CN204407146U - The single-phase rewinding material of a kind of transformer with oil duct - Google Patents

Abstract

The utility model discloses a transformer single-phase wound iron core with an oil passage, which is mainly composed of no less than two iron core frames, and heat dissipation oil passages are arranged between each iron core frame, and the heat dissipation oil passages include insulating tapes and multiple Insulation spacers pasted on the insulation tape at intervals. The utility model not only improves the heat dissipation performance of the iron core, but also effectively improves the insulation performance of the transformer iron core, reduces deformation caused by temperature changes during use, and effectively improves the mechanical strength of the iron core.

Description

A transformer single-phase wound core with an oil passage

technical field

The utility model relates to the technical field of transformers, in particular to a transformer single-phase wound iron core with an oil channel.

Background technique

At present, most of the cores of traditional single-phase transformers use laminated or wound cores. Since the single-phase laminated core is formed by cutting and stacking the core pieces one by one, the direction of the magnetic flux flow of the core is inconsistent with the direction of the magnetic circuit, and there are many These factors will affect the performance of the core. The single-phase wound core is completed by continuous winding of several whole silicon steel sheets. The magnetic flux flow direction of the core is completely consistent with the magnetic circuit direction, which improves the performance of the single-phase wound core. Therefore, the performance of the single-phase wound core is better than that of the single-phase stacked core. excellent. However, as the capacity of the transformer increases, the core loss of the single-phase wound core will also increase, and the single-phase iron core column or iron yoke is composed of a conductive tape, and the conductive tape is tightly wound between the conductive tape. When the core loss increases When the temperature of the iron core is too high, the winding insulation or other insulating parts around the iron core will age. At the same time, the liquid used to cool the transformer will age and deteriorate, seriously affecting the service life of the transformer, and even causing the transformer to fail.

Utility model content

In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a transformer single-phase wound iron core with an oil channel, which can improve the heat dissipation performance of the iron core and effectively improve the insulation performance of the transformer iron core.

The technical scheme that the utility model adopts for solving its technical problem is:

A transformer single-phase wound core with an oil channel, including a single-column or multi-column wound core composed of several single frames, each single frame is composed of two core frames, and the gap between the two core frames is A heat dissipation oil passage is provided, and the heat dissipation oil passage includes an insulating tape and a plurality of insulating spacers pasted on the insulating tape at intervals.

Further, the shape of the insulating strip coincides with the shape of the iron core frame, and the shape of the insulating spacer is strip.

Further, each iron core frame is formed by continuous rolling of silicon steel sheets.

Further, the core frame is a rectangular frame, and the cross section of the rectangular frame is approximately semicircular.

The beneficial effects of the utility model are: the utility model adopts a transformer single-phase wound iron core with an oil channel, which not only improves the heat dissipation performance of the core, but also can effectively improve the insulation performance of the transformer core, and reduce the damage caused by temperature changes during use. deformation, which effectively improves the mechanical strength of the core; at the same time, since the core is equipped with heat dissipation oil passages, when manufacturing a single-phase wound core, the iron core is first divided into several core frames, and then heat dissipation oil passages are placed between the core frames, and finally several This single-phase wound core is assembled from two core frames. This core manufacturing method, which is first disassembled and then assembled, effectively reduces the difficulty of manufacturing the entire single-phase wound core, especially for single-phase large-capacity transformer cores with voltage levels of 110kV and above. , the single core of such a product is basically more than 10 tons, even up to 100 tons. If the conventional single-phase coil core manufacturing method is adopted, it is extremely difficult to manufacture, but if the utility model is adopted, it not only ensures the heat dissipation effect of the core, but also reduces The manufacturing difficulty of the iron core improves the manufacturing efficiency of the single-phase wound iron core.

Description of drawings

Below in conjunction with accompanying drawing and example the utility model is described further.

