Nacelle-mounted laser wind lidar for measuring wind fields at different heights

Abstract

The present application relates to the technical fields of laser wind-radar, and discloses a cabin type laser wind-radar for measuring wind field at different heights, which comprises a supporting disc, a connecting rod, a connecting block, a supporting seat and a laser wind-radar, the top of the supporting disc is fixedly connected with the connecting rod, the outer side of the connecting rod is fixedly connected with the connecting block, the inner wall of the connecting block is provided with a servo motor, the inner wall of the connecting rod is movably connected with a supporting assembly, and the top of the supporting assembly is fixedly connected with the supporting seat.In work, the servo motor and the supporting assembly are arranged, the servo motor drives the movement of the supporting assembly during use, the position of the cabin type laser wind-radar is adjusted, the cabin type laser wind-radar can measure the wind field at different positions, the statistics of the wind field measurement data is facilitated, and the limitation of the use of the cabin type laser wind-radar is reduced.

Description

Technical Field

[0001] This invention belongs to the field of laser wind measurement radar technology, specifically a cabin-type laser wind measurement radar for measuring wind fields at different altitudes. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source that has been used by people for a long time, mainly through windmills for pumping water, grinding grain, etc. People are interested in how to use wind to generate electricity.

[0003] Wind power generation converts the kinetic energy of wind into mechanical kinetic energy, and then into electrical kinetic energy. The principle of wind power generation is to use wind to drive the windmill blades to rotate, and then use a speed increaser to increase the rotation speed to drive the generator to generate electricity. According to windmill technology, a breeze speed of about three meters per second is enough to start generating electricity. Wind power generation is becoming a hot trend in the world because it does not require fuel and does not produce radiation or air pollution.

[0004] Most current wind power generation devices use wind turbine generator sets, which can be broadly divided into three parts: a wind turbine, a generator, and a tower. The rotation of the wind turbine converts the kinetic energy of the wind into electrical energy. Currently, wind turbine generator sets are often used in conjunction with various technological products to ensure their safety. A nacelle-type lidar anemometer is one such intelligent device. By installing and fixing the lidar anemometer on the top of the wind turbine generator, it can measure distances from 50m to 400m, with a wind speed measurement range of 0m / s to 50m / s, a wind speed measurement accuracy of 0.1m / s, a wind direction measurement accuracy of ≥0.5°, and an effective measurement frequency of 4Hz, thereby recording changes in individual wind fields.

[0005] However, when using nacelle-type lidar anemometers on the market, auxiliary brackets are usually used to bolt the nacelle-type lidar anemometer to the top of the wind turbine generator. In this process, the position of the nacelle-type lidar anemometer is not easy to adjust, which means that the nacelle-type lidar anemometer can only measure the wind field at a single position and height. This is not conducive to the statistical analysis of wind field measurement data and increases the limitations of the use of nacelle-type lidar anemometers. Summary of the Invention

[0006] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides a cabin-type laser wind measuring radar for measuring wind fields at different altitudes, which effectively solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a nacelle-type laser wind measuring radar for measuring wind fields at different altitudes, comprising a support plate, a connecting rod, a connecting block, a support base, and a laser wind measuring radar. The top of the support plate is fixedly connected to the connecting rod, and the outer side of the connecting rod is fixedly connected to the connecting block. A servo motor is provided on the inner wall of the connecting block. A support assembly is movably connected to the inner wall of the connecting rod. A support base is fixedly connected to the top of the support assembly. The laser wind measuring radar is fixedly connected to the top of the support base. A fixing screw is threaded onto the inner wall of the support plate, and a suction cup is fixedly connected to the bottom of the support plate.

