Blade hoisting tool

Abstract

This disclosure provides a blade lifting fixture, which includes a pitch rotation mechanism and a blade clamp. The pitch rotation mechanism includes a support frame, a pitch rotation shaft, and a rotation shaft drive assembly. The pitch rotation shaft is rotatably mounted on the support frame, and its first end is connected to the blade clamp. The second end of the pitch rotation shaft is connected to the rotation shaft drive assembly. The rotation shaft drive assembly includes a worm gear and a worm for driving the worm gear to rotate. The worm gear is coaxially mounted with the pitch rotation shaft and fixed to the second end of the pitch rotation shaft, so that the worm gear drives the worm gear to rotate, thereby driving the blade clamp to rotate, thereby adjusting the pitch angle of the blade. Therefore, the blade lifting fixture can clamp the blade and rotate together, eliminating the need for an additional turning mechanism during blade installation.

Description

Technical Field

[0001] This disclosure pertains to the field of wind power generation technology, and particularly relates to a blade hoisting fixture. Background Technology

[0002] As the single-unit capacity of wind turbine generators continues to increase, the size of wind turbine blades is also gradually increasing. For example, the blade length of offshore wind turbine generators has exceeded 90 meters and the weight has exceeded 35 tons. Due to the weight of the blades, it is becoming increasingly difficult to connect the blades to the hub in the air.

[0003] Traditional blade installation requires a turning gear structure to rotate the hub so that the hub's pitch bearings correspond to the blade flange positions. As the blades increase in size, the load that the traditional turning gear structure needs to bear also increases, which causes the generator end cover structure (the connection point with the turning gear) to deform during the turning process, affecting the normal operation of the unit.

[0004] Due to the excessive length of the blades, the three-blade installation method carries a significant risk of overturning due to the limitations of the installation vessel. For example, during the installation of the aforementioned blades, the blade lifting fixture used can rotate the blade at a small angle, such as 30°. Therefore, a crane is needed to rotate the blade lifting fixture at a large angle. However, this method poses significant safety hazards. For instance, during the crane's rotation with the blade lifting fixture, the acceleration of the hook during lowering may cause the hook to collide with the blade, or the additional pulling force generated by the crane's misoperation may cause the blade lifting fixture to exert additional pulling force on the blade, causing the blade to slip out of the clamping port.

[0005] When the first blade needs to be installed and the second blade needs to be clamped after the blade hoisting fixture has been installed, it is usually necessary to interchange the positions of the blade clamping block and the blade tip clamping block at the clamping port. This installation process is cumbersome, time-consuming and labor-intensive. Summary of the Invention

[0006] The main inventive objective of this disclosure is to provide a blade lifting fixture that can clamp the blade and rotate it together, and can achieve large-angle rotation in the pitch direction, thus eliminating the need for an additional turning mechanism during blade installation.

[0007] To achieve the aforementioned objectives, this disclosure provides the following technical solution:

[0008] According to one aspect of this disclosure, a blade lifting fixture is provided, the blade lifting fixture including a pitch rotation mechanism and a blade clamp. The pitch rotation mechanism includes a support frame, a pitch rotation shaft, and a rotation shaft drive assembly. The pitch rotation shaft is rotatably mounted on the support frame, and a first end of the pitch rotation shaft is connected to the blade clamp. A second end of the pitch rotation shaft is connected to the rotation shaft drive assembly. The rotation shaft drive assembly includes a worm gear and a worm for driving the worm gear to rotate. The worm gear is coaxially mounted with the pitch rotation shaft and fixed to the second end of the pitch rotation shaft, so that the worm gear drives the worm gear to rotate, thereby driving the blade clamp to rotate, thereby adjusting the pitch angle of the blade.

[0009] Preferably, there are two worm gears, symmetrically arranged on both sides of the worm wheel.

[0010] According to another exemplary embodiment of this disclosure, the blade lifting fixture further includes a hanger, and a pitch rotation shaft is provided on the support frame. The pitch rotation shaft is rotatably mounted to the lower end of the hanger, and the rotation axis of the pitch rotation shaft is arranged perpendicular to the rotation axis of the pitch rotation shaft and parallel to the length direction of the blade clamp.

[0011] Furthermore, the blade hoisting fixture also includes a pitch drive mechanism, the first end of which is hinged to the hoisting frame, and the second end of which is hinged to the support frame.

[0012] Preferably, the hanger includes two downwardly extending vertical beams, the two vertical beams being spaced apart, the support frame being disposed between the two vertical beams, and the pitch rotation shaft extending from both sides of the support frame and rotatably connected to the two vertical beams.

[0013] According to another exemplary embodiment of this disclosure, the pitch rotation shaft is composed of two rotation shaft segments, coaxially disposed on both sides of the support frame.

[0014] Preferably, the pitch drive mechanism is a telescopic hydraulic cylinder, and there are two pitch drive mechanisms. The support frame includes a support base and two support plates. The two support plates are disposed on the side surface of the support base and located on both sides of the rotary shaft drive assembly. The piston rod of the telescopic hydraulic cylinder is connected to the support plate, and the cylinder body of the telescopic hydraulic cylinder is connected to the hanger.

[0015] Furthermore, the pitch drive mechanism includes a cylinder and a piston rod, the first end of the support plate is provided with a pitch drive pivot shaft, the free end of the piston rod is pivotally connected to the pitch drive pivot shaft, and the free end of the cylinder is pivotally connected to the blade clamp.

[0016] In another exemplary embodiment of this disclosure, the blade clamp includes a main beam, a spline is provided at the second end of the pitch rotation shaft, and a spline groove matching the spline is provided in the middle of the main beam.

[0017] Furthermore, the blade clamp also includes blade clamping units disposed at both ends of the main beam. The pitch rotation mechanism is connected to the main beam and can drive the main beam to rotate around the pitch rotation axis. The blade clamping unit includes an upper clamping assembly, a lower clamping assembly, and a clamping adjustment unit. The clamping adjustment unit includes a first telescopic drive mechanism, which is a first telescopic hydraulic cylinder. The two ends of the clamping adjustment unit are respectively connected between the upper clamping assembly and the lower clamping assembly, and are used to adjust the size of the clamping opening formed by the upper clamping assembly and the lower clamping assembly.

[0018] More preferably, the upper clamping assembly includes a clamping arm, an upper vertical arm, and an angle adjustment unit. The upper vertical arm extends downward from one end of the clamping arm, and a pivot shaft is provided on the upper part of the upper vertical arm. The clamping arm is connected to the upper vertical arm through the pivot shaft. The angle adjustment unit includes a second telescopic drive mechanism, which is a second telescopic cylinder. The first end of the second telescopic cylinder is hinged to the end of the clamping arm and is capable of telescopic extension and retraction. The second end of the second telescopic cylinder is hinged to the lower part of the upper vertical arm, thereby driving the clamping arm to pivot around the pivot shaft. And / or the lower clamping assembly includes a support arm and a lower vertical arm extending upward from one end of the support arm. The lower vertical arm is connected to the upper vertical arm, so that the upper clamping assembly and the lower clamping assembly form a space for clamping the blade.

[0019] In another exemplary embodiment of this disclosure, the blade lifting fixture further includes a first locking assembly for locking the upper arm relative to the lower arm. The first locking assembly includes: a first locking member mounted on one of the lower arm and the upper arm; a second locking member mounted on the other of the lower arm and the upper arm, and opposite to the first locking member, having a locked position and an unlocked position. In the locked position, the second locking member engages with the first locking member to lock the relative position of the upper clamping assembly and the lower clamping assembly. In the unlocked position, the second locking member disengages from the first locking member, thereby allowing the upper arm to move relative to the lower arm; and a first driving member connected to the second locking member for driving the second locking member to move to at least one of the locked position and the unlocked position.

