CN203232777U - Dry-type transformer - Google Patents
Dry-type transformer Download PDFInfo
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- CN203232777U CN203232777U CN 201320245096 CN201320245096U CN203232777U CN 203232777 U CN203232777 U CN 203232777U CN 201320245096 CN201320245096 CN 201320245096 CN 201320245096 U CN201320245096 U CN 201320245096U CN 203232777 U CN203232777 U CN 203232777U
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Abstract
The utility model provides a dry-type transformer, which comprises a transformer shell, a transformer coil which is arranged in the transformer shell, and a cooling unit which is used for cooling the transformer coil, wherein the cooling unit comprises a fan and the fan is arranged outside the transformer shell. The dry-type transformer has the advantages that the installation, the maintenance and the replacement of the fan are facilitated, the cooling effect is good, the pertinence is strong and the continuity and the reliability of power supply of a power supply system are improved.
Description
Technical field
The utility model belongs to technical field of transformer manufacturing, is specifically related to a kind of dry-type transformer.
Background technology
As the important component part of distribution transformer, dry-type transformer is after last century, entered China the nineties, and progressively maturation also is widely used in every field gradually after the development of having experienced many decades, and industry size grows stronger day by day.In recent years, along with the development of China's modernization construction, the urban and rural power grids load constantly increases, and dry-type transformer is used widely in China, annual rapidly increasing up to the growth rate more than 20%, China has become one of country of dry-type transformer volume of production and marketing maximum in the world at present.
Than common oil-filled transformer; dry-type transformer insulate by means of air and cools off; therefore it not only possesses safety, environmental protection, plurality of advantages such as reliable; make that it can deep enough load center; for electric power system safe, reliable, energy-conservation provides strong guarantee; simultaneously; because dry-type transformer self has good thermal capacitance and complete day by day control, protection system; make it possess good overload performance, still can be safely under the overload condition, stable, good operation.Just because of the good overload performance of dry-type transformer, also make it in special industry such as subway, chemical industry, smelting and particular surroundings, can access more widely and use.
Operating dry-type transformer mainly dispels the heat to guarantee that by air the temperature rise of self can be not too high, to guarantee normal performance and the useful life of insulating material.Wherein the air cooling can be divided into natural air cooled again and the air-cooled dual mode of forced convection.Under the situation lower at the transformer operating load, that ambient temperature is not high, dry-type transformer generally all relies on the free convection of air to dispel the heat, and externally higher, the transformer of ambient temperature bears load when big, the air cooling way of nature can't satisfy the heat radiation needs of transformer, at this moment just need be equipped with a cover forced air cooling system to transformer, transformer be carried out the forced-ventilated air cooling reduce its operating temperature.Dry-type transformer in one's early years is because design temperature rise is lower; simultaneously general power load is all lower again, add with electric unit the protection of transformer self is required lower, therefore; transformer generally all adopts the free convection type of cooling, and equipment is not equipped with cooling blower yet simultaneously.Along with the increase year by year of power system load, the raising day by day that power consumer requires transformer safety in operation service life, at present, the dry-type transformer that capacity is bigger generally all has been equipped with the cooling protection system of being made up of temperature monitor and blower fan.
The outfit of blower fan; not only improved the overload performance of transformer greatly; simultaneously; when the ambient temperature in the external world can not resist factor to raise because of some; carry out the normal safe operation that the forced-ventilated air cooling still can guarantee transformer, therefore, for dry-type transformer; blower fan is an important cooling protection equipment, and aspects such as the continous-stable of its safe operation to transformer, electric power system, the service life of transformer have directly and significant effects.
The main heat of transformer comes from the operating heating of transformer coil, and therefore, the installation of blower fan is mainly considered transformer coil is carried out the forced-ventilated air cooling.The dry-type transformer primary structure of traditional outfit blower fan as shown in Figure 1 and Figure 2, blower fan 1 is installed in the inside of transformer housing 2, and is in the below of transformer coil 4.Wherein blower fan adopts the crossing current curtain formula blower fan of rectangular build.Adopt the dry-type transformer of this class blower fan mainly to have following drawback:
1. in the transformer production process, because the inner space of transformer case is limited, simultaneously should take into account the installation site of blower fan as much as possible near transformer coil, guarantee simultaneously to have enough insulation distances between itself and the transformer coil again, therefore difficulty is installed, simultaneously, increased the volume of transformer housing to a certain extent.
