Direct current capacitor for rail transit

Abstract

The utility model relates to a DC capacitor for rail transit, the shell (1) is cuboid structure, the top of shell (1) is equipped with the cover plate (2), the cover plate (2) is fixedly connected with shell (1) through bolt, the cover plate (2) is equipped with the binding post (3), the capacitor core (4) sets up inside shell (1), and is fixed through the insulating support (5), the radiating fin (6) evenly distributes in the outer surface of shell (1), the radiating fan (7) is installed in one side of shell (1), and is communicated with the inside of shell (1) through the air duct, the heat -conducting silica gel (8) fills in between capacitor core (4) and shell (1), and the heat that capacitor core (4) generates is conducted to shell (1) fast, and then is radiated through the radiating fin (6), the shock attenuation rubber pad (9) sets up between capacitor core (4) and insulating support (5), the rubber pad (10) sets up in the bottom of shell (1), the utility model discloses can reduce the working temperature of capacitor fast and effectively, thereby improves the performance and the service life of capacitor.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a DC capacitor for rail transit. Background Technology

[0002] In rail transit systems, DC capacitors play a crucial role, such as in energy storage, filtering, and power compensation. However, existing DC capacitors used in rail transit have some shortcomings in practical applications. Firstly, capacitors generate a significant amount of heat during operation; if heat dissipation is insufficient, the capacitor temperature can become excessively high, affecting its performance and lifespan, and potentially even causing safety accidents. Secondly, existing capacitor structures do not perform well in terms of seismic resistance; vibrations generated during rail transit operation can easily loosen internal components, thus affecting their stability and reliability. Utility Model Content

[0003] The purpose of this invention is to provide a DC capacitor for rail transit, which solves the problems of poor heat dissipation and poor shock resistance of existing capacitors, and improves the performance, stability and service life of the capacitor.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A DC capacitor for rail transit includes a housing 1, a capacitor core 4, a heat dissipation assembly, and a shock-resistant assembly; wherein;

[0006] Outer shell 1: The outer shell 1 is a cuboid structure. The top of the outer shell 1 is provided with a cover plate 2. The cover plate 2 is fixedly connected to the outer shell 1 by bolts. The cover plate 2 is provided with a wiring terminal 3.

[0007] Capacitor core 4: The capacitor core 4 is disposed inside the outer casing 1 and is fixed by an insulating bracket 5;

[0008] Heat dissipation assembly: The heat dissipation assembly includes heat dissipation fins 6, cooling fan 7 and thermally conductive silicone 8; the heat dissipation fins 6 are evenly distributed on the outer surface of the outer shell 1; the cooling fan 7 is installed on one side of the outer shell 1 and communicates with the inside of the outer shell 1 through an air duct; the thermally conductive silicone 8 is filled between the capacitor core 4 and the outer shell 1, so as to quickly conduct the heat generated by the capacitor core 4 to the outer shell 1, and then dissipate it through the heat dissipation fins 6.

[0009] Anti-vibration component: The anti-vibration component includes a shock-absorbing rubber pad 9 and a rubber pad 10; the shock-absorbing rubber pad 9 is disposed between the capacitor core 4 and the insulating support 5; the rubber pad 10 is disposed at the bottom of the outer casing 1.

[0010] This utility model also has the following additional technical features:

[0011] As a further specific optimization of the technical solution of this utility model: the capacitor core 4 is composed of multiple capacitor units connected in series or in parallel, and the capacitor units are made of high-performance capacitor materials.

[0012] As a further specific optimization of the technical solution of this utility model: the heat dissipation fins 6 are made of aluminum alloy and are connected to the outer shell 1 by welding.

[0013] As a further specific optimization of the technical solution of this utility model: the rubber pad 10 is made of highly elastic rubber material.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] Significantly improved heat dissipation performance: By setting up heat dissipation fins 6, cooling fan 7 and thermal conductive silicone 8, the heat generated by capacitor core 4 can be dissipated quickly and effectively, reducing the operating temperature of the capacitor, thereby improving the performance and lifespan of the capacitor.

[0016] Enhanced seismic performance: The installation of shock-absorbing rubber pads 9 and 10 can effectively buffer and absorb vibrations generated during rail transit operation, reduce the impact of vibrations on capacitor core 4, and improve the stability and reliability of the capacitor.

[0017] Simple structure and easy to manufacture: The structure of this utility model is reasonable, and the components are closely connected, which facilitates manufacturing and installation and reduces production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Cover plate; 3. Terminal block; 4. Capacitor core; 5. Support bracket; 6. Heat sink fins; 7. Heat sink fan; 8. Thermal conductive silicone; 9. Shock-absorbing rubber pad; and 10. Rubber pad. Detailed Implementation

[0020] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0021] A DC capacitor for rail transit includes a housing 1, a capacitor core 4, a heat dissipation component, and a shock-resistant component.

[0022] Housing 1: The housing 1 is a cuboid structure made of high-strength aluminum alloy, which has good heat dissipation performance and mechanical strength. The top of the housing 1 is provided with a cover plate 2, which is fixedly connected to the housing 1 by bolts. The cover plate 2 is provided with a terminal block 3 for connecting to an external circuit.

