CN207718979U - A kind of stainless steel stepwise adjustable resistance and modulated brake resistance - Google Patents
A kind of stainless steel stepwise adjustable resistance and modulated brake resistance Download PDFInfo
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- CN207718979U CN207718979U CN201721529876.0U CN201721529876U CN207718979U CN 207718979 U CN207718979 U CN 207718979U CN 201721529876 U CN201721529876 U CN 201721529876U CN 207718979 U CN207718979 U CN 207718979U
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Abstract
The utility model belongs to technical field of electricity, specially a kind of stainless steel stepwise adjustable resistance and modulated brake resistance, the resistor main body being linked to be is welded by short circuit stainless steel band including several sub-resistances head and the tail, and it is located at the U-shaped insulating part between sub-resistance, the head end of the sub-resistance of side and the tail end of other side sub-resistance are respectively formed input terminal and output end, short circuit copper bar is set in resistor main body, U-shaped insulating part is set between the stainless steel band of sub-resistance, by the different overlapping mode of copper bar short circuit, it can be achieved with resistance and export different resistance values；The stepwise adjustable resistance is put in water, its resistance determines the resistance value of braking resistor with water jointly, stepwise adjustable resistance comes into full contact with water, it is increased with the temperature of dampening, it absorbs largely because of the heat of electric energy conversion, so that it is guaranteed that safety of the stepwise adjustable resistance when current density is very big, realizes the quick reduction of speed of high-power large-size machine, the braking resistor power of formation is big, electric current is big, high pressure resistant, absorption energy is high.
Description
Technical field
The utility model belongs to technical field of electricity, and in particular to one kind is external for motor in large-size machine down speeding procedure
Stepwise adjustable resistance and the braking resistor that is made from it.
Background technology
Braking resistor at present mainly should be in railway locomotive dynamic brake and in Frequency Converter Control decelerating through motor and braking
In circuit.Braking resistor application basic principle be all：Output voltage is generated after the motor excitation rotated, motor passes through outer
It connects braking resistor or current transformer and combines forming circuit with braking resistor, generate electric current, the machinery of motor during motor reduction
It can be converted into electric energy, and consumed in braking resistor in the form of thermal energy.
Braking resistor typically belongs to large power winding formula resistance by material classification, and concrete application mostly uses ripple electricity at present
Resistance, it usually secures two leading-out terminals on cylindrical porcelain tube, bandlet wave-like is wound in ceramic pipe surface
Alloy resistance wire, and its surface coat one layer have it is fire-retardant, the coating of high-temperature stability, ceramic tube is as resistance wire skeleton
Meanwhile and having effects that radiator.
With the fast development of more and more high-power large-size machines and its control frequency converter, in order to ensure power supply unit
Safety needs to realize that motor reduction is adjusted by braking resistor, it is enterprising that the internal energy of power supply unit is transferred to outer connecting resistance
Row consumption, to ensure power supply unit safety, in order to achieve the purpose that fast quick-release can, need outer connecting resistance have superpower (>=
100MVA), the features such as high current (>=5000A), high pressure resistant and absorption high-energy.However, having simultaneously currently on the market especially big
Power, high current, braking resistor product or blank high pressure resistant and that absorb high-energy feature.
Invention content
The purpose of this utility model is to provide a kind of stainless steel stepwise adjustable resistance and modulated brake resistance, can realize big
The quick reduction of speed of power large-size machine, current density is big and is unlikely to deform.
The technical solution of the utility model is as follows：
A kind of stainless steel stepwise adjustable resistance, including be linked to be by the welding of short circuit stainless steel band by several sections of sub-resistance head and the tail
Resistor main body, and the U-shaped insulating part between the sub-resistance of resistor main body, the head end of the sub-resistance of side and another
The tail end of side sub-resistance is respectively formed resistance input terminal and resistance output end, further includes the short circuit copper bar being set in resistor main body,
The section of the U-shaped insulating part be U-shaped, be fixed between the stainless steel band of sub-resistance, U-shaped insulating part length direction with
Plane where sub-resistance is vertical.
Otic placode is welded on the sub-resistance, is equipped with mounting hole in otic placode, installation bolt is to fixed U-shaped in the mounting hole
Insulating part.
