A wind heat de-icing device and method for a wind turbine

Abstract

The application relates to the technical field of wind power generation blades, and particularly discloses a hot air deicing device and method for a wind power generator, which comprises a blade, a hot air blower arranged at one end of the blade, a hot air pipeline connected with the outlet end of the hot air blower, a closing plate arranged at one end of the hot air pipeline, a partition plate connected with the blade, a collecting cavity arranged in the partition plate, an opening arranged at the top of the partition plate, a deflection plate hinged to one end of the opening, a discharge port arranged on one side of the collecting cavity, and a lifting block connected with one side of the collecting cavity. The partition plate arranged in the device can limit the flow of hot air blown by the hot air blower, so that the hot air flows in a specified direction, the hot air can flow along the inner wall of the blade, efficient heating is realized, and the heating and deicing effect is not affected by heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of wind power blade technology, and more specifically, to a wind-heat de-icing device and method for a wind turbine. Background Technology

[0002] Wind turbine blades refer to the blades on a wind turbine generator used to receive the rotation of wind power.

[0003] Because existing wind turbine blades are exposed to the elements for extended periods, a layer of ice condenses on their outer surface when the ambient temperature is low. This increases the weight of the blades, adds to the load, and shifts the center of gravity during rotation, affecting the operation of the wind turbine. Since the blades are located at a high altitude, they are difficult to affect manually, making de-icing work extremely challenging. Summary of the Invention

[0004] The purpose of this invention is to provide a wind-heat de-icing device and method for wind turbines, which solves the problem that a layer of ice will condense on the outer surface of wind turbine blades in low-temperature environments, leading to an increase in blade weight and a change in the center of gravity, and that it is difficult to de-ice the blades because they are located at high altitudes.

[0005] This invention is achieved through the following technical solution:

[0006] This invention provides a wind-heat de-icing device and method for a wind turbine, comprising blades, a hot air blower disposed near one end inside the blades, a hot air duct connected to the outlet end of the hot air blower, a sealing plate disposed at one end of the hot air duct, a partition plate connected inside the blades, a collection cavity formed inside the partition plate, an opening formed at the top of the partition plate, a deflection plate hinged to one end of the opening, an outlet formed on one side of the collection cavity, and a lifting block connected to one side of the collection cavity.

[0007] Preferably, the upper and lower ends of the sealing plate are connected to the partition plate and the bottom of the inner wall of the blade, respectively, and the sealing plate cooperates with the cavity between the bottom of the partition plate and the inner wall of the blade.

[0008] Preferably, the partition plate consists of two plates arranged vertically, and the left and right sides of the partition plate are connected to the inner walls of the blade.

[0009] Preferably, the front and rear ends of the partition plate have gaps with the inner wall of the blade, and the partition plate itself is curved.

[0010] Preferably, the opening further includes a stop block and a fitting groove, the stop block protruding from one side of the middle of the opening, and the fitting groove being formed near one end of the stop block.

[0011] Preferably, the collection cavity further includes a chute, which is formed on one side of the inner wall of the collection cavity, and the outlet is connected to the chute.

[0012] Preferably, the lifting block further includes a slider and a sealing layer, the slider protruding from one side of the lifting block, and the sealing layer being disposed on the outer surface of the slider.

[0013] Preferably, the lifting block is L-shaped, and the horizontal part of the lifting block fits into the fitting groove. The top of the fitting groove is connected to the top of the lifting block by a spring, and the bottom protruding part of the horizontal part of the lifting block is at the opening of the fitting groove.

[0014] Preferably, the slider engages with the groove.

[0015] Preferably, the steps are as follows;

[0016] The first step is to turn on the hot air blower and blow hot air into the hot air duct. Because of the restriction of the sealing plate at one end of the hot air duct, the hot air will only accumulate at the bottom of the partition plate when it is blown out of the hot air duct.

[0017] The second step is that when the hot air accumulates at the bottom of the partition plate, the hot air will continue to blow forward until the front end of the partition plate. Because there is a gap between the front end of the partition plate and the inner wall of the blade cavity, the hot air will flow back through the gap.

[0018] The third step involves separating the space between two partitions, allowing some of the hot air to flow to the top of the upper partition, where it will come into contact with the top of the blade cavity, and finally the heat will flow back to the cavity at the root of the blade.

[0019] In the second step, when the hot air flows back along the partition plate, the steam will seep into the cavity of the blade when the blade is heated and de-iced. The water vapor will adhere to the top of the partition plate and will be blown into the collection cavity through the opening when driven by the hot air, thus preventing the water vapor from condensing into water droplets and flowing back to the hot air blower.

[0020] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0021] 1. The partition plate in the device can limit the flow of hot air blown out by the hot air blower, so that the hot air will flow in a specified direction, allowing the hot air to flow against the inner wall of the blades for efficient heating, without the heat dissipating and affecting the heating and de-icing effect.

