Improved hub of horizontal-axis wind turbine
By setting a hollow part and multiple sets of air blade mounting parts on the hub of the horizontal axis wind turbine, combined with magnet blocks and auxiliary fixing structure, the problems of large hub weight and loose air blades are solved, and higher wind energy utilization and safe wind speed are achieved.
Patent Information
- Application Number
- CN202422137090.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Due to the heavy overall weight of the existing horizontal shaft wind turbine hub, the wind turbine has low wind energy utilization rate at low wind speeds. At the same time, due to the simple process, the fixed connection between the wind blades and the hub depends on bolts, which is easy to loosen during long-term operation, causing the wind blades or the hub to fall off.
An improved horizontal shaft wind turbine hub is designed, which reduces weight and improves aesthetics by setting a hollow part and a hollow groove on the hub body; at the same time, multiple sets of air blade installation parts and magnet blocks are used for adsorption and positioning of air blades, and the stability of air blades is ensured through the auxiliary fixing structure of arc-shaped positioning blocks and return springs.
The weight of the wheel hub is reduced through the hollow design and the wind energy utilization rate is improved; at the same time, the multi-layer protection design effectively prevents the wind blade from loosening, improving the safe wind speed of the wind turbine.
Smart Images
Figure CN222976948U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wind turbines, and particularly relates to an improved horizontal-axis wind turbine hub. Background Art
[0002] With the continuous improvement of the owners' requirements and the limitation of wind resources, the single-unit capacity of wind turbines is increasing continuously, the diameter of the wind wheel is getting larger and larger, and the load of the wind turbines is also increasing accordingly. Therefore, higher requirements are put forward for the hub design. The hub is used to connect the blades and the main shaft in a wind turbine generator set and is an important component for transmitting force in the wind turbine generator set. The quality of the hub design directly affects the service life of the pitch bearing and whether the wind turbine generator set can operate normally, which plays a crucial role in the reliability of the wind turbine generator set.
[0003] The traditional S / M type horizontal-axis wind turbine hub on the market is made by welding cast iron or carbon steel plates with 45# round steel. Thread holes for installing the wind blades are processed on the surface of the carbon steel plate, and thread holes for fixing the main shaft are processed in the center of the round steel. The overall process is very simple. The disadvantages brought by such a processed and manufactured hub are as follows: Since the overall weight of the hub is relatively heavy, the starting torque required for the wind turbine increases accordingly, and the wind energy utilization rate is low under low wind speed conditions; secondly, due to the simplicity of the process, the fixed connection between the wind blade and the hub and the fixed connection between the main shaft and the hub only rely on the fastening of bolts and nuts. During the long-term operation of the wind turbine, the bolts are prone to loosen. Especially in areas with severe weather such as many strong typhoons, due to the centrifugal force of the wind blades, the loosening of the bolts is more serious, resulting in the situation of the wind blade falling off or the hub falling off. For this reason, we propose an improved horizontal-axis wind turbine hub. Content of the Utility Model
[0004] The purpose of the utility model is to provide an improved horizontal-axis wind turbine hub to solve the problems raised in the above background art, namely, since the overall weight of the hub is relatively heavy, the starting torque required for the wind turbine increases accordingly, and the wind energy utilization rate is low under low wind speed conditions; secondly, due to the simplicity of the process, the fixed connection between the wind blade and the hub and the fixed connection between the main shaft and the hub only rely on the fastening of bolts and nuts. During the long-term operation of the wind turbine, the bolts are prone to loosen, resulting in the situation of the wind blade falling off or the hub falling off.
[0005] To achieve the above purpose, the utility model provides the following technical solution: An improved horizontal-axis wind turbine hub, including a hub body. A plurality of groups of blade mounting parts are evenly arranged on the hub body in a ring shape. A hollow part is arranged on the hub body between the plurality of groups of blade mounting parts. A main shaft mounting port is arranged in the middle of the hub body. A main shaft nut groove is arranged on the hub body outside the main shaft mounting port.
[0006] Among them, cylindrical bosses and conical bosses corresponding to the grooves on the wind blades are respectively arranged on the wind blade mounting part. A first bolt mounting opening is arranged on the wind blade mounting part inside the cylindrical boss, and a second bolt mounting opening is arranged on the wind blade mounting part inside the conical boss. A first wind blade nut groove and a second wind blade nut groove corresponding to the first bolt mounting opening and the second bolt mounting opening are further arranged on the back of the wind blade mounting part.
[0007] Preferably, multiple groups of hollow grooves are further arranged on the back of the wind blade mounting part, which can reduce the weight of the hub body.
[0008] Preferably, a wind cap mounting notch is further arranged at the edge of the back of the hub body, which is convenient for the positioning and installation of the wind turbine wind cap.
[0009] Preferably, a first magnet block is inlaid on the outer surface of the cylindrical boss, and a second magnet block is inlaid on the outer surface of the conical boss, which can adsorb and position the wind blade and is convenient for the quick installation of the wind blade.
