CN2182448Y - Rolling contact for tapping switch of transformer - Google Patents
Rolling contact for tapping switch of transformer Download PDFInfo
- Publication number
- CN2182448Y CN2182448Y CN 93223287 CN93223287U CN2182448Y CN 2182448 Y CN2182448 Y CN 2182448Y CN 93223287 CN93223287 CN 93223287 CN 93223287 U CN93223287 U CN 93223287U CN 2182448 Y CN2182448 Y CN 2182448Y
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- contact
- moving contact
- moving
- transformer
- mandrel
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Abstract
The utility model relates to a rolling contact for the tapping switch of a transformer. The utility model is mainly characterized in that an original sliding moving contact is changed into a rolling moving contact. A moving contact, a push rod, a core shaft and a spring are all arranged in a guide limiting groove. When a switch is tapped and switched, the original sliding moving contact changes into a pure rolling moving contact, which raises the mechanical life of a contact, makes an electrical life and an operation convenient, has easy manufacture and makes a structure simplified. The utility model is suitable for various types of the tapping switches of the transformer.
Description
The utility model belongs to sub-connecting switch of transformer rolling type contact, is the improvement to existing sub-connecting switch of transformer contact.
The simple and easy combined type on load tap changer selector switch that has been widely used at present, the tap selector of cage off circuit tap changer and combined loaded tap-changer, scope switch contact contact form such as Fig. 7, shown in Figure 8.It is by central rotating shaft 1, and upper and lower support 2, moving contact supporter 3, spring 4, moving contact 6, fixed contact 8 etc. are formed the slidingtype structure of contact terminal.Moving contact 6 slides on fixed contact 8 when carrying out the tap conversion, because the wear extent of sliding friction is much bigger, makes the dynamic and static contact of switch have to adopt electric conductivity and good noble metal or the alloy friction pair of anti-wear performance to constitute, to improve switch life.Contact has also required good heat-resistance, arc ablation resistance performance in the diverter switch of on load tap changer, selector switch, and these composite requests often are difficult to be met, and very uneconomical.Metal filings also damages the insulation property of medium simultaneously, thereby reduces service life, maintenance phase and the reliability of transformer.This class contact life-span is generally lower, and safeguards inconvenience.
A kind of wearless clip-type branch switch without excitation is disclosed in Chinese patent CN86101101A, this switch becomes the sliding friction between the active and static contact rolling friction of changeing between casting die and roller, mutual wearing and tearing in the time of can avoiding the tap conversion by the conversion of rolling between dynamic and static contact have solved above-mentioned contact wear problem.But this switch is provided with the sheave gear mechanism, and structure is complicated, and its inner space for shunting switch, county is limited, thereby can not adopt this structure.
The dynamic and static contact of above slidingtype shunting switch universal demand plane coplane, this point often make assembling,
Debugging work is cumbersome, and contact pressure is inhomogeneous, and rotating torque is big even stuck phenomenon, poor reliability occur.
The purpose of this utility model is to avoid above-mentioned weak point and a kind of features simple structure, small and light, reliability height is provided, and machinery, electrical endurance is long, operates nimble sub-connecting switch of transformer rolling type contact.
The purpose of this utility model is realized having central rotating shaft 1 by following scheme, upper and lower support 2, moving contact supporter 3, spring 4, push rod 5, moving contact 6, mandrel 7, fixed contact 8 etc.Its difference is that moving contact 6 is garden column profile, the push rod 5 of garden cylindricality moving contact 6 and corresponding configuration is set on the mandrel 7, the guide and limit groove 10 that plays guiding and position-limiting action that places moving contact supporter 3 to be provided with, push rod 5 afterbodys are top-loaded with spring 4, and corresponding configuration has the fixed contact 8 that distributes along circumferentially, fixed contact is fixed on the fixed contact supporter 9, moving contact 6 is when rotating with moving contact supporter 3, roll along fixed contact 8 surfaces, constitute the rolling type contact, when moving contact was made PURE ROLLING, effect was even more ideal.
In the such scheme, place mandrel 7 on the moving contact supporter 3 can be and maintain static part, suit moving contact 6 on the mandrel, the transition contact that engages with moving contact is a floating structure, built-in spring 4, place the guide and limit groove 10 in the bearing 13 jointly, constitute by transition contact 11 and realize the circumferentially sub-connecting switch of transformer rolling type contact of compensation.Distribute requirement according to contact ampacity size, amount of capacity and task switching, moving contact 6 can be one or more, mandrel 7, push rod 5, fixed contact 8 all can be one or more, thereby constitutes the compound rolling type contact in parallel of multichannel, to satisfy the needs of range transformer shunting switch.
