Steering mechanism of wind driven generator

Abstract

The invention relates to the technical field of wind power generation, and discloses a wind driven generator steering mechanism which comprises a main tower body and a cabin, the cabin is rotationally arranged at the top of the main tower body, a supporting beam is arranged in the cabin and sleeved with a supporting cylinder, and a hydraulic motor for driving the cabin to rotate is arranged in the middle of the cabin. The device is characterized in that an air inlet cone is arranged at the tail end of the supporting beam, air inlets are formed in the two sides of the air inlet cone, airflow channels are formed in the two sides of the supporting cylinder, a cover plate capable of overturning up and down is hinged to the communicating position of the air inlets and the airflow channels, an equipment cabin is arranged in the center in the supporting cylinder, and a reversing rotary valve and a linkage assembly for connecting the cover plate and the reversing rotary valve are arranged in the equipment cabin. Compared with the prior art, the device has the advantages that the device is not influenced by eddy current generated by fan blades of a generator, the judgment on the wind direction is more accurate, sensors such as a wind indicator and an encoder are omitted, electronic faults caused by the high-humidity and high-salt environment on the sea are avoided, and mechanical linkage signal transmission and feedback delay are lower.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and specifically refers to a steering mechanism for a wind turbine generator. Background Art

[0002] The steering mechanism of a wind turbine generator, usually called a yaw system, is a core component to ensure that the wind turbine always aligns with the wind direction to maximize power generation efficiency. Existing yaw systems include a yaw motor and a drive device, a bearing, a brake, a wind direction sensor and a control system. Sensors such as a wind vane and an encoder required for the wind direction sensor and the control system are usually installed above the tail of the outer shell of the generator nacelle to sense the wind direction. However, during the operation of the generator, since its fan blades need to rotate, the moving fan blades will generate eddy currents behind their movement trajectories. After the eddy currents are superimposed with the airflow pushing the fan blades, they will deflect towards the tail of the generator, interfering with the perception of the wind direction sensor and making the wind direction perception of the generator inaccurate.

[0003] Moreover, each control system including the wind direction sensor requires electronic components to operate. When the generator performs a yaw action, it relies on the PID algorithm of the control system to prevent oscillation and suppress overshoot. In order to ensure that the yaw turn is smooth enough, this control method has a certain inhibition on the response speed of the system, and it is difficult to quickly start yaw when the wind direction changes.

[0004] For offshore wind power, the climate environment in this scenario is relatively harsh, and it may encounter high humidity and high salinity. The lifespan of electronic components operating under such conditions is difficult to guarantee. If the electronic components are damaged prematurely, the yaw system cannot work properly, resulting in low power generation efficiency. In addition, the braking device will also rust prematurely in a high humidity and high salinity environment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing steering mechanism of a wind turbine generator has inaccurate wind direction perception, slow response speed, and is difficult to adapt to the high humidity and high salinity environment of offshore power generation. The present invention provides a steering mechanism for a wind turbine generator.

[0006] To solve the above technical problems, the technical solution provided by the present invention is: a steering mechanism for a wind turbine generator, which includes a main tower body and a nacelle. The nacelle is rotatably arranged on the top of the main tower body. A support beam is arranged inside the nacelle, and a support cylinder is sleeved on the support beam. A hydraulic motor for driving the nacelle to rotate is arranged in the middle of the nacelle, and a hydraulic pump station for driving the hydraulic motor is arranged at the tail of the nacelle.

[0007] An air inlet cone is arranged at the end of the support beam, air inlets are arranged on both sides of the air inlet cone, air flow channels are arranged on both sides of the support cylinder, and a cover plate that can be turned up and down is hinged at the connection between the air inlet and the air flow channel. A device cabin is arranged in the center of the support cylinder, and a reversing valve and a linkage component for connecting the cover plate and the reversing valve are arranged in the device cabin.

