CN103531355B - A kind of power capacitor with fuse vibration absorber - Google Patents

Abstract

The invention provides a kind of power capacitor with fuse vibration absorber, it is provided with capacitor casing (2), it is provided with binding post (1) at the top of capacitor casing (2), insulating oil (3) it is provided with in capacitor casing (2), described capacitor casing (2) is internal is from top to bottom sequentially provided with fuse folder (11), upper vibration absorber, capacitor body (4), lower vibration absorber and lower fuse folder (9), upper vibration absorber and lower vibration absorber are pressed on the top and bottom of capacitor body (4) by upper fuse folder (11) and lower fuse folder (9) respectively.

Description

A power capacitor with a core damping device

technical field

The invention belongs to electric power equipment vibration reduction technology in the field of electric engineering, and in particular relates to a power capacitor with a core vibration reduction device.

Background technique

The power capacitor is an important equipment in the power transmission and transformation system of the substation. Its main function is to compensate the reactive power of the line, improve the power factor to improve the power supply quality, limit the voltage rise, protect the electrical equipment, reduce line loss and maintain reactive power. balance. With the rapid development of my country's economy and the improvement of people's living standards, the scale of the power grid is gradually expanding, and the requirements for power quality are getting higher and higher. The application of power capacitor banks in power systems is becoming more and more extensive. In order to improve the power factor of the line, suppress the power frequency overvoltage of the system, and ensure the safe and stable operation of the system, power capacitors are indispensable equipment in substations.

Power capacitors in substations in actual operation will generate vibrations. The vibration of the power capacitor is generated by the capacitor core plate under the action of the applied voltage to generate regular mechanical vibration, which is transmitted to the shell through the fastening clip and insulating oil. The propagation of this kind of vibration is mainly along the two directions of the bottom and the outlet casing, while the side vibration is mainly transmitted by the fuel tank, and the vibration is not very prominent.

In order to solve the problem of capacitor vibration and related noise, most of the relevant Chinese patents only focus on the removal of noise, and some noise reduction measures have been studied. Although they have a certain effect on reducing the external noise of the capacitor device, they are not helpful to the weakening and isolation of the internal vibration of the capacitor. , can not fundamentally solve the vibration problem. The literature search shows that the research and development specifically for the vibration reduction of the compensation capacitor bank core of the substation power equipment is still blank, so the development of related power capacitors with internal vibration reduction devices has become an urgent need.

Contents of the invention

The invention provides a power capacitor with a core damping device, which is directly installed on the internal core of the capacitor after forming, which is simple and convenient, and has an obvious effect of isolating the vibration propagation in the direction of the capacitor base and the bushing, thereby reducing the overall Effect of capacitor device vibration.

The present invention adopts the following technical solutions: a power capacitor with a core damping device, which is provided with a capacitor box, a terminal is provided on the top of the capacitor box, and insulating oil is provided in the capacitor box. The inside of the capacitor box is provided with an upper core clamp, an upper vibration damping device, a capacitor core, a lower vibration damping device and a lower core clamp from top to bottom, and the upper core clamp and the lower core clamp respectively The upper damping device and the lower damping device are compressed on the upper end and the lower end of the capacitor core.

The upper vibration damping device includes an upper partition and an upper vibration-damping rubber pad from top to bottom, the upper partition and the upper vibration-damping rubber pad are matched, and the space between the upper partition and the upper vibration-damping rubber pad is Set on the upper end of the capacitor core after seamless adhesion. The lower vibration-damping device includes a lower vibration-damping rubber pad and a lower partition from top to bottom, the lower partition matches the lower vibration-damping rubber pad, and the space between the lower vibration-damping rubber pad and the lower partition is Set at the lower end of the capacitor core after seamless adhesion. The upper partition is set as a hollow steel plate, and the hollow part in the upper partition is filled with upper damping material. The upper damping material is a foamed aluminum vibration-isolation and noise-reduction material. The lower partition is set as a hollow steel plate, and the hollow part in the lower partition is filled with lower vibration-damping material. The lower vibration-absorbing material is a vibration-isolation and noise-reduction material made of foamed aluminum.

The present invention has the following beneficial effects: after adopting the above technical scheme, the present invention is equipped with a capacitor box and insulating oil, and an upper vibration damping device and a lower vibration damping device are installed at the upper and lower ends of the capacitor core, and the upper vibration damping device and the lower vibration damping device The vibration device includes the upper partition and the upper vibration-damping rubber pad and the lower partition and the lower vibration-damping rubber pad, and the upper partition and the upper vibration-damping rubber pad as well as the lower partition and the lower vibration-damping rubber pad play a role in weakening And the function of absorbing the internal vibration of the capacitor, and the present invention only changes the structure of the internal core clamp, does not affect the appearance structure of the capacitor, the design is reasonable, the structure is simple, the vibration damping effect is good, it can be used in the manufacture of power capacitors, and the economy is better , and at the same time, the present invention has a wide range of applications and can be applied to special environments such as high altitudes without affecting its performance and effect. In the present invention, after the upper partition and the lower partition are clamped by the fastening clip, the interior of the upper partition and the lower partition is a hollow part, which can reduce the vibration amplitude and absorb the internal vibration of the capacitor. effect. The invention is provided with an upper vibration-damping rubber pad and a lower vibration-damping rubber pad. The upper vibration-damping rubber pad and the lower vibration-damping rubber pad can weaken the vibration amplitude from the source, with low cost and quick effect, and the rubber pad has corrosion resistance, High temperature and high pressure and vibration isolation. Compatibility with capacitor oil, large elastic damping, and satisfactory aging during the life of the capacitor. The partition plate of the present invention is complete and without porosity, and the outside can be molded at one time, and its height and size are determined according to different capacitor specifications and capacities and core connection methods, so as to obtain the best vibration reduction effect. The upper partition and the lower partition of the present invention can also be filled with vibration-damping and noise-reducing materials in the inner hollow parts according to needs, so as to increase the effect of vibration-damping and noise-reducing.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the upper partition of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the lower partition of the present invention.

