Generator stator slot wedge tightness detection device

Abstract

A generator stator slot wedge tightness detection device is used as a component of a wall-climbing robot for detecting in a generator stator chamber. The stator slot wedge tightness detection device comprises: a pulse vibration exciter which is used for knocking a stator slot wedge according to a set frequency by connecting a knocking connecting rod of which the driving head is provided with a knocking hammer; a sound pressure sensor which receives a sound signal sent by knocking of the knocking hammer; and a translation lifting stable bracket, wherein the pulse vibration exciter and the knocking connecting rod which is connected and driven by the pulse vibration exciter and is provided with a knocking hammer at the head part are arranged on the translation lifting stable bracket and move along with the movement of the translation lifting stable bracket.

Description

technical field [0001] The invention belongs to the technical field of power station equipment, and in particular relates to a generator stator slot wedge tightness detection device. Background technique [0002] In the power industry, power station equipment usually has a long service life. During the long-term operation of the generator set, due to aging, vibration, wear and other reasons, the stator core is worn, the insulation is damaged, and the slot wedge is loose. The looseness of the slot wedge causes the originally compressed stator bar under the slot wedge to loosen, and the stator bar generates electromagnetic vibration under the action of electromagnetic force, which further aggravates the mechanical wear of the insulation of the stator bar and causes discharge in the slot. These will accelerate the aging of the wire rod insulation, threaten the safe operation of the generator, and even cause motor operation accidents. Therefore, it is of great significance for...

AI Technical Summary

Problems solved by technology

This detection method needs to extract the generator rotor before the detection, which not only consumes a lot of manpower and material resources, but also has a long detection cycle, and the loss caused by the shutdown during the maintenance period is relatively large.

Moreover, such a detection scheme cannot quantitatively analyze the tightness of the slot wedge, lacks objectivity, and cannot retain data records that can be repeatedly queried

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