Active wind facing structure of wind driven generator

Abstract

The utility model belongs to the technical field of wind driven generators, and particularly relates to an active wind facing structure of a wind driven generator. Comprising a cabin, a supporting shaft, a heat dissipation assembly and a wind facing transmission assembly. The supporting shaft penetrates through the bottom of the cabin and is rotationally connected with the cabin; the part, outside the cabin, of the supporting shaft is fixedly connected with the tower pole, and the part, inside the cabin, of the supporting shaft is fixedly connected with a first gear; the heat dissipation assembly and the wind facing transmission assembly are installed in the cabin, the position of the heat dissipation assembly is fixed, the wind facing transmission assembly comprises a clutch mechanism, and the clutch mechanism can control the wind facing transmission assembly to be connected with or separated from the heat dissipation assembly and the first gear so as to connect or disconnect torque transmission between the heat dissipation assembly and the first gear; according to the utility model, an originally independent heat dissipation driving system and an active wind facing driving system are integrated; according to the integrated design, a set of driving motor is omitted, and the equipment manufacturing cost and the energy consumption are remarkably reduced.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, specifically relating to an active wind-fighting structure for a wind turbine. Background Technology

[0002] In the field of wind power technology, the nacelle of a wind turbine needs to adjust its orientation in real time according to the wind direction (i.e., "wind alignment") to ensure that the rotor can capture wind energy to the maximum extent. Currently, the active wind alignment structure of mainstream wind turbines generally adopts an independent drive system. At the same time, the nacelle generates a lot of heat due to the operation of core equipment such as generators and frequency converters, requiring the configuration of an independent heat dissipation component. This heat dissipation component also relies on a separate drive motor for power, forming two independent power systems: "active wind alignment drive" and "heat dissipation drive".

[0003] This dual-independent drive system has significant drawbacks: First, the hardware cost is high, requiring the purchase of two additional drive motors, increasing equipment manufacturing and installation costs. Second, energy consumption is redundant; the separate operation of the two systems consumes additional electricity generated by the wind power system, failing to meet the energy-saving requirements of the wind power generation field. Third, the active wind-following drive system has a high idle rate—since wind direction changes are not continuous, the active wind-following structure only needs to be activated for adjustment when the wind direction deviation exceeds a set threshold; for most of the remaining operating time, the drive system is idle, resulting in wasted equipment resources and failing to achieve efficient utilization of function and power. Therefore, how to integrate the active wind-following and heat dissipation functions of the wind turbine into a drive system, reduce hardware costs and energy consumption, and decrease equipment idle rate is the problem that this utility model aims to solve. Utility Model Content

[0004] This invention addresses the problem that existing wind turbines use two independent drive systems for the nacelle heat dissipation components and the active wind-fighting structure, while the active wind-fighting structure's drive system has a high idle rate.

[0005] This utility model provides the following technical solution: an active wind-following structure for a wind turbine, including a nacelle, a support shaft, a heat dissipation assembly, and a wind-following transmission assembly; the support shaft passes through the bottom of the nacelle and is rotatably connected to the nacelle; the part of the support shaft located outside the nacelle is fixedly connected to the tower, and the part of the support shaft located inside the nacelle is fixedly connected to a first gear; the heat dissipation assembly and the wind-following transmission assembly are installed inside the nacelle, the position of the heat dissipation assembly is fixed, and the wind-following transmission assembly includes a clutch mechanism, which can control the engagement or disengagement of the wind-following transmission assembly with the heat dissipation assembly and the first gear, thereby connecting or disconnecting the torque transmission between the heat dissipation assembly and the first gear.

[0006] Furthermore, the heat dissipation assembly includes a drive motor and a motor frame; the motor frame is fixed to the inner wall of the cabin, the housing of the drive motor is mounted on the motor frame, and a second gear, a drive roller and a fan blade are fixedly connected to the drive shaft of the drive motor from top to bottom.

