Electric heating deicing device for wind power blade group

Abstract

The invention discloses an electric heating deicing device for a wind power blade group, which relates to the technical field of deicing of wind power blades, and comprises an electric box, a wind power generator, an electric heating device and an electric heating device, the cold wind collecting and converting mechanism is mounted on the wind driven generator and comprises an air inlet cover and a heating wire; the melting and assisting mechanism is mounted on the cold wind collecting and converting mechanism and comprises two groups of nozzles which are arranged in a mirror image manner; the cold wind collecting and converting mechanism and the melting and assisting mechanism are installed to collect external wind and convert the wind into hot wind to be transmitted to the surfaces of the blades, the surfaces of the blades are evenly heated, the situation that dynamic balance of the blades is affected by incomplete ice melting is avoided, the hot wind generates thrust on the blades while melting ice on the surfaces of the blades, the rotating speed of the blades is guaranteed, and the service life of the blades is prolonged. The influence of deicing on the blades is reduced, and the power generation efficiency of the fan is guaranteed while deicing is conducted; and molten water and ice slag are separated from the blade by installing the molten water treatment mechanism, and are prevented from being frozen on the surface of the blade again.

Description

Technical Field

[0001] The present invention relates to the technical field of de - icing for wind turbine blades, and particularly to an electro - thermal de - icing device for a wind turbine blade group. Background Art

[0002] The electro - thermal de - icing of small wind turbine blade groups is a technology that converts electrical energy into heat energy to prevent or remove ice on the surface of the fan blades. It is mainly applied to wind turbines in cold regions to prevent problems such as a decrease in the aerodynamic performance of the blades, an increase in the vibration of the unit, or shutdown caused by icing.

[0003] In the prior art, the fan blades are heated from the inside out by heating wires to achieve de - icing on the surface of the fan blades. However, because the fan blades themselves have a certain thickness, the power consumption is relatively high during the heat conduction process. Moreover, due to the distribution of the heating wires, the surface of the blades is prone to uneven heating, resulting in incomplete ice melting and affecting the dynamic balance of the blades. Summary of the Invention

[0004] The present invention proposes an electro - thermal de - icing device for a wind turbine blade group to solve the above - mentioned deficiencies in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An electro - thermal de - icing device for a wind turbine blade group includes an electrical box, and further includes: A wind turbine, which is installed on the top of the electrical box; A cold - wind collection and conversion mechanism, which is installed on the wind turbine and includes an air inlet hood and heating wires; A melting and assisting mechanism, which is installed on the cold - wind collection and conversion mechanism and includes two groups of nozzles arranged in a mirror image; A melt - water treatment mechanism, which is connected to the melting and assisting mechanism.

[0006] Further, the wind turbine includes a support rod fixed on the top of the electrical box. The top of the support rod is rotatably connected to the fuselage. The fuselage is electrically connected to the electrical box. An installation shaft is installed at the input end of the fuselage. A plurality of connecting plates are fixed on the outer wall of the installation shaft. Blades are fixed on the side of the connecting plate away from the installation shaft.

[0007] Further, the cold - wind collection and conversion mechanism further includes a fixing ring fixed on the outer wall of the fuselage. A joint one is fixed inside the fixing ring; One side of the fixing ring is fixed with a sleeve, and the sleeve is sleeved on the outside of the fuselage; One end of the heating wire is fixedly connected to the fixing ring, and the heating wire is electrically connected to the electrical box; The heating wire is sleeved between the sleeve and the fuselage; The inner wall of the air inlet hood is provided with a slope; The wind passing through the blade enters the inside of the sleeve along the slope in the air inlet hood, passes through the heating wire to be converted into hot air, and then enters the inside of the first joint.