[0020] Further, the first locking member is a long rack, mounted on the lower upright arm and extending along the direction in which the upper upright arm moves relative to the lower upright arm; the second locking member is a short rack, mounted on the upper upright arm and opposite to the long rack, and capable of moving in a direction perpendicular to the direction in which the upper upright arm moves relative to the lower upright arm under the drive of the first driving member, so that in the locked position, the short rack and the long rack mesh with each other, wherein the first driving member is a telescopic cylinder, and the short rack is disposed at the first end of the telescopic cylinder.

[0021] Preferably, the blade lifting fixture further includes a second locking assembly for locking the clamping arm relative to the upper vertical arm. The second locking assembly includes a stop for restricting the retraction of the first end of the second telescopic cylinder. The stop is a locking wedge, which has a locked position and an unlocked position. The locking wedge has an inclined surface. In the locked position, the inclined surface of the locking wedge abuts against the lower part of the first end of the second telescopic cylinder along the direction of retraction of the first end, thereby restricting the retraction of the first end of the second telescopic cylinder. In the unlocked position, the locking wedge disengages from the first end of the second telescopic cylinder. The assembly also includes a second drive member mounted on the clamping arm for driving the locking wedge to at least one of the locked and unlocked positions; the second locking assembly also includes a support frame mounted on the upper part of the upper arm, the locking wedge being mounted on the support frame and movable in a direction toward or away from the first end of the second telescopic cylinder, the support frame having a groove formed thereon extending along the telescopic stroke of the first end of the second telescopic cylinder to guide the movement trajectory of the first end of the second telescopic cylinder, and the bottom of the groove supporting the first end after the first end of the second telescopic cylinder retracts.

[0022] In another exemplary embodiment of this disclosure, the second locking assembly includes a stop for restricting the retraction of the first end of the second telescopic cylinder. The stop includes: a baffle mounted on the upper arm and arranged on the telescopic path of the first end of the second telescopic cylinder; and an eccentric wheel mounted on the clamping arm and rotatable relative to the clamping arm to a locked position and an unlocked position. In the locked position, the eccentric wheel abuts against the baffle, thereby restricting the telescopic movement of the first end of the second telescopic cylinder. In the unlocked position, the eccentric wheel disengages from the baffle, thereby allowing the first end of the second telescopic cylinder to telescopically extend and retract. The eccentric wheel includes a long-diameter end and a short-diameter end. In the locked position, the long-diameter end rotates to the baffle and abuts against the baffle. In the unlocked position, the short-diameter end rotates to the baffle and separates from the baffle. The second locking assembly further includes a third driving member mounted on the clamping arm for driving the eccentric wheel to at least one of the locked position and the unlocked position.

[0023] The blade lifting fixture provided in this disclosure has the following beneficial effects: The pitch and rotation mechanism of the blade lifting fixture includes a pitch and rotation shaft and a rotation shaft drive assembly. The two ends of the pitch and rotation shaft are respectively connected to the blade clamp and the rotation shaft drive assembly, so as to drive the worm wheel to rotate through the worm gear, thereby driving the blade clamp to rotate, thereby adjusting the pitch angle of the blade. Attached Figure Description

[0024] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A structural diagram of a blade lifting fixture provided for an exemplary embodiment of this disclosure.

[0026] Figure 2 for Figure 1 An exploded view of the blade lifting fixture.

[0027] Figure 3 for Figure 1 The working principle diagram of the worm gear assembly.

[0028] Figure 4 A structural diagram of a blade lifting fixture provided for another exemplary embodiment of this disclosure.

[0029] Figure 5 for Figure 4 A partial exploded view of the blade lifting fixture.

[0030] Figure 6 A structural diagram of a blade lifting fixture provided for an exemplary embodiment of this disclosure.

[0031] Figure 7 for Figure 6 Diagram showing the usage status of the blade lifting tool.

[0032] Figure 8 It shows Figure 1 Exploded view of the blade clamping unit.

[0033] Figure 9 It shows Figure 8 A three-dimensional view of the internal structure of the blade clamping unit.

[0034] Figure 10 Showing Figure 8 An exploded view of the blade clamping unit.

[0035] Figure 11 It shows Figure 8 An enlarged view of the first locking component.

[0036] Figure 12 , Figure 13 and Figure 14 A schematic diagram of the process by which the second locking assembly locks the clamping arm relative to the upper upright arm is shown.

[0037] Figure 15 This is a structural diagram of a blade clamping unit according to another embodiment.

[0038] Figure 16 A schematic diagram of a blade clamp according to an exemplary embodiment of the present disclosure is shown.

[0039] Figure 17 It shows Figure 16 The diagram shows the state of the blade clamp before the blade pitches.

[0040] Figure 18 It shows Figure 16 The blade clamp is used to illustrate the state of the blade after pitching. Detailed Implementation

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of this disclosure are limited to those set forth herein, and features in the various embodiments of this disclosure can be combined arbitrarily. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0042] An exemplary embodiment of this disclosure provides a blade lifting fixture, which includes a hanger 200, a blade clamp 100, a support frame 610, and a pitch rotation mechanism 600. The pitch rotation mechanism 600 is connected to the lower end of the hanger 200, and the blade clamp 100 is connected to the pitch rotation mechanism 600 so as to perform pitch rotation relative to the hanger 200 under the drive of the pitch rotation mechanism 600, thereby performing pitch operation.

[0043] The pitch rotation mechanism 600 includes a support frame 610, a pitch rotation shaft 620, and a pitch drive mechanism. The pitch rotation shaft 620 is rotatably mounted on the support frame 610, and its first end is connected to the blade clamp 100. The second end of the pitch rotation shaft 620 is connected to the pitch drive mechanism to receive the rotational driving force provided by the pitch drive mechanism, thereby driving the pitch rotation shaft 620 to rotate, and ultimately driving the blade clamp 100 to rotate.

[0044] The pitch drive mechanism can be a worm gear assembly 630, which may include a worm gear 6301 and a worm 6302 that drives the worm gear 6301 to rotate. The worm gear 6301 is coaxially arranged with the pitch rotation shaft 620 and fixed on the outer circumference of the second end of the pitch rotation shaft 620, so that the worm gear 6301 is driven to rotate by the worm 6302, thereby driving the blade clamp 100 to rotate, thereby adjusting the pitch angle of the blade.

[0045] The pitch rotation shaft 620 is rotatably supported on the support frame 610, and the two ends of the pitch rotation shaft 620 are respectively connected to the worm gear assembly 630 and the blade clamp 100, so as to drive the worm gear 6301 to rotate through the worm 6302, thereby driving the blade clamp 100 to rotate, thereby adjusting the pitch angle of the blade.

[0046] Figure 1 A structural diagram of a blade lifting fixture provided for an exemplary embodiment of this disclosure. Figure 2 for Figure 1 An exploded view of the blade lifting fixture.

[0047] Reference Figure 1 and Figure 2 In this embodiment, the support base 613 can be a structural form of the support frame 610. The support base 613 can be a hexahedral structure, and the support base 613 is provided with a first through hole extending in the front-rear direction for the pitch rotation axis 620 to pass through. For example, but not limited to, the first through hole can penetrate the support base 613 in the front-rear direction. In this embodiment, the front-rear direction of the support base 613 can be parallel to the extension direction of the pitch rotation axis 620. In other words, the front-rear direction of the support base 613 is perpendicular to the main beam 120 of the blade clamp. In addition, the support base 613 may also have a second through hole for the worm gear 6302 to pass through. The second through hole can be perpendicular to the first through hole but does not intersect it.

