EP1369886B1 - Commande mécanique à ressort pour disjoncteur haute ou moyenne tension, comprenant une roue dentée coopérant avec un pignon - Google Patents

Commande mécanique à ressort pour disjoncteur haute ou moyenne tension, comprenant une roue dentée coopérant avec un pignon Download PDF

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Publication number
EP1369886B1
EP1369886B1 EP03291308A EP03291308A EP1369886B1 EP 1369886 B1 EP1369886 B1 EP 1369886B1 EP 03291308 A EP03291308 A EP 03291308A EP 03291308 A EP03291308 A EP 03291308A EP 1369886 B1 EP1369886 B1 EP 1369886B1
Authority
EP
European Patent Office
Prior art keywords
segment
teeth
toothed wheel
spring
control mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03291308A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1369886A1 (fr
Inventor
Peter Von Allmen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grid Solutions SAS
Original Assignee
Areva T&D SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP1369886A1 publication Critical patent/EP1369886A1/fr
Application granted granted Critical
Publication of EP1369886B1 publication Critical patent/EP1369886B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3063—Decoupling charging handle or motor at end of charging cycle or during charged condition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19949—Teeth

Definitions

  • the invention relates to a mechanical spring drive for a circuit breaker in a high or medium voltage network, comprising a toothed wheel rotated by a spring from a first angular position to a second angular position and a pinion cooperating with the toothed wheel for the moving from the second angular position towards the first angular position in order to tension said spring, said toothed wheel having a peripheral toothing consisting on the one hand of a primitive toothing of the wheel and on the other hand of a part of denture under the shape of a retractable toothed segment, said primitive toothing being at constant pitch.
  • a circuit breaker in a high or medium voltage network is any switchgear intended for an electrical network whose operating voltage is greater than 1 kV.
  • the invention can first be applied to a mechanical control in which the toothed wheel is secured to a single control shaft coupled to a moving contact of the circuit breaker so as to close the circuit breaker by the detent of the interlocking spring which is able to drive the wheel. It can also be applied to a control in which the toothed wheel is integral with a first shaft, said interlocking shaft, which is coupled to the movable contact via a second shaft, said main shaft, as is generally the case. case in the latest generation controls for high voltage circuit breakers.
  • spring the engaging spring which is connected to the gear wheel and which is adapted to drive the latter.
  • a pawl is generally arranged opposite a cam linked in motion to the wheel toothed so that the cam bears on this pawl when the toothed wheel reaches the first angular position.
  • This pawl is generally articulated so that its release releases the gear and triggers the closure of the circuit breaker by expansion of the spring.
  • Stopping the engine by cutting off its power supply is not suitable for immobilizing the gear wheel with sufficient accuracy because the inertia of the motor delays this stop.
  • Such a control therefore generally comprises a mechanical device for uncoupling the motor from the toothed wheel when it reaches the first angular position. Without such a device, the forces generated by the inertia of the motor in the teeth and in the pawl would cause significant wear of the control which would lead quickly to its destruction.
  • the document EP 0917168 comprises a number of constituent elements that can be used in a mechanical control according to the invention.
  • the toothed wheel comprises a plurality of teeth slidable inwardly of the toothed wheel, these sliding teeth being located in an area of the toothed wheel corresponding to the position of the pinion when the toothed wheel is in the first angular position.
  • Each sliding tooth is able to retract by sliding radially against a return spring of its own. More particularly, each sliding tooth has an asymmetrical profile with a tooth head forming an inclined plane, so that when they are engaged by the pinion, the sliding teeth retract under the effect of the pressure force they undergo. from the pinion, which has the effect of mechanically uncoupling the motor of the toothed wheel.
  • These sliding teeth are spaced a distance much greater than the pitch of the toothing for the remainder of the toothed wheel, in order to facilitate the re-engagement of the pinion during the expansion of the spring.
  • the retractable teeth have a specific profile including a tooth head in the form of inclined plane which further increases the cost of manufacture.
  • the object of the invention is to overcome the disadvantages of the state of the art by proposing a system more reliable for a reduced manufacturing cost.
