CN114687960A - Vortex-induced vibration suppression device, blade assembly and wind turbine generator - Google Patents

Abstract

The invention relates to the technical field of wind turbines, in particular to a vortex-induced vibration suppression device, a blade assembly and a wind turbine. The vortex-induced vibration suppression device includes a spoiler sleeve, the cross-sectional area of the spoiler jacket gradually decreases from one end to the other end, and the spoiler jacket is used for wrapping the tip portion of the blade. The blade assembly includes the vortex-induced vibration suppression device described above. The wind turbine includes the aforementioned blade assembly. The vortex-induced vibration suppression device, blade assembly and wind turbine provided by the present invention can largely alleviate the problem of blade resonance caused by vortex-induced vibration, so that the blade is not easily damaged due to severe swing; in addition, the spoiler sleeve also facilitates put on and take off.

Description

Vortex-induced vibration suppression device, blade assembly and wind turbine

technical field

The present invention relates to the technical field of wind turbines, and in particular, to a vortex-induced vibration suppression device, a blade assembly and a wind turbine.

Background technique

A wind turbine is a device that uses natural wind to drive blades to rotate and generate electricity to convert wind energy into electrical energy.

When the existing wind turbine is hoisted or stopped, vortices often appear when the air flows through the blades, and vortex-induced vibration may occur. When the separation frequency of the vortices on the blades is close to the natural frequency of the blades, the blades are prone to resonance. When the swing is severe, damage can occur.

To sum up, how to overcome the above-mentioned defects of the blades of the existing wind turbines is a technical problem to be solved urgently by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vortex-induced vibration suppression device, a blade assembly and a wind turbine, so as to alleviate the technical problem that the blades of the wind turbine in the prior art are easily damaged by vortex-induced vibration.

The vortex-induced vibration suppression device provided by the present invention includes a spoiler sleeve, the cross-sectional area of the spoiler jacket gradually decreases from one end to the other end, and the spoiler jacket is used to wrap the tip of the blade.

Preferably, as an embodiment, the spoiler cover includes a spoiler body and a strap, the spoiler body is used to wrap the tip portion of the blade, and the strap is connected to the spoiler body The end with a larger cross-sectional area, and the strap is used to fasten the blade, and the spoiler sleeve can fall off after the strap is loosened.

Preferably, as an embodiment, the vortex-induced vibration suppression device further comprises a connecting wire and a driver, the driver is used to be mounted on the blade, one end of the connecting wire is connected to the driver, the driver The other end of the connecting wire is connected to the loose end of the strap, the driver is used to shorten or lengthen the connecting wire, and the spoiler belt can pull the strap to loosen when shortened.

Preferably, as an embodiment, the vortex-induced vibration suppression device further includes a vortex-induced vibration detector and a controller, the vortex-induced vibration detector is electrically connected to the controller, and the vortex-induced vibration detector is electrically connected to the controller. Installed on the blade, the vortex-induced vibration detector is used to detect the vortex-induced vibration signal of the blade.

The controller is electrically connected to the driver, and the controller is used to control the operation of the driver; and/or the vortex-induced vibration suppression device further includes an alarm, and the alarm is electrically connected to the controller , the controller is used to control the alarm to give an alarm.

Preferably, as an embodiment, the spoiler sleeve includes a mesh cylinder, and the mesh cylinder is used to cover the tip portion of the blade;

Or, the spoiler sleeve includes a spoiler strip and a plurality of spoiler blocks, a plurality of the spoiler blocks are connected to the spoiler strip in series, and the spoiler strip is spirally wound around the tip of the blade department.

Preferably, as an embodiment, the material of the mesh cylinder is nylon or cloth;

Or, the spoiler band is a rope, and the spoiler block is made of foam, plastic or light rubber.

Preferably, as an embodiment, the ratio of the length of the spoiler sleeve to the length of the blade tip portion is 1/3, 3/5 or 2/3.

