CN102042162B - Pressure relief device - Google Patents

Abstract

A pressure relief device comprises a body, wherein at least one flow channel which penetrates through two ends is arranged in the body, at least two flow channel openings are formed, a cover plate is transversely pivoted in each flow channel opening, in addition, a pneumatic control unit is respectively arranged in the flow channel and adjacent to the cover plates, and the pneumatic control unit is connected to a pneumatic control device, so that the pneumatic control device can drive the pneumatic control units to control the opening and closing of the cover plates, and further the opening and closing of the flow channel are controlled.

Description

pressure relief device

technical field

The present invention relates to a pressure relief device.

Background technique

With the emergence of oil and other energy crises, the current countries are all devoting themselves to the research and development of new alternative energy sources, such as wind energy, solar energy, geothermal energy, tidal energy, etc. Among them, wind energy is widely used in various countries due to its characteristics of zero pollution and low construction cost. Please refer to FIG. 1, which is a known wind power generator, which includes a tower 1, a generator body 2 connected to the top of the tower 1, and a blade group 3 connected to the front end of the generator body 2. , thus, the wind energy drives the blade set 3 to rotate around the shaft, and drives the generator body 2 to run and generate electricity, so that the wind energy can be converted into electrical energy for use. Proportional, but too large wind speed will cause the blade group 3 to rotate too fast, so that the generator body 2 will burn out due to excessive operation. Slow down or stop running to achieve the protective effect, but the automatic braking device cannot reduce the wind pressure on the blade group 3, and excessive wind speed will still cause blade breakage and other damage to the wind turbine, especially when typhoons are prone to occur. In some areas, strong winds up to level 10 and above are often blown, and the wind direction is unpredictable, which will pose a serious threat to the wind turbine. Therefore, how to develop a pressure relief device to automatically start when the wind speed is too high, It is really necessary to reduce the wind pressure that the whole wind power generator bears.

Contents of the invention

The object of the present invention is to provide a pressure relief device to improve the defects in the known technology.

In order to achieve the above object, the pressure relief device provided by the present invention can be arranged on the blade of a wind power generator or the generator body, the pressure relief device is connected with an air control device, and can be controlled by the air control device, and It includes a main body and at least two air control units, wherein, at least one flow channel passing through both ends is provided in the main body, and at least two flow channel openings are formed, each of the flow channel openings is pivotally connected with a cover plate laterally, and the cover plate It can be divided into two blocks with the pivot shaft as the center, and the air control units are accommodated in the flow channel and arranged adjacent to the cover plates respectively, and the air control unit includes at least one rotation limiter, at least two The first air control, at least one second air control, and at least one third air control, wherein the rotation limiter is arranged in the rotation range of the cover plate, and the first air controls are respectively adjacent to two sides of the cover plate The block is set and located at the edge of the rotation range of the cover, and the first air control is connected with the air control device, and can be controlled by it to block the cover, so that the cover cannot rotate, and , the second air control is located on one side of the rotation restriction, and is connected with the air control device, and the third air control is arranged on the other side of the rotation restriction relative to the second air control, and is connected with the rotation restriction The air control device is connected.

According to the design of the present invention, when the ambient wind speed is too high, the air control device will control the pressure relief device to open the cover plates, so that the air flow directly passes through the blade or the generator body through the flow channel, so as to relieve the pressure of the blade or the generator body. The wind pressure borne by the generator body can achieve the purpose of avoiding damage to the blades caused by excessive wind speed, or even collapse accidents of the wind generator.

Description of drawings

Fig. 1 is a perspective view of a known wind power generator.

Fig. 2 is a perspective view of the wind power generator of the present invention.

Fig. 3 is a partially enlarged cross-sectional view of a preferred embodiment of the present invention.

Fig. 4 is a partially enlarged top view of a preferred embodiment of the present invention.

FIG. 5 is a partially enlarged schematic diagram of the action of a preferred embodiment of the present invention, to show the situation that the upper end side of the pressure relief device is opened after being pressurized.

FIG. 6 is a partially enlarged schematic diagram of the action of the preferred embodiment of the present invention, to show the situation that the lower end side of the pressure relief device is opened after being pressurized.

Fig. 7 is a perspective view of another preferred embodiment of the present invention.

Detailed ways

Please refer to Fig. 2 and Fig. 3, which are a perspective view and a partially enlarged sectional view of a preferred embodiment of the present invention. The wind generator 100 includes a tower 10, a generator body 20 at the top of the tower 10, a The blade set 30 arranged at the front end of the generator body 20 , an air control device 40 arranged in the shaft cover 31 of the blade set 30 , and several pressure relief devices 50 distributed on the blades 32 of the blade set 30 , wherein, the pressure relief device 50 includes:

A main body 51 is provided with a flow passage 52 passing through both ends, and is formed with two flow passage openings 53. As shown in FIG. The cover plate 55 is divided into two blocks 551 centered on the pivot shaft 54, and each block 551 is symmetrically provided with a stop portion 552, and the inner wall of the body 51 is corresponding to each stop portion 552. A chamber 56 is provided.