[0008] Further, the reversing rotary valve includes a valve body, a vertical guide ring, and a valve core. The vertical guide ring is fixedly sleeved inside the valve body, and the valve core is rotatably sleeved inside the vertical guide ring. The inside of the valve body has a multi-layer structure, and each layer is provided with a horizontal guide ring. The inner ring of the horizontal guide ring is provided with a diversion hole. A plurality of interfaces are distributed up and down on the outer side of the valve body, namely: an oil pump interface, an oil tank interface, a first motor interface, and a second motor interface. The above interfaces are respectively communicated with each layer of the horizontal guide ring.

[0009] Further, the oil pump interface is communicated with the hose at the pump outlet of the hydraulic pump station, the oil tank interface is communicated with the oil tank inlet of the hydraulic pump station, and the first motor interface and the second motor interface are respectively communicated with the hose at both ends of the hydraulic motor.

[0010] Further, a plurality of vertical rectangular grooves are provided around the vertical guide ring to connect the inner ring and the outer ring of the vertical guide ring. Among them, there are an oil pump diversion groove and an oil tank diversion groove arranged opposite to each other, and a first motor diversion groove and a second motor diversion groove closely arranged on both sides of the oil pump diversion groove. Among the plurality of horizontal guide rings, the diversion holes in the layer connected to the oil pump interface are communicated with the oil pump diversion groove, the diversion holes in the layer connected to the oil tank interface are communicated with the oil tank diversion groove, the diversion holes in the layer connected to the first motor interface are communicated with the first motor diversion groove, and the diversion holes in the layer connected to the second motor interface are communicated with the second motor diversion groove.

[0011] Further, the valve core includes a pressure supply channel, a pressure relief channel, and a return channel. The valve core has a multi-layer structure. Among them, the pressure supply channel and the pressure relief channel are in the same layer, and the return channel is in a separate layer. A connection cavity is provided between the pressure supply channel and the pressure relief channel. The opening width of the pressure supply channel just connects the oil pump diversion groove with the first motor diversion groove or the second motor diversion groove. The opening width of the return channel just connects the oil tank diversion groove with the first motor diversion groove or the second motor diversion groove. The opening width of the pressure relief channel is equal to the width of the oil tank diversion groove.

[0012] Further, a guide rod is provided in the middle of the equipment cabin. A slider is slidably arranged on the guide rod. The reversing rotary valve is arranged below the slider. The slider is rotatably connected with a lever. The center of the lever is rotatably connected with the valve core coaxially. Push rods are slidably arranged on both sides of the equipment cabin. The push rods move between the equipment cabin above the air flow channel. The two ends of the push rods are respectively hinged with a first connecting rod and a second connecting rod. The end of the first connecting rod is hinged with the cover plate, and the second connecting rod is hinged with the outer end of the lever.

[0013] Further, the engine room is provided with a bearing rotatably connected to the top of the main tower body. A gearbox is provided below the bearing. The hydraulic motor is installed near the bearing on the support beam. A gear ring and a gear that mesh with each other are provided in the gearbox. Among them, the gear ring is power-connected to the top of the main tower body, and the gear is power-connected to the output shaft of the hydraulic motor.

[0014] Further, the air inlet is arranged in a convergent shape from outside to inside. The end of the air flow channel extends into the cabin interior and is connected to a discharge pipe. The end of the discharge pipe passes through the cabin housing and is connected to the outside.

[0015] Further, a cylindrical rotating shaft is rotatably sleeved outside the support cylinder. The cylindrical rotating shaft is provided with a plurality of fan blades. A rotating shaft cover is rotatably sleeved outside the cylindrical rotating shaft. An equipment platform is arranged at the tail of the cabin. A generator set is arranged on the equipment platform. The cylindrical rotating shaft is power-connected to the generator set.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The hydraulic valve core is directly driven by the air flow pressure difference between the air inlet cone and the cover plate, eliminating sensors such as wind vanes and encoders, and avoiding electronic failures caused by the high humidity and high salt environment at sea.

[0018] The mechanical linkage transmits signals, and the mechanical feedback delay is lower, enabling it to align with the wind direction faster.

[0019] The air intake of the air inlet cone is not affected by the eddy current generated by the generator fan blades, and the judgment of the wind direction is more accurate.

