CN108678901A - A kind of H-type vertical axis windmill energy buffer device - Google Patents

Abstract

The invention belongs to the related field of wind power generation technology, and discloses an energy buffer device for an H-type vertical axis wind turbine, which includes an energy buffer unit and a centrifugal speed regulation unit, wherein the energy buffer unit is fitted on a horizontal support bar and can be moved along The slider slides on the horizontal support rod, and the slider is connected to the main shaft through a buffer spring; the centrifugal speed regulating unit includes a fixed sleeve, a middle sleeve and a lower sleeve on the main shaft, and the middle sleeve and the lower sleeve can be moved with the centrifugal The expansion and contraction of the spring slides up and down along the main shaft; the rings covered with heavy objects are respectively connected with the three sleeves, and the baffles connected with the rings are placed at the outer end of the slider to limit the sliding of the slider away from the main shaft. Through the invention, the mutual conversion of the angular momentum of the slider and the wind turbine can be realized, and the output power of the wind turbine can be maintained stable; and the influence of the slider on the start-up performance of the wind turbine can be effectively prevented through the centrifugal speed regulating unit; The advantages of easy installation and wide applicability.

Description

An H-type vertical axis wind turbine energy buffer device

technical field

The invention belongs to the related field of wind power generation technology, and more specifically relates to an energy buffer device for an H-type vertical axis wind turbine.

Background technique

As of the end of 2016, my country's installed capacity of renewable energy power generation has reached 570 million kilowatts, of which the installed capacity of wind power is 149 million kilowatts, accounting for 9.0% of the total installed capacity of electricity. It is an important form of renewable energy power generation. At present, in wind power generation, the technology of horizontal axis wind turbine is mature and occupies most of the market share. However, the research results show that the vertical axis wind turbine is more superior than the horizontal axis wind turbine in many aspects, and it is an important development direction in the field of wind power generation.

Vertical-axis wind turbines can be divided into resistance-type wind turbines and lift-type wind turbines according to different force-bearing methods. The resistance-type wind turbines are low-speed wind turbines, such as S-type, and the lift-type generators are high-speed type, such as H-type and Type D. Among them, the H-type vertical axis wind turbine has the advantages of simple structure, convenient installation and maintenance, no need to face the wind, low noise, strong wind resistance, and good performance at low speed, so it is widely used in small wind turbines. Although the H-type vertical axis wind turbine has many advantages, there are still some unsolved problems that hinder its development to the mainstream model. For example, the traditional H-type vertical axis wind turbine, due to its high blade tip speed, the speed fluctuates greatly with the change of wind speed, resulting in poor output power stability, which is not conducive to wind power grid connection, and is prone to repeated start and stop question.

In the prior art, some solutions have been proposed for the problem of unstable output power of the H-type vertical axis wind turbine. For example, CN201010292326.8 discloses a vertical axis wind turbine, which improves the structure of fan blades, and CN201310117771.4 discloses a variable pitch vertical axis wind turbine, which uses a control system to adjust the pitch of the blades. However, the above-mentioned methods are technically complex and costly, so the applicability is not strong, and it is not conducive to wide application.

Contents of the invention

Aiming at the above defects or improvement needs of the prior art, the present invention provides an energy buffer device for an H-type vertical axis wind turbine, in which the specific structure and setting method of the key components such as the energy buffer unit and the centrifugal speed regulation unit At the same time, it re-designs its overall structural layout, which can effectively improve the start-up performance of the wind turbine while ensuring the stability of the output power of the wind turbine. Therefore, it is especially suitable for various H-type vertical axis wind turbines. manufacturing and applications.

In order to achieve the above object, according to one aspect of the present invention, an energy buffering device for an H-type vertical axis wind turbine is proposed, which is characterized in that it includes an energy buffering unit and a centrifugal speed regulating unit, wherein:

The energy buffer unit includes a slider fitted on the horizontal support rod and sliding left and right along the horizontal support rod, and the slider is connected to the main shaft through a buffer spring;

The centrifugal speed regulating unit includes three sleeves that are sleeved on the main shaft, and along the main shaft from top to bottom are fixed sleeves, middle sleeves and lower end sleeves, wherein the middle sleeve and the lower end sleeve can slide up and down along the main shaft with the expansion and contraction of the centrifugal spring; the collar covered with the weight is respectively connected with the fixed sleeve and the lower end sleeve through the connecting rod, and the collar passes through the The centrifugal spring is connected with the middle sleeve; the baffle connected with the collar is placed at the outer end of the slider, and restricts the slider from sliding along the horizontal support rod away from the main shaft; when the fan starts The baffle prevents the impact on the start-up performance of the wind turbine by restricting the sliding of the slider. After the wind speed increases, the baffle rises higher than the slider, and the slider can slide freely to achieve energy buffering.

