Kinetic energy conversion device of wind driven generator

Abstract

The invention discloses a kinetic energy conversion device of a wind driven generator. The kinetic energy conversion device comprises a base table, a fixed column vertically arranged on the base table, a sleeve arranged on the fixed column in a sleeving mode and capable of rotating in the axial direction of the fixed column, and a plurality of fan blade frames evenly distributed on the sleeve. A plurality of lifting ropes are longitudinally arranged on one side of each fan blade frame at intervals, and each lifting rope is provided with a fan blade made of weather-resistant cloth. The blade surface width of the fan blades is larger than the distance between the two lifting ropes. A plurality of blocking nets are transversely arranged on the other side of the fan blade frame at intervals. The lifting ropes are arranged at intervals, and the multiple blocking nets are arranged in the fan blade frame, so that the fan blades can be unfolded and flatly laid on the blocking nets under the windward condition, and the wind resistance area of the fan blades is effectively increased; under the condition that the fan blades are not windward, an air channel for wind power to pass through can be formed between the adjacent fan blades, and therefore wind resistance generated when the fan blade frame rotates can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation devices, and in particular to a kinetic energy conversion device of a wind power generator. Background Art

[0002] A wind turbine is an energy conversion device that converts the kinetic energy of wind into mechanical energy, and then converts the mechanical energy into electrical energy. The blades of traditional wind turbines are all deployed and fixed. In strong winds, the deployed blades will rotate at high speed after being affected by the wind, which can easily damage the generator set.

[0003] In order to solve the above technical problems, application publication number CN113090450A discloses an adjustable fan blade assembly for wind power generation, which specifically discloses a pillar, a plurality of evenly distributed fan blades with adjustable fan size are arranged around the pillar, the fan blades include a rolling shutter door panel and a rolling shutter door panel frame cooperating with the rolling shutter door panel, and the rolling shutter door panel is retracted and extended by a power roller structure.

[0004] Although the above-mentioned adjustable wind blade assembly for wind power generation can realize the retraction and extension of the rolling shutter door panel through the power roller, thereby changing the wind receiving area of ​​the rolling shutter door panel, thereby preventing the rolling shutter door panel from causing damage to the generator set in strong wind weather, the adjustable wind blade assembly for wind power generation still has some shortcomings. For example, the rolling shutter door panel is an integrated plate structure, and under the influence of relatively small wind force, the generator seat can be driven to work through the wind receiving of the rolling shutter door panel; however, when the rolling shutter door panel is rotated to an angle where it is not exposed to the wind, since the rolling shutter door panel is integrated, the rolling shutter door panel will form a certain wind resistance, which means that a rolling shutter door panel at the wind receiving angle will be affected by the wind resistance when rotating, which will consume more wind energy, resulting in a lower efficiency in converting wind energy into mechanical energy.

[0005] Therefore, it is necessary to make further improvements to the prior art. Summary of the invention

[0006] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a kinetic energy conversion device for a wind turbine, which is equipped with lifting ropes at intervals and multiple blocking nets in the blade frame, so that the blades can be unfolded and laid flat on the blocking nets when facing the wind, and adjacent blades are partially overlapped after unfolding, thereby effectively increasing the wind resistance area of ​​the blades; when the blades are not facing the wind, wind ducts for wind to pass through can be formed between adjacent blades, thereby effectively reducing the wind resistance generated by the blade frame when rotating, thereby improving the efficiency of converting wind energy.

[0007] In order to achieve the above object, the technical solution of the present invention is:

[0008] A kinetic energy conversion device for a wind turbine generator, comprising a base, a fixing column vertically arranged on the base, a sleeve sleeved on the fixing column and rotatable along the axial direction of the fixing column, and a plurality of blade frames evenly distributed and arranged on the sleeve; a gear connected to an external power generation device is also arranged on the sleeve; a plurality of lifting ropes are longitudinally and spaced apart on one side of each of the blade frames, and a blade made of weather-resistant fabric is respectively arranged on each of the lifting ropes; the blade width of the blade is greater than the distance between two of the lifting ropes; A blocking net is provided on the other side of the fan blade frame; when the fan blade frame is at a windward angle, the multiple fan blades are unfolded and laid flat on the blocking net under the action of wind force, and the adjacent fan blades are partially overlapped after unfolding, so that the fan blade frame has a larger wind resistance area; when the fan blade frame is at a non-windward angle, the multiple fan blades are separated from the blocking net under the action of wind force, and an air duct is formed between two adjacent fan blades, so that airflow can pass through the air duct, thereby effectively reducing the wind resistance generated by the fan blade frame when it rotates.