The sub-resistance uses rectangular section for 50*10mm stainless steel bands, and through bending is subcooled, welding processing forms.
The U-shaped insulator material, which is vinyl modified epoxy, enhances mould material.
The upper end bending radian of each sub-resistance is selected as R25mm~R50mm, and the spacing between sub-resistance is 40mm
The width of~500mm, stainless steel band are 40mm~500mm.
The U-shaped insulating part point two layers of installation in resistor main body, i.e. the U-shaped insulating part on upper layer are located at same level height
Degree, the U-shaped insulating part of lower layer is located at same level height, and the U-shaped insulating part of the upper and lower is interlaced.
The mounting means of the short circuit copper bar is that will connect and/or incite somebody to action in the two ends of the sub-resistance where input terminal
The end of the output end sub-resistance adjacent with sub-resistance where output end connects.
A kind of stainless steel is segmented braking resistor, it includes insulation box and the stepwise adjustable resistance in insulation box,
Place the water of certain altitude in insulation box, water can not have a segmentation adjustable resistance, the water surface to stepwise adjustable Top Resistance for 150~
200mm, overflow pipe is equipped with before the insulation box, and bottom is equipped with discharging valve.
Further include cabinet, dismountable front beam be equipped on front side of the cabinet, be fixedly mounted in cabinet insulator with not
Become rusty steel vertical beam, and the insulation box of the braking resistor is connect with above-mentioned insulator with stainless steel vertical beam, the short circuit copper bar
It is fixed on stainless steel vertical beam by insulator, cabinet top installs power input, and cabinet front panel is switched equipped with moisturizing, cabinet
Side upper end is equipped with fan shroud and discharge duct, and bottom of cabinet bulk is equipped with return pipe.
The insulation box bottom is laid with ceramic tile, and stepwise adjustable resistance is put in above ceramic tile.
The beneficial effects of the utility model are as follows：
Sub-resistance material takes stainless steel 0Cr18Ni19 (national standard), and it is indeformable and enough to disclosure satisfy that high current passes through
Heat dissipation area, stainless steel section are chosen to be rectangle, when rated current be 10000A, be designed and sized to 50X10mm, that is, ensure that
In the indeformable and enough heat dissipation area of high current or so；
Stepwise adjustable resistance is mainly logical only there are one input terminal, an end output end, but the exportable multigroup resistance value of resistance
The different tap of copper bar short circuit is crossed, resistance is can be achieved with and exports different resistance values；
Stainless steel band uses 0Cr18Ni19, and uses cold bending technique, i.e., is added using big radian Bending Mould and slower
Work speed carries out bending, avoids causing to be cracked on bending radian.So stainless steel metallographic structure not will produce larger variation,
Resistance variations are very small, and only 0.5%~1% or so.
Otic placode is welded in resistor main body side, is drilled on otic placode, hole is mainly used for wearing bolt, and the bolt is for fixed exhausted
Edge accessory and resistor main body, the hole are not worked on resistor main body stainless steel band, do not interfere with resistance sections electric current and resistance
Value.
In use, since the stepwise adjustable resistance is put in water, resistance determines the resistance value of braking resistor with water jointly, point
Section adjustable resistance comes into full contact with water, and since its resistance conductive rate is significantly larger than the conductivity than water, the electric current of braking resistor is exhausted
Major part is increased by stepwise adjustable resistance, and since the specific heat of water is very big with the temperature of dampening, is absorbed largely because electric energy is converted
Heat, so that it is guaranteed that safety of the stepwise adjustable resistance when current density is very big, heat absorption low using the conductivity of water is than high
With the features such as conductivity of alloy is high, current density is big and is unlikely to deform, the quick reduction of speed of high-power large-size machine, the system are realized
Dynamic resistance has the characteristics that especially big high-power, high current, high pressure resistant and absorption high-energy.