Two air control units 60 are accommodated in the flow channel 52 of the body 51 and are arranged adjacent to the cover plates 55 respectively. The air control unit 60 includes a rotation limiting member 61, two first air controls 62, a second air control unit Control 63 and a third air control 64, wherein, the rotation limiter 61 is located within the rotation range of the cover plate 55, and in this embodiment, is arranged in the flow passage 52 parallel to the pivot shaft 54, However, the first air controls 62 are respectively arranged adjacent to the two blocks 551 of the cover plate 55, and are located at the edge of the rotation range of the cover plate 55. In this embodiment, the first air controls 62 are respectively located at In the chamber 56 of the body 51, a stopper 621 with one end pivotally connected to the inner wall of the body 51 and an inflatable air bag 622 between the stopper 621 and the inner wall of the chamber 56 are formed. And the air bag 622 is connected to the air supply main pipe 41 of the air control device 40, and the second air control 63 is an air pipe connected to the air supply main pipe 41 of the air control device 40, and its air outlet It is arranged on the left side of the rotation limiter 61, and the third air control 64 is also an air duct, which is connected to the air supply main pipe 41 of the air control device 40, and its air outlet is opposite to the second air duct. The control 63 is disposed on the right side of the rotation limiting member 61 .

Please refer to Fig. 3 and Fig. 5 at the same time, in a normal state, the air control device 40 provides positive pressure to the air bags 622 of the first air controls 62, so that it is filled with gas and inflated to push the stopper 621 out of the air bag 622. The chamber 56 is against the stop portion 552 of the cover plate 55 so that the cover plate 55 cannot rotate, so as to keep the surface of the blade 32 consistent without affecting the operating efficiency of the blade 32 .

However, when the wind generator 100 is in a high wind speed environment and enters a shutdown state, the air control device 40 will provide negative pressure to the airbags 622 to shrink them, and then make the stoppers 621 return to the chamber 56, at this time, since the cover plate 55 is eccentrically pivoted on the body 51, as shown in Figure 5, if the pressure on the upper end side is relatively large, the cover plate 55 located at the upper end of the flow channel will Clockwise rotation and stop on the right side of the rotation limiter 61, so that the air flow enters the flow channel 52 from the flow channel opening 53, and pushes the cover plate 55 located at the lower end of the flow channel 52 to rotate clockwise to stop at the Rotate the left side of the restriction member 61 to open the flow channel opening 53 at the other end, so that the two ends of the flow channel 52 are connected, so that the air flow can directly pass through the blade 32, and the effect of reducing the wind pressure on the blade 32 can be achieved. Of course, as shown in Figure 6, if the pressure on the lower end side is relatively high, the cover plates 55 will rotate counterclockwise to open the flow channel openings 53, so that the air flow can directly pass through the blades 32 to achieve the decompression effect .

Afterwards, when the ambient wind speed slows down, the air control device 40 will provide a slight positive pressure to the airbags 622 to inflate them slightly and push the stoppers 621 slightly out of the chamber 56. At the same time, the air control device 40 will respectively provide positive pressure to the third air control 64 located at the upper end of the flow channel 52 and the second air control 63 located at the lower end of the flow channel 52, so that the blowing air pushes the cover plates 55 to rotate counterclockwise. At this time, Since the airbags 622 are not fully inflated, the stoppers 621 will be pressed by the cover plates 55 to deflect in the direction of the chamber 56, and when the cover plates 55 pass through their free ends, The elastic force of these airbags 622 resets and stops on the stop portions 552 of these cover plates 55, so that these cover plates 55 cover these flow channel openings 53 again, and finally, the air control device 40 will provide positive pressure to the Inflate the airbags 622 to fix the stoppers 621, make sure that the cover plates 55 cannot rotate, and then start the blade assembly 30 of the wind generator 100 to start running.

Please refer to FIG. 7 again, which is a perspective view of another preferred embodiment of the present invention. Since the area of the generator body 20 ring side of the wind generator 100 is relatively large, when the wind hits from the side, it will The wind power generator 100 is subject to a relatively large wind pressure, so in this embodiment, these pressure relief devices 50 can be installed on the ring side of the generator body 20, and can The same effect as that of the aforementioned preferred embodiment is achieved, and the wind pressure borne by the generator body 20 is effectively reduced.

Claims (6)

1. a pressure relief device is connected with an air-control device, can accept the control of this air-control device, includes:

One body, in be provided with the runner at least one perforation two ends, and be formed with at least two runner mouths, each laterally is articulated with a cover plate in those runner mouths, and this cover plate is that off-centre is articulated in this runner mouth, and is distinguished into two blocks centered by drive-connecting shaft;

At least two gas control unit are placed in this runner and are respectively adjacent to those cover plate settings, and this gas control unit includes at least one limit rotation part, at least two first gas control spares, at least one the second gas control spare and at least one the 3rd gas control spare; Wherein, this limit rotation part is arranged in the rotating range of this cover plate, and those first gas control spares are respectively adjacent to two block settings of this cover plate, and is positioned at the slewing area edge of this cover plate, and this first gas control spare is connected with this air-control device; This second gas control spare is positioned at a side of this limit rotation part, and is connected with this air-control device; The 3rd gas control spare then relatively this second gas control spare be arranged at the in addition side of this limit rotation part, and be connected with this air-control device;

Described the first gas control spare includes the interdiction piece that an end is articulated in this inner body wall, but and a breathing air bag that is positioned between this interdiction piece and this body;

Described the second gas control spare and the 3rd gas control spare are an airduct.

2. according to pressure relief device claimed in claim 1, wherein, this air-control device is arranged at the shaft-cup place of the vane group of a wind-driven generator.

3. according to pressure relief device claimed in claim 1, wherein, this pressure relief device is installed on the blade of vane group of a wind-driven generator.

4. according to pressure relief device claimed in claim 1, wherein, this pressure relief device is installed on the generator body of a wind-driven generator.

5. according to pressure relief device claimed in claim 1, wherein, this cover plate is that mutual symmetry respectively is provided with a stopper part in this two block.

6. according to pressure relief device claimed in claim 5, wherein, this body in the inwall of this runner to being concaved with a room in two stopper parts.

Images