[0020] When the cabin is close to being directly facing the wind direction, the air flow difference on both sides of the air inlet cone automatically decreases, the valve core is reset through the linkage component, and physical anti-overadjustment is achieved through its own structure.

[0021] When the valve core is in the middle position, the circuit of the hydraulic motor can be closed. When the cabin is aligned with the wind direction, the motor stops rotating and the cabin is locked, without the need for an additional braking structure. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention.

[0023] Figure 2 is a schematic structural diagram of the rotating shaft cover of the present invention.

[0024] Figure 3 is a schematic structural diagram of the cylindrical rotating shaft of the present invention.

[0025] Figure 4 is a schematic internal structure diagram of the cabin of the present invention.

[0026] Figure 5 is a schematic structural diagram of the gearbox of the present invention.

[0027] Figure 6 is the appendix Figure 5 Schematic diagram at position a.

[0028] Figure 7 is a schematic structural diagram of the air inlet of the present invention.

[0029] Figure 8 is a schematic internal structure diagram of the equipment cabin of the present invention.

[0030] Figure 9 It is a schematic structural diagram of the commutation rotary valve of the present invention.

[0031] Figure 10 It is an attachment Figure 9 Schematic diagram at position b in the figure.

[0032] Figure 11 It is a schematic diagram of the air flow distribution of the intake cone of the present invention.

[0033] Figure 12 It is an exploded structural schematic diagram of the commutation rotary valve of the present invention.

[0034] Figure 13 It is a schematic cross-sectional view of the commutation rotary valve of the present invention at the second motor interface.

[0035] Figure 14 It is a schematic cross-sectional view of the commutation rotary valve of the present invention at the oil tank interface.

[0036] Figure 15 It is a schematic cross-sectional view of the commutation rotary valve of the present invention at the oil pump interface.

[0037] Figure 16 It is a schematic cross-sectional view of the commutation rotary valve of the present invention at the first motor interface.

[0038] As shown in the figure: 1. Main tower body, 2. Machine cabin, 3. Rotating shaft cover, 4. Fan blade, 5. Intake cone, 6. Cylindrical rotating shaft, 7. Support beam, 8. Support cylinder, 9. Equipment platform, 10. Bearing, 11. Intake port, 12. Air flow channel, 13. Hydraulic pump station, 14. Generator set, 15. Hydraulic motor, 16. Gearbox, 17. Tooth ring, 18. Gear, 19. Equipment cabin, 20. Cover plate, 21. Push rod, 22. First connecting rod, 23. Guide rod, 24. Slide block, 25. Lever, 26. Second connecting rod, 27. Commutation rotary valve, 28. Valve body, 29. Vertical flow guide ring, 30. Valve core, 31. Oil pump flow guide groove, 32. First motor flow guide groove, 33. Second motor flow guide groove, 34. Oil tank flow guide groove, 35. Oil pump interface, 36. Oil tank interface, 37. First motor interface, 38. Second motor interface, 39. Horizontal flow guide ring, 40. Flow guide hole, 41. Connection cavity, 42. Pressure supply channel, 43. Pressure relief channel, 44. Return channel, 45. Exhaust pipe. Specific embodiments

[0039] The present invention will be further described in detail below with reference to the accompanying drawings.

[0040] Combined with the attached Figure 1 、attached Figure 2 、attached Figure 3 and attached Figure 4, A steering mechanism for a wind turbine, which comprises a main tower body 1 and a nacelle 2. The nacelle 2 is rotatably arranged at the top of the main tower body 1. A support beam 7 is arranged inside the nacelle 2, and the support beam 7 sleeves a support cylinder 8. A hydraulic motor 15 for driving the nacelle 2 to rotate is arranged in the middle of the nacelle 2, and a hydraulic pump station 13 for driving the hydraulic motor 15 is arranged at the tail of the nacelle 2. A cylindrical rotating shaft 6 is rotatably sleeved outside the support cylinder 8, and a plurality of fan blades 4 are arranged on the cylindrical rotating shaft 6. A rotating shaft cover 3 is rotatably sleeved outside the cylindrical rotating shaft 6. An equipment platform 9 is arranged at the tail of the nacelle 2, and a generator set 14 is arranged on the equipment platform 9. The cylindrical rotating shaft 6 is power-connected to the generator set 14.

