Experimental testing device for mechanical properties of horizontal axis composite wind turbine blades

Abstract

The invention discloses experimental testing equipment for the mechanical property of a horizontal axis composite wind turbine blade, and mainly relates to the field of mechanical testing equipment. The experimental testing equipment comprise a base, a horizontal correcting platform and a locating car; the bottom of the base is a fixing seat, and the upper part of the base is a mounting seat; themounting seat is provided with a mounting flange, and a blade is fixed to the mounting flange by a bolt; the horizontal correcting platform is fixed to the same side, as the mounting flange, of the fixing seat, and provided with a ranging module used for detecting the distance between the locating car and the horizontal correcting platform; the locating car comprises a horizontal platform, a pedestal and an adjusting rack, and the centroid of the top surface of the horizontal platform is fixedly provided with a laser level; the pedestal is fixedly connected with the horizontal platform throughthe adjusting rack, and the both sides of the horizontal platform are each provided with a horizon dial; and the two horizon dials are on the same plane, and the distance between the centers of the horizon dials is equal to the distance between the distance measuring ports of two laser range finders. The experimental testing equipment has the beneficial effect that the laser beam can be projectedto the blade at the specified distance for location.

Description

technical field [0001] The invention relates to the field of performance testing of fan blades, in particular to an experimental testing device for the mechanical performance of horizontal axis composite material wind turbine blades. Background technique [0002] Wind turbine blades are mostly made of glass fiber fabrics and epoxy resin composites. Since composite blades are formed by multiple layers of glass fiber fabrics, their mechanical properties are anisotropic. The mechanical properties of the blade depend on the layering method of the glass fiber fabric and the arrangement of the fiber components in the fabric. The deformation of the blade is small before it is damaged by the load, and the composite blade reinforced by glass fiber fabrics with different structures will attach strain on the blade surface when performing the static load test of the blade, the vibration step response test of the blade and the destructive test of the static strength of the blade. The de...

AI Technical Summary

Problems solved by technology

The deformation of the blade is small before it is damaged by the load, and the composite blade reinforced by glass fiber fabrics with different structures will attach strain on the blade surface when performing the static load test of the blade, the vibration step response test of the blade and the destructive test of the static strength of the blade. The deformation of the position of the strain gauge is reflected by the resistance change of the strain gauge, and the accuracy of the experiment needs to be improved through repeated experiments. In addition, the position deviation when the strain gauge is pasted will also affect the accuracy of data analysis.

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