Apparatus and control method for increasing efficiency of wind power generator based on fluid kinetic energy

Abstract

The application discloses a device and a control method for increasing efficiency of wind power generator based on fluid kinetic energy, and mainly relates to the field of fan power generation equipment. The device comprises a generator main body and fan blades, and the fan blades are connected with the generator main body. The device further comprises a detection fixed end, an acting piece main body and a control system, and the control system is connected with the detection fixed end. The device has the advantages that the generation condition of the vertical shaft wind power generator can be set, the generation efficiency of the vertical shaft wind power generator can be increased, and the generation stability of the vertical shaft wind power generator is better, so that the use demand of normal generation can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind turbine generator, in particular to the device and control method for increasing the power generation efficiency of wind turbine generator based on fluid kinetic energy. BACKGROUND

[0002] As a direct conversion of wind energy to electric energy, wind power generation is highlighted in some countries and regions because it does not need fuel consumption and reasonably utilizes natural resources. As the basic equipment of wind power generation, wind turbine can effectively convert air kinetic energy into blade kinetic energy, and through the rotation of the blades of the wind turbine, the kinetic energy is converted into electric energy, so as to utilize air kinetic energy and reduce the consumption of fuel resources such as coal, thereby achieving the purpose of energy saving and emission reduction. The commonly used wind power generation equipment at present includes horizontal axis wind turbine and vertical axis wind turbine. Because the horizontal axis wind turbine equipment is large and has high requirements for the site, it needs to be installed in very open plains and hilly areas, so the widely used wind power generation equipment is vertical axis wind turbine.

[0003] The vertical axis wind turbine has a rotating shaft perpendicular to the ground or the direction of airflow. There are several types of vertical axis wind turbines that rotate by resistance, including wind wheels made of flat plates and cups, such as S-shaped windmills, which have partial lift but are mainly resistance devices. These devices have a large starting torque, but the tip speed ratio is low, and under the condition of a certain size, weight and cost of the wind wheel, the power output is low. The advantage of vertical axis wind turbine is that it does not need to face the wind when the wind direction changes, which is a great advantage over horizontal axis wind turbine. It not only simplifies the structural design, but also reduces the gyroscopic force of the wind wheel when facing the wind. However, the problem mentioned above is that the power generation effect of vertical axis wind turbine is limited, which restricts the application of vertical axis wind turbine.

[0004] Based on the above problems, the device and control method for increasing the power generation efficiency of wind turbine generator based on fluid kinetic energy need to be set up, which can be set according to the power generation situation of vertical axis wind turbine, so as to increase the power generation efficiency of vertical axis wind turbine and ensure better power generation stability to meet the normal power generation requirements. SUMMARY

[0005] The present application relates to the field of wind turbine generator, in particular to the device and control method for increasing the power generation efficiency of wind turbine generator based on fluid kinetic energy.

[0006] The application achieves the above-mentioned purpose through the following technical solutions.

[0007] The equipment for wind power generator power generation efficiency improvement based on fluid kinetic energy includes a generator main body and fan blades, the fan blades are connected with the generator main body; a detection fixed end, an acting element main body and a control system are included, and the control system is connected with the detection fixed end.

[0008] The detection fixed end includes a fixed end head and a tension detection assembly, the fixed end head is matched with the fan blade, and the tension detection assembly is arranged at the matching connection position of the acting element main body and the fixed end head to detect the acting force of the acting element main body on the fixed end head.

[0009] The acting element main body includes a flexible acting element, the flexible acting element is made of soft flexible material, and the two ends of the flexible acting element are connected with the two fixed end heads after the two fixed end heads are matched with the adjacent fan blades.

[0010] The fixed end head is arranged with an end head sliding groove on the fan blade, the opening direction of the end head sliding groove is arranged along the extension direction of the arc surface of the fan blade, and the fixed end head is arranged in the end head sliding groove; an end head circuit induction group is arranged in the end head sliding groove matched with the fixed end head, and the position of the fixed end head in the end head sliding groove is identified through the end head circuit induction group.