[0041] Combined with the attached Figure 3 , attached Figure 5 and attached Figure 6 , The nacelle 2 is provided with a bearing 10 rotatably connected to the top of the main tower body 1. A gearbox 16 is arranged below the bearing 10. The hydraulic motor 15 is installed near the bearing 10 on the support beam 7. A toothed ring 17 and a gear 18 that mesh with each other are arranged in the gearbox 16, wherein the toothed ring 17 is power-connected to the top of the main tower body 1, and the gear 18 is power-connected to the output shaft of the hydraulic motor 15.

[0042] Combined with the attached Figure 3 , attached Figure 4 , attached Figure 7 , attached Figure 9 and attached Figure 10 , An air inlet cone 5 is arranged at the end of the support beam 7. Air inlets 11 are arranged on both sides of the air inlet cone 5. Air flow channels 12 are arranged on both sides of the support cylinder 8. A cover plate 20 that can be turned up and down is hinged at the connection between the air inlet 11 and the air flow channel 12. An equipment cabin 19 is arranged in the center of the support cylinder 8. A reversing valve 27 and a linkage assembly connecting the cover plate 20 and the reversing valve 27 are arranged in the equipment cabin 19. The air inlet 11 is arranged in a converging shape from outside to inside. The end of the air flow channel 12 extends into the nacelle 2 and is connected to an exhaust pipe 45. The end of the exhaust pipe 45 passes through the shell of the nacelle 2 and is connected to the outside.

[0043] Combined with the attached Figure 12 and attached Figure 13 , The reversing valve 27 comprises a valve body 28, a vertical guide ring 29 and a valve core 30. The vertical guide ring 29 is fixedly sleeved inside the valve body 28, and the valve core 30 is rotatably sleeved inside the vertical guide ring 29. The inside of the valve body 28 is a multi-layer structure, and each layer is provided with a horizontal guide ring 39. A guide hole 40 is arranged in the inner ring of the horizontal guide ring 39. A plurality of interfaces are arranged on the upper and lower distribution of the outside of the valve body 28, which are respectively: an oil pump interface 35, an oil tank interface 36, a first motor interface 37 and a second motor interface 38. The above interfaces are respectively communicated with each layer of the horizontal guide ring 39.

[0044] Combined with the attached Figure 12 , attached Figure 13 , attached Figure 14 , attachedFigure 15 and the attached Figure 16 , a plurality of vertical rectangular grooves are arranged around the vertical diversion ring 29 to connect the inner ring and the outer ring of the vertical diversion ring 29, among which there are an oil pump diversion groove 31 and an oil tank diversion groove 34 arranged opposite to each other, and a first motor diversion groove 32 and a second motor diversion groove 33 closely adjacent to both sides of the oil pump diversion groove 31. Among the plurality of horizontal diversion rings 39, the diversion holes 40 in the layer connected to the oil pump interface 35 are communicated with the oil pump diversion groove 31, the diversion holes 40 in the layer connected to the oil tank interface 36 are communicated with the oil tank diversion groove 34, the diversion holes 40 in the layer connected to the first motor interface 37 are communicated with the first motor diversion groove 32, and the diversion holes 40 in the layer connected to the second motor interface 38 are communicated with the second motor diversion groove 33.

[0045] The oil pump interface 35 is communicated with the pump outlet hose of the hydraulic pump station 13, the oil tank interface 36 is communicated with the oil tank inlet of the hydraulic pump station 13, the first motor interface 37 and the second motor interface 38 are respectively communicated with the hose at both ends of the hydraulic motor 15, and an opening extending into the engine room 2 is provided to facilitate the arrangement of the above hydraulic hoses.

