A device and method for effectively utilizing air pressure difference to generate electricity

Abstract

The present invention provides a device for effectively utilizing air pressure difference to generate electricity, comprising an air duct, a low-pressure box, a power generation mechanism and turbine blades; when the air flow enters from the air duct, the flow area of ​​the air flow gradually decreases in the process of entering the small end of the air duct from the large end of the air duct, resulting in a gradual increase in the air flow velocity. After the air flow velocity increases, the rotation speed of the turbine blades can be increased, thereby improving the power generation efficiency. At the same time, when the air flow enters the low-pressure box, under the action of the wind shield, the air flow is diverted and flows to the airfoil-shaped curved surfaces on both sides of the inner wall of the low-pressure box. When the air flow flows through the airfoil-shaped curved surfaces, a low pressure field is generated between the two airfoil-shaped curved surfaces inside the low-pressure box. The air pressure difference between the small end of the air duct and the low pressure field between the two airfoil-shaped curved surfaces is utilized to guide the air flow flowing out of the small end of the air duct to flow in the direction of the low pressure field, thereby further improving the flow velocity of the air flow in the air duct and further improving the power generation efficiency of the power generation mechanism.

Description

Technical Field

[0001] The present invention relates to the field of breeze power generation, and in particular to a device and method for effectively utilizing air pressure difference to generate electricity. Background Art

[0002] Wind power generation is popular among people because of its cleanliness, good environmental benefits, renewable nature and short infrastructure cycle. A wind turbine is composed of a wind turbine base and a motor body. The motor body uses wind power to drive the windmill blades to rotate, and then increases the rotation speed through a speed increaser to enable the generator to generate electricity. At present, wind turbines are greatly affected by the external environment during operation. When the external environment is in a strong wind environment, the wind turbine speed is too fast, and there is a risk of the windmill losing control. When the external environment is in a breeze environment, the wind turbine speed is too slow or cannot be started, making it difficult to meet the power generation needs. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above problems in the prior art, the present invention provides a device and method for effectively utilizing air pressure difference to generate electricity.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A device for effectively utilizing air pressure difference to generate electricity, comprising an air guide pipe, a low-pressure box, a power generation mechanism and turbine blades;

[0008] The low-pressure box is a rectangular box with openings at both ends. One end of the low-pressure box is an air inlet, and the other end of the low-pressure box is an air outlet. Airfoil shaped cambered surfaces are provided on the inner walls on both sides of the low-pressure box. After the wind source enters the low-pressure box, a low-pressure wind field is formed between the two airfoil shaped cambered surfaces.

[0009] The air duct is in the shape of a trumpet tube with a large end at one end and a small end at the other end. The large end section of the air duct is in the same direction as the air inlet of the low-pressure box. One end of the small end of the air duct is connected to the bottom of the low-pressure box near the air inlet and is connected to the inside of the low-pressure box.

[0010] The turbine blades are installed at the air outlet of the small end of the air guide pipe, and the turbine blades are connected to the power generation mechanism;

[0011] A wind shield is arranged at the air inlet of the low-pressure box, and the wind shield is arranged on a side of the turbine blade close to the air inlet of the low-pressure box.

[0012] Preferably, it also includes vertical axis wind turbine blades, wherein the vertical axis wind turbine blade installation sub-unit is in the low-pressure box and is located in the low-pressure wind field, and the vertical axis wind turbine blades are connected to the power generation mechanism.

[0013] Preferably, the power generation mechanism includes an inner rotor, an outer rotor, an outer cage, an inner cage, a stator, a battery pack, an inverter and a rectifier;

[0014] The turbine blades and the rotating shaft of the vertical axis wind power generator are respectively connected to the inner rotor and the outer rotor through transmission parts, and the inner rotor is sleeved in the outer rotor;

[0015] The inner wall of the outer rotor is provided with an inner squirrel cage, the outer wall of the outer rotor is provided with an outer squirrel cage, and the outer rotor is sleeved in the stator;

[0016] One end of the battery pack is connected to the rectifier and the inner rotor in sequence through a wire, and the other end of the battery pack is connected to the inverter and the stator in sequence through a wire.

