Blade Root Storage and Hoisting Device and Its Assembly Method

Abstract

The present invention provides a root storage and hoisting device, comprising: a root base, with four sling rollers IV provided at the bottom, and sling rollers III, II, and I are sequentially arranged above the sling roller IV; root lifting lugs and load distribution chutes are provided on both sides of the root base; a load distribution mechanism, which is rotatably connected to both sides of the root base and slidably connected to the load distribution chutes, and the sling roller III is arranged on the load distribution mechanism; two annular flexible slings, which are wound from the lower side of the sling roller IV, then wound from the upper side of the sling roller I, then wound from the lower side of the sling roller III, and finally wound from the upper side of the sling roller II. By adopting the present invention, only one set of device is required for the transportation, storage, and hoisting of the blade; the bearing capacity of the two annular flexible slings can be automatically balanced; it can not only provide a supporting force but also does not affect the rotation during the attitude adjustment of the root, and it is convenient to disengage from the blade after the operation is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting devices for wind turbines; specifically, it relates to a blade root storage and hoisting device and an assembly method thereof. Background Art

[0002] After the wind turbine blades are transported to the site, the blades need to be placed in the equipment storage area according to the plan of the manufacturer or the design institute for subsequent hoisting. To ensure the safety of blade storage, the blades are usually stored horizontally, that is, after the blades are placed on a special storage bracket, they are stored in a lying state to minimize the center of gravity height of the blades during storage and reduce the windward area of the blades, thereby reducing the lateral force, bending moment, torque and overturning force generated by the wind when the blades are stored.

[0003] When the blades enter the hoisting process, in order to make full use of the stiffness of the blades themselves to increase the stability of hoisting, the blades need to be changed from the horizontal state to the side-standing state, and the original inter-blade support device and blade root support device used to support the blades need to be replaced with an inter-blade hoisting device and a blade root hoisting device before the hoisting operation of the blades can be carried out.

[0004] Completing the above steps requires: a set of blade root support devices, a set of inter-blade support devices, a set of blade root hoisting devices, a set of inter-blade hoisting devices, and the attitude adjustment such as side-standing and flipping of the blades needs to be carried out by multi-crane hoisting under the influence of wind. During the attitude adjustment process, the special tools need to be replaced 4 times. The operation is difficult, the operation steps are cumbersome, the influence of the outside world is large, and the randomness of the outside influence is large. Especially when multi-crane hoisting is carried out in complex terrain, the operation is very limited, the difficulty is doubled, the safety hazards of equipment and personnel are huge, and the coordination requirements for multi-crane hoisting are extremely high. Moreover, affected by the wind, there are often adverse situations: when the hoisting operation is in progress after replacing the tooling, due to the increase in wind force, the hoisting operation cannot be carried out, and the blade needs to be put back on the ground again. After the wind speed decreases, the hoisting is carried out again. At this time, the above-mentioned attitude adjustments such as side-standing and flipping and their reverse processes need to be repeated. The better the wind resources, the easier it is to have the above-mentioned rework events, the work is cumbersome, and it affects the operation time and the safety of personnel and equipment. It can be seen that the above problems belong to major technical problems in this field. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a blade root storage and hoisting device and an assembly method thereof.

[0006] The present invention is achieved through the following technical solutions.

[0007] The blade root storage and hoisting device provided by the present invention includes:

[0008] The blade root base is symmetrically provided with four sling rollers IV at the front and back on both sides of the bottom. Above the sling roller IV, sling rollers III, II, and I are successively arranged; on both sides of the blade root base, blade root lifting lugs and load distribution sliding grooves are symmetrically arranged at the front and back.

[0009] The load distribution mechanism is rotatably connected to the middle parts on both sides of the blade root base and is slidably connected to the load distribution sliding grooves. The sling roller III is arranged at the part where the load distribution mechanism is slidably connected to the load distribution sliding grooves.

[0010] Two annular flexible slings arranged front and back. The annular flexible sling winds up from the lower side of the sling roller IV, then winds down from the upper side of the sling roller I, then winds up from the lower side of the sling roller III, and finally winds down from the upper side of the sling roller II.

[0011] On both sides of the middle part of the blade root base, coaxial limit round platforms and mounting round platforms are provided. The limit round platform is larger than the mounting round platform, and the load distribution mechanism is rotatably connected to the mounting round platform.

