阅读说明：本技术 一种收缩式风力发电机组柔性塔架风致振动扰流装置 (flexible tower wind-induced vibration flow disturbing device of retractable wind generating set ) 是由 罗勇水 卓沛骏 陈棋 应有 李陈 于 2019-09-18 设计创作，主要内容包括：一种收缩式风力发电机组柔性塔架风致振动扰流装置,旨在解决现有技术中当风力发电机组处于停机状态时,柔性塔架结构易受涡激振动危害,以及现有的用于抑制涡激振动的扰流装置在风力发电机组正常工作时长期受风载疲劳损伤的技术问题。本发明包括与地面固定连接的基础,基础上安装有塔架,塔架远离地面的一端安装有机舱,机舱上装有用以安装叶片的轮毂,塔架的外表面上装有呈螺旋状分布的扰流装置,扰流装置的扰流板与塔架外表面之间的夹角可通过驱动构件进行调节。本发明具有如下有益效果：(1)扰流装置有效抑制涡激振动；(2)处于闭合状态的扰流装置不会影响机组运行和发电,在降低扰流装置受风载疲劳损伤的同时解决了塔架外载、噪音问题。(flexible tower wind-induced vibration turbulence device of a retractable wind generating set, which aims to solve the technical problems that the structure of the flexible tower is easily damaged by vortex-induced vibration when the wind generating set is in a shutdown state in the prior art, and the conventional turbulence device for inhibiting the vortex-induced vibration is damaged by wind-load fatigue during the normal operation of the wind generating set.)

The utility model provides a flexible pylon wind-induced vibration vortex device of contraction type wind generating set, include with ground fixed connection's basis, its characterized in that, install the pylon on the basis, the end that the pylon kept away from ground installs the cabin, is equipped with the wheel hub that is used for installing the blade on the cabin, is equipped with the vortex device that is the heliciform and distributes on the surface of pylon, and the contained angle accessible drive component between the vortex plate of vortex device and the pylon surface is adjusted.

2. The flexible tower wind-induced vibration spoiler device of retractable wind turbine generator system according to claim 1, wherein the spoiler device further comprises a spoiler bottom plate, the spoiler bottom plate in the shape of an arc plate is attached to the outer surface of the tower, the spoiler can be completely attached to the end surface of the spoiler bottom plate away from the tower under the driving of the driving member, and the end surface of the spoiler bottom plate away from the tower is formed with a mounting portion for mounting the spoiler.

3. The flexible tower wind-induced vibration spoiler device of retractable wind turbine generator system according to claim 2, wherein a duct channel for accommodating a duct and a pin channel for accommodating a pin are respectively formed on an end surface of the spoiler base plate away from the tower, an end of the duct channel penetrates through a side plane of the spoiler base plate, another of the duct channel penetrates through the pin channel, a second mounting portion for mounting the pin is formed at an end of the pin channel close to the duct channel, and a side wall of the pin is connected to the driving member through a duct.

4. The flexible tower wind-induced vibration spoiler device of the retractable wind generating set, wherein the installation axis of the installation part is parallel to the height direction of the tower, the spoiler is rotatably connected with the installation part, the concave arc surface of the spoiler, which is close to the spoiler bottom plate, is provided with a third installation part, and the end of the ejector rod, which is far away from the second installation part, is rotatably connected with the third installation part.

5. The flexible tower wind-induced vibration spoiler device of the retractable wind generating set, wherein the duct is an air or oil pipe, and the driving member connected with the duct is an air compressor or a hydraulic pump.

6. The flexible tower wind-induced vibration spoiler device of the retractable wind generating set, which is characterized in that the tower comprises a tower I, a tower II, a tower III, a tower IV and a tower V from the ground to the top in sequence, and the spoiler device is fixedly arranged on the outer surfaces of the tower III, the tower IV and the tower V.

7. The flexible tower wind-induced vibration spoiler device of the retractable wind generating set, wherein the spoiler device comprises spiral belts, a second spiral belt and a third spiral belt, each spiral belt has a pitch of 3.6-5 times of the tower diameter, and the height of the spoiler when the spoiler is perpendicular to the outer surface of the tower is 0.1-0.12 times of the tower diameter.