In the such scheme, push rod 5 also can be set in moving contact 6 outer surfaces, and this moment, moving contact was when rolling in fixed contact 8 surface and produce slide relative between push rod.For big capacity contact, fixed contact 8 can be the sheet plane, along circumferentially distributing.The kinetic head group that mandrel 7, push rod 5, moving contact 6 formed will parallel upper and lower layout with the stationary contact women's head-ornaments, forms clamp roll dynamic formula contact, and this contact combines each contact characteristic.In the such scheme, become along straight line or plane distribution when fixed contact 8 is infinitely great along the garden week that distributes in week, quiet supporter is plane.This moment, the rotation of central rotating shaft became parallel moving, and still all constitute the rolling type contact this moment, and combination property is superior.
According to such scheme, primary structure of the present utility model is characterised in that moving contact 6 is the column profile, the push rod 5 of garden cylindricality moving contact 6 and corresponding configuration is set on the mandrel 7, place the guide and limit groove 10 that is provided with on the moving contact supporter 3, push rod 5 afterbodys are equipped with spring 4, make moving contact 6 and remain certain contact pressure along the fixed contact 8 that is fixed on the fixed contact supporter 9 that circumferentially distributes when engaging, when the switch tap is changed, moving contact 6 is made rolling movement, constitutes the rolling type contact.
When carrying out the tap conversion, moving contact 6 revolves round the sun around central rotating shaft 1 with moving contact supporter 3 on the one hand, on the other hand moving, under the frictional force effect between fixed contact, moving contact rolls along the fixed contact surface, and around mandrel 7 rotations, in guide and limit groove 10, doing the radial expansion motion under the effect of spring 4 again simultaneously with mandrel 7, make, when engaging, keep certain contact pressure between the rest energy head, make contact stabilization reliable, the compound motion of the stretching motion of moving contact and moving contact 6 has played compensating action, make, fixed contact, mandrel has kept the contact changeover program constant in certain wear range, and contact performance is good, has overcome the defective that existing switch exists.
When switch needs, also mandrel 7 can be designed to the fixture on the moving contact supporter 3,6 of fixed contact 8 and moving contacts increased transition contact 11, spread contact 14 and the sheet 12 that is flexible coupling, constitute by transition contact 11 and realize the circumferentially rolling type contact of compensation.This structure is complicated, but is easy to assembling, mode and maintenance.
According to the structure needs, the moving contact group can be designed to the compound rolling type contact in parallel of multichannel, make each moving contact ampacity, bear and cut-off capacity and reduce, operate more reliable.On the sets of contacts a plurality of mandrels can be arranged, a plurality of kinetic heads 6 also can be housed on the mandrel.
Primary structure feature of the present utility model also is: for big capacity switch, fixed contact 8 can be designed to the blade-like plane and distribute along week or plane and straight line, mandrel 7, moving contact 6 are along fixed contact 8 upper and lower parallel distributions, composition is to clamp roll dynamic formula contact, it is superior that this contact has combination property, especially the strong characteristics of anti-short circuit capability.
This rolling type can be used on off circuit tap changer contact and on load tap changer tap selector, scope switch and the electric current output contact switch being improved mechanical endurance greatly, and wearing and tearing reduce, operational torque reduces, structure is simplified, and operational reliability strengthens, and integrated cost reduces significantly.When the selector switch that is used on load tap changer, diverter switch, the combination property that improves switch contact there is special-effect.Be embodied in following several aspect:
One, under the high speed of switch load switches, the cambered surface transition of moving contact garden significantly reduces impulsive force, vibrate for a short time, switches steady.
Two, because the rotation of moving contact 6 makes moving contact garden side face mechanical wear even, overcome moving contact useful life that former switch exists and the fixed contact phenomenon that do not match.Because moving contact work is much frequent than fixed contact.
Three, be set on the mandrel 7 owing to moving contact 6, thereby when breaking away from rest energy, moving contact still can keep the high speed rotation, and more than its former switch the motion of radial expansion, these newly-increased compound motions make the very fast cooling of arc velamen of the electric arc that produces when cut-offfing, simultaneously because the existence in gap between mandrel and moving contact product, make electric arc be decomposed into the series connection multi-break, thereby make electric arc be easier to extinguish.Arcing time is short, and the galvanic corrosion degree alleviates, moving contact especially, thus make contact realize the coupling of high life.
