阅读说明：本技术 一种用于大型风电机塔架内部的单摆式减振装置 (Single-pendulum type vibration damping device used inside large wind turbine tower ) 是由 丁振宇 宋家辉 高增梁 刘和坤 郭礼建 柴洪亮 管陈峰 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种用于大型风力发电机塔状筒体内部的单摆式TMD减振器装置,装置包括顶部支架,质量块,粘滞性阻尼器。所述的顶部支架共四个,均匀的分布在筒体内部来固定悬挂质量块；所述质量块配有承重环；所述质量块的下半球上有凹槽,便于钢丝绳绕过悬吊；所述的粘滞性阻尼器共四个,均匀的分布在每个支架之间的下方,轴线与承重环的水平轴线在一条水平线上,可以起到耗散能量和限制质量块产生较大位移的作用。当塔状筒体因为外部激励而产生晃动时,依靠单摆式TMD的设计,无论从哪个方向产生的晃动,该装置都能产生始终与结构相反的摆动,产生反作用力于主结构上,从而控制结构的振动,并通过粘滞性阻尼器达到耗能减振的目的。(The invention discloses a single pendulum TMD (tuned mass damper) device used in a tower-shaped cylinder of a large wind driven generator. The top supports are four in number and are uniformly distributed in the cylinder body to fix and suspend the mass blocks; the mass block is provided with a bearing ring; a groove is formed in the lower hemisphere of the mass block, so that the steel wire rope can conveniently bypass the suspension; the four viscous dampers are uniformly distributed below each support, and the axes of the four viscous dampers and the horizontal axis of the bearing ring are on the same horizontal line, so that the four viscous dampers can play roles in dissipating energy and limiting the mass block to generate large displacement. When the tower-shaped cylinder body shakes due to external excitation, the device can always swing in the opposite direction to the structure no matter which direction the tower-shaped cylinder body shakes due to the design of the single pendulum TMD, and a reaction force is generated on the main structure, so that the vibration of the structure is controlled, and the purposes of energy consumption and vibration reduction are achieved through the viscous damper.)

1. The utility model provides a single pendulum formula TMD vibration damper for large-scale wind turbine tower is inside, includes that the equipartition is at inside top support, quality piece (2), wire rope (9), viscous damper (11) of tower body (1), its characterized in that: the top support comprises a support base plate (4), a support rib plate (3), a support baffle plate (5), a rib plate (6), a top plate (7) above and a baffle plate (8) at the front end; support backing plate (4) are through welded connection tower body (1) and support gusset (3), support baffle (5) are connected with support gusset (3) through the bolt, and gusset (6) link together through welding and support baffle (5), and wire rope (9) are suspended in midair through the bolt of connecting two gusset (6), quality piece (2) are furnished with bearing ring (12), and wire rope (9) pass bearing ring (12) to be equipped with the recess on the lower hemisphere of quality piece (2), this recess is walked around in wire rope (9), viscous damper backing plate (10) of viscous damper (11) one end are connected with tower body (1) through the welding, and the other end is fixed in on bearing ring (12).

2. The single pendulum TMD damping device for large wind turbines according to claim 1, characterized by: the support base plate (4) and the viscous damper base plate (10) are made of the same material as the tower body.

3. The single pendulum TMD damping device for large wind turbines according to claim 2, characterized by: the heights of the support base plate (4) and the viscous damper base plate (10) are higher than the heights of the support rib plate (3) and the damper base connected with the support base plate and the viscous damper base plate.

4. The single pendulum TMD damping device for large wind turbines according to claim 1, characterized by: the welding structure adopts a full penetration welding structure, the inner angle and the outer angle are smooth, MT detection is carried out on a welding line before other parts are welded, and the grade I is qualified.

5. The single pendulum TMD damping device for large wind turbines according to claim 1, characterized by: the number of the bolt holes formed in the support baffle (5) connected with the support rib plate (3) is determined according to the size of the support baffle.

6. The single pendulum TMD damping device for large wind turbines according to claim 1, characterized by: gaps at two sides of the bolt hole suspension steel wire rope of the rib plate (6) are filled with elastic washers.

7. The single pendulum TMD damping device for large wind turbines according to claim 1, characterized by: the four top supports are uniformly distributed around the interior of the tower body; the four viscous dampers are uniformly distributed below each support, and the axes of the four viscous dampers and the horizontal axis of the bearing ring are on the same horizontal line.

Technical Field

The invention relates to the field of vibration reduction control, in particular to a single-pendulum vibration reduction device used in a large wind turbine tower.

