Auxiliary mounting device for fan blade

Abstract

The utility model relates to an auxiliary installation device for fan blades. The auxiliary installation device comprises a reducer pipe used for being installed on a hub and a telescopic locking pipe used for being installed on the blades. The reducer pipe is provided with a reducer section, and the telescopic locking pipe is provided with a butt joint rod matched with the reducer section. The pipe diameter of the reducing section and the rod diameter of the butt joint rod are gradually increased from one end to the other end; the other end of the reducing section is in butt joint with one end of the butt joint rod; when the variable-diameter section is tightly connected to the butt joint rod in a sleeving mode, the blade bolts on the blades are inserted into the hub screw holes of the hub. Through reasonable structural design and component matching, the problems of shaking and vibration in the blade butt joint process are remarkably solved, and the butt joint accuracy and safety are ensured. The installation efficiency of the blades is improved, manual intervention in the butt joint process is effectively reduced, the danger of high-altitude operation is reduced, and the method is suitable for rapid installation of large-scale offshore wind turbines.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation blade installation, in particular to an auxiliary installation device for wind turbine blades. Background Art

[0002] Wind energy is a renewable, pollution-free, green energy source, and wind power generation is a key approach to addressing global warming and achieving energy transition. After 15 years of development, my country's offshore wind power industry has taken shape, encompassing every step from project planning and turbine component manufacturing and processing, offshore transportation and installation, to post-production operations and maintenance, and accumulating extensive experience. Currently, the biggest challenge facing the offshore wind power industry is reducing costs, as offshore wind turbine installation remains slow and expensive.

[0003] During the current offshore wind turbine installation process, the alignment of the blades with the hub is a key and challenging aspect of the overall installation process, directly impacting the overall progress of the wind turbine installation. The ends of the blades are equipped with multiple blade bolts, and the hub has corresponding locations with multiple hub screw holes. To align the blades with the hub, the blade bolts must be inserted into the corresponding hub screw holes.

[0004] The current method for installing blades on the hub involves first using a crane to hoist the individual blades into position aligned with the hub. Workers at the hub then communicate with the crane operator via radio to adjust the blade position, and then the workers manually adjust the blade bolts. This installation method is not only inefficient but also highly dangerous. Furthermore, due to the length and bulk of offshore wind turbine blades, they can experience significant oscillation and shaking even in ideal weather and light breezes, making it difficult to align the blade bolts with the hub screw holes, slowing blade installation. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an auxiliary installation device for fan blades, which can reduce the shaking and vibration during the blade docking process and improve the accuracy and safety of the docking.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fan blade auxiliary installation device includes a reducing tube for installation on a hub and a telescopic locking tube for installation on a blade;

[0008] The reducing pipe is provided with a reducing section, and the telescopic locking pipe is provided with a docking rod adapted to the reducing section;

[0009] The diameter of the reducing section and the diameter of the connecting rod both gradually increase from one end to the other;

[0010] The other end of the reducing section is connected to one end of the docking rod;

[0011] When the diameter-reducing section is tightly sleeved on the docking rod, the blade bolts on the blade are inserted into the hub screw holes of the hub.

[0012] Furthermore, a locking interface is provided on one side of the diameter-reducing section, and a locking buckle is provided on one side of the docking rod. When the diameter-reducing section is tightly sleeved on the docking rod, the locking buckle is engaged with the locking interface.

[0013] Furthermore, the telescopic locking tube is provided with a telescopic tube section, which is used to further reduce the distance between the hub and the blade by extending and retracting the telescopic tube section.

[0014] Furthermore, a telescopic spring is provided in the telescopic tube section, and both ends of the telescopic spring are respectively in contact with the inner wall of the telescopic tube section.

[0015] Furthermore, there are three reducers and three telescopic locking tubes, which are installed on the hub at intervals of 120 degrees. The three telescopic locking tubes are installed on the blades respectively, and the three reducers and the three telescopic locking tubes are sleeved in a one-to-one correspondence.

[0016] Furthermore, the wheel hub is provided with three straight slot holes, which are arranged at intervals of 120 degrees in pairs, and three reducers are respectively installed in the three straight slot holes in a one-to-one correspondence, and spring tension components are provided between adjacent reducers.

[0017] A fan blade auxiliary installation method includes the following steps:

[0018] Connect the reducer to the hub and the telescopic locking tube to the blade;

[0019] The other end of the diameter reducing section is aligned with one end of the docking rod to form a docking connection. When the diameter reducing section is tightly sleeved on the docking rod, the blade bolt on the blade is inserted into the hub screw hole of the hub.

[0020] Furthermore, after the reducer and the telescopic locking tube are docked, the distance between the hub and the blade is further reduced by the telescopic tube section, so that the blade bolts on the blades penetrate into the hub screw holes of the hub.