[0046] Combined with the attached Figure 13 , the attached Figure 14 , the attached Figure 15 and the attached Figure 16 , the spool 30 includes a pressure supply channel 42, a pressure relief channel 43 and a return channel 44. The spool 30 has a multi-layer structure, among which the pressure supply channel 42 and the pressure relief channel 43 are in the same layer, the return channel 44 is in a separate layer, a connection cavity 41 is arranged between the pressure supply channel 42 and the pressure relief channel 43. The opening width of the pressure supply channel 42 just connects the oil pump diversion groove 31 with the first motor diversion groove 32 or the second motor diversion groove 33, the opening width of the return channel 44 just connects the oil tank diversion groove 34 with the first motor diversion groove 32 or the second motor diversion groove 33, and the opening width of the pressure relief channel 43 is equal to the width of the oil tank diversion groove 34.

[0047] Combined with the attached Figure 13 , the attached Figure 14 , the attached Figure 15 and the attached Figure 16 , taking the direction in the attached Figure 13 as a reference, the spool 30 in the attached Figure 13 is in the neutral state. In this state, the pressure supply channel 42 is only communicated with the oil pump diversion groove 31, the pressure relief channel 43 and the return channel 44 are communicated with the oil tank diversion groove 34, and the first motor diversion groove 32 or the second motor diversion groove 33 is closed. The spool 30 rotates clockwise until the pressure supply channel 42 connects the oil pump diversion groove 31 with the first motor diversion groove 32. In this state, it is used as the right yaw valve position. The spool 30 rotates counterclockwise until the pressure supply channel 42 connects the oil pump diversion groove 31 with the second motor diversion groove 33. In this state, it is used as the left yaw valve position.

[0048] When in the middle position, the hydraulic oil output by the hydraulic pump station 13 enters the corresponding horizontal diversion ring 39 through the oil pump interface 35, and then enters the pressure supply channel 42 through the diversion hole 40. Since the connection cavity 41 connects the pressure supply channel 42 with the pressure relief channel 43, the hydraulic oil immediately enters the oil tank diversion groove 34 through the pressure relief channel 43. During the vertical flow of the hydraulic oil in the oil tank diversion groove 34, only at the Figure 14 position where the oil tank diversion groove 34 shown in the figure is connected to the diversion hole 40, so the hydraulic oil only enters the horizontal diversion ring 39 at this position and returns to the oil tank of the hydraulic pump station 13 through the oil tank interface 36. Both the first motor diversion groove 32 and the second motor diversion groove 33 are closed by the valve core 30. To sum up, when the reversing rotary valve 27 is in the middle position, the hydraulic pump station 13 performs self-circulation, and the pipeline connected to the hydraulic motor 15 is closed by the valve core 30, and the hydraulic motor 15 cannot rotate.

[0049] When in the right yaw valve position, through the Figure 15 it can be seen that when the pressure relief channel 43 at the position shown in the figure rotates clockwise to the right yaw valve position, it is closed by the vertical diversion ring 29. Through the Figure 14 it can be seen that after the return channel 44 at the position shown in the figure rotates clockwise, it connects the second motor diversion groove 33, the oil tank diversion groove 34 and the diversion hole 40. The hydraulic oil output by the hydraulic pump station 13 enters the corresponding horizontal diversion ring 39 through the oil pump interface 35, and then enters the pressure supply channel 42 through the diversion hole 40. The hydraulic oil enters the first motor diversion groove 32 and flows to the Figure 16 position shown in the figure, enters the horizontal diversion ring 39 here through the diversion hole 40, and then flows from the first motor interface 37 to the hydraulic motor 15 to drive its rotation. After the hydraulic oil leaves the hydraulic motor 15, it enters the horizontal diversion ring 39 at the Figure 13 position shown in the figure through the second motor interface 38. After the valve core 30 rotates clockwise here, the second motor diversion groove 33 is closed, and the hydraulic oil entering the second motor diversion groove 33 can only flow vertically to the Figure 14 position shown in the figure and enters the horizontal diversion ring 39 here through the diversion hole 40 and the oil tank diversion groove 34, and then returns to the oil tank of the hydraulic pump station 13 through the oil tank interface 36 to complete the cycle.