Background

Nowadays, the global economy is rapidly developed, the science and technology are continuously improved, but at the same time, the problems of supply shortage and environmental destruction caused by the increasing shortage of energy sources are also accompanied, so that the attention of all countries to renewable and pollution-free energy sources is beginning to be paid. Among various green energy sources, wind energy is one of the renewable energy sources with great prospect potential. However, industrial manufacturing technology is developed in China, and wind energy resources are abundant, so more and more ultrahigh wind driven generators are built. However, the tower-shaped cylinder body of the wind driven generator has the characteristic of high flexibility due to the structural characteristics of the tower-shaped cylinder body, and is sensitive to wind load, analysis shows that in the actual wind load bearing process, transverse wind vibration, namely wind-induced vibration is often much larger than wind vibration, so that the upright column vibrates frequently, fatigue cracks are easily generated on the upright column and the support part due to long-time fatigue load bearing, hidden dangers are brought to the structural integrity of the upright column, and the problem of how to solve the vibration of the upright column is always paid much attention to

From the perspective of traditional structural design methods, vibration control has gradually evolved from a method that relies solely on changing the structure's own properties to resist environmental loads, to a method that relies solely on changing the structure's own properties to resist seismic and wind. The vibration control system actively controls the dynamic response of the structure. The vibration control method commonly used at present mainly comprises methods of vibration elimination, vibration isolation, dynamic vibration absorption, damping vibration attenuation and the like.

The single pendulum Tuned Mass Damper (TMD) mainly comprises a pendulum rope, a mass block and a damper. The working principle is that the pendulum length of the simple pendulum is adjusted to enable the natural vibration frequency of the simple pendulum to be close to the controlled frequency of the main structure, when external force acts on the main structure, the simple pendulum generates movement opposite to the main structure, and reaction force is exerted on the main structure, so that the vibration of the structure is controlled. Most of the single pendulum type dampers are applied to high-rise buildings, the bearing capacity of the top of the wind turbine is not good, the higher the wind turbine generator is, the larger the mass of the corresponding mass block is, and therefore the requirement on the bearing capacity is necessarily put forward.

In order to overcome the defects, the invention provides a single pendulum type vibration damper used in a large wind turbine tower. The invention is based on resonance effect, combines with traditional single pendulum TMD design principle, and can be effectively arranged in the cylinder by designing the top support, so that the cylinder can swing in any direction horizontally, and the vibration control with multiple degrees of freedom is realized.

Disclosure of Invention

The invention aims to provide a single pendulum TMD vibration damper used in a large wind turbine support tower body, which is mainly used for controlling vibration of a high-rise structure and aims to reduce vibration reaction of the high-rise structure under the action of wind vibration and earthquake load so as to achieve the effects of vibration damping and energy consumption. The invention controls the resonance frequency of the TMD vibration damper by adjusting the pendulum length, thereby catering to the natural frequency of the tower equipment structure and further effectively controlling the vibration effect of the structure. The device produces the reaction force on the main structure through producing the swing opposite with the structure all the time to the vibration of control structure, the energy that acts on the main structure dissipates through the attenuator of simple pendulum formula TMD, thereby the control structure is to the vibration reaction of exogenic action.

In order to achieve the purpose, the invention adopts the following technical scheme:

a single pendulum TMD vibration damper used in a large wind turbine tower comprises a top support, a mass block, a steel wire rope and a viscous damper which are uniformly distributed in a tower body, wherein the top support comprises a support base plate, a support rib plate, a support baffle plate, a rib plate, a top plate above the support base plate and a baffle plate at the front end; the support base plate is connected with the tower body and the support rib plate through welding, the support baffle plate is connected with the support rib plate through bolts, the rib plate is connected with the support baffle plate through welding, the steel wire rope is suspended through the bolts for connecting the two rib plates, the mass block is provided with the bearing ring, the steel wire rope penetrates through the bearing ring, a groove is formed in the lower hemisphere of the mass block, the steel wire rope bypasses the groove, the viscous damper base plate at one end of the viscous damper is connected with the tower body through welding, and the other end of the viscous damper base plate is fixed on the bearing ring.

Furthermore, the support base plate and the viscous damper base plate are made of the same material as the tower body.

Furthermore, the heights of the support base plate and the viscous damper base plate are higher than the heights of the support rib plate and the damper base connected with the support base plate and the viscous damper base plate.

Furthermore, the welding structure adopts a full penetration welding structure, the inner angle and the outer angle are smooth, MT detection is carried out on a welding line before other parts are welded, and the grade I is qualified.

Furthermore, the number of the bolt holes formed in the support baffle plate connected with the support rib plate is determined according to the size of the support baffle plate.

Furthermore, gaps at two sides of the bolt hole suspension steel wire rope of the rib plate are filled with elastic washers.

Furthermore, the four top supports are uniformly distributed around the inside of the tower body; the four viscous dampers are uniformly distributed below each support, and the axes of the four viscous dampers and the horizontal axis of the bearing ring are on the same horizontal line.

