Shockproof connecting structure with blade shaft penetrating through wind wheel circular frame

Abstract

The utility model discloses a shockproof connecting structure with a blade shaft penetrating through a wind wheel circular frame, and relates to the technical field of wind power generation, the shockproof connecting structure comprises the wind wheel circular frame, a horizontal shaft support circular frame and the blade shaft, the wind wheel circular frame is fixed outside the horizontal shaft support circular frame, and the wind wheel circular frame is provided with a through hole for mounting the blade shaft; blades are fixedly installed at the positions, on the inner side and the outer side of the wind wheel round frame, of the blade shaft, a pulling piece is arranged at the end, close to the horizontal shaft support round frame, of the blade shaft and connected with the horizontal shaft support round frame, and a shockproof assembly used for stabilizing the blades is arranged on the blade shaft. The vibration of the blades can be weakened or even eliminated, long-term rigid collision between the blades and the wind wheel circular frame is prevented, and the phenomena of bracket breakage and serious potential safety hazard factors caused by screw looseness are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a shockproof connection structure in which a blade shaft penetrates a wind wheel circular frame. Background Art

[0002] With the continuous development of clean energy, more and more power companies have begun to devote themselves to the research of wind power generation, in which wind turbines are commonly used. In our large wind turbines, the stability of the blades is related to the safety of the entire wind turbine.

[0003] Traditional wind turbines are cantilever beam structures with three blades. As the blades are pushed by strong and light winds for a long time, the screws and bracket connections of the entire wind wheel often become loose and cracked, causing serious safety hazards such as bracket breakage and screw loosening when the bracket vibrates. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned related technologies, this application provides the following technical solutions:

[0005] The blade shaft passes through the anti-vibration connection structure of the wind wheel circular frame, including a wind wheel circular frame, a horizontal axis support circular frame and a blade shaft. The wind wheel circular frame is fixed to the outside of the horizontal axis support circular frame. The wind wheel circular frame is provided with a through hole for installing the blade shaft. Blades are fixedly installed on both the inner and outer sides of the wind wheel circular frame of the blade shaft. A pull piece is provided at one end of the blade shaft close to the horizontal axis support circular frame and connected to the horizontal axis support circular frame. An anti-vibration component for stabilizing the blade is provided on the blade shaft.

[0006] As a preferred solution of the shockproof connection structure in which the blade shaft passes through the wind wheel frame as described in the present application, the shockproof component includes a shockproof spring, which is sleeved on the blade shaft, and one end of the shockproof spring is against the wind wheel frame.

[0007] As a preferred solution of the shockproof connection structure in which the blade shaft passes through the wind wheel circular frame described in the present application, a pressure bearing is arranged between the shockproof spring and the blade.

[0008] As a preferred solution of the shockproof connection structure in which the blade shaft passes through the wind wheel circular frame described in the present application, a positioning seat is provided on the wind wheel circular frame to prevent the shockproof spring from shifting.

[0009] As a preferred solution of the anti-vibration connection structure in which the blade shaft passes through the wind wheel circular frame described in the present application, there is a certain gap between the inner wall of the through hole and the blade shaft.

[0010] As a preferred solution of the shock-proof connection structure in which the blade shaft passes through the wind wheel circular frame as described in the present application, a first bearing is provided at one end of the blade shaft close to the horizontal axis support circular frame, and an inner-frame blade mutual tension member for connecting two adjacent blade shafts is provided on the first bearing; a second bearing is provided at one end of the blade shaft away from the horizontal axis support circular frame, and an outer-frame blade mutual tension member for connecting two adjacent blade shafts is provided on the second bearing.

[0011] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0012] 1. In this case, by setting up the anti-vibration components, the vibration of the blades can be weakened or even eliminated, and the long-term rigid collision between the blades and the wind wheel frame can be prevented, reducing the serious unsafe hidden dangers caused by the bracket breakage and loose screws;

[0013] 2. By setting the blade mutual pulling members inside the frame and the blade mutual pulling members outside the frame, multiple blade shafts are pulled against each other so that the forces offset each other, which can increase the overall strength of the wind wheel and thus improve the stability of the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front structure of the wind wheel in the embodiment of the present application;

[0015] Figure 2 This is a cross-sectional schematic diagram of a shockproof assembly in an embodiment of the present application;

[0016] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0017] Figure 4 for Figure 1 A magnified schematic diagram of point B in the middle.

[0018] In the figure: 1. wind wheel circular frame; 11. through hole; 12. positioning seat; 2. horizontal axis bracket circular frame; 3. blade shaft; 4. blade; 5. pull piece; 6. shockproof assembly; 61. shockproof spring; 62. pressure bearing; 7. first bearing; 8. blade mutual pull piece inside the frame; 9. second bearing; 10. blade mutual pull piece outside the frame. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of this application clearer, the following Figure 1-4 The implementation methods of the present application are described in further detail.

[0020] This embodiment provides a vibration-proof connection structure where the blade shaft passes through the wind wheel frame. Figure 1The anti-vibration connection structure in which the blade shaft passes through the wind rotor frame includes a wind rotor frame 1, a horizontal axis support frame 2 and a blade shaft 3. The wind rotor frame 1 is fixed to the outside of the horizontal axis support frame 2. In this case, the wind rotor frame 1 is fixed to the horizontal axis support frame 2 by using multiple sets of steel wire ropes to pull each other, which not only meets the strength requirements of the wind rotor, but also reduces the material and weight of the wind rotor, thereby saving the manufacturing cost of the wind rotor.

