Clamping loading and sealing structure for capacitor sealing strength detection

Abstract

The invention discloses a clamping loading and sealing structure for capacitor sealing strength detection. The clamping loading and sealing structure comprises a clamping loading mechanism and a sealing mechanism. The clamping loading mechanism comprises a top plate, stand columns, a table plate, linear bearings, a chuck installation plate, guide shafts, a nut, a lead screw, a hand wheel, a clamp ring, a three-jaw chuck assembly and jaws. The sealing mechanism comprises an oil way connecting disc, a rubber plate, a filling piece and an expansion stopping ring. The clamping loading mechanism clamps an aluminum shell test piece, a trapezoid lead screw and nut mechanism drives the rubber plate to closely press the opening of the aluminum shell test piece to achieve end face sealing, the expansion stopping ring limits external expansion deformation generated in the hydraulic loading process of the aluminum shell test piece, and thus sealing is reliable. The clamping loading and sealing structure can be applied to aluminum shell test pieces of different diameters for sealing strength detection tests by replacing the jaws, the filling piece and the expansion stopping ring.

Description

technical field [0001] The invention relates to the field of seal strength detection, in particular to a clamping and loading sealing structure for capacitor seal strength detection. 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 highest pressure ...

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

Images