[0012] The load distribution mechanism includes a limit block, a load distribution slider, a balance plate, a limit cover plate, and a load distribution bracket. The load distribution slider is arranged on the load distribution sliding groove, and the limit block is arranged outside the blade root base and fixedly connected to the load distribution slider; the middle part of the balance plate is sleeved on the mounting round platform, and the limit cover plate covers the balance plate and is fixedly connected to the mounting round platform; long-shaped sliding grooves are symmetrically arranged at both ends of the balance plate, and a load distribution round platform tangent to the sliding groove is arranged on the end face of the load distribution slider. The load distribution bracket covers the balance plate and is fixedly connected to the load distribution slider; the sling roller III is installed on the load distribution bracket.

[0013] The limit cover plate is provided with a cover plate square boss, and a square groove is correspondingly provided on the mounting round platform. The cover plate square boss extends into the square groove and is fixed by bolts.

[0014] The load distribution bracket is provided with a bracket square boss, and a square groove is correspondingly provided on the load distribution round platform. The bracket square boss extends into the square groove and is fixed by bolts.

[0015] The limit block is an angle steel.

[0016] The limit block and the load distribution slider are connected by bolts.

[0017] The sling rollers I, II, III, and IV are respectively connected by the axis.

[0018] In the front projection, the sling roller I and the sling roller IV are arranged vertically and are located outside the sling roller III. The sling roller II is located inside the sling roller III and is lower in height than the sling roller I.

[0019] The present invention also provides an assembly method for the above-mentioned blade root storage and hoisting device, including the following steps:

[0020] ① Install the load distribution mechanism. First, complete the assembly with the load distribution chute, and then complete the rotational connection between the load distribution mechanism and both sides of the blade root base.

[0021] ② Install the sling roller shafts one, two, three, and four in groups of four, and synchronously install the annular flexible sling.

[0022] When installing the load distribution mechanism, insert the four load distribution sliders into the corresponding load distribution chutes respectively, and assemble the corresponding limit blocks; put the balance plate on the installation round table, and install the load distribution round table into the sliding groove; connect the limit cover plate with the installation round table; connect the load distribution bracket with the load distribution slider.

[0023] The beneficial effects of the present invention are as follows:

[0024] It solves major technical problems in the field. (1) Only one set of device is required for the transportation, storage (or water transportation) and hoisting of the blade; (2) The conversion during the transportation, storage (or water transportation) and hoisting processes does not require external intervention, no need to disassemble and assemble the transportation and hoisting device, and no need for multi-machine lifting for attitude adjustment; (3) When entering the hoisting state, even if there is a need to rework due to strong wind, just release the hook and lower the device directly; (4) It can adapt to the storage (or water transportation), transportation and hoisting of blade roots with different diameters, tapers and shapes; (5) Under the adjustment of the automatic load distribution mechanism, it can automatically balance the bearing capacity of the two annular flexible slings, preventing local stress of the equipment from being too large and causing damage; (6) The sling can not only provide support force, but also does not affect the rotation during the attitude adjustment of the blade root, and it is convenient to disengage from the blade after the operation is completed. Brief Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the present invention.

[0026] Figure 2 It is an assembly schematic diagram of the blade root base.

[0027] Figure 3 It is a schematic structural diagram of the blade root base.

[0028] Figure 4 It is Figure 3 Detail drawing of part A of

[0029] Figure 5 It is a schematic structural diagram of the load distribution mechanism.

[0030] Figure 6 It is the first axonometric exploded view of the load distribution mechanism.

[0031] Figure 7 It is the second axonometric exploded view of the load distribution mechanism.

[0032] In the figure: 101 - blade root base; 102 - load distribution mechanism; 103 - annular flexible sling; 104 - sling roller one; 105 - sling roller two; 106 - sling roller three; 107 - sling roller four; 108 - blade root lifting lug; 109 - load distribution chute; 110 - limiting round platform; 111 - mounting round platform; 112 - limiting block; 113 - load distribution slider; 114 - balance plate; 115 - limiting cover plate; 116 - load distribution bracket; 117 - load distribution round platform; 118 - sliding chute; 119 - cover plate square boss; 120 - bracket square boss. Specific implementation mode

[0033] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0034] As Figures 1 to 7 shown is a schematic structural diagram of the present invention:

[0035] The present invention provides a blade root storage and lifting device, including:

[0036] The blade root base 101 is symmetrically provided with four sling rollers four 107 on the front and rear sides of the bottom, and above the sling roller four 107, there are successively a sling roller three 106, a sling roller two 105, and a sling roller one 104; on both sides of the blade root base 101, there are symmetrically arranged blade root lifting lugs 108 and load distribution chutes 109.

