A wind turbine and control method suitable for valleys

Abstract

The present invention discloses a wind turbine suitable for mountain valleys and a control method thereof, comprising a vertical wind rotor, a horizontal wind rotor, a tower, a rotor conversion mechanism, a nacelle and a wind speed detection device for detecting the wind speeds of the horizontal wind and the vertical wind, wherein the rotation centers of the vertical wind rotor and the horizontal wind rotor are on the same axis and the vertical wind rotor is arranged behind the horizontal wind rotor, the vertical wind rotor shaft of the vertical wind rotor and the horizontal wind rotor shaft of the horizontal wind rotor are both connected to the rotor conversion mechanism, the rotor conversion mechanism comprises a vertical wind rotor driving gear set and a horizontal wind rotor driving gear set for realizing independent or joint work of the vertical wind rotor and the horizontal wind rotor according to the wind speed detected by the wind speed detection device, the rotor conversion mechanism is connected to the nacelle, and the nacelle is fixed on the tower. The wind turbine of the present invention can not only absorb horizontal wind perpendicular to the wind rotor, but also absorb mountain valley wind, and can make maximum use of wind energy resources.

Description

Technical Field

[0001] The invention belongs to the technical field of renewable resource utilization, and in particular to a wind turbine suitable for valleys and a control method thereof. Background Art

[0002] Wind energy is a major clean and renewable energy source, and wind power generation has developed rapidly. The proportion of wind turbines in the overall energy utilization continues to increase; at the same time, wind power technology has also made significant progress, and wind turbine technologies that can adapt to various environments are constantly emerging. With the continuous development and utilization of wind resources in flat terrain, wind farms in flat terrain with rich wind resources have been basically developed, and onshore wind power has shifted the development and utilization of wind resources to complex terrain. Wind farms in mountainous terrain have attracted the attention of many developers due to their high altitudes and rich wind resources. However, most of the wind turbines installed in valleys are horizontal-axis wind turbines, so wind turbines can only absorb horizontal winds perpendicular to the wind rotors. However, due to the temperature difference between day and night, valley winds will be generated in the valley, and horizontal-axis wind turbines cannot absorb and utilize this part of energy. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a wind turbine and a control method suitable for valleys, which respectively utilizes horizontal wind from the horizontal direction and valley wind from the nearly vertical direction through a horizontal wind rotor and a vertical wind rotor, and realizes different operating states of the wind turbine through a wind rotor conversion control mechanism to achieve maximum utilization of wind energy resources.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a wind turbine suitable for mountain valleys, comprising a vertical wind rotor, a horizontal wind rotor, a tower, a rotor conversion mechanism, a nacelle and a wind speed detection device for detecting horizontal wind and vertical wind speeds, wherein the rotation centers of the vertical wind rotor and the horizontal wind rotor are on the same axis and the vertical wind rotor is arranged behind the horizontal wind rotor, the vertical wind rotor shaft of the vertical wind rotor and the horizontal wind rotor shaft of the horizontal wind wheel are both connected to the rotor conversion mechanism, the rotor conversion mechanism comprises a vertical wind rotor driving gear set and a horizontal wind rotor driving gear set for realizing independent or joint work of the vertical wind rotor and the horizontal wind rotor according to the wind speed detected by the wind speed detection device, the rotor conversion mechanism is connected to the nacelle, and the nacelle is fixed on the tower.

[0005] Furthermore, three blade support shafts are evenly distributed on the vertical wind wheel, and two vertical wind blades of different sizes and the same shape are connected in parallel on each blade support shaft, and the windward surface of the vertical shaft blade faces the vertical wind wheel shaft.

[0006] Furthermore, the horizontal wind wheel shaft is a solid shaft, and the vertical wind wheel shaft is a hollow shaft. The horizontal wind wheel shaft passes through the center of the vertical wind wheel shaft. The vertical wind wheel shaft is provided with a plurality of bearings for supporting and axially fixing the horizontal wind wheel shaft in the vertical wind wheel shaft. The wind wheel conversion mechanism is arranged in a wind wheel conversion mechanism box, and the wind wheel conversion mechanism box is provided with bearings for realizing axial fixation and circumferential relative rotation of the vertical wind wheel shaft.

[0007] Furthermore, the wind wheel conversion mechanism includes a vertical wind wheel driving gear set and a horizontal wind wheel driving gear set with the same structure, and a driven gear shaft system meshing with the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set. The vertical wind wheel driving gear set is arranged in front of the horizontal wind wheel driving gear set. The vertical wind wheel driving gear set and the horizontal wind wheel driving gear set are respectively connected to the vertical wind wheel shaft and the horizontal wind wheel shaft through splines, and the end of the driven gear shaft system away from the wind wheel is connected to the cabin.

[0008] Furthermore, the driven gear shaft system includes a driven gear shaft, on which a vertical axis driven gear and a horizontal axis driven gear are fixedly sleeved, the vertical axis driven gear and the horizontal axis driven gear are respectively meshed with the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set, a gear box is arranged in the cabin, and a gear box input shaft of the gear box extends out of the cabin and is connected to the driven gear shaft.

[0009] Further, the structure of the horizontal wind wheel drive gear set is taken as an example for specific description: the horizontal wind wheel drive gear set includes a horizontal axis conversion wheel, a horizontal axis conversion wheel drive gear, a horizontal axis conversion wheel control ring and a horizontal axis hydraulic device, the horizontal axis conversion wheel drive gear is fixed on the horizontal wind wheel shaft at one end away from the wind wheel, the horizontal axis conversion wheel is sleeved on the horizontal wind wheel shaft and is arranged close to the horizontal axis conversion wheel drive gear, wherein:

[0010] A horizontal axis conversion wheel spline and a plurality of horizontal axis conversion wheel positioning pin holes are formed through the end surface of the horizontal axis conversion wheel, the horizontal axis conversion wheel spline is arranged at the center of the end surface of the horizontal axis conversion wheel, and the plurality of horizontal axis conversion wheel positioning pin holes are arranged around the horizontal axis conversion wheel spline and are evenly arranged;

[0011] A horizontal axis driving gear bearing and a plurality of horizontal axis driving gear locating pins are arranged on the horizontal axis conversion wheel driving gear, the horizontal axis driving gear bearing is arranged in the middle of the horizontal axis conversion wheel driving gear, a plurality of horizontal axis driving gear locating pins are evenly arranged around the horizontal axis driving gear bearing on one end surface of the horizontal axis conversion wheel driving gear, and the horizontal axis driving gear locating pins are used in conjunction with the locating pin holes on the horizontal axis conversion wheel;

[0012] One end of the horizontal axis conversion wheel control ring is arc-shaped, and the other end is provided with a connecting hole. The outer ring of the horizontal axis conversion wheel is provided with a groove, which is axially fixedly connected to the arc-shaped end of the horizontal axis conversion wheel control ring and circumferentially rotatably connected. The connecting hole of the horizontal axis conversion wheel control ring and the shaft of the horizontal axis hydraulic device are fixedly connected to each other to realize the movement of the horizontal axis conversion wheel control ring, and then push the horizontal axis conversion wheel to move axially on the horizontal wind wheel shaft so that the horizontal axis drive gear locating pin is inserted into or pulled out of the locating pin hole, thereby realizing the closing and separation of the horizontal axis conversion wheel and the horizontal axis drive gear.