[0007] Furthermore, the wind transmission assembly includes a linkage shaft, on which a third gear capable of meshing with the second gear, a linkage roller capable of rolling contact with the drive roller, and a fourth gear capable of meshing with the first gear are fixedly connected; the linkage shaft is rotatably mounted on the clutch mechanism.

[0008] Furthermore, the clutch mechanism includes a lug, a swing arm, and a push-pull unit; the lug is fixed to the inner wall of the cabin, one end of the swing arm is hinged to the lug and the other end is hinged to the moving end of the push-pull unit, the connecting end of the push-pull unit is hinged to the inner wall of the cabin, the swing arm has a corner, and the linkage shaft is rotatably installed at the corner of the swing arm.

[0009] Furthermore, there are heat dissipation vents on the nacelle below the fan blades.

[0010] Furthermore, the fan blade sheath has a protective ring, which is fixed to the inner wall of the cabin.

[0011] Furthermore, the push-pull unit includes an electric telescopic rod, one end of which is provided with a first hinge, and the other end of which is provided with a second hinge.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This invention provides an active wind-following structure for a wind turbine, integrating the originally separate heat dissipation drive system and the active wind-following drive system into one unit. The drive motor of the heat dissipation component can both drive the fan blades for heat dissipation and, when wind-following is required, engage a clutch to transmit power to the wind-following transmission component, driving the nacelle to rotate. This integrated design reduces one drive motor, significantly lowering equipment manufacturing costs and energy consumption.

[0014] When no yaw is required, the drive motor is used only to drive the fan blades to meet the nacelle's heat dissipation needs. When yaw adjustment is needed, the clutch mechanism engages, and the same drive motor can transmit power to the first gear on the support shaft to achieve yaw yaw of the nacelle. This greatly improves the utilization rate of the drive motor, solves the problem of high idle rate in traditional yaw drive systems, and reduces the total energy consumption of the system, which is in line with the energy-saving trend of wind power generation equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the active wind-fighting structure of a wind turbine.

[0016] Figure 2 This is a schematic diagram of the exterior of the cabin.

[0017] Figure 3 This is a schematic diagram of the first gear on the support shaft;

[0018] Figure 4 A schematic diagram of the heat dissipation component and the air transmission component (first-person perspective);

[0019] Figure 5 A schematic diagram of the heat dissipation component and the air transmission component (second perspective).

[0020] Figure 6 This is a schematic diagram of a push-pull unit;

[0021] Figure 7 This is a schematic diagram of the wind-driven assembly and support shaft (first-person perspective).

[0022] Figure 8 This is a schematic diagram of the wind-driven assembly and support shaft (second perspective).

[0023] In the diagram: 1-Nacelle; 101-Heat dissipation vent; 2-Wind vane; 3-Anemometer; 4-Controller; 5-Support shaft; 501-First gear; 6-Shaft brake; 7-Heat dissipation assembly; 701-Drive motor; 702-Motor frame; 703-Drive shaft; 704-Second gear; 705-Drive roller; 706-Fan blade; 707-Guard ring; 8-Wind transmission assembly; 801-Ear seat; 802-Swing arm; 803-Linkage shaft; 804-Third gear; 805-Push-pull unit; 8051-First hinge; 8052-Electric telescopic rod; 8053-Second hinge; 806-Linkage roller; 807-Fourth gear. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] like Figure 1 , Figure 2 , Figure 3As shown: A wind turbine active wind-following structure includes a nacelle 1, a support shaft 5, a heat dissipation assembly 7, and a wind-following transmission assembly 8; the support shaft 5 passes through the bottom of the nacelle 1 and is rotatably connected to the nacelle 1; the portion of the support shaft 5 located outside the nacelle 1 is fixedly connected to the tower, thereby supporting the entire nacelle 1 on the tower, and the portion of the support shaft 5 located inside the nacelle 1 is fixedly connected to a first gear 501; the heat dissipation assembly 7 and the wind-following transmission assembly 8 are installed inside the nacelle 1, the position of the heat dissipation assembly 7 is fixed, and the wind-following transmission assembly 8 includes a clutch mechanism, which can control the engagement or disengagement of the wind-following transmission assembly 8 with the heat dissipation assembly 7 and the first gear 501, thereby connecting or disconnecting the torque transmission between the heat dissipation assembly 7 and the first gear 501.

