Movable blade of large horizontal-axis wind turbine

Abstract

The utility model relates to the field of power generation, in particular to a movable blade of a large horizontal-axis wind turbine. The movable blade of the large horizontal-axis wind turbine comprises a hub, a plurality of blades are arranged on the peripheral side of the hub, and the side, close to the hub, of each blade is rotationally connected with the hub. According to the movable blade of the large-scale horizontal-axis wind driven generator provided by the utility model, the retractable assembly is arranged, and the two auxiliary blades can slide out from the two sides of the blade through the retractable assembly, so that the width of the blade is increased, the wind capturing area can be increased, and the wind driven generator can capture more wind energy under the condition of the same wind speed; and under the condition of high wind speed, the auxiliary blades can be retracted to reduce wind resistance, and under the condition of low wind speed, the auxiliary blades can slide out to increase the wind catching area, so that the maximum utilization of wind energy is realized, and the wind power generation device can be suitable for different wind speeds.

Description

Technical Field

[0001] The utility model relates to the field of power generation, in particular to a movable blade of a large horizontal axis wind generator. Background Art

[0002] The movable blades of wind turbines play a key role in the energy conversion process. First, the blades capture wind energy and convert it into mechanical energy to drive the generator. The design of the blades directly affects the energy conversion efficiency. By optimizing the shape, length and angle of the blades, the wind capture capacity can be maximized. Secondly, the blades can adjust the output power of the generator to adapt to changes in wind speed, thereby stabilizing the power output. Thirdly, the blade material must have high strength, fatigue resistance and corrosion resistance to cope with the needs of long-term work in harsh environments. Most of the existing blades have a fixed windward area and are difficult to adjust. Blades with a fixed windward area cannot fully utilize wind energy under low wind speed conditions. Under high wind speed conditions, blades with a fixed windward area may not be able to adapt to changes in high wind speeds, resulting in a decrease in energy conversion efficiency.

[0003] Therefore, it is necessary to provide a new movable blade of a large horizontal axis wind turbine to solve the above technical problems. Utility Model Content

[0004] In order to overcome the defects of the prior art, a movable blade of a large horizontal axis wind turbine is provided to solve the above problems.

[0005] The movable blades of a large horizontal axis wind turbine provided by the utility model include: a hub; a plurality of blades are arranged on the peripheral side of the hub, and a side of each blade close to the hub is rotatably connected to the hub; wherein two auxiliary blades are slidably connected in each of the blades, and a retractable assembly capable of extending and retracting the auxiliary blades is arranged between the two auxiliary blades, and the width of the blades can be increased by the retractable assembly; a variable pitch assembly is arranged in the hub, and the angle of the blade can be changed by the variable pitch assembly.

[0006] Preferably, the retracting and releasing assembly includes a sliding rod that is slidably connected to the blade, and the sliding rod is located between the two auxiliary blades, sliding rod grooves are provided on both sides of the sliding rod, and the two auxiliary blades have auxiliary blade grooves on the side close to the sliding rod, and multiple support rods are rotatably connected in the two sliding rod grooves, and each support rod is rotatably connected to the two auxiliary blade grooves on the side away from the sliding rod, a transmission rod is connected to one end of the sliding rod, and a first driving member for driving the transmission rod to reciprocate is installed at one end in the blade.

[0007] Preferably, the retractable assembly also includes a plurality of limit blocks installed on the inner top wall and inner bottom wall of the blade, and the plurality of limit blocks are respectively located on both sides of the blade, and the top and bottom of the two auxiliary blades are provided with limit grooves corresponding to the limit blocks.

[0008] Preferably, both sides of the blade are provided with sliding grooves for the auxiliary blades to slide.

[0009] Preferably, a side of each blade close to the hub is connected to a rotor, and a side of each rotor away from the blade passes through the hub and is connected to an adjustment plate.

[0010] Preferably, the variable pitch assembly includes a screw rotatably connected to the wheel hub, the outer side of the screw is threadedly connected to a screw sleeve, the outer top of the screw sleeve is rotatably connected to a plurality of traction rods, and the number of traction rods corresponds to the number of adjustment plates, one end of the traction rod away from the screw sleeve is connected to the edge of one side of the adjustment plate, and a second driving member for driving the screw to rotate is installed at the bottom located in the wheel hub.

[0011] Compared with the related art, the movable blades of the large horizontal axis wind turbine provided by the utility model have the following beneficial effects:

[0012] The utility model is provided with a retractable component, and the two auxiliary blades can slide out from the two sides of the blade through the retractable component, thereby increasing the width of the blade, and then the wind catching area can be increased, so that under the same wind speed conditions, the wind turbine can capture more wind energy, thereby improving the power generation efficiency; under high wind speed conditions, the auxiliary blades can be retracted to reduce wind resistance, and under low wind speed conditions, the auxiliary blades can be slid out to increase the wind catching area, thereby realizing the maximum utilization of wind energy and being suitable for different wind speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural schematic diagram of a preferred embodiment of the movable blades of a large horizontal axis wind turbine provided by the utility model;

[0014] Figure 2 for Figure 1 The schematic diagram of the structure of the blade shown;

[0015] Figure 3 for Figure 1 A schematic diagram of the structure of the retractable assembly shown;

[0016] Figure 4 for Figure 1 The structural schematic diagram of the variable pitch assembly is shown.

