阅读说明：本技术 一种风力发电机新型塔架结构 (Novel tower structure of wind driven generator ) 是由 吕冠涛 刘祥 梅新宇 樊永安 张佳 吴东垠 于 2020-12-16 设计创作，主要内容包括：本发明公开了一种风力发电机新型塔架结构,包括控制柜、液压伸缩底座、液压伸缩推杆、机舱、轮毂、叶轮。液压伸缩底座固定在地面上,控制柜和液压伸缩底座连接,控制液压伸缩推杆的升降,机舱与液压伸缩推杆焊接,叶轮焊接在轮毂上,轮毂与机舱连接,机舱可将环境风速传递至控制柜,控制柜可以根据风速,调节液压伸缩推杆。本发明通过改变塔架高度来改变风轮的能量捕获,使风轮转速保持在额定值附近,同时可以避免风速过大对设备的损害,增加设备寿命。(The invention discloses a novel tower structure of a wind driven generator, which comprises a control cabinet, a hydraulic telescopic base, a hydraulic telescopic push rod, a cabin, a hub and an impeller. The hydraulic telescopic base is fixed on the ground, the control cabinet is connected with the hydraulic telescopic base, the lifting of the hydraulic telescopic push rod is controlled, the engine room is welded with the hydraulic telescopic push rod, the impeller is welded on the hub, the hub is connected with the engine room, the ambient wind speed can be transmitted to the control cabinet by the engine room, and the hydraulic telescopic push rod can be adjusted by the control cabinet according to the wind speed. The invention changes the energy capture of the wind wheel by changing the height of the tower, so that the rotating speed of the wind wheel is kept near a rated value, the damage of overlarge wind speed to equipment can be avoided, and the service life of the equipment is prolonged.)

1. A novel tower structure of a wind driven generator is characterized in that: the hydraulic telescopic structure of the tower comprises a control cabinet (1), a hydraulic telescopic base (2), a hydraulic telescopic push rod (3), a cabin (4), a hub (5), an impeller (6) and a wind speed measuring device (7).

2. The novel tower structure of the wind power generator as claimed in claim 1, wherein: the hydraulic telescopic base (2) and the control cabinet (1) are fixed on the ground, and the control cabinet (1) and the hydraulic telescopic base (2) are connected and control the lifting of the hydraulic telescopic push rod (3).

3. The novel tower structure of the wind power generator as claimed in claim 1, wherein: cabin (4) and hydraulic telescoping push rod (3) welding, impeller (6) welding are on wheel hub (5), wheel hub (5) are connected with cabin (4), and cabin (4) surface sets up wind speed measuring device (7), and cabin (4) also are connected with switch board (1) simultaneously, can transmit wind speed to switch board (1).

Technical Field

The invention relates to the technical field of wind power generation equipment, in particular to a tower structure of a wind driven generator.

Background

With the requirement of human beings on the ecological environment and the requirement of energy, the development of wind energy is increasingly emphasized, and wind power generation becomes a renewable clean energy source developed on a large scale in the 21 st century. Wind energy, one of the renewable energy sources, is quite abundant in China. With the continuous improvement of people's understanding of wind power generation and the continuous maturity of small-sized wind power generation technology, the application field is wider and wider.

The wind power generator is a power generation device which converts wind energy in the nature into electric energy. The wind generating set works in a certain wind speed range, and in many cases, the rotating speed of the wind turbine is required to be kept constant or not to exceed a certain limit value no matter how the wind speed changes. After the wind generating set exceeds the rated wind speed, due to the limitation of mechanical strength, generator, power electronic capacity and other physical properties, the energy capture of a wind wheel must be reduced, the load borne by the blades and the impact received by the whole wind turbine are reduced, the power output is kept near the rated value, and the wind turbine is ensured not to be damaged.

The tower is a supporting structure of the wind driven generator and is an indispensable part of the wind driven generator set. The tower is designed and manufactured according to the stress condition of the wind generating set during working, and has high wind resistance. Wind shear is a phenomenon of the atmosphere that reflects the variation of wind speed with altitude. In different regions, the wind shear indexes at different times are different and need to be determined through data acquisition calculation. Wind shear is typically calculated using the following formula:

wherein α represents a wind shear index; z is a radical of₁Represents the height of any point (e.g., 25 m); z is a radical of₂Represents the height of any point (e.g., 40 m); v. of₁Is shown at height z₁The wind speed of (d); v. of₂Is shown at height z₂The wind speed of (c). For the same wind turbine, the higher the tower height, the higher the wind speed, all other things being equal.

Disclosure of Invention

In order to overcome the defects of the existing speed regulating device, the invention provides a novel tower structure of a wind driven generator, which is novel in structure and simple in production process.

In order to solve the technical problems, the invention adopts a technical scheme that:

a novel tower structure of a wind driven generator is characterized in that: the hydraulic telescopic structure of the tower comprises a control cabinet 1, a hydraulic telescopic base 2, a hydraulic telescopic push rod 3, a cabin 4, a hub 5, an impeller 6 and a wind speed measuring device 7.

