A small wind turbine that is easy to maintain

Abstract

This invention relates to the field of wind power generation technology, and more particularly to a small wind turbine generator that is easy to maintain. A small wind turbine generator that is easy to maintain includes a base, fan blades, and a power generation unit mounted on the base; two fan blades are arranged on the upper side of the base; it also includes a connecting shaft; a hollow cylinder is arranged on the power generation unit; a pair of fixing blocks are arranged on the outer side of the hollow cylinder, located below each connecting ring; each fixing block is provided with a fixing rod for connecting the fan blades; the fan blades are fixed to the fixing rods. This invention uses an arc-shaped groove to drive two opposing second limiting rods to move horizontally towards the center of a rotating disk, ultimately driving the fixing blocks to move horizontally towards the center of the rotating disk; the fixing blocks drive all the fixing rods and fan blades to move horizontally relative to each other, completing the relative closure of the two fan blades.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a small wind turbine that is easy to maintain. Background Technology

[0002] In existing technologies, when encountering extreme weather such as typhoons and rainstorms, the fixed blades of wind turbines cannot be retracted, forcing them to continuously withstand extreme wind forces. This may cause the rotational speed to far exceed the rated speed of the generator, easily leading to overload and damage to the generator, resulting in economic losses and affecting power generation efficiency. When overhauling small wind turbines, the blades and connecting components must be disassembled one by one, and finally the blades to be repaired must be removed. The disassembly and assembly work is also affected by the wind conditions at the time, making the process time-consuming, labor-intensive, inefficient, and posing safety hazards. Summary of the Invention

[0003] To overcome the drawbacks of wind turbines that cannot be retracted during extreme weather, which can lead to overload and damage to the generator, and the high maintenance requirements of the blades, this invention provides a small wind turbine that is easy to maintain.

[0004] The technical implementation scheme of the present invention is as follows: A small wind turbine generator that is easy to maintain includes a base, fan blades, and a power generation unit mounted on the base; two fan blades are arranged on the upper side of the base; a connecting shaft is also included; a hollow cylinder is arranged on the power generation unit; a connecting block is rotatably connected to the hollow cylinder; a connecting shaft is rotatably connected to the center of the connecting block; a micro motor is arranged inside the hollow cylinder, and the output shaft of the micro motor is connected to the connecting shaft; several connecting rod positions are fixed on the connecting block, and the connecting rods are located on the outside of the hollow cylinder; several connecting rings are arranged longitudinally and rotatably on the outside of the hollow cylinder. Each connecting ring has two symmetrical rectangular blocks, and each connecting ring has two through holes for mounting with the connecting rod. A pair of fixing blocks are located on the outer side of the hollow cylinder, below each connecting ring. Each fixing block has a fixing rod for connecting the fan blade. Each fixing block has a slot for mounting the fixing rod. Each fixing rod has a first limiting rod. Each connecting ring has through slots at both ends, allowing the first limiting rod to slide within the slots. The connecting rod is fixed to the connecting ring. The fan blade is fixed to the fixing rod.

[0005] More preferably, an anti-detachment block is fixed to the top of each first limiting rod.

[0006] More preferably, it also includes fastening bolts; the fan blades are fitted onto both ends of the fixing rod through receiving grooves on the inner side, and the fixing rod has threaded grooves at both ends. The fan blades have through holes at positions corresponding to the threaded grooves, and when the fastening bolts are fitted onto the fixing rods, the through holes are aligned with the threaded grooves. The fastening bolts pass through the through holes of the fan blades from the outside and are then screwed into the threaded grooves of the fixing rods to fix the two together.

[0007] More preferably, the fan blades are coated with an anti-rust coating.

[0008] More preferably, a rubber ring is provided on the surface of the fastening bolt that contacts the fan blade.

[0009] More preferably, it also includes a second limiting rod and a rotating disk; the fixing block slides through the hollow cylinder and is slidably connected to the hollow cylinder; a second limiting rod is installed on the surface of each fixing block located in the internal area of ​​the hollow cylinder; several rotating disks are fixedly connected to the surface of the connecting shaft, and the rotating disks have arc-shaped grooves biased towards the center; the second limiting rod slides in the arc-shaped grooves.

[0010] More preferably, the rotating disk is slidably connected to the inner wall of the hollow cylinder.

[0011] More preferably, the edges of the fan blades are provided with sealing strips.

