Blade hoisting bolt pre-tightening structure of wind generating set

Abstract

The utility model provides a wind generating set blade hoisting bolt pre-tightening structure, which relates to the technical field of wind generating set blade hoisting and comprises a wind generating set hub, and three wind generating set blades which are arranged in a circumferential manner are mounted on the outer surface of the wind generating set hub. Three hub mounting plates are mounted on the inner wall of the wind driven generator hub, the inner wall of each wind driven generator blade is in threaded connection with sixty blade bolts, and each blade bolt is matched with the corresponding hub mounting plate. Twelve positioning assemblies are arranged outside the wind driven generator hub. According to the blade hoisting bolt pre-tightening structure of the wind generating set, the wind generating set hub, the wind generating set blade, the hub mounting plate, the blade bolt and the positioning assembly are arranged, so that the blade bolt can be quickly aligned to a mounting hole of the hub mounting plate, and the time for adjusting the position of the blade bolt at a high altitude is shortened; and the installation speed of the wind driven generator blade is improved.

Description

Technical Field

[0001] The utility model relates to AA, in particular to a pre-tightening structure for hoisting bolts of blades of a wind generator set, and belongs to the technical field of hoisting blades of a wind generator set. Background Art

[0002] As one of the renewable clean energy sources, wind energy is an important part of new energy. After years of development, wind power development has formed a relatively mature technology. At present, the commonly used wind turbine blade hoisting methods include three-blade and rabbit ear. The three-blade hoisting method first assembles the blades and the hub into a whole, and then hoists the assembly as a whole. The rabbit ear hoisting method first assembles the hub and two of the blades to form a structure similar to rabbit ears, and then hoists the assembly. After the hoisting is completed, the third blade is hoisted.

[0003] In the blade mounting structure and wind turbine generator set disclosed in the disclosure of Chinese patent application CN220168073U, the guide structure of the device can play a guiding role, making it easier for the blade bolt to enter the mounting hole, and then the blade bolt and the mounting hole can be connected, so that the wind blade can be installed on the pitch bearing. The problem of difficult installation caused by position deviation during the docking installation process can be avoided.

[0004] However, during the implementation of the technical solution of the above patent, the blade bolt may just hit the end face between two adjacent mounting holes when the blade is installed. When the blade is hoisted to a high altitude and installed on the hub, due to the large blade and the influence of high-altitude wind, it is difficult to align the blade bolt with the mounting hole. The blade needs to be adjusted in the air for a long time before the blade bolt can be installed in the mounting hole, resulting in a long installation time for the blade. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a pre-tightening structure for the hanging bolts of the blades of a wind turbine generator set in order to solve the above-mentioned problem, so as to solve the problem in the prior art that the blade bolts are difficult to align with the mounting holes when the blades are installed.

[0007] (II) Technical solution

[0008] The utility model is implemented through the following technical solutions: a wind turbine blade hanging bolt pre-tightening structure comprises a wind turbine hub, the outer surface of the wind turbine hub is mounted with three circumferentially arranged wind turbine blades, the inner wall of the wind turbine hub is mounted with three hub mounting plates, the inner wall of each wind turbine blade is threadedly connected with sixty blade bolts, and each blade bolt is matched with the hub mounting plate; twelve positioning components are arranged on the outside of the wind turbine hub, the positioning components comprise a first mounting frame, a second mounting frame and a connecting plate, the first mounting frame is matched with the blade bolts, a side of the first mounting frame away from the blade bolts is fixedly connected with an L-shaped rod, the second mounting frame is matched with the hub mounting plate, the outer surface of the second mounting frame is fixedly connected with a guide tube, the outer surface of the guide tube is fixedly connected with a guide bucket, and the guide tube and the guide bucket are both matched with the L-shaped rod.

[0009] Furthermore, a side of the connecting plate close to the hub mounting plate is fixedly connected to a limiting rod, the limiting rod is adapted to the hub mounting plate, and the limiting rod can be inserted into the mounting hole of the hub mounting plate to position the connecting plate.