[0009] Furthermore, motors are provided on the sleeve and on both sides of the bottom of the fan blade frame, and the output ends of the two motors are respectively connected to roller shafts for winding up the lifting ropes, and the roller shafts can wind up or unfold the fan blades according to the size of the wind force. Through the above arrangement, the fan blades can be rolled up or unfolded by the motor drive under different wind forces to ensure that the unfolded fan can increase the windward area, thereby capturing more wind energy; the rolled up fan blades can reduce the windward area, thereby avoiding damage to the kinetic energy conversion device of the wind turbine in strong wind weather.

[0010] Furthermore, the roller shaft includes a first roller shaft and a second roller shaft, one end of the lifting rope is connected to the first roller shaft, and the other end thereof extends upward through the top end of the fan blade frame and then extends downward to be connected to the second roller shaft. Through the above arrangement, the first roller shaft and the second roller shaft can cooperate with each other to reel in and unreel the lifting rope.

[0011] Furthermore, a plurality of fixing seats for fixing the first roller shaft and the second roller shaft are respectively provided on both sides of the bottom of the fan blade frame. Through the above arrangement, the first roller shaft and the second roller shaft can be more stable when rotating and winding the lifting rope.

[0012] Furthermore, the fan blades are composed of a plurality of blades sleeved on the lifting rope.

[0013] Furthermore, a bearing is provided between the fixing column and the sleeve. Through the above arrangement, the sleeve can rotate along the axial direction of the fixing column.

[0014] Furthermore, a connecting rod is provided between two adjacent blade frames. Through the above arrangement, the connection of the plurality of blade frames through the connecting rod makes the structure more stable.

[0015] Furthermore, a water-blocking cover for shielding rainwater is also provided on the top of the sleeve. Through the above arrangement, rainwater can be prevented from entering the interior of the sleeve.

[0016] Furthermore, the cross section of the water retaining cover is conical. Through the above arrangement, rainwater will not be deposited on the surface of the water retaining cover.

[0017] Furthermore, a lightning rod is also provided at the upper end of the water retaining cover. Through the above arrangement, the kinetic energy conversion device of the wind turbine generator can be prevented from being struck by lightning in thunderstorm weather.

[0018] The beneficial effects of the present invention are:

[0019] (1) The present invention arranges lifting ropes at intervals and provides a plurality of blocking nets in the fan blade frame, so that the fan blades can be unfolded and laid flat on the blocking nets when facing the wind, and adjacent fan blades are partially overlapped after unfolding, thereby effectively increasing the wind resistance area of ​​the fan blades; when the fan blades are not facing the wind, wind ducts for wind to pass through can be formed between adjacent fan blades, thereby effectively reducing the wind resistance generated by the fan blade frame when it rotates, thereby improving the efficiency of converting wind energy.

[0020] (2) The present invention provides a motor and a roller shaft on both sides of the bottom of the fan blade frame, so that under different wind conditions, the two roller shafts can cooperate with each other to unwind and reel in the lifting rope, thereby synchronously driving the fan blades to retract or unfold, and then under strong wind conditions, the unfolded fan blades can be retracted to prevent the wind turbine from being damaged when the fan blades rotate at high speed due to strong wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial structural exploded schematic diagram of the present invention;

[0023] Figure 3 It is a partial structural schematic diagram of the present invention Figure 1 ;

[0024] Figure 4 yes Figure 3 A magnified view of point A in the figure;

[0025] Figure 5 It is a partial structural schematic diagram of the present invention Figure 2 ;

[0026] Figure 6 is a schematic diagram of the fan blades of the present invention being deployed when the fan blade frame is not at a windward angle;

[0027] Figure 7 It is a schematic diagram of the fan blades of the fan blade frame of the present invention being unfolded and laid out when the fan blade frame is at a windward angle.

[0028] Reference numerals:

[0029] 1. Abutment; 2. Fixed column; 3. Sleeve;

[0030] 4. Fan blade frame; 41. Lifting rope; 42. Fan blade; 43. Blocking net; 45. Air duct;

[0031] 5. Motor; 51. Roller shaft; 510. First roll shaft; 511. Second roll shaft; 52. Fixed seat;

[0032] 6. Gears;

[0033] 7. Connecting rod;

[0034] 8. Water retaining cover;

[0035] 9. Lightning rod;

[0036] 10. Bearings. DETAILED DESCRIPTION

[0037] The invention is further described below in conjunction with the accompanying drawings and specific embodiments. The following description is only exemplary and does not limit the protection scope of the invention.