Fig. 1 is a three-dimensional structural schematic diagram of a single-column wound core;

Fig. 2 is a side view of a single-column coiled core;

Fig. 3 is a top view of a single-column wound core;

Fig. 4 is a cylindrical cross section of the core frame;

Figure 5 is a front view of the cooling oil passage;

Figure 6 is a top view of the cooling oil passage;

Fig. 7 is a schematic diagram of a three-dimensional structure of a multi-column wound core;

Fig. 8 is a top view of a multi-column wound core.

Detailed ways

Referring to Fig. 1-Fig. 8, a transformer single-phase wound core with an oil channel of the present utility model includes a single-column or multi-column wound core 1 composed of several single frames, as shown in Fig. 1 to Fig. 3 . Phase single-column wound core, Figure 7 and Fig. 8 show single-phase three-column wound core. Each single frame is composed of two iron core frames 3, and each iron core frame 3 is made of silicon steel sheets, which ensures that the magnetic flux flow direction of the iron core is consistent with the direction of the magnetic circuit, so that the performance of the iron core can be fully exerted , and there is no seam in the entire magnetic circuit, so the magnetic resistance is greatly reduced, reducing the no-load current and no-load loss of the core. Further, the core frame 3 is a rectangular frame, and the cross section of the rectangular frame is approximately semicircular.

A heat dissipation oil passage 2 is arranged between the two core frames 3 , and the heat dissipation oil passage 2 includes an insulating tape 21 and a plurality of insulating pads 22 pasted on the insulating tape 21 at intervals. Wherein the shape of the insulating strip 21 coincides with that of the core frame 3 , and the insulating spacer 22 is in the shape of a bar. The insulation block 22 of the utility model is processed into a corresponding thickness according to the heat dissipation requirements of the iron core, and then bonded on the insulating tape 21, and finally the heat dissipation oil passage 2 is placed between each iron core frame 3, and the heat dissipation oil passage 2 is placed after the placement is completed. Several independent iron core frames 3 are assembled to form a complete iron core.

The utility model can not only improve the heat dissipation performance of the iron core, but also effectively improve the insulation performance of the transformer iron core, reduce the deformation caused by temperature changes during use, and effectively improve the mechanical strength of the iron core; When manufacturing a single-phase wound core, first divide the core into several core frames, then place heat dissipation oil passages between the core frames, and finally assemble several core frames 3 into this single-phase wound core, which is disassembled and then assembled The iron core manufacturing method effectively reduces the difficulty of manufacturing the entire single-phase wound iron core, especially the iron core of a single-phase large-capacity transformer with a voltage level of 110kV and above. The single iron core of such a product is basically more than 10 tons, or even 100 tons. If It is extremely difficult to manufacture conventional single-phase wound iron cores, but the utility model not only ensures the cooling effect of the iron core, but also reduces the manufacturing difficulty of the iron cores, and effectively improves the manufacturing efficiency of the single-phase wound iron cores.

The above is only a preferred embodiment of the utility model, and the utility model is not limited to the above-mentioned embodiment, as long as it achieves the technical effect of the utility model by the same means, it should belong to the protection scope of the utility model.

Claims (4)

1. the single-phase rewinding material of the transformer with oil duct, it is characterized in that: comprise the open side type or polystyle rewinding material (1) that are made up of several single frames, each single frame is put together by the iron core frame (3) of two, be provided with heat radiation oil duct (2) between two iron core frames (3), described heat radiation oil duct (2) comprises insulating tape (21) and multiple interval and is pasted onto cross-over block (22) on insulating tape (21).

2. the single-phase rewinding material of a kind of transformer with oil duct according to claim 1, it is characterized in that: described insulating tape (21) overlaps with the shape of iron core frame (3), described cross-over block (22) is strip.

3. the single-phase rewinding material of a kind of transformer with oil duct according to claim 1, is characterized in that: each iron core frame (3) is rolled continuously by silicon steel sheet and forms.

4. the single-phase rewinding material of a kind of transformer with oil duct according to claim 3, it is characterized in that: described iron core frame (3) is rectangle frame, the cross section of described rectangle frame is approximate half-circular.