A wind turbine blade device with deicing capability

Abstract

The present invention discloses a wind power blade device with deicing capability, comprising a wind power blade and a leading edge air regulating mechanism, wherein the leading edge air regulating mechanism is installed in the wind power blade, and the wind power blade comprises a blade shell, wherein a trailing edge web is installed on the top of the inner wall of the blade shell, a leading edge web is installed on the inner wall of the blade shell and below the trailing edge web, and a trailing edge wind shield is installed on the right side of the trailing edge web. The present invention realizes a wind power blade device with deicing capability through the mutual cooperation of the trailing edge web, the leading edge web, the trailing edge wind shield, the leading edge blade tip web, the blade tip vent, the ventilation pipe, the leading edge wind shield, the heating and ventilation device, the vent regulating plate, the regulating vent and the fixing bolt, thereby solving the problem that the heating element cannot be directly arranged in the tip area of ​​the wind power blade for heating and deicing, and solving the problem that the wind pressure of the circulation system is too high and the flow rate is too large when the traditional gas-heat circulation structure is adopted for large-sized and large pre-bent blades.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade deicing prevention and deicing, and in particular to a wind turbine blade device with deicing capability. Background Art

[0002] Wind turbines are usually installed in areas with high altitudes, low temperatures, high humidity, and frequent thunderstorms. Especially in winter, as the temperature drops and the humidity increases, the outer surface of wind turbine blades is very easy to freeze. Ice on the blade surface often causes turbine vibration or power factor distortion and endangers the operation of the unit. Therefore, the unit must be shut down after freezing, causing a large amount of power generation losses to the wind farm.

[0003] The deicing of existing wind turbine blades is mainly achieved by adding heating elements inside or outside the blades to heat the blades. Generally, there are technical routes such as gas heating and electric heating. In addition, the conventional gas heating deicing system structure is difficult to apply to large-sized and large pre-bent blades, and has a small scope of application, which is not conducive to wide promotion and popularization. For this reason, we provide a wind turbine blade device with deicing capability. Summary of the invention

[0004] The object of the present invention is to provide a wind turbine blade device with deicing capability to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a wind power generation blade device with deicing capability, comprising a wind power generation blade and a leading edge air regulating mechanism, wherein the leading edge air regulating mechanism is installed in the wind power generation blade;

[0006] The wind turbine blade comprises a blade shell, a trailing edge web is installed on the top of the inner wall of the blade shell, a leading edge web is installed on the inner wall of the blade shell and below the trailing edge web, a trailing edge wind shield is installed on the right side of the trailing edge web, a leading edge blade tip web is arranged at the right end of the leading edge web, a side of the leading edge blade tip web close to the blade shell is fixedly installed with the blade shell, a blade tip ventilation hole is formed between the leading edge web and the leading edge blade tip web, a ventilation pipe is installed on the inner wall of the blade shell and below the leading edge web, a leading edge wind shield is installed on the bottom of the inner wall of the blade shell and on the front side of the ventilation pipe, and a heating and ventilation device is installed on the left side of the inner wall of the blade shell and at a position corresponding to the ventilation pipe;

[0007] The leading edge adjustment mechanism includes an air hole adjustment pressure plate, the side of the air hole adjustment pressure plate close to the leading edge wind shield plate is in contact with the leading edge wind shield plate, the left side of the adjustment pressure plate and the left side of the leading edge wind shield plate are both provided with matching adjustment air holes, a fixing bolt is provided on the left side of the air hole adjustment pressure plate, the rear end of the fixing bolt passes through the air hole adjustment pressure plate and the leading edge wind shield plate from left to right in sequence and extends to the interior of the leading edge wind shield plate and is threadedly connected thereto.

[0008] Furthermore, the side of the trailing edge wind deflector close to the blade shell is fixedly mounted to the blade shell.

[0009] Furthermore, a side of the leading edge wind deflector close to the leading edge web is fixedly mounted to the leading edge web.

[0010] Furthermore, the heating and ventilation device is fixedly mounted on a side of the ventilation pipe close to the ventilation pipe.

