Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer

Abstract

The invention aims at providing a permanent magnetizer and a magnetic flux leakage testing probe formed by the permanent magnetizer. The permanent magnetizer comprises a first annular permanent magnet body, a second annular permanent magnet body and an annular armature, wherein the annular armature is clamped between the first annular permanent magnet body and the second annular permanent magnet body, and the annular armature, the first annular permanent magnet body and the second annular permanent magnet body are coaxial and are jointed to form a through type permanent magnetizer. The magnetic flux leakage testing probe formed by the through type permanent magnetizer further comprises a shoe-shaped probe which is arranged in an inner cavity of the armature coaxially and is detachably connected with the armature. The magnetic flux leakage testing probe disclosed by the invention integrates magnetization and signal output functions, has the advantages of small size, light weight, strong universality, low cost and the like, and can be suitable for the characteristics of components to be tested on the large swing amplitude and the high change speed; and the probe has a split structure, can also form a through type probe during operation, also has the effect close to the magnetization effect of a through type solenoid coil, and especially can realize the nondestructive testing requirements of non-end or two-end anchored components under the conditions of high speed and large swinging amplitude.

Description

technical field [0001] The invention belongs to the magnetic flux leakage non-destructive detection technology, in particular to a through-type permanent magnet magnetizer and a magnetic flux leakage detection probe composed of it. Background technique [0002] Magnetic excitation is one of the primary key technologies of magnetic flux leakage detection, and there are often different magnetization methods and structural requirements for different detection objects and working conditions. The permanent magnet magnetization device has the advantages of small size, high unit magnetic energy product, and no need to provide an additional power supply, and is widely used in portable magnetic flux leakage nondestructive testing probes. However, the existing permanent magnetization magnetic flux leakage detection probes are all permanent magnet yoke structures, and each probe is composed of a plurality of independent yoke assemblies, and each independent yoke assembly is composed of...

AI Technical Summary

Problems solved by technology

Since different sizes and specifications require different detection probes, this detection probe is not universal and interchangeable

In addition, the close proximity of the magnetic poles of the yoke and facing the object to be tested also leads to excessive magnetic attraction, which causes mutual damage between the detection probe and the object to be detected when scanning at high speed, and the detection probe is not easy to separate from the object to be detected. body

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