[0013] Furthermore, a spline keyway is provided on one end of the horizontal wind wheel shaft away from the horizontal wind wheel, and the horizontal wind wheel shaft cooperates with the horizontal axis conversion wheel spline through the spline keyway to fix the horizontal axis conversion wheel circumferentially relative to the horizontal wind wheel shaft.

[0014] Furthermore, there is a relationship between the length L1 of the spline keyway and the shaft diameter d2 of the horizontal wind wheel shaft: L1 = (3.5-4.1) * d2.

[0015] Furthermore, there is a relationship between the pitch circle diameter D2 of the horizontal axis conversion wheel driving gear and the shaft diameter d2 of the horizontal wind wheel shaft: D2 = (3.5-4.5)*d2.

[0016] The present invention also provides a control method for a wind turbine suitable for use in a valley, which includes four working states, as follows:

[0017] 1) When the wind speed detection device detects that the horizontal wind speed is less than 3m / s and the vertical wind speed is less than 1m / s, both the vertical wind rotor and the horizontal wind rotor are not working and are in a shutdown state. Specifically, the vertical wind rotor driving gear set and the horizontal wind rotor driving gear set of the wind rotor conversion mechanism are not working;

[0018] 2) When the wind speed detection device detects that the horizontal wind speed is greater than 3m / s and the vertical wind speed is less than 1m / s, the horizontal wind rotor is in working state and the vertical wind rotor is in shutdown state. Specifically, the horizontal wind rotor drives the horizontal wind rotor driving gear of the wind rotor conversion mechanism to generate power, and the vertical wind rotor does not drive the vertical wind rotor driving gear group to generate power;

[0019] 3) When the wind speed detection device detects that the horizontal wind speed is less than 3m / s and the vertical wind speed is greater than 1m / s, the vertical wind rotor is in working state and the horizontal wind rotor is in shutdown state. Specifically, the vertical wind rotor drives the vertical wind rotor driving gear set of the wind rotor conversion mechanism to generate power, and the horizontal wind rotor does not drive the horizontal wind rotor driving gear of the wind rotor conversion mechanism to generate power;

[0020] 4) When the wind speed detection device detects that the horizontal wind speed is greater than 3m / s and the vertical wind speed is also greater than 1m / s, the vertical wind rotor and the horizontal wind rotor are both in working condition. Specifically: the vertical wind rotor drives the vertical wind rotor driving gear set of the wind rotor conversion mechanism to generate power, and the horizontal wind rotor drives the horizontal wind rotor driving gear of the wind rotor conversion mechanism to generate power.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The present invention provides a wind turbine and a control method suitable for valleys. Horizontal wind rotors and vertical wind rotors are arranged to respectively utilize horizontal wind from the horizontal direction and valley wind from a nearly vertical direction. Not only can the horizontal wind and valley wind be captured separately, but the horizontal wind and vertical wind in the valley can be captured simultaneously. In the process of capturing wind energy, the two wind rotors will not interfere with each other and cause a loss in the wind energy capture efficiency. Compared with the original horizontal axis wind turbines and vertical axis wind turbines installed in the valley, the present invention can effectively improve the conversion efficiency of wind energy in the valley area.

[0023] Preferably, the wind turbine of the present invention can be installed in areas such as small hills, which can not only effectively utilize the horizontal wind flow, but also convert the mountain wind and valley wind in the valley into the required electrical energy, thereby realizing the efficient utilization of onshore wind energy;

[0024] The control method of the present invention monitors the wind speed and direction of horizontal wind and valley wind through a wind speed detection device. The wind wheel conversion control mechanism can control the wind wheel according to different wind conditions based on the wind energy in the valley, so that the operations of the two wind wheels will not affect each other, thereby realizing maximum utilization of wind energy resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the device of the present invention;

[0026] Figure 2 It is a side view of the device of the present invention;

[0027] Figure 3 It is a top view of the device of the present invention;

[0028] Figure 4 A is a side view of the device of the present invention;

[0029] Figure 5 It is a side view b of the device of the present invention;

[0030] Figure 6 A is a partial view of the conversion mechanism of the device of the present invention;

[0031] Figure 7 b is a partial view of the conversion mechanism of the device of the present invention;

[0032] Figure 8c is a partial view of the conversion mechanism of the device of the present invention;

[0033] Fig. 9 This is a cross-sectional view of the wind wheel and conversion mechanism of the device of the present invention;

[0034] Fig.10 It is an exploded view of the device of the present invention;

[0035] Fig.11 The horizontal wind wheel shaft system of the device of the present invention;

[0036] Fig.12 The vertical wind wheel shaft system of the device of the present invention;

[0037] Fig.13 A conversion wheel for the device of the present invention;

[0038] Fig.14 A conversion wheel driving gear for the device of the present invention;

[0039] Fig.15 The driven gear shaft system of the device of the present invention;

[0040] Fig.16 The horizontal wind wheel shaft of the device of the present invention;

[0041] Fig.17 The vertical wind wheel axis of the device of the present invention;

[0042] Fig.18 The conversion wheel control ring of the device of the present invention;

[0043] Fig.19 This is a working state diagram of the device of the present invention;

[0044] Fig. 20 It is the working flow chart of the device of the present invention;

[0045] Fig.21 Schematic diagram of wind turbines being affected by horizontal wind and valley wind between hills;

[0046] Fig. 22 This is a schematic diagram of the wind turbine being affected by horizontal wind and mountain wind between hills;