[0048] The pitch rotation shaft 620 may include a spline shaft section, a worm gear shaft section, and a smooth shaft section disposed between the spline shaft section and the worm gear shaft section. Specifically, the spline shaft section may be located at the first end of the pitch rotation shaft 620 and may be inserted into the blade clamp 100 to drive the blade clamp 100 to rotate together. The worm gear shaft section may be located at the second end of the pitch rotation shaft 620, and a worm gear assembly 630 may be disposed on the outer periphery of the worm gear shaft section. For example, but not limited to, the worm gear 6301 may be sleeved on the outer periphery of the pitch rotation shaft 620 and coaxially disposed with the pitch rotation shaft 620. The smooth shaft section may be located in the middle of the pitch rotation shaft 620 and may be rotatably connected to the support frame 610 via bearings. The linear motion of the worm 6302 may drive the worm gear 6301 to rotate around the pitch rotation shaft 620, thereby driving the pitch rotation shaft 620 to rotate, which in turn drives the blade clamp 100 to rotate together. For example, but not limited to, driven by the pitch rotation shaft 620, the pitch rotation range of the blade clamp 100 can be between +40° and -220°.

[0049] In this embodiment, to improve the strength of the output load of the worm gear assembly 630, the number of worms 6302 can be increased. For example, but not limited to, two worms 6302 can be symmetrically arranged on the outer periphery of the worm gear 6301. For details, please refer to... Figure 3 .

[0050] Figure 4 A structural diagram of a blade lifting fixture provided for another exemplary embodiment of this disclosure. Figure 5 for Figure 4 A partial exploded view of the blade lifting fixture.

[0051] exist Figure 4 and Figure 5 In the example shown, the blade clamp 100 is capable of pitch rotation relative to the hanger 200 about the pitch rotation axis 650 to perform pitch operation. Figure 4 and Figure 5 As shown, the pitch rotating shaft 650 is fixedly mounted on the support frame 610 and extends in the horizontal direction. A shaft hole 231 is provided at the lower end of the hanger 200, and the pitch rotating shaft 650 is installed in the shaft hole 231 at the lower end of the hanger 200 through a bearing.

[0052] According to the embodiments of this disclosure, the blade hoisting fixture also includes a pitch drive mechanism 640. The two ends of the pitch drive mechanism 640 are respectively connected to the hanger 200 and the support frame 610 to drive the support frame 610 to rotate relative to the hanger 200 around the pitch rotation axis 650. Since the blade clamp 100 is connected to the support frame 610 through the pitch rotation axis 620, the support frame 610 carries the blade clamp 100 to rotate together around the pitch rotation axis 650, thereby performing the pitch operation.

[0053] Reference Figure 4 and Figure 5 The support frame 610 includes a support base 613 and a support plate 611 extending from the support base 613. The support plate 611 can be used to support one end of the pitch drive mechanism 640. Two pitch drive mechanisms 640 can be configured, therefore, a pair of support plates 611 can be configured. The pair of support plates 611 can be disposed on both sides of the support base 613 and located on both sides of the worm gear assembly 630, and can be arranged perpendicular to the length direction of the main beam 120 of the blade clamp 100. The support plates 611 and the blade clamp 100 are respectively located on both sides of the pitch rotation axis 650. One end of the pitch drive mechanism 640 is disposed on the support plate 611, and the other end of the pitch drive mechanism 640 is connected to the hanger 200 to drive the blade clamp 100 to rotate around the pitch rotation axis 650, which can drive the blade 1 to pitch within a large range, for example, but not limited to, the pitch angle can be any value between -20° and +120°. Preferably, the pitch angle can be any value between -7° and 90°.

[0054] The pitch rotation shaft 650 can be disposed on both sides of the support frame 610 and extends in a direction parallel to the main beam 120 of the blade clamp 100. The rotation axis of the pitch rotation shaft 650 is arranged perpendicular to the rotation axis of the pitch rotation shaft 620.

[0055] The support frame 200 may include two downwardly extending vertical beams 230, spaced apart from each other, with a support frame 610 positioned between them. Each vertical beam 230 has a shaft hole 231 at its lower end, through which the pitch rotation shaft 650 passes via a bearing. The pitch rotation shaft 650 may be integrally formed as a single shaft, passing through the support frame 610 and having both ends inserted into the shaft holes 231. To avoid interference with the pitch rotation shaft 620, the two need to be offset from each other in the height direction of the support frame 610. In this case, the support frame 610 will be relatively large. Preferably, the pitch rotation shaft 650 may include two rotating shaft segments, each connected to the side surface of the support frame 610 and coaxially arranged. Since the pitch rotation shaft 650 does not have a segment passing through the support frame 610, it will not interfere even if it is positioned in the same plane as the pitch rotation shaft 620; therefore, the support frame 610 can be relatively compact.

[0056] Specifically, the two rotating shaft segments can be arranged on both sides of the support base 613 in the width direction. For example, but not limited to, one end of the rotating shaft segment is fixed to the side of the support base 613 in the width direction, and the pitch rotating shaft 650 extends along the width direction of the support base 613. The two rotating shaft segments can be arranged coaxially.

[0057] The pitch drive mechanism 640 can be a telescopic cylinder, with one end connected to the support plate 611 and the other end connected to the vertical beam 230. In the example shown in the attached drawings, the telescopic cylinder includes a cylinder body 641 and a piston rod 642. The piston rod 642 is pivotally connected to the support plate 611, and the cylinder body 641 is pivotally connected to the vertical beam 230. For example, a pitch drive pivot shaft 612 is provided on the lower part of the support plate 611 on the side opposite to the pitch rotation axis 650. The free end of the piston rod 642 is pivotally connected to the pitch drive pivot shaft 612, and the free end of the cylinder body 641 is pivotally connected to the blade clamp 100.

[0058] Specifically, a pivot hole is provided on the lower part of the support plate 611 on the side opposite to the pitch rotation shaft 650. The pitch drive pivot shaft 612 can pass through the pivot hole, and the free end of the piston rod 642 can pivot on the pitch drive pivot shaft 612. The free end of the cylinder 641 can pivot on the upper part of the vertical beam 230 so that the extension and retraction of the piston rod 642 relative to the cylinder 641 can drive the blade clamp 100 and the pitch rotation mechanism 600 to rotate around the pitch rotation shaft 650.

[0059] Figure 6 A structural diagram of a blade lifting fixture provided for an exemplary embodiment of this disclosure. Figure 7 for Figure 6 Diagram showing the usage status of the blade lifting tool.

[0060] and Figure 4 Compared to the blade lifting fixture in the previous embodiment, in this embodiment, the support frame 610 further includes a box structure located at one end away from the blade clamp 100. This box structure has a receiving chamber that houses at least one of the following: an electrical control cabinet 681, a generator 682, a counterweight, a battery, and a frequency converter cabinet. By arranging the electrical control cabinet 681, counterweight, and other components within the receiving chamber, counterweight can be provided for the entire blade lifting fixture, thereby simplifying the structure and reducing its volume. In this embodiment, the blade lifting fixture also includes a counterweight adjustment mechanism 684 located below the front of the housing structure to adjust the position of the counterweight. Furthermore, a bottom support can be provided at the bottom of the box structure. When used at sea, this bottom support can increase the distance between the ground of the box structure and the operating platform, thereby preventing seawater from entering the box structure and avoiding damage to the electrical control cabinet 681 upon contact with water.