8. The flexible tower wind-induced vibration spoiler device of the retractable wind turbine generator system, wherein the spoiler base plate can be fixedly connected to the tower by means of magnets, welding or nails.

9. The flexible tower wind-induced vibration spoiler device of the retractable wind turbine generator system, wherein the spoiler and the third mounting portion can be made of glass fiber reinforced plastic body molding or iron sheet welding.

Technical Field

The invention relates to the field of wind power generation, in particular to a flexible tower wind-induced vibration flow disturbing device of retractable wind generating sets.

Background

The flexible tower is a main solution of a high tower unit, and compared with a transmission rigid tower, the flexible tower has the characteristics of small structural rigidity and low structural inherent frequency, however, for the current mainstream cylindrical or conical tower, when the unit is in a shutdown state, the wind-induced vibration with the greatest harm to the tower is vortex-induced vibration, specifically, when the airflow passes through the tower with a circular cross section, an asymmetric cross arrangement laminar flow street is formed behind an object, the alternately issued vortex generates pulsating pressure with periodically changed forward flow direction and cross flow direction on a cylinder, and the pulsating fluid force causes the periodic vibration of the tower due to the fact that the flexible tower allows the occurrence of the periodic vortex shape, the regular vibration of the tower can change the vortex issuing form of the wake flow, if the self-vibration frequency of the tower is close to the issuing frequency of the vortex, the self-induced vibration frequency of the tower in the conventional technology is changed to be close to the tail vibration frequency of the tower, the tail vibration frequency of the tower is changed, and the tail vibration frequency of the tower is changed to be close to the tail vibration frequency of the tower, and the tail vibration frequency of the tower is changed, and the tail vibration reinforcing measures such as a tail vibration reinforcing measure for the tail of the tower, and the tail vibration of the tower are changed.

The application number is CN 201821114263.5's chinese patent discloses can restrain vortex induced vibration's wind power generation tower section of thick bamboo vortex strip, including vortex strip main part, the vortex strip main part is encircleed on wind power generation tower section of thick bamboo's outer wall, vortex strip main part includes vortex suppression piece and second vortex suppression piece, and the lower extreme of vortex suppression piece is fixed with second nylon rope, the inside cup joint of second vortex suppression piece is connected with the connecting rod, and the right-hand member of connecting rod is connected with the metal clamping piece joint, the through-hole has all been seted up on connecting rod and the metal clamping piece, and the fixed axle cup joints with the mounting and is connected to the through-hole, the right-hand member welding of metal clamping piece has metal ring, and detains the fixed connection through the snak between the metal ring.

However, when the generator set is in normal operation and generates electricity, the spoiler is subjected to wind load fatigue damage for a long time, the service life of the spoiler is greatly shortened in the aspect of , and in addition, the problems of tower external load, noise and the like are increased in the aspect of .

Disclosure of Invention

The invention provides flexible tower wind-induced vibration flow disturbing devices of a retractable wind generating set, aiming at overcoming the technical problems that a flexible tower structure is easily damaged by vortex-induced vibration when a wind generating set is in a shutdown state in the prior art and the conventional flow disturbing devices for inhibiting the vortex-induced vibration are damaged by wind-borne fatigue during the normal working period of the wind generating set.

In order to achieve the above object, the present invention adopts the following technical solutions.

flexible pylon wind-induced vibration vortex device of contraction type wind generating set, include with ground fixed connection's basis, install the pylon on the basis, the end that the ground was kept away from to the pylon installs the cabin, is equipped with the wheel hub that is used for installing the blade on the cabin, is equipped with the vortex device that is the heliciform and distributes on the surface of pylon, and the contained angle accessible drive component between the vortex device's spoiler and the pylon surface is adjusted.