The hydraulic telescopic base 2 and the control cabinet 1 are both fixed on the ground, the control cabinet 1 and the hydraulic telescopic base 2 are closely arranged and connected through a data line, and the control cabinet 1 controls the lifting of the hydraulic telescopic push rod 3. The control cabinet 1 comprises a processor, an actuator and the like, when the wind speed exceeds or is lower than a rated value set by the control cabinet 1, the control cabinet 1 can control the extension and retraction of the hydraulic telescopic push rod 3 on line according to the size of the wind speed, so that the height of the tower is adjusted, the lowest height of the tower is fifty percent of the highest height, the heights of the fan impellers 6 are different, the ambient wind speeds are different, and the power of the wind driven generator is changed.

Cabin 4 and the welding of hydraulic stretching push rod 3, impeller 6 welding are on wheel hub 5, and wheel hub 5 is connected with cabin 4, and the connected mode is wind-powered electricity generation field conventional connected mode, and cabin 4 also passes through the data line with switch board 1 simultaneously and is connected, has wind speed measuring device 7 on cabin 4, can pass through the data line with the wind speed and transmit to switch board 1.

The control cabinet 1 can control the extension and retraction of the hydraulic telescopic push rod 3 on line according to the ambient wind speed, and further adjust the height of the tower. For the wind shear indexes of different regions in different periods, the wind shear indexes are determined by data acquisition and calculation before the wind driven generator is installed, and then the control cabinet 1 is determined according to the current wind shear index and the wind speed at the current height according to a formula:

and calculating the height corresponding to the set wind speed. If the wind speed deviates from the design value, the program for controlling the expansion and contraction of the hydraulic telescopic push rod 3 on line is split, and the expansion and contraction of the hydraulic telescopic push rod 3 are controlled on line according to the wind speed.

The invention has the beneficial effects that:

the invention relates to a novel tower structure of a wind driven generator, which adjusts the wind speed received by an impeller by changing the height of the tower, changes the energy capture of a wind wheel and keeps the rotating speed of the wind wheel close to a rated value. Meanwhile, when the wind speed is too high, the height is reduced, the load borne by the blades and the impact received by the whole wind turbine can be reduced, the wind turbine is prevented from being damaged, and the service life of the wind driven generator is prolonged.

Drawings

FIG. 1 is a structural view of a novel tower of a wind turbine according to the present invention;

FIG. 2 is a graph of wind speed versus altitude;

Detailed Description

The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.

The invention relates to a novel tower structure of a wind driven generator, which is characterized in that: the hydraulic telescopic structure of the tower comprises a control cabinet 1, a hydraulic telescopic base 2, a hydraulic telescopic push rod 3, a cabin 4, a hub 5, an impeller 6 and a wind speed measuring device 7.

As a preferred embodiment of the present invention, as shown in fig. 1, the hydraulic telescopic base 2 and the control cabinet 1 are both fixed on the ground, the control cabinet 1 and the hydraulic telescopic base 2 are closely arranged and connected by a data line, and the control cabinet 1 controls the lifting of the hydraulic telescopic push rod 3. The control cabinet 1 comprises a processor, an actuator and the like, when the wind speed exceeds or is lower than a rated value set by the control cabinet 1, the control cabinet 1 can control the hydraulic telescopic push rod 3 to stretch on line according to the wind speed, so that the height of the tower is adjusted, the heights of the fan impellers 6 are different, the ambient wind speeds are different, and the power of the wind driven generator is changed.

Cabin 4 and the welding of hydraulic stretching push rod 3, impeller 6 welding are on wheel hub 5, and wheel hub 5 is connected with cabin 4, and the connected mode is wind-powered electricity generation field conventional connected mode, and cabin 4 also passes through the data line with switch board 1 simultaneously and is connected, has wind speed measuring device 7 on cabin 4, can pass through the data line with the wind speed and transmit to switch board 1.

The control cabinet 1 can control the extension and retraction of the hydraulic telescopic push rod 3 on line according to the ambient wind speed, so as to adjust the height of the tower, for the wind shear indexes of different regions in different periods, the wind shear indexes need to be determined through data acquisition and calculation before the wind driven generator is installed, the relation between the height and the wind speed is roughly shown in a graph shown in figure 2, and the control cabinet 1 can adjust the height of the tower according to the formula according to the current wind shear index and the current wind speed of the current height:

and calculating the corresponding heights of different wind speeds, and adjusting the required heights according to the setting. If the wind speed deviates from the design value, the program for controlling the expansion and contraction of the hydraulic telescopic push rod 3 on line is split, and the expansion and contraction of the hydraulic telescopic push rod 3 are controlled on line according to the wind speed.

In conclusion, the wind speed received by the impeller is adjusted by changing the height of the tower, and the energy capture of the wind wheel is changed, so that the rotating speed of the wind wheel is kept near a rated value. Meanwhile, when the wind speed is too high, the height is reduced, the load borne by the blades and the impact received by the whole wind turbine can be reduced, the wind turbine is prevented from being damaged, and the service life of the wind driven generator is prolonged.