  • the object of the invention is a spring-loaded mechanical control device for a high-voltage circuit breaker, comprising a toothed wheel driven in rotation by a spring from a first angular position to a second angular position and a pinion cooperating with the toothed wheel for the moving from the second angular position towards the first angular position in order to tension said spring, said toothed wheel having a peripheral toothing consisting on the one hand of a primitive toothing of the wheel and on the other hand of a part of denture under the shape of a retractable toothed segment, said primitive toothing being at constant pitch, characterized in that said retractable segment comprises at least four teeth spaced one by one at the same constant pitch as the pitch of said primitive toothing.
  • the segment of retractable teeth thus comprises a conventional toothing that does not require any particular machining, which further reduces the manufacturing cost of the control according to the invention.
  • the segment is articulated in the toothed wheel by a first end, being retained by a return spring tending to keep it out.
  • This return spring may advantageously consist of an angled V-shaped blade.
  • the articulation is located inside a circle of the same diameter as the base diameter of the toothing of the toothed wheel.
  • the articulation of the segment comprises an axis which is positioned at a distance from the base diameter of between one and two times the distance separating the base diameter from the pitch diameter.
  • the segment retracts into the thickness of the toothed wheel between two plates forming flanges of the toothed wheel.
  • the toothed wheel has a small footprint, and the teeth can be made by cutting the plates.
  • the system for resetting the engagement spring 4 of a mechanical control device comprises an engagement shaft 1, a large-diameter gear wheel 2 mounted on this engagement shaft, and a non-driving motor. shown represented coupled to the toothed wheel 2 by means of a pinion 3.
  • the movable contact of the circuit breaker is coupled to the interlocking shaft by means in particular of a main shaft known per se and not shown.
  • the switching spring 4 serves to drive the switching shaft 1 to cause the closing of the circuit breaker.
  • the spring 4 has a first end connected to a first cam 5 which is mounted at the end of the engagement shaft 1 being integral with this shaft and a second end connected to the frame of the control. More particularly, the spring 4 has its first end connected to an anchoring point 5 'on the first cam via a cable 4' or a chain passing in a deflection pulley 4 ".
  • the anchoring point 5 'on the first cam 5 is eccentric with respect to the engagement shaft 1, so that when the engagement shaft is in a first angular position shown on the figure 1 the spring 4 is stretched and exerts a force tending to drive the engagement shaft in the indirect direction IND in the figure. This first angular position is close to a top dead position corresponding to a maximum tension of the spring 4.
  • the motor which drives the pinion 3, when electrically powered, serves to bring the engagement shaft 1 back to its first angular position by rotating it by approximately 180 ° in the indirect direction IND, so that the command is again armed in the position shown in the figure 1 .
  • the motor is mechanically decoupled from the gear when it reaches the first angular position through the implementation of a segment of retractable teeth.
  • the peripheral toothing of the toothed wheel 2 consists on the one hand of a primitive toothing of the wheel and on the other hand of a tooth part in the form of a retractable toothed segment 10.
  • This segment is arranged to the periphery of the toothed wheel 2 in an area corresponding to the position of the pinion 3 when the toothed wheel is in the first angular position.
  • This segment 10 may for example be slidably mounted relative to the toothed wheel 2 so as to be able to slide in a generally radial movement with respect to the locking shaft.
  • the segment 10 retracts to uncouple the pinion 3. More particularly, when the segment 10 retracts, the teeth it carries near the locking shaft to disengage the pinion 3 and the toothed wheel 2.
  • the retractable segment 10 comprises at least four teeth spaced one by one at the same constant pitch as the pitch of the primitive toothing.
  • the segment 10 when the segment 10 is in an extended position, its teeth are located in the continuity of the original toothing of the toothed wheel 2 to allow meshing of the pinion 3.
  • the teeth of the segment 10 are further normal teeth and identical to the teeth of the original teeth.
  • a minimum number of four teeth is required for a segment 10 in a control according to the invention.
  • a number of teeth between eight and twenty will be adopted in most of the mechanical control embodiments according to the invention.
  • the teeth of the segment 10 can be made with a conventional machine tool for machining gear teeth, which significantly reduces the manufacturing cost of the control according to the invention while improving the safety of operation.