[0021] Furthermore, connecting the reducer to the wheel hub includes installing the three reducers in the three straight slot holes of the wheel hub respectively, so that each reducer can adaptively adjust its position in the straight slot hole.

[0022] Furthermore, after the three reducers are correspondingly installed in the three straight slot holes of the wheel hub, the adjacent reducers are connected through a spring tension assembly.

[0023] In general, the utility model has the following advantages:

[0024] This utility model provides an auxiliary installation device for offshore wind turbine blades. Through rational structural design and component coordination, it significantly reduces the shaking and vibration problems during blade docking, ensuring docking accuracy and safety. This not only improves blade installation efficiency but also effectively reduces manual intervention during docking, lowering the risk of high-altitude operations, making it suitable for the rapid installation of large-scale offshore wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the reducer structure of this embodiment;

[0026] Figure 2 Schematic diagram of the structure of the telescopic locking tube;

[0027] Figure 3 An exploded view of the telescopic locking tube;

[0028] Figure 4 A schematic diagram of the structure of the main support rod;

[0029] Figure 5 Schematic diagram of the structure of the spring tension component;

[0030] Figure 6 for Figure 5 A in the middle is an enlarged schematic diagram;

[0031] Figure 7 This is a schematic diagram of the installation position of the reducer and spring tension assembly on the wheel hub;

[0032] Figure 8 for Figure 7 The enlarged schematic diagram of point B in the middle;

[0033] Figure 9 This is a schematic diagram of the installation position of the telescopic locking tube and the blade;

[0034] Figure 10 for Figure 9 Enlarged schematic diagram at point C in the middle.

[0035] In the picture:

[0036] 1- Fastening nut; 2- Fixed seat ring; 3- First flange; 4- Reinforcement rib; 5- Buffer pipe section; 6- Locking interface; 7- Reducer section; 8- Rubber interface; 9- Wire rope connecting ring; 10- Locking buckle; 11- Docking rod; 12- Telescopic pipe section; 13- Support rod connecting seat; 14- Telescopic spring; 15- Main support rod; 16- Second flange; 17- Wire rope; 18- Tension spring; 19- Wire rope joint; 20- Hub; 21- Hub screw hole; 22- Straight slot hole; 23- Blade; 24- Blade bolt. DETAILED DESCRIPTION

[0037] The utility model will be described in further detail below.

[0038] A fan blade auxiliary installation device includes a reducing tube, a telescopic locking tube, a main support rod 15, a spring tension component, etc.

[0039] like Figure 1 As shown, the reducer includes a fastening nut 1, a fixed seat ring, a first flange 3, a reinforcing rib 4, a buffer pipe section 5, a locking interface 6, a reducer section 7, a rubber interface 8, and a wire rope connecting ring 9.

[0040] One end of the reducer is provided with a fastening nut 1 and a fixed seat ring 2 for fixed connection with the hub 20. The fixed seat ring 2 is tightly combined with the hub 20 by fastening bolts. The hub 20 is provided with a straight slot for cooperating with the reducer for movement to avoid interference between devices due to manufacturing, weather or temperature reasons. The diameter of the fastening bolt is larger than the fixed seat ring 2. If the auxiliary installation device interferes during docking, the fastening bolt can be tightened to a loose state. When the device is automatically adjusted, the fastening bolt and the fixed seat ring 2 can be locked to ensure stable installation of the device and the fan hub 20.

[0041] Reinforcing ribs 4 are provided between the first flange 3 and the buffer tube section 5. The inner wall of the buffer tube is provided with a rubber lining, and the inner surface of the reducer section 7 is coated with a friction-reducing material. The fastening nut 1 consists of a hexagonal nut with a disc on the end. The disc increases the contact area, ensuring a more stable fixation of the reducer within the straight slot 22. The structure of the buffer tube section 5 and the reducer section 7 absorbs impact forces caused by shaking or vibration during the docking of the blades 23, improving installation accuracy and ensuring stable and safe installation. The buffer tube section 5 of the reducer is a hollow tube designed to absorb vibrations caused by external factors (such as wind and shaking) during the docking of the blades 23. It is equipped with a coaxiality measuring instrument to detect the coaxiality between the blades 23 and the hub 20.

[0042] The telescopic locking tube's docking rod 11 houses a displacement sensor. A coaxiality measuring instrument and displacement sensor are connected to a radio signal module via a cable, and data is transmitted via radio to the lifting console. During the installation of blade 23, the coaxiality measuring instrument and displacement sensor continuously monitor the relative position and displacement of blade 23. If any coaxiality deviation or abnormal advance distance is detected, the system automatically issues an alarm and suspends the advance operation.

[0043] The diameter-reducing section 7 is an opening structure with a large diameter, which is used to further accommodate and guide the positioning of the fan blades 23. A rubber interface 8 is installed at the end to cushion possible impacts.

