Variable-pitch mechanism of tidal current energy electricity generation water turbine

Abstract

The invention discloses a variable-pitch mechanism of a tidal current energy electricity generation water turbine. The variable-pitch mechanism comprises a variable-pitch hub, a bevel gear wheel, bevel pinions, a blade shaft and blades; one end of the variable-pitch hub is connected with a speed reducer and a drive motor in sequence, and the speed reducer and the drive motor are arranged in an outer cover; the other end of the speed reducer is connected with the bevel gear wheel, and the bevel gear wheel is meshed with at least two of the bevel pinions; the blade shaft is arranged on the variable-pitch hub and can rotate by means of the rotation of the bevel pinions; the blades are arranged on the blade shaft. The variable-pitch mechanism of the tidal current energy electricity generation water turbine has the advantages that the drive motor and the speed reducer are installed at the front end of the variable-pitch hub, therefore, the structural size of the variable-pitch hub is effectively reduced, and the structure is compact; moreover, the outer cover of the water turbine adopts a streamlined design, therefore, the impact of water flow in the forward direction is effectively reduced, and the water turbine is safe and reliable; the mechanism of the drive motor and the speed reducer is adopted, therefore, accurate and reliable control over pitch angles is realized, large torque can be output, and synchronous pitch variation is facilitated.

Description

technical field [0001] The invention relates to a pitch-variable mechanism of a tidal current energy generating water turbine. Background technique [0002] As a clean and renewable energy source, ocean tidal current has little impact on the environment and is rich in resources. At present, research and investment in tidal current power generation technology are increasing in countries all over the world. A tidal current power generation device is a commonly used equipment that uses ocean tidal current energy to generate electricity. The tidal current power generation device usually uses a water turbine to generate power. The ocean current drives the blades in the water turbine to drive the hub to rotate, and the rotating hub drives the generator in the nacelle to rotate to generate electricity. However, when the speed of the ocean current flow is low, it will cause the turbine in the tidal current power generation device to be difficult to start and even fail to generate el...

AI Technical Summary

Problems solved by technology

However, when the speed of the ocean current flow is low, it will cause the turbine in the tidal current power generation device to be difficult to start and even fail to generate electricity; Power generation under the condition of high energy harvesting efficiency; when the flow direction of the ocean current changes by 180°, the angle of the hub blades cannot meet the requirements of high-efficiency power generation without changing the direction of the turbine

Therefore, the tidal current power generation device in the prior art is easily affected by the environment, resulting in low power generation efficiency

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