Preferably, as an embodiment, the vortex-induced vibration suppression device further comprises a streamlined vortex generator, the vortex generator is used to be installed at the trailing edge of the blade, and the vortex generator is close to the blade The part with the largest chord length is arranged along the axial direction of the blade.

Correspondingly, the present invention also provides a blade assembly including the above-mentioned vortex-induced vibration suppression device.

The present invention also provides a wind turbine comprising the above-mentioned blade assembly.

Compared with the prior art, the beneficial effects of the present invention are:

The spoiler sleeve provided by the present invention has the function of spoiling the flow, and wrapping the spoiler on the tip of the blade can disturb the vortex near the tip, suppress the vortex-induced vibration near the tip, and cause vortex-induced vibrations that have a greater impact on the blade. The vibration is mostly near the tip of the blade. Therefore, wrapping the spoiler sleeve on the tip of the blade can largely alleviate the problem of the blade resonating due to vortex-induced vibration, so that the blade is not easily damaged due to severe swinging.

It should be noted that the cross-sectional area of the tip portion of the blade gradually decreases from the inner end to the rear end, so the cross-sectional area of the spoiler sleeve is set to gradually decrease from one end to the other end, which can satisfy the wrapping of the spoiler sleeve. The requirements of the blade tip part of the blade; in addition, the cross-sectional area of the spoiler sleeve and the blade tip part gradually decreases from the end near the root of the blade to the tail end of the blade, which is convenient to cover the spoiler sleeve from the tail end of the blade to the blade of the blade. The tip part is also convenient to take off the spoiler cover from the rear end of the blade, so the convenience of putting on and taking off the spoiler cover is improved.

To sum up, the vortex-induced vibration suppression device provided by the present invention can largely alleviate the problem of blade resonance caused by vortex-induced vibration, so that the blade is not easily damaged due to severe swing; in addition, the spoiler sleeve is also easy to put on and take off.

The blade assembly provided by the present invention has the above-mentioned vortex-induced vibration suppression device, so that the blade is not easy to resonate, so that the blade is not easily damaged due to severe swing; in addition, the spoiler sleeve is also easy to put on and take off.

The wind turbine provided by the present invention has all the advantages of the above-mentioned blade assembly because of the above-mentioned blade assembly, and the blades are not easy to resonate, so that the blades are not easily damaged due to serious swing; in addition, the spoiler sleeve is also easy to wear and take off.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

FIG. 1 is a schematic structural diagram of a blade assembly according to an embodiment of the present invention;

2 is a schematic structural diagram of another blade assembly provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the blade assembly provided in the embodiment of the present invention in FIG. 2;

FIG. 4 is a schematic partial structural diagram of the spoiler sleeve provided in the embodiment of the present invention in FIG. 2 .

Description of reference numbers:

100- spoiler cover; 110- strap; 120- net tube; 130- spoiler belt; 140- spoiler block;

200-connection line;

300-vortex-induced vibration detector;

400-leaf; 410-tip; 420-root.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Referring to FIGS. 1 and 2 , the present embodiment provides a vortex-induced vibration suppression device, which includes a spoiler cover 100 , the cross-sectional area of the spoiler cover 100 gradually decreases from one end to the other end, and the spoiler cover 100 uses It is wrapped around the tip portion 410 of the blade 400 .

The spoiler sleeve provided in this embodiment has the function of spoiling the flow, and wrapping it around the tip portion 410 of the blade 400 can disturb the eddy current near the tip portion 410 , suppress the vortex-induced vibration near the tip portion 410 , and reduce the impact on the blade 400 . The most influential vortex-induced vibration is near the tip portion 410. Therefore, wrapping the spoiler sleeve 100 on the tip portion 410 of the blade 400 can largely alleviate the problem of the blade 400 resonating due to the vortex-induced vibration. , and thus, the blade 400 is not easily damaged due to severe swinging.