2. because the heating of the coil in the dry-type transformer is not equally distributed, the radiating condition at each position of coil is also different simultaneously, differs greatly with regard to the temperature that has caused each position of operating transformer coil like this.Operating transformer coil Temperature Distribution mainly contains following characteristics: for the high pressure winding, the two ends radiating condition of coil is good, temperature rise is low, coil middle part radiating condition is poor, heating simultaneously is more concentrated, therefore temperature is higher, and there is the situation of baking mutually, heating in the adjacent position of two phase coils simultaneously because radiating condition is poor, and the temperature at this position is the highest in the whole winding; For the low pressure winding, because present most of winding adopts paper tinsel around structure, inner simultaneously radiating condition is more even, so the temperature contrast of different parts does not have high-tension coil so serious.Traditional dry-type transformer normally is installed in 6 or 4 blower fan unifications the below of transformer coil, and the air quantity that makes the minimum place of coil temperature obtain is maximum on the contrary, and the highest position of temperature is owing to away from blower fan, can not get good forced-ventilated wind heat radiation.This shows that the air cooling way that adopts in the existing dry-type transformer is a kind of extensive type of cooling, is a kind of type of cooling targetedly that do not have.
3. transformer is in operation, and the running status of blower fan is unknowable.Because blower fan is installed in the inside of transformer housing, whether turn round and whether the blower fan running normally waits state for blower fan, all can't accomplish observation directly perceived.In case blower fan breaks down, and transformer self temperature is very high, is badly in need of the situation of forced air cooling, and this moment, the safe operation of transformer will be on the hazard.
4. blower fan is installed in the inside of transformer housing, is not easy to maintenance and replacing.As a kind of rotary-type electric equipment, under the normal condition, be generally about 5 years the useful life of blower fan.Then be 30 years the useful life of common dry-type transformer, even longer.Therefore dry-type transformer ventilating fan more in use more during ventilating fan, must scale off transformer from system, open the transformer door and handle, thereby cause the power failure of whole system.
The utility model content
Technical problem to be solved in the utility model is at above shortcomings in the prior art, a kind of dry-type transformer that blower fan is installed, overhauled and change of being convenient to is provided, the good cooling results of this dry-type transformer targetedly, has improved continuity and the reliability of electric power system power supply.
The technical scheme that solution the utility model technical problem adopts is the cooling unit that this dry-type transformer comprises the transformer housing, is located at the transformer coil in the transformer housing and is used for described transformer coil is dispelled the heat, wherein, described cooling unit comprises blower fan, and described blower fan is located at the outside of transformer housing.
Preferably, described cooling unit also includes guide duct, and wind inlet end and the blower fan of described guide duct join, and the outlet air end of guide duct stretches in the transformer housing and towards described transformer coil.
A kind of preferred version is, the outlet air end of described guide duct be arranged near the transformer coil and its port towards thermal region or the hottest point of transformer coil.
Wherein, the port of the outlet air end of described guide duct is towards the middle part of transformer coil, perhaps, and towards the bottom of transformer coil.
Perhaps, described guide duct adopts two, and the port of the outlet air end of a wind-guiding end is towards the middle part of transformer coil, and the port of the outlet air end of another root guide duct is towards the bottom of transformer coil.
Another kind of preferred version is that described guide duct is arranged on the below of transformer coil.
Preferably, described cooling unit also comprises auxiliary air guide member, and described auxiliary air guide member is arranged on the below of transformer coil, and auxiliary air guide member is provided with air guide hole, and the position of described air guide hole is over against the lower end of transformer coil.The end of auxiliary air guide member and the outlet air end of guide duct join, and the air-flow that blower fan produces is introduced in the described auxiliary air guide member by guide duct, and the air-flow uniform distribution that auxiliary air guide member is sent into guide duct again is in described transformer coil.
Wherein, described auxiliary air guide member adopts insulating material to make.
Preferably, described guide duct adopts insulating material to make.
Preferably, described blower fan adopts axial flow blower or air blast or air compressor.
The utility model dry-type transformer has not only solved in the present dry-type transformer cooling blower at work can't directed cooling, cooling surface disperses, the inconvenience of blower fan operating state is checked, transformer is in operation to the drawbacks such as maintenance inconvenience of blower fan, also make simultaneously transformer air cooling effect more directly and efficient, and the user can overhaul, change blower fan at any time in that transformer is in service.With respect to traditional dry-type transformer, the energy-saving and environmental protection more of the utility model dry-type transformer.
