CN102737854A

CN102737854A - Fixing groove for fixing core cladding in aluminum case of capacitor

Info

Publication number: CN102737854A
Application number: CN 201110087607
Authority: CN
Inventors: 周旺龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2012-10-17
Also published as: WO2012136073A2; WO2012136073A3

Abstract

The invention relates to a method and a structure for fixing a core cladding in the bottom of an aluminum case in a large-scale aluminum electrolytic capacitor. A circular groove or an inscribed circular groove with the same external diameter as the core cladding of the capacitor is pressed from a direction of an external side of the aluminum case bottom to a direction of an internal side of the aluminum case bottom. When the capacitor is assembled, a lower end of the core cladding is put into the fixing groove as a whole and is clamped, so a fixed force bearing area of the core cladding is increased and dependability in a vibration condition can be enhanced.

Description

A kind of holddown groove of aluminium shell of capacitor internal fixation core bag

Technical field:

The present invention relates to fixing means and fixed structure that the large-scale aluminum electrolysis capacitor inner core wraps in the aluminum hull inner bottom part.

Background technology:

The blank cover 2 that large-scale aluminum electrolysis capacitor is curled the core bag 4 that constitutes, outside cylindrical shape aluminum hull 1 and had a both positive and negative polarity binding post 3 by inner both positive and negative polarity aluminium foil and electrolytic paper is formed.Curling, the both positive and negative polarity aluminium foil that constitutes core bag 4 is connected with blank cover 2 inboard corresponding both positive and negative polarity binding post 3 usefulness aluminium leads 5, conducting.

For making core bag 4 in the aluminum hull 1 of sealing, obtain the fixing dual mode that adopts usually.

Mode 1: traditional fixed form is a perfusion fixing glue 6 between core bag 4 and aluminium shell 1, and core bag 4 can not slided in aluminum hull 1.As shown in Figure 1.So adopt this kind mode because the big capacitor of lifting surface area has anti-vibration performance preferably.

Capacitor work SMIS bag 4 can generate heat; Make core bag 4 interior heats distribute the reduction temperature rise as early as possible; Can improve capacitor ripple current capacity and life-span; Usually adopt core bag 4 one side negative pole aluminium foils to extend 9 knockout bags, 4 outsides and also directly contact with aluminum hull 1 inside bottom, so can improve the heat dispersion of capacitor greatly, this kind negative pole extends 9 radiator structures must adopt following fixed form.

Mode 2: protrusion tapered pole 7 is arranged in blank cover 2 inboards; Have one can insert the fixed lever 8 in core bag 4 volume core holes in aluminium shell 1 inside bottom central authorities corresponding tapered pole 7 positions; Utilize tapered pole 7 and fixed leg 8 to insert respectively in the volume core hole of core bag both sides about in the of 4, and core bag 4 can not slided in aluminum hull 1 with cover plate 2 clampings.As shown in Figure 2.This fixed form is because lifting surface area is little, so constant intensity is relatively poor, particularly when capacitor is laterally placed or be in the vibration environment, situations such as the core bag is loose, electrolyte oozes out can occur, and can cause extreme situations such as capacitor short-circuit, blast when serious.

Summary of the invention:

The present invention provides a kind of negative pole that can adopt to extend 9 radiator structures, installs and improves the constant intensity of core bag 4 at aluminum hull 1 inner bottom part easily and greatly, guarantees the fixing means and the structure of reliability under the vibration environment.

Concrete technical scheme of the present invention is: extrude and corresponding to circle of capacitor core bag 4 external diameters or inscribed circle rhombus groove at aluminum hull 1 bottom outside side direction in aluminum hull 1.The degree of depth of groove is that the length of institute's jewelling shell 1 serves as appropriate to satisfy fixed core bag 4 needs.When capacitor is installed; Core bag 4 bottom integral body are put into holddown groove and chucking; Capacitor core bag 4 tops still utilize the inboard protrusion of blank cover 2 tapered poles 7 to insert in the volume core hole of core bags 4 upsides, and clamp with cover plate 2 the core bag 4 completion capacitor that can aluminum hull 1 in, not slide is fixedly mounted.

Holddown groove can be to process when making aluminum hull 1, also can when capacitor assembles, extrude.For improving constant intensity, adopt the fixing aluminum hull bottom of still can adopting simultaneously of holddown groove to add fixed leg 8 modes.

Holddown groove can be with the corresponding to circular holddown groove of core bag external diameter also can be inscribed circle and the corresponding to rhombus fixed card slot of core bag external diameter.