It should be noted that the cross-sectional area of the tip portion 410 of the blade 400 gradually decreases from the inner end to the rear end, so the cross-sectional area of the spoiler sleeve 100 is set to gradually decrease from one end to the other end, which can satisfy the disturbance The need for the flow jacket 100 to wrap the tip portion 410 of the blade 400; in addition, the cross-sectional areas of the spoiler jacket 100 and the tip portion 410 gradually decrease from the end close to the root of the blade 400 to the tail end of the blade 400, so as to facilitate the flow of the spoiler. The sleeve 100 is sleeved from the rear end of the blade 400 to the tip portion 410 of the blade 400 , and it is also convenient to remove the spoiler sleeve 100 from the rear end of the blade 400 , thus improving the convenience of putting on and taking off the spoiler sleeve 100 .

To sum up, the vortex-induced vibration suppression device provided in this embodiment can largely alleviate the problem that the blade 400 resonates due to the vortex-induced vibration, so that the blade 400 is not easily damaged due to severe swinging; in addition, the spoiler sleeve 100 also Easy to put on and take off.

Specifically, the specific shape and size of the spoiler cover 100 can be set according to the shape characteristics and the thickness-to-chord ratio of the corresponding blade 400 .

Referring to FIG. 1 and FIG. 2 , in the specific structure of the spoiler cover 100, a spoiler body and a strap 110 can be provided, wherein the spoiler body is wrapped around the tip portion 410 of the blade 400 and is the main spoiler component. The strap 110 is connected to the end with the larger cross-sectional area of the spoiler body. After the spoiler sleeve 100 is put on the blade tip 410, the strap 110 is fastened on the blade 400, and the spoiler jacket 100 can be fixed. In the current position, it will not slip; when the spoiler cover 100 needs to be taken off, the strap 110 can be loosened, and then the spoiler cover 100 can be taken off from the rear end along the blade 400, which is very convenient.

In the specific structure of the vortex-induced vibration suppression device provided in this embodiment, a connecting wire 200 and a driver can also be provided, the driver is installed on the blade 400, one end of the connecting wire 200 is connected to the driver, and the other end of the connecting wire 200 is connected to the driver. Connect with the loose end of the strap 110.

When the spoiler cover 100 needs to be taken off, the driver can be activated, and the connecting wire 200 can be shortened by the driver to pull the strap 110 to loosen; after the strap 110 is loosened, although the spoiler cover 100 is no longer tied It is tight on the blade 400, but will not fall directly under the action of the connecting wire 200. At this time, the driver can be used to drive the connecting wire 200 to lengthen. During the lengthening process of the connecting wire 200, the spoiler cover 100 will slowly When falling, stop the driver after the spoiler cover 100 slides to the ground or a preset height. At this time, the staff can put away the spoiler cover 100. If the spoiler cover 100 is not damaged, it can continue to be used.

It should be noted that, through the action of the connecting wire 200, the spoiler cover 100 is slowly slipped, which can prevent the spoiler cover 100 from smashing the underground personnel, thereby improving the safety, and the process of taking off the spoiler cover 100 is highly automated. , which can save manpower; in addition, the spoiler cover 100 can continue to be used, which can save costs.

In the vortex-induced vibration suppression device provided in this embodiment, a vortex-induced vibration detector 300 and a controller may also be provided, the vortex-induced vibration detector 300 and the controller are electrically connected, and the vortex-induced vibration detector 300 is installed on the blade 400 In the above, the vortex-induced vibration detector 300 is used to detect the vortex-induced vibration signal of the blade 400, and the controller is made to acquire the vibration signal detected by the vortex-induced vibration detector 300.

The controller can be electrically connected to the above-mentioned driver, and when the controller determines that the obtained vortex-induced vibration signal of the blade 400 is less than or equal to the preset signal, it can first control the driver to drive the connecting wire 200 to shorten, and after the strap 110 is loosened , and then control the driver to drive the connecting wire 200 to lengthen until the spoiler cover 100 slides down to the ground or a preset height.