[0037] The load distribution mechanism 102 is rotationally connected to the middle parts on both sides of the blade root base 101 and is slidably connected to the load distribution chute 109, and the sling roller three 106 is arranged at the part where the load distribution mechanism 102 is slidably connected to the load distribution chute 109.

[0038] Two annular flexible slings 103 arranged front and rear, the annular flexible sling 103 winds up from the lower side of the sling roller four 107, then winds down from the upper side of the sling roller one 104, then winds up from the lower side of the sling roller three 106, and finally winds down from the upper side of the sling roller two 105.

[0039] Assemble in the following order: ① Install the load distribution mechanism 102, first complete the assembly with the load distribution chute 109, and then complete the rotational connection between the load distribution mechanism 102 and both sides of the blade root base 101; ② Install the sling roller one 104, the sling roller two 105, the sling roller three 106, and the sling roller four 107 in groups of four, and synchronously install the annular flexible sling 103.

[0040] Principle: According to the marking of the center of gravity of the wind turbine blade by the wind turbine equipment manufacturer, a certain part of the blade root of the wind turbine blade is placed on the blade root storage and hoisting device. When the force on one annular flexible sling 103 is greater than that on the other annular flexible sling 103, it will force the load distribution mechanism 102 on the side with greater force to tilt upward along the load distribution chute 109, causing the sling roller three 106 on this side to move upward, and the force on the annular flexible sling 103 to decrease; at the same time, the load distribution mechanism 102 rotates, causing the other side to move downward along the load distribution chute 109, causing the sling roller three 106 on this side to move downward, and the force on the annular flexible sling 103 to increase; thus forcing the two annular flexible slings 103 to bear the same supporting force. When performing attitude adjustments such as blade side-standing flipping (the flipping can be carried out through the inter-blade condition adaptive integrated device, and the inter-blade part of the blade rotates around the long axis of the blade under the drive of the inter-blade condition adaptive integrated device), the blade root rotates accordingly, and the annular flexible sling 103 can rotate together under the support of the sling roller, which not only ensures the provision of supporting force to the blade root but also does not hinder the automatic adjustment of the blade attitude. When the blade is installed in place and firmly connected to the hub, the crane slightly loosens the hook, and the blade root storage and hoisting device slightly moves downward by a certain distance. At this time, the device is separated from the blade, and then the device is moved along the long axis of the blade and finally detached from the blade, completing the transition from the storage (transportation) state to hoisting and then to detachment, which is completely automatic without external intervention.

[0041] Through the blade root storage and hoisting device of the present invention: only one set of devices is required for the transportation, storage (or water transportation), and hoisting of the blade; the conversion of the transportation, storage (or water transportation), and hoisting processes does not require external intervention, does not require disassembly, installation, transportation, and hoisting devices, and does not require multi-crane lifting for attitude adjustment; when entering the hoisting state, even if there is a need to return due to strong winds, the device can be directly lowered by loosening the hook; it can adapt to the storage (or water transportation), transportation, and hoisting of blade roots with different diameters, tapers, and shapes; under the adjustment of the automatic load distribution mechanism 102, it can automatically balance the bearing capacity of the two annular flexible slings 103, preventing local stress of the equipment from being too large and causing damage; the sling can not only provide supporting force but also does not affect the rotation during the attitude adjustment of the blade root, and it is convenient to detach from the blade after the operation is completed.

[0042] As Figure 3 、 4 shown: On both sides of the middle of the blade root base 101, there are coaxial limiting round platforms 110 and installation round platforms 111. The limiting round platform 110 is larger than the installation round platform 111, and the load distribution mechanism 102 is rotationally connected to the installation round platform 111. This makes the rotating part of the load distribution mechanism 102 not in contact with the blade root base 101, avoiding friction and causing smooth rotation.