Circular or the rhombus inscribed circle cross section of holddown groove can be with aluminium shell cross section circular coaxial also can be that both disalignment was not tangent yet for tangent circle.

Because holddown groove fixed core bag 4 lifting surface areas are big, it is high to compare fixed leg 8 constant intensities, and installation reliability is high under the particularly vibrations condition; Install relatively easy.

Specifically see embodiment.

Description of drawings:

Fig. 1 is that core wraps in aluminum hull internal fixation mode 1, adopts perfusion fixing glue fixed form schematic cross-section.

Fig. 2 is that core wraps in aluminum hull internal fixation mode 2, adopts taper pinnacle and fixed lever fixed form schematic cross-section.

Fig. 3 is the circular draw-in groove mount fixing structure sketch map in aluminium shell of capacitor bottom.

Fig. 4 a is an aluminium shell of capacitor bottom rhombus draw-in groove mount fixing structure sketch map.

Fig. 4 b is aluminium shell of capacitor bottom inscribed circle rhombus draw-in groove and the tangent sketch map of aluminum hull cross section circle.

Numerical reference explanation among the figure:

1, capacitor aluminium shell 2, capacitor seal terminal cover plate 3, capacitor terminal

4, capacitor inside is by both positive and negative polarity aluminium foil and the curling core bag that constitutes of electrolytic paper

5, core bag electrode is drawn paper tinsel 6, core bag fixing glue 7, the inboard core bag of cover plate taper fixed leg

8, aluminum hull inside bottom core bag fixed leg 9, negative pole extension

10, capacitor exterior insulation sleeve pipe

M1: capacitor cylinder axis M2: the core cylinder axis that takes all of

Embodiment:

Embodiment 1: protrusion tapered pole 7 is arranged in blank cover 2 inboards, the circular draw-in groove that is extruded by lateral aluminum hull 1 inboard axis direction is arranged in aluminium shell 1 bottom.

When capacitor is installed capacitor core bag 4 bottom integral body are put into circular holddown groove and chucking is fixed; The volume core hole internal fixation that utilizes tapered pole 7 to insert core bag 4 tops is again lived in portion; With cover plate 2 clampings core bag 4 can not slided in aluminum hull 1, accomplish the capacitor assembling.

Core bag 4 is sticked into holddown groove compare that fixed legs 8 are inserted in core bag 4 volume core holes is relatively easy, because holddown groove fixed core bag 4 lifting surface areas are big, constant intensity is improved.

See Fig. 3 sketch map.

Embodiment 2: the rhombus draw-in groove that side direction extrudes in aluminium shell 1 bottom has by the lateral aluminum hull, and rhombus draw-in groove inscribed circle and aluminum hull cross section circle are tangent, and there is the protrusion tapered pole 7 at corresponding rhombus draw-in groove inscribed circle center blank cover 2 inboards.

When capacitor is installed capacitor core bag 4 bottom integral body are put into the rhombus holddown groove and tighten, the volume core hole internal fixation that utilizes tapered pole 7 to insert core bag 4 tops is again lived in portion, clamps with cover plate 2 core bag 4 can not slided in aluminum hull 1, accomplishes the capacitor assembling.

Fixedly lifting surface area is big owing to core bag 4 bottoms, and constant intensity improves greatly, and particularly capacitor dependability under the vibrations condition is high.

See Fig. 4 a, Fig. 4 b sketch map.

Claims

1. a large-scale aluminum electrolysis capacitor aluminum hull is extruded by bottom outside side direction in aluminum hull and is used for core with corresponding to circle of capacitor core bag external diameter or inscribe circular recess and wraps in fixing in the aluminum hull; It is characterized in that: core bag downside one end integral body is put into holddown groove and can be tightened, and can not slide.

2. large-scale aluminum electrolysis capacitor inner core according to claim 1 wraps in the fixed card slot in the aluminum hull, it is characterized in that: holddown groove can be to process when making aluminum hull, also can when capacitor assembles, extrude.

3. large-scale aluminum electrolysis capacitor inner core according to claim 1 wraps in the fixed card slot in the aluminum hull, it is characterized in that the described draw-in groove degree of depth is that institute's jewelling shell length serves as appropriate in the whole length about 1/3rd of aluminum hull to satisfy fixed core bag needs.

4. large-scale aluminum electrolysis capacitor inner core according to claim 1 wraps in the fixed card slot in the aluminum hull, it is characterized in that the circular or circular holddown groove of inscribe in described cross section can be with aluminium shell cross section circular coaxial also can be that tangent both disalignments are not tangent yet.