The beneficial effects of the utility model are specific as follows:
1, because blower fan is installed in the outside of transformer housing, when needs overhaul and change blower fan, can be to transformer processings that have a power failure, continuity and stability that the system that guaranteed powers;
2, in the transformer working condition that can intuitively, simply see blower fan in service, avoid because fan trouble cause transformer be in operation heat radiation bad, influence transformer and uses safely;
3, adopt guide duct the air quantity that blower fan produces directly can be guided into and be beneficial to transformer body hottest point, good heat dissipation effect;
4, because guide duct adopts insulating material to make, therefore it can be need not to consider insulation distance near the hottest point position of transformer coil as much as possible, further guaranteed cooling effect;
5, blower fan adopts axial flow blower or air blast or air compressor, and axial flow blower is compared with crossflow fan with at present common transformer with air compressor, and the air quantity of its generation is concentrated, blast is bigger, and radiating efficiency is higher, better effects if.There are following relation: wp=0.5.ro.v2 in blast and wind speed;
Wherein, wp is blast [kN/m
2], ro is atmospheric density [kg/m
3], v is wind speed [m/s], wind speed is directly proportional with the ability that wind is taken away heat again.Therefore, wind speed is more big, and air cooling effect is more good.
Description of drawings
Fig. 1 is the structural front view of existing dry-type transformer;
Fig. 2 is the end view of Fig. 1;
Fig. 3 is the structural representation of dry-type transformer among the utility model embodiment 2;
Fig. 4 is the structural representation of dry-type transformer among the utility model embodiment 4;
Fig. 5 is the cut-away view of auxiliary air guide member among the utility model embodiment 4.
Among the figure: the 1-blower fan; 2-transformer housing; 3-pad pin; The 4-transformer coil; The 5-thermostat; 6-assists air guide member; The 7-transformer core; The 8-guide duct.
Embodiment
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with accompanying drawing the utility model is described in further detail.
Embodiment 1:
Present embodiment provides a kind of dry-type transformer, the cooling unit that comprises the transformer housing, is located at the transformer coil in the transformer housing and is used for described transformer coil is dispelled the heat, wherein, described cooling unit comprises blower fan, and described blower fan is located at the outside of transformer housing.
Embodiment 2:
As shown in Figure 3, the cooling unit that dry-type transformer in the present embodiment comprises transformer housing 2, is located at the transformer coil 4 in the transformer housing 2 and is used for described transformer coil 4 is dispelled the heat, described cooling unit comprises blower fan 1, and described blower fan 1 is located at the outside of transformer housing 2.
In the present embodiment, described cooling unit also includes guide duct 8, and the wind inlet end of guide duct and blower fan 1 join, and its outlet air end stretches in the transformer housing 2 and towards described transformer coil 4.
Preferably, the outlet air end of described guide duct be arranged near the transformer coil and its port towards the hottest point of transformer coil.
In the present embodiment, blower fan 1 can adopt axial flow blower, air blast or air compressor.Blower fan 1 adopts 4 or 6, and these 4 or 6 blower fans distribute in the bilateral symmetry of transformer housing 2.
For each blower fan, the guide duct 8 that joins with it adopts two, the port of the outlet air end of a wind-guiding end is towards the middle part of transformer coil 4, namely towards the hottest point of transformer coil, the outlet air end of another root guide duct stretches into the bottom of transformer housing 4, and its port is towards the bottom of transformer coil 4.
Wherein, guide duct 8 adopts insulating material to make.Preferably, guide duct 8 can adopt thermoplastic material to make, and such as employing thermoplastic PVC material, thereby can need according to the transformer internal heat dissipating, adjusts blowing direction and the position of guide duct 8 at any time.
Embodiment 3:
Dry-type transformer is with the difference of embodiment 2 in the present embodiment: the quantity of guide duct is different.
In the present embodiment, 8 of guide ducts adopt one, and the port of the outlet air end of this wind-guiding end is towards the middle part of transformer coil 4, namely towards the hottest point of transformer coil.
Other structures of dry-type transformer are all identical with embodiment 2 in the present embodiment, repeat no more here.
Embodiment 4:
The difference of dry-type transformer and embodiment 2 is in the present embodiment: also comprise auxiliary air guide member 6 in the described cooling unit.
As shown in Figure 4, in the present embodiment, described auxiliary air guide member 6 is arranged on the below of transformer coil, and is fixed on the lower clamping piece of transformer.