[0008] Furthermore, the melting and assisting mechanism includes a mounting plate fixed to the outer wall of the bottom of the air inlet hood, and a U-shaped mounting frame is fixed to one side of the mounting plate; Two groups of the nozzles are respectively installed on the side walls of the U-shaped mounting frame; A housing is fixed to one side of the U-shaped mounting frame, and a plurality of drag reduction slopes are provided on the side of the housing facing the wind direction. One group of the nozzles is sleeved inside the housing.

[0009] Furthermore, each group of the nozzles includes a plurality of second joints, and the second joints are communicated with the first joint through a heat-insulating pipe; One end of the second joint is obliquely communicated with a flat air outlet nozzle, and the inclination direction of the flat air outlet nozzle faces the central plane of the U-shaped mounting frame.

[0010] Furthermore, the ice melting treatment mechanism includes two fixing plates fixed to the top of the U-shaped mounting frame, and the gap between the two fixing plates is greater than the width of the connecting plate; Elastic materials are fixed to the side of the fixing plate facing the inner wall of the bottom of the U-shaped mounting frame, and the bottom ends of the elastic materials are fixedly connected with the inner wall of the bottom of the U-shaped mounting frame; The distance between the two elastic materials is less than the thickness of the blade.

[0011] Furthermore, the ice melting treatment mechanism further includes a water outlet opened at the bottom of the U-shaped mounting frame.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By installing the cold wind collection and conversion mechanism and the melting and assisting mechanism, the present invention collects and converts the external wind into hot air and transmits it to the surface of the blade, uniformly heating the surface of the blade, avoiding incomplete ice melting from affecting the dynamic balance of the blade, and at the same time, the hot air generates a thrust on the blade while melting the ice on the blade surface, ensuring the rotation speed of the blade, reducing the impact on the blade during de-icing, and ensuring the power generation efficiency of the wind turbine while de-icing.

[0013] 2. By installing the ice melting treatment mechanism, the present invention separates the melted water and ice slag from the blade, avoiding refreezing on the blade surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an electrothermal de-icing device for a wind power blade group proposed by the present invention.

[0015] Figure 2 It is a schematic structural diagram of a wind turbine of an electrothermal de-icing device for a wind power blade group proposed by the present invention.

[0016] Figure 3 This is a schematic diagram of the first perspective of the cold wind collection and conversion mechanism of an electric heating de-icing device for a wind power blade group proposed by the present invention.

[0017] Figure 4 This is a schematic diagram of the second perspective of the cold wind collection and conversion mechanism of an electric heating de-icing device for a wind power blade group proposed by the present invention.

[0018] Figure 5 This is a schematic diagram of the first perspective of the explosion of the melting and boosting mechanism of an electric heating de-icing device for a wind power blade group proposed by the present invention.

[0019] Figure 6 This is a schematic diagram of the second perspective of the explosion of the melting and boosting mechanism of an electric heating de-icing device for a wind power blade group proposed by the present invention.

[0020] Figure 7 This is a schematic diagram of the nozzle structure of an electric heating de-icing device for a wind power blade group proposed by the present invention.

[0021] In the figure: 1. Electric box; 2. Wind turbine; 21. Support rod; 22. Body; 23. Mounting shaft; 24. Connecting plate; 25. Blade; 3. Cold wind collection and conversion mechanism; 31. Fixed ring; 32. Connector 1; 33. Sleeve; 34. Heating wire; 35. Air inlet hood; 4. Melting and boosting mechanism; 41. U-shaped mounting frame; 42. Connector 2; 43. Outlet flat nozzle; 44. Sheath; 45. Drag reduction slope; 46. Mounting plate; 5. Melting water treatment mechanism; 51. Fixed plate; 52. Elastic material; 53. Water outlet. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment: Refer to Figures 1-7 : An electrothermal deicing device for a wind power blade group, comprising an electric box 1, further comprising: A wind turbine 2, which is installed on the top of the electric box 1; A cold wind collection and conversion mechanism 3, which is installed on the wind turbine 2 and comprises an air inlet hood 35 and a heating wire 34; A melting and boosting mechanism 4, which is installed on the cold wind collection and conversion mechanism 3 and comprises two groups of nozzles arranged in a mirror image; A melting water treatment mechanism 5, which is connected to the melting and boosting mechanism 4.

