阅读说明：本技术 一种具有电热防冰功能的可伸缩式风机叶片 (Retractable fan blade with electric heating anti-icing function ) 是由 罗小林 张林通 张敬华 陈冰 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种具有电热防冰功能的可伸缩式风机叶片,属于风力发电技术领域。本发明包括一级伸缩叶片、二级伸缩叶片、主叶片、电加热区域、薄膜太阳能电池以及电动机；所述一级伸缩叶片前缘划分了若干电加热区域,实现对覆冰严重的叶尖进行电热防冰；所述一级伸缩叶片滑动安装在二级伸缩叶片中,所述二级伸缩叶片滑动安装在主叶片中。本发明通过电动机带动一级伸缩叶片在二级伸缩叶片内腔滑动,到限定位置时带动二级伸缩叶片在主叶片内腔中滑动,进而改变叶片整体的长度,以适应强风天气,保护受载荷较大的叶尖部位免受损伤。(The invention discloses a telescopic fan blade with an electric heating anti-icing function, and belongs to the technical field of wind power generation. The invention comprises a primary telescopic blade, a secondary telescopic blade, a main blade, an electric heating area, a thin-film solar cell and a motor; the front edge of the first-stage telescopic blade is divided into a plurality of electric heating areas, so that the electric heating anti-icing of the blade tip with serious icing is realized; the first-stage telescopic blades are slidably mounted in the second-stage telescopic blades, and the second-stage telescopic blades are slidably mounted in the main blades. The motor drives the first-stage telescopic blade to slide in the inner cavity of the second-stage telescopic blade, and drives the second-stage telescopic blade to slide in the inner cavity of the main blade when the motor reaches a limited position, so that the overall length of the blade is changed to adapt to strong wind weather and protect the blade tip part with larger load from being damaged.)

1. The utility model provides a retractable fan blade with electric heat anti-icing function which characterized in that: comprises a first-stage telescopic blade (1), a second-stage telescopic blade (3) and a main blade (8); the primary telescopic blade (1) is slidably mounted in the secondary telescopic blade (3), and the secondary telescopic blade (3) is slidably mounted in the main blade (8).

2. The retractable fan blade with electric heating anti-icing function of claim 1, characterized in that: the device also comprises a connecting rod (6), a threaded lead screw (11), a disc (12) and a motor (13); the upper end of the connecting rod (6) is fixedly connected to the root part (5) of the first-stage telescopic blade, the middle part of the connecting rod (6) penetrates through the root part (10) of the second-stage telescopic blade, and the bottom of the connecting rod (6) is fixedly connected with a disc (12); threaded holes are formed in the middle of the disc (12), the disc (12) can move up and down along with the rotation of the threaded lead screw (11), the motor (13) is fixedly installed at the bottom of the main blade (8), one end of the motor (13) is fixedly connected with the threaded lead screw (11), and the other end of the threaded lead screw (11) penetrates through the disc (12) and then is suspended.

3. The retractable fan blade with electric heating anti-icing function of claim 1, characterized in that: an elastic fastener I (4) is additionally arranged on the periphery of the root part (5) of the first-stage telescopic blade, and an elastic fastener II (9) is additionally arranged on the periphery of the root part (10) of the second-stage telescopic blade.

4. The retractable fan blade with electric heating anti-icing function of claim 1, characterized in that: the first-stage telescopic blade (1) is provided with a first elastic sealing ring gasket (2) at the contact position with the second-stage telescopic blade (3), and a second elastic sealing ring gasket (7) is provided at the contact position between the second-stage telescopic blade (3) and the main blade (8).

5. The retractable fan blade with electric heating anti-icing function of claim 1, characterized in that: the connecting rod (6) is a hollow rod, and the other end of the threaded lead screw (11) is suspended in the connecting rod (6) after penetrating through the disc (12).

