Vertical axis straight blade lifting wind wheel with speed-limiting device
A speed-limiting device, lift-type technology, applied to wind turbines at right angles to the wind direction, wind turbines, wind turbine control and other directions, can solve damage, limit the speed and power output of the wind rotor, and cannot use the horizontal axis pitch control for reference Technology and other issues, to achieve the effect of efficient and safe operation, and enhance the ability to adapt to harsh environments
Inactive Publication Date: 2011-12-14
HOHAI UNIV +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When operating under strong wind or encountering a strong wind environment, the speed of the vertical axis wind rotor is also faster. If the speed of the vertical axis wind rotor is not limited at this time, firstly, the generator cannot run efficiently, and secondly, it is easy to cause the wind turbine to be overloaded and damaged
[0004] However, the speed limiting technology of vertical axis wind turbines has always been a difficult problem to solve
Due to the influence of the structure, the vertical axis wind rotor cannot learn from the pitch control technology of the horizontal axis, or adopt the stall design of the blade, or adopt the active stall control technology to limit the speed and power output of the wind rotor
Therefore, if there is no special control on the vertical axis wind rotor, the vertical axis wind rotor cannot operate under strong wind conditions, and the vertical axis wind rotor can theoretically operate at a wind speed of 25-45m / s (the horizontal axis can only operate at a wind speed of less than 25m / s) The advantages of operating in strong winds cannot be realized in practice
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The present invention will be described in detail below in conjunction with the drawings. Such as figure 1 As shown, the power-controllable lift-type vertical axis wind turbine device of the present invention includes a wind wheel shaft 1, on which two or more lift-type blades 2, a cylindrical outer cover 3, a damping blade 4, The damping blade connecting rod 5, the damping blade offset guide plate 6, the spring 7 and the roller 8 constitute a speed limiting device.
[0029] Such as figure 2 As shown, the damping blades 4 are symmetrical with each other, the bottom end is connected with the shaft, the offset direction and angle are limited by the offset guide plate 6, and the connecting end and the guide plate 6 are used to transmit the damping torque.
[0030] image 3 Shown are two closed damping blades 2, which are designed for mass misalignment. The mass of one side is significantly larger than that of the other side. Centrifugal force is generated at high speed, thereb...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a speed-limiting device for a lifting vertical axis wind wheel, which comprises a wind wheel shaft and two or more than two lifting blades arranged on the wind wheel shaft; and a set of speed-limiting device is also arranged on the top of the wind wheel shaft. A damping blade in the speed-limiting device can deviate under the action of centrifugal force and generate the damping action to restrain the rotate speed of the wind wheel from increasing. When the rotate speed is higher, the deflection of the damping blade is larger and the generated damping moment is larger, so the rotate speed is restrained effectively from increasing at a high wind speed, so that the wind wheel continues running with high efficiency and at the high wind speed, the overload running of the wind wheel is protected, and the advantage that the vertical axis wind wheel can run at the wide wind speed is shown in a real sense.
Description
Technical field [0001] The invention relates to the technical field of a lift-type vertical-axis wind turbine, in particular to a vertical-axis straight blade lift-type wind wheel with a speed-limiting device. Background technique [0002] At present, the wind collectors of most wind turbines are horizontal-axis wind wheels. The horizontal axis wind wheel adopts lift-type blades, the speed is relatively fast, and the tip speed ratio of the three-blade horizontal axis wind wheel is about 5-6. The tip speed ratio indicates the ratio of the linear velocity of the blade to the incoming wind speed. The tip speed ratio is 5-6, which indicates that the wind wheel rotates faster. However, under strong winds, the horizontal axis wind wheel can be well controlled to run at the rated speed through a stall phenomenon or a variable pitch or speed regulating device, thereby limiting the power output of the horizontal axis wind wheel under high winds and protecting the wind turbine from overl...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): F03D3/06F03D7/06
CPCY02E10/74
Inventor赵振宙郑源范江山丁琳陈冷刘立群刘军峰
OwnerHOHAI UNIV