[0012] More preferably, the base has drainage grooves.

[0013] More preferably, the surface of the power generation section is inclined.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention realizes the horizontal limiting of the first limiting rod by the through groove to push the first limiting rod to move, and finally the first limiting rod drives all the fixed rods to move horizontally under the limitation of the fixed block, thereby driving the fan blades on both sides to move towards each other. By rotating and loosening the fastening bolt, the thread is disengaged from the fixing rod, and the fastening bolt no longer presses and locks the fan blade onto the fixing rod, thus releasing the fixation between the fan blade and the fixing rod. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first three-dimensional structure of the small wind turbine generator that is easy to maintain according to the present invention. Figure 2 This is a schematic diagram of a second three-dimensional structure of the small wind turbine generator that is easy to maintain according to the present invention. Figure 3 This is a schematic diagram of the first combined three-dimensional structure of the connecting ring and fixing rod of the present invention; Figure 4 This is a schematic diagram of a second combination of the connecting ring and the fixing rod of the present invention. Figure 5 This is a schematic diagram of the first combined three-dimensional structure of the second limiting rod and the rotating disk of the present invention; Figure 6 This is a schematic diagram of a second combination of the second limiting rod and the rotating disk of the present invention.

[0016] The above-mentioned drawings include the following reference numerals: 1-base, 2-generator, 3-fan blade, 101-connecting shaft, 102-connecting block, 103-connecting rod, 104-hollow cylinder, 105-connecting ring, 10501-through groove, 106-fixing block, 107-fixing rod, 108-first limiting rod, 109-fastening bolt, 201-second limiting rod, 202-rotating disc, 20201-arc groove. Detailed Implementation

[0017] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0018] Example 1: A small wind turbine generator that is easy to maintain includes a base 1, fan blades 3, and a generator unit 2 mounted on the base 1; two fan blades 3 are arranged on the upper side of the base 1; it also includes a connecting shaft 101, a connecting block 102, a connecting rod 103, a hollow cylinder 104, a connecting ring 105, a fixing block 106, a fixing rod 107, a first limiting rod 108, and fastening bolts 109; a hollow cylinder 104 is provided on the generator unit 2; the hollow cylinder 104 is rotatably connected to the connecting block 102; the connecting shaft 101 is rotatably connected to the center of the connecting block 102; a micro motor is provided inside the hollow cylinder 104, and the output shaft of the micro motor is connected to the connecting shaft 101; two connecting rods 103 are fixedly connected to the connecting block 102, and the connecting rods 103 are located on the outside of the hollow cylinder 104; the hollow cylinder 104... 4. Two connecting rings 105 are arranged longitudinally and rotatably on the outer side; each connecting ring 105 has two rectangular blocks symmetrically arranged on it, and each connecting ring 105 has two through holes that cooperate with the connecting rod 103 for installation; a pair of fixing blocks 106 are arranged on the outer side of the hollow cylinder 104 and below each connecting ring 105; a fixing rod 107 is slidably connected to each fixing block 106; each fixing block 106 has a slot to cooperate with the fixing rod 107 for fixed installation; a first limiting rod 108 is installed on each fixing rod 107; each connecting ring 105 has a through groove 10501 at both ends, and the first limiting rod 108 slides in the through groove 10501; the connecting rod 103 is fixedly connected to the connecting ring 105; the fan blade 3 is fixed to the fixing rod 107.

[0019] It also includes fastening bolts 109; the fan blade 3 is fitted onto both ends of the fixing rod 107 through the receiving groove on the inner side. The fixing rod 107 has threaded grooves at both ends. The fan blade 3 has a through-hole at the position corresponding to the threaded groove. When the fastening bolt 109 is fitted onto the fixing rod 107, the through-hole is aligned with the threaded groove. The fastening bolt 109 passes through the through-hole of the fan blade 3 from the outside and is screwed into the threaded groove of the fixing rod 107 to fix the two together.

[0020] The surface of fan blade 3 is coated with an anti-rust coating to prevent rust from affecting the stability of the installation.

[0021] A rubber ring is provided on the surface of the fastening bolt 109 that contacts the fan blade 3 to buffer and reduce pressure, thereby preventing the fastening bolt 109 from squeezing the surface of the fan blade 3 when tightening, and avoiding damage to the protective paint on the surface of the fan blade 3.

