CN104241044A - Transmission mechanism and transmission method for connecting rod of extra-high voltage circuit breaker - Google Patents
Transmission mechanism and transmission method for connecting rod of extra-high voltage circuit breaker Download PDFInfo
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- CN104241044A CN104241044A CN201410547249.4A CN201410547249A CN104241044A CN 104241044 A CN104241044 A CN 104241044A CN 201410547249 A CN201410547249 A CN 201410547249A CN 104241044 A CN104241044 A CN 104241044A
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- connecting rod
- rocking bar
- movable contact
- rod
- lower link
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Abstract
The invention relates to a transmission mechanism for the connecting rod of an extra-high voltage circuit breaker, and a control method thereof. The transmission mechanism comprises a connector, a lower connecting rod, a lower rocker, a seal rod, a first upper connecting rod, a second upper connecting rod, a first upper rocker, a second upper rocker, a first movable contact rod and a second movable contact rod. When in an ON position, the angles between the lower rocker and each of the lower connecting rod and the seal rod, between the upper rocker and the upper connecting rod, and between the movable contact rods are all zero, so that the components are kept in a straight line. When in an OFF position, the angles between the lower connecting rod and the connector and between the upper connecting rod and the seal rod are both more than 45 degrees. All components are connected in a hinged manner, and the rockers are respectively hinged to the middle point of the corresponding connecting rod. The hydraulic cylinder of the hydraulic system of the connector is directly connected, is the load inputting point of the transmission mechanism, and thereby connection and disconnection of the movable contact of the circuit breaker and the stationary contact of an arc extinguish chamber are achieved. The transmission mechanism and the transmission method are strong in reliability, less in component, good in connecting and disconnecting performance, and high in efficiency; furthermore, the transmission mechanism is compact in structure, so that the circuit breaker is small in size and light in weight.
Description
Technical field
The present invention relates to a kind of driving gear of breaker and drive method, especially relate to a kind of breaker in extra high voltage jointed gear unit and drive method.
Background technology
UHV transmission is mainly used in jumbo long distance power transmission, it can reduce line corridor, reduction transmission loss, investment reduction and operating cost, alleviates the local pollution of the environment, improves the reliability of operation of power networks and realize distributing rationally of energy resources, having huge economic benefit and social benefit, is the important development direction of world power grid technology.Along with the fast development of China's economy, the demand for development of electric power is also constantly promoted.But it is uneven that the main electric power loading zone current due to China and electric power resource district exist serious distribution, and large-scale power engineering needs extra-high voltage grid to support, development UHV transmission is made to become necessity very and urgent.Primary cut-out is electrical switchgear most important, the most complicated in electric power system, and it directly controls the operation of power network line and exits, can fast shut-off faulty line, is the key equipment ensureing that network system normal reliable is run.Primary cut-out generally by operating mechanism, transmission mechanism, cut-off 5 parts such as element, support insulator and pedestal and form.The reliability of its transmission mechanism is very important, requirement can under any operational environment, line condition successfully deciliter circuit, very high requirement is had to device longevity, kinematic accuracy and component strength, transmission mechanism bumpy motion, moving not in placely all can produce huge loss, according to statistics, all types breaker mechanical fault proportion is very high, and mechanical breakdown often causes electrical malfunction simultaneously.The reliability of circuit breaker depends on the reliability of the mechanical performance of system to a great extent, i.e. the reliability of gearing.
Summary of the invention
The present invention mainly solves the technical problem existing for prior art; Provide a kind of side force suffered by divide-shut brake process minimum, breaker in extra high voltage jointed gear unit and drive method that clamping stagnation occurs in motion process can be prevented.