As a further preference, there are preferably two buffer springs.

As a further preference, the connecting rod connected to the fixed sleeve and the lower end sleeve has the same length, and the middle sleeve is located in the middle of the fixed sleeve and the lower end sleeve.

As a further preference, the collar is composed of five small rings, wherein the middlemost small ring is connected with the baffle plate, and the other four small rings are connected with the connecting rod, and the small rings can be connected with the weight The object rotates relative to the axis.

As a further preference, the mass of the weight is smaller than that of the slider.

According to another aspect of the present invention, an H-type vertical-axis wind turbine is provided, which is characterized in that the above-mentioned H-type vertical-axis wind turbine energy buffer device is installed.

Generally speaking, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:

1. By setting the energy buffer unit and utilizing the mutual conversion of the slider and the angular momentum of the wind turbine, the present invention can reduce its influence on the speed of the wind turbine under the condition of changing wind speed, and maintain the stability of the output power of the wind turbine;

2. In addition, the present invention can effectively prevent the slider from slipping when the wind turbine is started and affect the start-up performance of the wind turbine by setting the centrifugal speed regulation unit;

3. At the same time, the present invention only adds an energy buffer device on the side of the wind turbine, so it has the advantages of simple manufacture, low cost and easy installation. It can be used for various types of H-type vertical axis wind turbines and has wide applicability.

Description of drawings

Fig. 1 is a front view of a three-bladed H-type vertical-axis wind turbine equipped with an H-type vertical-axis wind turbine energy buffer device provided in an embodiment of the present invention;

Fig. 2 is a left view of a three-blade H-type vertical-axis wind turbine equipped with an H-type vertical-axis wind turbine energy buffer device provided in an embodiment of the present invention;

Fig. 3 is a top view of a three-blade H-type vertical-axis wind turbine equipped with an H-type vertical-axis wind turbine energy buffer device provided in an embodiment of the present invention;

Fig. 4 is three views of the energy buffer unit of the H-type vertical axis wind turbine energy buffer device constructed according to the present invention, wherein Fig. 4a is the front view of the energy buffer unit, and Fig. 4b is the left side view of the energy buffer unit, Fig. 4c is a top view of the energy buffer unit;

Fig. 5 is the front view of the centrifugal speed regulating unit of the H-type vertical axis wind turbine energy buffer device constructed according to the present invention;

Fig. 6 is the left side view of the centrifugal speed regulating unit of the H-type vertical axis wind turbine energy buffer device constructed according to the present invention;

Fig. 7 is the top view of the centrifugal speed regulating unit of the H-type vertical axis wind turbine energy buffer device constructed according to the present invention;

Fig. 8 is three views of the centrifugal speed-regulating weight of the H-type vertical axis wind turbine energy buffer device constructed according to the present invention, wherein Fig. 8a is the front view of the weight, and Fig. 8b is the left side view of the weight, Fig. 8c is a top view of the weight.

In all drawings, the same reference numerals are used to refer to the same elements or structures, in which:

1-fixed sleeve; 2-middle sleeve; 3-lower sleeve; 4-centrifugal spring; 5-connecting rod; 6-collar; 7-baffle; Rod; 10-main shaft; 11-slider; 12-buffer spring; 13-blade.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

Fig. 1, Fig. 2 and Fig. 3 are the structural schematic diagrams of the three-blade H-type vertical-axis wind turbine installed with the H-type vertical-axis wind turbine energy buffer device provided in the embodiment of the present invention, as shown in Fig. 1, Fig. 2 and Fig. 3 As shown, the H-type vertical axis wind turbine energy buffer device provided by the present invention is characterized in that it includes an energy buffer unit and a centrifugal speed regulating unit, wherein:

The energy buffer unit includes a slider 11 that is mounted on the horizontal support rod 9 and can slide left and right along the horizontal support rod 9, and the slider 11 is connected to the main shaft 10 through a buffer spring 12;

The centrifugal speed regulating unit includes three sleeves sleeved on the main shaft 10, along the main shaft 10 from top to bottom are fixed sleeve 1, middle sleeve 2 and lower end sleeve 3, wherein the The middle sleeve 2 and the lower end sleeve 3 can slide up and down along the main shaft 10 with the expansion and contraction of the centrifugal spring 4; the collar 6 covered with the weight 8 connects with the fixed sleeve 1 and the The lower end sleeve 3 is connected, and the collar 6 is connected with the middle sleeve 2 through the centrifugal spring 4; the baffle plate 7 connected with the collar 6 is placed at the outer end of the slider 11 to limit the slider 11 sliding along the horizontal support rod 9 in a direction away from the main shaft 10;

Further, as shown in FIG. 4 , there are preferably two buffer springs 12 .