6. The retractable fan blade with electric heating anti-icing function of claim 3, characterized in that: the elastic fastener I (4) and the elastic fastener II (9) are identical in structure, the elastic fastener I (4) is composed of a wing-shaped fastening ring (18) and a plurality of ball springs, so that the first-stage telescopic blade (1) can slide on the inner wall of the second-stage telescopic blade (3), and the second-stage telescopic blade (3) can slide on the inner wall of the main blade (8); the ball (14) and the spring (15) in the ball spring are both fixed in the spring groove (16) in a built-in mode, one part of the ball spring is exposed out of the spring groove (16), and the spring groove (16) is fixedly connected to the wing-shaped fastening ring (18) through the positioning pin (17).

7. The retractable fan blade with electric heating anti-icing function of claim 1, characterized in that: an electric heating area (19) is arranged at the front edge of the primary telescopic blade (1), the electric heating area (19) is divided into a plurality of areas, an environment temperature sensor (22) is connected with a controller, and the controller is connected with the electric heating area (19).

8. The retractable fan blade with electric heating anti-icing function of claim 7, characterized in that: when the feedback temperature of the ambient temperature sensor (22) is lower than 0 ℃, the controller controls the periodic alternate heating of a plurality of areas in the electric heating area (19).

9. The retractable fan blade with electric heating anti-icing function according to any one of claims 2 or 7, characterized in that: the electricity needed by the motor (13) and the electricity heating area (19) is supplied by a thin film solar cell (20) arranged at the top of a cabin (21) above the tower of the fan.

Technical Field

The invention relates to a telescopic fan blade with an electric heating anti-icing function, and belongs to the technical field of wind power generation.

Background

As the power of wind generators continues to increase, the length of the blades of wind generators also continues to increase. Especially, offshore wind power generators, megawatt wind power generators are increasingly bulky.

The blade is one of key components of the wind generating set, and mainly converts the wind speed of natural wind into the kinetic energy of the wind generating set and then converts the kinetic energy into electric energy through the generator.

In extreme severe windy weather, the wind driven generator cannot normally work, if the blades of the wind turbine are too large, the blades can be damaged to a certain extent even in a shutdown environment, particularly the blade tips with larger loads are weak in general pressure resistance, and meanwhile, the blade tips are also main regions for icing in winter, so that the blade loads are increased due to the icing.

The existing technology usually solves the problem of severe weather in strong wind through a variable pitch system, and according to the aerodynamic principle, the paddle feathers rotate for 90 degrees and are parallel to the wind direction, so that the purpose of stopping the machine is achieved, but some problems are brought about: the wind driven generator can not work when being stopped, and can be damaged when meeting strong wind.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention provides a telescopic fan blade with an electric heating anti-icing function, which is used for overcoming the problems that the conventional wind driven generator is easy to damage in strong wind weather, the blade tip is iced to reduce the generating power of a fan and the service life of the fan is shortened.

The technical scheme of the invention is as follows: a telescopic fan blade with electric heating anti-icing function comprises a primary telescopic blade 1, a secondary telescopic blade 3 and a main blade 8; the first-stage telescopic blade 1 is slidably mounted in the second-stage telescopic blade 3, and the second-stage telescopic blade 3 is slidably mounted in the main blade 8.

As a further scheme of the invention, the device also comprises a connecting rod 6, a threaded screw rod 11, a disc 12 and a motor 13; the upper end of the connecting rod 6 is fixedly connected to the root part 5 of the first-stage telescopic blade, the middle part of the connecting rod 6 penetrates through the root part 10 of the second-stage telescopic blade, and the bottom of the connecting rod 6 is fixedly connected with a disc 12; the middle part of the disc 12 is provided with a threaded hole, the disc 12 can move up and down along with the rotation of the threaded lead screw 11, the motor 13 is fixedly installed at the bottom of the main blade 8, one end of the motor 13 is fixedly connected with the threaded lead screw 11, and the other end of the threaded lead screw 11 is suspended after penetrating through the disc 12.

As a further scheme of the invention, an elastic fastener I4 is additionally arranged on the periphery of a root part 5 of the first-stage telescopic blade, and an elastic fastener II 9 is additionally arranged on the periphery of a root part 10 of the second-stage telescopic blade.