[0050] When in the middle position between the middle position and the right yaw valve position, through the Figure 15 it can be seen that after the valve core 30 rotates clockwise at a small angle at the position shown in the figure, the pressure supply channel 42 is completely connected to the oil pump diversion groove 31 and is not completely connected to the first motor diversion groove 32. At the same time, the pressure relief channel 43 is not completely connected to the oil tank diversion groove 34. Through the Figure 14It can be seen that after the spool 30 rotates clockwise at a small angle at the position shown in the figure, the return channel 44 is completely connected to the oil tank diversion groove 34 and is not completely connected to the second motor diversion groove 33. To sum up, when in the middle position between the middle position and the right yaw valve position, the flow direction of the hydraulic oil in the reversing rotary valve 27 is roughly the same as that in the right yaw valve position, but part of the hydraulic oil output by the hydraulic pump station 13 will not be delivered to the hydraulic motor 15 but return to the oil tank of the hydraulic pump station 13 for self-circulation, and the flow distribution ratio between driving the hydraulic motor 15 and self-circulation of the hydraulic oil is related to the clockwise rotation angle of the spool 30. The larger the clockwise rotation angle of the spool 30, the larger the flow rate for driving the hydraulic motor 15. Therefore, the larger the clockwise rotation angle of the spool 30, the greater the power obtained by the hydraulic motor 15.

[0051] When in the left yaw valve position or in the middle position between the middle position and the left yaw valve position, the spool 30 rotates counterclockwise. The principle of the hydraulic oil flow in the reversing rotary valve 27 is the same as the state of the above-mentioned clockwise rotation of the spool 30, only the order of the hydraulic oil flowing through the first motor diversion groove 32 and the second motor diversion groove 33 is opposite, and the present application will not be further described.

[0052] To sum up, the present application can rotate the spool 30 to drive the entire cabin 2 to perform yaw steering by the hydraulic motor 15, and the larger the rotation angle of the spool 30, the faster the yaw steering speed of the cabin 2.

[0053] In the specific implementation of the present invention, the hose connection should be selected according to the characteristics of the actually selected hydraulic motor 15 to ensure that the cabin 2 rotates to the left when the reversing rotary valve 27 is in the left yaw valve position, and the cabin 2 rotates to the right when the reversing rotary valve 27 is in the right yaw valve position.

[0054] Combined with the attached Figure 8 , a guide rod 23 is provided in the middle of the equipment cabin 19. A slider 24 is slidably provided on the guide rod 23. The reversing rotary valve 27 is provided below the slider 24. The slider 24 is rotatably connected to a lever 25. The center of the lever 25 is rotatably connected to the spool 30 coaxially. Push rods 21 are slidably provided on both sides of the equipment cabin 19. The push rods 21 move between the equipment cabin 19 above the air flow channel 12. The two ends of the push rods 21 are respectively hinged to a first connecting rod 22 and a second connecting rod 26. The end of the first connecting rod 22 is hinged to the cover plate 20. The second connecting rod 26 is hinged to the outer end of the lever 25.

[0055] When the external air flow enters the air inlet 11, it will blow the cover plate 20 to turn up by a certain angle, and the greater the wind speed, the greater the angle of the cover plate 20 turning up. The upward turning of the cover plate 20 drives the push rod 21 to move to the left in the direction shown in the attached Figure 8 figure through the first connecting rod 22, and the push rod 21 drives the lever 25 to move through the second connecting rod 26.

[0056] Since the linkage mechanisms are symmetrically arranged on both sides of the device, when the flipping angles of the cover plates 20 on both sides caused by the airflow are the same, the two ends of the lever 25 are pushed by the same distance, and the lever 25 itself will not rotate around its own center.