[0047] In the attached drawings: 1-vertical wind rotor, 2-horizontal wind rotor, 3-tower, 4-horizontal wind speed and direction instrument, 5-wind rotor conversion mechanism, 6-cabin, 7-first fixed rib plate, 8-vertical wind speed and direction instrument, 9-second fixed rib plate, 10-vertical axis hydraulic device, 11-horizontal axis hydraulic device, 12-driven gear shaft, 13-vertical axis driven gear, 14-horizontal axis driven gear, 15-vertical axis conversion wheel drive gear positioning pin, 16-vertical axis main shaft spline keyway, 17-vertical axis conversion wheel drive gear, 18-horizontal axis main shaft spline keyway, 19-horizontal axis conversion wheel drive gear positioning pin, 20-horizontal axis conversion wheel drive gear, 21-vertical axis conversion wheel positioning pin hole, 22-horizontal axis conversion wheel positioning pin hole, 23-vertical axis conversion wheel control ring, 24-vertical axis conversion wheel, 25-horizontal axis conversion wheel control ring, 26-horizontal axis conversion wheel Wheel change, 27-horizontal wind wheel shaft, 28-vertical wind wheel shaft, 29-first horizontal wind wheel bearing, 30-second horizontal wind wheel bearing, 31-third horizontal wind wheel bearing, 32-horizontal shaft drive gear bearing, 33-fourth horizontal wind wheel bearing, 34-vertical shaft conversion wheel keyway, 35-vertical shaft drive gear bearing, 36-horizontal shaft conversion wheel keyway, 37-first driven gear bearing, 38-gearbox input shaft, 39-gearbox, 40-horizontal shaft conversion wheel spline, 41-vertical shaft conversion wheel spline, 42-first key, 43-second key, 44-vertical shaft conversion wheel control ring connecting hole, 45-horizontal shaft conversion wheel control ring connecting hole, 46-vertical shaft parallel blade support shaft, 47-mountain top; 48-valley; 49-horizontal wind; 50-valley wind; 51-mountain wind; 52-second driven gear bearing; 53-vertical wind wheel bearing. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] like Figure 1-5 As shown, the present invention provides a wind turbine suitable for valleys and a transmission control mechanism thereof, wherein the wind turbine rotor is composed of two mutually independent horizontal wind rotors 2 and vertical wind rotors 1, and the horizontal wind from the horizontal direction and the valley wind from the nearly vertical direction are respectively utilized by the horizontal wind rotor 2 and the vertical wind rotor 1, and the wind turbine is realized in different operating states by a wind rotor conversion mechanism 5, so as to maximize the utilization of wind energy resources, specifically: comprising a vertical wind rotor 1, a horizontal wind rotor 2, a tower 3, a horizontal wind speed and direction instrument 4, a wind rotor conversion mechanism 5, a nacelle 6, a first fixed rib plate 7, a vertical wind speed and direction instrument 8, a second fixed rib plate 9, a vertical axis hydraulic device 10 and a horizontal axis hydraulic device 11;

[0050] Among them, the tower 3 is vertically fixed on the valley slope, and a cabin 6 is fixed on the top of the tower 3. A horizontal wind speed and direction meter 4 is arranged on the top of the cabin 6 to monitor the wind speed of the horizontal wind, and a vertical wind speed and direction meter 8 is fixed on the tower 3 to monitor the wind speed of the vertical wind. The cabin 6 is connected to the wind wheel conversion mechanism 5 on the side close to the wind wheel, and the wind wheel conversion mechanism 5 and the cabin 6 are further reinforced on the upper and lower sides by the first fixed rib plate 7 and the second fixed plate rib 9; the side of the wind wheel conversion mechanism 5 close to the wind wheel is connected to the vertical wind wheel 1 and the horizontal wind wheel 2 through the vertical wind wheel shaft 28 and the horizontal wind wheel shaft 27 respectively, the rotation center of the vertical wind wheel 1 and the horizontal wind wheel 2 are on the same axis and the vertical wind wheel 1 is arranged behind the horizontal wind wheel 2, and the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are both connected to the wind wheel conversion mechanism 5 to drive the wind wheel conversion mechanism 5 to realize the independent rotation of the vertical wind wheel 1 and the horizontal wind wheel 2.

[0051] The present invention arranges the horizontal wind rotor 2 in front of the vertical wind rotor 1, which can avoid the vertical wind rotor 1 disturbing the horizontal wind and affecting the work of the horizontal wind rotor 2, and also reduce the disturbing effect of the horizontal wind rotor 2 on the vertical wind.

[0052] Preferably, the number of blades of the horizontal wind rotor 2 is 3, and the shape and size of the rotor are determined according to the specific conditions of the local wind field (valley) (such as altitude, annual average wind speed, temperature, etc.), as well as factors such as output power.

[0053] like Fig.12 , 17 As shown, the vertical wind wheel 1 includes three blade support shafts 46, and each blade support shaft 46 is connected in parallel with two vertical wind blades of different sizes and the same shape, and the windward surface of the vertical shaft blade faces the vertical wind wheel shaft.

[0054] Preferably, three blade support shafts 46 are evenly distributed on the front end hub of the vertical wind wheel shaft 28 .

[0055] Preferably, the shape and size of the vertical wind blades should be selected based on the specific conditions of the local wind field (valley) (such as altitude, annual average wind speed, temperature, etc.), as well as factors such as output power to determine the shape and size of the wind wheel.

[0056] Preferably, the horizontal wind wheel shaft 27 is a solid shaft, and the vertical wind wheel shaft 28 is a hollow shaft. The horizontal wind wheel shaft 27 passes through the center of the vertical wind wheel shaft 28, and a first horizontal wind wheel bearing 29, a second horizontal wind wheel bearing 30, and a third horizontal wind wheel bearing 31 are fixed in the vertical wind wheel shaft 28. A fourth horizontal wind wheel bearing 33 is fixed on the inner surface of the wind wheel conversion mechanism box. The above four bearings support and axially fix the horizontal wind wheel shaft 27 in the vertical wind wheel shaft 28 to ensure that the horizontal wind wheel shaft 27 can rotate circumferentially relative to the vertical wind wheel shaft 28; a vertical wind wheel bearing 53 and a bearing 35 are arranged inside the wind wheel conversion mechanism box to realize the axial fixation and circumferential relative rotation of the vertical wind wheel shaft 28. In the present invention, the horizontal wind wheel shaft 27 and the vertical wind wheel shaft 28 are nested in each other to realize the independent rotation and simultaneous rotation of the two wind wheels.

[0057] Preferably, the horizontal wind wheel shaft 27 and the vertical wind wheel shaft 28 rotate on the same axis.

[0058] Preferably, the outer diameter of the horizontal wind wheel shaft 27 is smaller than the inner diameter of the vertical wind wheel shaft 28.

[0059] like Figure 6-11 As shown, the wind wheel conversion mechanism 5 is arranged in the wind wheel conversion mechanism box, and a second driven gear bearing 52 and a vertical wind wheel bearing 53 are arranged on a side wall of the wind wheel conversion mechanism box close to the wind wheel, and a first driven gear bearing 37 and a fourth horizontal wind wheel bearing 33 are arranged on a side wall close to the nacelle 6. A vertical shaft driving gear bearing 35 is also arranged in the wind wheel conversion mechanism box, and the vertical wind wheel shaft 28 realizes axial fixation and circumferential relative rotation of the vertical wind wheel shaft 28 through the vertical wind wheel bearing 53 and the vertical shaft driving gear bearing 35. A first horizontal wind wheel bearing 29, a second horizontal wind wheel bearing 30, and a third horizontal wind wheel bearing 31 are fixed in the wheel shaft 28; the horizontal wind wheel shaft 27 is supported and axially fixed in the vertical wind wheel shaft 28 by the first horizontal wind wheel bearing 29, the second horizontal wind wheel bearing 30, the third horizontal wind wheel bearing 31, and the fourth horizontal wind wheel bearing 33, ensuring that the horizontal wind wheel shaft 27 can rotate circumferentially relative to the vertical wind wheel shaft 28; the driven gear shaft 12 is axially fixed by the second driven gear bearing 52 and the first driven gear bearing 37.