[0008] The support assembly includes a lead screw, a limiting block, a limiting groove, a threaded sleeve, a first bevel gear, and a second bevel gear. The output end of the servo motor is fixedly connected to the second bevel gear on the inner wall of the connecting rod. The servo motor is used to drive the rotation of the second bevel gear. The inner wall of the connecting rod is movably connected to the second bevel gear. The inner side of the first bevel gear is fixedly connected to a threaded sleeve. The inner side of the threaded sleeve is threadedly connected to the lead screw. The inner wall of the lead screw has a limiting groove. The inner wall of the connecting rod is fixedly connected to the limiting groove.

[0009] The inner wall of the support plate has a connecting groove, and a stop rod is elastically connected to the inner wall of the connecting groove. A pressure rod is fixedly connected to the top of the stop rod. The inner wall of the support plate and both sides of the connecting groove have air pressure grooves. An insert rod is elastically connected to the inner side of the connecting groove. A sealed piston is fixedly connected to the end of the insert rod and close to the inner wall of the air pressure groove. A piston block is slidably connected to the inner wall of the air pressure groove. A groove is formed in the inner wall of the piston block. A screw is fixedly connected to the top of the piston block. A nut is threadedly connected to the top of the screw and located on the outer side of the support plate. The inner wall of the support plate has a through groove communicating with the connecting groove.

[0010] Preferably, the second bevel gear has the same size as the first bevel gear, the second bevel gear meshes with the first bevel gear, and the rotation of the second bevel gear drives the rotation of the first bevel gear.

[0011] Preferably, the rotation of the threaded sleeve is used to drive the movement of the lead screw. When the lead screw moves, the limiting groove moves along the limiting block. The lead screw is fixedly connected to the bottom of the support base, and the lead screw is used to push the support base upward.

[0012] Preferably, the connecting groove is connected to the air pressure groove, and the sealing piston is made of rubber. The sealing piston is used to block the connection between the connecting groove and the air pressure groove.

[0013] Preferably, the stop lever has a cuboid structure and is used to push the insertion rod to move. When the stop lever is at the bottom, the insertion rod will be squeezed to the bottom of the connecting groove, and a gap will be generated between the sealing piston and the connection port between the connecting groove and the air pressure groove.

[0014] Preferably, the size of the sealed piston is adapted to the size of the groove.

[0015] Preferably, the piston block is made of rubber and is fitted to the inner wall of the air pressure groove.

[0016] Preferably, the screw is used to drive the piston block to move along the pneumatic groove, and the nut is used to restrict the movement of the screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1) During operation, the servo motor and the supporting components are set up. When in use, the servo motor drives the support components to move, thereby realizing the adjustment of the position of the nacelle-type lidar anemometer. This enables the nacelle-type lidar anemometer to measure the wind field at different heights, which is beneficial for the statistics of wind field measurement data and reduces the limitations of the use of the nacelle-type lidar anemometer.

[0019] 2) The suction cup and piston block are designed to create negative pressure inside and outside the suction cup when in use. This improves the stability of the support plate, reduces the impact of wind on the nacelle-type lidar anemometer, and reduces the destructive force of wind on the fixing screws, thus extending the service life of the fixing screws and preventing them from loosening. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a front view structural diagram of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the diagram;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at point B in the diagram;

[0025] Figure 5 For the present invention Figure 2 A schematic diagram of the structure at point C in the diagram;

[0026] Figure 6 For the present invention Figure 2 The structural diagram at point D in the diagram.

