CN203607252U

CN203607252U - Capacitor

Info

Publication number: CN203607252U
Application number: CN201320791967.7U
Authority: CN
Inventors: 李苗苗
Original assignee: KBR POWER QUALITY MANAGEMENT (SHANGHAI) Co Ltd
Current assignee: KBR POWER QUALITY MANAGEMENT (SHANGHAI) Co Ltd
Priority date: 2013-12-04
Filing date: 2013-12-04
Publication date: 2014-05-21
Anticipated expiration: 2023-12-04

Abstract

The utility model discloses a capacitor, and relates to the technical field of electrical components. The capacitor is characterized in that a copper piece is welded at the tail end of a copper tube by adopting an ultrasonic welding method, the upper end of the copper tube penetrates through and is arranged in a hole of a circular plastic cover, the copper piece is attached to the circular plastic cover in an upward mode, the upper end of the copper tube penetrates through and is arranged on a plastic supporting plate, the upper end of the copper tube is sleeved in sealing rubber, penetrates through and is arranged on an aluminum cover, the sealing rubber is arranged between the copper tube and the aluminum cover, the upper end of the copper tube penetrates through and is arranged on a wiring base and a wiring terminal and extends out of the surface of the wiring terminal; the copper piece is welded with the upper half portion of a winding connecting piece below, the upper half portion of the winding connecting piece is fixed in a groove at the reverse side of the circular plastic cover, the lower half portion of the winding connecting piece is welded with a winding, and the aluminum cover fixed on an aluminum tank in a pressing rivet mode. According to the utility model, the contact resistance of a main circuit board of the capacitor is enabled to be very low, the temperature rise is not too high when large current passes through in a long term, and the sealing performance is good.

Description

A kind of capacitor

Technical field:

The utility model relates to electric elements technical field, is specifically related to a kind of capacitor.

Background technology:

At present, low pressure used self healing capacitor in parallel on existing market, for the ease of wiring, it is provided with plastics junction block and metal wiring terminal above lid, there is conductor connection metal binding post then through junction block and reach below cover for electric container and be connected with the winding of capacitor, to realize performance requirement.Because the internal request of capacitor does not contact with air, the sealing requirements in therefore electrical connection process is very high.Conductor through lid can be connected with the winding of below, if electrical connection is not very reliable, contact resistance is larger, in the time of logical super-high-current, can produce very high temperature rise, causing capacitor internal excess Temperature, is disadvantageous to the use of capacitor, and the contact resistance that therefore reduces electrical connection is also very important.

Reach useful life or have for a long time overvoltage at capacitor, when overcurrent, inner meeting produces very high pressure, in the time that capacitor internal pressure reaches the threshold values of action, capacitor top can be swelled slightly, along with the upwards distortion at top, can make the position of junction block and binding post all upwards move, because the binding post other end of connection top, conductor one end connects following winding, therefore conductor and winding junction meeting under tension, in the time that pulling force is enough large, want conductor to be pulled off with inner being below electrically connected of winding, make capacitor can not continue energising, avoid the generation of accident, play the effect of protection, in this process, sealing is to guarantee that internal pressure continues to raise, can break the necessary condition of connection.Require again under the little condition of contact resistance, it is too tight that conductor can not be connected with winding junction, under certain pulling force, connects and can disconnect simultaneously.

In existing product, for realizing the structure that the sealing function of lid adopts be: adopt a cylindrical metal to connect binding post and following winding as conductor, binding post and conductor dbus are crossed the through hole of putting into junction block after riveting, conductor is through junction block, put a rubber ring at conductor, the two is together through crown cap, rubber ring is positioned in the middle of conductor and lid, rubber ring top is junction block, add below a supporter at rubber ring, being contained in conductor ends by screw upwards screws, make screw compress supporter and rubber ring, rubber ring is pressed between junction block and supporter, play the effect of sealing and insulation.Conductor with below in the connected mode of winding, often select first to make conductor be riveted on copper sheet, then connect copper sheet and inner winding with flexible conductor.The problem of this structure generation is: conductor and copper lug riveting can make contact resistance larger, when logical super-high-current temperature rise very high, be unfavorable for long-term use.Screw means compresses supporter and rubber ring, under long-term service condition, likely can make the effect of sealing be affected, in the time breaking down, inner pressure can not continue to raise, top can not be swelled, being connected with of binding post and winding may be drawn constantly, causes under failure condition and continues energising, and this is very disadvantageous.