[0011] The end head circuit induction group includes a plurality of contact potentials, the plurality of contact potentials are arranged at equal intervals at the inner two sides of the end head sliding groove, the plurality of contact potentials on one side are connected with the same circuit, and the connected circuit is connected with the control system; when the fixed end head is in the end head sliding groove and the two sides of the fixed end head are in contact with the contact potentials on the two sides of the end head sliding groove, a closed loop is formed between the fixed end head and the control system.

[0012] The tension detection assembly is a tension sensor, the outer end surface of the fixed end head is a movable end surface, the tension sensor is arranged in the fixed end head, and the outer end surface is connected with the movable end surface of the fixed end head.

[0013] A position driving assembly is arranged in the end head sliding groove, and the position driving assembly is matched with the fixed end head to adjust the position of the fixed end head in the end head sliding groove.

[0014] The acting element main body includes a plurality of flexible traction belts, and the flexible traction belts are filled with fluid; the fluid filled in the flexible traction belts is a non-Newtonian fluid.

[0015] The plurality of flexible traction belts are arranged in a spiral structure.

[0016] The control method of the device for improving the power generation efficiency of a wind turbine by fluid kinetic energy comprises the following steps:

[0017] S1, in the state that the generator as a whole does not rotate, the position driving assembly drives the fixed end to move in position, so that the fixed end is at the innermost end position of the end slot;

[0018] S2, when the fan blades of the vertical-axis wind turbine are driven to rotate under the action of wind force, the control system detects that the fan blades are rotating, thereby controlling the position driving assembly to drive the fixed end to move in position;

[0019] S3, at the same time, the tension detection assembly detects the tension applied by the action piece body to the control system, and combines the position information transmitted by the end circuit induction group to make the control system calculate the kinetic energy of the action piece body at this time according to the transmitted information combined with the circular motion formula;

[0020] S4, when the fan blades have a certain kinetic energy, the position driving assembly releases the restriction on the action piece body, so that the action piece body moves along the end slot under the action of the force and slides to the outer end position of the end slot, thereby achieving the starting state of the vertical-axis wind turbine;

[0021] S5, when the control system detects that the wind turbine power generation efficiency decreases, the action piece body applies the kinetic energy stored in itself to the fan blades, so that the fan blades obtain kinetic energy. The main purpose of this setting is to ensure that the fan blades do not stop due to insufficient force during the wind power reduction process;

[0022] S6, when the kinetic energy of the action piece body is consumed, the control system detects that the vertical-axis generator power generation efficiency decreases and disappears, and the control system controls the position driving assembly to drive the action piece body to move to the inner end position of the end slot;

[0023] S7, when the control system detects that the vertical-axis generator power generation efficiency decreases, the control system detects that the vertical-axis generator power generation efficiency decreases and disappears, and the control system controls the position driving assembly to drive the action piece body to move to the inner end position of the end slot;

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] The device can improve the power generation efficiency of the wind turbine by detecting the fixed end and the action piece body of the fan blades.

[0026] The detection fixed end is arranged to cooperate with the action member body for use. When the vertical shaft wind power generator is subjected to external force, it will normally rotate, and the action member body will synchronously rotate during the rotation. When the action member body rotates, it will apply an action force to the detection fixed end. In the state of gravity, a traction force will be applied to the detection fixed end, which provides the centripetal force of the action member body to satisfy the circular motion of the action member body. At this time, the circular motion radius of the action member body increases, so that the linear velocity of the action member body increases, thereby increasing the centripetal force of the fan blade as a whole. However, due to the traction force of the action member body, a part of the action force will be extended along the tangent direction of the circular motion, so as to strengthen the overall rotation effect of the fan blade. After the action member body is arranged, the overall mass of the fan blade increases, the kinetic energy is enhanced, so the effect of electric energy conversion is also increased, thereby achieving the effect of increasing the efficiency of the generator. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a structural schematic diagram of the present application. Figure 1 is a structural schematic diagram of the present application.

[0028] FIG. 2 is a partial structural schematic diagram of the present application. Figure 2 is a partial structural schematic diagram of the present application.