Based on the requirements of light weight and production cost, a flexible tower is usually adopted for a tower of a wind generating set at present, when air flows through the tower with a circular cross section, laminar vortex streets which are arranged in an asymmetric and crossed mode are formed behind an object, pulsating pressure which changes along the flow direction and along the flow direction periodically is generated by alternately distributed vortices on a column body, and as the flexible tower allows generation of a flexible vortex pattern, the periodic vibration of the tower is caused by the pulsating fluid force, the vortex distribution pattern of wake flow is changed by the regular column vibration, and when the self-vibration frequency of the tower is close to the distribution frequency of the vortices, the tower is damaged due to resonance.

Preferably, the spoiler device further comprises a spoiler bottom plate, the spoiler bottom plate in an arc plate shape is attached to the outer surface of the tower, the spoiler can be completely attached to the end face, far away from the tower, of the spoiler bottom plate under the driving of the driving member, and an -th installation part for installing the spoiler is formed on the end face, far away from the tower, of the spoiler bottom plate.

In the invention, the turbulence bottom plate is used for fixing the turbulence plate, so that the influence of the turbulence bottom plate on the normal operation and power generation of the unit is weakened as much as possible, the arc-shaped turbulence bottom plate is attached to the outer surface of the tower, when the unit is in a normal working state, the turbulence plate can be completely attached to the end surface of the turbulence bottom plate, which is far away from the tower, under the driving of the driving member, and the airflow disturbed by the blades is hardly blocked at the position of the turbulence device, so that the influence of the turbulence device on the normal operation and power generation of the unit is weakened to the maximum extent.

Preferably, a pipeline groove used for accommodating a pipeline and a mandril groove used for accommodating a mandril are respectively formed in the end face, far away from the tower, of the turbulence bottom plate, the end of the pipeline groove penetrates through the side plane of the turbulence bottom plate, the other end of the pipeline groove is communicated with the mandril groove, a second mounting portion used for mounting the mandril is arranged at the end, close to the pipeline groove, of the mandril groove, and the side wall of the mandril is connected with the driving component through the pipeline.

According to the vortex flow breaking device, the included angle between the spoiler and the outer peripheral surface of the tower is adjusted through the ejector rod, the ejector rod is connected with the driving component through the pipeline, when the vortex flow breaking device works, the driving component drives the ejector rod to rise so as to support the spoiler to rotate away from the spoiler bottom plate, the breaking strength of the vortex flow which periodically falls off by the vortex flow breaking device depends on the included angle between the spoiler and the outer peripheral surface of the tower, when the included angle is 0 degree, the breaking strength of the vortex flow which periodically falls off by the vortex flow breaking device is minimum, and when the included angle is 90 degrees, the breaking strength of the vortex flow breaking device on the vortex flow; when the turbulent flow device does not work, the driving component drives the ejector rod to descend and further pulls the turbulent flow plate to rotate to be close to the turbulent flow bottom plate, when the ejector rod is completely brought into the ejector rod groove, the turbulent flow plate is completely attached to the turbulent flow bottom plate, and the turbulent flow device cannot influence the normal operation power generation of the unit.

Preferably, the mounting axis of the th mounting part is parallel to the height direction of the tower, the spoiler is rotatably connected with the th mounting part, the concave arc surface of the spoiler, which is close to the spoiler bottom plate, is provided with a third mounting part, and the end of the ejector rod, which is far away from the second mounting part, is rotatably connected with the third mounting part.

When air flows through the tower with a circular cross section, laminar vortex streets which are arranged in an asymmetric crossed mode are formed behind an object, which is the premise of generating vortex-induced vibration, so that a vortex which periodically drops is damaged by the turbulence device, the circumferential flow of the air along the tower needs to be blocked by the turbulence plate, in order to meet the requirement, the installation axis of the installation part is parallel to the height direction of the tower, the step is further performed, the third installation part is arranged on the concave arc surface of the turbulence plate close to the turbulence bottom plate, and the end, far away from the second installation part, of the ejector rod is connected with the third installation part in a rotating mode.

Preferably, the pipeline is an air pipe or an oil pipe, and the driving component connected with the pipeline is an air compressor or a hydraulic pump.

