CN210668104U

CN210668104U - Circular direct current supports condenser with seal structure

Info

Publication number: CN210668104U
Application number: CN201921270019.2U
Authority: CN
Inventors: 刘立志; 江海波; 何智康
Original assignee: Sheng Ye Electrical Co ltd
Current assignee: Sheng Ye Electrical Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-06-02
Anticipated expiration: 2029-08-06

Abstract

The utility model relates to a circular direct current supports condenser with seal structure, its including hold the electric capacity core the casing and with the apron that the casing top is connected, and, the casing includes fastening structure, fastening structure includes the follow the higher authority of apron inserts upside down the portion of colluding of apron, the border of apron extends to in the slot that colludes the portion formation, through collude the portion, but the casing straining the apron. The utility model discloses a circular direct current supports condenser seal structure can make circular direct current support condenser work in the high temperature and high humidity environment, and then has better application scope.

Description

Circular direct current supports condenser with seal structure

Technical Field

The utility model relates to a condenser technical field especially relates to a circular direct current supports condenser with seal structure.

Background

Direct current support capacitors, also known as DC-Link capacitors. A DC support capacitor belongs to one of passive devices. The direct current support capacitor mainly adopts a polypropylene film medium direct current support capacitor (film capacitor), and has the advantages of high voltage resistance, large current resistance, low impedance, low inductance, small capacity loss, small leakage current, good temperature performance, high charging and discharging speed, long service life (about 10 ten thousand hours), good safety explosion-proof stability, convenient non-polar installation and the like. Is widely applied to the power electronic industry.

In a wind power generation system, a direct current support capacitor is generally a film capacitor, and generally, the film capacitor needs to work in a high-temperature and high-humidity environment due to a special working environment of a wind power system. For example, the cover plate is easily lifted up in a high temperature environment to damage other electronic devices. For another example, moisture from the outside can easily enter the housing, which can cause the capacitor core to be damaged.

SUMMERY OF THE UTILITY MODEL

To the defect of prior art, the utility model aims to solve the technical problem that a circular direct current supports condenser with seal structure is provided, this circular direct current supports condenser seal structure can make circular direct current support condenser work in the high temperature and high humidity environment.

A circular direct current supports condenser with seal structure, including the casing that holds the electric capacity core and with the apron that the casing top is connected, the casing includes fastening structure, fastening structure include from the higher authority of apron inserts upside down the apron) colludes the portion, the border of apron extends to in the slot that colludes the portion formation, through colluding the portion, the casing can be fastened the apron.

Preferably, the cover plate includes a snap ring into which the hook is inserted upside down.

Preferably, a sealing ring is placed in the clamping ring, and the sealing ring and the hook part are mutually extruded.

Preferably, the sealing ring is a rubber ring.

Preferably, the casing includes towards the convex bump of electric capacity core direction, the one end of apron is equipped with the card pin, the card pin court the bottom of casing extends and extends to the salient point department, the card pin includes the concave part, the salient point with the concave part joint.

Preferably, the housing comprises a rolling groove protruding towards the capacitor core,

one end of the cover plate is provided with a clamping pin, the clamping pin extends towards the bottom of the shell and extends to the rolling groove, and the bottom of the clamping pin is abutted to the rolling groove.

Preferably, the cover plate comprises a limiting part, and the top of the capacitor core is arranged below the limiting part.

Preferably, the circular direct current support capacitor sealing structure further comprises a limiting plate arranged at the bottom of the shell, and the limiting plate abuts against the bottom of the capacitor core.

Compared with the prior art, the utility model has the advantages of as follows:

the utility model discloses a circular direct current supports condenser seal structure can improve the leakproofness of apron and casing, and then makes electric capacity core and external isolated, and then prevents that external moisture from getting into inside the casing, and then prevents that the moisture from influencing electric capacity core normal work, so the utility model discloses a circular direct current supports condenser and can use in multiple environment to better application scope has. On the other hand, the utility model discloses a circular direct current supports condenser seal structure can prevent that the apron from being washed away and fly to prevent the electronic component on every side of apron striking.

Drawings

Fig. 1 is a schematic view illustrating the disassembly of the sealing structure of the circular dc support capacitor provided by the present invention;

fig. 2 is a cross-sectional view of a circular dc support capacitor sealing structure provided by the present invention;

FIG. 3 is an enlarged schematic view at A of FIG. 2;

fig. 4 is another cross-sectional view of the circular dc support capacitor sealing structure provided by the present invention;

fig. 5 is an enlarged schematic view at B of fig. 4.

Wherein the reference numerals are:

the circuit board comprises a cover plate 2, a card pin 21, a concave part 211, a card shell 22, a limiting part 23, a shell 3, a fastening structure 31, a hook part 311, a salient point 32, a rolling groove 33, a capacitor core 4, a sealing ring 5 and a limiting plate 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, back, outer and inner … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

As shown in fig. 1, fig. 2 and fig. 3, a circular dc support capacitor with a sealing structure comprises a housing 3 for accommodating a capacitor core 4 and a cover plate 2 connected to the top of the housing 3, wherein the housing 3 comprises a fastening structure 31, the fastening structure 31 comprises a hook portion 311 inserted upside down into the cover plate 2 from the upper surface of the cover plate 2, one end of the cover plate 2 extends into a large groove formed by the hook portion 311, the housing 3 can fasten the cover plate 2 through the hook portion 311, the housing 3 comprises a bump 32, one end of the cover plate 2 is provided with a card pin 21, and the card pin 21 extends toward the bottom of the housing 3 and extends to the bump 32.