[0043] The load distribution mechanism is as Figures 5 to 7 shown:

[0044] The load distribution mechanism 102 includes a limit block 112, a load distribution slider 113, a balance plate 114, a limit cover plate 115, and a load distribution bracket 116. The load distribution slider 113 is arranged on the load distribution chute 109, and the limit block 112 is arranged outside the blade root base 101 and fixedly connected to the load distribution slider 113. The middle part of the balance plate 114 is sleeved on the installation round table 111, and the limit cover plate 115 covers the balance plate 114 and is fixedly connected to the installation round table 111. Longitudinal sliding grooves 118 are symmetrically arranged at both ends of the balance plate 114. A load distribution round table 117 tangent to the sliding groove 118 is arranged on the end face of the load distribution slider 113. The load distribution bracket 116 covers the balance plate 114 and is fixedly connected to the load distribution slider 113. A sling roller shaft three 106 is installed on the load distribution bracket 116.

[0045] When installing the load distribution mechanism 102, insert the four load distribution sliders 113 into the corresponding load distribution chutes 109 respectively, and assemble the corresponding limit blocks 112; sleeve the balance plate 114 on the installation round table 111, and install the load distribution round table 117 into the sliding groove 118; connect the limit cover plate 115 to the installation round table 111; connect the load distribution bracket 116 to the load distribution slider 113.

[0046] When the forces on the sling roller shafts three 106 corresponding to the two annular flexible slings 103 are inconsistent, the load distribution bracket 116 and the load distribution slider 113 on the side with the greater force move upward. Through the rotation and sliding of the load distribution round table 117 in the sliding groove 118 of the balance plate 114, no structural interference will occur. At the same time, it drives the balance plate 114 to rotate around the installation round table 111, so that the load distribution bracket 116 and the load distribution slider 113 on the other side move downward, so that the two annular flexible slings 103 bear the same supporting force.

[0047] A cover plate square boss 119 is arranged on the limit cover plate 115, and a square groove is correspondingly arranged on the installation round table 111. The cover plate square boss 119 extends into the square groove and is fixed by bolts. It has good stability, prevents the limit cover plate 115 from rotating and causing the bolts to loosen, and improves safety.

[0048] A bracket square boss 120 is arranged on the load distribution bracket 116, and a square groove is correspondingly arranged on the load distribution round table 117. The bracket square boss 120 extends into the square groove and is fixed by bolts. It prevents the bolts from being directly stressed and prevents the load distribution bracket 116 from rotating, improving safety.

[0049] The limit block 112 is an angle steel. The two wing plates of the angle steel are in contact with the blade root base 101 and the load distribution slider 113. It has good stability, uniform stress, and smooth sliding.

[0050] The limiting block 112 and the load distribution slider 113 are connected by bolts. It has good stability and is convenient for assembly.

[0051] The first sling roller shaft 104, the second sling roller shaft 105, the third sling roller shaft 106, and the fourth sling roller shaft 107 are respectively connected through the shaft centers. The resistance is small, and the force adjustment uniformity of the two annular flexible slings 103 is good.

[0052] In the front projection, the first sling roller shaft 104 and the fourth sling roller shaft 107 are arranged vertically and are located outside the third sling roller shaft 106. The second sling roller shaft 105 is located inside the third sling roller shaft 106 and has a height lower than that of the first sling roller shaft 104. The length of the annular flexible sling 103 occupied between the roller shafts is the smallest, the force transmission is fast, and the forces on each roller shaft are uniform.

[0053] The present invention also provides an assembly method for the above-mentioned blade root storage and hoisting device, including the following steps:

[0054] ① Install the load distribution mechanism 102. First, complete the assembly with the load distribution chute 109, and then complete the rotational connection between the load distribution mechanism 102 and both sides of the blade root base 101.

[0055] ② Install the first sling roller shaft 104, the second sling roller shaft 105, the third sling roller shaft 106, and the fourth sling roller shaft 107 group by group in four groups, and synchronously install the annular flexible sling 103.

[0056] When installing the load distribution mechanism 102, insert the four load distribution sliders 113 into the corresponding load distribution chutes 109 respectively, and assemble the corresponding limiting blocks 112; sleeved the balance plate 114 on the installation round table 111, and install the load distribution round table 117 into the sliding groove 118; connect the limiting cover plate 115 with the installation round table 111; connect the load distribution bracket 116 with the load distribution slider 113. When the forces on the third sling roller shafts 106 corresponding to the two annular flexible slings 103 are inconsistent, the load distribution brackets 116 and the load distribution sliders 113 on the side with the greater force move upward. Through the rotation and sliding of the load distribution round table 117 in the sliding groove 118 of the balance plate 114, no structural interference will occur; at the same time, drive the balance plate 114 to rotate around the installation round table 111, so that the load distribution brackets 116 and the load distribution sliders 113 on the other side move downward, so that the two annular flexible slings 103 bear the same supporting force.