[0027] In the diagram: 1. Support plate; 2. Connecting rod; 3. Connecting block; 5. Support base; 6. Laser wind radar; 7. Fixing screw; 8. Suction cup; 9. Servo motor; 10. Lead screw; 11. Limiting block; 12. Limiting groove; 13. Threaded sleeve; 14. First bevel gear; 15. Second bevel gear; 16. Connecting groove; 17. Pressure rod; 18. Stop bar; 19. Insert rod; 20. Air pressure groove; 21. Sealed piston; 22. Piston block; 23. Groove; 24. Screw; 25. Nut; 26. Through groove. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example 1, by Figure 1-6 The present invention includes a nacelle-type laser wind measuring radar for measuring wind fields at different altitudes, comprising a support plate 1, a connecting rod 2, a connecting block 3, a support base 5, and a laser wind measuring radar 6. The top of the support plate 1 is fixedly connected to the connecting rod 2, the outer side of the connecting rod 2 is fixedly connected to the connecting block 3, the inner wall of the connecting block 3 is provided with a servo motor 9, the inner wall of the connecting rod 2 is movably connected to a support assembly, the top of the support assembly is fixedly connected to the support base 5, the top of the support base 5 is fixedly connected to the laser wind measuring radar 6, the inner wall of the support plate 1 is threadedly connected to a fixing screw 7, and the bottom of the support plate 1 is fixedly connected to a suction cup 8.

[0030] The support assembly includes a lead screw 10, a limiting block 11, a limiting groove 12, a threaded sleeve 13, a first bevel gear 14, and a second bevel gear 15. The output end of the servo motor 9 is fixedly connected to the second bevel gear 15 on the inner wall of the connecting rod 2. The servo motor 9 drives the rotation of the second bevel gear 15. The second bevel gear 15 has the same dimensions as the first bevel gear 14, and the second bevel gear 15 meshes with the first bevel gear 14. The rotation of the second bevel gear 15 drives the rotation of the first bevel gear 14. The inner wall of the connecting rod 2 is movable. A second bevel gear 15 is connected, and a threaded sleeve 13 is fixedly connected to the inner side of the first bevel gear 14. The rotation of the threaded sleeve 13 is used to drive the movement of the lead screw 10. When the lead screw 10 moves, the limiting groove 12 will move along the limiting block 11. The lead screw 10 is fixedly connected to the bottom of the support base 5. The lead screw 10 is used to push the support base 5 to move upward. The lead screw 10 is threadedly connected to the inner side of the threaded sleeve 13. The inner wall of the lead screw 10 is provided with a limiting groove 12. The inner wall of the connecting rod 2 and the inner side of the limiting groove 12 are fixedly connected to the limiting block 11.

[0031] Example 2, by Figure 1-6 The support plate 1 has a connecting groove 16 on its inner wall, which communicates with the air pressure groove 20. The sealing piston 21 is made of rubber and is used to block the connection between the connecting groove 16 and the air pressure groove 20. A stop rod 18 is elastically connected to the inner wall of the connecting groove 16. The stop rod 18 has a cuboid structure and is used to push the insertion rod 19 to move. When the stop rod 18 is at its lowest position, the insertion rod 19 will be squeezed to the bottom of the connecting groove 16, and a gap will be generated between the sealing piston 21 and the connection between the connecting groove 16 and the air pressure groove 20. A pressure rod 17 is fixedly connected to the top of the stop rod 18. Air pressure grooves 20 are provided on both sides of the inner wall of the support plate 1 and on the inner side of the connecting groove 16. A flexible connecting rod 19 is provided. A sealed piston 21 is fixedly connected to the end of the connecting rod 19 and close to the inner wall of the air pressure groove 20. The size of the sealed piston 21 is adapted to the size of the groove 23. A piston block 22 is slidably connected to the inner wall of the air pressure groove 20. The piston block 22 is made of rubber and fits against the inner wall of the air pressure groove 20. A groove 23 is provided on the inner wall of the piston block 22. A screw 24 is fixedly connected to the top of the piston block 22. The screw 24 is used to drive the piston block 22 to move along the air pressure groove 20. A nut 25 is used to limit the movement of the screw 24. A nut 25 is threadedly connected to the top of the screw 24 and located on the outer side of the support plate 1. A through groove 26 communicating with the connecting groove 16 is provided on the inner wall of the support plate 1.