An alarm can also be added, and the alarm is electrically connected to the controller. When the controller determines that the obtained vortex-induced vibration signal of the blade is greater than the preset alarm threshold signal, the alarm is controlled to alarm and remind the staff to install the spoiler cover. 100, preventing further damage to the blade 400.

Preferably, the vortex-induced vibration detector 300 can be installed on the root end 420 of the blade 400 , so that the vortex-induced vibration detector 300 cannot easily affect the overall profile of the blade 400 .

The vortex-induced vibration detector 300 described above may be a vibration sensor.

The spoiler cover 100 can be set to any one of the following two specific structures:

First, referring to FIG. 1 , a mesh cylinder 120 is provided in the specific structure of the spoiler sleeve 100, and the mesh cylinder 120 is sleeved on the tip portion 410 of the blade 400. The mesh cylinder 120 can improve the roughness of the surface of the blade 400, and realize the flow effect, reducing the probability of vortex-induced vibration.

Specifically, the material of the mesh cylinder 120 can be set to nylon or cloth, which has certain flexibility and can be adaptively changed according to the actual shape of the blade 400 , which is easy to wear and take off, and is not easy to scratch the blade 400 .

The mesh shape of the mesh cylinder 120 can be set as a polygon, such as a triangle, a quadrangle, a pentagon, and the like.

In the second type, referring to FIGS. 2-4 , a spoiler strip 130 and a plurality of spoiler blocks 140 are arranged in the specific structure of the spoiler cover 100 , and the multiple spoiler blocks 140 are connected in series on the spoiler strip 130 , and The spoiler strip 130 is spirally wound around the tip portion 410 of the blade 400, and this structure can also achieve a spoiler effect and reduce the probability of vortex-induced vibration.

Specifically, a rope can be used as the spoiler band 130, and the material of the spoiler block 140 can be set to be foam, plastic or light rubber, these light materials can reduce the increased gravity of the blade 400 due to the attachment of the spoiler sleeve 100, and further , reduce the loss of wind energy due to the increase of gravity, and ensure the conversion efficiency of wind energy.

The shape of the spoiler 140 can be set to various shapes such as a cylinder, a polygon (eg, a triangle, a quadrilateral, and a pentagon).

The spoiler blocks 140 may be uniformly arranged along the length direction of the spoiler strip 130 .

The spoiler strips 130 may be provided in several strips, and the several spoiler strips 130 may be evenly arranged along the circumferential direction of the blade 400 .

In particular, the ratio of the length of the spoiler cover 100 to the length of the blade tip portion 410 may be set to 1/3, 3/5 or 2/3.

In addition, a vortex generator can be added to the vortex-induced vibration suppression device provided in this embodiment, and the vortex generator can be installed on the trailing edge of the blade 400, so that the vortex generator is close to the part with the largest chord length of the blade 400, and The vortex generator is arranged along the axial direction of the blade 400 to change the airflow direction by using the vortex generator, thereby reducing the vortex-induced vibration, and the vortex-induced vibration can also increase the power generation during the operation of the wind turbine.

Specifically, the vortex generator can be permanently attached to the blade 400, so that the connection strength between the vortex generator and the blade 400 can be improved, and it is not easy to fall off.

The above-mentioned vortex generator can be made of light-weight and corrosion-resistant materials, so as to reduce the influence on the weight of the blade 400 and ensure a long service life.

This embodiment also provides a blade assembly including the above-mentioned vortex-induced vibration suppression device.

Therefore, in the blade assembly provided in this embodiment, the blade 400 is not easily resonated, so that the blade 400 is not easily damaged due to severe swinging; in addition, the spoiler cover 100 is also easy to put on and take off.

This embodiment also provides a wind turbine, which includes the above-mentioned blade assembly.