[0057] Combined with the attached Figure 11 , where the arrow indicates the airflow direction. Taking the airflow direction in the figure as the standard, it can be seen that the device is biased to the right relative to the airflow direction. In this state, more airflow will enter the air inlet 11 on the left side of the intake cone 5. Since the air inlet 11 on the left side of the intake cone 5 obtains a higher airflow rate, the internal airflow velocity is higher, and the cover plate 20 on the left side of the device is pushed upward by the airflow to a greater flipping angle, resulting in different distances by which the two ends of the lever 25 are pushed. The left side of the lever 25 is pushed farther. In this state, the lever 25 rotates counterclockwise, thereby driving the spool 30 to rotate counterclockwise in the reversing valve 27 to the left yaw valve position or the intermediate position between the middle position and the left yaw valve position. At this time, the hydraulic oil flow direction causes the hydraulic motor 15 to drive the engine compartment 2 to yaw to the left as a whole.

[0058] When the device is biased to the left relative to the airflow direction, the airflow magnitudes in the air inlets 11 on both sides of the intake cone 5 are opposite to those when it is biased to the right. The above-mentioned linkage mechanism causes the spool 30 to rotate clockwise in the reversing valve 27, and the hydraulic motor 15 drives the engine compartment 2 to yaw to the right as a whole.

[0059] During the yaw rotation of the device, the included angle between the intake cone 5 and the airflow direction will gradually decrease. Therefore, during this process, the difference in the airflow magnitudes in the air inlets 11 on both sides of the intake cone 5 will continuously decrease, and the flipping angles of the cover plates 20 on both sides caused by the airflow will continuously approach the same. The lever 25 will continuously approach the equilibrium position, causing the spool 30 to gradually rotate to the middle position. Combining the characteristic that the smaller the rotation angle of the spool 30, the slower the yaw turning speed of the engine compartment 2, it can be seen that during the yaw rotation of the device, the rotation speed of the engine compartment 2 will continuously decrease and stop rotating automatically when aligned with the airflow direction, showing the characteristic of negative feedback regulation.

[0060] The above describes the present invention and its implementation manners. This description is not restrictive, and the actual structure is not limited thereto. In summary, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A wind turbine steering mechanism, comprising a main tower (1) and a nacelle (2), wherein the nacelle (2) is rotatably arranged on the top of the main tower (1), a support beam (7) is arranged inside the nacelle (2), a support cylinder (8) is sleeved on the support beam (7), a hydraulic motor (15) for driving the nacelle (2) to rotate is arranged in the middle of the nacelle (2), and a hydraulic pump station (13) for driving the hydraulic motor (15) is arranged at the rear of the nacelle (2), characterized in that: An air intake cone (5) is arranged at the end of the support beam (7), air intake ports (11) are arranged on both sides of the air intake cone (5), air flow channels (12) are arranged on both sides of the support tube (8), a cover plate (20) that can be flipped up and down is hingedly arranged at the connection point between the air intake port (11) and the air flow channel (12), an equipment cabin (19) is arranged in the center of the support tube (8), a reversing rotary valve (27) and a linkage assembly that connects the cover plate (20) and the reversing rotary valve (27) are arranged in the equipment cabin (19), the cover plates (20) on both sides flip up and down with different amplitudes, and the connection direction of the oil path in the reversing rotary valve (27) is changed through the linkage assembly, and the connection direction of the oil path in the reversing rotary valve (27) controls the rotation direction and speed of the hydraulic motor (15), thereby adjusting the direction of the engine room (2) according to the wind direction.

2. The wind turbine generator steering mechanism according to claim 1, characterized in that: The reversing rotary valve (27) comprises a valve body (28), a vertical guide ring (29) and a valve core (30), wherein the vertical guide ring (29) is fixedly sleeved inside the valve body (28), and the valve core (30) is rotatably sleeved inside the vertical guide ring (29). The interior of the valve body (28) is a multi-layer structure, each layer is provided with a horizontal guide ring (39), and the inner ring of the horizontal guide ring (39) is provided with a guide hole (40). A plurality of interfaces are arranged on the outer side of the valve body (28) in upper and lower distributions, namely: an oil pump interface (35), an oil tank interface (36), a first motor interface (37) and a second motor interface (38), and the above interfaces are respectively connected to the horizontal guide rings (39) of each layer.

