CN206471192U - New coil oil flow control structures - Google Patents

Abstract

The application is related to a kind of coil oil flow control structures, characterized in that, it is described include be arranged on the external diameter of coil side it is upper and with axial oil duct outside the coil for the transformer oil that circulates, be arranged between coil and with axial oil duct connects and made transformer oil flow direction to be carried out along helix in coil horizontal oil duct device；The horizontal oil duct device is set to include interior gear oilpaper circle, outer gear oilpaper circle；Axial oil duct is arranged on the external diameter side of coil outside the coil；The middle position of the coil is provided with coil internal oil channel；The coil width to middle part be provided with coil axial oil duct；Outside the coil in axial oil duct, coil outer diameter side is provided with outer gear oilpaper circle, and the gear oilpaper circle exteenal reflux area arranged in parallel for forming array outside；Axial oil duct in the coil internal oil channel, coil, horizontal oil duct device, axial oil duct constitutes an oil flow channel outside coil.

Description

New Coil Oil Flow Control Structure

technical field

The utility model relates to a novel coil oil flow control structure, which belongs to the manufacturing technology of transformer products.

Background technique

With the development of the power grid, the proportion of low-loss and large-capacity transformers in 220kV and above transformers is increasing, and the amplitude of transformer coils is also increasing. Whether the coil temperature rise can be effectively reduced has a great impact on the life of the transformer. . The traditional design structure is to alternately add oil retaining paper rings inside and outside the coil. Due to the large coil width, the internal oil resistance of the coil cannot achieve the effect of effectively reducing the temperature rise of the coil. In order to change the deficiencies of the traditional structure, a small oil channel (4.5mm~6mm) in the axial direction of the coil is added on the basis of alternately called oil retaining paper rings inside and outside the coil. This structure does not change the structure of oil entering the coil, and the passage of oil entering and exiting the coil is small. , will affect the reduction of coil temperature rise.

Utility model content

The problem to be solved by the utility model is to propose an improvement plan or a replacement plan for the above-mentioned shortcomings in the prior art, especially a coil oil flow control that changes the oil flow structure, increases the transformer oil flow, and reduces the internal oil resistance of the coil. structure.

Technical solution: A coil oil flow control structure, characterized in that the said coil is arranged on the outer diameter side of the coil and connected with the coil outer axial oil channel for circulating transformer oil, arranged between the coils and connected with the coil The horizontal oil passage device that communicates with the inner axial oil passage and makes the transformer oil flow along the helix; the horizontal oil passage device is set to include an inner oil retaining paper ring and an outer oil retaining paper ring; the outer axial oil passage of the coil It is arranged on the outer diameter side of the coil; the central position of the coil is provided with a coil inner oil passage; the middle part of the coil width is provided with a coil inner axial oil passage; the outer axial oil passage of the coil is located outside the coil The outer oil retaining paper ring is arranged on the radial side, and the outer oil retaining paper rings are arranged parallel to each other to form an outer return area of the array; the inner oil passage of the coil, the inner axial oil passage of the coil, the transverse oil passage device, and the outer axial oil passage of the coil are composed An oil flow channel.

Further, according to the coil oil flow control structure of the above-mentioned design scheme, it is characterized in that the oil passage in the coil communicates with the axial oil passage in the coil, and a return-type oil passage is formed inside the coil.

Further, according to the coil oil flow control structure of the above design scheme, it is characterized in that, in the inner axial oil passage of the coil, an inner oil retaining paper ring is arranged on the side of the inner diameter of the coil, and the inner oil retaining paper rings are arranged in parallel to each other to form an inner array. recirculation zone.

Further, according to the coil oil flow control structure of the above design scheme, it is characterized in that an oil inlet is provided in the middle of the coil end ring; a heat exchange plate is arranged between the coil inner oil passage and the coil inner axial oil passage separated.

Further, according to the coil oil flow control structure of the above design scheme, it is characterized in that the coil inner axial oil outlet is provided in the middle of the width direction of the coil end ring; the inner axial oil outlet of the coil is connected with the inner coil The axial oil passage is connected; the outer diameter side of the coil is provided with an outer axial oil outlet of the coil; the outer axial oil outlet of the coil is connected with the outer axial oil passage of the coil.

In the coil oil flow control structure of the present application, the coil inner axial oil channel is added in the middle of the coil width. The inner diameter of the inner axial oil channel of the coil is preferably 12mm. The backing plate) is provided with an oil inlet and outlet in the middle.

Beneficial effects: the new structural design can reduce the size of the oil flow in the width direction of the coil and increase the size of the oil channel in the axial direction of the coil. Through this structure, the oil flow of the coil can be increased and the oil resistance of the coil can be reduced, so as to effectively reduce the temperature rise of the coil and prolong the transformer life. life.

