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Axial pre-tightening mechanism for transformer

A technology of axial preloading and transformers, applied in the field of transformers, can solve problems such as endangering the safe operation of the power grid, and achieve the effect of uniform force and consistent mechanical strength

Inactive Publication Date: 2012-10-10
CHANGSHU CHANGYUAN TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Harm the safe operation of the power grid

Method used

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  • Axial pre-tightening mechanism for transformer
  • Axial pre-tightening mechanism for transformer
  • Axial pre-tightening mechanism for transformer

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Embodiment Construction

[0012] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0013] see figure 1 with figure 2 , the embodiment of the present invention includes:

[0014] An axial pretension mechanism for a transformer, including an upper clamp 10, a pressure plate 50 and several compression points (not marked), each of which includes a reinforcement plate 20, a support plate 30 and a spacer 40, the The reinforcing plate 20 and the supporting plate 30 are connected with the upper clamping piece 10 , and the spacer 40 is located between the supporting plate 30 and the pressing plate 50 .

[0015] Preferably, the cushion block 40 is a laminated wood block.

[0016] Preferably, the spacer 40 has different specifications...

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Abstract

The invention discloses an axial pre-tightening mechanism for a transformer. The mechanism comprises an upper clamping piece, a pressure plate and a plurality of clamping points; each clamping point comprises a reinforced plate, a support plate and a cushion plate; the reinforced plate and the support plate are connected with the upper clamping piece; and the cushion block is arranged between the support plate and the pressure plate. With the adoption of the mechanism provided by the invention, the pressure plate of a transformer can be stressed uniformly; the mechanical strengths of various areas can be kept the same when the transformer is subjected to sudden short circuit, and no mechanical instability caused by certain weaken point exists.

Description

technical field [0001] The invention relates to the field of transformers, in particular to an axial pretension mechanism for transformers. Background technique [0002] At present, large and medium-sized oil-immersed transformers all use cake-shaped coils with elastic cardboard between the paper-wrapped wire segments. The existing pre-tensioning mechanisms are as follows: figure 1 As shown, it includes an upper clip 11 , a pressure plate 51 and a counter-pressure nail 21 , and the counter-pressure nail 21 presses the pressure plate 51 to achieve the effect of fastening the device body. However, the disadvantage of this structure is that the pre-tightening force of each operator's fastening nail is different and the pressure point is unbalanced, which leads to uneven local pressure of the three-phase winding or one of the independent windings, causing mechanical instability. After more than a dozen transformer hanging cores on site, it was found that 60% of the transformer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/30H01F27/00
Inventor 俞文明王建林冯向军
Owner CHANGSHU CHANGYUAN TRANSFORMER
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