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CN-120211986-B - Double-impeller wind driven generator

CN120211986BCN 120211986 BCN120211986 BCN 120211986BCN-120211986-B

Abstract

The invention discloses a double-impeller wind driven generator, which belongs to the technical field of wind power generation and comprises a tower, a pivot, two impellers, a transmission mechanism, a generator, a transmission mechanism, a yaw mechanism and a control system, wherein the pivot is rotationally connected with the tower through a bearing, a cabin is arranged at the top of the pivot, the two impellers are respectively arranged at two opposite ends of the cabin, the rotation direction of one impeller is opposite to that of the other impeller, the two impellers are in transmission connection with the transmission mechanism, the input end of the generator is connected with the output end of the transmission mechanism, and the yaw mechanism is used for driving the pivot to axially rotate around the tower so as to change the direction of the impellers. The control system is respectively and electrically connected with the transmission mechanism, the impeller mechanism, the generator and the yaw mechanism, and is used for managing the operation of the monitoring equipment. The invention can reduce the mechanical load of the engine room, and improve the wind energy capturing efficiency by optimizing the stress distribution and enhancing the structural strength, thereby improving the power generation efficiency.

Inventors

  • LUO LIQING

Assignees

  • 珠海市金湾区骏晨风电科技有限公司

Dates

Publication Date
20260508
Application Date
20250402

Claims (11)