[0032] Working principle: During operation, the support plate 1 is first fixed to the top of the wind turbine by the bolts of the fixing screws 7. At this moment, the suction cup 8 is squeezed between the top of the wind turbine and the suction cup 8. Under the action of the air pressure groove 20, as... Figure 5Therefore, the gas in the suction cup 8 is compressed into the air pressure groove 20. At this moment, the sealed piston 21 is located below the connection between the air pressure groove 20 and the connecting groove 16, so that the gas in the air pressure groove 20 enters the connecting groove 16. Under the connection of the through groove 26, the air pressure groove 20 is connected to the outside atmosphere. At this moment, the suction cup 8 contacts the top of the wind turbine and is squeezed. Under the connection of the fixing screw 7, the support plate 1 is fixed to the top of the wind turbine. Then, the servo motor 9 in the connecting block 3 is started, so that the output shaft of the servo motor 9 rotates clockwise, thereby driving the movement of the support component.

[0033] At this moment, the servo motor 9 will drive the second bevel gear 15 to rotate. Since the second bevel gear 15 meshes with the first bevel gear 14, the first bevel gear 14 will rotate accordingly, thereby driving the inner threaded sleeve 13 to rotate as well. Because the threaded sleeve 13 is threadedly connected to the lead screw 10, such as... Figure 3 As shown, under the limiting connection of the limiting block 11 and the limiting slide 12, the lead screw 10 will move upward along the inner wall of the connecting rod 2. During the upward movement of the lead screw 10, the bottom of the lead screw 10 gradually separates from the pressure rod 17, so that the stop rod 18 returns to the middle of the connecting groove 16 under the action of the spring in the connecting groove 16. At this moment, the return of the stop rod 18 will cause the spring at the top of the insertion rod 19 to return to its original length. At this moment, the insertion rod 19 drives the sealing piston 21 to move upward, so that the sealing piston 21 blocks the connection between the air pressure groove 20 and the connecting groove 16. The sealing piston 21 will be located in the groove 23. At this moment, the air pressure groove 20 is in a sealed environment. At this moment, the normal use of the laser wind radar 6 can be maintained to calculate the wind field.

[0034] Since the lead screw 10 is fixedly connected to the support base 5, the support base 5 will move upwards at this moment. After moving to the specified height, the servo motor 9 will stop working. At this moment, the support base 5 will stop, and the bottom of the lead screw 10 will be completely separated from the pressure rod 17. At the same time, the screw 24 will be pulled upwards and the nut 25 will be tightened, causing the screw 24 to move upwards. This will drive the piston block 22 at the bottom of the screw 24 to move upwards along the air pressure groove 20. At this moment, the air pressure in the part below the piston block 22 in the air pressure groove 20 will decrease, and negative pressure will be formed inside and outside the suction cup 8. This will improve the stability of the support plate 1, share the impact of wind on the nacelle-type lidar anemometer, reduce the destructive force of wind on the fixing screw 7, make the service life of the fixing screw 7 longer, and prevent the fixing screw 7 from loosening.

[0035] If it is necessary to measure the wind field at a higher position, the servo motor 9 is restarted, causing the output shaft of the servo motor 9 to rotate clockwise. At this time, the support base 5 will continue to rise. The normal use of the laser wind radar 6 can calculate the wind field changes at a higher position.