[0010] Furthermore, the connecting plate is fixedly connected to a limiting block on one side close to the hub mounting plate, and the limiting block is adapted to the second mounting frame. The limiting block can be inserted into the second mounting frame, and the second mounting frame is positioned under the connection of the limiting rod, the connecting plate and the limiting block.

[0011] Preferably, a clamping block is installed on the outer surface of the first mounting frame, and two fixing rods are fixedly connected to a side of the first mounting frame close to the clamping block. Both of the two fixing rods pass through the clamping block and are slidably connected to the clamping block, and the fixing rods serve as a guide for the movement of the clamping block.

[0012] The inner wall of the first mounting frame is threadedly connected with two first fastening bolts, and the two first fastening bolts both pass through the clamping block and are compatible with the clamping block. The clamping block is provided with a reserved hole compatible with the first fastening bolt. The first fastening bolt is passed through the reserved hole of the clamping block and then screwed into the first mounting frame, so that the clamping block can be installed on the first mounting frame.

[0013] Furthermore, the inner wall of the second mounting frame is threadedly connected with a second fastening bolt, the second fastening bolt is adapted to the wheel hub mounting plate, and the second fastening bolt is tightened into the second mounting frame and supports the wheel hub mounting plate, so as to fix the second mounting frame on the wheel hub mounting plate.

[0014] The utility model provides a wind turbine blade hoisting bolt pre-tightening structure, which has the following beneficial effects:

[0015] 1. The wind turbine blade hoisting bolt pre-tightening structure can quickly align the blade bolts with the mounting holes of the hub mounting plate through the arrangement of the wind turbine hub, wind turbine blades, hub mounting plate, blade bolts and positioning components, thereby reducing the time for adjusting the position of the blade bolts at high altitudes, and improving the installation speed of the wind turbine blades, making it easier to use.

[0016] 2. The wind turbine blade hanging bolt pre-tightening structure is provided with a first mounting frame, a clamping block, a first fastening bolt, a second mounting frame and a second fastening bolt. After the blade bolt is aligned with the mounting hole of the hub mounting plate, the blade bolt is partially inserted into the mounting hole of the hub mounting plate. Then the worker unscrews the first fastening bolt to remove the clamping block from the first mounting frame, and then unscrews the second fastening bolt to remove the second mounting frame from the hub mounting plate. Then the second mounting frame, the guide tube, the L-shaped rod and the first mounting frame can be removed at the same time without affecting the subsequent installation of the wind turbine blades on the hub mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the split structure of the wind turbine hub, wind turbine blades and hub mounting plate of the utility model;

[0019] Figure 3 It is a schematic diagram of the split structure of the blade bolt, the first mounting frame and the clamping block of the utility model;

[0020] Figure 4 It is a schematic diagram of the split structure of the wheel hub mounting plate and the limiting rod of the utility model;

[0021] Figure 5 It is a schematic diagram of the separate structure of the limit block and the second mounting frame of the utility model.

[0022] Description of Reference Numerals

[0023] 1. Wind turbine hub; 2. Wind turbine blades; 3. Hub mounting plate; 4. Blade bolts;

[0024] 5. Positioning assembly; 51. First mounting frame; 52. L-shaped rod; 53. Second mounting frame; 54. Guide tube; 55. Guide bucket; 56. Connecting plate; 57. Limit rod; 58. Limit block; 59. Clamping block; 510. First fastening bolt; 511. Fixing rod; 512. Second fastening bolt. DETAILED DESCRIPTION

[0025] The utility model embodiment provides a wind turbine blade hanging bolt pre-tightening structure.

[0026] See also Figure 1 and Figure 2 , comprising a wind turbine hub 1, the outer surface of the wind turbine hub 1 is provided with three circumferentially arranged wind turbine blades 2, the inner wall of the wind turbine hub 1 is provided with three hub mounting plates 3, the wind turbine blades 2 can be mounted on the hub mounting plates 3, the inner wall of each wind turbine blade 2 is threadedly connected with sixty blade bolts 4, each blade bolt 4 is matched with the hub mounting plate 3, sixty mounting holes matched with the blade bolts 4 are opened on the hub mounting plate 3, and the blade bolts 4 can be mounted on the hub mounting plate 3 through blade nuts.

