Wind turbine flap pneumatic driving mechanism

Abstract

The invention discloses a pneumatic driving mechanism for a flap of a wind turbine. The pneumatic driving mechanism comprises a storage tank, a controller, a butterfly valve, a connecting pipe, an oval frame, an air cylinder, a driving rod, a reset spring, a gear, a rack and a gear shaft. The storage tanks are connected with the air cylinder through connecting pipes and butterfly valves, potassium nitrate and sodium azide are stored in the two storage tanks respectively, and when the sensor detects that the surface load of the wind turbine reaches a specified value, the controller controls the two butterfly valves to be opened at the same time; potassium nitrate and sodium azide in the storage tank enter the air cylinder to react to generate nitrogen to drive the two driving rods to move reversely, the driving rods move to enable the oval frame to deform, then the gear is driven by the rack to rotate, and then the gear shaft drives the flap to deflect. After the flap is driven, a reset spring in the air cylinder pushes the driving rod to move towards the center of the air cylinder to enable the oval frame to restore to the original shape, and the flap is driven to deflect to restore to the original shape after transmission of the gear and the rack. The flap is driven to deflect in a pneumatic reaction mode, compared with a traditional piezoelectric stack driver, the oval frame can generate larger deformation, the deflection angle of the flap is larger, and meanwhile the driver is driven by nitrogen and is more environmentally friendly.

Description

technical field [0001] The invention relates to an aerodynamic driving mechanism, which is mainly used for driving the blade flaps of intelligent wind turbines. Background technique [0002] Wind turbines have been widely used as clean energy in recent years. With the intensification of the fossil energy crisis, wind energy will be further developed in the future. Compared with the vertical axis wind turbine, the horizontal axis wind turbine has a higher utilization rate of wind energy, and the large-scale promotion of the horizontal axis wind turbine also promotes the maturity of its technology. [0003] The rapid development of the wind power industry has also led to the gradual enlargement of wind turbine blades. However, the increase in blade length makes flexible blades more susceptible to dynamic loads and random wind gusts during operation. Active aerodynamic load control is gradually applied in order to realize the rapid reduction of the blade's alternating load. Th...

AI Technical Summary

Problems solved by technology

At present, conventional blade flap drive amplification mechanisms mostly use piezoelectric stacks to drive, but due to factors such as the manufacturing process of piezoelectric materials, the driving capability of piezoelectric stacks is limited, and the driving capability of amplifiers is unstable due to the hysteresis characteristics of piezoelectric materials.

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