[0017] Numbers in the figure: 1, wheel hub; 2, blade; 21, slide rod; 22, support rod; 23, transmission rod; 24, limit block; 25, limit groove; 3, auxiliary blade; 4, rotating head; 5, adjustment plate; 6, screw rod; 61, screw sleeve; 62, traction rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0020] The embodiment of the utility model provides movable blades of a large horizontal axis wind turbine, and the movable blades of the large horizontal axis wind turbine include: a hub 1; a plurality of blades 2 are arranged on the circumferential side of the hub 1, and the side of each blade 2 close to the hub 1 is rotatably connected to the hub 1; wherein, two auxiliary blades 3 are slidably connected in each blade 2, and a retractable assembly capable of extending and retracting the auxiliary blades 3 is arranged between the two auxiliary blades 3, and the width of the blade 2 can be increased by the retractable assembly; a variable pitch assembly is arranged in the hub 1, and the angle of the blade can be changed by the variable pitch assembly, and both sides of the blade 2 are provided with sliding grooves for the auxiliary blades 3 to slide.

[0021] It should be noted that one end of the blade 2 is rotatably connected to the hub 1 so that the blade 2 can rotate with the hub 1. Slide grooves are provided on both sides of the blade 2 for the sliding of the auxiliary blades 3. The design of the auxiliary blades 3 can increase the effective width of the blades 2 when extended and retracted, thereby improving the energy capture efficiency. The retractable assembly is responsible for controlling the extension and retraction of the auxiliary blades 3, and the width of the blades can be increased or decreased by the retractable assembly. The variable pitch assembly is used to adjust the angle of the blades 2 to optimize the performance of the wind turbine at different wind speeds and directions. By changing the windward angle of the blades, the energy capture efficiency can be maximized.

[0022] In an embodiment of the utility model, the retractable assembly includes a slide bar 21 that is slidably connected to the blade 2, and the slide bar 21 is located between the two auxiliary blades 3. Slide bar grooves are provided on both sides of the slide bar 21, and the two auxiliary blades 3 are provided with auxiliary blade grooves on the side close to the slide bar 21. A plurality of support rods 22 are rotatably connected in the two slide bar grooves, and each support rod 22 is rotatably connected to the two auxiliary blade grooves on the side away from the slide bar 21. A transmission rod 23 is connected to one end of the slide bar 21, and a first driving member for driving the transmission rod 23 to reciprocate is installed at one end of the blade 2. The retractable assembly also includes a plurality of limit blocks 24 installed on the inner top wall and inner bottom wall of the blade 2, and the plurality of limit blocks 24 are respectively located on both sides of the blade 2, and the top and bottom of the two auxiliary blades 3 are provided with limit grooves 25 corresponding to the limit blocks 24.

[0023] It should be noted that the slide bar 21 is slidably connected in the blade 2 and is located between the two auxiliary blades 3. The slide bar 21 is used for smooth sliding between the auxiliary blades 3. Slide bar grooves are provided on both sides of the slide bar 21, and these grooves are used to install the support rod 22 so that the support rod 22 can rotate freely on the slide bar 21. The two auxiliary blades 3 are provided with auxiliary blade grooves on the side close to the slide bar 21. These grooves correspond to the slide bar grooves and are used for the rotation connection of the support rod 22. The design of the auxiliary blade grooves ensures that the support rod 22 can rotate freely between the auxiliary blade 3 and the slide bar 21, so that the auxiliary blade 3 can be extended and retracted with the movement of the slide bar 21. One end of the slide bar 21 is connected to a transmission rod 23, and the transmission rod 23 reciprocates through a first driving member. The first driving member can be a hydraulic cylinder or other device that can provide reciprocating power to drive the extension and retraction of the slide bar 21 and the auxiliary blade 3. The retractable assembly also includes a plurality of limit blocks 24, which are respectively mounted on the inner top wall and the inner bottom wall of the blade 2 and are located on both sides of the inside of the blade 2. The function of the limit blocks 24 is to limit the movement range of the auxiliary blades 3 to ensure that the auxiliary blades 3 do not exceed the design range during the extension and retraction process. The retractable assembly achieves stable extension and retraction of the auxiliary blades 3 through the coordinated work of the slide bar 21, the support rod 22, the transmission rod 23, the limit blocks 24 and the limit grooves 25. The first driving member provides power to drive the reciprocating movement of the slide bar 21 through the transmission rod 23, thereby driving the extension and retraction of the auxiliary blades 3. At the same time, the design of the limit blocks 24 and the limit grooves 25 ensures the stability and accurate positioning of the auxiliary blades during the extension and retraction process, which not only improves the energy capture efficiency of the wind turbine, but also ensures the reliability and stability of its operation.

