Vertical axis wind power generation device

Abstract

The utility model provides a vertical shaft wind power generation device which comprises a main shaft, the lower end of the main shaft is connected with a generator, a rotating frame is fixed on the main shaft, a blade rotating shaft is arranged on the rotating frame, and blades are fixed on the blade rotating shaft. A wind-facing driven wheel is arranged at the lower end of the blade rotating shaft, the lower end of the main shaft is sleeved with a wind-facing transmission gear and a wind-facing driving wheel, the wind-facing transmission gear and the wind-facing driving wheel can rotate around the main shaft, the wind-facing transmission gear and the wind-facing driving wheel are fixedly connected, and the wind-facing driving wheel and the wind-facing driven wheel are synchronously connected. A wind aligning device used for driving the wind aligning transmission gear to rotate is arranged on one side of the wind aligning transmission gear. The wind direction sensor has the advantages that the wind direction is sensed through the wind indicator, when the wind direction changes, the wind aligning device drives the blades through the transmission mechanism to automatically adjust the angle so that the blades can be in the best windward state all the time, and the wind energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a wind power generation device, in particular to a vertical axis wind power generation device. Background Art

[0002] In order to better utilize wind energy, people have designed wind power generation devices of various structures for a long time. According to the different positions of the rotating axis of the wind turbine in the spatial direction, it can be divided into horizontal axis wind turbines and vertical axis wind turbines.

[0003] Generally speaking, the wind rotor of a vertical axis wind turbine is composed of blades with a certain wing shape, and the blade axis is parallel to the vertical axis. The wing shape of the blade can be designed based on existing aerodynamic principles. According to the principles of aerodynamics, the line connecting the leading and trailing edges of the blade is called the chord line, and the angle between the chord line of the blade and the tangent line at a certain position on the circumference is set as the rotation angle. These blades are generally fixedly mounted on an annular cantilever that rotates around a vertical axis and cannot rotate relative to the cantilever, and the blade rotation angle is fixed. When wind of a certain intensity blows on these straight blades with a certain wing shape and a certain angle with the tangent line of the rotation axis, a torque rotating around the vertical axis is generated on these blades to rotate the entire wind rotor.

[0004] According to the principles of aerodynamics, the angle between the chord formed by the center of the leading edge and the trailing edge of the blade and the wind direction is called the angle of attack. During the rotation process, the angle of attack of the blade is constantly changing due to the constant change in the position of the blade relative to the circumference. When the blade is at different positions during the rotation process, the size and direction of the driving torque generated by the blade are constantly changing due to the change in the blade angle of attack, thereby generating different torques. In some positions, a larger torque is generated; in other positions, a smaller torque is generated; and in some positions, a drag torque is generated. When the blade is at different positions during the rotation process, the blade angle is fixed. Due to the constant change in the size and direction of the driving torque generated by the blade, the existing wind rotor with fixed blades cannot avoid the negative impact of the drag torque, which is the main factor affecting the wind energy conversion efficiency of the vertical axis wind turbine. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a vertical axis wind power generation device, aiming at improving the efficiency of wind power generation.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a vertical axis wind power generation device, comprising a main shaft, the lower end of the main shaft is connected to a generator, a rotating frame is fixed on the main shaft, the rotating frame is provided with a blade rotating shaft, and blades are fixed on the blade rotating shaft; a wind driven wheel is provided at the lower end of the blade rotating shaft, and a wind transmission gear and a wind driving wheel are sleeved on the lower end of the main shaft, the wind transmission gear and the wind driving wheel can rotate around the main shaft, the wind transmission gear is fixedly connected to the wind driving wheel, the wind driving wheel and the wind driven wheel are synchronously connected, and a wind device for driving the wind transmission gear to rotate is provided on one side of the wind transmission gear.

[0007] Furthermore, the wind-facing device includes a wind vane, a wind-facing drive motor and a wind-facing drive gear; the wind-facing drive gear is arranged on the output shaft of the wind-facing drive motor, the wind-facing drive gear is meshed with the wind-facing transmission gear, and the wind-facing drive motor is used to adjust the angle of the blades in real time according to the direction change of the wind vane.

[0008] Furthermore, the transmission ratio between the wind vane and the wind transmission gear is 1.

[0009] Furthermore, the transmission ratio between the wind-facing driving wheel and the wind-facing driven wheel is 2.