[0029] FIG. 3 is a structural diagram of the tension detection assembly of the present application. Figure 3

[0030] FIG. 4 is a force analysis diagram of the action member body of the present application when the action member body is started at the outermost position of the fan blade. (The dashed circle in the figure represents the motion trajectory of the circular motion of the end of the action member body; the solid circle in the figure represents the motion trajectory of the circular motion of the outer end of the fan blade; and the ellipse in the figure represents the position relationship of the two ends of the action member body) Figure 4 FIG. 5 is a force analysis diagram of the action member body of the present application when the action member body is at the outermost position of the fan blade and applies kinetic energy to the fan blade. (The dashed circle in the figure represents the motion trajectory of the circular motion of the end of the action member body; the solid circle in the figure represents the motion trajectory of the circular motion of the outer end of the fan blade; and the ellipse in the figure represents the position relationship of the two ends of the action member body)

[0031] Figure 5 FIG. 6 is a circular motion schematic diagram of the action member body of the present application when the action member body is started in the actual state. (The dashed circle in the figure represents the motion trajectory of the circular motion of the end of the action member body; the solid circle in the figure represents the motion trajectory of the circular motion of the outer end of the fan blade)

[0032] FIG. 7 is a control circuit schematic diagram of the end circuit induction group of the present application. Figure 6 FIG. 8 is a control circuit schematic diagram of the end circuit induction group of the present application.

[0033] Figure 7 FIG. 9 is a control circuit schematic diagram of the end circuit induction group of the present application.

[0034] FIG. 10 is a control circuit schematic diagram of the end circuit induction group of the present application.​​​Figure 8 is the internal structure diagram of the action body of the application.

[0035] Reference signs shown in the drawings:

[0036] 1, generator body; 2, fan blade; 3, fixed end; 4, tension detection assembly; 5, action body; 6, end sliding groove; 7, contact potential; 8, tension sensor; 9, flexible traction belt. DETAILED DESCRIPTION

[0037] The application will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the application and not used to limit the scope of the application. Furthermore, it should be understood that after reading the content of the application, those skilled in the art can make various modifications or changes to the application, and these equivalent forms also fall within the scope defined by the application.

[0038] Because the vertical axis wind turbine needs wind to drive the fan blade 2 to rotate when driving, so that the generator body 1 rotates at the same time, and the rotational kinetic energy is converted into electrical energy by the generator, so as to achieve the purpose of generating electricity. However, the existing vertical axis wind turbine cannot effectively withstand the wind force when generating electricity because the contact area between the fan blade 2 and the wind direction is small, so the fan blade 2 cannot effectively withstand the wind force, and the wind effect is not as good as that of the horizontal axis wind turbine. Moreover, there is a more important problem, because the vertical axis wind turbine has a small fan blade 2, so it is difficult to initially drive the vertical axis wind turbine, that is, to overcome the initial resistance of the generator to ensure the normal rotation of the vertical axis wind turbine blade, so as to realize the purpose of effective rotation of the vertical axis wind turbine for generating electricity. Therefore, for the present application, the following structure is set:

[0039] The equipment for increasing the efficiency of wind turbine power generation based on fluid kinetic energy comprises a generator body 1 and a fan blade 2, which are connected in cooperation. This is a basic structure for the vertical axis wind turbine, which will not be explained here. It comprises a detection fixed end, an action body 5 and a control system, which are connected in data. The control system is used to identify and control the circuit elements in the detection fixed end, so as to realize the purpose of intelligentization of the device.

[0040] The detection fixed end comprises a fixed end 3 and a tension detection assembly 4, which are connected in cooperation. The fixed end 3 is connected in cooperation with the fan blade 2, and the tension detection assembly 4 is connected in cooperation with the action body 5 and the fixed end 3. The tension detection assembly 4 detects the force of the action body 5 on the fixed end 3.

[0041] The action member body 5 comprises a flexible action member made of soft flexible material, and the two ends of the flexible action member are connected with the two fixed end heads 3 after the two fixed end heads 3 are matched with the adjacent fan blades 2 respectively.

[0042] When the fan blades 2 of the vertical axis generator are subjected to the action force under the action of wind, the fan blades 2 rotate and drive the flexible action member of the action member body 5 to rotate. When the flexible action member rotates with the fan blades 2, the force analysis of the action member body 5 and the fan blades 2 in this state is shown in the accompanying drawings of the specification. Figure 4

[0043] That is, the fan blades 2 drive the action member body 5 to rotate.