[0022] 2. The device is also equipped with a deflection plate and a lifting block. By deflecting the lifting block, pressure can be applied to the lifting block to make it rise and fall while collecting water droplets attached to the partition plate, so as to discharge the collected water droplets and prevent water droplets from accumulating in the blades and being affected by hot air to generate water vapor. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a side view cross-sectional structural diagram of the partition plate of the present invention.

[0025] Figure 3 For the present invention Figure 2 Enlarged diagram of point A in the middle.

[0026] Figure 4 For the present invention Figure 2 A cross-sectional view along the B direction.

[0027] Figure 5 For the present invention Figure 4 Enlarged diagram of point C in the middle.

[0028] Figure 6 This is a schematic diagram of the overall structure of the lifting block of the present invention.

[0029] Reference numerals: 1-blade, 2-hot air blower, 201-hot air duct, 2011-sealing plate, 3-partition plate, 301-opening, 3011-abutting block, 3012-fitting groove, 302-deflecting plate, 303-collecting cavity, 3031-discharge port, 3032-slide groove, 304-lifting block, 3041-slider, 3042-sealing layer. Detailed Implementation

[0030] The following is combined with Figures 1 to 3 The present invention will be described in detail below.

[0031] A wind-heated de-icing device and method for a wind turbine includes a blade 1. A hot air blower 2 is installed inside the blade 1 near one end. A hot air duct 201 is connected to the outlet end of the hot air blower 2. A sealing plate 2011 is installed at one end of the hot air duct 201. A partition plate 3 is connected inside the blade 1. A collection cavity 303 is opened inside the partition plate 3. An opening 301 is opened at the top of the partition plate 3. A deflection plate 302 is hinged to one end of the opening 301. An outlet 3031 is opened on one side of the collection cavity 303. A lifting block 304 is connected to one side of the collection cavity 303.

[0032] Furthermore, the upper and lower ends of the sealing plate 2011 are connected to the bottom of the partition plate 3 and the inner wall of the blade 1, respectively, and the sealing plate 2011 fits into the cavity between the bottom of the partition plate 3 and the inner wall of the blade 1. The partition plate 3 consists of two plates arranged vertically, and the left and right sides of the partition plate 3 are connected to the sides of the inner wall of the blade 1. The front and rear ends of the partition plate 3 have gaps with the inner wall of the blade 1, and the partition plate 3 itself is curved.

[0033] First, hot air is blown in through the hot air blower 2. The hot air is then blown out through the hot air duct 201. Because one end of the hot air duct 201 is connected to the sealing plate 2011, the bottom of the partition plate 3 and the bottom of the blade 1 cavity form a separate cavity. This prevents the hot air from spreading out and instead allows it to accumulate in a limited space before being blown out from the front end of the partition plate 3. The hot air then flows back along the space separated by the partition plate 3, allowing it to reach all parts of the inner wall of the blade 1. This ensures that the inner wall of the blade 1 continues to heat up, allowing the ice on the outer surface of the blade 1 to melt and fall off, preventing it from condensing on the blade and affecting its rotation.

[0034] Furthermore, the opening 301 also includes abutment block 3011 and fitting groove 3012. Abutment block 3011 protrudes from one side of the middle of opening 301, and fitting groove 3012 is formed near one end of abutment block 3011. The collecting cavity 303 also includes a slide groove 3032, which is formed on one side of the inner wall of collecting cavity 303, and outlet 3031 communicates with slide groove 3032. The lifting block 304 also includes slider 3041 and sealing layer 30 42. The slider 3041 protrudes from one side of the lifting block 304. The sealing layer 3042 is disposed on the outer surface of the slider 3041. The lifting block 304 is L-shaped, and the horizontal part of the lifting block 304 cooperates with the fitting groove 3012. The top of the fitting groove 3012 is connected to the top of the lifting block 304 by a spring. The bottom protruding part of the horizontal part of the lifting block 304 is at the opening of the fitting groove 3012. The slider 3041 cooperates with the sliding groove 3032.

[0035] At the same time, when the hot air flows back along the partition plate 3 in the cavity of blade 1, some of the steam generated by the melting of the outer surface of blade 1 will enter the cavity of blade 1 along the gap. Then, driven by the hot air, water droplets adhere to the surface of the partition plate 3 and are blown by the hot air into the collection cavity 303 through the opening 301, thus preventing a large amount of water droplets from flowing back to the hot air blower 2 and causing corrosion of the hot air blower 2.

[0036] The following is a specific implementation process of the present invention. First, when the hot air flows back along the partition plate 3, it carries the water droplets attached to the surface into the collection cavity 303 through the opening 301. Due to gravity, the deflection plate 302 will deflect downward to open the opening 301, allowing the water droplets to enter. When the blade 1 rotates to the other side, the deflection plate 302 will deflect in the opposite direction due to the change in gravity, so as to re-seal the opening 301, so that when the orientation of the partition plate 3 changes, the water droplets in the collection cavity 303 will not flow out of the opening 301 again.