[0026] The wind turbine 2 comprises a support rod 21 fixed on the top of the electric box 1. The top of the support rod 21 is rotatably connected to a fuselage 22. The fuselage 22 is electrically connected to the electric box 1. An installation shaft 23 is installed at the input end of the fuselage 22. A plurality of connecting plates 24 are fixed on the outer wall of the installation shaft 23. One side of the connecting plate 24 away from the installation shaft 23 is fixed with a blade 25; The cold wind blows the blade 25 to drive the installation shaft 23 to rotate. The rotation of the installation shaft 23 causes the fuselage 22 to generate electricity and transmits the electricity to the electric box 1.

[0027] The cold wind collection and conversion mechanism 3 further comprises a fixing ring 31 fixed on the outer wall of the fuselage 22. A connector one 32 is fixed inside the fixing ring 31; One side of the fixing ring 31 is fixed with a sleeve 33. The sleeve 33 is sleeved on the outside of the fuselage 22; One end of the heating wire 34 is fixedly connected to the fixing ring 31. The heating wire 34 is electrically connected to the electric box 1; The heating wire 34 is sleeved between the sleeve 33 and the fuselage 22; The inner wall of the air inlet hood 35 is provided with a slope; The wind passing through the blade 25 enters the inside of the sleeve 33 along the slope inside the air inlet hood 35, passes through the heating wire 34, is converted into hot air, and then enters the inside of the connector one 32; Start the heating wire 34 through the electrical box 1. The cold wind blows multiple blades 25 to rotate. Part of the wind passing through the blades 25 will enter the interior of the air inlet hood 35 and then enter the interior of the sleeve 33. When the cold wind passes through the heating wire 34, it is heated. The heated gas enters the interior of the first connector 32 and then enters the interior of the second connector 42 along the heat-insulating pipe. Then, the hot air is sprayed into the interior of the U-shaped mounting bracket 41 through the flat air outlet nozzle 43.

[0028] The melting and assisting mechanism 4 includes a mounting plate 46 fixed to the outer wall of the bottom of the air inlet hood 35. One side of the mounting plate 46 is fixed with a U-shaped mounting bracket 41; Two groups of nozzles are respectively installed on the side walls of the U-shaped mounting bracket 41; One side of the U-shaped mounting bracket 41 is fixed with a housing 44. The side of the housing 44 facing the wind direction is provided with a plurality of drag reduction slopes 45. One group of nozzles is sleeved inside the housing 44; The drag reduction slopes 45 reduce the wind resistance.

[0029] Each group of nozzles includes a plurality of second connectors 42. The second connectors 42 are communicated with the first connector 32 through a heat-insulating pipe; One end of the second connector 42 is obliquely communicated with a flat air outlet nozzle 43. The inclined direction of the flat air outlet nozzle 43 faces the central plane of the U-shaped mounting bracket 41; The blades 25 enter between the two groups of nozzles from the opening of the U-shaped mounting bracket 41 facing obliquely upward. Because the inclined direction of the flat air outlet nozzle 43 of the nozzle is the same as the rotation direction of the blades 25, when the blades 25 enter between the two flat air outlet nozzles 43, the wind blown by the flat air outlet nozzle 43 onto the blades 25 generates a thrust on the blades 25, accelerating the rotation of the blades 25. Thus, it reduces the influence that the blades 25 inside cannot be directly contacted by the external wind and decelerate when the U-shaped mounting bracket 41 de-ices the blades 25. The acceleration of the blades 25 increases the rotation speed of the mounting shaft 23, improves the power generation efficiency, and makes up for the power consumption of the heating wire 34 during operation.