Description of the drawings
Fig. 1 is stepwise adjustable braking resistor schematic diagram；
Fig. 2 is stepwise adjustable braking resistor front view；
Fig. 3 is stepwise adjustable braking resistor side view；
Fig. 4 a are schematic diagram when realizing 2a output valves using short circuit copper bar；
The path schematic diagram of electric current flowing when Fig. 4 b are resistance output 2a；
Fig. 5 a are schematic diagram when realizing 3a output valves using short circuit copper bar；
The path schematic diagram of electric current flowing when Fig. 5 b are resistance output 3a；
Fig. 6 a are schematic diagram when realizing 4a output valves using short circuit copper bar；
The path schematic diagram of electric current flowing when Fig. 6 b are resistance output 4a；
Fig. 7 a are schematic diagram when realizing 5a output valves using short circuit copper bar；
The path schematic diagram of electric current flowing when Fig. 7 b are resistance output 5a；
Fig. 8 is that stepwise adjustable resistance constitutes braking resistor schematic diagram；
Fig. 9 is that a kind of stainless steel is segmented braking resistor schematic diagram；
In figure；1. resistance input terminal；2. resistance output end；3. resistance mounting rail；4. resistor main body；5.U shape insulating parts；6.
Short circuit stainless steel band；7. short circuit copper bar；8. otic placode；9. sub-resistance；10. overflow pipe；11. discharging valve；12. insulation box；13.
Stepwise adjustable resistance；14. front beam；15. insulator and stainless steel vertical beam；16. moisturizing switchs；17. fan shroud and discharge duct；
18. return pipe；19. cabinet.
Specific implementation mode
Below by the drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the stepwise adjustable resistance in the utility model includes stainless by short circuit by 5 sections of 9 head and the tail of sub-resistance
Steel band 6 welds the resistor main body 4 being linked to be, and the U-shaped insulating part 5 between 4 sub-resistance 9 of resistor main body, for the ease of
It is equipped with resistance mounting rail 3 mounted on resistor main body 4.The head end of the sub-resistance of side and the tail end of other side sub-resistance distinguish shape
At resistance input terminal 1 and resistance output end 2.
As shown in Fig. 2, the section of U-shaped insulating part 5 is U-shaped, it is mounted between the stainless steel band of sub-resistance, it is solid by bolt
Fixed, 5 length direction of U-shaped insulating part hangs down with plane where sub-resistance.The effect of U-shaped insulating part 5 is fixed each sub-resistance 9, will
Grading resistance forms a whole.
When assembly, upper layer and lower layer installation can be divided into, i.e., the U-shaped insulating part 5 on upper layer is located at same level height, the U of lower layer
Shape insulating part 5 is located at same level height, and the U-shaped insulating part 5 of the upper and lower is interlaced, as shown in Figure 1.
Vinyl modified epoxy, which may be selected, in 5 material of U-shaped insulating part enhances mould material, can high pressure resistant (>=30KV), high temperature resistant (>=
180 DEG C), the weather-proof time is long, can bear higher combined stress.
As shown in figure 3, can preferably weld otic placode 8 on sub-resistance 9, punched on otic placode 8, when installation passes through otic placode 8
On mounting hole installation bolt to fixed U-shaped insulating part 5.U-shaped insulating part 5 is installed as a result of otic placode 8, is not existed directly
It is punched in resistor main body 4, therefore does not interfere with resistance sections electric current and resistance value.
As shown in Figures 2 and 3, the sub-resistance 9 in resistor main body 4 uses rectangular section for 50X10mm stainless steel bands, passes through
Cold bending, welding processing form, integral being welded the head and the tail of 5 sections of sub-resistances 9 by short circuit stainless steel band 6, become resistance
Ontology 4.Every section of 9 resistance value of sub-resistance is identical, and deviation must not exceed 3%, can be upper grading resistance by deviation when selection
Grading resistance collocation under being with deviation is mixed, can ensure well total resistance value deviation that 5 sections of resistance add up 3% it
It is interior.
The upper end bending radian of each sub-resistance is selected as R25mm~R50mm, and the spacing of sub-resistance is 40~500mm, no
The width of rust steel band is preferably 50mm~300mm.
Preferably, stainless steel band material is 0Cr18Ni19.Before processing, cold bending is carried out, stainless steel band is prevented
Cracking is generated in bending part, using big radian bending (R30mm~200mm).This is because hot bending adds using acetylene
The mode of heat, is heated, which is more than 500 DEG C or more, could carry out Bending Processing, can cause not in bending position
Rust steel metallographic structure changes.It is tested by loop resistance instrument, hot bending can cause resistivity to become smaller, and resistance can reduce 3%
~5%.Based on the above reason, the mode of cold bending is selected.