[0027] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 Twelve positioning components 5 are arranged on the outside of the wind turbine hub 1, and four positioning components 5 correspond to the same wind turbine blade 2, and the four positioning components 5 on the same wind turbine blade 2 are arranged in a circle. The positioning components 5 include a first mounting frame 51, a second mounting frame 53 and a connecting plate 56. The first mounting frame 51 is adapted to the blade bolt 4, and the inner wall of the first mounting frame 51 is provided with anti-slip teeth. The first mounting frame 51 is installed on the blade bolt 4 to prevent the first mounting frame 51 from rotating.

[0028] An L-shaped rod 52 is fixedly connected to a side of the first mounting frame 51 away from the blade bolt 4, and the second mounting frame 53 is adapted to the hub mounting plate 3. The second mounting frame 53 can be mounted on the hub mounting plate 3. A guide tube 54 is fixedly connected to the outer surface of the second mounting frame 53. A guide bucket 55 is fixedly connected to the outer surface of the guide tube 54. The size of the guide bucket 55 will not allow two blade bolts 4 to be inserted into the guide bucket 55 at the same time. The guide tube 54 and the guide bucket 55 are both adapted to the L-shaped rod 52. When hoisting the wind turbine blade 2, the L-shaped rod 52 first contacts the inner wall of the guide bucket 55, and then the L-shaped rod 52 slides into the guide tube 54 under the guiding action of the guide bucket 55.

[0029] A side of the connecting plate 56 close to the hub mounting plate 3 is fixedly connected to a limiting rod 57 , which is matched with the hub mounting plate 3 and can be inserted into the mounting hole of the hub mounting plate 3 , thereby positioning the connecting plate 56 .

[0030] A side of the connecting plate 56 close to the hub mounting plate 3 is fixedly connected to a limiting block 58, which is compatible with the second mounting frame 53. The limiting block 58 can be inserted into the second mounting frame 53, and the second mounting frame 53 is positioned under the connection of the limiting rod 57, the connecting plate 56 and the limiting block 58.

[0031] A clamping block 59 is installed on the outer surface of the first mounting frame 51, and anti-slip teeth are provided on the inner wall of the clamping block 59. The clamping block 59 is installed on the blade bolt 4 to prevent the clamping block 59 from rotating. Two fixing rods 511 are fixedly connected to one side of the first mounting frame 51 close to the clamping block 59. The two fixing rods 511 both penetrate the clamping block 59 and are slidably connected to the clamping block 59. The fixing rods 511 play a guiding role in the movement of the clamping block 59.

[0032] The inner wall of the above-mentioned first mounting frame 51 is threadedly connected with two first fastening bolts 510. The two first fastening bolts 510 both pass through the clamping block 59 and are compatible with the clamping block 59. The clamping block 59 is provided with a reserved hole compatible with the first fastening bolt 510. The first fastening bolt 510 is passed through the reserved hole of the clamping block 59 and then screwed into the first mounting frame 51, so that the clamping block 59 can be installed on the first mounting frame 51.

[0033] The inner wall of the second mounting frame 53 is threadedly connected with a second fastening bolt 512 , which is compatible with the wheel hub mounting plate 3 . The second fastening bolt 512 is tightened into the second mounting frame 53 and supports the wheel hub mounting plate 3 , thereby fixing the second mounting frame 53 on the wheel hub mounting plate 3 .