[0017] Preferably, it also includes a support rod, a base and a wind-following tail wing;

[0018] The wind-following tail wing is fixed on the top of the low-pressure box;

[0019] One end of the top of the support rod is fixedly connected to the bottom of the low-voltage box, and one end of the bottom of the support rod is rotatably connected to the base.

[0020] Preferably, a closing mechanism for closing the air inlet of the low-pressure box is provided in the wind shield.

[0021] Preferably, the closing mechanism comprises an arc closing plate, a driving gear, a motor, a driving shaft and a reduction gear set;

[0022] An arc-shaped through slot is provided in the windshield;

[0023] The arc closing plates are provided in two pieces, which are slidably mounted on the two side walls of the arc-shaped through groove respectively;

[0024] The driving gear is connected to the motor and installed between the two circular arc closing plates, and the circular arc closing plates are provided with tooth grooves corresponding to the driving gear;

[0025] The inner walls on both sides of the low-pressure box are provided with locking grooves corresponding to the arc closing plates;

[0026] One end of the driving shaft is connected to the driving gear, the other end of the driving shaft is connected to the reduction gear set, the reduction gear set is connected to the driving gear ring, and the driving gear ring is fixed on the small end of the air guide pipe;

[0027] The motor rotates the driving gear, and when the end of the arc closing plate enters the corresponding locking groove, the driving gear ring rotates 180°.

[0028] Preferably, it also includes an external protection mechanism, which includes isolation columns and a protection net. There are multiple isolation columns, and the multiple isolation columns are arranged around the low-voltage box. A protection net is arranged between adjacent isolation columns.

[0029] A method for effectively utilizing air pressure difference to generate electricity. When air flow enters from an air duct, its flow area gradually decreases in the process of entering the small end of the air duct from the large end of the air duct, resulting in a gradual increase in air flow velocity. When the air flow velocity increases, the rotation speed of the turbine blades can be increased, thereby improving the power generation efficiency. At the same time, when the air flow enters a low-pressure box, the air flow is diverted under the action of a wind shield and flows to the airfoil-shaped curved surfaces on both sides of the inner wall of the low-pressure box. When the air flow flows through the airfoil-shaped curved surfaces, the air flow velocity increases due to the shape of the curved surfaces, thereby reducing the air pressure near the curved surfaces, thereby generating a low pressure field between the two airfoil-shaped curved surfaces inside the low-pressure box. The air pressure difference between the small end of the air duct and the low pressure field between the two airfoil-shaped curved surfaces is utilized to guide the air flow flowing out of the small end of the air duct to flow in the direction of the low pressure field, thereby further improving the flow velocity of the air flow in the air duct and further improving the power generation efficiency of the power generation mechanism.

[0030] (III) Beneficial effects

[0031] The beneficial effects of the present invention are:

[0032] 1. The large and small heads of the air duct are arranged to form a first low-pressure wind field with a relatively fast airflow velocity at the air outlet of the air duct. The turbine blades can improve the power generation efficiency in the low-pressure wind field. The wind shield at the air inlet of the low-pressure box has the following functions: (1) to realize the diversion of the airflow entering the low-pressure box, so that the airflow is diverted into two airflows and flows to the airfoil-shaped curved surfaces on both sides of the low-pressure box respectively. When the diverted airflow flows through the airfoil-shaped curved surfaces, the air pressure near the curved surfaces is reduced, thereby generating a second low-pressure field between the two airfoil-shaped curved surfaces inside the low-pressure box. The second low-pressure field can guide the airflow flowing out of the small end of the air duct to flow in the direction of the low-pressure field, thereby further increasing the flow velocity of the airflow in the air duct and further improving the power generation efficiency;

[0033] (2) The wind shield can prevent the airflow flowing into the low-pressure box from impacting the airflow flowing out of the air duct, thereby avoiding the generation of turbulence. The airflow flowing out of the air duct can better merge with the airflow diverted by the wind shield and then flow out to the air outlet of the low-pressure box. The merged airflow can further increase the air volume of the airflow in the second low-pressure field, thereby achieving a mutual beneficial influence between the two low-pressure fields.