[0038] like Figure 1-Figure 2 As shown, a kinetic energy conversion device of a wind turbine comprises a base 1, a fixed column 2 vertically arranged on the base 1, a sleeve 3 sleeved on the fixed column 2 and rotatable along the axial direction of the fixed column 2, and a plurality of blade frames 4 evenly distributed on the sleeve 3; in the present embodiment, four blade frames 4 are provided, one ends of the four blade frames 4 are respectively fixed on the side walls of the sleeve 3, and the other ends thereof are respectively extended in the horizontal direction, wherein the four blade frames 4 can rotate along the axial direction of the fixed column 2 under the action of wind force.

[0039] like Figure 1-Figure 2 As shown, a gear 6 connected to an external power generation device is also provided on the sleeve 3; specifically, the gear 6 is arranged at the lower end of the sleeve 3; through the above arrangement, the kinetic energy generated by the fan blades 42 after facing the wind can be converted into mechanical energy, and connected to the external power generation device through the gear 6, and then the mechanical energy can be further converted into electrical energy.

[0040] like Figure 1-Figure 7As shown, a plurality of lifting ropes 41 are longitudinally and spaced apart on one side of each fan blade frame 4, and a fan blade 42 made of weather-resistant fabric is disposed on each lifting rope 41; specifically, the fan blade 42 is composed of a plurality of blades sleeved on the lifting rope 41. Through the above arrangement, the fan blade can be naturally bent or unfolded according to the change of wind speed under the action of wind force.

[0041] The blade width of the fan blade 42 is greater than the distance between the two lifting ropes 41 .

[0042] like Figure 5 As shown, a blocking net 43 is provided on the other side of the blade frame 4.

[0043] like Figure 7 As shown, in this embodiment, when the fan blade frame 4 is at a windward angle, multiple fan blades 42 are unfolded under the action of wind force and laid flat on the blocking net 43, and adjacent fan blades 42 are partially overlapped after unfolding, so that the fan blade frame 4 has a larger wind resistance area, and the fan blade frame 4 can perform circular motion relative to the fixed column 2.

[0044] like Figure 6 As shown, when the blade frame 4 is at a non-windward angle, a plurality of blades 42 are separated from the blocking net 43 under the action of wind force, and an air duct 45 is formed between two adjacent blades 42, so that airflow can pass through the air duct 45, thereby effectively reducing the wind resistance generated by the blade frame 4 when rotating. Specifically, when one of the blade frames 4 has a windward angle, the other blade frames 4 are relatively not at a suitable windward angle; at this time, the blades 42 at the non-windward angle are affected by the wind force generated by the rotation of the sleeve 3, and are respectively unfolded according to the wind direction, so that an air duct 45 for wind force to pass through is formed between adjacent blades 42, thereby reducing the wind resistance generated by the blade frame 4 when rotating, thereby improving the efficiency of converting wind energy into mechanical energy.

[0045] like Figure 3-Figure 5As shown, motors 5 are respectively provided on the sleeve 3 and on both sides of the bottom of the fan blade frame 4, and the output ends of the two motors 5 are respectively connected to roller shafts 51 for winding up the lifting rope 41, and the roller shaft 51 can wind up or unfold the fan blades 42 according to the size of the wind force; specifically, the roller shaft 51 includes a first roller shaft 510 and a second roller shaft 511, one end of the lifting rope 41 is connected to the first roller shaft 510, and the other end thereof extends upward through the top end of the fan blade frame 4 and then extends downward to be connected to the second roller shaft 511. In this embodiment, the first roller shaft 510 and the second roller shaft 511 can be driven by the motor 5 to respectively cooperate to reel in or reel in the lifting rope 41; specifically, when the first roller shaft 510 is reeling in, the second roller shaft 511 will cooperate to unreel; when the first roller shaft 510 is unreeling, the second roller shaft 511 will cooperate to reel in; through the above-mentioned arrangement, the lifting rope 41 can be reeled in under strong wind conditions. At this time, the fan blades 42 are pulled by the lifting rope 41 to form a contraction, so that the wind-receiving area of ​​the fan blades 42 is correspondingly reduced, thereby avoiding the wind turbine from being easily damaged when the fan blades 42 rotate at high speed; at the same time, the lifting rope 41 can be unreeled under low wind conditions. At this time, the fan blades 42 are pulled by the lifting rope 41 to form an expansion, thereby making the wind-receiving area of ​​the fan blades 42 correspondingly larger, so that the expanded fan blades 42 can capture wind energy well.

[0046] like Figure 3-Figure 5 As shown, a plurality of fixing seats 52 for fixing the first roller shaft 510 and the second roller shaft 511 are respectively provided on both sides of the bottom of the blade frame 4. In this embodiment, a plurality of fixing seats 52 are respectively provided on one side corresponding to the first roller shaft 510 and one side corresponding to the second roller shaft 511, and the first roller shaft 510 and the second roller shaft 511 respectively pass through the fixing seats 52 and can rotate in the fixing seats 52. Through the above arrangement, the first roller shaft 510 and the second roller shaft 511 can be more stable when rotating and winding the lifting rope 41.