[0060] The wind wheel conversion mechanism 5 includes a vertical wind wheel driving gear set and a horizontal wind wheel driving gear set with the same structure, and a driven gear shaft system meshing with the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set. The vertical wind wheel driving gear set is arranged in front of the horizontal wind wheel driving gear set. The vertical wind wheel driving gear set and the horizontal wind wheel driving gear set are respectively connected to the vertical wind wheel shaft 28 and the horizontal wind wheel shaft 27 through splines. The driven gear shaft system is connected to the nacelle 6, and the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set are both driven by a hydraulic device.

[0061] Preferably, the vertical wind rotor driving gear set includes a vertical axis conversion wheel 24, a vertical axis conversion wheel driving gear 17, and a vertical axis conversion wheel control ring 23; the horizontal wind rotor driving gear set includes a horizontal axis conversion wheel 26, a horizontal axis conversion wheel driving gear 20, and a horizontal axis conversion wheel control ring 25; the driven gear shaft system includes a driven gear shaft 12, a vertical axis driven gear 13 and a horizontal axis driven gear 14 fixed on the driven gear shaft 12 by a first key 42 and a second key 43, the vertical axis driven gear 13 and the horizontal axis driven gear 14 are respectively meshed with the vertical axis conversion wheel driving gear 17 and the horizontal axis conversion wheel driving gear 20, and the end of the driven gear shaft 12 away from the wind rotor is connected to the nacelle 6;

[0062] Preferably, a gearbox 39 is provided in the nacelle 6, and a gearbox input shaft 38 of the gearbox 39 extends out of the nacelle 6 and is connected to the driven gear shaft 12;

[0063] Preferably, there is a relationship between the pitch circle diameter D1 of the vertical axis conversion wheel driving gear 17 and the shaft diameter d1 of the vertical wind wheel shaft 28: D1 = (3.5-4.5) * d1.

[0064] Preferably, there is a relationship between the pitch circle diameter D2 of the horizontal axis conversion wheel driving gear 20 and the shaft diameter d2 of the horizontal wind wheel shaft 27: D2 = (3.5-4.5) * d2.

[0065] like Figure 13-15 and Fig.18 As shown, the structures of the components in the vertical wind rotor driving gear set and the horizontal wind rotor driving gear set are the same, so the structure of the horizontal wind rotor driving gear set is taken as an example for specific description:

[0066] The horizontal wind wheel driving gear set includes a horizontal axis conversion wheel 26, a horizontal axis conversion wheel driving gear 20, a horizontal axis conversion wheel control ring 25 and a horizontal axis hydraulic device 11. The horizontal axis conversion wheel driving gear 20 is fixed to the end of the horizontal wind wheel shaft 27 away from the wind wheel. The horizontal axis conversion wheel 26 is sleeved on the horizontal wind wheel shaft 27 and is arranged close to the horizontal axis conversion wheel driving gear 20:

[0067] A horizontal axis conversion wheel spline 40 and a plurality of horizontal axis conversion wheel positioning pin holes 22 are formed on the end surface of the horizontal axis conversion wheel 26. The horizontal axis conversion wheel spline 40 is arranged at the center of the end surface of the horizontal axis conversion wheel 26, and the plurality of horizontal axis conversion wheel positioning pin holes 22 are arranged around the horizontal axis conversion wheel spline 40 and are evenly arranged.

[0068] like Fig.16 As shown, a spline keyway 18 is provided on the end of the horizontal wind wheel shaft 27 away from the horizontal wind wheel 2, and the horizontal wind wheel shaft 27 cooperates with the horizontal axis conversion wheel spline 40 through the spline keyway 18 to fix the horizontal axis conversion wheel 26 circumferentially relative to the horizontal wind wheel shaft 27.

[0069] One end of the horizontal axis conversion wheel control ring 25 is arc-shaped, and the other end is provided with a connecting hole 45. The outer ring of the horizontal axis conversion wheel 26 is provided with a groove, and the groove is axially fixedly connected to the arc-shaped end of the horizontal axis conversion wheel control ring 25 and circumferentially rotatably connected. The connecting hole 45 of the horizontal axis conversion wheel control ring 25 is fixedly connected to the axis of the horizontal axis hydraulic device 11, and the movement of the horizontal axis conversion wheel control ring 25 is controlled by the driving action of the horizontal axis hydraulic device 11, thereby pushing the horizontal axis conversion wheel 26 to move axially on the horizontal wind wheel shaft 27.

[0070] Preferably, the length L1 of the spline keyway 18 and the diameter d2 of the horizontal wind wheel shaft 27 have the following relationship: L1 = (3.5-4.1) * d2.

[0071] Preferably, a horizontal axis drive gear bearing 32 and a plurality of horizontal axis drive gear locating pins 19 are provided on the horizontal axis conversion wheel drive gear 20. The horizontal axis drive gear bearing 32 is arranged in the middle of the horizontal axis conversion wheel drive gear 20. The plurality of horizontal axis drive gear locating pins 19 are evenly arranged around the horizontal axis drive gear bearing 32 on one end surface of the horizontal axis conversion wheel drive gear 20. The horizontal axis drive gear locating pins 19 are used in conjunction with the locating pin holes 22 on the horizontal axis conversion wheel 26. The horizontal axis drive gear locating pins 19 are inserted into or pulled out of the locating pin holes 22 through the axial movement of the horizontal axis conversion wheel 26 on the horizontal wind wheel shaft 27, thereby realizing the closing and separation of the horizontal axis conversion wheel 26 and the horizontal axis drive gear 20.

[0072] When the horizontal axis hydraulic device 11 drives the horizontal axis conversion wheel 26 to close with the horizontal axis driving gear 20, the horizontal axis driving gear 20 rotates together with the horizontal wind wheel shaft 27 and the horizontal axis conversion wheel 26, the horizontal axis driving gear 20 is meshed with the horizontal axis driven gear 14, the horizontal axis driving gear 20 drives the horizontal axis driven gear 14 to rotate, the horizontal axis driven gear 14 drives the driven gear shaft 12 to rotate, the driven gear shaft 12 is axially fixed by the driven gear bearing 37 and the second driven gear bearing 52, the end of the driven gear shaft 12 is connected to the gear box input shaft 38 of the gear box 39, thereby driving the generator to generate electricity.

[0073] When the horizontal axis hydraulic device 11 drives the horizontal axis conversion wheel 26 to separate from the horizontal axis driving gear 20 , the horizontal axis driving gear 20 is stationary or idle on the horizontal axis 27 under the action of the horizontal axis driving gear bearing 32 and the horizontal axis driven gear 14 .

[0074] Correspondingly, for the vertical wind wheel 1, when the vertical axis hydraulic device 10 and the vertical axis conversion wheel control ring 23 drive the vertical axis conversion wheel 24 and the vertical axis driving gear 17 to close, the vertical axis driving gear 17 and the vertical wind wheel shaft 28 are fixed, and the vertical axis driving gear 17 drives the vertical axis driven gear 13 to rotate, thereby driving the driven shaft gear shaft 12 to rotate, thereby driving the generator to generate electricity.

