A wind turbine impeller

Abstract

This utility model belongs to the field of wind power generation technology, and proposes a wind turbine impeller, including a connecting bracket, on which blade units are fixedly installed. The connecting bracket includes a connecting sleeve, and a plurality of circumferentially arrayed support rods are arranged on the outer side of the connecting sleeve. The blade units are connected to the ends of the support rods away from the connecting sleeve. The blade units are provided with a wind cavity and an air inlet, and the air inlet and the wind cavity are connected. The wind turbine impeller of this utility model has blade units fixedly installed on the outer side of the connecting bracket. The blade units are provided with a wind cavity and an air inlet, and the air inlet is connected to the wind cavity. Airflow enters the wind cavity of the blade unit through the air inlet, increasing the driving force of the wind on the blade unit, which is beneficial to the rotation of the impeller; thus achieving the effect of improving wind energy utilization.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, and specifically relates to an impeller for a wind turbine. Background Technology

[0002] A vertical-axis impeller is a wind turbine impeller whose blades are distributed across the entire circumference of the impeller, with its main shaft perpendicular to the ground. Its advantages include the ability to utilize wind energy equally in all directions, strong adaptability, and structural stability. The advantages of a vertical-axis impeller include simple design, ease of maintenance, no need for a yaw system, low starting wind speed, and low noise. However, its efficiency may be slightly lower than that of a horizontal-axis impeller, and its size is usually larger.

[0003] The existing technology, disclosed in publication number CN106762465A, is a blade, a wind turbine generator set, and a method that can reduce the pitch frequency during the speed regulation process of a wind turbine generator set. The wind turbine generator set blade includes a hollow cavity containing a mass assembly, a drive assembly, and a sensor. The mass assembly and drive assembly are used to drive the mass assembly to move along the blade's length; the sensor detects the motion of at least some components in the drive assembly or the displacement of the mass assembly. The blade provided by this invention can adjust the impeller speed by changing the moment of inertia of the impeller through the movement of the mass assembly within the blade. Its main problem is how to avoid resonance in flexible towers, which can cause wind turbine generator set malfunctions or prevent tower height increases.

[0004] Therefore, there is a need for a wind turbine impeller that can improve the utilization rate of wind energy. Utility Model Content

[0005] To address the above problems, this utility model proposes a wind turbine impeller, including a connecting bracket, on the outer side of which a blade unit is fixedly installed;

[0006] The connecting bracket includes a connecting sleeve, and a plurality of circumferentially arrayed support rods are provided on the outer side of the connecting sleeve. The end of the support rod away from the connecting sleeve is connected to a blade unit. The blade unit is provided with an air cavity and an air inlet, and the air inlet and the air cavity are connected.

[0007] Furthermore, the air cavity is tilted downwards, and the air inlet is located at the lowest end of the air cavity.

[0008] Furthermore, there are three support rods, which are arranged in a circumferential array on the outside of the connecting sleeve.

[0009] Furthermore, the wind turbine impeller also includes a main shaft, and the connecting sleeve is fitted onto the main shaft.

[0010] Furthermore, a support is provided on the outer surface of the spindle.

[0011] Furthermore, a radial protrusion is provided on the outer surface of the support near the connecting sleeve.

[0012] Furthermore, the outer surface of the spindle is provided with three circumferentially arrayed supports.

[0013] Furthermore, the connecting sleeve is provided with a support groove, and the support is snapped into the support groove.

[0014] Furthermore, a boss is provided at one end of the connecting sleeve near the support, and the support groove passes through the boss.

[0015] Furthermore, the wind turbine also includes a locking component, which is fitted onto the outside of the boss and is located on the side of the radial protrusion away from the connecting sleeve.

[0016] The beneficial effects of this utility model are:

[0017] 1. The impeller of the wind turbine of this utility model has blade units fixedly installed on the outside of the connecting bracket. The blade unit is provided with a wind cavity and an air inlet. The air inlet is connected to the wind cavity. The airflow enters the wind cavity of the blade unit through the air inlet, which increases the driving force of the wind on the blade unit and is conducive to the rotation of the impeller; thus achieving the effect of improving the wind energy utilization rate.

[0018] 2. The wind turbine impeller of this utility model has its wind chamber tilted downwards. Even if an object (leaves, raindrops) enters the wind chamber, the object will automatically fall off after the air inlet of the blade unit turns to the leeward side, because the bottom of the wind chamber of the blade unit is tilted downwards towards the air inlet. This prevents debris and rainwater from accumulating in the wind chamber, increasing the weight of the impeller, and thus reducing the power generation efficiency.

