Ceramic terminal for power capacitor

Abstract

The invention discloses a ceramic terminal for a power capacitor, comprising a ceramic insulator and a mounting assembly arranged on the lower part of the ceramic insulator. The ceramic insulator is provided with through holes along the own central axis; the outer wall of the middle of the insulator is provided with multiple umbrella skirts; the outer wall of the lower part of the insulator is provided with an annular positioning boss; the mounting assembly comprises a metal rolling member, an annular sealing ring and a base tube; the annular sealing ring is sleeved on the outer wall of the lower part of the insulator and is arranged in a way of adjoining to the bottom wall of the annular positioning boss; the metal rolling member comprises a pressing part for compressing the annular sealing ring on the bottom wall of the annular positioning boss, a sheathing part sheathed on the annular positioning boss and a rolling ring fastened on the top wall of the annular positioning boss in a rolling manner; and the base tube comprises a welding part connected with the rolling member in a welding or cementing manner, and a sleeving part integrally formed with the welding part. The ceramic terminal effectively simplifies the structure and assembly operation, and reduces the production cost as well.

Description

technical field [0001] The invention relates to the technical field of ceramic terminal structure design, in particular to a ceramic terminal used for power capacitors. Background technique [0002] The ceramic insulators of high-voltage capacitors currently on the market use silver to weld the mounting part and ceramics together to make them firmly fixed on the ceramics. The cost of this product is high, the steps are cumbersome, and the processing time is long. [0003] Traditional ceramic insulators need to weld metal wiring components and installation components with ceramic insulators. Due to the particularity of ceramics, special solder with silver alloy as the main component needs to be used. This solder is very expensive. At the same time, in order to ensure The firmness of the combination of the two also requires a relatively thick solder layer, and more materials are used, which leads to the high cost of this kind of insulator; in addition, in order to prepare this...

AI Technical Summary

Problems solved by technology

[0005] During the follow-up R&D and trial production process, the applicant found that two semi-circular metal retaining rings are welded and fixed to the metal mounting seat, so as to ensure that the metal mounting seat is firmly fixed on the ceramic outer wall. This structure is feasible and can meet the requirements of the national Relevant standards, but the operation process of its processing and installation is relatively cumbersome, and it is necessary to use a special special fixture to clamp the metal retaining ring and the metal mounting seat, so that it can be welded smoothly

[0006] In addition, the structure of the metal mounting seat used in this kind of ceramic insulator device is relatively complicated, the cost is high, and the manufacturing process is relatively cumbersome.

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