[0011] Furthermore, a blade web cavity is formed between the trailing edge web and the leading edge web.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention realizes a wind turbine blade device with deicing capability through the cooperation of the trailing edge web, the leading edge web, the trailing edge wind shield, the leading edge blade tip web, the blade tip vent, the ventilation pipe, the leading edge wind shield, the heating and ventilation device, the wind hole adjustment pressure plate, the adjustment wind hole and the fixing bolts, thereby solving the problem that the tip area of ​​the wind turbine blade cannot be directly arranged with a heating element for heating and deicing, and the blade body structure is slightly modified or almost unchanged, which does not affect the structural strength of the blade and does not require the blade structure to be redesigned, and solves the problem that the wind pressure of the circulation system is too high when a large-sized and large pre-bent blade adopts a traditional gas-heat circulation structure. The problems of high and excessive flow rate are solved, which reduces the system design risk and the performance requirements for the heating device. The system has low cost, simple structure, reliable operation and long service life. The maintainable wind hole adjustment device can solve the differentiated needs of the heating power of the heating system under different operating environment temperatures, different climatic conditions and different wind speeds, and realizes the dual advantages of rapid heating and low power consumption operation. It has a wide range of applicability and can be applied to small size and small pre-bent blades. It is also suitable for large leaf type and large pre-bent blades. It has good versatility and adaptability, simple structure and low cost, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural cross-sectional view of the front view of the present invention;

[0015] Figure 2 It is a structural cross-sectional view of a left side view of the first embodiment of the present invention;

[0016] Figure 3It is a structural cross-sectional view of the left side view of the second embodiment of the present invention;

[0017] Figure 4 It is a structural cross-sectional view of the left side view of the third embodiment of the present invention;

[0018] Figure 5 It is a structural cross-sectional view of the left view of embodiment 4 of the present invention.

[0019] In the figure: 1 wind turbine blade, 11 blade shell, 12 trailing edge web, 13 leading edge web, 14 trailing edge wind shield, 15 leading edge blade tip web, 16 blade tip ventilation hole, 17 ventilation pipe, 18 leading edge wind shield, 19 heating and ventilation device, 2 leading edge air adjustment mechanism, 21 air hole adjustment pressure plate, 22 adjusting air hole, 23 fixing bolt, 3 web cavity, 213 adjusting bolt, 214 cylinder, 215 buffer spring, 216 support plate, 217 wind speed sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1

[0022] See also Figure 1 A wind turbine blade device with deicing capability comprises a wind turbine blade 1 and a leading edge air regulating mechanism 2, wherein the leading edge air regulating mechanism 2 is installed in the wind turbine blade 1.

[0023] See also Figure 1The wind turbine blade 1 comprises a blade shell 11, a trailing edge web 12 is installed on the top of the inner wall of the blade shell 11, a leading edge web 13 is installed on the inner wall of the blade shell 11 and below the trailing edge web 12, a blade web cavity 3 is formed between the trailing edge web 12 and the leading edge web 13, a trailing edge wind shield 14 is installed on the right side of the trailing edge web 12, the trailing edge wind shield 14 is fixedly installed with the blade shell 11 on the side close to the blade shell 11, the trailing edge wind shield 14 mainly functions to seal the blade trailing edge cavity so that the hot air flow returns to the blade root through the web cavity 3, a leading edge blade tip web 15 is arranged on the right end of the leading edge web 13, the leading edge blade tip web 15 is fixedly installed with the blade shell 11 on the side close to the blade shell 11, the leading edge blade tip web 15 is formed after the leading edge web 13 is cut off, and the leading edge web 1 3 and the leading edge blade tip web 15 form a blade tip ventilation hole 16, the blade tip ventilation hole 16 mainly functions to guide the hot air flow at the leading edge into the web inner cavity 3, a ventilation pipe 17 is installed on the inner wall of the blade shell 11 and below the leading edge web 13, the ventilation pipe 17 mainly functions to guide the hot air flow into the leading edge inner cavity on the blade tip side, a leading edge windshield 18 is installed at the bottom of the inner wall of the blade shell 11 and on the front of the ventilation pipe 17, the leading edge windshield 18 is fixedly installed with the leading edge web 13 on the side close to the leading edge web 13, the leading edge windshield 18 is used to seal the blade tip side cavity, a heating and ventilation device 19 is installed on the left side of the inner wall of the blade shell 11 and at the position corresponding to the ventilation pipe 17, the heating and ventilation device 19 provides hot air flow, and the heating and ventilation device 19 is fixedly installed with the ventilation pipe 17 on the side close to the ventilation pipe 17.