[0010] Preferably, auxiliary fixing structures for positioning the wind blade lock nut are arranged in both the first wind blade nut groove and the second wind blade nut groove.
[0011] Preferably, the auxiliary fixing structure includes an arc-shaped positioning block. The arc-shaped positioning block is movably arranged in a receiving groove. The receiving groove is arranged in the first wind blade nut groove and the second wind blade nut groove. A return spring is further arranged in the receiving groove. One end of the return spring is connected to the arc-shaped positioning block, which can clamp the wind blade lock nut, further improving the stability of the wind blade lock nut and preventing it from loosening.
[0012] Preferably, limiting sliders are symmetrically arranged on both sides of the arc-shaped positioning block. One end of the limiting slider is slidably arranged in a limiting chute. The limiting chutes are symmetrically arranged on both sides inside the receiving groove, improving the guiding property when the arc-shaped positioning block moves.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] (1) Through the arrangement of the hollow part and the hollow groove, the present utility model reduces the weight of the hub while having an aesthetic effect.
[0015] (2) After the wind blade lock nut is installed, it cannot rotate, playing a dual protection role to prevent the wind blade from loosening. At the same time, when the hub body is installed, it fits tightly with the installation groove at the bottom of the wind blade. This design can effectively offset the centrifugal force of the wind blade during the operation of the wind turbine, directly improving the safety wind speed of the wind turbine. Description of the Drawings
[0016] Figure 1Schematic front view structure diagram of the present utility model;
[0017] Figure 2 Schematic rear view structure diagram of the present utility model;
[0018] Figure 3 Schematic left view structure diagram of the present utility model;
[0019] Figure 4 Schematic semi-sectional view structure diagram of the cylindrical boss in the present utility model;
[0020] Figure 5 Schematic semi-sectional view structure diagram of the conical boss in the present utility model;
[0021] Figure 6 Schematic rear view structure diagram of the auxiliary fixing structure in the present utility model;
[0022] Figure 7 is Figure 6 Schematic enlarged structure diagram of part A in
[0023] In the figure: 1, hollow part; 2, main shaft nut groove; 3, main shaft installation opening; 4, hub body; 5, first bolt installation opening; 6, second bolt installation opening; 7, wind blade installation part; 8, conical boss; 9, cylindrical boss; 10, wind cap installation notch; 11, hollow groove; 12, first wind blade nut groove; 13, second wind blade nut groove; 14, first magnet block; 15, second magnet block; 131, arc positioning block; 132, storage groove; 133, return spring; 134, limit sliding groove; 135, limit sliding block. Detailed implementation manners
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0025] Please refer to Figure 1 - Figure 2, the present utility model provides a technical solution: an improved horizontal axis wind turbine hub, including a hub body 4. A plurality of blade mounting parts 7 are evenly arranged in a ring on the hub body 4. A hollow part 1 is arranged on the hub body 4 between the plurality of blade mounting parts 7. A plurality of hollow grooves 11 are also arranged on the back of the blade mounting part 7. Through the hollow setting, the weight of the hub body 4 can be reduced, and at the same time, the aesthetics is improved. A main shaft mounting port 3 is arranged in the middle of the hub body 4. A main shaft nut groove 2 is arranged on the hub body 4 outside the main shaft mounting port 3. The main shaft nut groove 2 is regular hexagon. When the wind turbine main shaft is installed in the main shaft mounting port 3, the main shaft is fixed by a main shaft locknut. At the same time, the main shaft locknut is installed in the main shaft nut groove 2. The main shaft locknut itself has a locknut function. Coupled with the main shaft nut groove 2, the main shaft locknut cannot rotate after installation. At the same time, below the main shaft nut groove 2 is the threaded mounting hole of the main shaft, replacing the traditional through-hole design. Even if the locknut falls off, the main shaft and the hub can still be firmly connected, with its triple protection function.
[0026] Please refer to Figure 3 , Figure 4 , Figure 5 , cylindrical bosses 9 and conical bosses 8 corresponding to the grooves on the blades are respectively arranged on the blade mounting parts 7. When the hub body 4 is installed, the mounting grooves at the bottom of the blades are closely attached to the cylindrical bosses 9 and the conical bosses 8. This design can effectively offset the centrifugal force of the blades when the wind turbine is running, directly improving the safety wind speed of the wind turbine.
[0027] A first bolt mounting port 5 is arranged on the blade mounting part 7 inside the cylindrical boss 9. A second bolt mounting port 6 is arranged on the blade mounting part 7 inside the conical boss 8. First blade nut grooves 12 and second blade nut grooves 13 corresponding to the first bolt mounting port 5 and the second bolt mounting port 6 are also arranged on the back of the blade mounting part 7. When the blade is positioned on the blade mounting part 7, the first blade bolt and the second blade bolt pass through the first bolt mounting port 5 and the second bolt mounting port 6, and the first blade bolt and the second blade bolt are fixed by a first blade locknut and a second blade locknut. At this time, the first blade locknut and the second blade locknut are installed in the first blade nut grooves 12 and the second blade nut grooves 13. The first blade locknut and the second blade locknut cannot rotate after installation, playing a double protection role.
