CN207834079U - Oil immersed type silicon steel sheet transformer - Google Patents
Oil immersed type silicon steel sheet transformer Download PDFInfo
- Publication number
- CN207834079U CN207834079U CN201820121440.6U CN201820121440U CN207834079U CN 207834079 U CN207834079 U CN 207834079U CN 201820121440 U CN201820121440 U CN 201820121440U CN 207834079 U CN207834079 U CN 207834079U
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- China
- Prior art keywords
- fuel tank
- silicon steel
- steel sheet
- iron core
- type silicon
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Abstract
The utility model discloses oil immersed type silicon steel sheet transformer, including fuel tank, one group of iron core in fuel tank internal and several insulating sleeves for being arranged at the top of fuel tank case lid are set, the fuel tank case lid is connect by bolt with fuel tank, and fuel tank case lid is equipped with pressure relief valve；The iron core is fixed on a pair of parallel be arranged between the fixed strip of fuel tank internal；The fuel tank sidewall bottom is equipped with Fuel Bleed Valve, and tank bottoms are equipped with bleeder plug.The utility model improves the overall operation ability of transformer by the way that multiple iron cores are arranged, while the noise of transformer is reduced using directly welding etc. of good iron core, heat sink strip and fuel tank.
Description
Technical field
The utility model belongs to field of electrical equipment, and in particular to a kind of oil immersed type silicon steel sheet transformer.
Background technology
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary
Grade coil and iron core.The major function of transformer has：Voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing etc..Transformer
Installation insulation cooling is classified as oil-immersed transformer and dry-type transformer.Oil-immersed transformer is to reinforce insulation and cooling item
Part enters the iron core of transformer and winding in the fuel tank for filling insulating oil together.Oil-immersed transformer is industrial and mining enterprises and the people
It is the most commonly used one of transformer type with one of the important equipment in power supply system.
The noise of oil-immersed transformer is mainly the magnetic induction generated by iron core and winding, Magnetic Field-Induced core lamination stack along vertical
Caused by vibration, noise is the main component of transformer noise.Magnetic flux density in the amplitude and core lamination stack of the vibration
And the magnetic property of iron core material is related, and it is little with load current relationship.Iron core generates the reason of noise mainly in alternation magnetic
Under field action, small variation can occur for the size of silicon steel sheet.Since magnetostrictive period of change is half of supply frequency
Period, the vibration of transformer body caused by magnetostriction are using twice of supply frequency as fundamental frequency, so silicon steel sheet
Caused by Magnetostrictive Properties of the vibration mainly by ferromagnetic material.Magnetostrictivity size is related with the material of silicon steel sheet.Magnetic
Cause expansion and contraction bigger, then noise is bigger.In the case of magnetic field intensity is identical, the good silicon steel sheet magnetostriction of material is also small,
Therefore noise is also small.
Magnetostrictivity is also related with magnetic field intensity, and magnetic field is stronger, and ε is bigger.Magnetostrictivity is also with silicon steel sheet surface
It no japanning and anneals related, because coating has adhesive force to silicon steel sheet, can prevent silicon steel sheet from deforming.It is moved back under same magnetic field intensity
The silicon steel sheet of fire is more much smaller than unannealed silicon steel sheet magnetostriction, this is because best annealing process is selected, it can be at double
Reduce magnetostriction.DC magnetic bias phenomena can also generate transformer certain influence, flow through the DC current of winding and become change
A part for depressor exciting current, the DC current make transformer iron core magnetic bias, change the operating point of transformer, make original magnetic
The part for changing curve workspace moves to iron core magnetic saturation region, and as a result total exciting current becomes peaked wave, eventually leads to transformer
Vibration increases.Become larger so as to cause noise, and influences performance.In China, DC power transmission line and transmission line of alternation current and
There are the loads of voltage-current relationship curve asymmetric in row operation or AC network.DC transmission system usually uses monopole to transport
Line mode saves a conducting wire and cost-effective because this good conductor of the earth can be utilized.Due to Underground Long-term have it is big straight
Galvanic electricity stream flows through, thus will produce earth's surface electric current in certain area around its current conversion station, the ac transmission of operation in parallel
If the transformer in system substation is not far apart from current conversion station, it will be interfered, the directly performance of this interference effect is just
It is that DC component is generated in the exciting current of AC transformer by the grounded neutral of AC transformer.Its value size with it is straight
Payload positive correlation when unipolar electricity transmission line operation is flowed, the duration is also same with the DC power transmission line monopolar operation time
Step.DC powered vehicle is mostly used greatly in metropolitan subway, rail traffic and some mine mini trains, these rail traffics
DC power supply use the earth be used as a pole therein, similar to direct current transportation monopolar operation, direct current is caused to the transformer in city
Magnetic bias.Its value is generally smaller, and fluctuation is frequent；Duration is synchronous with subway run time.It can be seen that the noise of transformer
It has a certain impact to its normal use tool.
Invention content
Goal of the invention：The purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of oil immersed type silicon steel sheet
Transformer.
