Calibrating and centering device for blade root of wind driven generator

Abstract

The utility model relates to the field of wind driven generator blades, and discloses a wind driven generator blade root calibrating and centering device which comprises a blade and a jig frame used for placing and fixing the blade, one end of the jig frame is provided with the calibrating and centering device used for the blade root, and the calibrating and centering device comprises a base, a driving piece, a shaping ring and an expansion ring. The shaping ring and the expansion ring are installed on the side face of the base through two sets of driving pieces respectively and are coaxially arranged from outside to inside, and the inner circumferential face of the shaping ring and the outer circumferential face of the expansion ring are matched with the outer circumferential face and the inner circumferential face of the root of the blade respectively. The device can calibrate the root of the blade, the shape and the size of the root of the blade are restrained by taking the shaping ring as a mold, and when a root flange is mounted and the root flange is connected with a hub flange, the size error can be reduced as much as possible, the construction difficulty is lowered, and smooth mounting of the root of the blade is ensured. And when the blade is disassembled and maintained, the root part of the old blade can be calibrated and centered, so that the reinstallation can be smoothly carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind force blade technical field, especially a wind generator blade root calibration centering device. BACKGROUND

[0002] Fan blade is one of the core components of wind driven generator, about 15%-20% of total cost of fan, it designs good or bad will be directly related to the performance of fan and benefit.

[0003] Fan blade is very high to material requirement, not only need to have lighter weight, also need to have higher strength, corrosion resistance, fatigue resistance, therefore, the fan production party of present time widely adopts composite material to manufacture fan blade, and the proportion of composite material even reaches 90% in entire fan blade. Fan blade is very high to material requirement, not only need to have lighter weight, also need to have higher strength, corrosion resistance, fatigue resistance, therefore, the fan production party of present time widely adopts composite material to manufacture fan blade, and the proportion of composite material even reaches 90% in entire fan blade.

[0004] Blade root and hub are connected, and whether it matches with hub is related to installation progress and difficulty, generally, blade root is produced according to drawing size, but error is produced in production procedure, and after the amplification of multiple procedures, the size error of blade root can be shown more, so that the connecting flange between blade root and hub can not be well butted in actual installation, has installation deviation, and construction is affected. UTILITY MODEL CONTENTS

[0005] The utility model discloses a wind generator blade root calibration centering device, to solve the problem that the connecting flange between blade root and hub can not be well butted because the error of blade root is produced in production process, has installation deviation, and construction is affected.

[0006] To solve the above technical problem, the utility model adopts the following technical scheme:

[0007] A wind turbine blade root alignment centering device is arranged at one end of a jig for placing and fixing a blade, the alignment centering device comprises a base, driving members, a sizing ring and a tension ring, the sizing ring and the tension ring are respectively installed on the side of the base through a group of driving members, the sizing ring is sleeved outside the tension ring, and the sizing ring and the tension ring are coaxially arranged, wherein,

[0008] The inner circumferential surface of the sizing ring and the outer circumferential surface of the tension ring are respectively matched with the outer circumferential surface and the inner circumferential surface of the blade root.

[0009] Further technical solutions are that the driving members are oil cylinders or air cylinders.

[0010] Further technical solutions are that the outer end of the sizing ring is provided with a flared trumpet mouth, the maximum caliber of the trumpet mouth is greater than the outer diameter of the blade root, and the minimum caliber of the trumpet mouth is consistent with the inner diameter of the sizing ring.

[0011] Further technical solutions are that the sizing ring is provided with a heating member, and the heating member is an electric heating element or a medium heat conduction pipe.

[0012] Further technical solutions are that the tension ring comprises an inner ring, an annular air bag and an air pump, the air pump is installed on the base, the inner ring is installed on the power output end of one group of driving members, the annular air bag is installed on the outer circumferential surface of the inner ring, and the air inlet end of the annular air bag is communicated with the air outlet end of the air pump.

[0013] Further technical solutions are that the annular air bag and the inner ring form an inflation cavity, the inner ring is provided with a gas pressure sensor in the inflation cavity, and the gas pressure sensor and the controller on the air pump are electrically connected.

