Single-frame impeller of wind power generator

Abstract

The invention relates to the technical field of wind power generating equipment, in particular to a single-frame impeller of a wind power generator. Due to the influence of structure and materials, the existing horizontal-axis wind turbines have problems such as low utilization rate of wind energy, high design requirements of the whole machine, large volume and weight, difficult maintenance and repair, and easy speeding. The invention includes a wind rotor frame, a blade adjustment device, a support seat, and an inclined support rod. The blade adjustment device and the support seat are connected and assembled on the front end of the main shaft of the generator. The wind wheel frame and the support seat are connected through an inclined support rod, and the blades surround the blade adjustment device. The shaft is assembled in the frame of the wind wheel; the blade adjustment device is provided with a closed adjustment chamber, and the adjustment chamber is equipped with a gear type or a connecting rod type adjustment mechanism. The invention increases the number of blades by changing the connection mode of the blades, improves the utilization efficiency of wind energy, increases the output power of the whole machine, reduces the volume, height and weight of the fan, has a reasonable structure, and is convenient for daily maintenance and repair.

Description

technical field [0001] The invention relates to the technical field of wind power generating equipment, in particular to a single-frame impeller of a wind power generator. Background technique [0002] Wind power generators use natural wind energy to drive the blades and the main shaft of the generator to rotate, and drive the rotor of the motor to rotate to generate electricity. It has the characteristics of environmental protection and has been widely used. [0003] At present, most wind turbines are in the form of three driving blades with the main shaft horizontally arranged. Fans with this structure usually rely on increasing the length of the blades, that is, increasing the sweeping area of ​​the blades and increasing the rated output power. Therefore, while increasing the power of the fan, its The overall volume, height, and weight also increase accordingly. The higher body height increases the overall shaking, resulting in a decrease in wind resistance, and greatly i...

AI Technical Summary

Problems solved by technology

[0003] At present, most wind turbines are in the form of three driving blades with the main shaft horizontally arranged. Fans with this structure usually rely on increasing the length of the blades, that is, increasing the sweeping area of ​​the blades and increasing the rated output power. Therefore, while increasing the power of the fan, its The overall volume, height, and weight also increase accordingly. The higher body height increases the overall shaking, resulting in a decrease in wind resistance, and greatly increases the design requirements for the structure, strength, and materials of the entire machine, especially the blade angle adjustment mechanism. It is complicated, and the angle adjustment of each blade is asynchronous, which increases the cost of production, operation and daily maintenance. At the same time, it makes the fan more sensitive to the wind speed, and the available range of wind speed is narrowed (when the wind speed is greater than 25m / s, it is generally shut down to avoid danger), Causes a lot of waste of wind power resources, the cost of obtaining unit kilowatts of electric energy rises, and there are generally problems of large investment in wind power equipment, long cost recovery cycle, and low annual utilization hours

However, civil wind turbines are limited by their cost and structure, the angle of the blades cannot be adjusted, and the failure of the wind wheel to overspeed and "speeding" is common.

In addition, the fan blades of this structure are limited by materials and structures. During operation, especially in thunderstorm weather, the probability of breaking the blades due to lightning strikes is high.

[0004] In addition, patent No. ZL 201420077847.5 discloses a horizontal-axis wind turbine with door-shaped blades and a retractable wind rotor, and ZL 201420078001.3 discloses a horizontal-axis wind turbine with paddle-shaped blades and a drum-shaped retractable wind rotor. It solves the problems of blade synchronization and fan size reduction, but because the wind wheel structure is two to three circular frames and multiple support rods, the weight of the head part of the whole machine has not been reduced, especially the adjustment mechanism of the blades. Using the method of setting grooves on the frame and pulling them with steel ropes, the structure is complex, corrosion resistance, daily maintenance, and repairs are difficult, and the friction loss between the steel ropes and the frame grooves is relatively large, resulting in unsatisfactory overall operation and unit power generation costs

Images