Invention content：In order to reach foregoing invention purpose, what the utility model was specifically performed by：Oil immersed type silicon steel
One group of iron core in fuel tank internal and several insulating sleeves for being arranged at the top of fuel tank case lid are arranged in piece transformer, including fuel tank,
The fuel tank case lid is connect by bolt with fuel tank, and fuel tank case lid is equipped with pressure relief valve；The iron core is fixed on a pair of flat
Row is arranged between the fixed strip of fuel tank internal；The fuel tank sidewall bottom is equipped with Fuel Bleed Valve, and tank bottoms are equipped with bleeder plug.
Wherein, at the top of the iron core and bottom has protrusion, is caught between fixed strip by its protrusion.
Wherein, the iron core material is high magnetic conduction crystal grain directional cold-rolling silicon steel disc.
Wherein, Dual-purpose valve is equipped between the fuel tank sidewall and Fuel Bleed Valve.
Wherein, it is connected with oil conservater at the top of the fuel tank case lid.
Wherein, the side wall of the fuel tank is externally provided with heat sink strip group, and heat sink strip group is directly welded in fuel tank.
Advantageous effect：The utility model improves the entirety of transformer compared with traditional technology by the way that multiple iron cores are arranged
Service ability, while the noise of directly welding etc. reduction transformer using good iron core, heat sink strip and fuel tank.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
Embodiment 1：
As shown in Figure 1, the utility model discloses oil immersed type silicon steel sheet transformer, including fuel tank 1, it is arranged in fuel tank internal
One group of iron core 2 and several insulating sleeves 4 being arranged at the top of fuel tank case lid 3, the fuel tank case lid 3 passes through bolt and fuel tank 1 connects
It connects, fuel tank case lid 3 is equipped with pressure relief valve 5；The iron core 2 is fixed on a pair of parallel fixed strip 6 being arranged in fuel tank internal
Between, the iron core material is high magnetic conduction crystal grain directional cold-rolling silicon steel disc；The fuel tank sidewall bottom is equipped with Fuel Bleed Valve 7, oil
Bottom portion is equipped with bleeder plug 8, and oil conservater 10 is connected at the top of the fuel tank case lid.
Embodiment 2：
Reference implementation example 1, iron core and a kind of preferred fixed form of fixed strip：At the top of iron core and bottom has protrusion, according to
It is caught between fixed strip by its protrusion.
Embodiment 3：
Reference implementation example 1 is equipped with Dual-purpose valve 9 between the fuel tank sidewall and Fuel Bleed Valve, when fuel tank being facilitated to safeguard
Back flushing air.
Embodiment 4：
The side wall of reference implementation example 1, the fuel tank is externally provided with heat sink strip group 11, and heat sink strip group is directly welded in fuel tank, drop
Relative Vibration between low heat emission item group and fuel tank.
Claims (6)
1. oil immersed type silicon steel sheet transformer, including fuel tank（1）, one group of iron core in fuel tank internal is set（2）With setting in fuel tank
Case lid（3）Several insulating sleeves at top（4）, which is characterized in that the fuel tank case lid（3）Pass through bolt and fuel tank（1）Connection,
Fuel tank case lid（3）It is equipped with pressure relief valve（5）；The iron core（2）It is fixed on a pair of parallel fixation being arranged in fuel tank internal
Item（6）Between；The fuel tank sidewall bottom is equipped with Fuel Bleed Valve（7）, tank bottoms are equipped with bleeder plug（8）.
2. oil immersed type silicon steel sheet transformer according to claim 1, which is characterized in that at the top of the iron core and bottom has
Protrusion is caught in by its protrusion between fixed strip.
3. oil immersed type silicon steel sheet transformer according to claim 1, which is characterized in that the iron core material is that high magnetic conduction is brilliant
Grain directional cold-rolling silicon steel disc.
4. oil immersed type silicon steel sheet transformer according to claim 1, which is characterized in that the fuel tank sidewall and Fuel Bleed Valve
Between be equipped with Dual-purpose valve（9）.
5. oil immersed type silicon steel sheet transformer according to claim 1, which is characterized in that be connected at the top of the fuel tank case lid
Oil conservater（10）.
6. oil immersed type silicon steel sheet transformer according to claim 1, which is characterized in that the side wall of the fuel tank is externally provided with scattered
Hot item group（11）, heat sink strip group is directly welded in fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121440.6U CN207834079U (en) | 2018-01-25 | 2018-01-25 | Oil immersed type silicon steel sheet transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121440.6U CN207834079U (en) | 2018-01-25 | 2018-01-25 | Oil immersed type silicon steel sheet transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207834079U true CN207834079U (en) | 2018-09-07 |
Family
ID=63394426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820121440.6U Active CN207834079U (en) | 2018-01-25 | 2018-01-25 | Oil immersed type silicon steel sheet transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207834079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492966A (en) * | 2018-01-25 | 2018-09-04 | 江苏国能合金科技有限公司 | Oil immersed type silicon steel sheet transformer |
-
2018
- 2018-01-25 CN CN201820121440.6U patent/CN207834079U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492966A (en) * | 2018-01-25 | 2018-09-04 | 江苏国能合金科技有限公司 | Oil immersed type silicon steel sheet transformer |
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