Capacitor seal strength detection device and detection method thereof

Abstract

The invention discloses a capacitor seal strength detection device and a detection method thereof. The detection device comprises a test piece clamping and sealing mechanism, a hydraulic system, and a pressure detection storage system; wherein the test piece clamping and sealing mechanism comprises a guide shaft, a linear bearing, a frame, a chuck installation plate, a nut, a screw rod, a hand wheel, a snap ring, a three-claw chuck assembly, a jack catch, an oil way connection disc, a rubber sheet, a filling member, and an expansion stopping ring. The hydraulic system comprises a hydraulic pump station, an overflow valve, a pressure reducing valve, a first electromagnetic valve, a throttle valve, a pressure meter, and a second electromagnetic valve. The pressure detection storage system comprises a recorder and a pressure transmitter. The provided detection device uses oil pressure to detect the capacitor seal strength, the pressure adjustment is convenient, the detection results are accurate, and the dynamic data during the detection process can be completely stored for following analysis.

Description

technical field [0001] The invention relates to the field of capacitor sealing strength detection, in particular to a capacitor sealing strength detection device and a detection method thereof. Background technique [0002] Aluminum electrolytic capacitors are mainly composed of core packs, aluminum shells, cover plates, aluminum terminals, sealing rings, etc. The core package is placed inside the aluminum shell, fixed by fixing glue or thimble, and the sealing machine realizes the crimping of the aluminum shell and presses the sealing ring on the cover plate to complete the sealing of the capacitor. During the use of aluminum electrolytic capacitors, when the ambient temperature becomes high, the pressure inside the aluminum shell will increase. When the pressure exceeds the limit of the crimping strength of the aluminum shell, the crimping of the aluminum shell will be damaged, thus affecting the safety of the capacitor. The sealing strength of the capacitor is the highes...

AI Technical Summary

Problems solved by technology

During the test of this sealing method, when the internal pressure of the capacitor case is high, its reaction force acts on the compression cylinder, making the seal between the gasket and the opening of the capacitor case unreliable; Expansion and deformation, so that the gasket will also deform in the radial direction, affecting its sealing effect; in addition, because the stroke of the compression cylinder is fixed, when the height of the capacitor case to be measured is smaller than the theoretical size, the compression cylinder may not be completely compressed Gasket, the sealing effect is not necessarily reliable, and when the height of the capacitor case to be measured is larger than the theoretical size, the compression cylinder may compress the gasket too deeply and the gasket will be cut off and cannot be sealed

In addition, the test results are read by the pressure gauge, which can only obtain the pressure at the moment when the capacitor shell is damaged or leaked, and there is no dynamic test data for the entire test process

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