  1. 1. A bilobed wheel wind power generator, comprising: a tower (100); The pivot (200) is arranged in the tower (100), the pivot (200) and the tower (100) are coaxially arranged, the pivot (200) is rotationally connected with the tower (100), a cabin (210) is arranged at the top of the pivot (200), and the cabin (210) is fixedly connected with the pivot (200); Two impellers (300), wherein the two impellers (300) are respectively arranged at two opposite ends of the engine room (210), and the rotation direction of one impeller (300) is opposite to the rotation direction of the other impeller (300); the transmission mechanism (400) is arranged in the engine room (210), and the two impellers (300) are in transmission connection with the transmission mechanism (400); the generator (500) is arranged in the engine room (210), and the input end of the generator (500) is connected with the output end of the transmission mechanism (400); the rotating mechanism (600), the rotating mechanism (600) is fixedly connected with the tower (100) mechanism, the rotating mechanism (600) is rotationally connected with the pivot (200), the rotating mechanism (600) is used for supporting the pivot (200) to rotate, the rotating mechanism (600) comprises a first bearing (610), and the first bearing (610) is arranged at the bottom of the pivot (200); A yaw mechanism (700), the yaw mechanism (700) being disposed between the tower (100) and the pivot (200), the yaw mechanism (700) being configured to drive the pivot (200) to rotate about an axis of the tower (100) to change an orientation of the impeller (300); The yaw mechanism (700) further comprises a plurality of yaw limiting assemblies (730), the yaw limiting assemblies (730) are all arranged on the tower (100) along the circumferential direction, the yaw limiting assemblies (730) are all connected with the pivot (200), the yaw limiting assemblies (730) are uniformly distributed on the periphery of the first bearing (610), and the yaw limiting assemblies (730) are configured to be capable of radially adjusting the vertical state of the pivot (200) so as to keep the axis of the pivot (200) vertical; The yaw limiting assembly (730) comprises an adjusting drive (731), a supporting seat (732) and an adjusting block (733), wherein the supporting seat (732) is fixed on the tower (100), the adjusting drive (731) is installed on the supporting seat (732), the adjusting block (733) is in transmission connection with the output end of the adjusting drive (731), the adjusting block (733) is configured to be adapted to the shape of the outer wall of the pivot (200), and the adjusting drive (731) controls the adjusting block (733) to move radially along the pivot (200) so as to finely adjust the vertical state of the pivot (200); The yaw mechanism (700) comprises a yaw drive assembly (710), the yaw drive assembly (710) is arranged on the tower (100), the yaw drive assembly (710) is connected with the pivot (200), and the yaw drive assembly (710) is used for providing power for yaw movement of the pivot (200); The yaw drive assembly (710) includes: a yaw gear ring (711), wherein the yaw gear ring (711) is arranged on the pivot (200), and the yaw gear ring (711) is coaxially arranged with the pivot (200); A yaw gear motor (712), the yaw gear motor (712) being provided on the tower (100), the yaw gear motor (712) being engaged with the yaw gear to cause the yaw ring gear (711) to cooperatively drive the pivot (200) to rotate; the yaw mechanism (700) further comprises a yaw auxiliary assembly (720), wherein the yaw auxiliary assembly (720) is arranged on the tower (100), the yaw auxiliary assembly (720) is connected with the pivot (200), and the yaw auxiliary assembly (720) is used for assisting the yaw driving assembly (710) so as to enable the pivot (200) to rotate stably; The yaw auxiliary assembly (720) comprises a plurality of auxiliary gears (721), the plurality of auxiliary gears (721) are arranged on the tower (100), each auxiliary gear (721) is meshed with the yaw gear ring (711), the yaw gear motor (712) and the plurality of auxiliary gears (721) are uniformly distributed on the periphery of the pivot (200) along the circumferential direction, the yaw gear rings (711) are coaxially sleeved on the outer side of the pivot (200), and the yaw gear rings (711) are positioned at the bottom of the pivot (200); the control system is respectively and electrically connected with the impeller (300), the transmission mechanism (400), the generator (500), the rotating mechanism (600) and the yaw mechanism (700), and is used for managing equipment operation.
  2. 2. The twin-bladed wind generator of claim 1, characterized in that the yaw pinion motor (712) is equipped with a brake configured to lock the yaw pinion motor (712) when the yaw motion is stopped, preventing unintended rotation of the pivot shaft (200).
  3. 3. The dual bladed wind turbine of claim 1, wherein the yaw drive assembly (710) further includes a plurality of weather sensors disposed on at least one of the tower (100), the nacelle (210), and the bladed wheel (300), the weather sensors being electrically connected to the control system, the weather sensors monitoring weather data in real time and being fed back to the control system, the control system sending commands to drive the yaw gear motor (712) to cause the yaw ring (711) to rotate the pivot (200) to adjust the yaw alignment of the bladed wheel (300) to the wind direction.
  4. 4. The dual impeller wind generator according to claim 1, characterised in that the pivot shaft (200) is rotatably connected to the tower (100) by means of the first bearing (610), the first bearing (610) being configured to support the weight of the pivot shaft (200) and the nacelle (210) and to allow the pivot shaft (200) to rotate within the tower (100); The rotation mechanism (600) comprises a second bearing (620), the second bearing (620) is arranged at the top of the pivot (200), the second bearing (620) is fixedly arranged on the inner wall of the tower (100), and the second bearing (620) is configured to support radial load of the second bearing (620).
  5. 5. The double impeller wind power generator according to claim 1, characterized in that the transmission mechanism (400) comprises: Two first bevel gears (410), each impeller (300) is correspondingly provided with one first bevel gear (410), and each first bevel gear (410) is connected with the corresponding impeller (300) through a driving shaft (411); The top parts of the two first bevel gears (410) are meshed with the second bevel gears (420) together, and the top parts of the second bevel gears (420) are fixedly connected with a transmission shaft (421); A third bevel gear (430), the third bevel gear (430) being coaxially arranged with the second bevel gear (420), the third bevel gear (430) being arranged at an end of the drive shaft (421) remote from the second bevel gear (420); The planetary gear set (440), the input of planetary gear set (440) is equipped with fourth bevel gear (450), the bottom of fourth bevel gear (450) mesh in third bevel gear (430), the output of planetary gear set (440) with generator (500) is connected.
  6. 6. The double-impeller wind-driven generator according to claim 5, characterized in that the planetary gear set (440) comprises a first planetary gear (441) and a second planetary gear (442), the first planetary gear (441) is coaxially arranged with the second planetary gear (442), the input end of the first planetary gear (441) is in driving connection with the output end of the fourth bevel gear (450), the input end of the second planetary gear (442) is in driving connection with the output end of the first planetary gear (441), the second planetary gear (442) is located at one end of the first planetary gear (441) far away from the fourth bevel gear (450), the output end of the second planetary gear (442) is in driving connection with a high-speed shaft (443), and the other end of the high-speed shaft (443) penetrates through the fourth bevel gear (450) to be connected with the power shaft (520) of the generator (500) through a coupling (510).
  7. 7. The double-impeller wind-driven generator according to claim 1, characterized in that an operation and maintenance ladder (220) is arranged inside the pivot (200), and the operation and maintenance ladder (220) is used for realizing the passing among the cabin (210), the pivot (200) and the tower (100) so as to facilitate the maintenance and management of equipment.
  8. 8. The double impeller wind power generator according to any of the claims 1 to 7, further comprising a brake mechanism (800), at least one of two of said impellers (300), said transmission mechanism (400) and said generator (500) being connected to said brake mechanism (800), said brake mechanism (800) being adapted to ensure a safe operation of the device.
  9. 9. The double impeller wind power generator according to claim 1, characterised in that a number of seals (211) are provided on the nacelle (210), each seal (211) being located between the nacelle (210) and the impeller (300), the seals (211) being configured to block dust in the air from entering the nacelle (210).
  10. 10. The twin-impeller wind turbine as recited in claim 9, characterised in that the seal (211) comprises a sealing chamber (2111) and a plurality of first panels (2112) and a plurality of second panels (2113) alternately arranged on the inner wall of the sealing chamber (2111) in the direction of air flow.
  11. 11. The twin-impeller wind generator according to claim 1, characterised in that the impeller (300) comprises a plurality of blades (310), the angle between the blades (310) near the nacelle side and the tower (100) being α, wherein 2 ° < α <6 °.