[0014] Further technical solutions are that the base is provided with a counterweight.

[0015] Further technical solutions are that the base is provided with a supporting plate for the sizing ring.

[0016] Compared with the prior art, the utility model can at least achieve one of the following beneficial effects:

[0017] The utility model provides a kind of wind generator blade root calibration centering device, the device can be calibrated to some blade roots with shape plasticity, for some size error blade root, with the help of sizing ring, the outer peripheral surface of blade root can be orthopedic, also play the role of fixing blade root when expansion ring works, expansion ring is from inside to outside and tightly presses the inner wall of blade root, expansion ring cooperates sizing ring and acts on blade root to calibrate, with sizing ring as mould to constrain the shape and size of blade root, when installing root flange and root flange and hub flange are connected, size error can be reduced as far as possible, reduce construction difficulty, guarantee the smooth installation of blade root.

[0018] And when blade is disassembled and maintained, the root of old blade can also be calibrated and centered to facilitate the smooth installation of again. DRAWINGS

[0019] Figure 1 It is the structure schematic view of blade and mould in the utility model.

[0020] Figure 2 It is the structure schematic view of a kind of wind generator blade root calibration centering device of the utility model.

[0021] Figure 3 It is the structure schematic view of the utility model Figure 2 Middle expansion ring.

[0022] Figure 4 It is the structure schematic view of the utility model Figure 3 Middle inner ring and annular air bag.

[0023] Figure 5 It is the structure schematic view of the utility model Figure 2 Middle sizing ring.

[0024] Figure 6 It is the structure schematic view of wind turbine blade in prior art.

[0025] Sign: 1, blade root; 2, jig frame; 3, calibration centering device; 4, base; 5, driving part; 6, sizing ring; 7, expansion ring; 8, horn mouth; 9, heating element; 10, inner ring; 11, annular air bag; 12, air pump; 13, counterweight; 14, supporting plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Embodiment one:

[0033] This implementation example Figure 1 and Figure 2 As shown, the calibration and alignment device is located at one end of the jig 2 used to place and fix the blades. The calibration and alignment device 3 includes a base 4, a driving component 5, a shaping ring 6, and a tightening ring 7. The shaping ring 6 and the tightening ring 7 are respectively mounted on the side of the base 4 through a set of driving components 5. The shaping ring 6 is sleeved on the tightening ring 7, and the shaping ring 6 and the tightening ring 7 are coaxially arranged.

[0034] The inner circumferential surface of the shaping ring 6 and the outer circumferential surface of the tightening ring 7 are respectively adapted to the outer circumferential surface and the inner circumferential surface of the leaf root 1.

[0035] The blades are wind turbine blades, such as... Figure 6 As shown, the blade root 1 is connected to the hub of the generator by a flange connection, that is, a flange is provided on the blade root 1, and the flange must be aligned with the hub flange for connection.

[0036] The working principle of this device is as follows: After the blades are processed, they are generally placed on the jig 2. Each group (usually three blades) is matched with the dimensions of the blade root to be re-measured. Installation is simulated according to the mounting position on the generator hub. For blade roots with incorrect dimensions or errors, calibration is performed to facilitate actual alignment and installation. During calibration, the blades are fixed using general methods such as clamping. Then, the device is moved to the blade root 1, and the positions of the shaping ring 6 and the tightening ring 7 are adjusted. Specifically, when the blade root 1 needs calibration, the device is moved to one end of the jig 2 using a forklift, overhead crane, or a chassis mounted on the bottom. One set of drive components 5 is activated first, moving the shaping ring 6 towards the blade root 1. The shaping ring 6 gradually contacts the outer wall of the blade root 1, constraining and shaping the outer peripheral wall of the blade root 1. When the shaping ring 6 is fully in place, another set of drive components 5 is activated, pushing the tightening ring 7 into the inner cavity of the blade root 1. Once in place, the tightening ring 7... A general annular or circular airbag (such as various wheel-shaped inner tubes, etc., with appropriate internal pressure can be selected) can be used to inflate the expansion ring 7, thereby expanding it and pressing it against the inner circumferential wall of the blade root 1. Together with the shaping ring 6, it acts on the blade root 1 from the inside and the outside. The shaping ring 6 serves as a calibrated mold (the size parameters of the shaping ring 6 are compatible with the size parameters of the blade root drawing), so as to achieve the effect of calibrating the blade root 1 and facilitating the smooth connection between the blade root flange and the hub flange (mainly the alignment between the two flanges).