The present invention also has an object to be the technical problem solving grade existing for prior art; Provide that a kind of part is few, reliability is high, transmission efficiency is high, and shared space is little, and lightweight breaker in extra high voltage jointed gear unit and method.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
Comprise the joint, lower link, the seal bar that connect successively; And one end is connected to the lower rocking bar in the middle part of lower link; Seal bar top is connected with the first assembly and the second assembly that are arranged symmetrically with centered by seal bar is axial; Wherein, the first assembly comprise connect successively first on rocking bar, the first movable contact rod on connecting rod, first; Second assembly comprise connect successively second on rocking bar, the second movable contact rod on connecting rod, second;
Concrete connected mode is:
The rear end of described joint is directly directly connected with the hydraulic cylinder of hydraulic system, the front end of joint and the rear end of lower link hinged, the middle part of lower link and the upper end thereof of rocking bar; The lower end of rocking bar is hinged by fixed pin shaft O at desired location, and upper end and the seal bar lower end of lower link are hinged, the upper end of seal bar and the lower end of upper connecting rod hinged, seal bar arranges slippage pair;
On the upper end of described seal bar and first, on connecting rod, second, connecting rod lower end is hinged; On first on connecting rod, second middle-end of connecting rod respectively with first on rocking bar, second rocking bar lower end hinged; On first, on rocking bar, second, rocking bar upper end is hinged by fixed pin shaft O ' at desired location respectively; On first, on connecting rod, second, the upper end of connecting rod is hinged with one end of the first movable contact rod, the second movable contact rod respectively, and the first movable contact rod and the second movable contact rod arrange slippage pair.
Based on a breaker in extra high voltage link transmission control method for breaker in extra high voltage jointed gear unit, it is characterized in that, comprise combined floodgate, separating brake step, specific as follows:
Combined floodgate step:
In making process, joint passes through the load input point of hydraulic cylinder as transmission mechanism of hydraulic system, driving lower link moves, lower link drives lower rocking bar to rotate clockwise around fixed pin shaft O, lower link drives seal bar to move straight up, seal bar drives link motion on connecting rod, second on first, and on first, on connecting rod, second, connecting rod drives rocking bar on rocking bar on first, second to do clockwise around fixed pin shaft O ', rotate counterclockwise respectively.On first, on connecting rod, second, connecting rod drives lower plate to drive the first movable contact rod, the second movable contact rod to slide respectively near the fixed contact left and right sides, realizes the joint of moving contact and fixed contact;
In separating brake process, joint passes through the load input point of hydraulic cylinder as transmission mechanism of hydraulic system, driving lower link moves, lower link drives lower rocking bar to rotate counterclockwise around fixed pin shaft O, lower link drives seal bar to move straight down, seal bar drives link motion on connecting rod, second on first, and on first, on connecting rod, second, connecting rod drives rocking bar on rocking bar on first, second to do counterclockwise around fixed pin shaft O ', rotate clockwise respectively.On first, on connecting rod, second, connecting rod drives lower plate to drive the first movable contact rod, the second movable contact rod to slide respectively to away from the fixed contact left and right sides, realizes being separated of moving contact and fixed contact.
In above-mentioned a kind of breaker in extra high voltage link transmission control method based on breaker in extra high voltage jointed gear unit, at the end of making process, namely during breaker in extra high voltage jointed gear unit closing position, lower rocking bar and lower link and seal bar; Angle on first on rocking bar, second on rocking bar and first on connecting rod, second between connecting rod and the first movable contact rod, the second movable contact rod is 0 °, and its component is kept point-blank.At the end of separating brake process, in the angle of lower link and joint, seal bar and first, on connecting rod, second, the angle of connecting rod should be greater than 45 °.
Therefore, tool of the present invention has the following advantages: 1, the seal bar of breaker in extra high voltage jointed gear unit, the side force of movable contact rod suffered by divide-shut brake process are minimum, prevent from, in motion process, clamping stagnation occurs; 2, at combined floodgate, in separating brake transmission process, in the angle of lower link and joint, seal bar and first, on connecting rod, second, the angular range of connecting rod, in the scope being tending towards 90 °, thus reaches desirable transmission effect, and transmission efficiency is high; 3, the part shared by transmission mechanism is few, and shared space is little, makes the overall volume of circuit breaker little, lightweight and reliability is high.
Accompanying drawing explanation
Structural representation when accompanying drawing 1 is transmission mechanism closing position of the present invention.
Structural representation when accompanying drawing 2 is transmission mechanism open positions of the present invention.
Accompanying drawing 3 is lower link force analysis schematic diagrames of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
Consult shown in Fig. 1,2: the invention provides a kind of breaker in extra high voltage jointed gear unit, to comprise in joint 1, lower link 2, lower rocking bar 3, seal bar 4, first on connecting rod 5, first on connecting rod 6, second rocking bar 8, first movable contact rod 9, second movable contact rod 10 on rocking bar 7, second.
