Blade for narrow pipe wind gathering type wind power generation device

Abstract

A blade for a narrow pipe wind gathering type wind power generation device comprises an installing section, a continuous working section and an outer working section, wherein the installing section extends towards the blade apex portion from the blade root portion in the blade spacing direction, the continuous working section is connected between the installing section and the outer working section in a smooth mode, the wing profiles of the three sections are round pointed asymmetric wing profiles, and the upper cambered surfaces and the lower cambered surfaces of the back edges of the wing profiles of the three sections are connected through smooth circular curves. The blade profile of the installing section is a twisted uniform-section blade profile, the blade profile of the continuous working section and the blade profile of the outer working section are twisted variable section blade profiles, the twisted directions of the three sections are the same, the back edges of the wing profiles are twisted towards the blade surface direction relative to the front edges of the wing profiles, and the twisted angle of the outer working section is larger than or equal to that of the continuous working section; the shape of the blade gradually becomes narrower from the blade apex portion to the transition connecting position between the installing section and the continuous working section, and the thickness of the sections of the blade gradually become larger from the front edges of the wing profiles to the back edges of the wing profiles. The blade conforms to the characteristics of fluid in a gradually shrinking type limited sealing body and meets the requirement for kinetic energy conversion.

Description

technical field [0001] The invention relates to the technical field of wind power generation equipment, in particular to a blade used in a narrow tube of a wind gathering type wind power generation device. Background technique [0002] The wind-gathering wind turbine generated according to the narrow tube effect, because the wind-gathering wind generator sets the air inlet as a narrow tube, compared with the traditional horizontal-axis wind turbine and vertical-axis wind turbine , has the advantages of gathering wind energy, increasing pressure and increasing speed, and improving the utilization rate of wind energy. Therefore, it has broad application prospects in the field of wind power generation technology. It is precisely because of the setting of the narrow tube in the wind gathering type wind power generator that the narrow tube is a shrinking limited sealing body. Therefore, the blade, which is the core component of converting wind energy into mechanical energy in the...

AI Technical Summary

Problems solved by technology

It is precisely because of the setting of the narrow tube in the wind gathering type wind power generator that the narrow tube is a shrinking limited sealing body. Therefore, the blade, which is the core component of converting wind energy into mechanical energy in the process of wind power generation, is in the shrinking type. Work is done in the finite seal body, and there are air flow characteristics such as the change of work with the change of air flow velocity, the change of work point, the synchronization degree of the impeller and the generator, etc. in the shrinking finite seal body. As far as various propeller components are concerned, none of them can be directly applied to the narrow-tube wind power generation system, such as the "horizontal axis wind turbine wind wheel" disclosed in Chinese patent CN101619709A, the disclosed blades are elongated A rectangular plate, or a trapezoidal plate, or a plate with a circular arc-shaped edge in the middle of the two narrow ends, and "a protruding horizontal axis wind turbine blade" disclosed in Chinese patent CN202209250U. The disclosed blades include cylindrical Blade roots and blade spans arranged in a certain sequence of attack angles, and the blades protrude forward in the direction of the leading edge. These blade structures are not suitable for narrow tube wind concentrating power generation systems

Most of the patent documents related to narrow tube wind gathering power generation technology mainly focus on the main structure of the power generation system as the main protection object, and few of them involve special blades that are compatible with the technology. Judging from the accompanying drawings of the patent specification, it is also The turboprop-type blades with a small number of blades are mainly installed. For example, the wind power generation device disclosed in Chinese patent ZL201220394391.6 is "a self-starting narrow tube wind power generation system". Turtle-back blades are used in the tube power generation system. However, there is no specific description of the specific shape and geometric parameters of the turtle-back blades. Therefore, we have no way of knowing what a turtle-back blade is and how effective it is. Know

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