[0044] like Figure 2 and Figure 3As shown, the telescopic locking tube includes a locking buckle 10, a docking rod 11, a telescopic tube section 12, a support rod connector 13, and a telescopic spring 14. The outer surfaces of the docking rod 11 and telescopic tube section 12 may be coated with a friction-reducing material, such as polytetrafluoroethylene (PTFE). The end of the support rod connector 13 has a threaded hole. A telescopic spring 14 is installed within the telescopic tube section 12, secured by a boss within the support rod connector 13 and connected to the end of the docking rod 11. The bottom of the locking tab is connected to the docking rod 11 via the telescopic spring 14. The telescopic locking tube mates with the reducer via the locking tab, and a spring-loaded automatic locking mechanism automatically achieves precise positioning and quick locking of the blades 23 when docked.

[0045] The telescopic spring 14 acts on the entire connection system, not only to cushion the impact force when the blade 23 shakes, further improve the docking stability, and ensure the safety of the connection components, but also when the docking rod 11 is fully docked with the reducer, the telescopic spring 14 can be contracted, so that the blade 23 can continue to move toward the hub 20, making it convenient for the blade bolt 24 to be fully inserted into the hub screw hole 21. After the installation is completed, the telescopic locking tube can automatically restore its shape. The telescopic spring 14 remains in the telescopic locking tube to prevent the structure from loosening.

[0046] The inner wall of the buffer pipe section 5 is provided with a rubber lining to further reduce the vibration generated when the fan blades 23 are docked; the surface of the reducer and the docking rod 11 are coated with anti-friction material to reduce friction and improve docking efficiency.

[0047] like Figure 4 As shown, the front end of the main support rod 15 has an opening for bolting with the support rod connecting seat 13, and the end of the main support rod 15 can be connected to the blade 23 by bolts. The setting of the main support rod 15 can reduce the length of the auxiliary installation device and reduce the difficulty of installation.

[0048] like Figure 5 、 Figure 6 As shown, the spring tension assembly is used to keep the various components tightly positioned during the propulsion of the blade 23 and reduce the swing amplitude of the blade 23. The spring tension assembly includes a tension spring 18 and a wire rope 17 connected to each end of the tension spring 18. The wire rope 17 can be inserted into a wire rope connector 19 of the reducer. The wire rope connector 19 is provided with a connecting bolt, which can be tightened to secure the wire rope 17 and the tension spring 18 to the wire rope connector 19. The spring tension assembly ensures that the reducer and the telescopic locking tube are tightly positioned to prevent excessive movement, and also allows the position changes of the various reducers to proceed synchronously. Once the docking rod 11 is tightly fitted with the reducing section 7 of the reducer, the fastening nut 1 can be tightened to secure the position of the reducer.

[0049] A fan blade auxiliary installation method includes the following steps:

[0050] Step 1: Arrange the three reducers at intervals of 120°, insert them into the straight slot holes 22 of the hub 20 through the fixed seat ring 2, and connect them to the hub 20 through the fastening bolts. At the same time, install the spring tension assembly in three parts on the wire rope connecting ring 9 of the reducer; similarly, divide the main support rod 15 into three parts at intervals of 120°, and connect them to the blade 23 through the second flange 16 to ensure that the relative position of the main support rod 15 and the reducer is accurate.

[0051] Step 2: Before the blades 23 are docked, fix the telescopic locking tube to the connection of the main support rod 15 and tighten it with bolts to ensure that the telescopic locking tube is fixed and will not shake or move.

[0052] Step 3: When the blades are docked, first dock the docking rod 11 with the front end position of the reducer. After confirming that the docking joint can enter the reducer, move the blade 23 forward. When the front end of the docking joint enters the buffer pipe section 5, the locking buckle 10 is automatically locked. At this time, the middle-end reducing part of the docking rod 11 is also tightly fitted with the large reducing part of the reducer. If there is interference during the installation process, the reducer will correct itself in the straight slot hole 22, and the spring tension component will ensure that the position between the reducer and the telescopic locking tube is compact and will not move too much. When the middle-end reducing part of the connecting rod is also tightly fitted with the large reducing part of the reducer, the locking nut can be tightened to fix the position of the reducer.

[0053] Step 4: After step 3 is completed, the distance between the blade bolt 24 and the hub screw hole 21 should be very short, and the bolt and the hub 20 should be in their respective corresponding positions. After checking that everything is correct, the blade 23 can continue to move forward. When the blade bolt 24 enters the hub screw hole 21, the telescopic tube section 12 of the telescopic locking tube is telescoped, and the telescopic length is equal to the entry length of the blade bolt 24. At this time, the docking is completed.