[0028] A wind cap mounting notch 10 is also arranged at the edge of the back of the hub body 4. When installing the wind cap, only need to snap the edge of the wind cap into the hub notch, saving the commonly used wind cap bolts and being convenient for installation.
[0029] Further, a first magnet block 14 is inlaid on the outer surface of the cylindrical boss 9, and a second magnet block 15 is inlaid on the outer surface of the conical boss 8, which can adsorb and position the wind blade, facilitating the rapid installation of the wind blade.
[0030] As a specific embodiment of the present application, please refer to FIGS. 6 and Figure 7 , an auxiliary fixing structure for positioning the anti-loosening nut of the wind blade is provided in both the first wind blade nut groove 12 and the second wind blade nut groove 13. The auxiliary fixing structure includes an arc-shaped positioning block 131, and the arc-shaped positioning block 131 is movably arranged in the receiving groove 132. The receiving groove 132 is arranged in the first wind blade nut groove 12 and the second wind blade nut groove 13. A return spring 133 is further arranged in the receiving groove 132. One end of the return spring 133 is connected to the arc-shaped positioning block 131, which can clamp the anti-loosening nut of the wind blade, further improving the stability of the anti-loosening nut of the wind blade and avoiding the occurrence of loosening.
[0031] When installing the first wind blade anti-loosening nut and the second wind blade anti-loosening nut, the arc-shaped positioning block 131 is squeezed, and the arc-shaped positioning block 131 moves in the receiving groove 132. The arc-shaped positioning block 131 moves to compress the return spring 133. Under the action of the elastic force of the return spring 133, the arc-shaped positioning block 131 is driven to move, and the arc-shaped positioning block is brought into contact with the sides of the first wind blade anti-loosening nut and the second wind blade anti-loosening nut, and the first wind blade anti-loosening nut and the second wind blade anti-loosening nut are assisted in fixing, further preventing the loosening of the first wind blade anti-loosening nut and the second wind blade anti-loosening nut.
[0032] Further, limiting sliders 135 are symmetrically arranged on both sides of the arc-shaped positioning block 131. One end of the limiting sliders 135 is slidably arranged in the limiting sliding grooves 134. The limiting sliding grooves 134 are symmetrically arranged on both sides in the receiving groove 132. The movement of the arc-shaped positioning block 131 drives the limiting sliders 135 to move in the limiting sliding grooves 134, improving the guiding property when the arc-shaped positioning block 131 moves.
[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An improved horizontal axis wind turbine hub, characterized in that: The invention comprises a hub body (4), a plurality of groups of fan blade mounting portions (7) are evenly arranged in an annular shape on the hub body (4), a hollow portion (1) is arranged on the hub body (4) between the plurality of groups of fan blade mounting portions (7), a main shaft mounting opening (3) is arranged in the middle of the hub body (4), and a main shaft nut groove (2) is arranged on the hub body (4) outside the main shaft mounting opening (3); The fan blade mounting portion (7) is provided with a cylindrical boss (9) and a conical boss (8) corresponding to the groove on the fan blade, respectively; the fan blade mounting portion (7) in the cylindrical boss (9) is provided with a first bolt mounting opening (5); the fan blade mounting portion (7) in the conical boss (8) is provided with a second bolt mounting opening (6); and the back side of the fan blade mounting portion (7) is also provided with a first fan blade nut groove (12) and a second fan blade nut groove (13) corresponding to the first bolt mounting opening (5) and the second bolt mounting opening (6); An auxiliary fixing structure for positioning the fan blade anti-loosening nut is provided in both the first fan blade nut groove (12) and the second fan blade nut groove (13); The auxiliary fixing structure comprises an arc-shaped positioning block (131), wherein the arc-shaped positioning block (131) is movably arranged in a receiving groove (132), wherein the receiving groove (132) is arranged in a first fan blade nut groove (12) and a second fan blade nut groove (13), and a return spring (133) is also arranged in the receiving groove (132), wherein one end of the return spring (133) is connected to the arc-shaped positioning block (131).
2. The improved horizontal axis wind turbine hub according to claim 1, characterized in that: A plurality of hollow grooves (11) are also provided on the back side of the fan blade mounting portion (7).
3. The improved horizontal axis wind turbine hub according to claim 1, characterized in that: A hood mounting notch (10) is also provided at the edge of the back of the hub body (4).
4. The improved horizontal axis wind turbine hub according to claim 1, characterized in that: A first magnet block (14) is inlaid on the outer surface of the cylindrical boss (9).
5. The improved horizontal axis wind turbine hub according to claim 1, characterized in that: A second magnet block (15) is embedded on the outer surface of the conical boss (8).
6. The improved horizontal axis wind turbine hub according to claim 1, characterized in that: Limiting slide blocks (135) are symmetrically arranged on both sides of the arc-shaped positioning block (131); one end of the limiting slide block (135) is slidably arranged in a limiting slide groove (134); and the limiting slide groove (134) is symmetrically arranged on both sides of the storage groove (132).