  • the segment may for example retract under the effect of a mechanism managing its radial position depending on the angular position of the toothed wheel.
  • a return spring 11 shown schematically figure 2 tends to keep the segment 10 in the extended position, so that this segment 10 retracts spontaneously as soon as the pinion 3 meshes it, which will be detailed below.
  • the segment 10 has a first end fixed to the toothed wheel 2 by a hinge 12 and its other end resting on the return spring 11 which is integral with the gear wheel.
  • the hinge 12 is formed by an axis fixed to the toothed wheel and around which the segment 10 can rotate.
  • the return spring 11 is here a helical spring extending radially having one end bearing on the segment 10 and its other end bearing on the toothed wheel 2.
  • the retractable segment 10 can be made of a plastic material such as a polymer so as to form, for example, a single piece made by molding and including two protuberances forming the axis of articulation 12.
  • a spiral spring located at the axis of the hinge 12 having one end connected to the segment and its other end connected to the gear wheel is also conceivable without departing from the scope of the invention.
  • a spring 11 whose straight portions of the V-blade are each approximately the same length as the retractable segment 10 and form between them an angle of between 10 ° and 20 ° may be quite suitable, as shown figure 4 .
  • the segment 10 is thus adapted to retract by pivoting against the return spring 11. More particularly, when it is retracted the segment forms a recess in the periphery of the toothed wheel 2: the teeth of the first end move globally in the radial direction of the toothed wheel 2 towards the engagement shaft, while the teeth of the second end which are close to the joint move little, as visible figure 7 .
  • the segment and the return spring may advantageously be mounted in the thickness of the toothed wheel to reduce its bulk so that the segment retracts into the thickness of the toothed wheel to reduce its bulk, as visible on the figure 3 which is a partial sectional view of the segment and the return spring in a plane containing the engagement shaft 1.
  • the toothed wheel 2 here comprises three steel plates 2A, 2B and 2C resting on each other.
  • the center plate 2B comprises a large recess at the retractable segment 10 and is sandwiched between the two side plates which form flanges of the toothed wheel and comprise smaller recesses in this area.
  • the retractable segment is guided by the two side plates 2A and 2C between which it is free to slide radially.
  • the axis of the hinge 12 which passes through the segment 10 has each of its ends fixed to a side plate 2A, 2C.
  • the recess of the central plate 2B forms in particular a stop on which the second end of the segment 10 bears when it is out.
  • each plate has a small thickness which allows the teeth to be cut by cutting each plate instead of making this toothing by machining to further reduce the manufacturing costs of the control according to the invention.
  • the teeth which are provided with each of the plates on their periphery except the zone of the retractable segment constitute the toothing of the toothed wheel.
  • the toothed wheel may also be made with a larger number of plates so as to form a thicker toothing while producing it by cutting instead of making it by machining.
  • FIGS. 5 to 8 give a schematic representation of the operation of the resetting system of the switching spring 4 of the control corresponding to the resetting of the spring and then triggering a closing of the circuit breaker by the control. During this operation, the toothed wheel rotates in the indirect direction IND in the figures.
  • the figure 5 represents a part of the toothed wheel 2 when it is driven in rotation in the indirect direction IND by the pinion 3 to reach its first angular position.
  • the pinion 3 reaches the first end of the segment 10 being initially meshing in the toothing of this segment, which corresponds substantially to the position for which the first cam 5 comes to bear on the pawl 6.
  • the pressing forces F 1 of the pinion 3 on the toothing of the segment 10 are carried by a substantially oblique axis A 1 which is positioned such that the hinge 12 is between this axis A 1 and the engagement shaft 1. More particularly, these pressing forces F 1 are oriented from right to left on the figure 6 , such that they tend to rotate the segment 10 in the indirect direction IND about the axis of the hinge 12 so that the segment retracts as soon as it is engaged by the pinion 3.
  • the segment thus retracts naturally, which mechanically disengages the gear motor when it reaches the first angular position.
  • the pinion 3 stops in any angular position: it can be engaged in the segment 10 which is then in the extended position; or else disengaged with the segment that is then retracted as in the figure 7 .
  • the drive gear by the motor can be achieved through a clutch type system. Nevertheless, as explained in the following, the invention makes it possible to reduce these mechanical stresses so that a Direct drive of the pinion by the motor generally does not lead to premature wear of the pinion and / or retractable teeth.
