A small horizontal axis wind turbine axial trust measuring device

Abstract

The invention provides a small horizontal axis wind turbine axial trust measuring device comprising a base and a small horizontal axis wind turbine arranged at the top of the base. The small horizontal axis wind turbine comprises a horizontal input shaft, a horizontal output shaft and impellers at the front end of the horizontal input shaft; the top of the base is also provided with an optical fiber sensor; when axial thrust is applied to the horizontal input shaft, the horizontal input shaft can move backward in the axial direction; an elastic body is arranged in a hollow drum body at the front end of the horizontal output shaft; the elastic body is compressed only when the horizontal input shaft encounters axial thrust; a sensing surface of the optical fiber sensor right faces a front side or rear side end face of an annular protruding shoulder; the optical fiber sensor is used for measuring the axial displacement of the annular protruding shoulder when axial thrust is applied to thehorizontal input shaft, and elastic force of the elastic body can be calculated according to the Hooke's law, which is the axial thrust of the small wind turbine. The device has the advantages of compact structure, simple operation, reliable operation, high sensitivity, high measuring precision, great anti-jamming capability and long service life.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for the axial thrust of a small horizontal axis wind turbine. Background technique [0002] At present, the axial thrust measurement device mainly uses the strain sensor. The existing measurement device mainly includes the following structures. The upper bearing transmits the axial force, and the strain gauge is pasted on the side of the measuring column perpendicular to the horizontal rotation axis. When the axial force is applied, the strain gauge deforms to measure the axial thrust; this structure is relatively simple, but convex The rotational friction between the shoulder and the bearing, as well as the sluggish response of the strain gauges, limit the sensitivity and accuracy of the measuring device. In the prior art, there is also such a structure that the strain gauges on the front and rear end faces of the elastic ring installed between the ends of the bearing ou...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings and deficiencies of the prior art above, the present invention aims to provide a new type of axial thrust measuring device for a small horizontal axis wind turbine, which adopts a non-contact optical fiber sensor and uses a spring as a structure for biaxially connecting intermediate transition parts. To overcome the non-linear characteristics of existing contact sensors, weak output signals, poor anti-interference ability, and limited by space, so as to improve the sensitivity and measurement accuracy of the measuring device, enhance the anti-interference ability, and prolong the service life

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