The coil oil flow control structure of this application has two kinds of channel structures, one is that the oil channel in the coil is the oil inlet channel, and then passes through the axial oil channel in the coil, because the oil channel in the coil and the axial oil channel in the coil Only the heat exchange plate is used to separate the transformer oil from the oil channel in the coil and the transformer oil in the axial oil channel in the coil to exchange heat energy, which improves the work efficiency and effectively reduces the heating speed of the coil, and the transformer oil enters the coil After the axial oil passage, it flows through the horizontal oil passage device to the outer axial oil passage of the coil, and finally flows out from the outer axial oil passage of the coil. The other is that the oil passage in the coil is the oil inlet passage, and then enters the axial oil passage in the coil, where it is divided into two routes, one enters the axial oil passage outside the coil through the horizontal oil passage device, and the other enters the axial oil passage in the coil. The inner axial oil outlet of the coil at the end of the channel is discharged, and the purpose of this design is to increase the flow rate of transformer oil. After increasing the flow rate of transformer oil, the energy exchange must be accelerated. At the same time, the sectional area of the oil inlet of the coil oil flow control structure of the present application is greater than the sum of the sectional areas of the oil outlets. Such a design is to ensure the oil pressure in the axial oil passage in the coil, thereby ensuring the flow rate of the transformer oil and the speed at which the transformer oil enters the axial oil passage outside the coil through the transverse oil passage device.

Description of drawings

FIG. 1 is a structural schematic diagram of a coil oil flow control structure.

Among them, 1 is the inner oil channel of the coil, 2 is the inner axial oil channel of the coil, 3 is the outer axial oil channel of the coil, 4 is the oil inlet, 5 is the inner axial oil outlet of the coil, and 6 is the outer axial outlet of the coil. Oil port, 7 are inner oil retaining paper rings, 8 are outer oil retaining paper rings, and 9 are heat exchange plates.

detailed description

The structure of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1: A coil oil flow control structure, which includes an oil channel 3 arranged on the outer diameter side of the coil and connected to the outer axial direction of the coil for circulating transformer oil, arranged between the coils and connected to the inner shaft of the coil A horizontal oil passage device that communicates with the oil passage 2 and makes the flow direction of the transformer oil along a helical line; the horizontal oil passage device is set to include an inner oil retaining paper ring 7 and an outer oil retaining paper ring 8; the outer axial oil of the coil The channel 3 is arranged on the outer diameter side of the coil; the coil inner oil channel 1 is provided at the central position of the coil; the coil inner axial oil channel 2 is provided at the middle part of the coil width; the coil outer axial oil channel 3, an outer oil retaining paper ring 8 is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings 8 are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage 1, the coil inner axial oil passage 2, the transverse oil passage The channel device and the coil outer axial oil channel 3 form an oil flow channel.

Embodiment 2: A coil oil flow control structure, which includes an oil channel 3 arranged on the outer diameter side of the coil and connected to the outer axis of the coil for circulating transformer oil, arranged between the coils and connected to the inner axis of the coil A horizontal oil passage device that communicates with the oil passage 2 and makes the flow direction of the transformer oil along a helical line; the horizontal oil passage device is set to include an inner oil retaining paper ring 7 and an outer oil retaining paper ring 8; the outer axial oil of the coil The channel 3 is arranged on the outer diameter side of the coil; the coil inner oil channel 1 is provided at the central position of the coil; the coil inner axial oil channel 2 is provided at the middle part of the coil width; the coil outer axial oil channel 3, an outer oil retaining paper ring 8 is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings 8 are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage 1, the coil inner axial oil passage 2, the transverse oil passage The channel device and the coil outer axial oil channel 3 form an oil flow channel, the coil inner oil channel 1 communicates with the coil inner axial oil channel 2, and forms a return type oil channel inside the coil.

Embodiment 3: A coil oil flow control structure, which includes an oil channel 3 arranged on the outer diameter side of the coil and connected to the outer axial direction of the coil for circulating transformer oil, arranged between the coils and connected to the inner shaft of the coil A horizontal oil passage device that communicates with the oil passage 2 and makes the flow direction of the transformer oil along a helical line; the horizontal oil passage device is set to include an inner oil retaining paper ring 7 and an outer oil retaining paper ring 8; the outer axial oil of the coil The channel 3 is arranged on the outer diameter side of the coil; the coil inner oil channel 1 is provided at the central position of the coil; the coil inner axial oil channel 2 is provided at the middle part of the coil width; the coil outer axial oil channel 3, an outer oil retaining paper ring 8 is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings 8 are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage 1, the coil inner axial oil passage 2, the transverse oil passage The channel device and the coil outer axial oil channel 3 form an oil flow channel. The coil inner oil channel 1 communicates with the coil inner axial oil channel 2 and forms a return type oil channel inside the coil. The coil inner axial oil channel Inside the track 2, an inner oil-repelling paper ring 7 is arranged on the side of the inner diameter of the coil, and the inner oil-repelling paper rings 7 are arranged in parallel with each other to form an inner return area of an array.