[0022] The wind power is received by two staggered fan blades 3. Under the action of the wind, the two fan blades 3 drive the hollow cylinder 104 to rotate, which in turn drives the generator 2. Finally, the kinetic energy brought by the wind is converted into electrical energy to realize wind power generation. When encountering extreme weather such as typhoons and rainstorms, the fan blades 3 cannot be retracted, which means that they need to withstand extreme wind force continuously. There is a probability that the rotation speed will far exceed the rated speed of the generator, which can easily lead to overload and damage to the generator, causing economic losses and affecting power generation efficiency. At the same time, the unfolded fan blades 3 may be blown away by strong winds, which brings serious safety hazards.

[0023] To solve the above problems, a wind speed sensor is installed on the connecting block 102. When the wind speed exceeds the normal value, the motor can be controlled to drive the connecting shaft 101 to rotate counterclockwise, causing the connecting block 102 and the connecting rod 103 to rotate counterclockwise synchronously with the connecting shaft 101. Subsequently, the connecting rod 103 drives the connecting ring 105 to rotate counterclockwise, so that during the rotation of all connecting rings 105, the first limiting rod 108 is horizontally limited by the through groove 10501, pushing the first limiting rod 108 to move. Finally, the first limiting rod 108 is moved. Rod 108 drives all fixed rods 107 to move horizontally under the limit of fixed block 106, thereby driving the fan blades 3 on both sides to move towards each other. Finally, when all fixed rods 107 and fan blades 3 on both sides change from a staggered state to a relative state and are retracted, the wind-receiving area of ​​fan blades 3 almost disappears, and connecting shaft 101 stops rotating. This realizes the retraction operation of wind turbine fan blades 3 under extreme wind conditions, avoiding damage to the generator and loss and hidden dangers such as fan blades 3 falling due to wind overload under extreme wind conditions.

[0024] Meanwhile, to meet the need for easy maintenance of small wind turbines, when it is necessary to disassemble the blade 3, the fastening bolt 109 is loosened by rotating it, so that the thread comes out of the fixing rod 107. The fastening bolt 109 no longer presses the blade 3 onto the fixing rod 107, releasing the fixation between the blade 3 and the fixing rod 107. Then, the blade 3 is manually grasped and pulled outward, realizing the quick disassembly of the blade 3, saving the time of disassembling the relatively complex blade 3 installation structure in the existing technology during maintenance.

[0025] Example 2, based on Example 1, such as Figures 5-6 As shown, it also includes a second limiting rod 201 and a rotating disk 202; the fixing block 106 passes through the hollow cylinder 104 and is slidably connected to the hollow cylinder 104; a second limiting rod 201 is installed on the surface of each fixing block 106 located in the internal area of ​​the hollow cylinder 104; two rotating disks 202 are fixedly connected to the surface of the connecting shaft 101, and the rotating disks 202 have arc-shaped grooves 20201 biased towards the center; the second limiting rod 201 slides in the arc-shaped grooves 20201.

[0026] The rotating disk 202 is slidably connected to the inner wall of the hollow cylinder 104, which improves the installation stability of the rotating disk 202.

[0027] The edge of the fan blade 3 is provided with a sealing strip, which improves the bonding effect after the two fan blades 3 are attached to each other and avoids the formation of gaps.

[0028] The base 1 has a drainage groove to prevent rainwater from accumulating inside the base 1 during rainy days.

[0029] The surface of the generator part 2 is sloped to prevent rainwater from accumulating on the surface of the generator part 2 casing and corroding the casing, causing rust.

[0030] Furthermore, after the two fan blades 3 are retracted, they only change from an initially staggered state to a relative state, and are not completely fitted together. There are still gaps between them. In windy weather, debris blown by the wind may enter and get stuck between the two relatively retracted fan blades 3, affecting the normal operation of the wind turbine.