3. The wind turbine generator steering mechanism according to claim 2, characterized in that: The oil pump interface (35) is in communication with a pump outlet hose of the hydraulic pump station (13), the oil tank interface (36) is in communication with an oil tank inlet of the hydraulic pump station (13), and the first motor interface (37) and the second motor interface (38) are in communication with interface hoses at both ends of the hydraulic motor (15), respectively.

4. The wind turbine generator steering mechanism according to claim 3, characterized in that: The vertical guide ring (29) is provided with a plurality of vertical rectangular grooves around its periphery to connect the inner ring and the outer ring of the vertical guide ring (29), wherein the guide grooves include an oil pump guide groove (31) and an oil tank guide groove (34) arranged opposite to each other, and a first motor guide groove (32) and a second motor guide groove (33) close to both sides of the oil pump guide groove (31). In the plurality of horizontal guide rings (39), the guide holes (40) in a layer connected to the oil pump interface (35) are connected to the oil pump guide groove (31), the guide holes (40) in a layer connected to the oil tank interface (36) are connected to the oil tank guide groove (34), the guide holes (40) in a layer connected to the first motor interface (37) are connected to the first motor guide groove (32), and the guide holes (40) in a layer connected to the second motor interface (38) are connected to the second motor guide groove (33).

5. The wind turbine generator steering mechanism according to claim 4, characterized in that: The valve core (30) comprises a pressure supply channel (42), a pressure relief channel (43) and a return channel (44). The valve core (30) has a multi-layer structure, wherein the pressure supply channel (42) and the pressure relief channel (43) are located in the same layer, and the return channel (44) is located in a separate layer. A connecting chamber (41) is provided between the pressure supply channel (42) and the pressure relief channel (43). The opening width of the pressure supply channel (42) is just enough to connect the oil pump guide groove (31) with the first motor guide groove (32) or the second motor guide groove (33). The opening width of the return channel (44) is just enough to connect the oil tank guide groove (34) with the first motor guide groove (32) or the second motor guide groove (33). The opening width of the pressure relief channel (43) is equal to the width of the oil tank guide groove (34).

6. The wind turbine generator steering mechanism according to claim 2, characterized in that: A guide rod (23) is provided in the middle of the equipment cabin (19), a slider (24) is slidably provided on the guide rod (23), a reversing valve (27) is provided below the slider (24), a lever (25) is rotatably connected to the slider (24), the center of the lever (25) is coaxially rotatably connected to the valve core (30), push rods (21) are slidably provided on both sides of the equipment cabin (19), the push rods (21) move between the equipment cabin (19) and the air flow channel (12), the two ends of the push rod (21) are respectively hingedly connected to a first connecting rod (22) and a second connecting rod (26), the end of the first connecting rod (22) is hingedly connected to the cover plate (20), and the second connecting rod (26) is hingedly connected to the outer end of the lever (25).

7. The wind turbine generator steering mechanism according to claim 1, characterized in that: The cabin (2) is provided with a bearing (10) rotatably connected to the top of the main tower body (1), a gear box (16) is provided below the bearing (10), a hydraulic motor (15) is installed on the support beam (7) near the bearing (10), and a gear ring (17) and a gear (18) meshing with each other are provided in the gear box (16), wherein the gear ring (17) is dynamically connected to the top of the main tower body (1), and the gear (18) is dynamically connected to the output shaft of the hydraulic motor (15).

8. The wind turbine generator steering mechanism according to claim 1, characterized in that: The air inlet (11) is arranged to converge from the outside to the inside, the end of the airflow channel (12) extends to the inside of the cabin (2) and is connected to an exhaust pipe (45), and the end of the exhaust pipe (45) passes through the shell of the cabin (2) and is connected to the outside.

9. The wind turbine generator steering mechanism according to claim 1, characterized in that: The support cylinder (8) is externally rotatably sleeved on a cylindrical rotating shaft (6), the cylindrical rotating shaft (6) is provided with a plurality of fan blades (4), and the cylindrical rotating shaft (6) is externally rotatably sleeved on a rotating shaft cover (3). An equipment platform (9) is provided at the rear of the cabin (2), a generator set (14) is provided on the equipment platform (9), and the cylindrical rotating shaft (6) is power-connected to the generator set (14).

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