As shown in Figure 5, described auxiliary air guide member 6 is provided with air guide hole, and the position of described air guide hole is over against the lower end of transformer coil.The end of auxiliary air guide member and the outlet air end of guide duct join, and the air-flow that blower fan produces is introduced in the auxiliary air guide member 6 by guide duct, and the air-flow uniform distribution that described auxiliary air guide member 6 is used for guide duct is sent into is in transformer coil.
Other structures of dry-type transformer are all identical with embodiment 2 in the present embodiment, repeat no more here.
Be understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.
Claims (10)
1. dry-type transformer, the cooling unit that comprises the transformer housing, is located at the transformer coil in the transformer housing and is used for described transformer coil is dispelled the heat, it is characterized in that described cooling unit comprises blower fan, described blower fan is located at the outside of transformer housing.
2. dry-type transformer according to claim 1 is characterized in that, described cooling unit also includes guide duct, and wind inlet end and the blower fan of described guide duct join, and the outlet air end of guide duct stretches in the transformer housing and towards described transformer coil.
3. dry-type transformer according to claim 2 is characterized in that, the outlet air end of described guide duct be arranged near the transformer coil and its port towards thermal region or the hottest point of transformer coil.
4. dry-type transformer according to claim 3 is characterized in that, the port of the outlet air end of described guide duct is towards the middle part of transformer coil, perhaps, and towards the bottom of transformer coil.
5. dry-type transformer according to claim 3 is characterized in that, described guide duct adopts two, and the port of the outlet air end of a wind-guiding end is towards the middle part of transformer coil, and the port of the outlet air end of another root guide duct is towards the bottom of transformer coil.
6. dry-type transformer according to claim 2 is characterized in that, described guide duct is arranged on the below of transformer coil.
7. dry-type transformer according to claim 2, it is characterized in that described cooling unit also comprises auxiliary air guide member, described auxiliary air guide member is arranged on the below of transformer coil, auxiliary air guide member is provided with air guide hole, and the position of described air guide hole is over against the lower end of transformer coil.The end of auxiliary air guide member and the outlet air end of guide duct join, and the air-flow that blower fan produces is introduced in the described auxiliary air guide member by guide duct, and the air-flow uniform distribution that auxiliary air guide member is sent into guide duct again is in described transformer coil.
8. dry-type transformer according to claim 7 is characterized in that, described auxiliary air guide member adopts insulating material to make.
9. according to the described dry-type transformer of one of claim 2-8, it is characterized in that described guide duct adopts insulating material to make.
10. according to the described dry-type transformer of one of claim 1-8, it is characterized in that described blower fan adopts axial flow blower or air blast or air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320245096 CN203232777U (en) | 2013-04-28 | 2013-04-28 | Dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320245096 CN203232777U (en) | 2013-04-28 | 2013-04-28 | Dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232777U true CN203232777U (en) | 2013-10-09 |
Family
ID=49288883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320245096 Expired - Fee Related CN203232777U (en) | 2013-04-28 | 2013-04-28 | Dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232777U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319071A (en) * | 2014-11-14 | 2015-01-28 | 镇江船舶电器有限责任公司 | Marine platform self cooling transformer |
| CN106128717A (en) * | 2015-05-04 | 2016-11-16 | Ls产电株式会社 | Cooling units for molded transformers |
| CN111899959A (en) * | 2020-07-19 | 2020-11-06 | 张晓卫 | Air-cooled energy-saving distribution transformer |
| WO2025008492A1 (en) * | 2023-07-04 | 2025-01-09 | Hitachi Energy Ltd | Transformer arrangement having an air duct element, air duct element, and cooling system for cooling a transformer |
-
2013
- 2013-04-28 CN CN 201320245096 patent/CN203232777U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319071A (en) * | 2014-11-14 | 2015-01-28 | 镇江船舶电器有限责任公司 | Marine platform self cooling transformer |
| CN106128717A (en) * | 2015-05-04 | 2016-11-16 | Ls产电株式会社 | Cooling units for molded transformers |
| CN111899959A (en) * | 2020-07-19 | 2020-11-06 | 张晓卫 | Air-cooled energy-saving distribution transformer |
| WO2025008492A1 (en) * | 2023-07-04 | 2025-01-09 | Hitachi Energy Ltd | Transformer arrangement having an air duct element, air duct element, and cooling system for cooling a transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20160428 |