Claims

1. A root storage and lifting device, characterized in that: Comprising: A blade root base (101), on both sides of the bottom, four sling rollers four (107) are symmetrically arranged front and back. Above the sling rollers four (107), sling rollers three (106), sling rollers two (105), and sling rollers one (104) are successively arranged; on both sides of the blade root base (101), blade root lifting lugs (108) and load distribution sliding grooves (109) are symmetrically arranged front and back; A load distribution mechanism (102), rotatably connected to the middle parts on both sides of the blade root base (101) and slidably connected to the load distribution sliding grooves (109). The sling rollers three (106) are arranged at the part where the load distribution mechanism (102) is slidably connected to the load distribution sliding grooves (109); Two annular flexible slings (103) arranged front and back. The annular flexible slings (103) wind up from the lower side of the sling rollers four (107), then wind down from the upper side of the sling rollers one (104), then wind up from the lower side of the sling rollers three (106), and finally wind down from the upper side of the sling rollers two (105).

2. The root storage and lifting device according to claim 1, characterized in that: On both sides of the middle part of the blade root base (101), coaxial limiting round platforms (110) and mounting round platforms (111) are provided. The limiting round platforms (110) are larger than the mounting round platforms (111), and the load distribution mechanism (102) is rotatably connected to the mounting round platforms (111).

3. The root storage and lifting device according to claim 2, characterized in that: The load distribution mechanism (102) includes a limiting block (112), a load distribution slider (113), a balance plate (114), a limiting cover plate (115), and a load distribution bracket (116). The load distribution slider (113) is arranged on the load distribution sliding groove (109), and the limiting block (112) is arranged on the outer side of the blade root base (101) and fixedly connected to the load distribution slider (113); the middle part of the balance plate (114) is sleeved on the mounting round platform (111), and the limiting cover plate (115) covers the balance plate (114) and is fixedly connected to the mounting round platform (111); on both ends of the balance plate (114), long-shaped sliding grooves (118) are symmetrically provided. On the end face of the load distribution slider (113), a load distribution round platform (117) tangent to the sliding grooves (118) is provided. The load distribution bracket (116) covers the balance plate (114) and is fixedly connected to the load distribution slider (113); the sling rollers three (106) are installed on the load distribution bracket (116).

4. The root storage and lifting device according to claim 3, characterized in that: On the limiting cover plate (115), a cover plate square boss (119) is provided. On the mounting round platform (111), a square groove is correspondingly provided. The cover plate square boss (119) extends into the square groove and is fixed by bolts.

5. The root storage and lifting device according to claim 3, characterized in that: On the load distribution bracket (116), a bracket square boss (120) is provided. On the load distribution round platform (117), a square groove is correspondingly provided. The bracket square boss (120) extends into the square groove and is fixed by bolts.

6. The root storage and lifting device according to claim 3, characterized in that: The limiting block (112) is an angle steel.

7. The root storage and lifting device according to claim 6, characterized in that: The limiting block (112) and the load distribution slider (113) are connected by bolts.

8. The root storage and lifting device according to claim 1, characterized in that: The sling rollers one (104), sling rollers two (105), sling rollers three (106), and sling rollers four (107) are respectively connected by axles.

9. The root storage and lifting device according to claim 8, characterized in that: In the front projection, the first sling roller shaft (104) and the fourth sling roller shaft (107) are arranged vertically and are located outside the third sling roller shaft (106). The second sling roller shaft (105) is located inside the third sling roller shaft (106) and is lower in height than the first sling roller shaft (104).

10. The assembly method of the root storage and lifting device according to any one of claims 1 to 9, characterized in that: It includes the following steps ① Install the load distribution mechanism (102). First, complete the assembly with the load distribution chute (109), and then complete the rotational connection of the load distribution mechanism (102) on both sides of the blade root base (101). ② Install the first sling roller shaft (104), the second sling roller shaft (105), the third sling roller shaft (106), and the fourth sling roller shaft (107) in groups of four, and synchronously install the annular flexible sling (103).

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