[0019] 3. The impeller for the wind turbine of this utility model includes a support, which restricts the movement of the connecting sleeve, thereby preventing the connecting sleeve from rotating relative to the support.

[0020] 4. The impeller for the wind turbine of this utility model includes a locking component. The locking component is fitted on the outside of the boss and is located on the side of the radial protrusion away from the connecting sleeve. The locking component is a nut. After the support and the connecting sleeve are fitted together, the outer surface has threads. The nut is connected to the threads, which limits the support of the main shaft and the connecting sleeve of the connecting bracket together, thereby achieving fixation.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of the impeller for the wind turbine in an embodiment of this utility model is shown.

[0024] Figure 2 A cross-sectional schematic diagram of the blade unit of the wind turbine impeller in an embodiment of the present invention is shown.

[0025] Figure 3 An exploded schematic diagram of the impeller for a wind turbine in an embodiment of this utility model is shown.

[0026] Figure 4 A schematic diagram showing the installation position of the impeller for the wind turbine in an embodiment of this utility model is shown.

[0027] In the diagram, 10 is the main shaft; 11 is the support; and 111 is the radial protrusion.

[0028] 20. Connecting bracket; 21. Connecting sleeve; 211. Support groove; 212. Boss; 22. Support rod;

[0029] 30. Blade unit; 31. Air inlet; 32. Air cavity;

[0030] 40. Locking components. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example 1,

[0033] refer to Figure 1A wind turbine impeller includes a connecting bracket 20, on the outer side of which blade units 30 are fixedly mounted; the connecting bracket 20 includes a connecting sleeve 21, on the outer side of which are arranged a plurality of circumferentially arrayed support rods 22, the end of the support rods 22 away from the connecting sleeve 21 being connected to the blade unit 30; the blade unit 30 is provided with a wind cavity 32 and an air inlet 31, the air inlet 31 and the wind cavity 32 being connected (reference). Figure 2 Specifically, the blade unit 30 is used to drive the main shaft 10 to rotate by wind energy. The blade unit 30 constructs a wind cavity 32. The opening end of the wind cavity 32 of the blade unit 30 is the air inlet 31, and the other end of the blade unit 30 is the tail end. There are three blade units 30 in total, and the three blade units 30 are arranged in a circular array around the axis of the main shaft 10. The connecting bracket 20 is fixedly connected to the main shaft 10 and fixedly connected to the blade unit 30. The connection state between the blade unit 30 and the connecting bracket 20 is such that the air inlet 31 of the blade unit 30 is inclined downward, that is, the bottom of the wind cavity 32 of the blade unit 30 is inclined downward towards the air inlet 31.

[0034] In the above embodiments, another optional implementation is that the blade unit 30 is used to drive the main shaft 10 to rotate by wind energy. The blade unit 30 constructs a wind cavity 32. The opening end of the wind cavity 32 of the blade unit 30 is the air inlet 31, and the other end of the blade unit 30 is the tail end. Two blade units 30 are provided in total, and the two blade units 30 are arranged in a circular array around the axis of the main shaft 10. The connecting bracket 20 is fixedly connected to the main shaft 10 and fixedly connected to the blade unit 30. The connection state between the blade unit 30 and the connecting bracket 20 is such that the air inlet 31 of the blade unit 30 is inclined downward, that is, the bottom of the wind cavity 32 of the blade unit 30 is inclined downward towards the air inlet 31.

[0035] In the above embodiments, another optional implementation is that the blade unit 30 is used to drive the main shaft 10 to rotate by wind energy. The blade unit 30 constructs a wind cavity 32. The opening end of the wind cavity 32 of the blade unit 30 is the air inlet 31, and the other end of the blade unit 30 is the tail end. A total of four blade units 30 are arranged in a circumferential array around the axis of the main shaft 10. The connecting bracket 20 is fixedly connected to the main shaft 10 and fixedly connected to the blade unit 30. The connection state between the blade unit 30 and the connecting bracket 20 is such that the air inlet 31 of the blade unit 30 is inclined downward, that is, the bottom of the wind cavity 32 of the blade unit 30 is inclined downward toward the air inlet 31.

[0036] Furthermore, the connecting bracket 20 includes a connecting sleeve 21 and support rods 22; the connecting sleeve 21 is used to fit around the outer periphery of the main shaft 10 and form a detachable fixed connection with the main shaft 10; three support rods 22 are fixedly arranged around the outer periphery of the connecting sleeve 21, and each of the three support rods 22 of the connecting bracket 20 is fixedly connected to a blade unit 30.