[0024] See also Figure 1-2The leading edge adjustment mechanism 2 includes an air hole adjustment pressure plate 21. The side of the air hole adjustment pressure plate 21 close to the leading edge wind shield 18 contacts the leading edge wind shield 18. The left side of the adjustment pressure plate 21 and the left side of the leading edge wind shield 18 are both provided with matching adjustment air holes 22. The adjustment air holes 22 can be designed in various shapes such as circular, square, elliptical and other geometric shapes, but circular shapes are particularly preferred. The circular structure can reduce vibration and noise. A fixing bolt 23 is provided on the left side of the air hole adjustment pressure plate 21. The rear end of the fixing bolt 23 passes through the air hole adjustment pressure plate 21 and the leading edge wind shield 18 from left to right in turn and extends to the inside of the leading edge wind shield 18 and is threadedly connected thereto. The device has a variety of adjustment and control schemes, which can be applied to different application occasions such as fixed air adjustment and running air adjustment. It has wide applicability and flexible adjustment. It can increase the deicing area of ​​the leading edge of the blade while effectively reducing the hot air flow circulation pressure in the blade cavity. Through the cooperation of the trailing edge web 12, the leading edge web 13, the trailing edge wind shield 14, the leading edge blade tip web 15, the blade tip ventilation hole 16, the ventilation pipe 17, the leading edge wind shield 18, the heating and ventilation device 19, the air hole adjustment pressure plate 21, the adjustment air hole 22 and the fixing bolt 23, a wind power generation blade device with deicing ability is realized, which solves the problem that the heating element cannot be directly arranged in the tip area of ​​the wind power blade for heating and deicing, and the blade itself The body structure is slightly changed or almost unchanged, which does not affect the structural strength of the blades and does not require redesign of the blade structure. It solves the problem of excessive wind pressure and excessive flow rate in the circulation system when large-sized and large pre-bent blades adopt traditional gas-heat circulation structure, reduces the system design risk and the performance requirements for the heating device. The system has low cost, simple structure, reliable operation and long service life. The maintainable air hole adjustment device can solve the differentiated requirements for the heating power of the heating system under different operating environment temperatures, different climatic conditions and different wind speeds, and achieves the dual advantages of rapid heating and low power consumption operation. It has a wide range of applicability and can be applied to small-sized and small pre-bent blades, as well as suitable for The large-leaf and large pre-bent blades have good versatility and adaptability, and have a simple structure, low cost, and broad application prospects. When in use, the heating and ventilation device 19 is connected to the de-icing control system via a cable. After the de-icing control system controls the heating and ventilation device 19 to operate, the heating and ventilation device 19 can provide a hot air flow with a certain pressure from the ventilation pipe 17 to pass into the leading edge cavity of the blade tip behind the leading edge wind shield 18. The hot air flow can heat the leading edge of the blade through the leading edge cavity of the blade and enter the web cavity 3 through the tip vent 16, and return to the root of the blade through the web cavity 3 and be heated and pressurized by the heating and ventilation device 19 before being sent to the ventilation pipe 17 again, thereby forming a circulation heating.

[0025] Embodiment 2

[0026] See also Figure 3The leading edge adjustment mechanism 2 includes an air hole adjustment pressure plate 21, and a fixed ventilation hole 212 matching with it is opened on the left side of the leading edge wind shield 18 and at the position corresponding to the air hole adjustment pressure plate 21. An adjusting bolt 213 is arranged on the left side of the air hole adjustment pressure plate 21. The rear end of the adjusting bolt 213 passes through the air hole adjustment pressure plate 21 and the leading edge wind shield 18 from left to right in sequence and extends to the interior of the leading edge wind shield 18 and is threadedly connected thereto. By installing different adjusting bolts 213, the ventilation area of ​​the fixed ventilation hole 212 on the leading edge wind shield 18 can be adjusted, thereby realizing flow and pressure regulation.

[0027] Embodiment 3

[0028] See also Figure 4 The leading edge regulating mechanism 2 comprises an air hole regulating plate 21, and a fixed ventilation hole 212 which matches the leading edge wind shield 18 is provided on the left side of the air hole regulating plate 21 and corresponds to the position of the air hole regulating plate 21. A cylinder 214 is installed on the top of the air hole regulating plate 21. The cylinder 214 is fixedly installed with the leading edge wind shield 18 on one side close to the leading edge wind shield 18. The cylinder 214 can drive the air hole regulating plate 21 to move up and down, so that the air hole regulating plate 21 can adjust the area of ​​the fixed ventilation hole 212. By adding a cylinder 214, the air regulating device can realize automatic air regulation.

