Pitch varying mechanism for horizontal shaft ocean current energy generator

Abstract

The invention belongs to the field of new energy generation, in particular relates to a pitch varying mechanism for a horizontal shaft ocean current energy generation. The pitch varying mechanism comprises a first group of driving mechanisms, and multiple groups of implementing mechanisms placed in a hub, wherein the driving mechanism comprises a power mechanism, a shaft joint, a first gear shaft and a first gear; all the implementing mechanisms of the variable pitch mechanism are the transmission mechanisms comprising a second gear, a second gear shaft, a worm and worm wheel. The power mechanism is fixed in a primary shaft of an impeller; an output shaft of the power mechanism passes through the wall of the hub to extend into the hub; the first gear shaft, the first gear, the second gear, the second gear shaft, the worm and the worm wheel are orderly driven to act by the power mechanism, so that the pitch of the blade can be varied. In the invention, the structure that the power mechanism of the driving mechanism is arranged in the primary shaft is adopted to save the space in the hub; the worm wheel and the worm can be locked by self, so that the feathering of the blade can be carried out by the effect of the steam without extra limiting device.

Description

technical field [0001] The invention belongs to the field of new energy power generation, and in particular relates to a pitch-variable mechanism of a horizontal-axis ocean current energy power generation device. Background technique [0002] The relative shortage of traditional fossil energy and environmental pollution have made the development and utilization of renewable energy more and more important. Ocean current energy is a renewable energy with abundant reserves. Ocean current energy has the advantages of high energy density and strong predictability. The horizontal axis ocean current energy power generation device is a device that generates electricity by capturing the kinetic energy of seawater flow. The variable pitch mechanism is the key technology of the horizontal axis ocean current power generation device. The pitch variable mechanism mainly has the following functions: First, the pitch angle of the blades can be adjusted through the pitch variable mechanism, ...

AI Technical Summary

Problems solved by technology

Judging from the reports on the existing pitch mechanism of the current new energy development and utilization equipment, the pitch mechanism can be summarized into the following categories: 1. Electric pitch mechanism: each blade is controlled by an electric motor and a speed reducer. The pitch-changing mechanism composed of the gear box adjusts the pitch angle of the blades. This pitch-changing structure is more suitable for independent pitching, but requires a large inner space of the hub, and the pitch-changing mechanism will suffer from increased weight. The load of the main shaft is also relatively large, and this structure is not suitable for small and medium-sized horizontal axis ocean current energy generating devices; 3. Rack and pinion mechanism: The pitch actuator of this mechanism is relatively simple, but its driving device (such as a hydraulic cylinder) is not easy to install, and it is still difficult to install during the pitch change process. The problem of how to limit the blade should be considered to prevent the blade from feathering under the action of water flow (feathering means that the pitch angle of the blade changes to reduce the lift of the blade)

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