[0054] like Figure 7 and Figure 8 As shown, the hub 20 is provided with three straight slot holes 22, the extension lines of which intersect at the center of the hub 20. Before the blades 23 are installed, the reducer is first installed in the straight slot hole 22 of the hub 20 by means of bolts. The reducer moves in the straight slot hole 22, but the degree of freedom remains unaffected, thus achieving adaptive adjustment. The fastening nut 1 is on the inside of the hub 20, and the reducer is on the outside of the hub 20. Three straight slot holes 22 and three reducers are provided, each installed at a spacing of 120 degrees. The spring tension assembly is connected to the wire rope connecting ring 9 at the lower end of the reducer. Each reducer is connected to two sets of spring tension assemblies, which are connected at a 60° angle. The three sets of spring tension assemblies connect the three reducers into an equilateral triangle, which can be calibrated synchronously. After the calibration is completed, the reducer can be locked with a locking nut.

[0055] like Figure 9 and Figure 10 As shown, first install the main support rod 15 at the corresponding position on the inner side of the blade 23 with bolts, then install the telescopic locking tube on the main support rod 15 through the support rod connecting seat 13, and then lock it with bolts. Before installation, first position it to ensure that the docking rod 11 of the telescopic locking tube is coaxial with the reducer.

[0056] The docking rod 11 is first docked with the reducing section 7. The blade 23 may shake during the forward movement, but the docking rod 11 and the reducing section 7 are both gradually shrinking conical structures. When the docking rod 11 slides along the middle of the reducing section 7, automatic centering will be achieved. When the front end of the docking rod 11 enters the locking interface 6, the locking interface 6 and the front end of the docking rod 11 retract into the locking buckle 10 for locking.

[0057] Furthermore, after the reducer and telescopic locking tube are docked, the telescopic tube section 12 further reduces the distance between the hub 20 and the blade 23 by extending and retracting, allowing the blade bolt 24 on the blade 23 to penetrate deeply into the hub screw hole 21 of the hub 20. Specifically, after the locking clips 10 and the locking interface 6 at all three locations are locked, the docking rod 11 is also tightly fitted with the reducer section 7. At this point, the docking rod 11 cannot move forward and its position is locked, effectively limiting the swing of the blade 23. The position of the blade 23 is fixed, and the blade bolt 24 is aligned with the corresponding position of the hub screw hole 21. At this time, the docking rod 11 and telescopic tube section 12 can be retracted. The extension length is the length by which the blade bolt 24 enters the hub 20. The blade 23 can then be pushed forward to push the connecting bolt into the hub screw hole 21, and the blade 23 is installed. After the final docking is completed, the telescopic tube section 12 of the telescopic locking tube automatically resets, ensuring that the docking device returns to its original state.

[0058] The device of the utility model can significantly reduce the need for manual intervention during the installation of the blades 23, improve installation efficiency, reduce the risks caused by high-altitude operations, is suitable for the rapid installation of large-scale offshore wind turbines, and has good economic benefits and application prospects.

[0059] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A fan blade auxiliary installation device, characterized by: including a reducer for mounting to the hub and a telescopic locking tube for mounting to the blade; The reducing pipe is provided with a reducing section, and the telescopic locking pipe is provided with a docking rod adapted to the reducing section; The diameter of the reducing section and the diameter of the connecting rod both gradually increase from one end to the other; The other end of the reducing section is connected to one end of the docking rod; When the diameter-reducing section is tightly sleeved on the docking rod, the blade bolts on the blade are inserted into the hub screw holes of the hub.

2. The fan blade auxiliary installation device according to claim 1, characterized in that: A locking interface is provided on one side of the reducing section, and a locking buckle is provided on one side of the docking rod. When the reducing section is tightly sleeved on the docking rod, the locking buckle is clamped on the locking interface.

3. The fan blade auxiliary installation device according to claim 1, characterized in that: The telescopic locking tube is provided with a telescopic tube section, which is used to further reduce the distance between the hub and the blade by extending and retracting the telescopic tube section.

4. The fan blade auxiliary installation device according to claim 3, characterized in that: A telescopic spring is arranged in the telescopic pipe section, and two ends of the telescopic spring are respectively in contact with the inner wall of the telescopic pipe section.

5. The fan blade auxiliary installation device according to claim 1, characterized in that: There are three reducers and three telescopic locking tubes, which are installed on the hub at intervals of 120 degrees. The three telescopic locking tubes are installed on the blades respectively, and the three reducers and the three telescopic locking tubes are sleeved one by one.

6. The fan blade auxiliary installation device according to claim 5, characterized in that: The wheel hub is provided with three straight slot holes, which are arranged 120 degrees apart in pairs. Three reducers are respectively installed in the three straight slot holes in a one-to-one correspondence, and spring tension components are provided between adjacent reducers.

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