Utility model content:

The purpose of this utility model is to provide a kind of capacitor, and main circuit contact resistance ratio is lower, for a long time can be very not high by heavy current warming, and good seal performance, and also the in the situation that of long-term use, sealing property is unaffected.Break down at capacitor, when top ridges, being respectively electrically connected of its inside can be broken simultaneously.

In order to solve the existing problem of background technology, the utility model is to adopt following technical scheme: it comprises coupling assembling A, aluminium pot 8, winding 11, and described coupling assembling A comprises aluminium lid 1, caulking gum 2, plastic support board 3, round plastic lid 4, copper pipe 5, copper sheet 6, winding brace 7, junction block 9, binding post 10;

Copper pipe 5 is as the conductor that connects top binding posts 10 and following winding 11, the end of copper pipe 5 adopts the upper copper sheet 6 of ultrasonic bonding welding, copper pipe 5 upper end cross-under are in the hole of round plastic lid 4, copper sheet 6 is upwards attached on round plastic lid 4, and copper pipe 5 upper end cross-under are on plastic support board 3, the upper end of copper pipe 5 be inserted in caulking gum 2 and cross-under on aluminium lid 1, caulking gum 2 is arranged between copper pipe 5 and aluminium lid 1, makes well insulation between copper pipe 5 and aluminium lid 1; Cross-under is distinguished on junction block 9 and binding post 10 in the upper end of copper pipe 5, and stretches out on the surface of binding post 10; Described aluminium lid 1, caulking gum 2, plastic support board 3, round plastic lid 4, copper pipe 5, copper sheet 6, junction block 9, binding post 10 are riveted by fixture, copper pipe 5 tops are provided with flange, and flange is pressed in the surface of binding post 10, copper pipe 5 is riveted with binding post 10, and the riveted joint place scolding tin of burn-oning, makes to connect tightr; Copper sheet 6 welds with winding brace 7 the first half of below, the first half of winding brace 7 is fixed in the groove at round plastic lid 4 back sides, winding brace 7 the latter halfs weld together realization with winding 11 and are electrically connected, winding 11 is placed in aluminium pot 8, aluminium lid 1 presses and is fixed on aluminium pot 8, realizes sealing assembling.

Described copper pipe 5 is ultrasonic bonding with the connected mode of copper sheet 6, and the contact point of welding is 3 points.

On described plastic support board 3, be provided with annular projective structure contact caulking gum 2, caulking gum 2 materials are concentrated in annulus, make sealing effectiveness better.

The utlity model has following beneficial effect:

One, because copper pipe 5 is the surfaces that are riveted on binding post 10, therefore its bonding strength is larger, after copper pipe 5 riveted joints, distortion and caulking gum 2 are out of shape the gap that can fill fully between copper pipe 5 and junction block 9, caulking gum 2 and junction block 9, caulking gum 2 and aluminium lid 1 after being squeezed, well realize sealing, and the in the situation that of long-term use, sealing property is unaffected.

Two, copper pipe 5 one end are riveted on binding post 10, and the scolding tin of burn-oning in the junction of riveted joint, the other end and copper sheet 6 link together by ultrasonic bonding, be electrically connected very reliable, contact resistance is smaller, draw by contrast test, under the condition of logical same current, its coupling assembling A contact resistance only has 1/5th of prior art same parts.Because copper pipe 5 is connected with copper sheet 6 ultrasonic waves, can control the intensity being welded to connect by the parameter of ultrasonic welding machine is set, in the time that capacitor breaks down, the inner pressure that produces, pressure makes top ridges, because copper sheet 6 is connected with copper pipe 5, copper pipe 5 is through the hole of round plastic lid 4, and copper sheet 6 touch round plastic dish 4, and copper pipe 5 is subject to pulling force upwards, under certain pulling force, being connected between copper pipe 5 and copper sheet 6 can be pulled off.The electrical connection having realized between binding post and winding is pulled off, and has played the effect of protection.Owing to there being the existence of round plastic lid 4, touch the copper sheet 6 of each phase, the connection of each phase copper pipe 5 and copper sheet 6 can be broken simultaneously.And copper pipe and the copper sheet that can weld different size by a device for ultrasonic welding, can be used in the capacitor of different size.