[0037] When the deflection plate 302 deflects to close the opening 301, the deflection plate 302 will abut against the abutment block 3011 on one side of the opening 301. The abutment block 3011 limits the deflection angle of the deflection plate 302 to prevent the deflection angle of the deflection plate 302 from being too large and detaching from the opening 301, thus failing to seal it.

[0038] Simultaneously, when the deflection plate 302 abuts against the abutment block 3011, it will impact and contact the part of the lifting block 304 protruding from the fitting groove 3012. Through the weight and impact during abutment, the lifting block 304 will be forced to retract into the fitting groove 3012, causing the entire lifting block 304 to rise and fall. This causes the slider 3041 on one side of the lifting block 304 to rise along the slide groove 3032, exposing and opening the outlet 3031 connected to the slide groove 3032. Since the outlet 3031 is connected to the outer surface of the blade 1, after the outlet 3031 is opened, the water accumulated in the collection cavity 303 will flow out to the outer surface of the blade 1 through the outlet 3031, preventing it from accumulating in the collection cavity 303 and generating water vapor under the influence of hot air. Then, the lifting block 304 will be reset through the spring connection with the fitting groove 3012.

[0039] Finally, a sealing layer 3042 made of rubber or other materials is provided on the outer surface of the slider 3041. The sealing layer 3042 can fit tightly against the slide groove 3032, so that the lifting block 304 can complete the sealing when blocking the outlet 3031.

Claims

1. A wind-heat de-icing device and method for a wind turbine, comprising blades (1), characterized in that, A hot air blower (2) is provided inside the blade (1) near one end. A hot air duct (201) is connected to the outlet end of the hot air blower (2). A sealing plate (2011) is provided at one end of the hot air duct (201). A partition plate (3) is connected inside the blade (1). A collection cavity (303) is opened inside the partition plate (3). An opening (301) is opened at the top of the partition plate (3). A deflection plate (302) is hinged to one end of the opening (301). An outlet (3031) is opened on one side of the collection cavity (303). A lifting block (304) is connected to one side of the collection cavity (303).

2. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the upper and lower ends of the sealing plate (2011) are respectively connected to the bottom of the partition plate (3) and the inner wall of the blade (1), and the sealing plate (2011) cooperates with the cavity between the bottom of the partition plate (3) and the inner wall of the blade (1).

3. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the partition plate (3) is two plates arranged in an upper and lower manner, and the left and right sides of the partition plate (3) are connected to the inner walls of the blade (1).

4. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the front and rear ends of the partition plate (3) have gaps with the inner wall of the blade (1), and the partition plate (3) itself is curved.

5. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the opening (301) further includes a stop block (3011) and a fitting groove (3012), the stop block (3011) protruding from one side of the middle part of the opening (301), and the fitting groove (3012) being formed near one end of the stop block (3011).

6. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the collecting cavity (303) further includes a chute (3032), the chute (3032) is opened on one side of the inner wall of the collecting cavity (303), and the outlet (3031) is connected to the chute (3032).

7. The wind-heat de-icing device and method for a wind turbine according to claim 1, characterized in that the lifting block (304) further includes a slider (3041) and a sealing layer (3042), the slider (3041) protruding from one side of the lifting block (304), and the sealing layer (3042) being disposed on the outer surface of the slider (3041).

8. The wind-heat de-icing device and method for a wind turbine generator according to claim 5, characterized in that the lifting block (304) is L-shaped, and the lateral portion of the lifting block (304) is fitted with the fitting groove (3012), the top of the fitting groove (3012) is connected to the top of the lifting block (304) by a spring, and the bottom protruding portion of the lateral portion of the lifting block (304) is at the opening of the fitting groove (3012).

9. The wind-heat de-icing device and method for a wind turbine generator according to claim 7, characterized in that the slider (3041) cooperates with the slide groove (3032).

10. A method of using the wind-heat de-icing device for a wind turbine generator according to any one of claims 1-9, comprising the following steps; The first step is to turn on the hot air blower (2) and blow hot air into the hot air duct (201). Because of the restriction of the sealing plate (2011) at one end of the hot air duct (201), the hot air blown out of the hot air duct (201) will only accumulate at the bottom of the partition plate (3). The second step is that when the hot air accumulates at the bottom of the partition plate (3), the hot air will continue to blow forward until the front end of the partition plate (3) because there is a gap between the front end of the partition plate (3) and the inner wall of the blade (1), allowing the hot air to flow back through the gap. The third step is to separate the space of the two partition plates (3) so that some hot air will flow into the top of the upper partition plate (3) and the hot air will come into contact with the top of the inside of the blade cavity. Finally, the heat will flow back to the cavity at the root of the blade (1). In the second step, when the hot air flows back along the partition plate (3), when the blade (1) is heated and de-iced, the steam will seep into the cavity of the blade (1), and the water vapor will adhere to the top of the partition plate (3). When driven by the hot air, it will be blown into the collection cavity (303) through the opening (301), thus preventing the water vapor from condensing into water droplets and flowing back to the hot air blower (2).

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