[0010] Furthermore, there are at least two blades, and the angles between adjacent blades are the same.

[0011] Furthermore, the blades are flat-plate shaped.

[0012] Furthermore, the wind-facing driving wheel and the wind-facing driven wheel are connected via a synchronous belt.

[0013] Furthermore, the wind transmission gear and the wind driving wheel are respectively sleeved and fixed on a sleeve, the sleeve is sleeved on the lower end of the main shaft, and the sleeve can rotate around the main shaft.

[0014] The beneficial effect of the utility model is that compared with the wind turbine with fixed blade angle adopted in the prior art, the utility model can automatically adjust the blade to the optimal angle of attack at different positions on the circumference, so that the blade can continuously generate positive torque to drive the main shaft to rotate during the revolution, thereby improving the wind energy conversion efficiency. The wind power generation device provided by the utility model senses the wind direction through the wind vane. When the wind direction changes, the wind device drives the wind rotor blades to automatically adjust the angle through the transmission mechanism so that the blades are always in the best windward state at different positions, which can overcome the situation that the blades of traditional wind turbines are doing negative work at certain positions. Therefore, the wind energy utilization rate of the utility model is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the mechanisms shown in these drawings without paying creative work.

[0016] Figure 1 This is a structural diagram of a vertical axis wind power generation device according to an embodiment of the utility model;

[0017] Figure 2 This is a wind transmission structure diagram of an embodiment of the utility model;

[0018] Figure 3 A diagram showing the windward angle of the blade at various positions during the rotation process of an embodiment of the utility model;

[0019] Among them, 10, main shaft; 11, upper cantilever; 12, lower cantilever; 13, blades; 14, blade rotating shaft; 15, wind driven wheel; 16, synchronous belt; 20, wind transmission gear; 21, wind driving wheel; 22, sleeve; 30, wind driving motor; 31, wind driving gear; 32, generator; 33, wind vane. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0022] like Figure 1 , Figure 2As shown, an embodiment of the utility model is: a vertical axis wind power generation device, comprising a main shaft 10, the lower end of the main shaft 10 is connected to a generator 32, a rotating frame is fixed on the main shaft 10, a blade rotating shaft 14 is provided on the rotating frame, and blades 13 are fixed on the blade rotating shaft 14; a wind driven wheel 15 is provided at the lower end of the blade rotating shaft 14, a wind transmission gear 20 and a wind driving wheel 21 are sleeved on the lower end of the main shaft 10, the wind transmission gear 20 and the wind driving wheel 21 can rotate around the main shaft 10, the wind transmission gear 20 is fixedly connected to the wind driving wheel 21, the wind driving wheel 21 is synchronously connected to the wind driven wheel 15, and a wind device for driving the wind transmission gear 20 is provided on one side of the wind transmission gear 20.

[0023] The wind driving wheel 21 and the wind driven wheel 15 are connected via a synchronous belt 16. Alternatively, the wind driving wheel 21 and the wind driven wheel 15 can also be connected and driven via a transmission shaft.

[0024] Among them, the rotating frame includes an upper cantilever 11 and a lower cantilever 12; the center of the upper cantilever 11 is fixed at the upper end of the main shaft 10, and the center of the lower cantilever 12 is fixed at the lower end of the main shaft 10; the upper and lower ends of the blade rotating shaft 14 pass through the two ends of the upper cantilever 11 and the lower cantilever 12 respectively; the blade rotating shaft 14 can rotate relative to the upper cantilever 11 and the lower cantilever 12.

[0025] In a specific embodiment, the wind-facing device includes a wind vane 33, a wind-facing drive motor 30 and a wind-facing drive gear 31; the wind-facing drive gear 31 is arranged on the output shaft of the wind-facing drive motor 30, the wind-facing drive gear 31 is meshed with the wind-facing transmission gear 20, and the wind-facing drive motor 30 is used to adjust the angle of the blade 13 in real time according to the direction change of the wind vane 33.

[0026] In this embodiment, the wind device controls the wind vane 33 and the wind transmission gear 20 to maintain a constant rotation angular velocity and phase. The wind direction change is tracked in real time by the wind vane 33. When the wind direction changes, the wind driving gear 31 is driven to rotate by the wind vane 33 and the wind device, and then the wind transmission gear 20 and the wind driving wheel 21 on the sleeve main shaft 10 are driven to rotate, and then the wind driven wheel 15 is driven to rotate by the synchronous belt 16, and finally the blades 13 are driven to rotate until the blades 13 are adjusted to the optimal angle.