Cold bending is to carry out bending using big radian Bending Mould and slower process velocity, avoids making on bending radian
At cracking.So stainless steel metallographic structure not will produce larger variation, resistance variations are very small, and only 0.5%~1% is left
It is right.
The resistance collocation short circuit copper bar of the application can be realized as the output of a variety of resistance values.Set each grading resistance
Resistance value is a, it is desirable that totally 4 gears, concrete scheme are as follows by output 2a, 3a, 4a, 5a.
As shown in fig. 4 a, 2a output valves are realized using short circuit copper bar.
The head and the tail of sub-resistance 9 where input terminal 1 are got up using the overlap joint of short circuit copper bar 7, and by output end 2 and are exported
The end for the sub-resistance 9 for holding 2 place sub-resistances adjacent is overlapped using short circuit copper bar 7, it will be able to realize 2a output valves, electricity
The path of flowing is as shown in Figure 4 b.
As shown in Figure 5 a, 3a output valves are realized.
Only the end of the sub-resistance 9 adjacent with 2 place sub-resistance of output end of output end 2 is overlapped using short circuit copper bar 7
Come, the path of electric current flowing is as shown in Figure 5 b.
As shown in Figure 6 a, 4a output valves are realized.
Only the head and the tail of the sub-resistance 9 where input terminal 1 are got up using the overlap joint of short circuit copper bar 7, the path of electric current flowing
As shown in Figure 6 b.
As shown in Figure 7a, 5a output valves are realized, it is only necessary to take down all short circuit copper bars, path such as Fig. 7 b of electric current flowing
It is shown.
Braking resistor can also be constituted by above-mentioned stepwise adjustable resistance, as shown in figure 8, braking resistor includes insulation box
12, water and above-mentioned stepwise adjustable resistance 13,12 bottom of insulation box are laid with ceramic tile, and adjustable resistance 13 is put in above ceramic tile.Ceramic tile
Main function is heat-insulated and support.Stepwise adjustable resistance body submerges, and ensure the water surface to Top Resistance be 150~
200mm can guarantee that section tune resistance comes into full contact with water, in time by heat from resistance conducts to water in.12 front weldering of insulation box
Overflow pipe 10 is connect, mainly prevents excessive plus water, more than after specified value, water can guide the water surface from overflow pipe, overflow without water occurs
At the top of water tank, miscellaneous equipment is not interfered with more.Discharging valve 11 is welded in 12 bottom of insulation box, can replace in water tank in time
Water.
Braking resistor can be put into cabinet 19, as shown in figure 9, cabinet Inner Front End is installed by front beam 14, front beam of dismantling,
Water tank can be released outside cabinet and be repaired.Be fixedly mounted insulator and stainless steel vertical beam 15 in cabinet, braking resistor it is exhausted
Edge babinet 13 is connect with above-mentioned insulator with stainless steel vertical beam 15 so that braking resistor is fixed in cabinet, ensures resistance logical
When super-high-current, sliding, displacement shake are not generated.Short circuit copper bar 7 is fixed in by insulator in cabinet inboard beams, and cabinet top installs power supply
Input terminal；Output end is put in cabinet front, and resistance output end is shorted together by copper bar.Before moisturizing switch 16 is put in cabinet
Portion, after opening front door, so that it may which manual operation carries out moisturizing, is operated convenient for personnel.Three-phase wind turbine (not illustrating in figure) is mounted in cabinet
Vapor in cabinet is in time extracted out by fan shroud and discharge duct 17 in rear portion, prevents device in vapor damage cabinet, accelerates
Water cooling speed in water tank.Return pipe 18 is mounted on bottom of cabinet bulk side, in time by the water or height of the cleaning equipment in water tank
Warm water is drained.
Claims (10)
1. a kind of stainless steel stepwise adjustable resistance, including several sections of sub-resistances (9) are welded by short circuit stainless steel band (6) connect from beginning to end
At resistor main body (4), and mounted on resistor main body (4) sub-resistance (9) between U-shaped insulating part (5), side point electricity
The head end of resistance and the tail end of other side sub-resistance are respectively formed resistance input terminal (1) and resistance output end (2), further include being set to electricity
Hinder the short circuit copper bar (7) on ontology (4), it is characterised in that：The section of the U-shaped insulating part (5) is U-shaped, is fixed at
Between the stainless steel band of sub-resistance, U-shaped insulating part (5) length direction is vertical with plane where sub-resistance.