[0026] like Figure 4 , Figure 5 , Figure 7 , Figure 8 As shown: The heat dissipation assembly 7 includes a drive motor 701 and a motor frame 702; the motor frame 702 is fixed to the inner wall of the engine compartment 1, the housing of the drive motor 701 is mounted on the motor frame 702, and a second gear 704, a drive roller 705, and a fan blade 706 are sequentially fixedly connected from top to bottom on the drive shaft 703 of the drive motor 701. A heat dissipation vent 101 is provided on the engine compartment 1 below the fan blade 706 for air circulation.

[0027] The fan blade 706 is covered with a protective ring 707 to prevent the rapidly rotating fan blade 706 from hitting other wiring harnesses. The protective ring 707 is fixed to the inner wall of the cabin 1.

[0028] The air-driven transmission assembly 8 includes a linkage shaft 803, on which a third gear 804 capable of meshing with a second gear 704, a linkage roller 806 capable of rolling contact with a drive roller 705, and a fourth gear 807 capable of meshing with a first gear 501 are fixedly connected. The linkage shaft 803 is rotatably mounted on a clutch mechanism. The air-driven transmission assembly 8 and the heat dissipation assembly 7 form a double-acting transmission structure through the meshing of the third gear 804 and the second gear 704, and the rolling contact between the linkage roller 806 and the drive roller 705, ensuring stable torque transmission.

[0029] The clutch mechanism includes a lug seat 801, a swing arm 802, and a push-pull unit 805. The lug seat 801 is fixed to the inner wall of the cabin 1. One end of the swing arm 802 is hinged to the lug seat 801, and the other end is hinged to the moving end of the push-pull unit 805. The connecting end of the push-pull unit 805 is hinged to the inner wall of the cabin 1. The swing arm 802 has a corner, and the linkage shaft 803 is rotatably installed at the corner of the swing arm 802.

[0030] like Figure 6As shown: The push-pull unit 805 includes an electric telescopic rod 8052. One end of the electric telescopic rod 8052 is provided with a first hinge 8051, and the other end of the electric telescopic rod 8052 is provided with a second hinge 8053. The first hinge 8051 is connected to the cabin 1, and the second hinge 8053 is connected to the swing arm 802.

[0031] The cabin 1 is also equipped with a wind vane 2 and an anemometer 3. The cabin 1 is also equipped with a controller 4. The controller 4 is used to determine whether to start active wind countermeasures based on the information from the wind vane 2 and the anemometer 3. The controller 4 controls the push-pull unit 805 to move.

[0032] A shaft brake 6 is also installed inside the nacelle 1. The shaft brake 6 is connected to the support shaft 5. The shaft brake 6 can lock the support shaft 5 when the wind transmission component 8 is in a disengaged state, preventing the nacelle 1 from swinging randomly (the cooperation structure between the shaft brake 6 and the support shaft 5 is the existing structure inside the nacelle 1).

[0033] This invention achieves multiple functions by integrating heat dissipation drive and active airflow drive. In normal operation, the drive motor 701 continuously rotates, driving the second gear 704, drive roller 705, and fan blade 706 to rotate via the drive shaft 703. The airflow generated by the fan blade 706 carries away heat from the interior of the nacelle 1 through the heat dissipation vent 101, achieving continuous heat dissipation. At this time, the airflow transmission assembly 8 is in a disengaged state; the third gear 804 on the linkage shaft 803 disengages from the second gear 704, the linkage roller 806 disengages from the drive roller 705, and the fourth gear 807 disengages from the first gear 501. Therefore, the power of the drive motor 701 is only used for heat dissipation.