[0075] When the vertical axis hydraulic device 10 drives the vertical axis conversion wheel 24 to separate from the vertical axis driving gear 17 through the vertical axis conversion wheel control ring 23, the vertical axis driving gear 17 is stationary or idle on the vertical wind wheel shaft 28 under the action of the vertical axis driving gear bearing 35 and the vertical axis driven gear 13;

[0076] When the vertical axis conversion wheel 24 is closed with the vertical axis driving gear 17 and the horizontal axis conversion wheel 26 is separated from the horizontal axis driving gear 20, the vertical axis driving gear 17 drives the vertical axis driven gear 13 to rotate relative to it, and the vertical axis driven gear 13 drives the horizontal axis driven gear 14 to rotate. The horizontal axis driving gear 20 idles relative to the horizontal wind wheel shaft 27 under the drive of the horizontal axis driven gear 14.

[0077] When the vertical axis conversion wheel 24 is separated from the vertical axis driving gear 17 and the horizontal axis conversion wheel 26 is closed with the horizontal axis driving gear 20, the horizontal axis driving gear 20 drives the horizontal axis driven gear 14 to rotate relative to it, and the horizontal axis driven gear 14 drives the vertical axis driven gear 13 to rotate. The vertical axis driving gear 17 idles relative to the vertical wind wheel shaft 28 under the drive of the vertical axis driven gear 13.

[0078] When the vertical axis conversion wheel 24 and the vertical axis driving gear 17 and the horizontal axis conversion wheel 26 and the horizontal axis driving gear 20 are all closed, the vertical axis driving gear 17 and the horizontal axis driving gear 20 respectively drive the vertical axis driven gear 13 and the horizontal axis driven gear 14 to do work.

[0079] When the wind turbine and transmission control mechanism suitable for valleys of the present invention are used, the specific control method is as follows:

[0080] like Fig.21 , 22 As shown, the valley area includes a valley 48 and a mountain top 47. The wind energy resources in this area are rich, but the wind energy characteristics are complex and diverse, including not only horizontal wind 49 flowing horizontally, but also valley wind 50 blowing from the valley bottom to the mountain top and mountain wind 51 blowing from the mountain top to the valley. Since the flow directions of the valley wind 50 and the mountain wind 51 are nearly perpendicular to the horizontal wind, the mountain wind and the valley wind are collectively referred to as vertical wind. The wind turbine of the present invention can make maximum use of the above two types of wind energy resources.

[0081] like Fig. 20 As shown, the wind turbine provided by the present invention is divided into 4 working states, namely:

[0082] 1. When the horizontal wind speed is less than 3m / s and the vertical wind speed is less than 1m / s, both the vertical wind wheel and the horizontal wind wheel are not working and are in a shutdown state. At this time, the state of the drive transmission mechanism is as follows: Fig.19 As shown in a;

[0083] 2. When the horizontal wind speed is greater than 3m / s and the vertical wind speed is less than 1m / s, the horizontal wind rotor is in working state and the vertical wind rotor is in shutdown state. At this time, the state of the drive transmission mechanism is as follows: Fig.19 As shown in c;

[0084] 3. When the horizontal wind speed is less than 3m / s and the vertical wind speed is greater than 1m / s, the vertical wind rotor is in working state and the horizontal wind rotor is in shutdown state. At this time, the state of the drive transmission mechanism is as follows: Fig.19 As shown in b;

[0085] 4. When the horizontal wind speed is greater than 3m / s and the vertical wind speed is also greater than 1m / s, both the vertical wind wheel and the horizontal wind wheel are in working state. At this time, the state of the drive transmission mechanism is as follows: Fig.19 As shown in d.

[0086] The above specific wind turbine working status is described as follows

[0087] (a) Both wind turbines are not working and are in shutdown state.

[0088] When the vertical axis wind speed and direction instrument 8 installed on the tower 3 and the horizontal axis wind speed and direction instrument 4 installed on the top of the nacelle 6 detect that the wind speed at the installation position is less than 1m / s and 3m / s respectively, since the horizontal wind wheel 2 and the vertical wind wheel 1 have not reached the starting wind speed, the horizontal wind wheel 2 and the vertical wind wheel 1 do not work. The horizontal axis wind speed and direction instrument 4 and the vertical axis wind speed and direction instrument 8 feed back the relevant data to the control end of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 to control the working state of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11.

[0089] Since neither the vertical wind wheel 1 nor the horizontal wind wheel 2 has reached the starting wind speed, the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 do not work, that is, the vertical axis hydraulic device 10 will not apply force to close the vertical axis conversion wheel 24 and the vertical axis conversion wheel driving gear 17, and the vertical axis conversion wheel locating pin hole 21 and the vertical axis conversion wheel driving gear locating pin 15 are separated; the horizontal axis hydraulic device 11 will not apply force to close the horizontal axis conversion wheel 26 and the horizontal axis conversion wheel driving gear 20, and the horizontal axis conversion wheel locating pin hole 22 and the horizontal axis conversion wheel driving gear locating pin 19 are separated.

[0090] The vertical axis conversion wheel driving gear 17 installed on the vertical wind wheel shaft 28 and the horizontal axis conversion wheel driving gear 20 installed on the horizontal wind wheel shaft 27 are respectively meshed with the vertical axis driven gear 13 and the horizontal axis driven gear 14 fixed on the driven gear shaft 12 through the first key 42 and the second key 43. Because the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are connected to the vertical axis conversion wheel control ring 23 and the vertical axis conversion wheel control ring connecting hole 44 and the horizontal axis conversion wheel control ring connecting hole 45 on the horizontal axis conversion wheel control ring 25, the rotation of the vertical axis conversion wheel 24 and the horizontal axis conversion wheel 26 will not drive the rotation of the vertical axis conversion wheel control ring 23 and the horizontal axis conversion wheel control ring 25, and the friction between them is very small. Therefore, when the vertical wind wheel 1 and the horizontal wind wheel 2 have not reached the starting wind speed, the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 do not work, and the rotation of the vertical wind wheel 1 and the horizontal wind wheel 2 will only drive the horizontal wind wheel shaft 27, the vertical wind wheel shaft 28 and the vertical axis conversion wheel 24, the horizontal axis conversion wheel 26, the vertical axis driving gear bearing 35, and the horizontal axis driving gear bearing 32 that cooperate with the vertical axis main shaft spline keyway 16, the horizontal axis main shaft spline keyway 18 and the horizontal axis conversion wheel spline 40 and the vertical axis conversion wheel spline 41 to rotate together, while the vertical axis conversion wheel driving gear 17, the horizontal axis conversion wheel driving gear 20 and the vertical axis conversion wheel control ring 23, the horizontal axis conversion wheel control ring 25 connected to the vertical axis conversion wheel 24 and the horizontal axis conversion wheel 26 and the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 will not rotate with the rotation of the conversion wheel. The vertical axis driven gear 13 and the horizontal axis driven gear 14 are meshed with the vertical axis conversion wheel driving gear 17 and the horizontal axis conversion wheel driving gear 20, so the vertical axis conversion wheel driving gear 17 and the horizontal axis conversion wheel driving gear 20 will not drive the vertical axis driven gear 13 and the horizontal axis driven gear 14 to rotate, and the driven gear shaft 12 does not rotate either, so the horizontal wind wheel 2 and the vertical wind wheel 1 do not do work.

