Capacitor seal with disk body

Abstract

The present invention relates to a sealing member mounted on a capacitor, and more particularly, to a sealing member characterized by comprising a disk body made of a metal material, a cover body covering the outer circumferential surface of the disk body, and a hole formed in the cover body and through which a guide wire passes.

Description

Technical Field

[0001] The present invention relates to a seal for sealing the lower opening of a capacitor, and more specifically, to a seal characterized by comprising a disk body made of metal, a covering body covering the outer peripheral surface of the disk body, and a hole formed on the covering body for a guide wire to pass through. Background Art

[0002] Typically, an electrolytic capacitor stores an electrolyte in a housing serving as the main body. The electrolyte may be in the form of liquid, solid, or gel, and therefore a seal is incorporated into the lower portion of the capacitor to prevent the electrolyte from leaking to the outside.

[0003] The sealing member is made of synthetic rubber and is generally formed into a circular shape according to the appearance of the electrolytic capacitor. A predetermined number of holes are formed in the central portion to allow the lead wires of the electrolytic capacitor to pass through.

[0004] When these electrolytic capacitors are used in high power applications, the electrolyte expands due to the increase in temperature of the internal electrolyte, which may cause the electrolyte to leak out of the casing, as described in the prior art Korean Patent Publication No. 10-2010-0123000 on an aluminum electrolyte capacitor sealing material and a method for manufacturing the same. Figure 1 As shown, a technique is disclosed in which a hole 3 for passing a lead wire is formed in a body 1 of an electrolytic capacitor, and a reinforcement material 2 made of stainless steel is attached to the upper side of the body 1 to increase the rigidity of the sealing material.

[0005] However, the disadvantage of the known technology is that since the material of the reinforcement material 2 installed on the upper side of the main body 1 is stainless steel, its insulation from other parts such as the guide wire is poor, and it is especially difficult to replace bakelite used as a sealant in high-power capacitors. Summary of the Invention

[0006] Technical issues

[0007] The present invention is made to solve the above-mentioned various existing technical problems. The technical problem of the present invention is to provide a structure of a capacitor seal, which has a degree of rigidity and excellent insulation performance that can be used for high-power capacitors, and in particular can replace the known bakelite used as a seal for high-power capacitors.

[0008] Technical Solution

[0009] To solve the above technical problems, the capacitor seal of the present invention is characterized by comprising a disk body made of a metal material, a cover body covering the outer peripheral surface of the disk body, and a hole formed in the cover body for passing a guide wire.

[0010] Effects of the Invention

[0011] The capacitor seal of the present invention having the above-mentioned structure has the advantage of excellent insulation performance due to the outer peripheral surface of the disk being covered with the rubber material.

[0012] In addition, it has the advantage of being able to replace bakelite used in existing high-power capacitors.

[0013] In addition, by forming the protrusion unit on the metal disk, the rigidity of the seal itself is increased, which has the advantage of being applicable to high-power capacitors.

[0014] In addition, by exposing a portion of the disc surface to the upper surface of the seal, the offset or tilt of the disc can be confirmed with the naked eye, thereby achieving the effect of easily performing quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of a capacitor seal with existing reinforcement material.

[0016] Figure 2 4 is a plan view of a sealing member according to an embodiment of the present invention.

[0017] Figure 3 2 is a cross-sectional view of a sealing member according to an embodiment of the present invention.

[0018] Figure 4 A perspective view of a disc body of a sealing member according to an embodiment of the present invention.

[0019] Figure 5 This is a plan view of the disc body of the sealing member according to an embodiment of the present invention.

[0020] Figure 6 2 is a cross-sectional view of a disc body of a sealing member according to an embodiment of the present invention.

[0021] Figure 7 This is a plan view of a sealing member according to another embodiment of the present invention.

[0022] Figure 8 FIG. 4 is a cross-sectional view of a sealing member according to another embodiment of the present invention.

[0023] Figure 9 A perspective view of a disc of a sealing member according to another embodiment of the present invention.

[0024] Figure 10 A plan view of a disc body of a sealing member according to another embodiment of the present invention.

[0025] Figure 11 This is a cross-sectional view of a disc body of a sealing member according to another embodiment of the present invention.

[0026] Figure 12a and Figure 12b1 is a diagram showing the use state of a seal without chamfering treatment and the use state of a seal with corresponding chamfering treatment according to another embodiment of the present invention.

[0027] Figure 13a and Figure 13b 1 and 2. These are diagrams showing a seal according to another embodiment of the present invention in use with no protrusions for forming holes and with protrusions for forming corresponding holes.