[0036] When the nacelle-type lidar anemometer needs to be removed, the servo motor 9 needs to be driven to rotate the output shaft of the servo motor 9 counterclockwise. This causes the lead screw 10 to move to the lowest end, so that the bottom of the lead screw 10 presses the pressure rod 17 to the bottom of the connecting groove 16 again. This causes the stop rod 18 to move the insertion rod 19, causing the sealing piston 21 to move down. The sealing piston 21 is located below the connection between the air pressure groove 20 and the connecting groove 16, so that the gas in the air pressure groove 20 will enter the connecting groove 16. Under the connection of the through groove 26, the air pressure groove 20 is connected to the outside atmosphere, the negative pressure in the suction cup 8 disappears, and then the fixing screw 7 can be loosened to remove it.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nacelle-type laser wind measuring radar for measuring wind fields at different altitudes, comprising a support plate (1), a connecting rod (2), a connecting block (3), a support base (5), and a laser wind measuring radar (6), characterized in that: A connecting rod (2) is fixedly connected to the top of the support plate (1), a connecting block (3) is fixedly connected to the outside of the connecting rod (2), a servo motor (9) is provided on the inner wall of the connecting block (3), a support assembly is movably connected to the inner wall of the connecting rod (2), a support seat (5) is fixedly connected to the top of the support assembly, a laser wind measuring radar (6) is fixedly connected to the top of the support seat (5), a fixing screw (7) is threadedly connected to the inner wall of the support plate (1), and a suction cup (8) is fixedly connected to the bottom of the support plate (1). The support assembly includes a lead screw (10), a limiting block (11), a limiting groove (12), a threaded sleeve (13), a first bevel gear (14), and a second bevel gear (15). The output end of the servo motor (9) is fixedly connected to the second bevel gear (15) on the inner wall of the connecting rod (2). The servo motor (9) is used to drive the rotation of the second bevel gear (15). The inner wall of the connecting rod (2) is movably connected to the second bevel gear (15). The inner side of the first bevel gear (14) is fixedly connected to the threaded sleeve (13). The inner side of the threaded sleeve (13) is threadedly connected to the lead screw (10). The inner wall of the lead screw (10) is provided with a limiting groove (12). The inner wall of the connecting rod (2) and the inner side of the limiting groove (12) are fixedly connected to the limiting block (11). The inner wall of the support plate (1) is provided with a connecting groove (16), and a stop bar (18) is elastically connected to the inner wall of the connecting groove (16). A pressure bar (17) is fixedly connected to the top of the stop bar (18). Air pressure grooves (20) are provided on both sides of the inner wall of the support plate (1) and on both sides of the connecting groove (16). An insert rod (19) is elastically connected to the inner side of the connecting groove (16). A sealed piston (21) is fixedly connected to the end of the insert rod (19) and close to the inner wall of the air pressure groove (20). A piston block (22) is slidably connected to the inner wall of the air pressure groove (20). A groove (23) is provided on the inner wall of the piston block (22). A screw (24) is fixedly connected to the top of the piston block (22). A nut (25) is threadedly connected to the top of the screw (24) and on the outer side of the support plate (1). A through groove (26) communicating with the connecting groove (16) is provided on the inner wall of the support plate (1).

2. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The second bevel gear (15) has the same size as the first bevel gear (14). The second bevel gear (15) meshes with the first bevel gear (14). The rotation of the second bevel gear (15) is used to drive the rotation of the first bevel gear (14).

3. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The rotation of the threaded sleeve (13) is used to drive the movement of the lead screw (10). When the lead screw (10) moves, the limiting groove (12) will move along the limiting block (11). The lead screw (10) is fixedly connected to the bottom of the support seat (5). The lead screw (10) is used to push the support seat (5) to move upward.

4. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The connecting groove (16) is connected to the air pressure groove (20), and the sealing piston (21) is made of rubber. The sealing piston (21) is used to block the connection between the connecting groove (16) and the air pressure groove (20).

5. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The stop lever (18) has a cuboid structure. The stop lever (18) is used to push the insertion rod (19) to move. When the stop lever (18) is at the bottom, the insertion rod (19) will be squeezed to the bottom of the connecting groove (16), and the sealing piston (21) will create a gap between the connecting groove (16) and the connection port of the air pressure groove (20).

6. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The dimensions of the sealed piston (21) are adapted to the dimensions of the groove (23).

7. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The piston block (22) is made of rubber and is attached to the inner wall of the air pressure groove (20).

8. The nacelle-type laser wind measuring radar for measuring wind fields at different altitudes according to claim 1, characterized in that: The screw (24) is used to drive the piston block (22) to move along the air pressure groove (20), and the nut (25) is used to restrict the movement of the screw (24).

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