replacing a wind turbine pitch bearing, characterized in that: include: A first fixing assembly (100) comprising a fixing joint (110), wherein the fixing joint (110) is used to be fixed to a first pitch bearing (10); A movable pulley (220), located on one side of the fixed joint (110), the movable pulley (220) being used to be fixed to the second pitch bearing (20); A first steel wire rope (300), a first end of which is fixed to the fixed joint (110) and a second end of which is wound around the movable pulley (220); A drive assembly (400) is coupled to the second end of the first steel wire rope (300), the drive assembly (400) being suitable for being fixed to the first variable pitch bearing (10), the second variable pitch bearing (20) or the ground, and the drive assembly (400) being used to control the movement of the first steel wire rope (300); when the drive assembly (400) is arranged on the second variable pitch bearing (20) or the ground, the first fixing assembly (100) further comprises a first fixed pulley (120) for being fixed to the first variable pitch bearing (10), the movable pulley (220) being located between the fixing joint (110) and the first fixed pulley (120), and the second end of the first steel wire rope (300) being arranged around the movable pulley (220) and the first fixed pulley (120) in sequence.

2. The replacement device for wind turbine pitch bearing according to claim 1, characterized in that: The driving assembly (400) comprises: a hoist (430), the second end of the first steel wire rope (300) being passed through the hoist (430), the hoist (430) being suitable for being fixed to the first variable pitch bearing (10), the second variable pitch bearing (20) or the ground, and the hoist (430) being used to control the movement of the first steel wire rope (300); The rope collecting component (440) is arranged on the 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 rope collecting component (440) is used to collect and release the first steel wire rope (300).

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

4. The replacement device for wind turbine pitch bearing according to claim 3 is characterized in that: The rope collecting drum (444) comprises a drum body (4441) and a transmission plate (4442); the drum body (4441) is sleeved on the outside of the transmission plate (4442), or the transmission plate (4442) is arranged at the end of the drum body (4441); the second end of the first steel wire rope (300) is fixed to the drum 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 plate (446) and a locking member (447); the friction plate (446), the spring (445) and the locking member (447) are sequentially sleeved on the transmission shaft (442); a side of the friction plate (446) away from the spring (445) is in contact with the transmission plate (4442); the locking member (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).

5. The replacement device for wind turbine pitch bearing according to claim 1, characterized in that: In the case where the driving assembly (400) is arranged on the ground, the replacement device further comprises: a guide rope bracket (510), the guide rope bracket (510) being arranged on a path along which the second end of the first steel wire rope (300) passes, and being used for being arranged at an inspection opening of the second variable pitch bearing (20); The guide rope roller (520) is rotatably disposed on the guide rope bracket (510) and is coupled to the second end of the first steel wire rope (300).

6. The replacement device for wind turbine pitch bearing according to claim 1, characterized in that: 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 to control the movement of the first steel wire rope (300).

7. The replacement device for a wind turbine 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 frame (130), wherein the fixed pulley mounting frame (130) is suitable for being fixed to the first variable pitch bearing (10); When the first fixing assembly (100) includes the first fixed pulley (120), the fixing joint (110) is rotatably arranged on one side of the fixed pulley mounting frame (130), and the first fixed pulley (120) is rotatably arranged on the other side of the fixed pulley mounting frame (130).

8. The replacement device for a wind turbine pitch bearing according to any one of claims 1 to 6, characterized in that: Also includes: An adjustment bracket (610) adapted to be mounted on a front hole of the wheel hub (30); A lifting component (620) is provided on the adjustment bracket (610) and is used to adjust the angle of the second variable pitch bearing (20) relative to a horizontal plane.

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

10. The replacement device for a wind turbine pitch bearing according to any one of claims 1 to 6, characterized in that: Also includes: A sling (910), a first end of which is used to be fixed to the first pitch bearing (10); A second fixed pulley (920) is arranged at a second end of the sling (910), and the second fixed pulley (920) is used to be arranged directly above an inspection opening of the second variable pitch bearing (20); A second steel wire rope (930) is wound around the second fixed pulley (920); The second driving component (940) is connected to the first end of the second steel wire rope (930), and the second driving component (940) is used to drive the second end of the second steel wire rope (930) to move along the vertical direction.

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