[0091] (II) Horizontal wind rotor working state - vertical wind rotor shutdown state

[0092] When the horizontal axis wind speed and direction meter 4 installed on the top of the nacelle 6 detects that the wind speed at the installation position is greater than 3m / s, but the vertical axis wind speed and direction meter 8 installed on the tower 3 detects that the wind speed at the installation position is less than 1m / s, because only the horizontal wind wheel 2 reaches the starting wind speed, the horizontal wind wheel 2 works, and the vertical wind wheel 1 does not work. The horizontal axis wind speed and direction meter 4 and the vertical axis wind speed and direction meter 8 feed back the detected relevant data to the control end of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 to control the working status of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11. Since only the horizontal wind wheel 2 reaches the starting wind speed, the horizontal axis hydraulic device 11 works, and the vertical axis hydraulic device 10 does not work, that is, the horizontal axis hydraulic device 11 will exert force to close the horizontal axis conversion wheel 26 and the horizontal axis conversion wheel driving gear 20, and the horizontal axis conversion wheel positioning pin hole 22 cooperates with the horizontal axis conversion wheel driving gear positioning pin 19; and since the wind speed of the vertical wind is relatively low, the vertical axis hydraulic device 10 will not exert force to close the vertical axis conversion wheel 24 and the vertical axis conversion wheel driving gear 17, so the vertical axis conversion wheel positioning pin hole 21 and the vertical axis conversion wheel driving gear positioning pin 15 are in a separated state. The vertical axis conversion wheel driving gear 17 installed on the vertical wind wheel shaft 28 and the horizontal axis conversion wheel driving gear 20 installed on the horizontal wind wheel shaft 27 are respectively meshed with the vertical axis driven gear 13 and the horizontal axis driven gear 14 fixed on the driven gear shaft 12 through the first key 42 and the second key 43. Because the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are connected to the vertical axis conversion wheel control ring 23 and the vertical axis conversion wheel control ring 25 through the vertical axis conversion wheel control ring connecting hole 44 and the horizontal axis conversion wheel control ring connecting hole 45, the rotation of the vertical axis conversion wheel 24 and the horizontal axis conversion wheel 26 will not drive the rotation of the vertical axis conversion wheel control ring 23 and the horizontal axis conversion wheel control ring 25, and the friction between them is very small. When the horizontal wind wheel 2 reaches the starting wind speed, the horizontal axis hydraulic device 11 works, and the horizontal axis conversion wheel 26 cooperates with the horizontal axis conversion wheel drive gear locating pin 19 through the horizontal axis conversion wheel locating pin hole 22 under the action of the horizontal axis hydraulic device 11 and the horizontal axis conversion wheel control ring 25, so that the horizontal axis conversion wheel 26 that cooperates with the horizontal axis conversion wheel spline 40 through the horizontal axis main shaft spline keyway 18 and the horizontal axis conversion wheel drive gear 20 that cooperates with the horizontal axis conversion wheel drive gear bearing 32 on the horizontal wind wheel shaft 27 are closed.

[0093] The horizontal axis conversion wheel driving gear 20 is meshed with the horizontal axis driven gear 14, so the rotation of the horizontal axis conversion wheel driving gear 20 will drive the rotation of the horizontal axis driven gear 14, and the rotation of the horizontal axis driven gear 14 will drive the driven gear shaft 12 to rotate, and the driven gear shaft 12 will drive the rotation of the gear box input shaft 38, and the gear box input shaft 38 will transfer the torque to the gear box 39, so that the horizontal wind wheel 2 does work to generate electricity. However, in this case, since the rotation of the driven gear shaft 12 will drive the vertical axis driven gear 13 to rotate together, and the vertical axis driven gear 13 is meshed with the vertical axis conversion wheel driving gear 17, the rotation of the driven gear shaft 12 will also drive the rotation of the vertical axis conversion wheel driving gear 17, but since the vertical wind wheel 1 has not reached the starting wind speed, the vertical axis hydraulic device 10 will not apply force, the vertical axis conversion wheel 24 is separated from the vertical axis conversion wheel driving gear 17, and the vertical wind wheel 1 does not do work.

[0094] (III) Working status of vertical wind rotor

[0095] When the vertical axis wind speed and direction meter 8 installed on the tower 3 detects that the wind speed at the installation position is greater than 1m / s, but the horizontal axis wind speed and direction meter 4 installed on the top of the nacelle 6 detects that the wind speed at the installation position is less than 3m / s, because only the vertical wind wheel 1 reaches the starting wind speed, the vertical wind wheel 1 works, and the horizontal wind wheel 2 does not work. The horizontal axis wind speed and direction meter 4 and the vertical axis wind speed and direction meter 8 feed back the detected relevant data to the control end of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 to control the working status of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11. Since only the vertical wind wheel 1 reaches the starting wind speed, the vertical axis hydraulic device 10 works, and the horizontal axis hydraulic device 11 does not work, that is, the vertical axis hydraulic device 10 will apply force to close the vertical axis conversion wheel 24 and the vertical axis conversion wheel driving gear 17, and the vertical axis conversion wheel positioning pin hole 21 cooperates with the vertical axis conversion wheel driving gear positioning pin 15; and since the wind speed of the horizontal wind is relatively low, the horizontal axis hydraulic device 11 will not apply force to close the horizontal axis conversion wheel 26 and the horizontal axis conversion wheel driving gear 20, so the horizontal axis conversion wheel positioning pin hole 22 and the horizontal axis conversion wheel driving gear positioning pin 19 are in a separated state. The vertical axis conversion wheel driving gear 17 installed on the vertical wind wheel shaft 28 and the horizontal axis conversion wheel driving gear 20 installed on the horizontal wind wheel shaft 27 are respectively meshed with the vertical axis driven gear 13 and the horizontal axis driven gear 14 fixed on the driven gear shaft 12 through the first key 42 and the second key 43. Because the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are connected to the vertical axis conversion wheel control ring 23 and the vertical axis conversion wheel control ring 25 of the vertical axis conversion wheel control ring 44 and the horizontal axis conversion wheel control ring 45, the rotation of the vertical axis conversion wheel 24 and the horizontal axis conversion wheel 26 will not drive the rotation of the vertical axis conversion wheel control ring 23 and the horizontal axis conversion wheel control ring 25, and the friction between them is very small. Therefore, when the vertical wind wheel 1 reaches the starting wind speed, the vertical axis hydraulic device 10 works. Under the action of the vertical axis hydraulic device 10 and the vertical axis conversion wheel control ring 23, the vertical axis conversion wheel 24 cooperates with the vertical axis conversion wheel drive gear locating pin 21 through the vertical axis conversion wheel locating pin hole 15, so that the vertical axis conversion wheel 24 that cooperates with the vertical axis conversion wheel keyway 41 through the vertical axis main shaft spline keyway 16 and the vertical axis conversion wheel drive gear 17 that cooperates with the vertical axis conversion wheel drive gear bearing 35 on the vertical wind wheel shaft 28 are closed. The vertical axis conversion wheel driving gear 17 is meshed with the vertical axis driven gear 13, so the rotation of the vertical axis conversion wheel driving gear 17 drives the rotation of the vertical axis driven gear 13. The rotation of the vertical axis driven gear 13 drives the driven gear shaft 12 to rotate, and the rotation of the driven gear shaft 12 drives the rotation of the gear box input shaft 38, and the gear box input shaft 38 transmits the torque to the gear box 39, and the vertical wind wheel 1 generates power.