Therefore, in the wind turbine provided by this embodiment, the blades 400 are not easily resonated, so that the blades 400 are not easily damaged due to severe swinging; in addition, the spoiler cover 100 is also easy to put on and take off.

To sum up, the embodiments of the present invention disclose a vortex-induced vibration suppression device, a blade assembly and a wind turbine, which overcome many technical defects of blades of a conventional wind turbine. The vortex-induced vibration suppression device, the blade assembly, and the wind turbine provided by the embodiments of the present invention can largely alleviate the problem of the blade resonating due to the vortex-induced vibration, so that the blade 400 is not easily damaged due to severe swinging; The sleeve 100 also facilitates donning and doffing.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A vortex-induced vibration suppression device, characterized in that it comprises a spoiler sleeve (100), the cross-sectional area of the spoiler jacket (100) gradually decreases from one end to the other end, and the spoiler jacket (100) 100) is used to wrap around the tip portion (410) of the blade (400). 2. The vortex-induced vibration suppression device according to claim 1, wherein the spoiler sleeve (100) comprises a spoiler body and a strap (110), and the spoiler body is used to wrap the blade (110). 400) of the blade tip (410), the strap (110) is connected to the end of the spoiler body with a larger cross-sectional area, and the strap (110) is used to fasten the blade (110). 400), the spoiler cover (100) can fall off after the strap (110) is released. 3. The vortex-induced vibration suppression device according to claim 2, characterized in that, the vortex-induced vibration suppression device further comprises a connecting wire (200) and a driver, and the driver is used for being mounted on the blade (400) , one end of the connecting wire (200) is connected to the driver, the other end of the connecting wire (200) is connected to the loose end of the strap (110), and the driver is used to shorten or lengthen the The connecting wire (200) can be pulled to loosen the strap (110) when the connecting wire (200) is shortened. The vortex-induced vibration suppression device according to claim 3, characterized in that, the vortex-induced vibration suppression device further comprises a vortex-induced vibration detector (300) and a controller, the vortex-induced vibration detector (300) electrically connected with the controller, the vortex-induced vibration detector (300) is installed on the blade (400), and the vortex-induced vibration detector (300) is used to detect the vortex-induced vibration signal of the blade (400); The controller is electrically connected to the driver, and the controller is used to control the operation of the driver; and/or the vortex-induced vibration suppression device further includes an alarm, and the alarm is electrically connected to the controller , the controller is used to control the alarm to give an alarm. 5. The vortex-induced vibration suppression device according to any one of claims 1-4, wherein the spoiler sleeve (100) comprises a mesh cylinder (120), and the mesh cylinder (120) is used to be sleeved on the a tip portion (410) of the blade (400); Or, the spoiler sleeve (100) includes a spoiler strip (130) and a plurality of spoiler blocks (140), and a plurality of the spoiler blocks (140) are connected in series with the spoiler strip (130), so The spoiler strip (130) is spirally wound around the tip portion (410) of the blade (400). 6. The vortex-induced vibration suppression device according to claim 5, wherein the mesh cylinder (120) is made of nylon or cloth; Or, the spoiler strip (130) is a rope, and the spoiler block (140) is made of foam, plastic or light rubber. 7. The vortex-induced vibration suppression device according to any one of claims 1-4, wherein the ratio of the length of the spoiler sleeve (100) to the length of the blade tip (410) is 1/ 3, 3/5 or 2/3. 8. The vortex-induced vibration suppression device according to any one of claims 1-4, wherein the vortex-induced vibration suppression device further comprises a streamlined vortex generator, the vortex generator is used to be installed on the blade At the trailing edge portion of (400), the vortex generator is close to the portion where the chord length of the blade (400) is the largest and is arranged along the axial direction of the blade (400). 9. A blade assembly, characterized by comprising the vortex-induced vibration suppression device according to any one of claims 1-8. 10. A wind turbine, comprising the blade assembly of claim 9.

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