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Energy-saving electric transformer with low noice
CN2142996Y
China
Worldwide applications
1992
CN
Application CN 92220642 events
1992-11-06
1993-09-29
Application granted
1993-09-29
2002-11-06
Anticipated expiration
Status
Expired - Fee Related
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Description
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The utility model relates to a kind of transformer, particularly be a kind of low noise energy-saving power transformer.
The power transformer that China adopts at present comprises fuel tank, iron core, low pressure winding coil, high pressure winding coil, shunting switch.The overlap joint of its stem stem and yoke is the alternate joint structure.The magnetic line of force produces eddy current and magnetic saturation when seam crossing laterally passes through in this structure, forms high loss zone, and noise is big, influences environment.
In view of above reason, the purpose of this utility model be for provide a kind of energy-conservation, noise is low, cost is low, easy access, low noise energy-saving power transformer safe and reliable to operation.
The utility model is the improvement on known power transformer, it is characterized in that iron core adopts four-step core structure (referring to Fig. 1, Fig. 3, Fig. 4), can improve the magnetic flux distribution of seam crossing, reduces no-load loss, no-load current and noise.
The performance parameter of two side columns of above-mentioned iron core and the core material of yoke is better than the performance parameter (referring to Fig. 5) of newel core material, further improve the magnetic flux distribution of stem stem and yoke lap-joint, reduce the magnetic line of force and when seam crossing laterally passes through, produce eddy current and magnetic saturation, further reduce no-load loss, no-load current.
Above-mentioned high pressure winding coil end employing U type insulation protection soft corner-ring (referring to Fig. 9---Figure 13), improve the Electric Field Distribution of end winding effectively, improved the electric property index.
Above-mentioned U type insulation protection soft corner-ring adopts crimped paper to make, and can dwindle coil height, saves raw material, low cost of manufacture, and electric property is reliable, good manufacturability.
Above-mentioned shunting switch can adopt off circuit tap changer (referring to Fig. 2).
The off circuit tap changer model can be WSP63/10-3 * 3C, can make oil tank of transformer reduce corresponding height, save transformer oil, and reformed pressure regulation changing-over structure, increased positioning self-lock device, and the positioning indicating function is arranged, eliminated switch room position short circuit hidden danger, can adjust the interior gland that exposes at any time, to change pressure oil sealing, can not change oil sealing easily under the situation of suspended core at transformer, get rid of oil leakage phenomenon effectively.
Above-mentioned core material adopts the high magnetic strength electrical sheet of transformer, has improved the kelvin effect of electrical sheet effectively, has reduced eddy current loss, has reduced no-load current and no-load loss significantly, improves the transformer performance parameter, has reduced production cost.
Compare with known power transformer, the utlity model has following advantage:
1. the no-load performance index is excellent, and energy-saving effect is remarkable, (referring to table 1, table 2) in light weight.
Table 1: the utility model and domestic like product comparison sheet
| Specifications and models | No-load loss (W) | No-load current (%) | Load loss (W) | Electromagnetic wire (kg) | Electrical sheet (kg) | Transformer oil (kg) | Gross weight (kg) |
| The utility model 100KVA | 227 | 0.85 | 1700 | 99 | 181 | 120 | 560 |
| S7－100/10 | 320 | 2.3 | 2000 | 87.5 | 203 | 128 | 625 |
| SL7－100／10 | 320 | 2.3 | 2000 | 58.9 | 223 | 175 | 685 |
| S9－100／10 | 290 | 2.0 | 1500 | 114 | 215 | 140 | 650 |
Table 2 the utility model and home products electricity consumption comparison sheet
| Rated capacity (KVA) | No-load loss (W) | Load loss (W) | Energy-conservation power transformation of the utility model year (KWh) | ||||||||
| S5 | S7 | S9 | The utility model | S5 | S7 | S9 | The utility model | Compare with S5 | Compare with S7 | Compare with S9 | |
| 100 | 540 | 320 | 290 | 227 | 2100 | 2000 | 1500 | 1700 | 3742 | 1565 | 52 |
From on can find out,
More every kilovolt-ampere of annual economize on electricity 37.42kWh of the utility model and S5 type product is with more every kilovolt-ampere of annual economize on electricity 15.65KWh of S7 type product, with more every kilovolt-ampere of annual economize on electricity 0.52kwh of S9 type product.