Accompanying drawing explanation:

Fig. 1 is decomposition texture schematic diagram of the present utility model;

Fig. 2 is the assembling schematic diagram of Fig. 1;

Fig. 3 is the decomposition texture schematic diagram of coupling assembling A in the utility model;

Fig. 4 is the decomposing schematic representation of coupling assembling A in Fig. 3;

Fig. 5 is the decomposing schematic representation of caulking gum 2 in the utility model, plastic support board 3, round plastic lid 4, copper pipe 5, copper sheet 6, winding brace 7;

Fig. 6 is the schematic diagram that in the utility model, copper pipe 5 is connected with copper sheet 6 ultrasonic waves;

Fig. 7 is the end view of Fig. 6;

Fig. 8 is the structural representation of coupling assembling A in the utility model, and scolding tin is positioned at the surface of binding post and copper pipe riveting;

The assembling schematic diagram of the part that Fig. 9 comprises for Fig. 5 in the utility model;

Figure 10 is the upward view of Fig. 9;

Figure 11 is the sectional view that in the utility model, coupling assembling A does not contain winding brace 7;

Figure 12 is the overall structure schematic diagram of capacitor in normal condition in the utility model;

Figure 13 is when in the utility model, capacitor is protected in breaking, the structural representation of top ridges;

Figure 14 is the end view of Figure 13.

Embodiment:

Referring to Fig. 1-Figure 14, this embodiment adopts following technical scheme: it comprises coupling assembling A, aluminium pot 8, winding 11, and described coupling assembling A comprises aluminium lid 1, caulking gum 2, plastic support board 3, round plastic lid 4, copper pipe 5, copper sheet 6, winding brace 7, junction block 9, binding post 10;

This embodiment has following beneficial effect:

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims

1. a capacitor, it is characterized in that it comprises coupling assembling (A), aluminium pot (8), winding (11), described coupling assembling (A) comprises aluminium lid (1), caulking gum (2), plastic support board (3), round plastic lid (4), copper pipe (5), copper sheet (6), winding brace (7), junction block (9), binding post (10), copper pipe (5) is as the conductor that connects top binding post (10) and following winding (11), the end of copper pipe (5) adopts the upper copper sheet (6) of ultrasonic bonding welding, copper pipe (5) upper end cross-under is in the hole of round plastic lid (4), copper sheet (6) is upwards attached on round plastic lid (4), and copper pipe (5) upper end cross-under is on plastic support board (3), the upper end of copper pipe (5) be inserted in caulking gum (2) and cross-under on aluminium lid (1), caulking gum (2) is arranged between copper pipe (5) and aluminium lid (1), the upper end difference cross-under of copper pipe (5) is on junction block (9) and binding post (10), and stretch out on the surface at binding post (10), described aluminium lid (1), caulking gum (2), plastic support board (3), round plastic lid (4), copper pipe (5), copper sheet (6), junction block (9), binding post (10) is riveted by fixture, copper pipe (5) top is provided with flange, and flange is pressed in the surface of binding post (10), copper pipe (5) and binding post (10) riveted joint, and the riveted joint place scolding tin of burn-oning, copper sheet (6) welds with winding brace (7) the first half of below, the first half of winding brace (7) is fixed in the groove at round plastic lid (4) back side, winding brace (7) the latter half and winding (11) welding, winding (11) is placed in aluminium pot (8), aluminium lid (1) presses and is fixed on aluminium pot (8).

2. a kind of capacitor according to claim 1, it is characterized in that described copper pipe (5) and the connected mode of copper sheet (6) are ultrasonic bonding, and the contact point of welding is 3 points.

3. a kind of capacitor according to claim 1, is characterized in that on described plastic support board (3), being provided with annular projective structure contacts caulking gum (2).