detailed description

In Fig. 1, the present invention provides a power capacitor with a core damping device, which is provided with a capacitor case 2, a terminal 1 is provided on the top of the capacitor case 2, and an insulating Oil 3, the interior of the capacitor case 2 is sequentially provided with an upper core clamp 11, an upper damping device, a capacitor core 4, a lower vibration damping device and a lower core clamp 9 from top to bottom, and the upper core The clamp 11 and the lower core clamp 9 press the upper and lower damping devices on the upper and lower ends of the capacitor core 4 respectively, and the upper damping device includes the upper partition from top to bottom 5 and the upper vibration-damping rubber pad 6. The thickness of the upper vibration-damping rubber pad 6 is 3-6mm. 3M glue is used to carry out seamless adhesion and then it is arranged on the upper end of the capacitor core 4. The 3M glue makes the upper partition 5 and the upper vibration-damping rubber pad 6 in a semi-liquid bonding state. In FIG. 2, the upper end of the present invention The partition plate 5 is set as a hollow steel plate, and the upper partition plate 5 is set as seamless. The upper partition plate 5 uses a mold to stamp the steel plate once, and its size is adjusted according to the series-parallel structure of the capacitor core 4. Its height The size and size are determined according to different capacitor specifications and capacities and core connection methods. The hollow part in the upper partition 5 is filled with an upper vibration-damping material 10, and the upper vibration-damping material 10 is a foamed aluminum vibration-isolation and noise-reduction material. The lower vibration damping device comprises the lower vibration damping rubber pad 7 and the lower partition plate 8 from top to bottom. 7 are matched, the lower vibration-absorbing rubber pad 7 and the lower partition 8 are seamlessly bonded and then set at the lower end of the capacitor core 4, and the lower partition 8 and the lower vibration-damping rubber pad 7 are sealed with 3M glue. After seamless adhesion, it is arranged on the lower end of the capacitor core 4, and the 3M glue makes the lower partition 8 and the lower vibration-damping rubber pad 7 in a semi-liquid bonding state. In Fig. 3, the lower partition 8 of the present invention is set It is a hollow steel plate, and the lower partition plate 8 is set to be seamless. The lower partition plate 8 is formed by stamping the steel plate with a mold, and its size is adjusted according to the series-parallel structure of the capacitor core 4. Its height and size vary according to different The capacitor specification and capacity and the core connection mode are determined, and the hollow part in the lower partition 8 is filled with the lower vibration damping material 12, and the lower vibration damping material 12 is a foamed aluminum vibration isolation and noise reduction material.

The invention can be used in general conventional substations as conventional compensation equipment, and can also be applied to large-scale power capacitor banks in direct current transmission projects.

Claims (1)

1. null1. the power capacitor with fuse vibration absorber，It is provided with capacitor casing (2)，It is provided with binding post (1) at the top of capacitor casing (2)，Insulating oil (3) it is provided with in capacitor casing (2)，It is characterized in that described capacitor casing (2) is internal and be from top to bottom sequentially provided with fuse folder (11)、Upper vibration absorber、Capacitor body (4)、Lower vibration absorber and lower fuse folder (9)，Upper vibration absorber and lower vibration absorber are pressed on the top and bottom of capacitor body (4) by upper fuse folder (11) and lower fuse folder (9) respectively，Described upper vibration absorber from top to bottom includes successively every dividing plate (5) and upper rubber damping pad (6)，On match every dividing plate (5) and upper rubber damping pad (6)，On between dividing plate (5) and upper rubber damping pad (6) for being arranged on the upper end of capacitor body (4) after seamless adhesion，Described lower vibration absorber from top to bottom include successively lower rubber damping pad (7) and under every dividing plate (8)，Under match every dividing plate (8) and lower rubber damping pad (7)，Lower rubber damping pad (7) and under between dividing plate (8) for being arranged on the lower end of capacitor body (4) after seamless adhesion，It is set to the steel plate of hollow every dividing plate (5) on described，It is filled with upper damping material (10) at upper hollow parts in dividing plate (5)，Described upper damping material (10) is foam aluminum vibration insulation and noise reduction material，It is set to the steel plate of hollow every dividing plate (8) under described，Under hollow parts in dividing plate (8) be filled with lower damping material (12)，Described lower damping material (12) is foam aluminum vibration insulation and noise reduction material.