[0047] like Figure 2 As shown, a bearing 10 is provided between the fixed column 2 and the sleeve 3. Through the above arrangement, the sleeve 3 can rotate along the axial direction of the fixed column 2.

[0048] like Figure 1 As shown, a connecting rod 7 is further provided between two adjacent blade frames 4; through the above arrangement, the multiple blade frames 4 are connected through the connecting rod 7, and the structure thereof is more stable.

[0049] like Figure 1-Figure 2 As shown, a water-blocking cover 8 for shielding rainwater is also provided on the top of the sleeve 3; through the above arrangement, rainwater can be prevented from entering the interior of the sleeve 3.

[0050] Specifically, the cross section of the water retaining cover 8 is conical; through the above arrangement, rainwater will not be deposited on the surface of the water retaining cover 8 .

[0051] like Figure 1-Figure 2 As shown, a lightning rod 9 is also provided on the water retaining cover 8; through the above arrangement, the kinetic energy conversion device of the wind turbine generator can be prevented from being struck by lightning in thunderstorm weather.

[0052] In summary, the fan blades 42 can naturally adjust their unfolded angles according to the change of the wind receiving angle, so that they can be unfolded and laid flat on the blocking net 43 when receiving wind, thereby effectively increasing the wind receiving area; in the case of not receiving wind, an air duct can be formed between adjacent fan blades 42, thereby reducing the wind receiving area, and further reducing the wind resistance generated by the fan blade frame 4 when rotating;

[0053] In addition, by providing a motor 5 and a roller shaft 51 on both sides of the bottom of the fan blade frame 4, the fan blade 42 can be rolled up or unfolded under different wind conditions.

[0054] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims and equivalent technologies of the present invention, the present invention is also intended to include these changes and modifications.

Claims

1. A kinetic energy conversion device for a wind turbine, characterized in that: It comprises a base, a fixing column vertically arranged on the base, a sleeve sleeved on the fixing column and rotatable along the axial direction of the fixing column, and a plurality of fan blade frames evenly distributed on the sleeve; a gear connected to an external power generation device is also arranged on the sleeve; A plurality of lifting ropes are longitudinally and spaced apart on one side of each of the fan blade frames, and a fan blade made of weather-resistant fabric is respectively arranged on each of the lifting ropes; The blade width of the fan blade is greater than the distance between the two lifting ropes; A blocking net is provided on the other side of the fan blade frame; When the fan blade frame is at a windward angle, the plurality of fan blades are unfolded and laid flat on the blocking net under the action of wind force, and the adjacent fan blades partially overlap after unfolding, so that the fan blade frame has a larger wind resistance area; When the fan blade frame is at a non-windward angle, the plurality of fan blades detach from the blocking net under the action of wind, and an air duct is formed between two adjacent fan blades so that air can pass through the air duct, thereby effectively reducing the wind resistance generated by the fan blade frame when it rotates.

2. The kinetic energy conversion device of a wind turbine according to claim 1, characterized in that: Motors are provided on the sleeve and on both sides of the bottom of the fan blade frame. The output ends of the two motors are respectively connected to roller shafts for winding up the lifting ropes. The roller shafts can wind up or unfold the fan blades according to the size of the wind force.

3. The kinetic energy conversion device of a wind turbine according to claim 2, characterized in that: The roller shaft includes a first roller shaft and a second roller shaft. One end of the lifting rope is connected to the first roller shaft, and the other end thereof extends upward through the top end of the fan blade frame and then extends downward to be connected to the second roller shaft.

4. The kinetic energy conversion device of a wind turbine according to claim 3, characterized in that: A plurality of fixing seats for fixing the first roller shaft and the second roller shaft are respectively arranged on both sides of the bottom of the fan blade frame.

5. The kinetic energy conversion device of a wind turbine according to claim 1, characterized in that: The fan blades are composed of a plurality of blades sleeved on the lifting rope.

6. The kinetic energy conversion device of a wind turbine according to claim 1, characterized in that: A bearing is provided between the fixing column and the sleeve.

7. The kinetic energy conversion device of a wind turbine according to claim 1, characterized in that: A connecting rod is also provided between two adjacent blade frames.

8. The kinetic energy conversion device of a wind turbine according to claim 1, characterized in that: A water-blocking cover for shielding rainwater is also arranged on the top of the sleeve.

9. The kinetic energy conversion device of a wind turbine according to claim 8, characterized in that: The cross section of the water retaining cover is conical.

10. The kinetic energy conversion device of a wind turbine according to claim 8, characterized in that: A lightning rod is also provided at the upper end of the water retaining cover.

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