Auxiliary mounting device and method for fan blades

Abstract

The invention relates to an auxiliary installation device and method for fan blades. The auxiliary installation device for the fan blades 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 present invention relates to the technical field of wind power generation blade installation, and in particular to a wind turbine blade auxiliary installation device and method. Background Art

[0002] Wind energy is a renewable, pollution-free green energy source, and wind power generation is one of the important ways to cope with global warming and achieve energy transformation. my country's offshore wind power industry has taken shape, covering all aspects from early project planning, wind turbine component manufacturing and processing, offshore transportation and installation, to later operation and maintenance, and has accumulated rich experience. At present, the biggest challenge facing the offshore wind power industry is how to reduce costs, and offshore wind turbine installation still has problems such as slow speed and high cost.

[0003] At present, during the installation of offshore wind turbines, the docking of wind turbine blades and hubs is the key and difficult point in the overall installation of offshore wind turbines, which directly affects the overall progress of the overall installation of the wind turbine. There are multiple blade bolts at the end of the wind turbine blades, and multiple hub screw holes are provided at the corresponding positions of the hub. When the wind turbine blades are docked with the hub, the multiple blade bolts need to be inserted into the multiple hub screw holes one by one.

[0004] The current method of docking and installing blades and hubs is to first use a crane to hoist a single blade to the appropriate position that matches the hub, then the worker at the hub and the crane operator use a radio to adjust the blade position, and then the worker manually adjusts the blade bolt position. This installation method is not only inefficient, but also highly dangerous. In addition, due to the long length and large size of offshore wind turbine blades, there will still be a lot of swing and shaking problems even in ideal weather and light wind conditions, making it difficult to dock the blade bolts with the hub screw holes, and the blade installation progress is slow. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a fan blade auxiliary installation device and method, 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 object, the present invention adopts the following technical solution: A fan blade auxiliary installation device comprises a reducer for installation on a hub and a telescopic locking tube for installation on a blade; The reducer is provided with a reducer section, and the telescopic locking tube is provided with a docking rod adapted to the reducer section; The diameter of the pipe of the reducing section and the diameter of the butt rod both gradually increase from one end to the other end; 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.

[0007] 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 clamped on the locking interface.

[0008] Furthermore, the telescopic locking tube is provided with a telescopic tube section for further reducing the distance between the hub and the blade by extending and retracting the telescopic tube section.

[0009] Furthermore, a telescopic spring is provided 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.

[0010] 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 one by one.

[0011] Furthermore, the wheel hub is provided with three straight slot holes, which are arranged 120 degrees apart 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.

[0012] A fan blade auxiliary installation method comprises the following steps: Connect the reducer to the hub and the telescopic locking tube to the blade; 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 bolts on the blade are inserted into the hub screw holes of the hub.

[0013] Furthermore, after the reducer and the telescopic locking tube are butt-jointed, 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.

[0014] Further, connecting the reducer to the wheel hub includes installing three reducers in three straight slot holes of the wheel hub respectively and correspondingly, so that each reducer can adaptively adjust its position in the straight slot hole.

[0015] Furthermore, after the three reducers are respectively installed in the three straight slot holes of the wheel hub, the adjacent reducers are connected through the spring tension assembly.

[0016] In general, the present invention has the following advantages: The offshore wind turbine blade auxiliary installation device and method provided by the present invention significantly reduces the shaking and vibration problems during the blade docking process through reasonable structural design and component matching, ensuring the accuracy and safety of docking. It not only improves the installation efficiency of the blades, but also effectively reduces manual intervention during the docking process, reduces the danger of high-altitude operations, and is suitable for the rapid installation of large-scale offshore wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the reducer structure of this embodiment; Figure 2 It is a schematic diagram of the structure of the telescopic locking tube; Figure 3 An exploded view of a telescopic locking tube; Figure 4 A schematic diagram of the structure of the main support rod; Figure 5 It is a structural schematic diagram of a spring tension component; Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 It is a schematic diagram of the installation position of the reducer and the spring tension assembly on the wheel hub; Figure 8 for Figure 7 The enlarged schematic diagram of point B in the middle; Fig. 9 It is a schematic diagram of the installation position of the telescopic locking tube and the blade; Fig.10 for Fig. 9 Enlarged schematic diagram at point C in the middle.

