Power-increasing and efficiency-improving device for wind wheel of horizontal-axis wind turbine

Abstract

The power and efficiency increasing device comprises a main shaft, blades, a variable-pitch seat and rotating connecting shafts, the variable-pitch seat is of a cylindrical structure, the rotating connecting shafts are arranged on the outer side wall of the variable-pitch seat in the circumferential direction at equal intervals, and the rotating connecting shafts are connected with the tail ends of the blades; and the variable pitch seat is connected with a fixed seat of the wind turbine through a main shaft. Through the arrangement of the rotating connecting shaft, the angle and the rotating speed of the blades can be adjusted in real time, the purpose of changing the stress of the blades is achieved, the wind force borne by the blades can be adjusted in real time, the shaft stress of a wind wheel of a wind turbine is balanced, the vibration amplitude and the rotating resistance of the wind turbine generator are reduced, and the service life of the wind turbine generator is prolonged. Therefore, the effect of increasing power and efficiency is effectively achieved; and meanwhile, through the arrangement of the inner blades, power increasing can be effectively conducted on the wind wheel of the wind turbine, the wind receiving area of the blades is effectively enlarged, and therefore power increasing and efficiency improving are guaranteed in the rotating state.

Description

technical field [0001] The invention relates to the technical field of generator set accessories, in particular to a device for increasing power and efficiency of a horizontal axis wind turbine. Background technique [0002] When the wind turbine is in operation, the wind rotor is the main stress-bearing part, which needs to withstand relatively large wind force. The hub of the wind rotor is connected to the speed-increasing mechanism. Since the local wind force is different in magnitude and direction, each blade of the wind rotor The wind force they bear is also different, which will cause the vibration of the wind turbine, which will increase the rotational resistance. The greater the amplitude of the vibration, the greater the rotational resistance, and the lower the efficiency of power generation. However, the existing wind turbine wind The wheel cannot solve the above problems, and cannot balance the stress of each blade of the wind wheel. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] When the wind turbine is in operation, the wind rotor is the main stress-bearing part, which needs to withstand relatively large wind force. The hub of the wind rotor is connected to the speed-increasing mechanism. Since the local wind force is different in magnitude and direction, each blade of the wind rotor The wind force they bear is also different, which will cause the vibration of the wind turbine, which will increase the rotational resistance. The greater the amplitude of the vibration, the greater the rotational resistance, and the lower the efficiency of power generation. However, the existing wind turbine wind The wheel cannot solve the above problems, and cannot balance the force on each blade of the wind wheel

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