Embodiment 4: A coil oil flow control structure, which includes an oil channel 3 arranged on the outer diameter side of the coil and connected to the outer axial direction of the coil for circulating transformer oil, arranged between the coils and connected to the inner shaft of the coil A horizontal oil passage device that communicates with the oil passage 2 and makes the flow direction of the transformer oil along a helical line; the horizontal oil passage device is set to include an inner oil retaining paper ring 7 and an outer oil retaining paper ring 8; the outer axial oil of the coil The channel 3 is arranged on the outer diameter side of the coil; the coil inner oil channel 1 is provided at the central position of the coil; the coil inner axial oil channel 2 is provided at the middle part of the coil width; the coil outer axial oil channel 3, an outer oil retaining paper ring 8 is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings 8 are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage 1, the coil inner axial oil passage 2, the transverse oil passage The channel device and the coil outer axial oil channel 3 form an oil flow channel. The coil inner oil channel 1 communicates with the coil inner axial oil channel 2, and forms a return-type oil channel inside the coil. The middle part of the coil end ring An oil inlet 4 is provided; the coil inner oil passage 1 and the coil inner axial oil passage 2 are separated by a heat exchange plate 9 .

Embodiment 5: A coil oil flow control structure, which includes an oil channel 3 arranged on the outer diameter side of the coil and connected to the outer axial direction of the coil for circulating transformer oil, arranged between the coils and connected to the inner shaft of the coil A horizontal oil passage device that communicates with the oil passage 2 and makes the flow direction of the transformer oil along a helical line; the horizontal oil passage device is set to include an inner oil retaining paper ring 7 and an outer oil retaining paper ring 8; the outer axial oil of the coil The channel 3 is arranged on the outer diameter side of the coil; the coil inner oil channel 1 is provided at the central position of the coil; the coil inner axial oil channel 2 is provided at the middle part of the coil width; the coil outer axial oil channel 3, an outer oil retaining paper ring 8 is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings 8 are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage 1, the coil inner axial oil passage 2, the transverse oil passage The channel device and the coil outer axial oil channel 3 form an oil flow channel. The coil inner oil channel 1 communicates with the coil inner axial oil channel 2, and forms a return-type oil channel inside the coil. The width of the coil end ring The middle part of the coil is provided with a coil inner axial oil outlet 5; the coil inner axial oil outlet 5 communicates with the coil inner axial oil passage 2; the outer diameter side of the coil is provided with a coil outer axial oil outlet 6. The coil outer axial oil outlet 6 communicates with the coil outer axial oil passage 3 .

Although the utility model has been disclosed as above with preferred embodiments, they are not used to limit the utility model. Any person familiar with the art can make various changes or modifications without departing from the spirit and scope of the utility model. modification, so the protection scope of the present utility model shall be defined by the protection scope of the claims of the present application.

Claims (5)

1. A coil oil flow control structure, characterized in that the coil oil flow control structure includes a coil that is arranged on the outer diameter side of the coil and is used for circulating transformer oil. The coil outer axial oil passage is arranged between the coil The horizontal oil passage device is connected with the inner axial oil passage of the coil and makes the flow direction of the transformer oil along the helix; the horizontal oil passage device is set to include an inner oil retaining paper ring and an outer oil retaining paper ring; the coil outer The axial oil passage is arranged on the outer diameter side of the coil; the coil inner oil passage is provided at the central position of the coil; the coil inner axial oil passage is arranged at the middle part of the coil width; the coil outer axial oil passage is , an outer oil retaining paper ring is arranged on the side of the outer diameter of the coil, and the outer oil retaining paper rings are arranged in parallel with each other to form an outer return area of the array; the coil inner oil passage, the coil inner axial oil passage, the transverse oil passage device, and the coil outer shaft Form an oil flow channel to the oil passage. 2 . The coil oil flow control structure according to claim 1 , wherein the coil inner oil passage communicates with the coil inner axial oil passage, and forms a return-type oil passage inside the coil. 3 . 3. The coil oil flow control structure according to claim 1, characterized in that, in the inner axial oil passage of the coil, an inner oil retaining paper ring is arranged on the side of the inner diameter of the coil, and the inner oil retaining paper rings are arranged in parallel with each other to form an array of inner recirculation zone. 4. The coil oil flow control structure according to claim 1, characterized in that, the middle part of the coil end ring is provided with an oil inlet; the oil passage in the coil and the axial oil passage in the coil are connected by a heat exchange plate separated. 5. The coil oil flow control structure according to claim 1, wherein the coil inner axial oil outlet is provided in the middle of the width direction of the coil end ring; the inner axial oil outlet of the coil is connected with the inner coil The axial oil passage is connected; the outer diameter side of the coil is provided with an outer axial oil outlet of the coil; the outer axial oil outlet of the coil is connected with the outer axial oil passage of the coil.