It is characterized in that adopting double break form, seal bar 4 and there is certain symmetry with upper member; Seal bar and the above arc control device being arranged in extra-high circuit breaker to moving contact.The rear end of described joint 1 is directly directly connected with the hydraulic cylinder of hydraulic system, the front end of joint 1 and the rear end jointed shaft A of lower link 2, and the middle-end of lower link 2 and the OB of lower rocking bar 3 hold jointed shaft B, lower rocking bar 3 is hinged by fixed pin shaft O at desired location, lower link 2 and seal bar 4 lower end jointed shaft C, at the desired location of seal bar 4, slippage pair is set, the upper end of seal bar 4 respectively with first on connecting rod, the lower end jointed shaft D of connecting rod on second, D ', connecting rod 5 on first, on second the middle-end of connecting rod 6 respectively with first on rocking bar 7, rocking bar 8 lower end jointed shaft E on second, F, rocking bar 7 on first, on second, rocking bar 8 desired location is hinged by fixed pin shaft O ', connecting rod 5 on first, on second the upper end of connecting rod 6 respectively with the first movable contact rod 9, the hinged G of second movable contact rod 10, H, in movable contact rod 12, the desired location of 13 arranges slippage pair.Breaker in extra high voltage jointed gear unit is in separating brake and combined floodgate transmission process, and in the angle of lower link 2 and joint 1, seal bar 4 and first, on connecting rod 5, second, the angle of connecting rod 6 should be greater than 45 °, close to the range of motion of 90 °.When closing position, joint 1, lower rocking bar 3 and lower link 2 and seal bar 4; Angle on first on rocking bar 7, second on rocking bar 8 and first on connecting rod 5, second between connecting rod 6 and the first movable contact rod 9, second movable contact rod 10 is 0 °, keeps point-blank.When open position, the angle of lower link 2 and joint 1; In seal bar 4 and first, on connecting rod 5, second, the angle of connecting rod 6 should be greater than 45 °.
In divide-shut brake process, to lower link motion and stressedly to analyze:
Shown in Fig. 1,2,3: Fig. 1,2 transmission mechanisms can be regarded as and be consisted of series and parallel connections figure (3) mechanism.Motion analysis is carried out to figure (3) below.
Getting D point for any point on lower link AC, is that initial point sets up coordinate system with O.Horizontal stroke, the ordinate of D point are:
x＝CDcosθ
1 (1)
y＝ADsinθ
1 (2)
Can be obtained by formula (1), (2):
Knownly being formula (3) for the track of any point D on lower link, is an elliptical orbit.Known by formula (3), when abscissa x is 0, and the movement locus of C point is straight line.
Known for this mechanism, seal bar and the first movable contact rod, the second movable contact rod receive minimum side force in divide-shut brake process, thus reduce seal bar and seal groove, the first movable contact rod, frictional force between the second movable contact rod and sliding tray, reduce friction work.Avoid occurring catching phenomenon in transmission process, reduce the flexural deformation of movable contact rod, reduce the end portion vibration of movable contact rod, the longitudinal direction spring of movable contact rod is reduced, strengthen the reliability of transmission mechanism divide-shut brake, improve the efficiency of transmission mechanism, make it reach better transmission effect.
Quasistatic force analysis is carried out to figure (3) lower link below:
Lower link is subject to the power F of joint
1, direction is as shown in figure (3); Lower link receives the power F of lower rocking bar, and perpendicular to the direction of lower link, direction as shown in the figure, according to the synthesis of power, can obtain (4), (5):
F
2＝F
1tanθ
1 (5)
Seal bar is for the power F of lower link
2power as figure (3) shown in.Known according to formula (5), as load force F
2for time fixing, increase θ
1f can be reduced
1, play labour-saving effect, therefore separating brake process terminate namely to close a floodgate start time, in the angle of lower link and joint, seal bar and first, on connecting rod, second, the angle of connecting rod should be greater than 45 °.
