Method for directly measuring deflection of double-armature rotor shaft

Abstract

The invention discloses a method for directly measuring deflection of a double-armature rotor shaft. The method can be used for directly and accurately acquiring the deflection of the double-armature rotor shaft. The method comprises the following steps: confirming a datum point and a maximum deflection point; mounting a rotor shaft and a straightening rotor shaft; measuring actual external diameters of a measure datum point gear and a maximum deflection point gear; measuring a radius variation of the measure datum point gear; measuring a radius difference value of the measure datum point gear and the maximum deflection point gear; and calculating by firstly subtracting an average value of the measure actual external diameter of the maximum deflection point gear from the average value of the actual external diameter of the measure datum point and then dividing a subtracted result by two, thereby acquiring an actual radius difference value P of the measure datum point gear and the maximum deflection point gear, and lastly subtracting the radius variation J of the measure datum point gear and the actual radius difference value P from the radius difference value Z of the datum point gear and the maximum deflection point gear, thereby acquiring the difference value, namely the deflection N of the maximum deflection point gear, wherein the maximum value is the maximum deflection of the rotor shaft.

Description

technical field [0001] The invention relates to a method for measuring deflection, in particular to a method for directly measuring the deflection of a double armature rotor shaft. Background technique [0002] Deflection - the linear displacement of the centroid of the cross section along the direction perpendicular to the axis during bending deformation is called the deflection, expressed by y. In short, it refers to the maximum deformation of flexural members such as beams and trusses under load, and usually refers to the y-axis in the vertical direction, which is the vertical deformation of the member. [0003] Since the double-armature rotor shaft has a special structure that is longer than the single-armature rotor shaft, it is more necessary to measure the deflection caused by the self-weight of the double-armature rotor shaft. That is to calculate the shaft deflection of the double armature rotor. Since the gravity distribution load of parts on the double-armature ...

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Problems solved by technology

[0004] Usually, the following methods are used to measure the deflection: for example, a level made of optical principles, which uses the principle of laser target shooting, the principle of optical lens target point imaging, and deflection monitoring devices made of liquid level connectors. These devices have complex structures and low prices. Expensive, inconvenient to maintain, not suitable for mass production enterprises

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