[0018] In the figure: 1-fastening nut; 2-fixing seat ring; 3-first flange; 4-reinforcement rib; 5-buffer pipe section; 6-locking interface; 7-reducing 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

[0019] The present invention will be described in further detail below.

[0020] A fan blade auxiliary installation device comprises a reducing tube, a telescopic locking tube, a main support rod 15, a spring tension component and the like.

[0021] 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.

[0022] One end of the reducer is provided with a fastening nut 1 and a fixed seat ring 2 for fixed connection with the wheel hub 20. The fixed seat ring 2 is tightly combined with the wheel hub 20 by fastening bolts. The wheel 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. 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.

[0023] A reinforcing rib 4 is provided between the first flange 3 and the buffer pipe section 5, a rubber lining is provided on the inner wall of the buffer pipe, the inner surface of the reducer section 7 is coated with a friction-reducing material, and the fastening nut 1 is a hexagonal nut with a disc at the end, the function of the disc is to increase the contact area, so that the reducer is fixed in the straight slot hole 22 more stably. The structure of the buffer pipe section 5 and the reducer section 7 can absorb the impact force caused by shaking or vibration during the docking of the blades 23, improve the installation accuracy, and ensure the stability and safety of the installation. The buffer pipe section 5 of the reducer is a hollow tube, which is used to absorb the vibration caused by external factors (such as wind force, shaking) during the docking of the blades 23. It is equipped with a coaxiality measuring instrument for detecting the coaxiality state between the blades 23 and the hub 20.

[0024] There is a displacement sensor inside the docking rod 11 of the telescopic locking tube. The coaxiality measuring instrument and the displacement sensor are connected to the radio signal module through a cable, and the data is transmitted to the lifting operation table via radio. During the installation process of the blade 23, the coaxiality measuring instrument and the displacement sensor continuously monitor the relative position and displacement state of the blade 23. If a coaxiality deviation or an abnormal advancement distance is found, the system automatically issues an alarm and suspends the advancement operation.

[0025] 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 buffer possible impacts.

[0026] like Figure 2 and Figure 3 As shown, the telescopic locking tube includes a locking buckle 10, a docking rod 11, a telescopic tube section 12, a support rod connecting seat 13, and a telescopic spring 14. The outer surfaces of the docking rod 11 and the telescopic tube section 12 can be coated with anti-friction materials, such as polytetrafluoroethylene (PTFE); a threaded hole is provided at the end of the support rod connecting seat 13. A telescopic spring 14 is installed inside the telescopic tube section 12, which is fixed by a boss inside the support rod connecting seat 13 and connected to the tail end of the docking rod 11. The bottom of the locking bayonet is connected to the docking rod 11 through the telescopic spring 14. The telescopic locking tube cooperates with the reducer through the locking bayonet, and can automatically achieve accurate positioning and rapid locking when the blade 23 is docked through a spring-loaded automatic locking structure.

[0027] The telescopic spring 14 acts on the entire connection system, not only to buffer the impact force when the blade 23 shakes, but also to further improve the docking stability and ensure the safety of the connection components. Moreover, 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 is retained in the telescopic locking tube to prevent the structure from loosening.

[0028] 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 is coated with anti-friction material to reduce friction and improve docking efficiency.

[0029] 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 arrangement of the main support rod 15 can reduce the length of the auxiliary installation device and reduce the difficulty of installation.

[0030] like Figure 5 , Figure 6 As shown, the spring tension assembly is used to keep the positions of various components compact during the advancement of the blade 23 and reduce the swing amplitude of the blade 23. It includes a tension spring 18 and a wire rope 17 respectively connected to the two ends of the tension spring 18. The wire rope 17 can be inserted into the wire rope joint 19 of the reducer. The wire rope joint 19 is provided with a connecting bolt. The wire rope 17 can be fixed by tightening the connecting bolt. The tension spring 18 is connected to the wire rope joint 19. The spring tension assembly ensures that the reducer and the telescopic locking tube are compactly positioned and will not move too much. It can also synchronize the position changes of various reducers. When the docking rod 11 and the reducer section 7 of the reducer are tightly fitted, the fastening nut 1 can be locked to fix the position of the reducer.

[0031] A fan blade auxiliary installation method comprises the following steps: Step 1: Arrange three reducers at an interval of 120°, insert them into the straight slot hole 22 of the hub 20 through the fixed seat ring 2, connect them to the hub 20 through the fastening bolts, and 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 an interval of 120°, and connect them to the blade 23 through the second flange 16 to ensure the relative position of the main support rod 15 and the reducer is accurate.