[0037] The jig 2 is a general tool used to store and fix the blades, mainly playing a role in protecting and preventing the blades from moving during the calibration process.

[0038] Of course, this device is not only for the blades produced, but can also be used to calibrate and align blades that have been deformed during transportation or require maintenance after use.

[0039] Under the action of an external air source, the air pressure of the expansion ring 7 can be controlled by the controller to open and close the solenoid valve. For example, when the air pressure does not meet the requirements, the solenoid valve is in the open state, and the external air source continues to supply air to the expansion ring 7 until sufficient pressure is reached (which can be achieved with the help of an air pressure sensor), at which point the solenoid valve closes.

[0040] The inner circumferential surface of the shaping ring 6 and the outer circumferential surface of the tightening ring 7 are respectively adapted to the outer circumferential surface and the inner circumferential surface of the blade root 1. That is, if the shape of the blade root is circular, the shaping ring 6 and the tightening ring 7 are also circular accordingly. If the shape of the blade root is elliptical, the shaping ring 6 and the tightening ring 7 are also elliptical accordingly, so as to ensure that the blade root 1 can achieve a good calibration effect.

[0041] Preferably, the driving component 5 is a hydraulic cylinder or a pneumatic cylinder.

[0042] If stroke control requirements are not a concern or the output force is not high, a pneumatic cylinder can be used; if stroke control is required (e.g., stopping arbitrarily within the stroke range) and higher pressure is needed, a hydraulic cylinder can be used. Both pneumatic and hydraulic cylinders achieve pneumatic or hydraulic effects through their respective pneumatic and hydraulic systems.

[0043] Example 2:

[0044] Based on the above embodiments, this embodiment, for example Figure 5 As shown, the outer end of the shaping ring 6 is provided with a flared horn 8 facing outward. The maximum diameter of the flared horn 8 is greater than the outer diameter of the blade root 1, and the minimum diameter of the flared horn 8 is the same as the inner diameter of the shaping ring 6.

[0045] When using the shaping ring 6 to constrain or straighten the root 1 of the blade, the bell mouth 8 serves as a guide.

[0046] Example 3:

[0047] Based on the above embodiments, this embodiment, for example Figure 4 As shown, a heating element 9 is provided inside the shaping ring 6. The heating element is an electric heating element or a medium heat conduction pipe.

[0048] The electric heating element (heating wire or heating tube) is electrically connected to an external controllable power source, meaning its temperature is adjustable. Under the influence of the external power source, the electric heating element is distributed in a spiral shape and heats the root of the blade 1. The heat transfer medium is heat transfer oil or steam pipe, connected to the external heating source. This design allows for the softening of the fiberglass material through heating, facilitating the calibration of the blade root 1 by the shaping ring 6 or the shaping ring 6 and the tightening ring 7 together. Furthermore, heating results in lower calibration pressure and better subsequent molding effects.

[0049] The electric heating element or the medium heat conduction tube can be arranged in a spiral winding manner along the axial direction of the blade root 1, so that the heating is uniform.

[0050] It is worth noting that: for the blade root 1 of aluminum alloy or other materials that cannot be softened by heating, heating is not required, and the calibration can be performed directly by applying pressure provided by the device.

[0051] Example 4:

[0052] Based on the above embodiments, this embodiment, for example Figure 3 As shown, the tensioning ring 7 includes an inner ring 10, an annular airbag 11, and an air pump 12. The air pump 12 is mounted on the base 4. The inner ring 10 is mounted on the power output end of one of the drive components 5. The annular airbag 11 is mounted on the outer circumferential surface of the inner ring 10, and the air inlet end of the annular airbag 11 is connected to the air outlet end of the air pump 12.