[0061] Continue to refer to Figures 1 to 5 The blade clamp 100 includes a main beam 120, with a spline groove in the middle of the main beam 120, which can match the spline shaft section of the pitch rotation shaft 620. A vertical beam 230 (e.g., ...) can be fixedly installed behind the main beam 120. Figure 5As shown), the lower end of the vertical beam 230 is provided with a shaft hole 231 for accommodating the pitch rotating shaft 650. The upper end of the vertical beam 230 may be provided with a drive mechanism connection part. The drive mechanism connection part may be configured as a through hole for the pin shaft to pass through. The free end of the cylinder 641 can be connected to the vertical beam 230 through the pin shaft, but it is not limited thereto.

[0062] Reference Figures 1 to 7 The blade clamp 100 includes a main beam 120 and blade clamping units 110 and 130 disposed at both ends of the main beam 120. The pitch rotation mechanism is connected to the main beam 120 and can drive the main beam 120 to rotate around the pitch rotation axis 620.

[0063] As shown in the figure, blade clamping unit 110 and blade clamping unit 130 are used to clamp the tip and root portions of the blade, respectively; therefore, they can also be referred to as the tip clamping mechanism and the root clamping structure, respectively. The structures of blade clamping unit 110 and blade clamping unit 130 are largely the same, differing only in the adjustment range of the clamping opening size. Therefore, in the following description, only the structure of blade clamping unit 110 will be described.

[0064] Reference Figure 8 The blade clamping units 110 and 130 include an upper clamping assembly 140, a lower clamping assembly 150, and a clamping adjustment unit 115. The clamping adjustment unit 115 is connected between the upper clamping assembly 140 and the lower clamping assembly 150 and is used to adjust the size of the clamping opening formed by the upper clamping assembly 140 and the lower clamping assembly 150. The clamping adjustment unit 115 can adjust the size of the clamping opening formed by the upper clamping assembly 140 and the lower clamping assembly 150, so as to be suitable for clamping blades of different sizes.

[0065] Specifically, the blade clamping unit 110 may also include a first locking component 116, which is used to lock the clamping adjustment unit 115 after the clamping opening size is adjusted to a suitable size by the clamping adjustment unit 115, thereby preventing the upper clamping component 140 and the lower clamping component 150 from moving relative to each other.

[0066] Continue to refer to Figure 8 The upper clamping assembly 140 includes a clamping arm 111 and an upper upright arm 112 extending downward from one end of the clamping arm 111, the clamping arm 111 being pivotable relative to the upper upright arm 112. Specifically, see reference... Figure 6The pivot end of the clamping arm 111 is pivoted on the upper vertical arm 112. When a blade needs to be loaded, the free end of the clamping arm 111 is raised. After the blade is loaded into place, the free end of the clamping arm 111 rotates downward to clamp the blade. The blade clamping unit 110 according to an embodiment of this disclosure may further include an angle adjustment unit 117 and a second locking assembly 118. The angle adjustment unit 117 is used to adjust the pivot angle of the clamping arm 111, and the second locking assembly 118 is used to lock the clamping arm 111.

[0067] The lower clamping assembly 150 includes a support arm 113 and a lower upright arm 114 extending upward from one end of the support arm 113. The lower upright arm 114 is connected to the upper upright arm 112, thereby forming a space (i.e., a clamping opening) for clamping the blade 1 through the upper clamping assembly 140 and the lower clamping assembly. A clamping opening adjustment unit 115 is connected between the upper upright arm 112 and the lower upright arm 114, and is used to drive the upper clamping assembly to move relative to the lower clamping assembly to adjust the distance between the clamping arm 111 and the support arm 113, thereby adjusting the clamping opening size. A first locking assembly 116 is used to lock the upper upright arm 112 relative to the lower upright arm 114. A second locking assembly 118 is used to lock the clamping arm 111 relative to the upper upright arm 112.

[0068] According to an exemplary embodiment of this disclosure, the blade clamp 100 forms a clamping space (i.e., a clamping opening) with a "C" or "U" shape through an upper clamping assembly and a lower clamping assembly. A clamping arm 111 and a supporting arm 113 form two clamping jaws for clamping the opposing surfaces of the blade. An upper vertical arm 112 and a lower vertical arm 114 form a telescopic vertical arm connected between the clamping arm 111 and the supporting arm 113. Furthermore, the clamping opening adjustment unit 115 drives the upper vertical arm 112 and the lower vertical arm to move relative to each other, thereby adjusting the blade clamping range over a wider range. The angle adjustment unit 117 drives the clamping arm 111 to rotate relative to the upper vertical arm 112 to further adjust the clamping force on the blade. Specifically, the clamping arm 111 can be rotated counterclockwise to open and increase the blade entry space, or it can be rotated clockwise to press down and apply a clamping force to the blade. In addition, the height positions of the upper arm 112 and the lower arm 114 can be locked by the first locking component 116, and the rotation angle of the clamping arm 111 relative to the upper arm 112 can be locked by the second locking component 118, thereby maintaining the clamping state between the blade clamp 100 and the blade, preventing the blade clamp from loosening after clamping the blade, and ensuring the reliability of clamping.

[0069] Reference Figures 8 to 10In this embodiment, the upper arm 112 and the lower arm 114 can be a columnar hollow structure, i.e., a hollow cylindrical shape, and are formed as nested structures, as shown in the figure, and can be formed as a rectangular hollow structure. Specifically, the lower part of the upper arm 112 is nested inside the upper part of the lower arm 114, and can be pushed along the height direction by the clamp adjustment unit 115. Figure 9 The upper arm 112 and the lower arm 114 slide relative to each other (in the Y direction shown), thereby adjusting the height / length of the telescopic arm 114 to improve the versatility of the blade lifting fixture. For example, when the portion of the upper arm 112 and the lower arm 114 nested together increases, i.e., the height / length of the telescopic arm decreases, the distance between the clamping arm 111 and the supporting arm 113 decreases, and thus the opening of the clamping opening decreases; conversely, when the portion of the upper arm 112 and the lower arm 114 nested together decreases, the overall height / length of the telescopic arm increases, the distance between the clamping arm 111 and the supporting arm 113 increases, and thus the opening of the clamping opening increases. Optionally, the upper arm 112 and the lower arm 114 may be formed of stainless steel plate to improve strength and prevent corrosion, but this disclosure is not limited thereto. This embodiment does not limit the connection method and specific shape of the upper arm 112 and the lower arm 114, as long as the upper arm 112 and the lower arm 114 can move up and down along the vertical direction (Y direction) to adjust the distance between the pressing arm 111 and the supporting arm 113.

[0070] The clamping adjustment unit 115 may include a spacing telescopic drive mechanism disposed inside the lower arm 114. The spacing telescopic drive mechanism may be a high-thrust, long-stroke drive mechanism to adjust the clamping range of the blade 1 over a wide range, i.e., to adjust the size of the clamping opening. The spacing telescopic drive mechanism may be a telescopic cylinder, such as an automatically controlled hydraulic cylinder. One end of the telescopic cylinder is connected to the lower arm 114, and the other end is connected to the upper arm 112. The telescopic stroke of the telescopic cylinder may be relatively large. Through the linear telescopic movement of the telescopic cylinder, the upper arm 112 is moved relative to the lower arm 114, thereby adjusting the distance between the pressing arm 111 and the supporting arm 113. However, this disclosure is not limited to this; the clamping adjustment unit 115 may also be other drive elements that achieve linear telescopic drive, capable of driving the upper arm 112 and the lower arm 114 to move relative to each other, thereby adjusting the distance between the pressing arm 111 and the supporting arm 113. For example, it may also be a cylinder, an electric lead screw, or a bolt with a nut, etc.