Its four: the use of a plurality of moving contacts in parallel makes the task of cut-offfing of each moving contact alleviate, and the contact life-span prolongs, and the contact connecting-disconnecting function strengthens simultaneously, and reliability improves.
Its five: garden cylindricality moving contact makes that contact part Electric Field Distribution is even, has avoided the tip.
The employing of rolling type contact can reduce big capacity switch greatly to contact material and surface-treated high request, and the switch integrated cost reduces greatly.
The utility model structure is very easy, makes easily, is widely used in all types of sub-connecting switch of transformer, not limited by coil pressure regulation position and construction of switch simultaneously.
Fig. 1 is the front view of an embodiment of the present utility model
Fig. 2 is the A-A view corresponding to Fig. 1
Fig. 3 is the front view of moving contact supporter 3 among Fig. 1.
Fig. 4 be to corresponding to the B of Fig. 3 to view
Fig. 5 is the front view of second embodiment of the present utility model
Fig. 6 is the front view of the 3rd embodiment of the present utility model
Fig. 7 is the structural representation of the selector switch of existing on load tap changer
Fig. 8 is the C-C view corresponding to Fig. 7
The title of each sequence number is as follows among Fig. 1-8:
The upper and lower support 3-of 1-central rotating shaft 2-moving contact supporter
4-spring 5-push rod 6-moving contact
7-mandrel 8-fixed contact 9-fixed contact supporter
The soft contact pin of 10-guide and limit groove 11-transition contact 12-
13-bearing 14-is spreaded contact
Narrate three embodiment of the present utility model respectively below in conjunction with accompanying drawing:
First embodiment of the present utility model such as Fig. 1-4, for a kind of selector switch of on load tap changer (only shows a phase, has the central rotating shaft 1 that is threaded onto on the upper and lower support 2 down together), moving contact supporter 3 is housed on the central rotating shaft, it is provided with guide and limit groove 10, as shown in Figure 3, Figure 4.Mandrel 7 is housed in the groove, is set with two moving contacts 6, push rod 5 on the mandrel, push rod 5 afterbodys are top-loaded with spring 4, and fixed contact 8 edges that connect with moving contact circumferentially are arranged on the fixed contact supporter 9 that is fixed on the upper and lower support 2.The effect of spring makes contact remain reliable contact pressure when conversion and on the contact position, and realizes rolling, and dynamic and static contact wearing and tearing are compensated, and the switch changeover program remains unchanged, and contact is good.
Among Fig. 2, the moving contact that engages with fixed contact 8 is a main contact, and another pays contact for transition, and they all cut-off electric arc, pays only moment work when cut-offfing of contact.According to the difference that different switch performances are required, configuration contact number and work contact position are also different.
Figure 5 shows that second embodiment, front view is a mouse cage type structure switch, different with first embodiment is that it has increased bearing 13 on 2 on upper and lower support, it is provided with guide and limit groove 10, be set with transition contact 11 in the groove and spread between contact 14, two contacts with the sheet 12 that is flexible coupling and link to each other, spring 4 is equipped with in the centre, be fixed with mandrel 7 on the moving contact supporter 3, be set with moving contact 6 on it.This switch mounting or dismounting and easy maintenance.When safeguarding with central rotating shaft 1, upper and lower support 2, bearing 13 grades are whole extracts out.
Figure 6 shows that the 3rd embodiment front view.For to clamp roll dynamic formula contact, institute's cored axle 7 is fixed contact 8 upper and lower corresponding parallel dresses for sleeping in the guide and limit groove 10 of different with Fig. 1 is moving contact supporter 3, is characterized in that anti-short circuit capability is strong, is applicable to big electric current, big capacity contact, and it is in parallel to be convenient to many groups.