In the utility model discloses in, because the portion 311 that colludes of the portion 311 of fastening structure 31 inserts the portion 311 that colludes of apron 2 from the top of apron 2, and the one end of apron 2 extends to the portion 311 that colludes and forms big slot, so, the gap between reducible apron 2 and the casing 3, and then can reduce the outside moisture and get into the inside route of casing 3 to reduce the probability that outside moisture gets into the inside of casing 3. On the other hand, since the hook 311 of the fastening structure 31 is inserted into the hook 311 of the cover 2 from the upper surface of the cover 2, and one end of the cover 2 extends into the large groove formed by the hook 311, the cover 2 can be pressed down by the housing 3, and especially in the case of high temperature pressure generated inside the housing 3, the housing 3 can prevent the cover 2 from being blown away by the pressure, thereby preventing the cover 2 from damaging other electronic components.

In some embodiments, the cover plate 2 includes a snap ring 22, and the hook portion 311 is inserted upside down into the snap ring 22. Further, the snap ring 22 has the seal ring 5 placed therein, and the seal ring 5 and the hook portion 311 are pressed against each other. In this way, when the fastening structure 31 is inserted into the cover plate 2, the sealing ring 5 is compressed to improve the sealing between the fastening structure and the cover plate.

In some embodiments, the sealing ring 5 is a rubber ring.

In some embodiments, the cover plate 2 includes a stopper portion 23, and the top of the capacitor core 4 is disposed below the stopper portion 23. The utility model discloses in, spacing portion 23 can be with electric capacity core 4 restriction in casing 3, prevent that electric capacity core 4 from rocking and prevent that electric capacity core 4 from being washed away and fly.

In some embodiments, the circular dc-supported capacitor sealing structure further comprises a limiting plate 6 disposed at the bottom of the housing 3, the limiting plate 6 abutting against the bottom of the capacitor core 4. The utility model discloses in, limiting plate 6 can prevent that electric capacity core 4 from rocking and preventing that electric capacity core 4 from being washed away and flying with electric capacity core 4 restriction in casing 3.

In some embodiments, the clamping legs 21 include recesses 211 for mating with the bosses 32, such that the cover plate may be easily placed on the housing via the bosses and recesses. Meanwhile, the card pin 21 extends into the inside of the housing 3, which can increase the circulation path of moisture, thereby reducing the probability of moisture entering the inside of the housing 3.

In some embodiments, the fastening structure 31 may be formed by a crimping machine, and thus, may facilitate the fastening of the housing 3 and the cover 2. Specifically, the crimping machine crimps the upper end of the housing with the convex point 32 of the housing 3 as a crimping fixing point to form the fastening structure 31.

In some embodiments, the height of the capacitive core 4 is 103 mm.

In some embodiments, the distance between the hook 311 of the fastening structure and the peak 32 is 17.3 mm.

In some embodiments, as shown in fig. 4 and 5, the housing 3 includes a rolling groove 33 protruding toward the capacitor core 4, one end of the cover plate 2 is provided with a clamping pin 21, the clamping pin 21 extends toward the bottom of the housing 3 and extends to the rolling groove 33, and the bottom of the clamping pin 21 abuts against the rolling groove 33. In this way, the cover plate can be pushed against by the rolling groove 33.

Claims

1. A circular direct current supports condenser with seal structure, including the casing (3) that holds electric capacity core (4) and with apron (2) that casing (3) top is connected, its characterized in that:

the shell (3) comprises a fastening structure (31), the fastening structure (31) comprises a hook part (311) which is inserted into the cover plate (2) from the upper surface of the cover plate (2) in an inverted mode, the edge of the cover plate (2) extends into a groove formed by the hook part (311), and the shell (3) can fasten the cover plate (2) through the hook part (311).

2. The circular dc support capacitor sealing structure with a sealing structure according to claim 1, wherein: the cover plate (2) comprises a clamping ring (22), and the hook part (311) is reversely inserted into the clamping ring (22).

3. The circular dc support capacitor sealing structure with a sealing structure according to claim 2, wherein: a sealing ring (5) is placed in the clamping ring (22), and the sealing ring (5) and the hook part (311) are mutually extruded.

4. The circular dc support capacitor sealing structure with a sealing structure according to claim 3, wherein: the sealing ring (5) is a rubber ring.

5. The circular dc support capacitor sealing structure with a sealing structure according to claim 1, wherein: casing (3) are including convex bump (32) towards electric capacity core (4) direction, the one end of apron (2) is equipped with card pin (21), card pin (21) court the bottom of casing (3) extends and extends to bump (32) department, card pin (21) are including concave part (211), bump (32) with concave part (211) joint.

6. The circular dc support capacitor sealing structure with a sealing structure according to claim 1, wherein: the shell (3) comprises a rolling groove (33) protruding towards the capacitor core (4),

the one end of apron (2) is equipped with card pin (21), card pin (21) court the bottom of casing (3) extends and extends to channelling (33) department, the bottom of card pin (21) with channelling (33) offset.

7. The circular dc support capacitor sealing structure with a sealing structure according to claim 1, wherein: the cover plate (2) comprises a limiting part (23), and the top of the capacitor core (4) is arranged below the limiting part (23).

8. The circular dc support capacitor sealing structure with a sealing structure according to claim 1, wherein: the circular direct current support capacitor sealing structure further comprises a limiting plate (6) arranged at the bottom of the shell (3), and the limiting plate (6) is abutted to the bottom of the capacitor core (4).