2. noise is low, and temperature rise is low, has improved the environmental condition of operation effectively.
Table 3: noise objective comparison sheet
| Transformer capacity (KWA) | DF0861-85 required standard (dB) | Country's professional standard (dB) | The utility model (dB) |
| 100 | 50 | 48 | 35.54 |
As can be known from Table 3, the utility model reduces by 25.96% than the sound level index of the same capacity transformer of national regulation.
3. improve the transformer performance parameter, reduce production costs.
4. fuel-economizing, safe and reliable to operation, maintenance is convenient.
5. applicability is wide, can be widely used in industries such as electric power, machinery, chemical industry, oil, metallurgy, military project, traffic, post and telecommunications, railway, capital construction, mine scientific research.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
Fig. 1: the utility model structural representation
Fig. 2: the utility model structure vertical view
Fig. 3: core structure schematic diagram
The A-A cutaway view of Fig. 4: Fig. 3
Fig. 5: iron core laminate patch figure (a)
Fig. 6: iron core laminate patch figure (b)
Fig. 7: iron core laminate patch figure (c)
Fig. 8: iron core laminate patch figure (d)
Fig. 9: soft corner-ring installation site figure
Figure 10: the soft corner-ring and the high-voltage coil and low-voltage coil location drawing
The vertical view of Figure 11: Figure 10
Figure 12: soft corner-ring structural representation
The B-B cutaway view of Figure 13: Figure 12
From Fig. 1--can find out Fig. 2 that fuel tank 1, iron core 2, high pressure winding coil 3, low pressure winding coil 4, shunting switch 5 are arranged in the utility model.
The shape of iron core 2 is the four-step core structure as shown in Figure 3, Figure 4.Fine line among Fig. 4 is a magnetic line of force, and the actual situation line is the half bar magnetic line of force.Iron core is pressed Fig. 5-Fig. 8 (a) and (b), (c), (d) order laminate patch successively.Newel iron core 6 shown in Figure 3 is selected the DQ147-30 cold-rolled orientation silicon steel for use, and side column 7,8, yoke 9,10 are selected the DQ133-30 cold-rolled orientation silicon steel for use.
As Fig. 9---shown in Figure 13, adopted U type insulation protection soft corner-ring 11 in the end of high pressure winding coil 3.Protection soft corner-ring 11 be adopt 50 crimped papers at corrugation 12 two ends of 4 of high pressure winding coil 3 and low pressure winding coils respectively around thick 1 millimeter, coiling completion back forms soft corner-ring with crimped paper toward turning up with hand.In the middle of soft corner-ring 11, level up with thick 0.08 millimeter cable paper 13.
Tank envelope body of the present utility model adopts electrostatic plastics-spraying technology, has the characteristics of anticorrosion, acid and alkali-resistance, high-low temperature resistant, greatly improves its presentation quality, is popular in users.
Claims (5)
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Claims (5)
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1, low noise energy-saving power transformer has fuel tank, iron core, low pressure winding coil, high pressure winding coil, shunting switch, it is characterized in that described iron core is the four-step core structure.
2, low noise energy-saving power transformer as claimed in claim 1 is characterized in that described high pressure winding coil end employing U type insulation protection soft corner-ring.
3, low noise energy-saving power transformer as claimed in claim 2 is characterized in that described U type insulation protection soft corner-ring adopts crimped paper to make.
4, low noise energy-saving power transformer as claimed in claim 1 is characterized in that described shunting switch can adopt off circuit tap changer.
5, low noise energy-saving power transformer as claimed in claim 1 is characterized in that described iron core adopts the high magnetic strength electrical sheet of transformer.