[0030] The melting water treatment mechanism 5 includes two fixing plates 51 fixed to the top of the U-shaped mounting bracket 41. The gap between the two fixing plates 51 is larger than the width of the connecting plate 24. When the connecting plate 24 passes through between the two fixing plates 51, it will not be affected; One side of the fixing plate 51 facing the inner wall of the bottom of the U-shaped mounting bracket 41 is fixed with an elastic material 52. The bottom end of the elastic material 52 is fixedly connected to the inner wall of the bottom of the U-shaped mounting bracket 41; The distance between the two elastic materials 52 is smaller than the thickness of the blades 25. When the blades 25 are inserted into the interior of the two elastic materials 52, the elastic materials 52 are deformed to closely adhere to the surface of the blades 25, scraping off the water and ice scum on the surface of the blades 25.

[0031] The melting water treatment mechanism 5 further includes a water outlet 53 opened at the bottom of the U-shaped mounting bracket 41; The hot air ejected through the flat air outlet 43 contacts the surface of the blade 25, melting the ice on the surface of the blade 25, reducing the firmness between the ice and the blade 25, and making it easier for the ice to break away from the blade 25. Then, when the blade 25 is about to rotate out from the other side of the U-shaped mounting bracket 41, the edge of the blade 25 inserts between two elastic materials 52 (elastic rubber bands). The elastic material 52 is of a cylindrical structure, and the cylindrical structure can reduce the frictional force between the elastic material 52 and the blade 25. Therefore, when the blade 25 continues to rotate and insert, as the thickness of the blade 25 increases, it will support the elastic material 52. The elastic material 52 clings to the surface of the blade 25 and scrapes off the water and ice debris on its surface. After the water and ice debris are scraped off, they are discharged through the water outlet 53.

[0032] Working principle: Start the heating wire 34 through the electric box 1. The cold wind blows multiple blades 25 to rotate. A part of the wind passing through the blades 25 will enter the inside of the air inlet cover 35, and then enter the inside of the sleeve 33. When the cold wind passes through the heating wire 34, it is heated. The heated gas enters the inside of the connector 1 32, then enters the inside of the connector 2 42 along the heat preservation pipe, and then the hot air is sprayed into the inside of the U-shaped mounting bracket 41 through the flat air outlet 43; The cold wind blows the blade 25 to drive the mounting shaft 23 to rotate. The rotation of the mounting shaft 23 causes the fuselage 22 to generate electricity and transmits the electricity to the electric box 1; The blade 25 enters between the two groups of nozzles from the opening of the U-shaped mounting bracket 41 facing obliquely upward. Since the inclination direction of the flat air outlet 43 of the nozzle is the same as the rotation direction of the blade 25, when the blade 25 enters between the two flat air outlets 43, the wind blown by the flat air outlet 43 onto the blade 25 generates a thrust on the blade 25, accelerating the rotation of the blade 25, thereby reducing the influence that the blade 25 located inside cannot be directly contacted by the external wind and decelerates when the U-shaped mounting bracket 41 de-ices the blade 25. The acceleration of the blade 25 increases the rotation speed of the mounting shaft 23, improves the power generation efficiency, and makes up for the power consumption of the heating wire 34 during operation; The hot air ejected through the flat air outlet 43 contacts the surface of the blade 25, melting the ice on the surface of the blade 25, reducing the firmness between the ice and the blade 25, and making it easier for the ice to break away from the blade 25. Then, when the blade 25 is about to rotate out from the other side of the U-shaped mounting bracket 41, the edge of the blade 25 inserts between two elastic materials 52 (elastic rubber bands). The elastic material 52 is of a cylindrical structure, and the cylindrical structure can reduce the frictional force between the elastic material 52 and the blade 25. Therefore, when the blade 25 continues to rotate and insert, as the thickness of the blade 25 increases, it will support the elastic material 52. The elastic material 52 clings to the surface of the blade 25 and scrapes off the water and ice debris on its surface. After the water and ice debris are scraped off, they are discharged through the water outlet 53.