[0027] In a specific embodiment, the transmission ratio between the wind vane 33 and the wind transmission gear 20 is 1.

[0028] Wherein, the transmission ratio between the wind-facing driving wheel 21 and the wind-facing driven wheel 15 is 2.

[0029] In this embodiment, Figure 3As shown, when the wind direction remains unchanged, the blade 13 orbits around the main axis 10 once, and the blade 13 rotates half a circle around its own rotation axis.

[0030] In a specific embodiment, the number of the blades 13 is at least two, and the angles between adjacent blades 13 are the same.

[0031] Wherein, the blade 13 is a flat plate.

[0032] In this embodiment, the number of blades 13 can be flexibly set according to actual application scenarios.

[0033] In a specific embodiment, the wind transmission gear 20 and the wind driving wheel 21 are respectively sleeved and fixed on a sleeve 22 . The sleeve 22 is sleeved on the lower end of the main shaft 10 . The sleeve 22 can rotate around the main shaft 10 .

[0034] The beneficial effect of the embodiment of the utility model is that compared with the wind turbine with fixed rotation angle of blades 13 adopted in the prior art, the utility model can automatically adjust the blades 13 to the optimal angle of attack at different positions on the circumference, so that the blades 13 can continuously generate positive torque to drive the main shaft 10 to rotate during the revolution, thereby improving the wind energy conversion efficiency.

[0035] The wind power generation device provided by the utility model senses the wind direction through the wind vane 33. When the wind direction changes, the wind device drives the wind wheel blades 13 to automatically adjust the angle through the transmission mechanism so that the blades 13 are always in the best windward state, which can overcome the situation that the blades 13 of the traditional wind turbine are doing negative work in certain positions. Therefore, the wind energy utilization rate of the device is high. Except that when the wind direction changes, it consumes some energy to start the wind motor 30 to adjust the angle of the blades 13 to adapt to the wind direction change. When the wind direction remains unchanged, the wind motor 30 is in a stationary state and no energy is consumed.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vertical axis wind power generation device, characterized in that: It includes a main shaft, the lower end of which is connected to a generator, a rotating frame is fixed on the main shaft, a blade rotating shaft is provided on the rotating frame, and blades are fixed on the blade rotating shaft; a wind driven wheel is provided at the lower end of the blade rotating shaft, a wind transmission gear and a wind driving wheel are sleeved on the lower end of the main shaft, the wind transmission gear and the wind driving wheel can rotate around the main shaft, the wind transmission gear is fixedly connected to the wind driving wheel, the wind driving wheel and the wind driven wheel are synchronously connected, and a wind device for driving the wind transmission gear to rotate is provided on one side of the wind transmission gear.

2. The vertical axis wind power generation device according to claim 1, characterized in that: The wind-facing device includes a wind vane, a wind-facing drive motor and a wind-facing drive gear; the wind-facing drive gear is arranged on the output shaft of the wind-facing drive motor, the wind-facing drive gear is meshed with the wind-facing transmission gear, and the wind-facing drive motor is used to adjust the angle of the blades in real time according to the direction change of the wind vane.

3. The vertical axis wind power generation device according to claim 2, characterized in that: The transmission ratio between the weather vane and the wind transmission gear is 1.

4. The vertical axis wind power generation device according to claim 1, characterized in that: The transmission ratio between the windward driving wheel and the windward driven wheel is 2.

5. The vertical axis wind power generation device according to claim 1, characterized in that: The number of the blades is at least two, and the angles between adjacent blades are the same.

6. The vertical axis wind power generation device according to claim 5, characterized in that: The blades are flat plate type.

7. The vertical axis wind power generation device according to claim 1, characterized in that: The wind-facing driving wheel and the wind-facing driven wheel are connected via a synchronous belt.

8. The vertical axis wind power generation device according to claim 1, characterized in that: The wind transmission gear and the wind driving wheel are respectively sleeved and fixed on a sleeve, the sleeve is sleeved on the lower end of the main shaft, and the sleeve can rotate around the main shaft.

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