The ejector rod is driven by air pressure or hydraulic pressure, and the stability of the movement process of the ejector rod is higher; when the ejector rod is put into the ejector rod groove, the air compressor or the hydraulic pump locks the ejector rod, so that the ejector rod is prevented from being opened in the working process of the unit.

Preferably, the tower comprises a tower I, a tower II, a tower III, a tower IV and a tower V in sequence from the ground to the top, and the turbulence device is fixedly arranged on the outer surfaces of the tower III, the tower IV and the tower V.

The air flow near the ground surface is anisotropic due to the mixing of cold air and hot air, when air flows through the circular tower with the cross section and forms an asymmetric cross arrangement laminar flow vortex street behind, the laminar flow vortex street is quickly damaged by other air flows, so that the tower is hardly subjected to vortex-induced vibration near the ground surface, and the air flow far away from the ground surface is substantially isotropic due to the single nature of the cold air, and the laminar flow vortex street is not substantially damaged by the air flow, so that the position is the main working position of the turbulence device.

Preferably, the spoiler comprises an th spiral belt, a second spiral belt and a third spiral belt, the thread pitch of each spiral belt is 3.6-5 times of the diameter of the tower, and the height of the spoiler when the spoiler is perpendicular to the outer surface of the tower is 0.1-0.12 times of the diameter of the tower.

The technical scheme limits the arrangement of the spiral turbulence devices, according to the design theory of wind-induced vibration of high-rise buildings, the pitch of each spiral belt is 3.6-5 times of the diameter of the tower, and the height of the turbulence plates when the turbulence plates are perpendicular to the outer surface of the tower is 0.1-0.12 times of the diameter of the tower.

Preferably, the turbulence base plate can be fixedly connected with the tower frame through a magnet, welding or nail shooting mode.

The fixing mode of the turbulence bottom plate and the tower is limited by the technical scheme, and the turbulence bottom plate and the tower can be magnetically connected, welded or fixed through a nail.

Preferably, the spoiler and the third mounting part may be made of a body-formed glass reinforced plastic or welded iron pieces.

The technical scheme limits the preparation materials of the spoiler and the third installation part, and particularly, the spoiler and the third installation part can be prepared by body molding or iron sheet welding.

In conclusion, the invention has the following beneficial effects: (1) the turbulence devices are spirally arranged on the outer peripheral surface of the tower, and the spirally distributed turbulence devices destroy the regular discharge of the vortex in the wake field, so that vortex-induced vibration is effectively inhibited; (2) the flow disturbing device in a closed state cannot influence the normal operation and power generation of the unit, and the problems of tower external load, noise and the like are solved while the fatigue damage of the flow disturbing device caused by wind load is reduced; (3) when the driving component drives the spoiler to be vertical to the outer peripheral surface of the tower, the spoiler can effectively destroy periodically falling vortex and effectively inhibit vortex-induced vibration.

Drawings

Fig. 1 is a schematic view of structures of the whole of the present invention.

Fig. 2 is another schematic structural diagrams of the present invention as a whole.

FIG. 3 is a schematic structural view of the spoiler base plate, the spoiler, the carrier rod and the pipe according to the present invention.

FIG. 4 is a schematic structural view of the spoiler base plate and the carrier rod according to the present invention.

Fig. 5 is a schematic structural view of a spoiler panel according to the present invention.

FIG. 6 is a schematic view of a flow perturbation device according to the present invention.

In the figure:

1. the wind power generation device comprises a foundation, 2, a tower, 21, towers I and 22, towers II and 23, towers III and 24, towers IV and 25, towers V and 3, a cabin, 4, blades, 5, hubs, 6, a turbulence device, 6a, th spiral belts, 6b, second spiral belts, 6c, third spiral belts, 61, a spoiler, 611, a third mounting part, 62, a spoiler bottom plate, 621, mounting parts, 622, a pipeline groove, 623, a mandril groove, 624, a second mounting part, 7, a driving component, 8, a pipeline, 9 and a mandril.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are used to mean, for example, either fixedly or removably connected or physically connected, mechanically or electrically connected, directly or indirectly connected through an intermediary, or communicating between two elements.