[0021] See also Figure 2 and Figure 3 The wind wheel frame 1 is provided with a through hole 11 for installing the blade shaft 3, and the blade shaft 3 is fixedly installed with blades 4 on both the inner and outer sides of the wind wheel frame 1; in this case, the through hole 11 is a through hole with a circular cross-section, and there is a certain gap between the inner wall of the through hole 11 and the blade shaft 3, so that the blade shaft 3 can rotate; a tension spring is fixedly connected to one side of the blade 4, and a motor with a wire rope and a wire wheel is provided on the other side. The blade 4 is pulled by the motor so that the windward angle of the blade 4 can be adjusted according to the wind force.

[0022] See also Figure 1 and Figure 4 A pull piece 5 is provided at one end of the blade shaft 3 close to the horizontal axis support circular frame 2 and connected to the horizontal axis support circular frame 2. The pull piece 5 can be a steel wire rope or a tension spring. A shockproof component 6 for stabilizing the blade 4 is provided on the blade shaft 3. In this case, the shockproof component 6 includes a shockproof spring 61. The shockproof spring 61 is a compression spring. The shockproof spring 61 is sleeved on the blade shaft 3, and one end of the shockproof spring 61 is against the wind wheel circular frame 1. A positioning seat 12 is provided on the wind wheel circular frame 1, and the positioning seat 12 is formed with A groove is provided for the shockproof spring 61 to be inserted into, thereby preventing the shockproof spring 61 from shifting and improving the installation stability of the shockproof spring 61; a pressure bearing 62 is arranged between the shockproof spring 61 and the blade 4, and the pressure bearing 62 adopts a thrust bearing or other bearing that can better withstand the axial force of the blade shaft 3; specifically, the upper disc of the pressure bearing 62 is fixedly connected to the blade shaft 3, and the lower disc of the pressure bearing 62 is against the shockproof spring 61, so as to cooperate with the pull piece 5 to install and fix the blade shaft 3 on the wind wheel circular frame 1.

[0023] The end of the blade shaft 3 close to the horizontal axis support circular frame 2 is provided with a first bearing 7, and the first bearing 7 is provided with an inner-frame blade mutual tension member 8 for connecting two adjacent blade shafts 3. The end of the blade shaft 3 away from the horizontal axis support circular frame 2 is provided with a second bearing 9, and the second bearing 9 is provided with an outer-frame blade mutual tension member 10 for connecting two adjacent blade shafts 3. In this case, the inner-frame blade mutual tension member 8 and the outer-frame blade mutual tension member 10 are made of steel wire ropes, and tension springs or other tension members 5 can also be used to connect two adjacent blade shafts 3, so that multiple blade shafts 3 are pulled together to form a whole, thereby increasing the stability and shockproof effect of the wind wheel.

[0024] During actual use, the blades 4 vibrate under the action of wind force, which can be buffered by the shock-proof spring 61. At the same time, under the pulling force of the pulling member 5, the blade mutual pulling member 8 inside the frame and the blade mutual pulling member 10 outside the frame, the vibration can be weakened or offset.

[0025] Although the present application has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present application may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. The blade shaft passes through the wind wheel frame, and the shockproof connection structure is characterized by: The invention comprises a wind wheel circular frame (1), a horizontal axis support circular frame (2) and a blade shaft (3), wherein the wind wheel circular frame (1) is fixed to the outside of the horizontal axis support circular frame (2), the wind wheel circular frame (1) is provided with a through hole (11) for installing the blade shaft (3), the blade shaft (3) is fixedly provided with blades (4) on both the inner and outer sides of the wind wheel circular frame (1), one end of the blade shaft (3) close to the horizontal axis support circular frame (2) is provided with a pull piece (5) connected to the horizontal axis support circular frame (2), and the blade shaft (3) is provided with a shockproof component (6) for stabilizing the blade (4).

2. The anti-vibration connection structure of the blade shaft penetrating the wind wheel circular frame according to claim 1 is characterized in that: The anti-vibration component (6) comprises an anti-vibration spring (61), wherein the anti-vibration spring (61) is sleeved on the blade shaft (3), and one end of the anti-vibration spring (61) abuts against the wind wheel circular frame (1).

3. The anti-vibration connection structure of the blade shaft penetrating the wind wheel circular frame according to claim 2 is characterized in that: A pressure bearing (62) is provided between the anti-vibration spring (61) and the blade (4).

4. The anti-vibration connection structure of the blade shaft penetrating the wind wheel circular frame according to claim 2 is characterized in that: The wind wheel circular frame (1) is provided with a positioning seat (12) for preventing the anti-vibration spring (61) from shifting.

5. The anti-vibration connection structure of the blade shaft penetrating the wind wheel circular frame according to claim 1 is characterized in that: There is a certain gap between the inner wall of the through hole (11) and the blade shaft (3).

6. The anti-vibration connection structure of the blade shaft penetrating the wind wheel circular frame according to claim 1 is characterized in that: A first bearing (7) is provided at one end of the blade shaft (3) close to the horizontal axis support circular frame (2), and an inner-frame blade inter-tensioning member (8) for connecting two adjacent blade shafts (3) is provided on the first bearing (7); a second bearing (9) is provided at one end of the blade shaft (3) away from the horizontal axis support circular frame (2), and an outer-frame blade inter-tensioning member (10) for connecting two adjacent blade shafts (3) is provided on the second bearing (9).

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