[0024] In an embodiment of the utility model, each blade 2 is connected to a rotor 4 on one side close to the hub 1, and each rotor 4 passes through the hub 1 and is connected to an adjustment plate 5 on one side away from the blade 2. The pitch assembly includes a screw rod 6 rotatably connected to the hub 1, and the outer side of the screw rod 6 is threadedly connected to a thread sleeve 61. The outer top of the thread sleeve 61 is rotatably connected to a plurality of traction rods 62, and the number of traction rods 62 corresponds to the number of adjustment plates 5. One end of the traction rod 62 away from the thread sleeve 61 is connected to the edge of one side of the adjustment plate 5, and a second driving member for driving the screw rod 6 to rotate is installed at the bottom located in the hub 1.

[0025] It should be noted that: each blade 2 is connected to a rotor 4 on one side close to the hub 1. The design of the rotor 4 ensures that it can be connected between the blade and the hub, and has sufficient strength to withstand the rotation and wind pressure of the blade. The side of the rotor 4 away from the blade 2 passes through the hub 1 and is connected to an adjustment plate 5, and the design of the adjustment plate 5 ensures that it can control the angle of the blade 2. The pitch assembly includes a screw 6 rotatably connected to the hub 1. The design of the screw must ensure that it can rotate smoothly in the hub, and the adjustment function is achieved through a threaded connection. The outer side of the screw 6 is threadedly connected to a wire sleeve 61, allowing the wire sleeve 61 to move on the screw 6. The outer top of the wire sleeve 61 is rotatably connected to multiple traction rods 62, and the number of traction rods 62 corresponds to the number of adjustment plates 5. The end of the traction rod 62 away from the wire sleeve 61 is connected to the edge of one side of the adjustment plate 5, and the traction rod 62 can withstand the force generated during the adjustment process and transmit torque between the adjustment plate 5 and the wire sleeve 61. A second driving member for driving the screw 6 to rotate is installed at the bottom of the hub 1. The second driving member is an electric motor. Through the coordinated work of the rotating head 4, the adjusting plate 5, the screw 6, the wire sleeve 61 and the traction rod 62, the pitch assembly can adjust the angle of the blade 2, thereby optimizing the wind capture efficiency. The screw 6 rotates under the action of the second driving member, drives the traction rod 62 through the wire sleeve 61, and then adjusts the angle of the adjusting plate 5. The adjusting plate 5 adjusts the angle of the blade 2 through the rotating head 4 to achieve the pitch function.

[0026] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A movable blade of a large horizontal axis wind turbine, characterized in that: include: Wheel hub (1); A plurality of blades (2) are arranged on the circumferential side of the hub (1), and a side of each blade (2) close to the hub (1) is rotatably connected to the hub (1); Wherein, two auxiliary blades (3) are slidably connected in each of the blades (2), and a retractable component capable of extending and retracting the auxiliary blades (3) is provided between the two auxiliary blades (3), and the width of the blade (2) can be increased by the retractable component; A pitch-changing assembly is arranged inside the hub (1), and the angle of the blade can be changed through the pitch-changing assembly.

2. The movable blade of a large horizontal axis wind turbine according to claim 1, characterized in that: The retractable assembly comprises a slide bar (21) slidably connected to the inside of the blade (2), and the slide bar (21) is located between the two auxiliary blades (3), slide bar grooves are provided on both sides of the slide bar (21), and the two auxiliary blades (3) are provided with auxiliary blade grooves on the side close to the slide bar (21), and a plurality of support rods (22) are rotatably connected in the two slide bar grooves, and the side of each support rod (22) away from the slide bar (21) is respectively rotatably connected to the two auxiliary blade grooves, and a transmission rod (23) is connected to one end of the slide bar (21), and a first driving member for driving the transmission rod (23) to reciprocate is installed at one end of the blade (2).

3. The movable blade of a large horizontal axis wind turbine according to claim 2, characterized in that: The retractable assembly further comprises a plurality of limit blocks (24) mounted on the inner top wall and the inner bottom wall of the blade (2), and the plurality of limit blocks (24) are respectively located on both sides of the blade (2), and the tops and bottoms of the two auxiliary blades (3) are both provided with limit grooves (25) corresponding to the limit blocks (24).

4. The movable blade of a large horizontal axis wind turbine according to claim 3, characterized in that: Both sides of the blade (2) are provided with sliding grooves for the auxiliary blades (3) to slide.

5. The movable blade of a large horizontal axis wind turbine according to claim 4, characterized in that: The side of each blade (2) close to the hub (1) is connected to a rotor (4), and the side of each rotor (4) away from the blade (2) passes through the hub (1) and is connected to an adjustment plate (5).

6. The movable blade of a large horizontal axis wind turbine according to claim 5, characterized in that: The pitch control assembly comprises a screw (6) rotatably connected to a wheel hub (1); a threaded sleeve (61) is threadedly connected to the outer side of the screw (6); a plurality of traction rods (62) are rotatably connected to the outer top of the threaded sleeve (61); the number of the traction rods (62) corresponds to the number of the adjustment plates (5); one end of the traction rod (62) away from the threaded sleeve (61) is connected to the edge of one side of the adjustment plate (5); and a second driving member for driving the screw (6) to rotate is installed at the bottom located in the wheel hub (1).

Images