[0028] Description of Reference Numerals

[0029] *Description of the Symbols of the Main Parts of the Drawings*

[0030] 10: Sealing member according to an embodiment of the present invention

[0031] 20: Plate

[0032] 21: Main body

[0033] 22: Protrusion unit

[0034] 23: Through hole

[0035] 30: Covering body

[0036] 40: Hole

[0037] 100: A seal according to another embodiment of the present invention

[0038] 120: disk

[0039] 121 main body

[0040] 122: Protrusion unit

[0041] 123: Through hole

[0042] 130: Covering body

[0043] 140: Hole

[0044] 141: Protrusion

[0045] 150: Groove DETAILED DESCRIPTION

[0046] Hereinafter, the configuration of a capacitor seal member having a disk body according to the present invention will be described with reference to the accompanying drawings.

[0047] However, the disclosed drawings are provided as examples to enable the concept of the present invention to be fully conveyed to those skilled in the art. Therefore, the present invention is not limited to the drawings given below and can be embodied in other forms.

[0048] In addition, unless otherwise defined, the terms used in the specification of the present invention have the meanings commonly understood by ordinary technicians in the field to which the present invention belongs, and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the main points of the present invention are omitted in the following description and drawings.

[0049] Figure 2 is a plan view of a sealing member according to an embodiment of the present invention, Figure 3 is a cross-sectional view of a sealing member according to an embodiment of the present invention, Figure 4 A perspective view of a disc body of a sealing member according to an embodiment of the present invention is shown. Figure 5 This is a plan view of the disc body of the sealing member according to an embodiment of the present invention.

[0050] Referring to the various drawings, a seal 10 for a capacitor according to an embodiment of the present invention is formed by a cover 30 covering the outer circumference of the front and back surfaces of a disk body 20 , and a hole 40 for passing a guide wire of the capacitor is formed in the center of the cover 30 .

[0051] In addition, the tray body 20 is formed with a plate-shaped main body 21 and a protrusion unit 22 protruding upward on a surface of the main body 21 .

[0052] The protrusion unit 22 is formed in a circular closed curve shape extending along the circumference of the main body 21 . A through hole 23 is formed in the center of the main body 21 for the guide wire passing through the hole 40 of the cover 30 to pass through.

[0053] At this time, the upper surface of the protrusion unit 22 is processed to be uncovered by the cover 30 , so that the upper surface of the protrusion unit 22 is exposed to the upper surface of the sealing member 10 .

[0054] Preferably, the tray body 20 is made of stainless steel, and the cover body 30 is made of rubber.

[0055] Meanwhile, in the embodiment of the present invention, the thickness (t) of the tray body 20 is formed to be 0.8 mm, the total height (h) is formed to be 2.0 mm, and the thickness (T) of the cover body 30 is formed to be 3.0±0.1 mm.

[0056] The stainless steel is steel containing elements such as chromium, carbon, nickel, tungsten, vanadium, copper, and silicon, and has the characteristics of being strong, corrosion-resistant, and having excellent rust-proof properties.

[0057] In addition, the material of the plate body 20 may be any one of aluminum, titanium, and carbon fiber in addition to stainless steel.

[0058] The rubber material of the cover 30 can be a synthetic rubber material with isobutylene-isoprene rubber (IIR) as the main raw material, which is formed into a thickness suitable for a seal through a raw material injection process, thereby covering the surface and back of the disc body 20.

[0059] In addition, the rubber material of the covering body 30 can be any one of natural rubber (NR), styrene butadiene rubber (SBR), ethylene propylene rubber (EPDM), polybutadiene rubber (BR), nitrile rubber (NBR), silicone rubber (Q), acrylic elastomers (ACM, ANM), fluororubber (FPM), hydrogenated nitrile rubber (HNBR), polyurethane (UR), and thermoplastic elastomer (TPE).

[0060] Therefore, the seal member 10 of the present invention includes the covering body 30 of a rubber material covering the hole 40 on the plane, thereby ensuring insulation from the guide wire passing through the hole 40 .

[0061] In addition, the disc body 20 inserted into the inside of the sealing member 10 is molded by the protrusion unit 22 formed on the body 21, thereby increasing rigidity and preventing the sealing member 10 from being deformed in shape due to internal pressure.

[0062] In addition, since the upper surface of the protrusion unit 22 of the tray body 20 is exposed to the upper surface of the sealing member 10, the offset and tilt of the inserted tray body 20 can be visually confirmed, thereby facilitating quality control.

[0063] Table 1 below shows the results of the bending strength measurements of the disc body 20 used in the seal 10 of an embodiment of the present invention. As comparative examples, the bending strengths of a seal made of a synthetic material of rubber and phenolic resin (Comparative Example 1) and a seal made of SUS 304 steel metal (Comparative Example 2) were also measured.

[0064]

Table 1

[0065]

[0066]

[0067] Referring to Table 1, the results show that the transverse bending strength of the disk body 20 used in the seal of the embodiment of the present invention is increased by 79% compared with the seal made of steel metal, and the longitudinal bending strength is increased by 94% compared with the seal made of steel metal. Therefore, the seal 10 of the present invention inserted into such a disk body 20 obtains an excellent rigidity effect.

[0068] In addition, the seal 10 of the embodiment of the present invention was subjected to an immersion test. The results are shown in Table 2 below. As a comparative example, an immersion test was also conducted on a seal made of a composite material of rubber and phenolic resin (Comparative Example 1).

[0069]

Table 2

[0070]

[0071]

[0072] Note: Immersion test conditions: 105 degrees Celsius, 96 hours

[0073] Referring to Table 2, the change in the seal of the embodiment of the present invention after immersion is significantly lower than that of Comparative Example 1, indicating that the seal itself is hardly immersed and has an excellent effect in preventing electrolyte leakage.

[0074] Figure 7 A plan view of a seal according to another embodiment of the present invention is shown. Figure 8 is a cross-sectional view of a seal according to another embodiment of the present invention. Figure 9 A perspective view of a disc body of a sealing member according to another embodiment of the present invention is shown. Figure 10 A plan view of a disc body of a sealing member according to another embodiment of the present invention is shown. Figure 11 This is a cross-sectional view of a disc body of a sealing member according to another embodiment of the present invention.

[0075] The seal 100 of another embodiment of the present invention is constructed as follows: the outer peripheral surfaces of the front and rear surfaces of the disk body 120 are covered by a covering body 130, a hole 140 for the guide wire of the capacitor to pass through is provided in the central part of the covering body 130, and a groove 150 with a predetermined depth is formed on the upper surface of the covering body 130, and the upper surface of the disk body 120 is exposed through the groove 150.

[0076] In addition, the tray body 120 is formed with a plate-shaped main body 121 and a protrusion unit 122 protruding upward on a surface of the main body 121 .

[0077] The protrusion unit 122 is formed in a circular arc shape extending along the circumference of the main body 121 and having a portion open. Unlike the above embodiment, the upper surface of the protrusion unit 122 is covered by the cover 130 .

[0078] In addition, a through hole 123 is formed in the central portion of the main body 121 of the tray 120 for the guide wire passing through the hole 140 to pass through.

[0079] The groove 150 is similar to the protrusion unit 122 and is formed in an arc shape having a partially open circle along the circumference of the body 121 .

[0080] Preferably, the disc body 120 is made of stainless steel, and the cover body 130 is made of rubber.

[0081] In another embodiment of the present invention, the thickness (t1) of the tray body 120 is 0.8 mm, the total height (h1) is 1.7 mm, and the thickness (T1) of the cover 30 from the front to the back is 3.0 mm.

[0082] The material of the disk body 120 may be any one of aluminum, titanium, and carbon fiber in addition to stainless steel.

[0083] Similar to the above embodiment, the rubber material of the covering body 130 can be a synthetic rubber material with isobutylene-isoprene rubber (IIR) as the main raw material, which is formed into a material with the thickness used for sealing material through a raw material injection process and covers the surface and back of the disk body 120.

[0084] In addition, the rubber material of the covering body 30 can be any one of natural rubber (Natural Rubber, NR), Styrene Butadiene Rubber (SBR), Ethylene Propylene Diene Monomer (EPDM), Polybutadiene Rubber (BR), Nitrile Butadiene Rubber (NBR), Silicone Rubber (Q), Acrylic Elastomers (ACM, ANM), Fluoro Elastomers (FPM), Hydrogenated Nitrile Rubber (HNBR), Polyurethane (UR), and Thermoplastic Elastomer (TPE).

[0085] Therefore, the sealing member 100 according to another embodiment of the present invention is covered with the rubber covering body 130 around the hole 140 on the plane, thereby ensuring insulation from the guide wire passing through the hole 140 .

[0086] In addition, the disc body 120 inserted into the inside of the sealing member 100 is molded by the protrusion unit 122 formed on the body 121, thereby increasing rigidity, thereby preventing the sealing member 100 from being deformed in shape due to internal pressure.

[0087] In addition, since the upper surface of the disc body 120 is exposed on the upper surface of the seal 100 according to another embodiment of the present invention, the offset and tilt of the inserted disc body 120 can be confirmed with the naked eye, thereby facilitating quality management.

[0088] In another embodiment of the present invention, the seal 100 is chamfered at the bottom edge of the cover 130 (so-called “C” processing) in an inclined shape from the side surface toward the bottom surface of the cover 30 .

[0089] By chamfering the lower edge of the cover 130 , the seal 100 can be easily engaged with the curling portion (P) of the capacitor case (CA), thereby improving the productivity and yield of the capacitor.

[0090] That is, when the lower edge portion of the cover 130 is not chamfered, Figure 12a As shown in FIG. 1 , when the seal 100 is inserted into the upper portion of the capacitor case (CA), the lower portion of the rubber cover 130 may slide along the inclined surface of the curling portion (P) on the side of the case (CA), causing the seal 100 to be engaged at an angle, which may result in a decrease in productivity and output. However, if the lower edge of the cover 130 is chamfered, as shown in FIG. Figure 12b As shown, since the lower part of the covering body 130 is precisely engaged with the side curling part (P) inside the shell (CA), the production efficiency and output rate are improved. In addition, since the chamfered part of the lower part of the covering body 130 expands the contact area with the side curling part (P) inside the shell (CA), the air tightness of the seal 100 is also improved.

[0091] Meanwhile, in another embodiment of the present invention, the sealing member 100 is formed with a protrusion 141 such that an edge portion of the hole 140 of the cover body 130 protrudes upward from the surface of the cover body 130 .

[0092] When the terminal (T) is coupled to the upper side of the hole 140 on the surface of the seal 100 and the rivet (R) is coupled to the lower side of the hole 140 on the back side of the seal 100, the protrusion 141 supports the pressure when the terminal (T) and the rivet (R) are pressed, thereby preventing the terminal (T) and the rivet (R) from sinking into the interior of the seal 100 in advance.

[0093] That is, in the case where the protrusion 141 is not formed on the edge of the hole 140, as shown in FIG. Figure 13a As shown in FIG. 1 , when the terminal (T) and the rivet (R) are pressed, the terminal (T) and the rivet (R) are sunk into the rubber inner side of the cover 130 of the seal 100 due to the pressing force, thereby thinning the cover 130 at the pressing portion of the terminal (T) and the rivet (R). However, in the case where a protrusion 141 is formed at the edge portion of the hole 140, as shown in FIG. Figure 13b As shown, the protrusion 141 formed at the edge of the hole 140 supports the pressure when the terminal (T) and the rivet (R) are pressed, thereby preventing the terminal (T) and the rivet (R) from sinking into the inner side of the seal 100, so that the thickness of the covering body 130 of the pressing part of the terminal (T) and the rivet (R) will not be thinner. As a result, not only the sealing performance of the seal 100 is improved, but the seal 100 does not need to be formed thicker, thereby improving the freedom of the internal space of the capacitor, thereby further increasing the capacity of the capacitor.

Claims

1. A seal for a capacitor, characterized in that: The composition includes: a metal plate (20); a covering body (30) covering the outer peripheral surface of the disc body (20); A hole (40) is formed on the cover (30) and is used for passing a guide wire.

2. The seal for capacitor according to claim 1, wherein The disc body (20) comprises: a flat plate-shaped body (21); a protrusion unit (22) protruding upward on the surface of the main body (21); a through hole (23) formed in the central portion of the main body (21); The upper surface of the protrusion unit (22) is processed to be covered by the covering body (30), and the upper surface of the protrusion unit (22) is exposed to the upper surface of the sealing member (10).

3. The seal for capacitor according to claim 2, characterized in that The disc (20) is made of stainless steel. The covering body (30) is made of rubber.

4. A seal for a capacitor, characterized in that: Composition: a disk body (120) made of metal; a covering body (130), covering the outer peripheral surface of the disc body (120); a hole (140) formed on the cover (130) for a guide wire to pass through; A groove (150) having a predetermined depth is formed on the upper surface of the cover (130), and the upper surface of the tray (120) is exposed through the groove (150).

5. The seal for capacitors according to claim 4, characterized in that The disk (120) comprises: a flat plate-shaped body (121); a protrusion unit (122) protruding upward on the surface of the main body (121); a through hole (123) formed in the central portion of the main body (121); The upper surface of the protrusion unit (122) is covered by a covering body (130).

6. The seal for capacitors according to claim 5, characterized in that The disc (120) is made of stainless steel. The covering body (130) is made of rubber.

7. The seal for capacitors according to claim 5, wherein: The lower edge of the cover (130) is chamfered, and its shape is inclined from the side surface toward the bottom surface of the cover (30).

8. The seal for capacitors according to claim 5, wherein It is composed of The edge portion of the hole (140) of the cover (130) is formed with a protrusion (141) protruding upward from the surface of the cover (130).

Images