2. a kind of stainless steel stepwise adjustable resistance as described in claim 1, it is characterised in that：It is welded on the sub-resistance (9)
Ear connecting plate (8) is equipped with mounting hole in otic placode (8), and installation bolt is to fixed U-shaped insulating part (5) in the mounting hole.
3. a kind of stainless steel stepwise adjustable resistance as described in claim 1, it is characterised in that：The sub-resistance (9) uses
Rectangular section is 50*10mm stainless steel bands, and through bending is subcooled, welding processing forms.
4. a kind of stainless steel stepwise adjustable resistance as described in claim 1, it is characterised in that：Described U-shaped insulating part (5) material
Material, which is vinyl modified epoxy, enhances mould material.
5. a kind of stainless steel stepwise adjustable resistance as described in claim 1, it is characterised in that：Each sub-resistance it is upper
End bending radian is selected as R25mm~R50mm, and the spacing between sub-resistance is 40mm~500mm, and the width of stainless steel band is 40mm
~500mm.
6. a kind of stainless steel stepwise adjustable resistance as claimed in any one of claims 1 to 5, wherein, it is characterised in that：The U-shaped
Insulating part (5) point two layers of installation, i.e. U-shaped insulating part (5) on upper layer in resistor main body (4) are located at same level height, lower layer
U-shaped insulating part (5) be located at same level height, and the U-shaped insulating part (5) of the upper and lower is interlaced.
7. a kind of stainless steel stepwise adjustable resistance as claimed in any one of claims 1 to 5, wherein, it is characterised in that：Described is short
The mounting means for connecing copper bar (7) is, will be connected in the two ends of the sub-resistance (9) where input terminal (1) and/or by output end
(2) end of the sub-resistance (9) adjacent with sub-resistance where output end (2) connects.
8. a kind of stainless steel is segmented braking resistor, it is characterised in that：It include insulation box (12) and be set to insulation box (12)
The interior stepwise adjustable resistance as described in claim 1~7, the interior water for placing certain altitude of insulation box, water can not have segmentation
Adjustable resistance, the water surface to stepwise adjustable resistance (13) top are 150~200mm, and overflow pipe is equipped with before the insulation box
(10), bottom is equipped with discharging valve (11).
9. a kind of stainless steel as claimed in claim 8 is segmented braking resistor, it is characterised in that：Further include cabinet (19), it is described
Cabinet (19) on front side of be equipped with dismountable front beam (14), insulator and stainless steel vertical beam are fixedly mounted in cabinet (19)
(15), the insulation box (12) of the braking resistor is connect with above-mentioned insulator with stainless steel vertical beam (15), the short circuit
Copper bar (7) is fixed in by insulator on stainless steel vertical beam (15), and cabinet top installs power input, and cabinet front panel, which is equipped with, to be mended
Taps 16, cabinet side upper end are equipped with fan shroud and discharge duct (17), and bottom of cabinet bulk is equipped with return pipe (18).
10. a kind of stainless steel is segmented braking resistor as claimed in claim 8 or 9, it is characterised in that：The insulation box
(12) bottom is laid with ceramic tile, and stepwise adjustable resistance (13) is put in above ceramic tile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721529876.0U CN207718979U (en) | 2017-11-16 | 2017-11-16 | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721529876.0U CN207718979U (en) | 2017-11-16 | 2017-11-16 | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance |
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| Publication Number | Publication Date |
|---|---|
| CN207718979U true CN207718979U (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721529876.0U Active CN207718979U (en) | 2017-11-16 | 2017-11-16 | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801766A (en) * | 2017-11-16 | 2019-05-24 | 核工业西南物理研究院 | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance |
-
2017
- 2017-11-16 CN CN201721529876.0U patent/CN207718979U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801766A (en) * | 2017-11-16 | 2019-05-24 | 核工业西南物理研究院 | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance |
| CN109801766B (en) * | 2017-11-16 | 2024-04-09 | 核工业西南物理研究院 | Stainless steel sectional adjustable resistor and adjustable resistor |
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