Claims (5)
1, a kind of rolling type contact that is used for sub-connecting switch of transformer, has central rotating shaft 1, on, lower carriage 2, moving contact supporter 3, spring 4, moving contact 6, mandrel 7, fixed contact 8 etc., it is characterized in that: moving contact 6 is garden column profile, the push rod 5 of garden cylindricality moving contact 6 and corresponding configuration is set on the mandrel 7, place the guide and limit groove 10 that plays guiding and position-limiting action that is provided with on the moving contact supporter 3, push rod 5 afterbodys are top-loaded with spring 4, and corresponding configuration has the fixed contact 8 that distributes along circumferentially, and fixed contact is fixed on the fixed contact supporter 9, and moving contact 6 is when rotating with moving contact supporter 3, roll along fixed contact 8 surfaces, constitute the rolling type contact.
2, by the described sub-connecting switch of transformer rolling type of claim 1 contact, it is characterized in that placing mandrel 7 on the moving contact supporter 3 can be and maintain static part, suit moving contact 6 on the mandrel, the transition contact 11 that engages with moving contact is floating structure, built-in spring 4, place the guide and limit groove 10 in the bearing 13 jointly, constitute by transition contact 11 and realize the circumferentially sub-connecting switch of transformer rolling type contact of compensation.
3, by the described sub-connecting switch of transformer rolling type of claim 1 contact, it is characterized in that: moving contact 6 can be one or more, mandrel 7, push rod 5, and fixed contact 8 all can be one or more, thereby constitutes the compound rolling type contact in parallel of multichannel.
4,, it is characterized in that by the described sub-connecting switch of transformer rolling type of claim 1 contact: but its push rod 5 also suit be supported on the moving contact outer surface.
5, by the described sub-connecting switch of transformer rolling type of claim 1 contact, it is characterized in that: fixed contact 8 is during for the flat knife sheet, and mandrel 7 can be arranged in parallel in that the fixed contact plane is upper and lower, with push away deposit 5, spring 4, moving contact 6 constitute jointly to clamp roll dynamic formula contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223287 CN2182448Y (en) | 1993-08-29 | 1993-08-29 | Rolling contact for tapping switch of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223287 CN2182448Y (en) | 1993-08-29 | 1993-08-29 | Rolling contact for tapping switch of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2182448Y true CN2182448Y (en) | 1994-11-09 |
Family
ID=33801657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93223287 Expired - Fee Related CN2182448Y (en) | 1993-08-29 | 1993-08-29 | Rolling contact for tapping switch of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2182448Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436939A (en) * | 2011-09-30 | 2012-05-02 | 上海华明电力设备集团有限公司 | Rolling type contact assembly |
| CN102693820A (en) * | 2012-06-06 | 2012-09-26 | 武汉泰普变压器开关有限公司 | Off-circuit tap-changer |
| CN108682588A (en) * | 2018-07-05 | 2018-10-19 | 上海良信电器股份有限公司 | A kind of contact system of switch element |
| EP4044206A1 (en) * | 2021-02-16 | 2022-08-17 | Hitachi Energy Switzerland AG | Contact unit and contact system for an on-load tap changer and on-load tap changer |
-
1993
- 1993-08-29 CN CN 93223287 patent/CN2182448Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436939A (en) * | 2011-09-30 | 2012-05-02 | 上海华明电力设备集团有限公司 | Rolling type contact assembly |
| CN102436939B (en) * | 2011-09-30 | 2014-10-15 | 上海华明电力设备集团有限公司 | Rolling type contact assembly |
| CN102693820A (en) * | 2012-06-06 | 2012-09-26 | 武汉泰普变压器开关有限公司 | Off-circuit tap-changer |
| CN108682588A (en) * | 2018-07-05 | 2018-10-19 | 上海良信电器股份有限公司 | A kind of contact system of switch element |
| EP4044206A1 (en) * | 2021-02-16 | 2022-08-17 | Hitachi Energy Switzerland AG | Contact unit and contact system for an on-load tap changer and on-load tap changer |
| WO2022174993A1 (en) | 2021-02-16 | 2022-08-25 | Hitachi Energy Switzerland Ag | Contact unit and contact system for an on-load tap changer and on-load tap changer |
| CN116490946A (en) * | 2021-02-16 | 2023-07-25 | 日立能源瑞士股份公司 | Contact unit and contact system for an on-load tap-changer and on-load tap-changer |
| CN116490946B (en) * | 2021-02-16 | 2024-03-01 | 日立能源有限公司 | Contact unit and contact system for an on-load tap-changer and on-load tap-changer |
| US12020886B2 (en) | 2021-02-16 | 2024-06-25 | Hitachi Energy Ltd | Contact unit and contact system for an on-load tap changer and on-load tap changer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |