High oil resistance aluminum electrolytic capacitor

Abstract

The utility model belongs to aluminium electrolytic capacitor technical field, and disclose a kind of high oil resistance aluminium electrolytic capacitor, including aluminium electrolytic capacitor shell, still include first subassembly, second subassembly, third subassembly, first subassembly includes first sealing sheet, second subassembly includes fixed ring, and third subassembly includes baffle;Aluminium electrolytic capacitor shell is fixedly connected with baffle in, the upper surface of baffle is fixedly connected with the first sealing sheet on setting and has location insertion hole, the upper surface of first sealing sheet is fixedly connected with two first sealing rings, the lower surface of fixed ring is fixedly connected with spring, the lower surface of spring is fixedly connected with second sealing sheet, through the cooperation of location insertion hole, fixed ring, spring, second sealing sheet and location insertion column, double ensure that two sealing sheets contact for a long time, to ensure sealing property, even if long-term use leads to baffle loosening, still can ensure sealing property, the probability of oil entering inside reduces, the possibility of electrolyte pollution drops, improves stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of aluminum electrolytic capacitors, specifically a high oil-resistant aluminum electrolytic capacitor. Background Technology

[0002] In hydraulic systems (such as injection molding machines and excavator hydraulic pumps) and machine tool lubrication systems, capacitors need to be in contact with hydraulic oil and lubricating oil for a long time, and are subject to temperature cycles of -20~120℃ and vibration shocks of 50~500Hz. The sealing structure of ordinary aluminum electrolytic capacitors is easily corroded by oil, which cannot meet the requirements for a long service life. Although traditional aluminum electrolytic capacitors have the advantages of low cost and large capacity, the sealing structure mostly adopts the design of ordinary rubber sealing sheet + metal baffle, which has two major shortcomings: first, the sealing sheet has poor oil resistance (such as nitrile rubber, which is prone to swelling and aging under long-term oil immersion); second, the baffle fixing method is simple and is prone to loosening later.

[0003] Meanwhile, an oil-resistant aluminum electrolytic capacitor with application number CN201520803466.5 includes a shell and a capacitor core, and also includes a rubber stopper. The rubber stopper and the shell form an inner closed cavity, in which the capacitor core is disposed. An oil separator is connected to the rubber stopper. The rubber stopper is used to seal the electrolyte inside the capacitor, and the oil separator is used to prevent the rubber stopper from direct contact with the external oily environment. The rubber stopper is connected to the oil separator through an adhesive layer, which may be silicone rubber, and the oil separator is composed of an oil-resistant material.

[0004] However, the following problems were found in the implementation of the relevant technologies: existing products mostly use snap-on or single-point welding to fix the baffle. Due to long-term temperature cycling and vibration, the baffle is prone to loosening and displacement, resulting in uneven pressure on the sealing plate. Gaps will form in places where the pressure is insufficient, and oil can slowly penetrate into the interior through the gaps, causing sealing failure.

[0005] Therefore, we propose a high oil-resistant aluminum electrolytic capacitor. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a high oil-resistant aluminum electrolytic capacitor, which has the advantage of ensuring tight contact between the two sealing plates and maintaining a tight seal even if the baffles loosen due to long-term use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high oil-resistant aluminum electrolytic capacitor, comprising an aluminum electrolytic capacitor shell, and further comprising a first component, a second component, and a third component. The first component includes a first sealing sheet, the second component includes a fixing ring, and the third component includes a baffle. A partition is fixedly connected inside the aluminum electrolytic capacitor shell. The upper surface of the partition is fixedly connected to the first sealing sheet, which has a positioning hole. Two first sealing rings are fixedly connected to the upper surface of the first sealing sheet. A spring is fixedly connected to the lower surface of the fixing ring, and a second sealing sheet is fixedly connected to the lower surface of the spring. Two positioning pins are fixedly connected to the lower surface of the second sealing sheet, and a second sealing ring is fixedly connected to the lower surface of the second sealing sheet. A stud is fixedly connected to the lower surface of the baffle, and a top block is fixedly connected to the lower surface of the stud.

[0008] Preferably, the partition divides the aluminum electrolytic capacitor casing into an equipment cavity and a sealed cavity.

[0009] Preferably, the upper end of the aluminum electrolytic capacitor casing is provided with threads, and the threads are threadedly connected to the studs.

[0010] Preferably, a sealing sleeve is provided on the outer surface of the stud.

[0011] Preferably, the outer surface of the positioning post is provided with a protrusion, and the positioning post is movably connected to the positioning hole.

[0012] Preferably, the second sealing ring is in contact with two first sealing rings, and both the second sealing ring and the first sealing ring are made of silicone.

[0013] Preferably, the top block is in contact with the second sealing plate, and the stud is in contact with the retaining ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, through the cooperation of the fixing ring, spring, second sealing plate, baffle, stud and top block, can ensure that the two sealing plates are in close contact, reduce the penetration path of oil through the interface, improve the long-term sealing integrity, reduce the performance degradation caused by oil intrusion, maintain stable sealing performance, protect the core structure of the capacitor and avoid performance failure.

[0016] 2. This utility model, through the cooperation of positioning hole, fixing ring, spring, second sealing plate and positioning post, double ensures long-term contact between the two sealing plates, thereby ensuring sealing performance. Even if the baffle loosens due to long-term use, the sealing performance can still be ensured. The probability of oil entering the interior is reduced, the possibility of electrolyte contamination is reduced, and the stability is improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the first component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the second and third components of this utility model.

[0021] In the diagram: 1. Aluminum electrolytic capacitor casing; 2. Separator; 3. First assembly; 31. First sealing plate; 32. Positioning insertion hole; 33. First sealing ring; 4. Second assembly; 41. Fixing ring; 42. Spring; 43. Second sealing plate; 44. Positioning insertion post; 45. Second sealing ring; 5. Third assembly; 51. Baffle; 52. Stud; 53. Top block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, this utility model provides a high oil-resistant aluminum electrolytic capacitor, including an aluminum electrolytic capacitor shell 1, comprising an insulating film + aluminum shell + elements + positive and negative conductors + electrolyte + sealing cap, (elements: positive foil, negative foil, electrolytic paper, stacked and wound together), (positive and negative conductors: needle type, horn type, bolt type are all acceptable), preventing oil and liquid from entering; to demonstrate high sealing performance in liquid environments, it also includes a first component 3, a second component 4, and a third component 5, the first component 3 including a first sealing sheet 31, the second component 4 including a fixing ring 41, and the third component 5 including a baffle 51; the aluminum electrolytic capacitor shell 1 contains... A partition 2 is fixedly connected. A first sealing plate 31 is fixedly connected to the upper surface of the partition 2. The first sealing plate 31 is provided with a positioning hole 32. Two first sealing rings 33 are fixedly connected to the upper surface of the first sealing plate 31. A spring 42 is fixedly connected to the lower surface of the fixed ring 41. A second sealing plate 43 is fixedly connected to the lower surface of the spring 42. Two positioning pins 44 are fixedly connected to the lower surface of the second sealing plate 43. A second sealing ring 45 is fixedly connected to the lower surface of the second sealing plate 43. A stud 52 is fixedly connected to the lower surface of the baffle 51. A top block 53 is fixedly connected to the lower surface of the stud 52.

[0024] Specifically, the partition 2 divides the aluminum electrolytic capacitor casing 1 into an equipment cavity and a sealed cavity.

[0025] Furthermore, the upper end of the aluminum electrolytic capacitor casing 1 is provided with threads, which are threadedly connected to the stud 52.

[0026] Furthermore, a sealing sleeve is provided on the outer surface of the stud 52.

[0027] It is worth noting that the outer surface of the positioning pin 44 is provided with a protrusion, and the positioning pin 44 is movably connected to the positioning hole 32.

[0028] It is worth noting that the second sealing ring 45 is in contact with the two first sealing rings 33, and the material of the second sealing ring 45 and the first sealing rings 33 is silicone.

[0029] It is worth mentioning that the top block 53 is in contact with the second sealing plate 43, and the stud 52 is in contact with the retaining ring 41.

[0030] The aluminum electrolytic capacitor casing 1 is existing technology and will not be described further. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described further. The "front, back, left, and right" views of this device are... Figure 1 The direction shown in the diagram is the reference.

[0031] Working Principle: In use, firstly, the aluminum electrolytic capacitor is installed inside the aluminum electrolytic capacitor casing 1 and separated from it by a partition 2. Then, the first component 3 is installed on the partition 2. Next, the second component 4 is installed on the first component 3. The second component 4 is first positioned by the positioning pin 44 and the positioning hole 32, ensuring accurate positioning of the first sealing plate 31 and the second sealing plate 43 through the positioning structure. Simultaneously, the positioning pin 44 engages with the positioning hole 32 through its outer protrusion, thus fixing the first sealing plate 31 and the second sealing plate 43. This completes the installation of the first component 3 and the second component 4. Finally, the third component 5 is installed inside the aluminum electrolytic capacitor casing 1. At the upper end, the third component 5 is installed through the thread on the upper end of the aluminum electrolytic capacitor shell 1 via the second component 4. During the installation process, the third component 5 pushes the second sealing plate 43 by the top block 53, and at this time the stud 52 contacts the fixing ring 41, ensuring that the second sealing plate 43 is in close contact with the first sealing plate 31, thereby ensuring the sealing performance. After long-term use, the stud 52 may loosen. The spring 42 on the fixing ring 41 applies the elastic force to the second sealing plate 43, thereby pushing the second sealing plate 43, and engaging with the protrusion on the positioning plug 44 in the positioning plug hole 32, preventing the second sealing plate 43 from loosening, so that the second sealing plate 43 and the first sealing plate 31 maintain close contact, ensuring the sealing performance.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high oil-resistant aluminum electrolytic capacitor, comprising an aluminum electrolytic capacitor casing (1), characterized in that: It also includes a first component (3), a second component (4), and a third component (5), wherein the first component (3) includes a first sealing plate (31), the second component (4) includes a retaining ring (41), and the third component (5) includes a baffle plate (51); A partition (2) is fixedly connected inside the aluminum electrolytic capacitor shell (1). A first sealing plate (31) is fixedly connected to the upper surface of the partition (2). A positioning hole (32) is provided on the first sealing plate (31). Two first sealing rings (33) are fixedly connected to the upper surface of the first sealing plate (31). A spring (42) is fixedly connected to the lower surface of the fixing ring (41). A second sealing plate (43) is fixedly connected to the lower surface of the spring (42). Two positioning pins (44) are fixedly connected to the lower surface of the second sealing plate (43). A second sealing ring (45) is fixedly connected to the lower surface of the second sealing plate (43). A stud (52) is fixedly connected to the lower surface of the baffle (51). A top block (53) is fixedly connected to the lower surface of the stud (52).

2. The high oil resistance aluminum electrolytic capacitor according to claim 1, characterized in that: The partition (2) divides the aluminum electrolytic capacitor casing (1) into an equipment cavity and a sealed cavity.

3. The high oil resistance aluminum electrolytic capacitor according to claim 1, characterized in that: The upper end of the aluminum electrolytic capacitor shell (1) is provided with a thread, which is threadedly connected to the stud (52).

4. The high oil resistance aluminum electrolytic capacitor according to claim 1, characterized in that: The outer surface of the stud (52) is provided with a sealing sleeve.

5. A high oil-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The outer surface of the positioning pin (44) is provided with a protrusion, and the positioning pin (44) is movably connected to the positioning hole (32).

6. The high oil resistance aluminum electrolytic capacitor according to claim 1, characterized in that: The second sealing ring (45) is in contact with the two first sealing rings (33), and the material of the second sealing ring (45) and the first sealing rings (33) is silicone.

7. The high oil resistance aluminum electrolytic capacitor according to claim 1, characterized in that: The top block (53) is in contact with the second sealing plate (43), and the stud (52) is in contact with the retaining ring (41).

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