[0071] The opening and closing degree of the clamping jaw can be adjusted by the clamping jaw adjustment unit 115 in conjunction with the lifting and lowering of the upper arm 112 relative to the lower arm 114.

[0072] After the opening and closing degree of the clamping port is adjusted appropriately, in order to maintain the size of the clamping port and more securely clamp the blade 1, a backup first locking component 116 is provided on the basis of the lifting function, such as... Figures 8 to 11 As shown, the first locking component 116 includes a first locking member 1161, a second locking member 1162, and a first driving member 1163.

[0073] The first locking member 1161 is mounted on one of the lower upright arm 114 and the upper upright arm 112. The second locking member 1162 is mounted on the other of the lower upright arm 114 and the upper upright arm 112, and is horizontally opposite to the first locking member 1161, having a locked position and an unlocked position. In the locked position, the second locking member 1162 engages with the first locking member 1161 to lock the relative position of the upper clamping assembly 140 and the lower clamping assembly 150. In the unlocked position, the second locking member 1162 disengages from the first locking member 1161, at which point the upper upright arm 112 can move relative to the lower upright arm 114. The first driving member 1163 can be a telescopic driving member, such as a hydraulic cylinder, a pneumatic cylinder, or a lead screw. In the example shown in the attached figure, the first drive member 1163 is a hydraulic cylinder or a pneumatic cylinder. The cylinder body portion of the first drive member 1163 is mounted on the lower part of the upper arm 112. The piston rod of the first drive member 1163 is connected to the second locking member 1162 and is used to drive the second locking member 1162 to move to at least one of the locked position and the unlocked position.

[0074] In this embodiment, the first locking member 1161 is a long rack, which is mounted on the lower upright arm 114 and moves along the direction in which the upper upright arm 112 moves relative to the lower upright arm 114. Figure 11 The second locking member 1162 is a short rack, mounted opposite to the long rack, and is capable of moving in a direction perpendicular to the direction in which the upper arm 112 moves relative to the lower arm 114, driven by the first driving member 1163. Figure 11 The short rack moves in the X direction (as shown in the diagram), so that in the locked position, the short rack and the long rack mesh with each other. In this embodiment, stepless locking between the upper arm 112 and the lower arm 114 can be achieved by using the meshing of the long rack and the short rack. The length of the long rack can be matched with the extension stroke of the first drive member 1163, or with the relative movement distance between the upper clamping assembly 140 and the lower clamping assembly 150. The length of the short rack can be less than the length of the long rack, and the specific length is not limited, as long as it has the strength to lock the upper arm 112 and the lower arm 114 together.

[0075] The first driving component 1163 may be a telescopic cylinder mounted on the upper arm 112, with a short rack disposed at the first end of the telescopic cylinder (i.e., the extended end of the piston rod). However, this disclosure is not limited to this. The first driving component 1163 may also be other driving elements capable of driving the second locking member 1162 to move toward or away from the first locking member 1161.

[0076] Figure 11 The diagram shows a first locking member 1161 formed on the inner surface of the lower upright arm 114, a first driving member 1163 mounted on the upper upright arm 112, and a second locking member 1162 mounted on the telescopic end of the first driving member 1163. However, the positions of the first locking member 1161 and the second locking member 1162 can be interchanged as needed.

[0077] In this embodiment, the relative position between the upper arm 112 and the lower arm 114 is locked by the meshing of the long rack and the short rack. However, this disclosure is not limited to this. The first locking member 1161 and the second locking member 1162 can also adopt other known locking structures in the prior art, such as the locking hole and the locking pin. As long as the locking or releasing of the upper arm 112 and the lower arm 114 can be achieved by the cooperation of the first locking member 1161 and the second locking member 1162, it is acceptable.

[0078] The clamping opening size can be adjusted in a wide range in the vertical direction by moving the upper arm 112 relative to the lower arm 114 through the clamping adjustment unit 115.

[0079] To further adjust the tightness of the clamping blade 1, the clamping arm 111 can be driven to rotate relative to the upper arm 112 by the angle adjustment unit 117, so as to adjust the opening and closing state of the clamping port of the blade 1.

[0080] Reference Figures 8 to 10 The blade clamping unit 110 according to an embodiment of this disclosure may further include an angle adjustment unit 117 and a second locking assembly 118. The angle adjustment unit 117 is used to adjust the pivot angle of the clamping arm 111 relative to the upper upright arm 112, so as to adjust the tilt angle of the clamping arm 111 relative to the upper upright arm 112. The second locking assembly 118 is used to lock the clamping arm 111 relative to the upper upright arm 112, thereby improving the safety of the blade clamping unit 110.

[0081] Specifically, a pivot shaft 1121 is provided on the upper part of the upper arm 112, and the clamping arm 111 is connected to the upper arm 112 through the pivot shaft 1121. The angle adjustment unit 117 may include a second telescopic drive mechanism, which may be a second telescopic cylinder. The first end of the second telescopic cylinder is hinged to the end of the clamping arm 111, and the second end of the second telescopic cylinder is hinged to the lower part of the upper arm 112, thereby driving the clamping arm 111 to pivot relative to the upper arm 112 around the pivot shaft 1121, adjusting the tilt angle of the clamping arm 111 relative to the upper arm 112, so as to drive the clamping arm 111 to rotate relative to the upper arm 112 through the angle adjustment unit 117, so as to further adjust the clamping force of the clamping blade.

[0082] Specifically, a pivot shaft 1121 is provided on the upper part of the upper arm 112 (e.g., Figure 9and Figure 10 As shown), the clamping arm 111 is connected to the upper arm 112 via a pivot shaft 1121. The first end of the second telescopic cylinder can be hinged to the end of the clamping arm 111, and the second end of the second telescopic cylinder can be hinged to the lower part of the upper arm 112, thereby driving the clamping arm 111 to pivot relative to the upper arm 112 around the pivot shaft 1121.

[0083] Similar to the first telescopic cylinder, the second telescopic cylinder can be an automatically controlled hydraulic cylinder. The second telescopic cylinder can adopt the same structural design as the first telescopic cylinder, or it can adopt a different structural design; that is, one can adopt a high-thrust, long-stroke design, while the other can adopt a high-precision, short-stroke design, to meet different control requirements for precision and stroke. In addition to the hydraulic cylinder, the angle adjustment unit 117 can also be other driving elements capable of driving the clamping arm 111 to rotate relative to the upper arm 112 around the pivot axis 1121. For example, it can also be a cylinder, an electric lead screw, or a bolt with a nut, etc.

[0084] A mounting plate 1122 can be connected to the upper end of the upper arm 112. The mounting plate 1122 extends laterally relative to the upper end of the upper arm 112. A pivot shaft 1121 can be installed at the end of the mounting plate 1122, thus being spaced apart from the upper end of the angle adjustment unit 117. The position where the clamping arm 111 is connected to the pivot shaft 1121 is spaced apart from the end of the clamping arm 111. Thus, after the end of the clamping arm 111 is connected to the upper end of the angle adjustment unit 117, the clamping arm 111 can pivot around the pivot shaft 1121 under the drive of the angle adjustment unit 117, thereby adjusting the tilt angle of the clamping arm 111 and correspondingly adjusting the clamping force on the blade.