[0029] Embodiment 4

[0030] See also Figure 5 The leading edge regulating mechanism 2 comprises an air hole regulating pressure plate 21, and the air hole regulating pressure plate 21, a fixed ventilation hole 212 adapted thereto is provided on the left side of the leading edge wind shield 18 and at a position corresponding to the air hole regulating pressure plate 21, a buffer spring 215 is installed on the top of the air hole regulating pressure plate 21, a support plate 216 is installed on the side of the buffer spring 215 away from the air hole regulating pressure plate 21, and a side of the support plate 216 close to the leading edge wind shield 18 is fixedly installed with the leading edge wind shield 18, a wind speed sensor 217 is installed on the left side of the leading edge wind shield 18 and at a position corresponding to the air hole regulating pressure plate 21, the wind speed sensor 217 transmits the wind speed and wind direction to the control room, and then controls the rotation direction of the blade through the controller, so that the buffer spring 215 can be blown by the wind speed, so that the air hole regulating pressure plate 21 can squeeze the buffer spring 215, and add a buffer spring 215 and a wind speed sensor 217, then the air regulating device can become an air regulating mechanism that automatically adjusts according to the wind pressure and wind speed.

[0031] In summary: the wind turbine blade device with de-icing capability solves the problems raised in the above-mentioned background technology by arranging the trailing edge web 12, the leading edge web 13, the trailing edge wind shield 14, the leading edge blade tip web 15, the blade tip ventilation hole 16, the ventilation pipe 17, the leading edge wind shield 18, the heating and ventilation device 19, the wind hole adjustment pressure plate 21, the adjustment wind hole 22 and the fixing bolts 23, which cooperate with each other.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade device with deicing capability, comprising a wind turbine blade (1) and a leading edge air adjustment mechanism (2), characterized in that: The leading edge air adjustment mechanism (2) is installed in the wind power generation blade (1); The wind power generation blade (1) comprises a blade shell (11), a trailing edge web (12) is installed on the top of the inner wall of the blade shell (11), a leading edge web (13) is installed on the inner wall of the blade shell (11) and below the trailing edge web (12), a trailing edge windshield (14) is installed on the right side of the trailing edge web (12), a leading edge blade tip web (15) is arranged at the right end of the leading edge web (13), and a side of the leading edge blade tip web (15) close to the blade shell (11) is in contact with the blade The blade shell (11) is fixedly installed, a blade tip ventilation hole (16) is formed between the leading edge web (13) and the leading edge blade tip web (15), a ventilation pipe (17) is installed on the inner wall of the blade shell (11) and below the leading edge web (13), a leading edge windshield (18) is installed at the bottom of the inner wall of the blade shell (11) and in front of the ventilation pipe (17), and a heating and ventilation device (19) is installed on the left side of the inner wall of the blade shell (11) and at a position corresponding to the ventilation pipe (17); The leading edge air adjustment mechanism (2) comprises an air hole adjustment pressure plate (21), a side of the air hole adjustment pressure plate (21) close to the leading edge wind shield (18) contacts the leading edge wind shield (18), the left side of the adjustment pressure plate (21) and the left side of the leading edge wind shield (18) are both provided with matching adjustment air holes (22), a fixing bolt (23) is provided on the left side of the air hole adjustment pressure plate (21), the rear end of the fixing bolt (23) passes through the air hole adjustment pressure plate (21) and the leading edge wind shield (18) from left to right in sequence and extends to the inside of the leading edge wind shield (18) and is threadedly connected thereto; a blade web cavity (3) is formed between the trailing edge web (12) and the leading edge web (13); A cylinder (214) and a buffer spring (215) are installed on the top of the wind hole regulating pressure plate (21), and a wind speed sensor (217) is installed on the left side of the leading edge wind shield (18) and at a position corresponding to the wind hole regulating pressure plate 21.

2. A wind turbine blade device with deicing capability according to claim 1, characterized in that: The trailing edge wind deflector (14) is fixedly mounted to the blade shell (11) on a side close to the blade shell (11).

3. A wind turbine blade device with deicing capability according to claim 1, characterized in that: The leading edge wind deflector (18) is fixedly mounted to the leading edge web (13) on one side thereof close to the leading edge web (13).

4. A wind turbine blade device with deicing capability according to claim 1, characterized in that: The heating and ventilation device (19) is fixedly mounted on the ventilation pipe (17) at a side close to the ventilation pipe (17).

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