[0096] However, in this case, the rotation of the driven gear shaft 12 will drive the horizontal axis driven gear 14 to rotate together, and the horizontal axis driven gear 14 is meshed with the horizontal axis conversion wheel driving gear 20, so the rotation of the driven gear shaft 12 will also drive the rotation of the horizontal axis conversion wheel driving gear 20. However, since the horizontal wind wheel 2 has not reached the starting wind speed, the horizontal axis hydraulic device 11 will not apply force, the horizontal axis conversion wheel 26 is separated from the horizontal axis conversion wheel driving gear 20, and the horizontal wind wheel does not do work.

[0097] (IV) Working status of two wind turbines

[0098] When the vertical axis wind speed and direction instrument 8 installed on the tower 3 and the horizontal axis wind speed and direction instrument 4 installed on the top of the nacelle 6 detect that the wind speed at the installation position is greater than 1m / s and 3m / s respectively, because the horizontal wind wheel 2 and the vertical wind wheel 1 have reached the starting wind speed, the vertical wind wheel 1 and the horizontal wind wheel 2 both work. The horizontal axis wind speed and direction instrument 4 and the vertical axis wind speed and direction instrument 8 feed back the detected relevant data to the control end of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 to control the working state of the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11. Since both the vertical wind wheel 1 and the horizontal wind wheel 2 have reached the starting wind speed, the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are both working, that is, the vertical axis hydraulic device 10 will apply force to close the vertical axis conversion wheel 24 and the vertical axis conversion wheel driving gear 17, and the vertical axis conversion wheel positioning pin hole 21 will cooperate with the vertical axis conversion wheel driving gear positioning pin 15; the horizontal axis hydraulic device 11 will also apply force to close the horizontal axis conversion wheel 26 and the horizontal axis conversion wheel driving gear 20, and the horizontal axis conversion wheel positioning pin hole 22 will cooperate with the horizontal axis conversion wheel driving gear positioning pin 19. The vertical axis conversion wheel driving gear 17 installed on the vertical wind wheel shaft 28 and the horizontal axis conversion wheel driving gear 20 installed on the horizontal wind wheel shaft 27 are respectively meshed with the vertical axis driven gear 13 and the horizontal axis driven gear 14 fixed on the driven gear shaft 12 through the first key 42 and the second key 43. Although the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 are connected to the vertical axis conversion wheel control ring 23 and the vertical axis conversion wheel control ring 25 on the vertical axis conversion wheel control ring 44 and the horizontal axis conversion wheel control ring 45, the rotation of the vertical axis conversion wheel 24 and the horizontal axis conversion wheel 26 will not drive the rotation of the vertical axis conversion wheel control ring 23 and the horizontal axis conversion wheel control ring 25, and the friction between them is very small. Therefore, when the vertical wind wheel 1 and the horizontal wind wheel 2 both reach the starting wind speed, the vertical axis hydraulic device 10 and the horizontal axis hydraulic device 11 both start to work. Under the action of the horizontal axis hydraulic device 11 and the horizontal axis conversion wheel control ring 25, the horizontal axis conversion wheel 26 cooperates with the horizontal axis conversion wheel drive gear locating pin 19 through the horizontal axis conversion wheel locating pin hole 22, so that the horizontal axis conversion wheel 26 that cooperates with the horizontal axis conversion wheel spline 40 through the horizontal axis main shaft spline keyway 18 and the horizontal axis conversion wheel drive gear 20 that cooperates with the horizontal axis conversion wheel drive gear bearing 32 on the horizontal wind wheel shaft 27 are closed. Under the action of the vertical axis hydraulic device 10 and the vertical axis conversion wheel control ring 23, the vertical axis conversion wheel 24 cooperates with the vertical axis conversion wheel drive gear locating pin 21 through the vertical axis conversion wheel locating pin hole 15, so that the vertical axis conversion wheel 24 that cooperates with the vertical axis conversion wheel keyway 41 through the vertical axis main shaft spline keyway 16 and the vertical axis conversion wheel drive gear 17 that cooperates with the vertical axis conversion wheel drive gear bearing 35 on the vertical wind wheel shaft 28 are closed.The rotation of the vertical wind wheel 1 and the horizontal wind wheel 2 will drive the vertical axis conversion wheel driving gear 17 and the horizontal axis conversion wheel driving gear 20 to rotate, wherein the horizontal axis conversion wheel driving gear 20 is meshed with the horizontal axis driven gear 14, and the vertical axis conversion wheel driving gear 17 is meshed with the vertical axis driven gear 13, so the rotation of the horizontal axis conversion wheel driving gear 20 will drive the rotation of the horizontal axis driven gear 14, and the rotation of the vertical axis conversion wheel driving gear 17 will drive the rotation of the vertical axis driven gear 13. The rotation of the horizontal axis driven gear 14 will drive the driven gear shaft 12 to rotate, and the rotation of the vertical axis driven gear 13 will drive the driven gear shaft 12 to rotate. In this way, the torque of the vertical wind wheel 1 and the horizontal wind wheel 2 are both transmitted to the driven gear shaft 12, and the rotation of the driven gear shaft 12 will drive the rotation of the gear box input shaft 38, and the gear box input shaft 38 will transmit the torque to the gear box 39, and the horizontal wind wheel 2 and the vertical wind wheel 1 both do work.