[0032] 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 has been fixed without any shaking or displacement.

[0033] Step three: 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 of the docking rod 11 also fits tightly with the large diameter 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 of the connecting rod also fits tightly with the large diameter part of the reducer, the locking nut can be tightened to fix the position of the reducer.

[0034] Step 4: After step 3 is completed, the distance between the blade bolt 24 and the wheel hub screw hole 21 should be very short, and the bolt and the wheel 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 wheel 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.

[0035] like Figure 7 and Figure 8 As shown, the hub 20 is provided with three straight slot holes 22, and the extension lines of the straight slot holes 22 intersect at the center of the hub 20. Before the blade 23 is installed, the reducer is first installed in the straight slot hole 22 of the hub 20 by bolts. The reducer moves in the straight slot hole 22, but the degree of freedom is still not affected, so that adaptive adjustment is achieved. The fastening nut 1 is on the inner side of the hub 20, and the reducer is on the outer side of the hub 20. Three straight slot holes 22 and reducers are respectively provided, and each is 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 with two groups of spring tension assemblies, and the two groups of spring tension assemblies are connected at an angle of 60°. The three groups of spring tension assemblies connect the three reducers into an equilateral triangle, which can be corrected synchronously. After the correction is completed, it can be locked with a locking nut.

[0036] like Fig. 9 and Fig.10 As shown, the main support rod 15 is first installed at the corresponding position on the inner side of the blade 23 by bolts, and then the telescopic locking tube is installed on the main support rod 15 through the support rod connecting seat 13, and then locked with bolts. Before installation, positioning is first performed to ensure that the docking rod 11 of the telescopic locking tube is coaxial with the reducer.

[0037] 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.

[0038] Furthermore, after the reducer and the telescopic locking tube are docked, the distance between the hub 20 and the blade 23 is further reduced by the telescopic tube section 12, so that the blade bolt 24 on the blade 23 penetrates into the hub screw hole 21 of the hub 20. Specifically, after the locking buckles 10 and the locking interface 6 at the three positions are locked, the docking rod 11 is also tightly fitted with the reducer section 7. At this time, the docking rod 11 cannot move forward, and the position has been locked, which can effectively limit the swing of the blade 23. The position of the blade 23 has been fixed, and the blade bolt 24 has been aligned with the corresponding position of the hub screw hole 21. At this time, the docking rod 11 and the telescopic tube section 12 can be retracted, and the telescopic length is the length of the blade bolt 24 entering the hub 20. The blade 23 can be pushed forward again to push the connecting bolt into the hub screw hole 21, and the installation of the blade 23 is completed. After the final docking is completed, the telescopic tube section 12 of the telescopic locking tube automatically resets to ensure that the docking device returns to its original state.

[0039] The device of the present invention can significantly reduce the need for manual intervention during the installation of the blades 23, improve installation efficiency, and reduce the risks caused by high-altitude operations. It is suitable for the rapid installation of large-scale offshore wind turbines and has good economic benefits and application prospects.

[0040] The above embodiments are preferred implementation modes of the present invention, but the implementation modes 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 equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A fan blade auxiliary installation device, characterized in that: including a reducer tube for mounting to a hub and a telescopic locking tube for mounting to a blade; The reducer is provided with a reducer section, and the telescopic locking tube is provided with a docking rod adapted to the reducer section; The diameter of the pipe of the reducing section and the diameter of the butt rod both gradually increase from one end to the other end; 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. A 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. A 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, 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.

7. A fan blade auxiliary installation method, characterized in that: The fan blade auxiliary installation device according to any one of claims 1 to 6 is adopted, The following steps are included: Connect the reducer to the hub and the telescopic locking tube to the blade; 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 bolts on the blade are inserted into the hub screw holes of the hub.

8. The fan blade auxiliary installation method according to claim 7, characterized in that: When the reducer and the telescopic locking tube are butted against each other, 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.

9. The fan blade auxiliary installation method according to claim 7, characterized in that: Connecting the reducer to the wheel hub includes installing three reducers in three straight slot holes of the wheel hub respectively and correspondingly, so that each reducer can adjust its position in the straight slot hole adaptively.

10. The fan blade auxiliary installation method according to claim 9, characterized in that: After the three reducers are respectively installed in the three straight slot holes of the wheel hub, the adjacent reducers are connected through the spring tension assembly.

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