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Symmetric ocean current power generation device with single impeller and high length-diameter ratio

A large length-to-diameter ratio, sea current power generation technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of increased blade load impact, increased volume radial size, blade waving and vibration, etc., to achieve Reduce the blocking effect, reduce the cross-sectional area, reduce the effect of shock and vibration

Active Publication Date: 2016-07-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the power of the unit rises to the megawatt level, the volume of the power generation device, especially the radial dimension, will inevitably increase, resulting in more serious problems with flow blocking and flow field characteristics, resulting in an increase in the load impact on the blades, which is very easy to occur Blade flapping and chattering problems, even bending or breaking
At the same time, when the unit rises to a high power level, the requirements for the power capacity of the transmission chain (gearbox) and the generator are also greatly increased, resulting in an increase in cost

Method used

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  • Symmetric ocean current power generation device with single impeller and high length-diameter ratio
  • Symmetric ocean current power generation device with single impeller and high length-diameter ratio
  • Symmetric ocean current power generation device with single impeller and high length-diameter ratio

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Experimental program
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Effect test

Embodiment 1

[0021] refer to figure 1 , The device includes a shroud 1, a generator 2, a transmission gearbox 3, an impeller hub 4, a main shaft 5, impeller blades 6, and an electrical parallel balance output device 7. A symmetrical structure is adopted, symmetrical to the center line of the impeller hub 4, and the transmission gearbox 3, the generator 2 and the shroud 1 are respectively arranged on both sides.

[0022] Compared with the traditional unilateral structure, this symmetrical structure can use the existing two sets of similar devices to increase the power and "length-to-diameter ratio" by about one time (the blades increase accordingly), effectively reducing the ineffective flow blocking area and optimizing the two-way flow. Field characteristics, and effectively realize power splitting, reducing the specifications, performance and power requirements of the transmission gearbox 3 and the generator 2, thereby reducing design and manufacturing costs. Moreover, balancing the axia...

Embodiment 2

[0028] refer to image 3 , is a special case of Embodiment 1, the number of blades of the impeller blades 6 is 2, which is convenient for batch transportation and hoisting of the impeller blades.

Embodiment 3

[0030] It is basically the same as Embodiment 1, except that the two-way blade fixed propeller is adopted at the middle hub, so that the structure is simplified and the cost is saved under the premise of ensuring two-way tidal current power generation.

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PUM

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Abstract

The invention discloses a symmetric ocean current power generation device with single impeller and a high length-diameter ratio. The device adopts a single-impeller symmetric structure; two sets of transmission and power generation systems are respectively arranged at two ends of an impeller hub; the transmission and power generation systems mainly consist of guide covers, and generators and transmission gear boxes mounted in the guide covers; the two sets of transmission and power generation systems are symmetrically distributed about the impeller hub; the impeller hub is connected with the transmission gear boxes by main shafts; output ends of the transmission gear boxes are connected with the generators; impeller blades are mounted on the peripheral surfaces; and output cables of the generators of the two sets of transmission and power generation systems are connected with synchronization or load devices by electric parallel balance output devices. The device optimizes the two-way flow field characteristics, realizes the power dividing, effectively reduces the specification performance requirements on the transmission and power generation systems under the same power, decreases the design and manufacturing costs, effectively improves the stress condition of a horizontal-axle ocean current power generation device, improves the operation stability, and prolongs the service life.

Description

technical field [0001] The invention belongs to the field of new energy power generation, and in particular relates to a single-impeller symmetrical ocean current power generation device with a large length-to-diameter ratio. Background technique [0002] In the 21st century, traditional petrochemical resources are becoming increasingly exhausted, energy crisis, and environmental pollution problems have emerged, prompting people to focus their research on the development and utilization of new energy. As a clean and renewable energy, ocean current energy has the advantages of large reserves, wide distribution, strong periodicity and high energy density, and has gradually become a focus of new energy technology research and development. In the field of research and application of ocean current energy generation devices, there are traditional dams that use tidal power generation, and vertical axis ocean current energy generation devices. From the perspective of cost and energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B13/12
CPCF03B13/12F05B2220/706
Inventor 李伟顾亚京顾海港刘宏伟林勇刚
Owner ZHEJIANG UNIV
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