[0037] In summary, since the blade unit 30 constructs a wind cavity 32, the opening end of the wind cavity 32 of the blade unit 30 is the air inlet 31; the airflow enters the interior of the wind cavity 32 of the blade unit 30 through the air inlet 31, which increases the driving force of the wind on the blade unit 30 and is beneficial to the rotation of the impeller; thus achieving the effect of improving the wind energy utilization rate.

[0038] Furthermore, the air cavity 32 is tilted downwards, and the air inlet 31 is located at the lowest end of the air cavity 32. Specifically, the connection state between the blade unit 30 and the connecting bracket 20 is such that the air inlet 31 of the blade unit 30 is tilted downwards, and the bottom of the air cavity 32 of the blade unit 30 is tilted downwards towards the air inlet 31. In addition, because the air inlet 31 of the blade unit 30 is tilted downwards, even if objects (leaves, raindrops) enter the air cavity 32 through the air inlet 31, after the air inlet 31 of the blade unit 30 turns to the leeward side, the objects will automatically fall down because the bottom of the air cavity 32 of the blade unit 30 is tilted downwards towards the air inlet 31. This prevents debris and rainwater from remaining in the air cavity, which would otherwise cause debris accumulation, increase the weight of the impeller, and reduce power generation efficiency.

[0039] refer to Figure 1 There are three support rods 22, which are arranged in a circumferential array on the outside of the connecting sleeve 21. The connecting bracket 20 includes the connecting sleeve 21 and the support rods 22; the connecting sleeve 21 is used to fit around the outer circumference of the main shaft 10 and form a detachable fixed connection with the main shaft 10; the three support rods 22 are fixedly arranged around the outer circumference of the connecting sleeve 21, and each of the three support rods 22 of the connecting bracket 20 is fixedly connected to a blade unit 30.

[0040] Specifically, three supports 11 are provided, and the three supports 11 are fixed to the outer periphery of the spindle 10 in a circumferential array; the connecting bracket 20 has three support slots 211 on the lower side of the connecting sleeve 21, the supports 11 are used to insert into the support slots 211 and the supports 11 are used to support and limit the connecting sleeve 21 of the connecting bracket 20; the locking member 40 is used to limit the supports 11 of the spindle 10 and the connecting sleeve 21 of the connecting bracket 20 together.

[0041] refer to Figure 3 A wind turbine impeller also includes a main shaft 10, with a connecting sleeve 21 fitted onto the main shaft 10. Specifically, the main shaft 10 is vertically arranged, and its lower end is used for coaxial fixed connection with the generator's rotating shaft. By installing the connecting bracket 20 onto the main shaft 10, the connecting bracket 20 drives the main shaft 10 to rotate, thereby realizing the generation of electricity by driving the generator.

[0042] Furthermore, a support 11 is provided on the outer surface of the spindle 10. Specifically, the outer periphery of the connecting sleeve 21 is provided with threads, the locking member 40 is annular and its inner cavity is provided with threads, and the inner periphery thread of the annular locking member 40 is threadedly connected to the outer periphery thread of the connecting sleeve 21; the support 11 is located in the support groove 211 of the connecting bracket 20, thereby restricting the relative rotation between the connecting sleeve 21 and the spindle 10.

[0043] In the above embodiments, another optional implementation is that a radial protrusion 111 is provided on the outer surface of the support 11 near the connecting sleeve 21. Specifically, the radial protrusion 111 is fixedly provided on the outer surface of the support 11; the outer periphery of the connecting sleeve 21 is provided with threads, the locking member 40 is annular and its inner cavity is provided with threads, and the inner peripheral thread of the annular locking member 40 is threadedly connected to the outer peripheral thread of the connecting sleeve 21; the radial protrusion 111 is located above the annular locking member 40, thereby restricting the upward movement of the connecting sleeve 21.

[0044] In this embodiment of the invention, the outer surface of the spindle 10 has three supports 11 arranged in a circumferential array. The three supports 11 are fixed to the outer circumference of the spindle 10; the connection bracket 20 is limited by setting three supports 11. The connection bracket 20 has three support slots 211 on the lower side of the connecting sleeve 21. The supports 11 are used to insert into the support slots 211 and support and limit the connection sleeve 21 of the connection bracket 20; the locking member 40 is used to limit the supports 11 of the spindle 10 and the connecting sleeve 21 of the connection bracket 20 together.

[0045] refer to Figure 3 The connecting sleeve 21 is provided with a support groove 211, and the support 11 and the radial protrusion 111 are engaged in the support groove 211. Three support grooves 211 are opened on the lower side of the connecting sleeve 21. The support 11 is used to insert into the support groove 211 and the support 11 supports and limits the connecting sleeve 21 of the connecting bracket 20. The locking member 40 is used to limit the support 11 of the spindle 10 and the connecting sleeve 21 of the connecting bracket 20 together.