[0044] F1=F traction cos α;

[0045] In this state, the fan blades 2 drive the action member body 5 to rotate, so that the action member body 5 stores a certain kinetic energy.

[0046] When the action force on the fan blades 2 decreases or the external force resistance is large, the force analysis of the action member body 5 and the fan blades 2 in this state is shown in the accompanying drawings of the specification. Figure 5

[0047] F2=F traction cos β;

[0048] In this state, the action member body 5 applies the kinetic energy stored by itself to the fan blades 2, so that the fan blades 2 obtain kinetic energy. The main purpose of this setting is to ensure that the fan blades 2 do not stop due to insufficient action force during the reduction process in the wind power stage, thereby affecting the normal rotation of the fan blades. And after the action member body 5 is set, the overall mass of the fan blades 2 becomes larger, so in the state that the fan blades 2 are in stable rotation, the action member body 5 and the fan blades 2 are in a relative static state, and the action member body 5 will not hinder the normal rotation of the fan blades 2, thereby avoiding the influence of the normal rotation of the fan blades 2 due to the setting of the action member body 5. However, attention should be paid here that because the overall mass of the fan blades 2 becomes larger due to the increase of the action member body 5 when the fan blades 2 rotate as a whole, the problem of difficult initial rotation of the fan blades 2 may occur in this case. Therefore, the following structure is set:

[0049] ​​The end head sliding groove 6 is arranged on the fan blade 2, and the opening direction of the end head sliding groove 6 is arranged along the extension direction of the arc surface of the fan blade 2, and the fixed end head 3 is arranged in the end head sliding groove 6; the end head circuit induction group is arranged in the end head sliding groove 6 and the position of the fixed end head 3 in the end head sliding groove 6 is identified by the end head circuit induction group. After the end head sliding groove 6 is arranged, the distance between the fixed end head 3 and the generator body 1 can be changed, so that in the initial rotating state of the vertical shaft wind driven generator, the position of the fixed end head 3 close to the generator body 1 is reduced, the linear velocity of the action body 5 during rotation is reduced, the kinetic energy required by the action body 5 during rotation of the fan blade 2 is reduced, and the influence of the action body 5 on the initial start of the generator is avoided. Therefore, after the end head sliding groove 6 is arranged, the movement state shown in the accompanying drawings Figure 4 is avoided, and the movement state shown in the accompanying drawings Figure 6 is appeared. Compared with the former, the kinetic energy of the action body 5 during the start of the generator is the smallest, and the influence on the normal rotation of the fan blade is also the smallest. After the generator is normally operated, in order to make the action body 5 obtain more kinetic energy, the fixed end head 3 is arranged at the outermost position of the end head sliding groove 6, so that the action body 5 obtains more power to meet the action effect.

[0050] For judging the specific position of the fixed end head 3 in the end head sliding groove 6, the end head circuit induction group includes a plurality of contact potentials 7, the plurality of contact potentials 7 are arranged at equal intervals on the two sides of the inside of the end head sliding groove 6, the plurality of contact potentials 7 on one side are connected with the same circuit, and the connected circuit is connected with the control system; when the fixed end head 3 is in the end head sliding groove 6, and the two sides of the fixed end head 3 contact the contact potentials 7 on the two sides of the end head sliding groove 6, a closed loop is formed between the control system. As shown in the accompanying drawings Figure 7 , the specific position of the fixed end head 3 in the end head sliding groove 6 can be judged according to the detection information of the control system. In order to realize the automatic adjustment of the fixed end head 3 in the end head sliding groove 6, the tension detection assembly 4 is a tension sensor 8, the outer end surface of the fixed end head 3 is a movable end surface, and the tension sensor 8 is arranged in the fixed end head 3 and connected with the movable end surface of the fixed end head 3.