  • the pinion 3 and the toothed wheel 2 spontaneously disconnect when the wheel reaches the first angular position and spontaneously reconnect when the spring is released. 4.
  • the hinge 12 of the segment 10 is located inside a circle of the same center as the wheel 2 and of the same diameter as the base diameter D B of the toothing of the wheel 2. in order to facilitate further reentry. More particularly, during the expansion of the spring 4, the pressing forces F 2 of the pinion 3 on the toothing of the segment 10 are carried by another axis A 2 also oblique. By positioning the hinge within the base diameter D B , this other axis A 2 is situated in such a way that the hinge 12 is situated between the engagement shaft and this other axis A 2 .
  • the base diameter of the toothing corresponds to the diameter of a circle centered on the wheel 2 and tangential to the axis A 2 and to the axis A 1 .
  • the axis of the hinge 12 of the segment 10 is substantially removed from the base diameter D B of the toothed wheel 2 so that the displacement of the teeth of the retractable segment 10 takes place in an oblique direction with respect to the radial direction of
  • the further the axis of the hinge 12 is close to the base diameter D B the more the displacement of the teeth of the retractable segment 10 is radial; and the further this axis is away from the base diameter D B , the greater this displacement is carried out with a substantial tangential component along an axis tangential to the toothed wheel 2.
  • the tangential component of the displacement of the teeth of the retractable segment 10 promotes an anticipated meshing of the pinion 3 of the engine, ie a meshing in a situation for which the segment 10 is not yet fully out while the toothed wheel 2 begins to drive the pinion 3 in rotation. Following the meshing spontaneously produces the output of the segment 10, as indicated above.
  • the presser forces F 2 due to the meshing are thus reduced during the exit of the segment 10, compared to a system where the axis of the hinge 12 would be closer to the base diameter D B of the toothed wheel.
  • the variation of these pressing forces is also less abrupt during this meshing start phase.
  • the fact that the teeth of the retractable segment 10 can move slightly in a tangential direction also allows a relatively progressive mechanical uncoupling between the pinion 3 and the retractable segment 10 when the pinion rotates the toothed wheel 2 and that it reaches the first angular position as shown in the figure 7 .
  • the positioning of the axis of the hinge 12 at a certain distance from the base diameter D B , as well as the arrangement of the teeth of the retractable segment 10 spaced apart from each other by the same constant pitch as on the toothed wheel 2, contribute to improving the life of a control according to the invention and also allows the use of a plastic material such as a polymer to achieve the retractable segment without risk of premature wear segment teeth.
  • the control according to the invention may also include an electric motor supply switch for managing the motor power supply as a function of the angular position of the toothed wheel.
  • the control also includes a second cam 7 integral with the engagement shaft and which cooperates with a control lever 8, as visible figure 1 .
  • This control lever 8 is rotatably mounted at a first end and has its second end held in abutment on the contour of the second cam 7 by an elastic element 8 'which is here a helical spring.
  • This control lever is linked in motion to an electrical switch (not shown) via three links 9A, 9B, 9C so as to control the power supply of the motor.
  • the contour of the second cam 7 forms a spiral arc centered on the engagement shaft which closes on itself by a recess.
  • the electrical switch When the second end of the control lever 8 is placed in the recess of the contour of the cam 7, ie as close as possible to the locking shaft 1 as visible on the figure 1 , the electrical switch is set in position to cut off the power supply of the motor which corresponds to the end of the resetting of the spring 4.
  • the electrical switch When the second end of the control lever 8 is placed on an area of the spiral arc close to the switch shaft, the electrical switch is set in position to control the power supply of the motor so as to automatically reset the spring after it has been released. The switch is thus actuated to cut off the power supply to the motor when the gearwheel reaches the first angular position while the retractable segment ensures the instantaneous disconnection of the motor.
  • This switch controls the power supply to the motor shortly before or shortly after the spring has fully relaxed to tighten the spring, that is when the shaft reaches its second angular position.
  • the spring-loaded mechanical control according to the invention is thus re-armed autonomously after each relaxation of the spring 4.