Claims

1. A wind turbine suitable for use in valleys, characterized in that: The invention comprises a vertical wind wheel (1), a horizontal wind wheel (2), a tower (3), a wind wheel conversion mechanism (5), a nacelle (6), and a wind speed detection device for detecting the wind speeds of the horizontal wind and the vertical wind, wherein the rotation centers of the vertical wind wheel (1) and the horizontal wind wheel (2) are on the same axis and the vertical wind wheel (1) is arranged behind the horizontal wind wheel (2), the vertical wind wheel shaft (28) of the vertical wind wheel (1) and the horizontal wind wheel shaft (27) of the horizontal wind wheel (2) are both connected to the wind wheel conversion mechanism (5), the wind wheel conversion mechanism (5) comprises a vertical wind wheel driving gear set and a horizontal wind wheel driving gear set for realizing independent or joint work of the vertical wind wheel (1) and the horizontal wind wheel (2) according to the wind speed detected by the wind speed detection device, the wind wheel conversion mechanism (5) is connected to the nacelle (6), and the nacelle (6) is fixed on the tower (3); The wind wheel conversion mechanism (5) comprises a vertical wind wheel driving gear set and a horizontal wind wheel driving gear set of the same structure, and a driven gear shaft system meshing with the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set, the vertical wind wheel driving gear set is arranged in front of the horizontal wind wheel driving gear set, the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set are respectively connected to the vertical wind wheel shaft (28) and the horizontal wind wheel shaft (27) through splines, and the end of the driven gear shaft system away from the wind wheel is connected to the nacelle (6); The driven gear shaft system comprises a driven gear shaft (12), a vertical shaft driven gear (13) and a horizontal shaft driven gear (14) being fixedly sleeved on the driven gear shaft (12), the vertical shaft driven gear (13) and the horizontal shaft driven gear (14) being respectively meshed with the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set, a gear box (39) being arranged in the cabin (6), a gear box input shaft (38) of the gear box (39) extending out of the cabin (6) and connected to the driven gear shaft (12); The horizontal wind wheel driving gear set comprises a horizontal axis conversion wheel (26), a horizontal axis conversion wheel driving gear (20), a horizontal axis conversion wheel control ring (25) and a horizontal axis hydraulic device (11); the horizontal axis conversion wheel driving gear (20) is fixed to an end of the horizontal wind wheel shaft (27) away from the wind wheel; the horizontal axis conversion wheel (26) is sleeved on the horizontal wind wheel shaft (27) and arranged close to the horizontal axis conversion wheel driving gear (20), wherein: A horizontal axis conversion wheel spline (40) and a plurality of horizontal axis conversion wheel positioning pin holes (22) are formed through the end surface of the horizontal axis conversion wheel (26); the horizontal axis conversion wheel spline (40) is arranged at the center of the end surface of the horizontal axis conversion wheel (26); and the plurality of horizontal axis conversion wheel positioning pin holes (22) are arranged around the horizontal axis conversion wheel spline (40) and are evenly arranged; A horizontal axis drive gear bearing (32) and a plurality of horizontal axis drive gear locating pins (19) are arranged on the horizontal axis conversion wheel drive gear (20); the horizontal axis drive gear bearing (32) is arranged in the middle of the horizontal axis conversion wheel drive gear (20); a plurality of horizontal axis drive gear locating pins (19) are evenly arranged around the horizontal axis drive gear bearing (32) on one end surface of the horizontal axis conversion wheel drive gear (20); the horizontal axis drive gear locating pins (19) cooperate with the locating pin holes (22) on the horizontal axis conversion wheel (26); One end of the horizontal axis conversion wheel control ring (25) is arc-shaped, and the other end is provided with a connection hole (45). The outer ring of the horizontal axis conversion wheel (26) is provided with a groove, and the groove is axially fixedly connected to the arc-shaped end of the horizontal axis conversion wheel control ring (25) and circumferentially rotatably connected. The connection hole (45) of the horizontal axis conversion wheel control ring (25) and the shaft of the horizontal axis hydraulic device (11) are mutually fixedly connected to realize the movement of the horizontal axis conversion wheel control ring (25), thereby pushing the horizontal axis conversion wheel (26) to move axially on the horizontal wind wheel shaft (27) so that the horizontal axis drive gear positioning pin (19) is inserted into or pulled out of the positioning pin hole (22), thereby realizing the closing and separation of the horizontal axis conversion wheel (26) and the horizontal axis conversion wheel drive gear (20).

2. A wind turbine suitable for valleys according to claim 1, characterized in that: Three blade support shafts (46) are evenly distributed on the vertical wind wheel (1), and two vertical wind blades of different sizes and the same shape are connected in parallel to each blade support shaft (46), with the windward surfaces of the vertical wind blades facing the vertical wind wheel axis.

3. A wind turbine suitable for valleys according to claim 1, characterized in that: The horizontal wind wheel shaft (27) is a solid shaft, and the vertical wind wheel shaft (28) is a hollow shaft. The horizontal wind wheel shaft (27) passes through the center of the vertical wind wheel shaft (28). The vertical wind wheel shaft (28) is provided with a plurality of bearings for supporting and axially fixing the horizontal wind wheel shaft (27) in the vertical wind wheel shaft (28). The wind wheel conversion mechanism (5) is arranged in a wind wheel conversion mechanism box. The wind wheel conversion mechanism box is provided with bearings for realizing axial fixation and circumferential relative rotation of the vertical wind wheel shaft (28).

4. A wind turbine suitable for valleys according to claim 1, characterized in that: A spline keyway (18) is provided on one end of the horizontal wind wheel shaft (27) away from the horizontal wind wheel (2), and the horizontal wind wheel shaft (27) cooperates with the horizontal axis conversion wheel spline (40) through the spline keyway (18) to fix the horizontal axis conversion wheel (26) circumferentially relative to the horizontal wind wheel shaft (27).

5. A wind turbine suitable for valleys according to claim 4, characterized in that: The relationship between the length L1 of the spline keyway (18) and the shaft diameter d2 of the horizontal wind wheel shaft (27) is: L1 = (3.5-4.1)*d2.

6. A wind turbine suitable for valleys according to claim 1, characterized in that: The relationship between the pitch circle diameter D2 of the horizontal shaft conversion wheel driving gear (20) and the shaft diameter d2 of the horizontal wind wheel shaft (27) is: D2 = (3.5~4.5)*d2.

7. The control method of a wind turbine suitable for use in a mountain valley according to claim 1, characterized in that: There are four working states, as follows: 1) When the wind speed detection device detects that the horizontal wind speed is less than 3 m / s and the vertical wind speed is less than 1 m / s, the vertical wind wheel (1) and the horizontal wind wheel (2) are both in a non-operating shutdown state. Specifically, the vertical wind wheel driving gear set and the horizontal wind wheel driving gear set of the wind wheel conversion mechanism (5) are both not working; 2) When the wind speed detection device detects that the horizontal wind speed is greater than 3 m / s and the vertical wind speed is less than 1 m / s, the horizontal wind wheel (2) is in a working state and the vertical wind wheel (1) is in a stopped state. Specifically, the horizontal wind wheel (2) drives the horizontal wind wheel driving gear of the wind wheel conversion mechanism (5) to generate power, and the vertical wind wheel (1) does not drive the vertical wind wheel driving gear group to generate power; 3) When the wind speed detection device detects that the horizontal wind speed is less than 3 m / s and the vertical wind speed is greater than 1 m / s, the vertical wind wheel (1) is in a working state and the horizontal wind wheel (2) is in a stopped state. Specifically, the vertical wind wheel (1) drives the vertical wind wheel driving gear set of the wind wheel conversion mechanism (5) to generate power, and the horizontal wind wheel (2) does not drive the horizontal wind wheel driving gear of the wind wheel conversion mechanism (5) to generate power; 4) When the wind speed detection device detects that the horizontal wind speed is greater than 3 m / s and the vertical wind speed is also greater than 1 m / s, the vertical wind wheel (1) and the horizontal wind wheel (2) are both in a working state. Specifically, the vertical wind wheel (1) drives the vertical wind wheel driving gear set of the wind wheel conversion mechanism (5) to generate power, and the horizontal wind wheel (2) drives the horizontal wind wheel driving gear of the wind wheel conversion mechanism (5) to generate power.

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