[0034] When the wind direction changes and the orientation of the nacelle 1 needs to be adjusted, the controller 4 determines that active wind countermeasures need to be initiated based on the information from the wind vane 2 and the anemometer 3. The controller 4 controls the push-pull unit 805 to move, pushing the swing arm 802 to swing around the hinge point of the lug 801, which in turn moves the linkage shaft 803, causing the third gear 804 to mesh with the second gear 704, the linkage roller 806 to roll into contact with the drive roller 705, and the fourth gear 807 to mesh with the first gear 501. At this time, the power of the drive motor 701 is transmitted to the linkage shaft 803 through the second gear 704 and the third gear 804, and the drive roller 705 and the linkage roller 806. The linkage shaft 803 then transmits torque to the first gear 501 through the fourth gear 807. The first gear 501 has a tendency to drive the support shaft 5 to rotate. Since the support shaft 5 is fixedly connected to the tower, the reaction force causes the nacelle 1 to rotate around the support shaft 5, thus achieving yaw wind countermeasures for the nacelle 1. After the airflow is completed, the controller 4 controls the push-pull unit 805 to reset, so that the airflow transmission component 8 is separated from the heat dissipation component 7 and the first gear 501, and the system returns to the heat dissipation mode only.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine active yawing structure, characterized in that: The utility model provides a wind turbine cooling device, including cabin (1), support shaft (5), heat dissipation subassembly (7) and wind transmission subassembly (8), support shaft (5) passes through the bottom of cabin (1) and is rotatably connected with cabin (1), the part of support shaft (5) outside cabin (1) is fixedly connected with tower pole, the part of support shaft (5) in cabin (1) is fixedly connected with first gear (501), heat dissipation subassembly (7) and wind transmission subassembly (8) are installed in cabin (1), the position of heat dissipation subassembly (7) is fixed, wind transmission subassembly (8) includes clutch mechanism, clutch mechanism can control wind transmission subassembly (8) and heat dissipation subassembly (7) and first gear (501) are engaged or separated, and then connect or disconnect the torque transmission between heat dissipation subassembly (7) and first gear (501).

2. A wind driven generator active yawing structure according to claim 1, characterized in that: The heat dissipation subassembly (7) includes a drive motor (701) and a motor bracket (702), the motor bracket (702) is fixed to the inner wall of the cabin (1), the housing of the drive motor (701) is mounted on the motor bracket (702), and a second gear (704), a drive roller (705) and a fan blade (706) are sequentially fixed to the drive shaft (703) of the drive motor (701) from top to bottom.

3. A wind driven generator active yawing structure according to claim 2, characterized in that: The wind transmission subassembly (8) includes a linkage shaft (803), the linkage shaft (803) is fixedly connected with a third gear (804) capable of meshing with the second gear (704), a linkage roller (806) capable of rolling contact with the drive roller (705), and a fourth gear (807) capable of meshing with the first gear (501), and the linkage shaft (803) is rotatably mounted on the clutch mechanism.

4. A wind driven generator active yawing structure according to claim 3, characterized in that: The clutch mechanism includes an ear seat (801), a swing arm (802) and a push-pull unit (805), one end of the swing arm (802) is hingedly connected to the ear seat (801), the other end is hingedly connected to the moving end of the push-pull unit (805), the connecting end of the push-pull unit (805) is hingedly connected to the inner wall of the cabin (1), the swing arm (802) has a corner, and the linkage shaft (803) is rotatably mounted at the corner of the swing arm (802).

5. A wind driven generator active yawing structure according to claim 2, characterized in that: The cabin (1) is provided with a heat dissipation opening (101) below the fan blade (706).

6. A wind driven generator active yawing structure according to claim 2, characterized in that: The fan blade (706) is sleeved with a guard ring (707), and the guard ring (707) is fixed to the inner wall of the cabin (1).

7. A wind driven generator active yawing structure according to claim 4, characterized in that: The push-pull unit (805) includes an electric telescopic rod (8052), one end of the electric telescopic rod (8052) is provided with a first hinged piece (8051), and the other end of the electric telescopic rod (8052) is provided with a second hinged piece (8053).

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