Further, as shown in FIG. 5 , the connecting rod 5 connected with the fixed sleeve 1 and the lower end sleeve 3 has the same length, and the middle sleeve 2 is located between the fixed sleeve 1 and the lower end sleeve 3 middle position.

Further, as shown in Figure 5, Figure 6 and Figure 7, the collar 6 is composed of 5 small rings, wherein the middlemost small ring is connected with the baffle plate 7, and the other four small rings are connected with the connecting plate 7. The rod 5 is connected, and the small ring can rotate relative to the weight 8 as an axis.

Further, the mass of the weight 8 is smaller than that of the slider 11, and the shape of the weight 8 is shown in Fig. 8a, Fig. 8b and Fig. 8c.

The working principle of the energy buffer unit is introduced in detail as follows:

One end of the horizontal support rod 9 is connected to the blade 13, and the other end is connected to the main shaft 10; when the wind speed is stable, the slider 11 is in a balanced position under the action of its own centrifugal force and the pulling force of the buffer spring 12; When changing, the centrifugal force of the slider 11 changes,

The slider 11 is displaced under the action of its own centrifugal force and the pulling force of the buffer spring 12 to realize mutual conversion between the angular momentum of the slider and the angular momentum of the wind turbine; according to the law of conservation of angular momentum,

When the wind speed rises, the increase of the centrifugal force causes the slider 11 to move away from the main shaft, and the angular momentum of the slider 11 increases to suppress the increase of the wind turbine speed; when the wind speed decreases, the centrifugal force decreases and the slider 11 moves closer Moving in the direction of the main shaft, the angular momentum of the slider 11 decreases so as to suppress the decrease in the speed of the wind turbine; the mutual conversion between the angular momentum of the slider and the angular momentum of the wind turbine ensures the stability of the speed and output power of the wind turbine.

The working principle of the centrifugal speed control unit is introduced in detail as follows:

When the wind turbine is at rest, the centrifugal speed regulating unit and the slider 11 are in the initial position and the centrifugal spring 4 is in the initial length, and the stopper 7 is just vertically placed at the outer end of the slider 11; when the wind turbine starts , the baffle 7 restricts the sliding block 11 from sliding along the horizontal support rod in a direction away from the main shaft 10, so as to prevent the energy buffer unit from affecting the starting performance of the wind turbine; when the speed of the wind turbine gradually increases, the centrifugal spring 4 is elongated by the centrifugal force of the weight 8 and drives the collar 6, the middle sleeve 2 and the lower sleeve 3 to rise; when the wind turbine reaches a certain speed, the stopper 7 is higher than the slider 11 When , the energy buffering unit plays an energy buffering role.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (6)

1. a kind of H-type vertical axis windmill energy buffer device, which is characterized in that including energy buffer unit and centrifugal governor list Member, wherein：

The energy buffer unit includes being fitted into be installed on horizontal support bar (9) and can control along the horizontal support bar (9) The sliding block (11) of sliding, the sliding block (11) are connected by buffer spring (12) with the main shaft (10) being vertically arranged；

The centrifugal governor unit is placed on the sleeve on the main shaft (10) including three outsides, and along the main shaft (10) It is followed successively by fixes sleeve (1), middle part sleeve (2) and lower sleeve (3) from top to bottom, wherein the middle part sleeve (2) and described Lower sleeve (3) can be slided up and down with the flexible of centrifugation spring (4) along the main shaft (10)；It is cased with the lantern ring (6) point of weight (8) Do not coupled with the fixes sleeve (1) and the lower sleeve (3) by connecting rod (5), which passes through the centrifugation spring (4) couple with the middle part sleeve (2)；The baffle (7) coupled with the lantern ring (6) is placed in the sliding block (11) outer end, and limits The sliding block (11) is made to slide to far from the main shaft (10) direction along the horizontal support bar (9).

2. H-type vertical axis windmill energy buffer device as described in claim 1, which is characterized in that the buffer spring (12) it is preferably two.

3. H-type vertical axis windmill energy buffer device as claimed in claim 1 or 2, which is characterized in that with the fixing sleeve Cylinder (1) is identical with connecting rod (5) length that the lower sleeve (3) couples, and the intermediate sleeve (2) is located at the fixes sleeve (1) and the centre position of the lower sleeve (3).

4. the H-type vertical axis windmill energy buffer device as described in claims 1 to 3, which is characterized in that the lantern ring (6) It is made of five small rings, wherein most intermediate small ring couples with the baffle (7), the small ring of four additional joins with the connecting rod (5) It connects, the small ring can be relatively rotated with the weight (8) for axis.

5. the H-type vertical axis windmill energy buffer device as described in Claims 1 to 4, which is characterized in that the weight (8) Quality be less than the sliding block (11) quality.

6. a kind of H-type vertical axis windmill, which is characterized in that be equipped with the H-type vertical axis windmill described in Claims 1 to 5 Energy buffer device.