[0085] After the angle adjustment unit 117 drives the clamping arm 111 to rotate relative to the upper arm 112 to the expected angle, the rotational position of the clamping arm 111 and the upper arm 112 can be locked by the second locking component 118, thereby maintaining the clamping state between the blade clamp and the blade 1.

[0086] Specifically, the second locking assembly 118 may include a stop for restricting the retraction of the first end of the second telescopic cylinder, thereby preventing the clamping arm 111 from pivoting upward and opening while the blade 1 is clamped, thus preventing the blade 1 from falling off.

[0087] Reference Figure 9 and Figure 10In this embodiment, the stop may be a locking wedge 1181. The locking wedge 1181 has a locked position and an unlocked position. In the locked position, the locking wedge 1181 abuts against the first end of the second telescopic cylinder to restrict its retraction. In the unlocked position, the locking wedge 1181 disengages from the first end of the second telescopic cylinder, thereby releasing the first end of the second telescopic cylinder so that it can retract.

[0088] To enable the locking wedge 1181 to switch between its locked and unlocked positions, the second locking assembly 118 may further include a second drive member 1182 and a support frame 1183. The second drive member 1182 may be a telescopic cylinder to actuate the locking wedge 1181 between the locked and unlocked positions. The cylinder body of the second drive member 1182 is mounted on the support frame 1183, and the piston rod of the second drive member 1182 is connected to the locking wedge 1181 for driving the locking wedge 1181 to at least one of its locked and unlocked positions.

[0089] The second locking assembly 118 may further include a support frame 1183. The support frame 1183 is mounted on the upper part of the upper arm 112, and the locking wedge 1181 is mounted on the support frame 1183 and is movable in a direction toward or away from the first end of the second telescopic cylinder. A groove 1184 may be formed on the support frame 1183, extending along the telescopic stroke of the first end of the second telescopic cylinder to guide the movement trajectory of the first end of the second telescopic cylinder, and the bottom of the groove 1184 supports the first end after the first end of the second telescopic cylinder retracts.

[0090] Optionally, the locking wedge 1181 may have an inclined surface 1181a. In the locked position, the inclined surface of the locking wedge 1181 abuts against the lower part of the first end of the second telescopic cylinder in the direction of retraction of the first end of the second telescopic cylinder, thereby restricting the retraction of the first end of the second telescopic cylinder. Through the inclined surface design, when a reverse force presses on the locking wedge 1181, a friction angle self-locking state is formed due to the inclined surface support with an inclined angle. Thus, after the blade is clamped in place and the second drive member 1182 pushes the locking wedge 1181 to the locked position, the second drive member 1182 does not need to provide thrust to lock the telescopic state of the angle adjustment unit 117, maintaining the rotation angle between the clamping arm 111 and the upper vertical arm 112, so that the blade is safely clamped without risk.

[0091] Figures 12 to 14 The process is illustrated whereby the angle adjustment unit 117 drives the clamping arm 111 to rotate relative to the upper upright arm 112 and is locked by the locking wedge 1181. (As shown) Figure 12 As shown, the clamping arm 111 is in a state of outward rotation relative to the upper vertical arm 112, at which time the first end of the second telescopic cylinder is in a retracted state; as Figure 13As shown, the first end of the second telescopic cylinder extends out and moves upward along the groove 1184 of the support frame 1183, thereby causing the clamping arm 111 to rotate downward relative to the upper vertical arm 112; as Figure 14 As shown, when the clamping arm 111 rotates to its position relative to the upper arm 112, forming a clamping opening to clamp the blade 1, the second driving member 1182 pushes the locking wedge 1181 to the left to the locking position. That is, the locking wedge 1181 is embedded between the first end of the second telescopic cylinder and the support frame 1183, and the inclined surface of the locking wedge 1181 abuts against the lower part of the first end of the second telescopic cylinder, thereby restricting the retraction of the first end of the second telescopic cylinder. Simultaneously, if the blade is installed, the second driving member 1182 drives the locking wedge 1181 to the right to the unlocking position. At this time, the first end of the second telescopic cylinder can freely extend and retract, causing the clamping opening to loosen and the blade to be released, thus completing the safe disassembly of the blade.

[0092] The piston rod of the second telescopic cylinder may be provided with a protrusion so that when the locking wedge 1181 is located between the first end of the telescopic cylinder of the pitch telescopic drive mechanism and the support frame 1183, the end of the piston rod can interfere with the locking wedge 1181, thereby preventing the piston rod from retracting.

[0093] However, this disclosure is not limited thereto. In another embodiment, such as Figure 15 As shown, the stop may include a baffle 1185 and an eccentric wheel 1186. The baffle 1185 is mounted on the upper arm 112 and arranged in the extension and retraction path of the piston rod of the second telescopic cylinder, for example, mounted on the inner surface of the upper arm 112. The eccentric wheel 1186 is mounted on the end of the piston rod of the second telescopic cylinder and can rotate to a locked position and an unlocked position. In the locked position, the eccentric wheel 1186 abuts against the baffle 1185, thereby restricting the extension and retraction of the piston rod of the second telescopic cylinder; in the unlocked position, the eccentric wheel 1186 disengages from the baffle 1185, thereby allowing the first end of the second telescopic cylinder to extend and retract. The eccentric wheel 1186 may be disc-shaped, including a long diameter end and a short diameter end. A predetermined gap is provided between the baffle 1185 and the piston rod of the second telescopic cylinder, which is greater than the end diameter of the eccentric wheel 1186 and less than the long diameter of the eccentric wheel 1186. In the locked position, the long diameter end rotates to the baffle 1185 and abuts against the baffle 1185 to prevent the piston rod of the second telescopic cylinder from retracting. In the unlocked position, the short diameter end rotates to the baffle 1185 and separates from the baffle 1185, allowing the piston rod to freely extend and retract through the baffle 1185.

[0094] Similarly, to allow the eccentric wheel 1186 to switch between its locked and unlocked positions, the second locking assembly 118 may also include a third drive member 1187, which may be a telescopic drive member, such as a hydraulic cylinder, pneumatic cylinder, or lead screw. In the example shown in the figures, the third drive member 1187 may be a telescopic cylinder, the cylinder body of which may be mounted on the clamping arm 111, and the piston rod of the third drive member 1187 is hinged to the eccentric wheel 1186 for driving the eccentric wheel 1186 to rotate between the locked and unlocked positions.

[0095] The specific structures of the clamp adjustment unit 115, angle adjustment unit 117, first locking component 116, and second locking component 118 for adjusting and locking the opening degree of the clamping port are described above with reference to the accompanying drawings.

[0096] Furthermore, in this embodiment, the upper clamping assembly 140 and the lower clamping assembly 150 are respectively provided with an upper limit block 1142 and a lower limit block 1141 for checking after the blade is installed in place, to ensure that the blade is properly installed and fitted. One end of the upper limit block 1142 can be fixedly connected to the upper support arm 112, and the other end of the upper limit block 1142 can be provided with a flexible pad to flexibly contact the surface of the blade and prevent scratching the blade. One end of the lower limit block 1141 can be fixedly connected to the lower support arm 114, and the other end of the lower limit block 1141 can also be provided with a flexible pad. Preferably, the upper limit block 1142 can be provided at the corner of the upper clamping assembly 140 formed by the upper support arm 112 and the clamping arm 111, and the lower limit block 1141 can be provided at the corner of the lower clamping assembly 150 formed by the lower support arm 114 and the supporting arm 113.