Description

Double-impeller wind driven generator Technical Field The invention relates to the technical field of wind power generation, in particular to a double-impeller wind driven generator. Background In the field of wind power generation, as a key device for converting wind energy into electric energy, the performance of a wind power generator directly influences the power generation efficiency and economic benefits. With the continuous rising of the global demand for clean energy, the scale of wind power generation is continuously enlarged, and the performance requirements on wind power generators are also becoming increasingly stringent. The double-impeller wind driven generator is generally provided with a yaw mechanism, and the yaw mechanism is used for driving the impeller to rotate around a vertical shaft, so that the impeller can track the change of wind direction, the impeller is guaranteed to always face into the wind, and the wind energy capturing efficiency is improved. In the prior art, the yaw mechanism directly acts on the engine room, all yaw forces are concentrated at the joint of the engine room and the tower, so that the engine room bears larger mechanical load, when the wind speed changes greatly or the wind direction changes suddenly, the vibration and the impact caused by the yaw mechanism directly act on the engine room, the risk of fatigue damage of the wind speed is increased, the stability of the integral structure of the wind driven generator is influenced, and larger potential safety hazards are brought. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the double-impeller wind driven generator which can reduce the direct stress of the engine room, thereby improving the stability and durability of the whole structure. The double-impeller wind driven generator comprises a tower, a pivot, two impellers, a transmission mechanism, a generator, a rotating mechanism, a yaw mechanism and a control system, wherein the pivot is arranged in the tower, the pivot is coaxially arranged with the tower, the pivot is rotatably connected with the tower, the top of the pivot is provided with a cabin, the cabin is fixedly connected with the pivot, the two impellers are respectively arranged at two opposite ends of the cabin, the rotating direction of one impeller is opposite to that of the other impeller, the transmission mechanism is arranged in the cabin, the two impellers are both in transmission connection with the transmission mechanism, the generator is arranged in the cabin, the input end of the generator is connected with the output end of the transmission mechanism, the rotating mechanism is fixedly connected with the tower, the rotating mechanism is rotatably connected with the pivot, the rotating mechanism is used for supporting the pivot to rotate, the yaw mechanism is arranged between the tower and the pivot, the yaw mechanism is used for driving the pivot to rotate around the axial direction of the tower so as to change the direction of the impellers, and the control system is respectively electrically connected with the impellers, the transmission mechanism, the generator, the rotating mechanism and the yaw mechanism is used for managing equipment to operate. The double-impeller wind driven generator at least has the advantages that the pivot is coaxially arranged in the tower, the bottom of the pivot is rotatably connected with the tower through the bearing, the top of the pivot is fixedly provided with the engine room, and the transmission mechanism and the generator are arranged in the engine room. The two impellers are respectively arranged at two ends of the engine room, the two impellers respectively rotate in opposite directions, and after the impellers are driven to rotate by wind, the mechanical energy is transmitted to the generator by the transmission mechanism to generate electricity. The control system monitors the wind speed, the wind direction and the running state of equipment in real time, and when the wind direction changes, the control system issues an instruction to enable the yaw mechanism to drive the pivot to rotate around the tower in the axial direction so as to drive the cabin and the impeller to adjust the orientation, ensure that the impeller always faces into the wind, and ensure the stable running of the system. From this, yaw mechanism acts on pivot and not cabin, and the yaw force passes through the pivot and transmits to the pylon, reduces the mechanical load of cabin, and the pivot passes through the bearing and is connected with the pylon, has provided more stable rotation support, reduces vibration and impact to the influence of cabin, has reduced the impact of sudden change wind to the cabin from this, reduces the potential safety hazard, on the other hand through optimizing stress distribution and reinforcing structural strength, when guaranteei