[0053] The inner ring 10 serves to support the annular airbag 11 and bring it closer to the inner wall of the blade root 1. Under the action of the air pump 12, the annular airbag 11 gradually expands, compressing the inner wall of the blade root 1. This, in conjunction with the shaping ring 6, clamps the blade root 1 from both inside and outside, serving a calibration function and facilitating flange alignment and connection during later installation. The air pressure of the annular airbag 11 can be controlled by the controller to open and close the solenoid valve. For example, when the air pressure is insufficient, the solenoid valve is open, and the external air source (air pump 12) continuously supplies air to the expansion ring 7 until sufficient pressure is reached (which can be achieved using a pressure sensor), at which point the solenoid valve closes.

[0054] Preferably, an inflation chamber is formed between the annular airbag 11 and the inner ring 10, and a pressure sensor located in the inflation chamber is provided on the inner ring 10. The pressure sensor is electrically connected to the controller on the air pump.

[0055] A pressure sensor is installed on the outer circumference of the inner ring 10 to provide real-time feedback on the air pressure of the annular airbag 11, ensuring that the air pressure is appropriate.

[0056] Preferably, a counterweight 13 is provided on the base 4.

[0057] As the drive unit 5 moves the shaping ring 6 and the expansion ring 7 toward the blade root 1, the center of gravity of the device will continuously shift. The counterweight 13 can reduce the risk of tipping over caused by the shift in the center of gravity.

[0058] Preferably, the base 4 is provided with a support plate 14 for the shaping ring 6.

[0059] As the drive unit 5 moves the shaping ring 6 and the expansion ring 7 toward the blade root 1, the center of gravity of the device will continuously shift, and the support plate 14 can bear part of the weight, reducing the force on the drive unit 5.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind generator blade root alignment centering device, the alignment centering device being arranged at one end of a cradle (2) for receiving and securing a blade, characterized in that: The calibration centering device (3) comprises a base (4), driving members (5), a sizing ring (6) and a tension ring (7), the sizing ring (6) and the tension ring (7) are respectively installed on the side of the base (4) through a group of driving members (5), the sizing ring (6) is sleeved outside the tension ring (7), and the sizing ring (6) and the tension ring (7) are coaxially arranged. The inner circumferential surface of the sizing ring (6) and the outer circumferential surface of the tension ring (7) are respectively matched with the outer circumferential surface and the inner circumferential surface of the blade root (1).

2. A wind generator blade root alignment centring device according to claim 1, characterised in that: The outer end of the sizing ring (6) is provided with a flared trumpet mouth (8) outward, the maximum caliber of the trumpet mouth (8) is greater than the outer diameter of the blade root (1), and the minimum caliber of the trumpet mouth (8) is consistent with the inner diameter of the sizing ring (6).

3. A wind generator blade root alignment and centering device according to claim 1, characterised in that: The sizing ring (6) is provided with a heating member (9) inside, and the heating member is an electric heating element or a medium heat conduction pipe.

4. The wind generator blade root alignment and centering device of claim 1, wherein: The tension ring (7) comprises an inner ring (10), an annular air bag (11) and an air pump (12), the air pump (12) is arranged on the base (4), the inner ring (10) is installed on the power output end of one group of driving members (5), the annular air bag (11) is installed on the outer circumferential surface of the inner ring (10), and the air inlet end of the annular air bag (11) is in communication with the air outlet end of the air pump (12).

5. A wind generator blade root alignment centring device according to claim 4, characterised in that: An inflation cavity is formed between the annular air bag (11) and the inner ring (10), a gas pressure sensor is arranged on the inner ring (10) in the inflation cavity, and the gas pressure sensor and a controller on the air pump are electrically connected.

6. The wind generator blade root alignment and alignment device of claim 1, wherein: A counterweight (13) is arranged on the base (4).

7. The wind generator blade root alignment and centering device of claim 1, wherein: A supporting plate (14) for the sizing ring (6) is arranged on the base (4).

8. The wind generator blade root alignment and centering device of claim 1, wherein: The driving member (5) is an oil cylinder or an air cylinder.

Images