[0034] When the utility model is used, firstly, the first mounting frame 51 is mounted on the blade bolt 4, ensuring that the L-shaped rod 52 is aligned with the axial direction of the wind turbine blade 2, the clamping block 59 is mounted on the fixing rod 511, and the first fastening bolt 510 passes through the clamping block 59 and is tightened in the first mounting frame 51. At this time, the clamping block 59 and the first mounting frame 51 are fixed on the blade bolt 4, and then the second mounting frame 53 is mounted on the hub mounting plate 3, so that the second mounting frame 53 corresponds to the position of the L-shaped rod 52. , insert the limiting rod 57 into the mounting hole on the hub mounting plate 3, and ensure that the blade bolt 4 installed with the first mounting frame 51 corresponds to the mounting hole of the hub mounting plate 3, and then slowly move the second mounting frame 53 to insert the limiting block 58 into the second mounting frame 53, and then tighten the second fastening bolt 512 to fix the second mounting frame 53 on the hub mounting plate 3, and then pull out the connecting plate 56, the limiting rod 57 and the limiting block 58, and similarly install the remaining three positioning components 5, and then install the fan After the wind turbine hub 1 is installed at a high altitude, the wind turbine blade 2 is hoisted to a high altitude. When the wind turbine blade 2 is aligned with the wind turbine hub 1, the L-shaped rod 52 will first be inserted into the guide bucket 55, and then the wind turbine blade 2 will be continuously moved. Under the guiding action of the guide bucket 55, the L-shaped rod 52 will be inserted into the guide tube 54. At this time, the blade bolt 4 will correspond to the mounting hole of the hub mounting plate 3. The wind turbine blade 2 is continuously moved so that the blade bolt 4 partially enters the mounting hole of the hub mounting plate 3. Then the first mounting frame 51 and the clamping block 59 are removed from the blade bolt 4, and the second mounting frame 53 is removed from the hub mounting plate 3. Then the wind turbine blade 2 is moved so that the blade bolt 4 is completely inserted into the mounting hole of the hub mounting plate 3. Multiple blade bolts 4 can be pre-tightened by blade nuts. The device can quickly align the blade bolt 4 with the mounting hole of the hub mounting plate 3, thereby reducing the time for adjusting the position of the blade bolt 4 at high altitude and improving the installation speed of the wind turbine blade 2.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A wind turbine generator blade mounting bolt pre-tightening structure, comprising a wind turbine generator hub (1), characterized in that: The outer surface of the wind turbine hub (1) is mounted with three wind turbine blades (2) arranged in a circumferential pattern, the inner wall of the wind turbine hub (1) is mounted with three hub mounting plates (3), the inner wall of each wind turbine blade (2) is threadedly connected with sixty blade bolts (4), and each blade bolt (4) is matched with the hub mounting plate (3); Twelve positioning assemblies (5) are arranged outside the wind turbine hub (1), and the positioning assemblies (5) include a first mounting frame (51), a second mounting frame (53) and a connecting plate (56); the first mounting frame (51) is matched with the blade bolt (4); a side of the first mounting frame (51) away from the blade bolt (4) is fixedly connected to an L-shaped rod (52); the second mounting frame (53) is matched with the hub mounting plate (3); the outer surface of the second mounting frame (53) is fixedly connected to a guide tube (54); the outer surface of the guide tube (54) is fixedly connected to a guide bucket (55); the guide tube (54) and the guide bucket (55) are both matched with the L-shaped rod (52).

2. The wind turbine blade hanging bolt pre-tightening structure according to claim 1 is characterized in that: A side surface of the connection plate (56) close to the wheel hub mounting plate (3) is fixedly connected to a limiting rod (57), and the limiting rod (57) is adapted to the wheel hub mounting plate (3).

3. The wind turbine blade mounting bolt pre-tightening structure according to claim 1 is characterized in that: A side surface of the connection plate (56) close to the hub mounting plate (3) is fixedly connected to a limiting block (58), and the limiting block (58) is adapted to the second mounting frame (53).

4. The wind turbine blade hanging bolt pre-tightening structure according to claim 1 is characterized in that: A clamping block (59) is installed on the outer surface of the first mounting frame (51), and two fixing rods (511) are fixedly connected to a side surface of the first mounting frame (51) close to the clamping block (59), and the two fixing rods (511) both penetrate the clamping block (59) and are slidably connected to the clamping block (59).

5. The wind turbine blade mounting bolt pre-tightening structure according to claim 4 is characterized in that: Two first fastening bolts (510) are threadedly connected to the inner wall of the first mounting frame (51), and the two first fastening bolts (510) both penetrate the clamping block (59) and are compatible with the clamping block (59).

6. The wind turbine blade hanging bolt pre-tightening structure according to claim 1 is characterized in that: The inner wall of the second mounting frame (53) is threadedly connected with a second fastening bolt (512), and the second fastening bolt (512) is compatible with the wheel hub mounting plate (3).

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