[0023] Capacitor core 4: The capacitor core 4 is disposed inside the outer casing 1 and fixed by an insulating bracket 5. The capacitor core 4 is composed of multiple capacitor units connected in series or parallel. The capacitor units use high-performance capacitor materials and have the characteristics of high capacity and low loss.

[0024] Heat dissipation assembly: The heat dissipation assembly includes heat sink fins 6, a cooling fan 7, and thermally conductive silicone 8. The heat sink fins 6 are evenly distributed on the outer surface of the housing 1, made of aluminum alloy, and connected to the housing 1 by welding, increasing the heat dissipation area. The cooling fan 7 is installed on one side of the housing 1 and communicates with the interior of the housing 1 through an air duct to accelerate airflow and improve heat dissipation efficiency. The thermally conductive silicone 8 is filled between the capacitor core 4 and the housing 1, quickly conducting the heat generated by the capacitor core 4 to the housing 1, and then dissipating it through the heat sink fins 6.

[0025] Seismic Components: The seismic components include a damping rubber pad 9 and a rubber pad 10. The damping rubber pad 9 is disposed between the capacitor core 4 and the insulating support 5 to buffer the impact of vibration on the capacitor core 4. The rubber pad 10 is disposed at the bottom of the outer shell 1 and is made of highly elastic rubber material to further absorb and buffer vibrations generated during rail transit operation.

[0026] Assembly process of a DC capacitor for rail transit:

[0027] The capacitor core 4 is mounted on the insulating bracket 5, and a shock-absorbing rubber pad 9 is installed between the capacitor core 4 and the insulating bracket 5 to provide cushioning. Thermally conductive silicone 8 is filled inside the outer casing 1, and then the insulating bracket 5 with the capacitor core 4 installed is placed inside the outer casing 1, ensuring the thermally conductive silicone 8 fully fills the space between the capacitor core 4 and the outer casing 1 to ensure good heat conduction. The heat sink fins 6 are welded to the outer surface of the outer casing 1, ensuring a secure connection between the heat sink fins 6 and the outer casing 1. A cooling fan 7 is installed on one side of the outer casing 1, and the air duct is connected to ensure airflow communication with the interior of the outer casing 1. A rubber pad 10 is installed at the bottom of the outer casing 1 to further enhance shock resistance. The cover plate 2 is fixed to the top of the outer casing 1 with bolts, and the terminal blocks 3 are installed, completing the assembly of the entire capacitor.

[0028] The working process of a DC capacitor used in rail transit:

[0029] When the capacitor is working, the capacitor core 4 generates heat. This heat is conducted to the outer casing 1 via the thermally conductive silicone 8, and then dissipated into the surrounding environment by the heat dissipation fins 6 on the outer casing 1. Simultaneously, the cooling fan 7 starts, accelerating airflow and quickly carrying away the heat, thus effectively reducing the capacitor's temperature. During rail transit operation, some of the vibrations generated are first absorbed by the rubber pad 10 at the bottom, and the remaining vibrations are further buffered by the shock-absorbing rubber pad 9, reducing the impact on the capacitor core 4 and ensuring stable capacitor operation.

[0030] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

Claims

1. A DC capacitor for rail transit, characterized in that: Includes a housing (1), a capacitor core (4), a heat dissipation assembly, and a shock-resistant assembly; in; Outer shell (1): The outer shell (1) is a cuboid structure. The top of the outer shell (1) is provided with a cover plate (2). The cover plate (2) is fixedly connected to the outer shell (1) by bolts. The cover plate (2) is provided with wiring terminals (3). Capacitor core (4): The capacitor core (4) is disposed inside the outer casing (1) and fixed by an insulating bracket (5); Heat dissipation assembly: The heat dissipation assembly includes heat dissipation fins (6), a cooling fan (7), and thermally conductive silicone (8); the heat dissipation fins (6) are evenly distributed on the outer surface of the outer shell (1); the cooling fan (7) is installed on one side of the outer shell (1) and communicates with the inside of the outer shell (1) through an air duct; the thermally conductive silicone (8) is filled between the capacitor core (4) and the outer shell (1) to quickly conduct the heat generated by the capacitor core (4) to the outer shell (1), and then dissipate it through the heat dissipation fins (6); The shock-absorbing component includes a shock-absorbing rubber pad (9) and a rubber pad (10); the shock-absorbing rubber pad (9) is disposed between the capacitor core (4) and the insulating support (5); the rubber pad (10) is disposed at the bottom of the outer shell (1).

2. The DC capacitor for rail transit according to claim 1, characterized in that: The capacitor core (4) is composed of multiple capacitor units connected in series or in parallel, and the capacitor units are made of high-performance capacitor materials.

3. The DC capacitor for rail transit according to claim 1, characterized in that: The heat dissipation fins (6) are made of aluminum alloy and are connected to the outer shell (1) by welding.

4. The DC capacitor for rail transit according to claim 1, characterized in that: The rubber pad (10) is made of a highly elastic rubber material.

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