[0033] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention by making equivalent substitutions or changes according to the technical solution and inventive concept of the present invention.

Claims

1. An electric heating deicing device for a wind turbine blade assembly, comprising an electric box (1), characterized in that: Also includes: A wind turbine (2) mounted on the top of the electrical box (1); A cold wind collection and conversion mechanism (3), which is installed on the wind turbine (2), and comprises an air inlet cover (35) and a heating wire (34); A melting and assisting mechanism (4), which is mounted on the cold wind collecting and transforming mechanism (3), and comprises two sets of nozzles arranged in a mirror image; The melt water treatment mechanism (5) is connected to the melting and assisting mechanism (4).

2. The wind turbine blade group electric heating deicing device according to claim 1, characterized in that: The wind turbine (2) comprises a support rod (21) fixed to the top of an electrical box (1); the top of the support rod (21) is rotatably connected to a fuselage (22); the fuselage (22) is electrically connected to the electrical box (1); an installation shaft (23) is installed at the input end of the fuselage (22); a plurality of connecting plates (24) are fixed to the outer wall of the installing shaft (23); and blades (25) are fixed to the side of the connecting plate (24) away from the installing shaft (23).

3. The wind turbine blade group electric heating deicing device according to claim 2 is characterized in that: The cold wind collection and conversion mechanism (3) further comprises a fixing ring (31) fixed to the outer wall of the fuselage (22), and a joint 1 (32) is fixed inside the fixing ring (31); A sleeve (33) is fixed to one side of the fixing ring (31), and the sleeve (33) is sleeved on the outside of the fuselage (22); One end of the heating wire (34) is fixedly connected to the fixing ring (31), and the heating wire (34) is electrically connected to the electrical box (1); The heating wire (34) is sleeved between the sleeve (33) and the body (22); The inner wall of the air inlet cover (35) is provided with a slope; The wind passing through the blades (25) enters the interior of the sleeve (33) along the slope in the air inlet cover (35), passes through the heating wire (34), is converted into hot air, and then enters the interior of the first joint (32).

4. The wind turbine blade group electric heating deicing device according to claim 3 is characterized in that: The melting and assisting mechanism (4) comprises a mounting plate (46) fixed to the bottom outer wall of the air inlet cover (35), and a U-shaped mounting frame (41) is fixed to one side of the mounting plate (46); The two groups of nozzles are respectively mounted on the side walls of the U-shaped mounting frame (41); A casing (44) is fixed to one side of the U-shaped mounting frame (41), and a plurality of drag-reducing slopes (45) are provided on a side of the casing (44) facing the wind direction, wherein a group of the nozzles is sleeved inside the casing (44).

5. The wind turbine blade group electric heating deicing device according to claim 4, characterized in that: Each group of the nozzles comprises a plurality of second joints (42), wherein the second joints (42) are connected to the first joint (32) via a heat preservation pipe; One end of the second joint (42) is connected obliquely to a flat outlet nozzle (43), and the oblique direction of the flat outlet nozzle (43) faces the central plane of the U-shaped mounting frame (41).

6. The wind turbine blade group electric heating deicing device according to claim 5, characterized in that: The melt water treatment mechanism (5) comprises two fixing plates (51) fixed on the top of the U-shaped mounting frame (41), and the gap between the two fixing plates (51) is greater than the width of the connecting plate (24); An elastic material (52) is fixed to one side of the fixing plate (51) facing the bottom inner wall of the U-shaped mounting frame (41), and the bottom end of the elastic material (52) is fixedly connected to the bottom inner wall of the U-shaped mounting frame (41); The distance between the two elastic materials (52) is smaller than the thickness of the blade (25).

7. The wind turbine blade group electric heating deicing device according to claim 6, characterized in that: The melt water processing mechanism (5) further comprises a water outlet (53) provided at the bottom of the U-shaped mounting frame (41).

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