The device is fixedly suspended in the top of a high-rise structure, under the action of earthquake or wind load, the controlled structure vibrates to drive the mass block to move opposite to the main structure, and reaction force is applied to the main structure, so that the vibration of the structure is controlled, and energy acting on the main structure is dissipated through the damper of the single pendulum TMD, so that the vibration of the structure on the action of external force is controlled. In addition, since the single pendulum TMD can swing in any direction horizontally, vibration control with multiple degrees of freedom can be realized. On the other hand, the resonance frequency of the single pendulum type TMD shock absorber can be effectively controlled by adjusting the pendulum length, and when the frequency of the single pendulum type TMD shock absorber is consistent with the natural frequency of the tower body, the best shock absorption effect is achieved.

The invention has the following beneficial effects:

the invention can adjust the resonance frequency of the vibration damper by adjusting the pendulum length, and the best effect can be achieved when the natural frequency of the tower is close. And the vibration damper has the advantages of simple structure, convenient design and larger frequency regulation range.

Drawings

FIG. 1 is a schematic structural diagram of a pendulum vibration damper for the interior of a large wind turbine tower according to the present invention;

FIG. 2 is a side view of the top bracket part;

fig. 3 is a top view of the entire apparatus.

In the figure: the tower comprises a tower body 1, a mass block 2, a support rib plate 3, a support base plate 4, a support baffle 5, a support baffle 6, a rib plate 7, a top plate 8, a baffle plate 9, a steel wire rope 10, a viscous damper base plate 11, a viscous damper 12 and a bearing ring.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings.

As shown in fig. 1, the single pendulum TMD damping device for the inside of a large wind turbine tower of the present invention is installed around the top of the inside of the tower, and comprises top brackets uniformly distributed at the circumference of an internal tower body 1, wherein each top bracket comprises a bracket backing plate 4 welded to the tower body, a support rib plate 3, a support baffle plate 5, a rib plate 6, a top plate 7 and a baffle plate 8 above and in front of the rib plate 6; the top support is provided with two rib plates 6, and the middle of the two rib plates 6 is connected through a bolt to suspend a steel wire rope 9.

The support baffle 5 is connected with the support rib plate 3 through bolts, the rib plates 6 are connected with the support baffle 5 through welding, and the steel wire rope 9 for suspension is suspended between the two rib plates 6 through bolts and used for suspending the mass block 2.

The mass block 2 is provided with the bearing ring 12, so that the steel wire rope 9 can suspend the mass block 2 more conveniently and effectively through the bearing ring 12, a viscous damper 11 is provided with a supporting point, and a groove is formed in the lower hemisphere of the mass block 2, so that the steel wire rope 9 can bypass suspension conveniently. One end of the viscous damper 11 is connected with a viscous damper backing plate 10 welded on the tower body, and the other end is supported on a bearing ring 12.

As shown in fig. 2 and 3, a top plate 7 is arranged on the rib plate 6; the front end is provided with a baffle 8 for resisting the state of rust caused by dust or leaked water. The number of bolt holes on the support baffle 5 can be set according to actual size by oneself.

The height of the bracket backing plate 4 is higher than that of the rib plate 3, and the height of the support baffle plate 5 is higher than that of the rib plate 6, so that a margin is left for welding.

The viscous dampers 11 are 4 in number and are uniformly distributed below each bracket, and the axes of the viscous dampers and the horizontal axis of the bearing ring are on the same horizontal line, so that the viscous dampers can generate large displacement for limiting the mass block on one hand, and the viscous dampers can dissipate energy generated by a main structure on the other hand.

The device is fixedly suspended in the top of the high-rise structure, the controlled structure vibrates under the action of earthquake or wind load to drive the mass block to move opposite to the main structure, and reaction force is applied to the main structure, so that the vibration of the structure is controlled, energy acting on the main structure is dissipated through the damper of the single pendulum TMD, and the vibration of the structure under the action of external force is controlled to achieve the effect of vibration reduction.

In this embodiment, the length of the wire rope 9, i.e., the pendulum length, and the installation position of the single pendulum TMD damping control device should be determined according to the specific situation of the structure, so as to achieve the best damping effect.

The invention successfully applies the single pendulum TMD to the inside of the tower with the ultrahigh wind power generation price by proposing the design of the single pendulum TMD arranged inside the tower. The traditional single pendulum TMD is mostly applied to high-rise buildings and needs the existence of a suspension platform, but the damping device can be arranged inside the tower-shaped cylinder without an upper fixed platform by designing the top support, and the damping effect of the TMD device is not weakened. The damping device can achieve the due damping effect no matter the vibration of the tower equipment in any direction is caused by external excitation.

The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and any other various modifications, substitutions or alterations made to the above-described structure of the present invention without departing from the basic technical idea of the present invention as set forth in the following claims, and the technical knowledge and conventional means of the field of the present invention will be within the scope of the present invention.