As a further scheme of the invention, an elastic sealing ring gasket I2 is arranged at the contact part of the first-stage telescopic blade 1 and the second-stage telescopic blade 3, and an elastic sealing ring gasket II 7 is arranged at the contact part of the second-stage telescopic blade 3 and the main blade 8.

As a further scheme of the invention, the connecting rod 6 is a hollow rod, and the other end of the threaded lead screw 11 is suspended in the connecting rod 6 after penetrating through the disc 12.

As a further scheme of the invention, the first elastic fastening piece 4 and the second elastic fastening piece 9 have the same structure, and the first elastic fastening piece 4 is composed of a wing-shaped fastening ring 18 and a plurality of ball springs, so that the first-stage telescopic blade 1 slides on the inner wall of the second-stage telescopic blade 3, and the second-stage telescopic blade 3 slides on the inner wall of the main blade 8; the ball 14 and the spring 15 in the ball spring are both fixed in the spring slot 16, and a part of the spring slot 16 is exposed, and the spring slot 16 is fixedly connected on the wing-shaped fastening ring 18 through the positioning pin 17.

As a further scheme of the invention, an electric heating area 19 is arranged at the front edge of the primary telescopic blade 1, the electric heating area 19 is divided into a plurality of areas, an ambient temperature sensor 22 is connected with a controller, and the controller is connected with the electric heating area 19.

As a further aspect of the present invention, the controller controls the periodic alternating heating of several zones within the electrically heated zone 19 when the ambient temperature sensor 22 feeds back a temperature below 0 ℃.

As a further aspect of the invention, the electricity required by the electric motor 13 or the electric heating area 19 is supplied by a thin film solar cell 20 arranged on top of a nacelle 21 above the tower of the wind turbine.

The invention has the beneficial effects that:

1. the invention adopts the first-stage telescopic blade, the second-stage telescopic blade and the main blade, and the telescopic range is greatly increased compared with the single blade tip and blade root telescopic.

2. The invention only utilizes the threaded lead screw to drive the first-stage telescopic blade to slide up and down in the second-stage telescopic blade, and further drives the second-stage telescopic blade to slide up and down in the main blade, so that the structure is light.

3. The elastic fastener adopted by the invention is composed of a wing-shaped fastening ring and a plurality of ball springs, so that the stability of the first-stage telescopic blade and the second-stage telescopic blade can be improved, and sliding contact can be realized.

4. According to the invention, the thin-film solar cell is arranged on the top of the cabin to realize autonomous power supply for the motor and the electric heating area, and the periodic heating can greatly save power.

Drawings

FIG. 1 is a schematic view of the overall construction of a blade according to the present invention;

FIG. 2 is a detail view of a cut surface of the elastic fastener of the present invention;

FIG. 3 is a schematic view of a wind turbine nacelle of the present invention.

Reference numbers in fig. 1-3: 1-first-stage telescopic blade, 2-elastic sealing ring gasket I, 3-second-stage telescopic blade, 4-elastic fastener I, 5-first-stage telescopic blade root, 6-connecting rod, 7-elastic sealing ring gasket II,

8-main blade, 9-elastic fastener II, 10-secondary telescopic blade root, 11-threaded screw rod, 12-disc, 13-motor, 14-ball, 15-spring, 16-spring groove, 17-positioning pin, 18-wing fastening ring, 19-electric heating area, 20-thin film solar cell, 21-cabin and 22-environment temperature sensor.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Example 1: as shown in fig. 1-3, a retractable fan blade with electric heating anti-icing function comprises a primary retractable blade 1, a secondary retractable blade 3 and a main blade 8; the first-stage telescopic blade 1 is slidably mounted in the second-stage telescopic blade 3, and the second-stage telescopic blade 3 is slidably mounted in the main blade 8.

