Power capacitor and vibration and noise reduction device thereof

Abstract

The invention provides a power capacitor and a vibration and noise reduction device thereof, and the vibration and noise reduction device is arranged between a capacitor core and a box body in a manner of being corresponding to the upper and lower end faces of the capacitor core, and comprises a core bracket for supporting the capacitor core, a bottom plate arranged on a box body, and a pluralityof vibration isolation devices arranged between the core bracket and the bottom plate. Each vibration isolation device comprises a sleeve fixedly installed on a bottom plate and provided with a hollowpipe cavity; a spring piece which is made of an elastic material and covers the tube cavity, wherein the edge of the spring piece is fixedly arranged on the sleeve, and a matching structure is arranged in the middle area surrounded by the edge; a connecting shaft which is matched with the matching structure, wherein the top end is connected with the core bracket. The spring piece has higher radial rigidity and lower axial rigidity, so that the problem that the original capacitor core is suspended and collided in oil is avoided; and a good vibration isolation and reduction effect is achieved through the structure and the viscous effect of oil, and finally the purpose of noise reduction is achieved.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a power capacitor and a vibration and noise reduction device thereof. Background technique [0002] With my country's continuous investment in and research and development of high-voltage and ultra-high voltage transmission projects, more and more high-voltage and ultra-high voltage transmission projects have been approved for construction. In the entire high-voltage and extra-high voltage transmission system, the converter station is a very important link, and the power capacitor is an important part of the converter station. The test results of the power capacitor noise test show that the radiated noise of a single power capacitor can reach more than 60dB(A) under simulated working conditions, and the radiated noise of all the power capacitors in the entire converter station can reach more than 90dB(A). . As the environmental problems caused by noise are attracting mo...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the poor effect of noise reduction and vibration reduction in the prior art, and it is easy to produce the defect that the capacitor core is suspended in the oil and touches randomly, so as to provide a power capacitor and its vibration and noise reduction device

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