Integrated tidal current energy power generation device and tidal current energy unit comprising same

Abstract

The invention discloses an integrated tidal current energy power generation device and a tidal current energy unit comprising the same and belongs to the field of tidal current energy units. The powergeneration device is an outer rotor motor and comprises a hollow shaft provided with a stator and a machine base provided with a rotor, the machine base rotates relative to the hollow shaft and drives the rotor to rotate, the rotor and the stator are matched to generate power, the machine base is connected with the hollow shaft in a sealed mode, and a sealed waterproof space is formed between themachine base and the hollow shaft. At least three damping type blades are installed on the machine base in a surrounding mode, each damping type blade comprises a damper and a blade body connected with the damper, and the passive variable pitch of the blades is achieved through rotation resistance generated by the dampers. By the adoption of the outer rotor motor, the damping type blades and a yaw-free system, passive pitch changing and two-way tidal current energy absorption are achieved through damping type mechanical passive pitch changing of the damping type blades, the structure is simple, the impeller strength is high, the unit structure is simple, the complexity of the pitch changing system is low, and two-way ocean current utilization power generation can be achieved without a yawsystem.

Description

technical field [0001] The invention relates to the field of tidal current energy units, in particular to an integrally integrated tidal current energy generating device and a tidal current energy unit including the same. Background technique [0002] At present, with the gradual deepening of marine energy development, various equipment using ocean tidal current energy to generate electricity emerge in an endless stream. At present, bidirectional tidal current energy generation has gradually become the main research and development direction of power generation equipment in this industry. The existing equipment is divided into multiple subsystems according to the functional requirements to realize the capture of bidirectional tidal current energy. Generally, the combination of 90°pitch function and yaw system is adopted, and there is also a method without yaw but the blades of the pitch system have 180°~360°pitch function. [0003] However, the marine environment is differe...

AI Technical Summary

Problems solved by technology

[0004] The blades of existing tidal current energy generators mostly adopt the airfoil design similar to the hydrodynamic structure in the wind power industry, and the production cost is relatively high

At the same time, in order to achieve blade rotation and pitch change and ensure that the blade root has sufficient strength, the diameter and wall thickness of the blade root are often designed to be large, resulting in a large amount of special underwater rotary sealing device, resulting in a large cost of the tidal current energy generator set Amplitude increase

[0005] In addition, the existing unit pitch system includes motors, pitch bearings, frequency converters, blade angle measuring devices and other components. Serious threat to pitch system reliability

[0006] Due to the cost and maintenance difficulty caused by the above-mentioned defects of the existing units, often even if the prototype is successfully developed, it cannot be transferred to mass production, and cannot meet the ever-increasing demand in the field of ocean tidal current energy generation in the future.

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