[0031] To solve the above problems, a rotating disk 202 is added. When the connecting shaft 101 rotates counterclockwise to drive the connecting ring 105, it also drives the rotating disk 202. All rotating disks 202 rotate counterclockwise synchronously with the connecting shaft 101, driving two opposing second limiting rods 201 to move through the arc-shaped groove 20201. Because the second limiting rods 201 are fixed to the fixing block 106, and the fixing block 106 penetrates the wall of the hollow cylinder 104, the second limiting rods 201 will eventually move... Driven by the rotating disc 202, the fixed block 106 moves horizontally towards the center of the rotating disc 202. Therefore, in this embodiment, the fan blade 3 will move under the simultaneous drive of the fixed rod 107 and the fixed block 106. The movement trajectory of the fan blade 3 will change to move directly towards the center of the hollow cylinder 104, and finally complete the close-fitting of the two fan blades 3, reducing the gap between the two fan blades 3, preventing debris blown by the wind from entering and affecting the normal use of the wind turbine, and reducing the subsequent cleaning and maintenance costs.

[0032] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A small wind-driven generator with easy maintenance, comprising a base (1), a fan blade (3) and a power generation part (2) installed on the base (1); the upper side of the base (1) is provided with two fan blades (3); characterized in that: It also includes a connecting shaft (101); a hollow cylinder (104) is provided on the generator part (2); a connecting block (102) is rotatably connected to the hollow cylinder (104); the connecting shaft (101) is rotatably connected to the center of the connecting block (102); a micro motor is provided inside the hollow cylinder (104), and the output shaft of the micro motor is connected to the connecting shaft (101); several connecting rods (103) are fixed on the connecting block (102), and the connecting rods (103) are located on the outside of the hollow cylinder (104); several connecting rings (105) are arranged longitudinally and rotatably on the outside of the hollow cylinder (104); two rectangular blocks are symmetrically provided on each connecting ring (105), and two connecting rods (105) are provided on each connecting ring (105) and connected to the connecting rods (103). 103) Through holes for installation; a pair of fixing blocks (106) are provided on the outside of the hollow cylinder (104) and on the lower side of each connecting ring (105); a fixing rod (107) for connecting the fan blade (3) is provided on each fixing block (106); a slot is opened on each fixing block (106) to cooperate with the fixing rod (107) for fixed installation; a first limiting rod (108) is installed on each fixing rod (107); through slots (10501) are opened at both ends of each connecting ring (105), and the first limiting rod (108) slides in the through slot (10501); the connecting rod (103) is fixedly connected to the connecting ring (105); the fan blade (3) is fixed on the fixing rod (107).

2. A small wind turbine generator that is easy to maintain according to claim 1, characterized in that, Each first limit bar (108) has an anti-detachment block fixed to its top.

3. A small wind turbine generator that is easy to maintain according to claim 1, characterized in that, It also includes fastening bolts (109); the fan blade (3) is fitted onto both ends of the fixing rod (107) through the receiving groove on the inner side. The fixing rod (107) has threaded grooves at both ends. The fan blade (3) has a through-hole at the position corresponding to the threaded groove. When the fastening bolt (109) is fitted onto the fixing rod (107), the through-hole is aligned with the threaded groove. The fastening bolt (109) passes through the through-hole of the fan blade (3) from the outside and is screwed into the threaded groove of the fixing rod (107) to fix the two together.

4. A small wind turbine generator that is easy to maintain according to claim 3, characterized in that, The surface of the fan blade (3) is coated with an anti-rust coating.

5. A small wind turbine generator that is easy to maintain according to claim 4, characterized in that, A rubber ring is provided on the surface of the fastening bolt (109) that contacts the fan blade (3).

6. A small wind turbine generator that is easy to maintain according to claim 1, characterized in that, It also includes a second limiting rod (201) and a rotating disk (202); a fixed block (106) passes through the hollow cylinder (104) and is slidably connected to the hollow cylinder (104); a second limiting rod (201) is installed on the surface of each fixed block (106) located in the internal area of ​​the hollow cylinder (104); several rotating disks (202) are fixedly connected to the surface of the connecting shaft (101), and the rotating disks (202) have arc-shaped grooves (20201) biased towards the center; the second limiting rod (201) slides in the arc-shaped grooves (20201).

7. A small wind turbine generator that is easy to maintain according to claim 6, characterized in that, The rotating disk (202) is slidably connected to the inner wall of the hollow cylinder (104).

8. A small wind turbine generator that is easy to maintain according to any one of claims 1-7, characterized in that, The edge of the fan blade (3) is provided with a sealing strip.

9. A small wind turbine generator that is easy to maintain according to claim 1, characterized in that, The base (1) has a drainage groove.

10. A small wind turbine generator that is easy to maintain according to claim 1, characterized in that, The surface of the power generation part (2) is a slope.

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