Support arm installation structure for vertical axis wind wheel, and vertical axis wind wheel

Abstract

A support arm installation structure for a vertical axis wind wheel, in which a load and stress acting on joint sections between hubs and support arms of or joint sections between blades and the support arms of the wind wheel are dispersed to eliminate excessive stress concentration, thereby vibration and fretting corrosion etc. on the joint surfaces can be reduced. For example, the installation structure of the vertical axis wind wheel has a support arm (20) for holding blades (18) of the vertical axis wind wheel producing rotational torque and having a streamlined cross-sectional shape and has hubs (80, 81) on which support arm fixing sections (86) are radially arranged and which fix the support arms (20) by pressing them, the support arm fixing sections (86) being positioned on the rotating shaft side of a rotating body of the vertical axis wind wheel (10) and each having a section with the same shape as the outer shape of a support arm (20).

Description

technical field [0001] The present invention relates to a support structure for a rotating part of a vertical axis windmill, a rotation torque transmission structure, and a vertical axis windmill equipped with the structure. Background technique [0002] Conventionally, there is known a windmill for power generation in which a plurality of horizontal wings are used as support arms (or pillars) for supporting the blades of a vertical-axis egg-beating (Dariusu) type windmill, and the front end of each horizontal wing is directed upward at right angles. The side or the bottom extends as a vertical axis inner peripheral side component, which forms an airfoil vertical blade by overlapping and joining with the outer peripheral side component of the vertical blade, and is supported by the above-mentioned horizontal wing integrally structured with the above-mentioned inner peripheral side component blade. [0003] The windmill wing for power generation can fully ensure the bonding ...

AI Technical Summary

Problems solved by technology

[0007] The windmill blade for power generation described in Patent Document 1 fully ensures the joint strength of the vertical blade and the horizontal blade, and eliminates the need for various connecting parts that increase the air resistance at the contact portion of the vertical blade and the horizontal blade. However, there is a problem that , since the horizontal wing and the vertical wing are integrated, the joining method of the bending part from the horizontal to the vertical is difficult, and stress concentration occurs at the joining part

[0008] And there is the following problem, because the above-mentioned wind turbine blades for power generation have the same shape as the vertical blade and the horizontal blade, so the horizontal blade also needs to be a very large blade with the same shape as the vertical blade, which increases the air resistance loss and increases the manufacturing cost, and the rotating body The increase in the overall mass deteriorates the balance of the windmill and becomes the cause of vibration

[0009] In addition, there is a problem that since the above-mentioned windmill blades for power generation are integrated with the vertical blades and the horizontal blades, modification such as making the horizontal blades and the vertical blades different shapes cannot be performed

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