[0097] Figure 16 A schematic diagram of a blade clamp according to an exemplary embodiment of the present disclosure is shown. Figure 17 It shows Figure 16 The diagram shows the state of the blade clamp before the blade pitches. Figure 18 It shows Figure 16 The blade clamp is used to illustrate the state of the blade after pitching.

[0098] Reference Figures 16 to 18 The blade clamp 100 may further include a pitch drive member 141 for driving the blade clamping units 110 and 130 to rotate relative to the main beam 120; a guide rail 142 formed on one of the blade clamping units 110 and 130 and the main beam 120; and a track groove 143 formed on the other of the blade clamping units 110 and 130 and the main beam 120 and movable relative to the guide rail 142.

[0099] According to the exemplary embodiments of this disclosure, the blade clamp can perform small-range pitch control on the blade 1 during the assembly and hoisting processes of the wind turbine generator set, thereby aligning the blade 1 with the hub and accurately connecting it to the hub. During the pitch control process, the cooperation of the guide rail 142 and the track groove 143 helps the blade clamping units 110 and 130 rotate stably relative to the main beam 120, thus ensuring the safety and stability of the blade clamp 100 carrying the blade 1 during the pitch control process. For example, but not limited to, the blade hoisting fixture provided in this embodiment can perform pitch control within an angle range of -10° to +10°.

[0100] Specifically, the pitch drive component 141 is a linear telescopic drive mechanism. One end of the pitch drive component 141 is hinged to the lower part of the lower support arm 114, and the other end is hinged to the end of the main beam 120. The linear telescopic movement of the pitch drive component 141 drives the blade clamping units 110 and 130 to rotate relative to the main beam 120. The linear telescopic drive mechanism is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is mounted on the main beam 120, and the end of the piston rod of the hydraulic cylinder is connected to the lower support arm 114. Both ends of the main beam 120 have receiving spaces to accommodate the hydraulic cylinder. The end of the piston rod of the hydraulic cylinder is connected to the lower support arm 114 through a connecting post perpendicular to the lower support arm 114. Opening slots 146 are formed on the lower part of both ends of the main beam 120 to avoid interference between the connecting post and the pitch drive component 141. The opening slots 146 are openings extending along the telescopic direction of the pitch drive component 141. A guide rail 142 is also formed on the opposite side surface of the lower support arm 114.

[0101] Reference Figures 8 to 10 as well as Figure 15 Both the upper clamping assembly 140 and the lower clamping assembly 150 may include a conformal clamping member 119 and a clamping member drive unit 1131 for pushing the conformal clamping member 119 to move along the extension direction of the clamping arm 111 or the support arm 113. The clamping member drive unit 1131 may include a cylinder and a piston rod. Specifically, the free end of the piston rod may be hinged to the conformal clamping member 119, and the free end of the cylinder may be hinged to the clamping arm 111 or the support arm 113, so that the conformal clamping member 119 is moved by the extension and retraction of the piston rod relative to the cylinder, so that the conformal clamping member 119 is in a position that is in close contact with the blade. That is to say, by adjusting the contact degree between the blade and the conformal clamping member 119, the blade clamping is made more stable, thereby improving the safety during the blade installation process. The extension and retraction direction of the clamping member drive unit 1131 is parallel to the extension direction of the clamping arm 111 or the support arm 113. Furthermore, the clamping drive unit 1131 is sleeved in the inner cavity of the clamping arm 111 or the supporting arm 113 to make the overall structure of the blade clamping unit aesthetically pleasing.

[0102] The conformal clamping member 119 may be composed of a component whose shape or angle can be adjusted according to the action of external force, so that it can conformally fit the surface of the blade 1 according to the size and airfoil of the blade 1 when clamping the blade 1. The conformal clamping members 119 in the upper clamping assembly and the lower clamping assembly have similar structures and face each other. Hereinafter, the conformal clamping member 119 in the upper clamping assembly will be used as an example to describe its structure and its connection relationship with other components in detail.

[0103] The conformal clamping member 119 is rotatable about a first deflection shaft 1191 and a second deflection shaft 1192. The first deflection shaft 1191 extends along the length direction of the blade, and the second deflection shaft 1192 extends along the chordal direction of the blade. The chordal direction of the blade 1 is perpendicular to the length direction of the blade 1 and can be the direction from the leading edge to the trailing edge of the blade. In other words, the chordal direction of the blade is consistent with the extension direction of the clamping arm 111.

[0104] The conformal clamping member 119 of the upper clamping assembly may include a deflection support 1193 and a clamping block 1194. One side of the deflection support 1193 is rotatably connected to the clamping arm 111 via a first deflection shaft 1191; the clamping block 1194 is rotatably connected to the other side of the deflection support 1193 via a second deflection shaft 1192, thereby ensuring the fit between the clamping block 1194 and the blade 1 in the lateral and longitudinal directions during the clamping process, so that the conformal clamping member 119 can adapt to different profile changes of the blade.

[0105] The specific structure of the conformal clamping member 119 of the lower clamping assembly is the same as that of the conformal clamping member 119 of the upper clamping assembly. The difference is that the deflection support 1193 of the conformal clamping member 119 of the lower clamping assembly is rotatably connected to the support arm 113, and the clamping blocks 1194 of the conformal clamping members 119 of the upper and lower clamping assemblies face each other.

[0106] Optionally, the conformal clamping member 119 may further include a yaw frame 1195 and a displacement screw 1196. The yaw frame 1195 is connected to the displacement screw 1196 and can move along the chordal direction of the blade 1 under the push of the displacement screw 1196. Figure 4 and Figure 5 (as shown in the X direction) move back and forth ( Figure 4 and Figure 5 The position of the conformal clamping member 119 in the extension direction of the clamping arm 111 is adjusted by moving it left and right in the middle. The first deflection shaft 1191 can be mounted on the deflection frame 1195. After each installation and confirmation of the blade shape, the radial deviation caused by the center of gravity of different blade shapes can be adapted by manually adjusting the displacement screw 1196 on the ground.

[0107] Optionally, the surface of the clamping block 1194 in contact with the blade 1 may be covered with a layer of rubber, nylon, etc., to prevent damage to the blade when it collides with the blade during clamping, increase buffering capacity and reduce wear on the blade.

[0108] The blade lifting fixture disclosed herein eliminates the need for additional turning gear fixtures, thus avoiding the risks associated with using turning gear fixtures and horizontal blade lifting fixtures when installing blades as they become larger. This reduces the development cost of the blade lifting fixture, simplifies the installation process, and minimizes the number of interfaces.

[0109] The blade lifting fixture has independent pitch and pitch rotation functions, enabling both pitch rotation and pitch rotation of the fixture with blade 1 in mid-air. Furthermore, this blade lifting fixture has a large pitch rotation angle range of +40° to -220° and a large pitch rotation angle range of -10° to +10°, resolving the problems and risks associated with current blade lifting fixtures that have a small adjustment range (30°) when installing blades. In addition, the blade lifting fixture provided in this disclosure is equipped with a wind-guiding system, which solves the problem of high installation costs caused by the need for additional wind-guiding systems in current horizontal and 30° angled blade lifting fixtures. It eliminates the need for separate purchases or additional wind-guiding systems on the crane, ensuring the blade remains stable during lifting and docking. The blade lifting fixture has a real-time center of gravity adjustment function. As the blade lifting fixture moves in the air with the blade, performing pitch and pitch rotations, the overall center of gravity of the blade and the lifting fixture changes. The operator can adjust the top lifting point in real time via the operating handle to ensure the lifting device and blade are balanced. The movement function of the upper clamping assembly 140 of the blade lifting fixture can serve as an emergency release system. Under normal circumstances, the upper clamping assembly 140 clamps the blade with its clamping arm 111. If, after the blade is installed, the clamping arm 111 cannot open, and the blade lifting fixture cannot detach from the blade, the angle adjustment unit 117 can be moved upwards. This creates a sufficient gap between the upper clamping assembly 140 and the blade, allowing the blade lifting fixture to detach from the blade.

