Kinetic energy conversion device of wind driven generator

Abstract

The utility model 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 which is arranged on the fixed column in a sleeving mode and can rotate in the axial direction of the fixed column, and a plurality of fan blade frames which are evenly distributed and arranged 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. Due to the fact that the lifting ropes are arranged at intervals and the blocking nets are arranged in the fan blade frame, 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 utility model relates to the technical field of wind power generation devices, 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 wind kinetic energy into mechanical energy, and then converts that mechanical energy into electrical energy. Traditional wind turbine blades are deployed and fixed. In strong winds, the deployed blades rotate at high speeds, potentially damaging the generator.

[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, and a plurality of evenly distributed fan blades with adjustable fan size are provided around the pillar. The fan blades include a rolling shutter door panel and a rolling shutter plate frame cooperating with the rolling shutter door panel. The rolling shutter door panel is retracted and extended by a power roller structure.

[0004] Although the above-mentioned adjustable fan 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 fan blade assembly for wind power generation still has some shortcomings. For example, the rolling shutter door panel is an integrated plate structure. Under the influence of relatively small wind force, the wind-receiving structure of the rolling shutter door panel can drive the generator seat to work; 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, it will cause the rolling shutter door panel to form a certain amount of wind resistance, which means that the 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 existing technology. Utility Model Content

[0006] In response to the problems existing in the above-mentioned prior art, the purpose of the present utility model is to provide a kinetic energy conversion device for a wind turbine, which is arranged by spacing the lifting ropes and arranging a plurality of blocking nets in the fan blade frame, so that the fan blades can be unfolded and laid flat on the blocking net when facing the wind, and the 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, an air duct for wind to pass through can be formed between the adjacent fan blades, thereby effectively reducing the wind resistance generated by the fan blade frame during rotation, thereby improving the efficiency of converting wind energy.

[0007] In order to achieve the above purpose, the technical solution of the utility model 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 provided 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 provided 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, multiple fan blades are unfolded and laid flat on the blocking net under the action of wind, and 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, multiple fan blades are separated from the blocking net under the action of wind, 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, located on both sides of the bottom of the fan frame. The output ends of the two motors are connected to roller shafts for winding the lifting ropes. The roller shafts can reel in or out the fan blades according to the strength of the wind. Through this arrangement, the fan blades can be reeled in or out by the motors under different wind conditions, ensuring that the fan blades can increase the windward area when deployed, thereby capturing more wind energy; and that the fan blades can reduce the windward area when reeled, thereby preventing damage to the kinetic energy conversion device of the wind turbine in strong winds.

[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 frame and then extends downward to connect 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 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 post and the sleeve. Through the above arrangement, the sleeve can rotate along the axial direction of the fixing post.

[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 inside of the sleeve.

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

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

[0018] The beneficial effects of the utility model are:

[0019] (1) The utility model 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 partially overlap 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 utility model 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 retract the unfolded fan blades under strong wind conditions to prevent the fan blades from causing damage to the wind turbine when rotating 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 utility model;

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

[0023] Figure 3 This is a partial structural diagram of the utility model Figure 1 ;

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

[0025] Figure 5 This is a partial structural diagram of the utility model Figure 2 ;

[0026] Figure 6 This is a schematic diagram of the fan blades of the utility model 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 utility model when the fan blade frame is at a windward angle and the fan blades are unfolded and laid out.

[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 roller shaft; 511. Second roller shaft; 52. Fixed seat;

[0032] 6. Gear;

[0033] 7. Connecting rod;

[0034] 8. Water retaining cover;

[0035] 9. Lightning rod;

[0036] 10. Bearings. DETAILED DESCRIPTION

[0037] The utility model will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely illustrative and does not limit the scope of protection of the utility model.

[0038] like Figure 1-Figure 2 As shown, a kinetic energy conversion device of a wind turbine includes 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 this embodiment, four blade frames 4 are provided, one end of the four blade frames 4 is respectively fixed on the side wall of the sleeve 3, and the other end thereof extends 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.

[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 frame 4. A fan blade 42 made of weather-resistant fabric is mounted on each lifting rope 41. Specifically, the fan blade 42 is composed of multiple blades sleeved on the lifting rope 41. This arrangement allows the fan blades to naturally bend or unfold according to changes in wind speed under the action of wind.

[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 and spread 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, multiple 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 air flow can pass through the air duct 45, thereby effectively reducing the wind resistance generated by the blade frame 4 when it rotates. Specifically, when one of the blade frames 4 has an angle facing the wind, 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 it rotates, thereby improving the efficiency of converting wind energy into mechanical energy.

[0045] like Figure 3-Figure 5As shown, motors 5 are provided on the sleeve 3 and on both sides of the bottom of the fan blade frame 4. The output ends of the two motors 5 are respectively connected to roller shafts 51 for winding up the lifting rope 41. 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 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 rewind the lifting rope 41; specifically, when the first roller shaft 510 is reeling, 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; 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 fan blades 42 from easily causing damage to the wind turbine when the fan blades 42 rotate at high speed; at the same time, the lifting rope 41 can be unreeled when the wind force is relatively small. At this time, the fan blades 42 are pulled by the lifting rope 41 to form an unfolding, so that the wind-receiving area of ​​the fan blades 42 becomes correspondingly larger, which makes the unfolded fan blades 42 able to capture wind energy well.

[0046] like Figure 3-Figure 5 As shown, multiple 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 fan frame 4. In this embodiment, multiple fixing seats 52 are respectively provided on one side corresponding to the first roller shaft 510 and the other side corresponding to the second roller shaft 511. The first roller shaft 510 and the second roller shaft 511 respectively pass through the fixing seats 52 and can rotate within the fixing seats 52. This arrangement ensures that the first roller shaft 510 and the second roller shaft 511 are 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 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 changes in the wind angle, so that they can unfold and lay flat on the blocking net 43 when exposed to wind, thereby effectively increasing the wind-exposed area; in the absence of wind, air ducts can be formed between adjacent fan blades 42, thereby reducing the wind-exposed 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 blades 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: The fan 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 provided 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 provided 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 under the action of wind and laid flat on the blocking net, and 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, multiple 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 during rotation.

2. The kinetic energy conversion device for 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 for 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 for 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 provided on both sides of the bottom of the fan blade frame.

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

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

9. The kinetic energy conversion device for 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 for 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.

Images