[0034] 2. Turbine blades and vertical axis wind turbine blades are placed in the two low-pressure wind fields respectively, which can respectively drive the inner rotor and the outer rotor in the dual-rotor generator to rotate, and effectively utilize the two low-pressure wind fields generated in this application, thereby achieving efficient power generation;

[0035] 3. The setting of the closing mechanism can not only close the air inlet of the low-pressure box, but also the driving shaft rotates the driving gear ring 180° through the reduction gear set, so that the air inlet of the air duct is set back to the wind source to achieve shutdown protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a device for effectively utilizing air pressure difference to generate electricity Figure 1 ;

[0037] Figure 2 A schematic diagram of a device for effectively utilizing air pressure difference to generate electricity Figure 2 ;

[0038] Figure 3 It is a schematic diagram of the longitudinal structure of a device for effectively utilizing air pressure difference to generate electricity;

[0039] Figure 4 It is a cross-sectional structural schematic diagram of a device for effectively utilizing air pressure difference to generate electricity;

[0040] Figure 5 It is a schematic diagram of the structure of the power generation mechanism;

[0041] Figure 6 The structure of the closed mechanism Figure 1 ;

[0042] Figure 7 The structure of the closed mechanism Figure 2 .

[0043] Description of reference numerals:

[0044] 1. Low voltage box;

[0045] 2. Air duct;

[0046] 3. Turbine blades;

[0047] 4. Vertical axis wind turbine blades;

[0048] 5. Power generation mechanism;

[0049] 51. Inner rotor; 52. Outer rotor; 53. Inner cage; 54. Outer cage; 55. Stator; 56. Battery pack; 57. Rectifier; 58. Inverter;

[0050] 6. Support rod;

[0051] 7. Base;

[0052] 8. Wind-following tail;

[0053] 9. Closed mechanism;

[0054] 91. Arc closing plate; 92. Driving gear; 93. Locking groove; 94. Driving shaft; 95. Reduction gear set; 96. Driving gear ring. DETAILED DESCRIPTION

[0055] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0056] Please refer to Figures 1 to 5 The present invention provides a device for effectively utilizing air pressure difference to generate electricity, comprising an air guide 2, a low-pressure box 1, a power generation mechanism 5, and a turbine blade 3;

[0057] The low-pressure box 1 is a rectangular box with openings at both ends. One end of the low-pressure box 1 is an air inlet, and the other end of the low-pressure box 1 is an air outlet. Airfoil shaped cambered surfaces are provided on the inner walls of both the front and rear sides of the low-pressure box 1. After the wind source enters the low-pressure box 1, a low-pressure wind field is formed between the two airfoil shaped cambered surfaces.

[0058] The air duct 2 is in the shape of a trumpet tube with a large end at one end and a small end at the other end. The large end section of the air duct 2 is in the same direction as the air inlet of the low-pressure box 1. One end of the small end of the air duct 2 is connected to the bottom of the low-pressure box 1 near the air inlet and is connected to the inside of the low-pressure box 1.

[0059] The turbine blade 3 is installed at the air outlet of the small end of the air guide pipe 2, and the turbine blade 3 is connected to the power generation mechanism 5;

[0060] A windshield is provided at the air inlet of the low-pressure box 1, and the windshield is provided on a side of the turbine blade 3 close to the air inlet of the low-pressure box 1;

[0061] During use, when the airflow enters from the air duct 2, its flow area gradually decreases in the process of entering the small end from the large end of the air duct 2, resulting in a gradual increase in the airflow velocity. After the airflow velocity increases, the rotation speed of the turbine blades 3 can be increased, thereby improving the power generation efficiency. At the same time, when the airflow enters the low-pressure box 1, under the action of the wind shield, the airflow is diverted and flows to the wing-shaped curved surfaces on both sides of the inner wall of the low-pressure box 1. When the airflow flows through the wing-shaped curved surfaces, the shape of the curved surfaces causes the airflow velocity to increase, thereby reducing the air pressure near the curved surfaces, and then generating a low pressure field between the two wing-shaped curved surfaces inside the low-pressure box 1. Under the influence of the pressure gradient force, the airflow flowing out of the small end of the air duct 2 can be guided to flow in the direction of the low pressure field, thereby further increasing the flow velocity of the airflow in the air duct 2, and further improving the power generation efficiency of the power generation mechanism 5.

[0062] In this embodiment, it also includes a vertical axis wind power generation blade 4, which is installed in the low-voltage box 1 and is located in the low-voltage wind farm. The vertical axis wind power generation blade 4 is connected to the power generation mechanism 5, and the power generation mechanism 5 includes an inner rotor 51, an outer rotor 52, an outer cage 54, an inner cage 53, a stator 55, a battery pack 56, an inverter 58 and a rectifier 57;

[0063] The rotating shafts of the turbine blades 3 and the vertical axis wind turbine blades 4 are connected to the inner rotor 51 and the outer rotor 52 through transmission parts, respectively, and the inner rotor 51 is sleeved in the outer rotor 52;

[0064] The inner wall of the outer rotor 52 is provided with an inner squirrel cage 53, the outer wall of the outer rotor 52 is provided with an outer squirrel cage 54, and the outer rotor 52 is sleeved in the stator 55;

[0065] One end of the battery pack 56 is connected to the rectifier 57 and the inner rotor 51 in sequence through a wire, and the other end of the battery pack 56 is connected to the inverter 58 and the stator 55 in sequence through a wire;

[0066] When in use, the air flow velocity in the low-pressure wind field is relatively fast, which can increase the rotation speed of the vertical-axis wind turbine blades 4, thereby driving the outer rotor 52 to rotate. The rotation of the turbine blades 3 drives the inner rotor 51 to rotate. The design of the dual-rotor generator allows the inner rotor 51 and the outer rotor 52 to rotate at different speeds to achieve efficient power generation. In the present application, the small end of the air duct 2 is the first low-pressure wind field, and the second low-pressure wind field is between the two airfoil-shaped arc surfaces inside the low-pressure box 1. The turbine blades 3 and the vertical-axis wind turbine blades 4 are respectively placed in the two low-pressure wind fields, which can respectively drive the inner rotor 51 and the outer rotor 52 in the dual-rotor generator to rotate, thereby improving the power generation efficiency of the present application.

[0067] It should be noted that, in the above two low-pressure wind fields, the wind pressure of the second low-pressure wind field is lower than the wind pressure of the first low-pressure wind field.

[0068] In this embodiment, it also includes a support rod 6, a base 7 and a wind-following tail wing 8;

[0069] The wind-following tail wing 8 is fixed on the top of the low-pressure box 1;

[0070] One end of the top of the support rod 6 is fixedly connected to the bottom of the low-voltage box 1, and one end of the bottom of the support rod 6 is rotatably connected to the base 7;

[0071] When in use, with the cooperation of the wind-following tail wing 8, the support rod 6 and the base 7, the air inlet of the low-pressure box 1 can be directed toward the airflow.

[0072] refer to Figure 6 and Figure 7 In this embodiment, a closing mechanism 9 for closing the air inlet of the low-pressure box 1 is provided in the wind shield, and the closing mechanism 9 includes an arc closing plate 91, a driving gear 92, a motor, a driving shaft 94 and a reduction gear set 95;

[0073] An arc-shaped through slot is provided in the windshield;

[0074] The arc closing plates 91 are provided in two pieces, which are slidably mounted on the two side walls of the arc-shaped through groove respectively;

[0075] The driving gear 92 is connected to the motor and installed between the two arc closing plates 91. The arc closing plates 91 are provided with tooth grooves corresponding to the driving gear 92.

[0076] The inner walls of both sides of the low-pressure box 1 are provided with locking grooves 93 corresponding to the arc closing plate 91;

[0077] One end of the driving shaft 94 is connected to the driving gear 92, and the other end of the driving shaft 94 is connected to the reduction gear set 95, and the reduction gear set 95 is connected to the driving gear ring 96, and the driving gear ring 96 is fixed on the small end of the air guide pipe 2;

[0078] The motor rotates the driving gear 92, and when the end of the arc closing plate 91 enters the corresponding locking groove 93, the driving gear ring 96 rotates 180°;

[0079] When in use, the motor drives the driving gear 92 to rotate, causing the two arc closing plates 91 to move away from each other, and the ends of the arc closing plates 91 enter the corresponding locking grooves 93, thereby closing the air inlet of the low-pressure box 1. At the same time, the driving shaft 94 rotates the driving gear ring 96 180° through the reduction gear set 95, thereby making the air inlet of the air duct 2 face away from the wind source to achieve shutdown protection.

[0080] In this embodiment, an external protection mechanism is also included, which includes isolation columns and a protection net. There are multiple isolation columns, and the multiple isolation columns are arranged around the low-voltage box 1. A protection net is arranged between adjacent isolation columns to play an external protection role.

[0081] The working principle of the present invention is as follows:

[0082] When the air flow enters from the air duct 2, its flow area gradually decreases in the process of entering the small end from the large end of the air duct 2, resulting in a gradual increase in the air flow velocity. After the air flow velocity increases, the rotation speed of the turbine blades 3 can be increased, thereby improving the power generation efficiency. At the same time, when the air flow enters the low-pressure box 1, under the action of the wind shield, the air flow is diverted and flows to the airfoil-shaped curved surfaces on both sides of the inner wall of the low-pressure box 1. When the air flow flows through the airfoil-shaped curved surfaces, the shape of the curved surfaces causes the air flow velocity to increase, thereby reducing the air pressure near the curved surfaces, and then generating a low pressure field between the two airfoil-shaped curved surfaces inside the low-pressure box 1. Under the influence of the pressure gradient force, the air flow flowing out of the small end of the air duct 2 can be guided to flow in the direction of the low pressure field, thereby further increasing the flow velocity of the air flow in the air duct 2, and further improving the power generation efficiency of the power generation mechanism 5.

[0083] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0084] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for effectively utilizing air pressure difference to generate electricity, characterized in that: It includes an air guide duct, a low-pressure box, a power generation mechanism, a vertical-axis wind turbine blade and a turbine blade; The low-pressure box is a rectangular box with openings at both ends. One end of the low-pressure box is an air inlet, and the other end of the low-pressure box is an air outlet. Airfoil shaped cambered surfaces are provided on the inner walls on both sides of the low-pressure box. After the wind source enters the low-pressure box, a low-pressure wind field is formed between the two airfoil shaped cambered surfaces. The air duct is in the shape of a trumpet tube with a large end at one end and a small end at the other end. The large end section of the air duct is in the same direction as the air inlet of the low-pressure box. One end of the small end of the air duct is connected to the bottom of the low-pressure box near the air inlet and is connected to the inside of the low-pressure box. The turbine blades are installed at the air outlet of the small end of the air guide pipe, and the turbine blades are connected to the power generation mechanism; A wind shield is arranged at the air inlet of the low-pressure box, and the wind shield is arranged on a side of the turbine blade close to the air inlet of the low-pressure box; The vertical-axis wind power generation blades are installed in the low-pressure box and are located in the low-pressure wind field. The vertical-axis wind power generation blades are connected to the power generation mechanism.

2. The device for generating electricity by effectively utilizing air pressure difference according to claim 1, characterized in that: The power generation mechanism includes an inner rotor, an outer rotor, an outer cage, an inner cage, a stator, a battery pack, an inverter and a rectifier; The turbine blades and the rotating shaft of the vertical axis wind power generator are respectively connected to the inner rotor and the outer rotor through transmission parts, and the inner rotor is sleeved in the outer rotor; The inner wall of the outer rotor is provided with an inner squirrel cage, the outer wall of the outer rotor is provided with an outer squirrel cage, and the outer rotor is sleeved in the stator; One end of the battery pack is connected to the rectifier and the inner rotor in sequence through a wire, and the other end of the battery pack is connected to the inverter and the stator in sequence through a wire.

3. The device for generating electricity by effectively utilizing air pressure difference according to claim 1, characterized in that: It also includes support poles, base and wind-following tail fins; The wind-following tail wing is fixed on the top of the low-pressure box; One end of the top of the support rod is fixedly connected to the bottom of the low-voltage box, and one end of the bottom of the support rod is rotatably connected to the base.

4. The device for generating electricity by effectively utilizing air pressure difference according to claim 1, characterized in that: A closing mechanism for closing the air inlet of the low-pressure box is arranged in the wind shield.

5. The device for generating electricity by effectively utilizing air pressure difference according to claim 4, characterized in that: The closing mechanism comprises an arc closing plate, a driving gear, a motor, a driving shaft and a reduction gear set; An arc-shaped through slot is provided in the windshield; The arc closing plates are provided in two pieces, which are slidably mounted on the two side walls of the arc-shaped through groove respectively; The driving gear is connected to the motor and installed between the two circular arc closing plates, and the circular arc closing plates are provided with tooth grooves corresponding to the driving gear; The inner walls on both sides of the low-pressure box are provided with locking grooves corresponding to the arc closing plates; One end of the driving shaft is connected to the driving gear, the other end of the driving shaft is connected to the reduction gear set, the reduction gear set is connected to the driving gear ring, and the driving gear ring is fixed on the small end of the air guide pipe; The motor rotates the driving gear, and when the end of the arc closing plate enters the corresponding locking groove, the driving gear ring rotates 180°.

6. The device for generating electricity by effectively utilizing air pressure difference according to claim 1, characterized in that: It also includes an external protection mechanism, which includes isolation columns and a protection net. There are multiple isolation columns, and the multiple isolation columns are arranged around the low-voltage box. A protection net is arranged between adjacent isolation columns.

7. A method for generating electricity based on the device for generating electricity by effectively utilizing air pressure difference according to any one of claims 1 to 6, characterized in that: When the air flow enters from the air duct, its flow area gradually decreases in the process of entering the small end from the large end of the air duct, resulting in a gradual increase in the air flow velocity. The increase in air flow velocity can increase the rotation speed of the turbine blades, thereby improving the power generation efficiency. At the same time, when the air flow enters the low-pressure box, under the action of the wind baffle, the air flow is diverted and flows to the wing-shaped curved surfaces on both sides of the inner wall of the low-pressure box. When the air flow flows through the wing-shaped curved surfaces, the air flow velocity increases due to the shape of the curved surfaces, thereby reducing the air pressure near the curved surfaces, and then generating a low pressure field between the two wing-shaped curved surfaces inside the low-pressure box. The air pressure difference between the small end of the air duct and the low pressure field between the two wing-shaped curved surfaces is used to guide the air flow flowing out of the small end of the air duct to flow in the direction of the low pressure field, which can further increase the flow velocity of the air flow in the air duct and further improve the power generation efficiency of the power generation mechanism.

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