[0110] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0111] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0112] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0113] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the foregoing description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

Claims

1. A blade lifting fixture, characterized in that, The blade lifting fixture includes a pitch rotation mechanism (600) and a blade clamp (100). The pitch rotation mechanism (600) includes a support frame (610), a pitch rotation shaft (620), and a rotation shaft drive assembly. The pitch rotation shaft (620) is rotatably mounted on the support frame (610), and the first end of the pitch rotation shaft (620) is connected to the blade clamp (100), and the second end of the pitch rotation shaft (620) is connected to the rotation shaft drive assembly. The rotary shaft drive assembly is connected, and includes a worm gear (6301) and a worm (6302) that drives the worm gear (6301) to rotate. The worm gear (6301) is coaxially arranged with the pitch rotation shaft (620) and fixed to the second end of the pitch rotation shaft (620), so that the worm gear (6301) is driven to rotate through the worm (6302), thereby driving the blade clamp (100) to rotate, thereby adjusting the pitch angle of the blade (1). The blade clamp (100) includes a blade clamping unit, an angle adjustment unit (117), and a second locking assembly (118). The blade clamping unit includes an upper clamping assembly (140) for clamping the blade (1) above it. The upper clamping assembly (140) includes a clamping arm (111) and an upper upright arm (112). The upper part of the upper upright arm (112) is rotatably connected to the clamping arm (111). The angle adjustment unit (117) includes a second telescopic cylinder. The first end of the second telescopic cylinder is hinged to the end of the pressing arm (111) and can extend and retract. The second end of the second telescopic cylinder is hinged to the lower part of the upper upright arm (112). The extension and retraction of the second telescopic cylinder drives the pressing arm (111) to rotate relative to the upper upright arm (112). The second locking assembly (118) is used to lock the clamping arm (111) relative to the upper upright arm (112), and the second locking assembly (118) includes a stop for restricting the retraction of the first end of the second telescopic cylinder. The stop is a locking wedge (1181), which has a locked position and an unlocked position. The locking wedge (1181) has an inclined surface (1181a). In the locked position, the inclined surface of the locking wedge (1181) abuts against the lower part of the first end of the second telescopic cylinder in the direction of retraction of the first end of the second telescopic cylinder, so as to restrict the retraction of the first end of the second telescopic cylinder. In the unlocked position, the locking wedge (1181) disengages from the first end of the second telescopic cylinder. or The stop portion includes: A baffle (1185) is mounted on the upper arm (112) and arranged on the telescopic path of the first end of the second telescopic cylinder; and An eccentric wheel (1186) is mounted on the clamping arm (111). The eccentric wheel (1186) is rotatably mounted on the end of the first end of the second telescopic cylinder and can rotate relative to the clamping arm (111) to a locked position and an unlocked position. In the locked position, the eccentric wheel (1186) abuts against the baffle (1185), thereby restricting the extension and retraction of the first end of the second telescopic cylinder. In the unlocked position, the eccentric wheel (1186) disengages from the baffle (1185), thereby allowing the first end of the second telescopic cylinder to extend and retract.

2. The blade lifting fixture as described in claim 1, characterized in that, There are two worm gears (6302), which are symmetrically arranged on both sides of the worm wheel (6301).

3. The blade lifting fixture as described in claim 1, characterized in that, The blade lifting fixture also includes a hanger (200), and a pitch rotation shaft (650) is provided on the support frame (610). The pitch rotation shaft (650) is rotatably mounted to the lower end of the hanger (200). The rotation axis of the pitch rotation shaft (650) is arranged perpendicular to the rotation axis of the pitch rotation shaft (620) and parallel to the length direction of the blade clamp (100).

4. The blade lifting fixture as described in claim 3, characterized in that, The blade lifting fixture also includes a pitch drive mechanism (640), the first end of which is hinged to the hanger (200), and the second end of which is hinged to the support frame (610).

5. The blade lifting fixture as described in claim 4, characterized in that, The hanger (200) includes two downwardly extending vertical beams (230) spaced apart, a support frame (610) disposed between the two vertical beams (230), and a pitch rotation shaft (650) extending from both sides of the support frame (610) and rotatably connected to the two vertical beams (230).

6. The blade lifting fixture as described in claim 5, characterized in that, The pitch rotation shaft (650) consists of two rotating shaft segments, coaxially arranged on both sides of the support frame (610).

7. The blade lifting fixture as described in claim 5, characterized in that, The pitch drive mechanism (640) is a telescopic hydraulic cylinder. There are two pitch drive mechanisms (640). The support frame (610) includes a support base (613) and two support plates (611). The two support plates (611) are disposed on the side surface of the support base (613) and located on both sides of the rotary shaft drive assembly. The piston rod (642) of the telescopic hydraulic cylinder is connected to the support plate (611), and the cylinder body (641) of the telescopic hydraulic cylinder is connected to the hanger (200).

8. The blade lifting fixture as described in claim 7, characterized in that, The first end of the support plate (611) is provided with a pitch drive pivot shaft (612), the free end of the piston rod (642) is pivotally connected to the pitch drive pivot shaft (612), and the free end of the cylinder (641) is pivotally connected to the blade clamp (100).

9. The blade lifting fixture as described in any one of claims 1-8, characterized in that, The blade clamp (100) includes a main beam (120), the second end of the pitch rotation shaft (620) is provided with a spline, and the middle part of the main beam (120) is provided with a spline groove that matches the spline.

10. The blade lifting fixture as described in claim 9, characterized in that, The blade clamping units (110, 130) are two in number and are respectively located at both ends of the main beam (120). The pitch rotation mechanism (600) is connected to the main beam (120) and can drive the main beam (120) to rotate around the pitch rotation axis (620).

11. The blade lifting fixture as described in claim 10, characterized in that, The blade clamping unit (110, 130) further includes a lower clamping assembly (150) and a clamping adjustment unit (115). The clamping adjustment unit (115) includes a first telescopic hydraulic cylinder. The two ends of the clamping adjustment unit (115) are respectively connected between the upper clamping assembly (140) and the lower clamping assembly (150) for adjusting the size of the clamping opening formed by the upper clamping assembly (140) and the lower clamping assembly (150).

12. The blade lifting fixture as described in claim 11, characterized in that, The upper clamping assembly (140) includes a first locking assembly (116), and the lower clamping assembly (150) includes a support arm (113) and a lower upright arm (114) extending upward from one end of the support arm (113). The lower upright arm (114) is connected to the upper upright arm (112), such that the upper clamping assembly (140) and the lower clamping assembly (150) form a space for clamping the blade. The first locking assembly (116) is used to lock the upper upright arm (112) relative to the lower upright arm (114).

13. The blade lifting fixture according to claim 12, characterized in that, The upper part of the upper arm (112) is provided with a pivot shaft (1121), and the clamping arm (111) is connected to the upper arm (112) through the pivot shaft (1121). The angle adjustment unit (117) is used to drive the clamping arm (111) to rotate relative to the upper vertical arm (112) to adjust the tilt angle of the clamping arm (111) relative to the upper vertical arm (112). The second telescopic cylinder drives the clamping arm (111) to pivot around the pivot axis (1121).

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