Landscapes

  • Gears, Cams (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Springs (AREA)
  • Gear Transmission (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP03291308A 2002-06-06 2003-06-02 Commande mécanique à ressort pour disjoncteur haute ou moyenne tension, comprenant une roue dentée coopérant avec un pignon Expired - Lifetime EP1369886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0206982A FR2840726B1 (fr) 2002-06-06 2002-06-06 Commande mecanique a ressort pour disjoncteur haute ou moyenne tension, comprenant une roue dentee cooperant avec un pignon
FR0206982 2002-06-06

Publications (2)

Publication Number Publication Date
EP1369886A1 EP1369886A1 (fr) 2003-12-10
EP1369886B1 true EP1369886B1 (fr) 2011-03-02

Family

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EP03291308A Expired - Lifetime EP1369886B1 (fr) 2002-06-06 2003-06-02 Commande mécanique à ressort pour disjoncteur haute ou moyenne tension, comprenant une roue dentée coopérant avec un pignon

Country Status (7)

Country Link
US (1) US6809279B2 (enrdf_load_stackoverflow)
EP (1) EP1369886B1 (enrdf_load_stackoverflow)
CN (1) CN1264175C (enrdf_load_stackoverflow)
AT (1) ATE500601T1 (enrdf_load_stackoverflow)
DE (1) DE60336191D1 (enrdf_load_stackoverflow)
FR (1) FR2840726B1 (enrdf_load_stackoverflow)
IN (1) IN2003DE00778A (enrdf_load_stackoverflow)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2420447B (en) * 2004-11-19 2008-02-27 Invensys Controls Uk Ltd Switching mechanism
US7319203B1 (en) * 2007-01-10 2008-01-15 Eaton Corporation Circuit interrupter and operating mechanism therefor
US7411145B1 (en) * 2007-04-10 2008-08-12 Eaton Corporation Motor operator de-coupling system sensing camshaft position
FR2925211B1 (fr) 2007-12-17 2010-01-15 Areva T & D Ag Commande compacte et robuste pour appareillage electrique moyennes et hautes tensions
FR2925210B1 (fr) 2007-12-17 2010-01-15 Areva T&D Ag Commande compacte pour appareillage electrique moyennes et hautes tensions
KR101291791B1 (ko) * 2011-09-05 2013-07-31 현대중공업 주식회사 가스절연 개폐기의 드라이버
CN102522232B (zh) * 2011-12-13 2014-08-13 常熟开关制造有限公司(原常熟开关厂） 断路器操作机构
FR2990051B1 (fr) 2012-04-25 2014-05-30 Alstom Technology Ltd Commande de type a ressort(s) d'un interrupteur a haute ou moyenne tension munie d'un dispositif d'accouplement a roue libre a cliquet
CN102867677A (zh) * 2012-09-26 2013-01-09 中电装备恩翼帕瓦（山东）高压开关有限公司 一种断路器弹簧储能机构的制动装置
CN102881474B (zh) * 2012-10-15 2014-12-24 上海思源高压开关有限公司 弹簧储能控制模块及其操动机构和断路器
CN104036984A (zh) * 2014-07-04 2014-09-10 特变电工中发上海高压开关有限公司 一种电动操动机构的制动装置
DE102014116398A1 (de) * 2014-11-11 2016-05-12 Eaton Electrical Ip Gmbh & Co. Kg Vorrichtung zur Betätigung eines Drehschalters
EP3113200A1 (en) * 2015-07-03 2017-01-04 General Electric Technology GmbH Drive unit for a medium voltage or high voltage circuit breaker
FR3087044B1 (fr) * 2018-10-03 2021-01-01 Schneider Electric Ind Sas Module de verrouillage d'un systeme d'armement pour appareil electrique interrupteur
CN108943612A (zh) * 2018-10-15 2018-12-07 金陵科技学院 一种抽芯距可调的注塑模具
CN110486447A (zh) * 2019-09-19 2019-11-22 广东电网有限责任公司 一种非全圆被动齿轮
EP3828442A1 (de) * 2019-11-26 2021-06-02 Maxon International AG Getriebe mit einem flexiblen zahnrad

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222946A1 (en) * 1985-11-18 1987-05-27 Pitney Bowes PLC Anti-jamming gear arrangement
JPH0693338B2 (ja) * 1987-05-13 1994-11-16 三菱電機株式会社 遮断器の操作機構
JP2529309B2 (ja) * 1987-12-11 1996-08-28 三菱電機株式会社 遮断器の操作機構
JP3271490B2 (ja) * 1995-10-12 2002-04-02 三菱電機株式会社 遮断器の操作機構
FR2763740B1 (fr) * 1997-05-26 1999-07-16 Gec Alsthom T & D Ag Mecanisme d'entrainement a ressort pour un appareil de commutation, en particulier un disjoncteur
FR2770929B1 (fr) * 1997-11-13 2000-01-28 Alsthom Gec Mecanisme d'entrainement a ressort pour un appareil de commutation, en particulier un disjoncteur

Also Published As

Publication number Publication date
FR2840726A1 (fr) 2003-12-12
IN2003DE00778A (enrdf_load_stackoverflow) 2015-06-19
EP1369886A1 (fr) 2003-12-10
CN1471117A (zh) 2004-01-28
US6809279B2 (en) 2004-10-26
ATE500601T1 (de) 2011-03-15
CN1264175C (zh) 2006-07-12
DE60336191D1 (de) 2011-04-14
FR2840726B1 (fr) 2004-11-12
US20040003989A1 (en) 2004-01-08

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