[0051] The control method for the above-mentioned control mode is as follows: in the state that the generator as a whole does not rotate, the position driving assembly drives the fixed end head 3 to move in position, so that the fixed end head 3 is at the innermost end position of the end head sliding groove 6; when the fan blades 2 of the wind turbine are driven to rotate under the action of wind force, the control system detects that the fan blades 2 rotate, thereby controlling the position driving assembly to drive the fixed end head 3 to move in position; at the same time, the tension detection assembly 4 detects the tension applied by the acting member main body 5 to the control system, and combines the position information transmitted by the end head circuit induction group to make the control system calculate according to the transmitted information combined with the circular motion formula to judge the kinetic energy of the acting member main body 5 at this time; after the fan blades 2 rotate with a certain kinetic energy, the position driving assembly releases the restriction on the acting member main body 5, so that the acting member main body 5 moves along the end head sliding groove 6 under the action of the force and slides to the outer end position of the end head sliding groove 6, thereby achieving the starting state of the vertical shaft wind turbine. For the position driving assembly provided herein, a traditional traction rod driving mode can be selected for setting, but it needs to meet the setting requirement in the end head sliding groove 6, which will not be explained in detail here.

[0052] The specific structure of the acting member main body 5 is as follows:

[0053] The acting member main body 5 comprises a plurality of flexible traction belts 9, and the flexible traction belts 9 are filled with fluid; the fluid filled in the flexible traction belts 9 is a non-Newtonian fluid, that is, in order to avoid the water hammer effect of the traditional fluid of the flexible traction belts 9 and cause damage to the vertical shaft fan blades. At the same time, a plurality of the flexible traction belts 9 are arranged in a spiral structure to reduce the influence of the action force between the plurality of flexible traction belts 9, because the spiral arrangement can buffer the action force, thereby avoiding the problem of inconsistent action force of the flexible traction belts 9.

[0054] The control method of the equipment for increasing the power generation efficiency of the wind turbine based on the kinetic energy of fluid includes the following steps:

[0055] S1, in the state that the generator as a whole does not rotate, the position driving assembly drives the fixed end head 3 to move in position, so that the fixed end head 3 is at the innermost end position of the end head sliding groove 6;

[0056] S2, when the fan blades 2 of the vertical shaft wind turbine are driven to rotate under the action of wind force, the control system detects that the fan blades 2 rotate, thereby controlling the position driving assembly to drive the fixed end head 3 to move in position;

[0057] S3, at the same time, the tension detection assembly 4 detects the tension applied to the action body 5 and transmits it to the control system, and combines the position information transmitted by the end circuit induction group to make the control system calculate according to the transmitted information combined with the circular motion formula to judge the kinetic energy of the action body 5 at this time;

[0058] S4, when the fan blade 2 rotates with a certain kinetic energy, the position driving assembly releases the restriction on the action body 5, so that the action body 5 moves along the end sliding groove 6 under the action of the force and slides to the outer end position of the end sliding groove 6, so as to achieve the starting state of the vertical axis wind turbine;

[0059] S5, when the control system detects that the wind turbine power generation efficiency decreases, the action body 5 applies the kinetic energy stored in itself to the fan blade 2, so that the fan blade 2 obtains kinetic energy. The main purpose of this setting is to ensure that the fan blade 2 does not stop due to insufficient force during the wind power reduction stage;

[0060] S6, when the kinetic energy of the action body 5 is consumed, the control system detects that the vertical axis generator power generation efficiency decreases and disappears, and the control system controls the position driving assembly to pull the action body 5, so that the action body 5 moves to the inner end position of the end sliding groove 6;

[0061] S7, when the control system detects that the vertical axis generator generates power, repeat the above S1-S6 steps, so as to complete the vertical axis wind turbine power generation operation.

[0062] Therefore, the setting of the fluid kinetic energy based wind turbine power generation efficiency device and control method can be set according to the power generation of the vertical axis wind turbine, so that the power generation efficiency of the vertical axis wind turbine can be increased, and better power generation stability can be ensured to meet the normal power generation requirements.

Claims

1. The equipment for wind power generator power generation efficiency based on fluid kinetic energy, including generator body (1), fan blade (2), the fan blade (2) is connected with the generator body (1) between cooperation; characterized in that Including detection fixed end, acting element body (5), control system;The control system is connected with the detection fixed end data; Detection fixed end: Including fixed end head (3), tension detection assembly (4), the fixed end head (3) is matched with the fan blade (2), and the tension detection assembly (4) is matched and arranged in the acting element body (5) and fixed end head (3) cooperation connection position, the force of the fixed end head (3) by the tension detection assembly (4) acting element body (5) is detected; Acting element body (5): Including flexible acting element, the flexible acting element is soft flexible material, after two the fixed end head (3) respectively with adjacent the fan blade (2) cooperation, the both ends of the flexible acting element are connected with two the fixed end head (3); The acting element body (5) includes a plurality of flexible traction belts (9), the flexible traction belt (9) is filled with fluid;When the flexible traction belt is at the outer end position of the fan blade (2), the flexible traction belt is in a non-straight state; The fluid filled in the flexible traction belt (9) is a non-newtonian fluid; A plurality of the flexible traction belt (9) is arranged in a spiral structure.

2. The apparatus for increasing the power generation of a wind turbine based on fluid kinetic energy according to claim 1, characterized in that: The fixed end head (3) is matched and arranged in the end head sliding groove (6); The fixed end head (3) is matched and arranged in the end head sliding groove (6); 3. The apparatus for increasing the power generation of a wind turbine based on fluid kinetic energy according to claim 2, characterized in that: The end head circuit induction group includes a plurality of contact potentials (7), a plurality of the contact potential (7) is arranged at equal intervals in the inside two sides of the end head sliding groove (6), and a plurality of the contact potential (7) on one side is connected with the same circuit, and the connected circuit is connected with the control system; When the fixed end head (3) is in the end head sliding groove (6), and the two sides of the fixed end head (3) are in contact with the contact potential (7) in the two sides of the end head sliding groove (6), a closed loop is formed between the control system.

4. The apparatus for increasing the power generation of a wind turbine based on fluid kinetic energy according to claim 3, characterized in that: The tension detection assembly (4) is a tension sensor (8), the outer end surface of the fixed end head (3) is a movable end surface, the tension sensor (8) is arranged in the fixed end head (3), and the outer end surface is connected with the movable end surface of the fixed end head (3).

5. The apparatus for increasing the power generation of a wind turbine based on fluid kinetic energy according to claim 4, characterized in that: The position driving assembly is arranged in the end head sliding groove (6), and the position driving assembly is matched with the fixed end head (3), and the position of the fixed end head (3) in the end head sliding groove (6) is adjusted by the position driving assembly.

6. A control method for a device for enhancing the power generation efficiency of a wind turbine based on fluid kinetic energy, using the device for enhancing the power generation efficiency of a wind turbine based on fluid kinetic energy as described in any one of claims 1-5, characterized in that: Including the following steps: S1, in the generator as a whole does not carry on the state of rotation, position drive assembly with fixed end (3) position movement, so that the fixed end (3) is in the end of the slot (6) the most inside end position; S2, in the action of wind driven vertical axis wind turbine fan blade (2) rotation, the control system detects the fan blade (2) rotation, so as to control the position drive assembly, the position drive assembly with fixed end (3) position movement; S3, at the same time, the tension detection assembly (4) to the acting element main body (5) applied to the tension detection, and is delivered to the control system, and combines the end of the circuit induction group delivered position information, so that the control system according to the information delivered combined with the circular motion formula calculation, judge the acting element main body (5) at this time the kinetic energy size; S4, when the fan blade (2) rotation has certain kinetic energy, the position drive assembly to remove the restriction of the acting element main body (5), so that the acting element main body (5) under the action of force along the end of the slot (6) movement, sliding to the end of the slot (6) the outer end position, so as to reach the vertical axis wind turbine starting state; S5, when the control system detects the fan power generation efficiency decreases, the acting element main body (5) will itself stored kinetic energy applied to the fan blade (2), so that the fan blade (2) obtain kinetic energy, the main purpose of this setting is to ensure that the fan blade (2) in the wind force a stage of time to reduce the process, the fan blade (2) due to the lack of force received and appear stagnation phenomenon; S6, when the acting element main body (5) kinetic energy consumption, the control system detects the vertical axis generator power generation efficiency decreases and until disappear, the control system to the position drive assembly, the position drive assembly to the acting element main body (5) traction, so that the acting element main body (5) moves to the end of the slot (6) the inner end position; S7, when the control system detects the vertical axis generator power generation, repeat the above S1-S6 steps, so as to complete the vertical axis wind turbine power generation operation.

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