As a further scheme of the invention, the device also comprises a connecting rod 6, a threaded screw rod 11, a disc 12 and a motor 13; the upper end of the connecting rod 6 is fixedly connected to the root part 5 of the first-stage telescopic blade, the middle part of the connecting rod 6 penetrates through the root part 10 of the second-stage telescopic blade, and the bottom of the connecting rod 6 is fixedly connected with a disc 12; the middle part of the disc 12 is provided with a threaded hole, the disc 12 can move up and down along with the rotation of the threaded lead screw 11, the motor 13 is fixedly installed at the bottom of the main blade 8, one end of the motor 13 is fixedly connected with the threaded lead screw 11, and the other end of the threaded lead screw 11 is suspended after penetrating through the disc 12.

As a further scheme of the invention, an elastic fastener I4 is additionally arranged on the periphery of a root part 5 of the first-stage telescopic blade, and an elastic fastener II 9 is additionally arranged on the periphery of a root part 10 of the second-stage telescopic blade.

As a further scheme of the invention, an elastic sealing ring gasket I2 is arranged at the contact part of the first-stage telescopic blade 1 and the second-stage telescopic blade 3, and an elastic sealing ring gasket II 7 is arranged at the contact part of the second-stage telescopic blade 3 and the main blade 8.

As a further scheme of the invention, the connecting rod 6 is a hollow rod, and the other end of the threaded lead screw 11 is suspended in the connecting rod 6 after penetrating through the disc 12.

As a further scheme of the invention, the first elastic fastening piece 4 and the second elastic fastening piece 9 have the same structure, and the first elastic fastening piece 4 is composed of a wing-shaped fastening ring 18 and a plurality of ball springs, so that the first-stage telescopic blade 1 slides on the inner wall of the second-stage telescopic blade 3, and the second-stage telescopic blade 3 slides on the inner wall of the main blade 8; the ball 14 and the spring 15 in the ball spring are both fixed in the spring slot 16, and a part of the spring slot 16 is exposed, and the spring slot 16 is fixedly connected on the wing-shaped fastening ring 18 through the positioning pin 17.

As a further scheme of the invention, an electric heating area 19 is arranged at the front edge of the primary telescopic blade 1, the electric heating area 19 is divided into a plurality of areas, an ambient temperature sensor 22 is connected with a controller, and the controller is connected with the electric heating area 19.

As a further aspect of the present invention, the controller controls the periodic alternating heating of several zones within the electrically heated zone 19 when the ambient temperature sensor 22 feeds back a temperature below 0 ℃.

As a further aspect of the invention, the electricity required by the electric motor 13 or the electric heating area 19 is supplied by a thin film solar cell 20 arranged on top of a nacelle 21 above the tower of the wind turbine.

The working principle of the invention is as follows: when the blade is in normal state, when needing to contract, motor 13 drives the reversal of screw thread lead screw 11, and the reversal of screw thread lead screw drives disc 12 and descends, and then one-level flexible blade 1 slides down in second grade blade inside, when one-level flexible blade root 5 descends to second grade flexible blade root 10 position, second grade flexible blade 3 begins to slide down in main blade 8's inside under the drive of one-level flexible blade 1, until disc 12 descends to screw thread lead screw 11 bottom, whole blade contraction process finishes.

When the blade is in the shrink state, when needing to extend, motor 13 drives screw 11 corotation, screw's corotation drives disc 12 and rises, and then one-level retractable blade 1 upwards slides in second grade retractable blade 3 is inside, when one-level retractable blade root 5 rises to the 3 top positions of second grade retractable blade, second grade retractable blade 3 begins upwards sliding in main blade 8's inside under one-level retractable blade 1's drive, until disc 12 rises to screw 11 top positions, whole blade extension process finishes.

The electric heating area 19 is arranged at the front edge of the first-stage telescopic blade 1 and is divided into 6 partitions, when the feedback temperature of the ambient temperature sensor 22 is lower than 0 ℃, the controller controls the electric heating part in the electric heating area 19 to heat the partitions 1, 3 and 5, after the electric heating area is heated for 9 seconds, the controller controls the electric heating part in the electric heating area 19 to heat the partitions 2, 4 and 6, the heating is carried out for 9 seconds, the heating mode is carried out periodically, and the electric motor 13 and the electric heating area 19 need to be powered by the thin-film solar cell 20 arranged at the top of the cabin 21.

While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes and modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.