[0046] refer to Figure 3 The connecting sleeve 21 has a boss 212 at one end near the support 11, and the support groove 211 passes through the boss 212. The outside of the boss 212 is threaded, and the thread engages with the thread on the inside of the locking member 40 to fix the main shaft 10, the connecting bracket 20 and the blade unit 30.

[0047] refer to Figure 4The wind turbine also includes a locking element 40, which is fitted onto the outside of the boss 212 and is located on the side of the radial protrusion 111 away from the connecting sleeve 21. The locking element 40 is a nut, and the support 11 and the connecting sleeve 21 are threaded together. The nut engages with the thread to bind the support 11 of the main shaft 10 and the connecting sleeve 21 of the connecting bracket 20 together.

[0048] Working Principle: This utility model relates to the field of wind power generation, and in particular to a wind turbine impeller. The main shaft 10 is vertically arranged, and the lower end of the main shaft 10 is fixedly connected coaxially with the rotating shaft of the generator. The blade unit 30 is used to drive the main shaft 10 to rotate with the help of wind energy. The blade unit 30 constructs a wind cavity 32. The opening end of the wind cavity 32 of the blade unit 30 is the air inlet 31, and the other end of the blade unit 30 is the tail end. There are three blade units 30 in total, and the three blade units 30 are arranged in a circular array around the axis of the main shaft 10. The connecting bracket 20 is fixedly connected to the main shaft 10 and the blade unit 30. The connection state between the blade unit 30 and the connecting bracket 20 is such that the air inlet 31 of the blade unit 30 is inclined downward, and the bottom of the wind cavity 32 of the blade unit 30 is inclined downward towards the air inlet 31.

[0049] Example 2,

[0050] A boss 212 is provided at one end of the support groove 211 near the support 11, and the support groove 211 passes through the boss 212. The outer side of the boss 212 is a conical surface, which mates with the inner conical surface of the locking member 40, thereby fixing the main shaft 10, the connecting bracket 20, and the blade unit 30. Specifically, the wind turbine also includes a locking member 40, which is fitted on the outer side of the boss 212 and is located on the side of the radial protrusion 111 away from the connecting sleeve 21. The locking member 40 is an interference fit collar. After the support 11 and the connecting sleeve 21 are fitted together, there is a boss. The locking member 40 is interference fit with the boss, which confines the support 11 of the main shaft 10 and the connecting sleeve 21 of the connecting bracket 20 together.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blade wheel for a wind power generator, characterized by, Includes a connecting bracket (20), on the outside of which a blade unit (30) is fixedly installed; The connecting bracket (20) includes a connecting sleeve (21), and a plurality of circumferentially arrayed support rods (22) are provided on the outside of the connecting sleeve (21). The end of the support rod (22) away from the connecting sleeve (21) is connected to a blade unit (30). The blade unit (30) is provided with an air cavity (32) and an air inlet (31), and the air inlet (31) and the air cavity (32) are connected.

2. A blade wheel for a wind power generator according to claim 1, wherein The air cavity (32) is tilted downwards, and the air inlet (31) is located at the lowest end of the air cavity (32).

3. A blade wheel for a wind power generator according to claim 1, wherein There are three support rods (22), which are arranged in a circumferential array on the outside of the connecting sleeve (21).

4. A blade wheel for a wind power generator according to any one of claims 1 to 3, characterized in that, The impeller for the wind turbine also includes a main shaft (10), and the connecting sleeve (21) is fitted onto the main shaft (10).

5. A blade wheel for a wind power generator according to claim 4, wherein A support (11) is provided on the outer surface of the main shaft (10).

6. A blade wheel for a wind power generator according to claim 5, wherein The outer surface of the support (11) near the connecting sleeve (21) has a radial protrusion (111).

7. A blade wheel for a wind power generator according to claim 5 or 6, wherein The outer surface of the main shaft (10) is provided with three circumferentially arrayed supports (11).

8. A blade wheel for a wind power generator according to claim 5 or 6, wherein The connecting sleeve (21) is provided with a support groove (211), and the support (11) is snapped into the support groove (211).

9. A blade wheel for a wind power generator according to claim 8, wherein The connecting sleeve (21) has a boss (212) at one end near the support (11), and the support groove (211) passes through the boss (212).

10. A blade wheel for a wind power generator according to claim 9, wherein The wind turbine also includes a locking element (40), which is fitted on the outside of the boss (212) and is located on the side of the radial protrusion (111) away from the connecting sleeve (21).

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