Known according to formula (5), at the end of making process, when namely separating brake process starts, θ
1when being 90 °, F
1only need minimum power.Therefore at the end of combined floodgate, and separating brake process starts rocking bar and lower link and seal bar at present; Angle on first on rocking bar, second on rocking bar and first on connecting rod, second between connecting rod and the first movable contact rod, the second movable contact rod is 0 °, and its component is kept point-blank.Greatly improve the transmission efficiency of mechanism, reach good labor-saving effect.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (3)
1. a breaker in extra high voltage jointed gear unit, is characterized in that, comprises the joint (1), lower link (2), the seal bar (4) that connect successively; And one end is connected to the lower rocking bar (3) at lower link (2) middle part; Seal bar (4) top is connected with the first assembly and the second assembly that are arranged symmetrically with centered by seal bar (4) is axial; Wherein, the first assembly comprise connect successively first on rocking bar (7), the first movable contact rod (9) on connecting rod (5), first; Second assembly comprise connect successively second on rocking bar (8), the second movable contact rod (10) on connecting rod (6), second;
Concrete connected mode is:
The rear end of described joint (1) is directly directly connected with the hydraulic cylinder of hydraulic system, the front end of joint (1) and the rear end jointed shaft A of lower link (2), and the middle-end of lower link (2) and the OB of lower rocking bar (3) hold jointed shaft B; Lower rocking bar (3) is hinged by fixed pin shaft O at desired location, and lower link (2) and seal bar (4) lower end jointed shaft C, arrange slippage pair at the desired location of seal bar (4);
The upper end of described seal bar (4) respectively with first on lower end jointed shaft D, D of connecting rod on connecting rod, second
'on first on connecting rod (5), second middle-end of connecting rod (6) respectively with first on rocking bar (8), lower end jointed shaft E, F on rocking bar (7), second, on first on rocking bar (7), second rocking bar (8) desired location by fixed pin shaft O
'hinged, on first on connecting rod (5), second upper end of connecting rod (6) respectively with the first movable contact rod (9), the second movable contact rod (10) hinged G, H, at the desired location of movable contact rod (9), (10), slippage pair is set.
2. based on a breaker in extra high voltage link transmission control method for breaker in extra high voltage jointed gear unit, it is characterized in that, comprise combined floodgate, separating brake step, specific as follows:
Combined floodgate step:
In making process, joint (1) is by the hydraulic cylinder of the hydraulic system load input point as transmission mechanism, drive lower link (2) motion, lower link (2) drives lower rocking bar (3) to rotate clockwise around fixed pin shaft O, lower link (2) drives seal bar (4) to move straight up, seal bar (4) drives link motion (6) on connecting rod (5), second on first, and on first, on connecting rod (5), second, connecting rod (6) to drive on first on rocking bar (7), second rocking bar (8) around fixed pin shaft O respectively
'do clockwise, rotate counterclockwise; On first, on connecting rod (5), second, connecting rod (6) drives lower plate to drive the first movable contact rod (9), the second movable contact rod (10) to slide respectively near the fixed contact left and right sides, realizes the joint of moving contact and fixed contact;
Separating brake step:
In separating brake process, joint (1) is by the hydraulic cylinder of the hydraulic system load input point as transmission mechanism, drive lower link (2) motion, lower link (2) drives lower rocking bar (3) to rotate counterclockwise around fixed pin shaft O, lower link (3) drives seal bar (4) to move straight down, seal bar (4) drives connecting rod (6) motion on connecting rod (5), second on first, and on first, on connecting rod (5), second, connecting rod (6) to drive on first on rocking bar (7), second rocking bar (8) around all O of steady pin respectively
'do counterclockwise, rotate clockwise; On first, on connecting rod (5), second, connecting rod (6) drives lower plate to drive the first movable contact rod (9), the second movable contact rod (10) to slide respectively to away from the fixed contact left and right sides, realizes being separated of moving contact and fixed contact.
3. a kind of breaker in extra high voltage link transmission control method based on breaker in extra high voltage jointed gear unit according to claim 2, it is characterized in that, at the end of making process, namely during breaker in extra high voltage jointed gear unit closing position, lower link (2) and lower rocking bar (3) and seal bar (4); Angle on first on connecting rod (5), second on connecting rod (6) and first on rocking bar (7), second between rocking bar (8) and the first movable contact rod (9), the second movable contact rod (10) is 0 °, and its component is kept point-blank; At the end of separating brake process, in the angle of joint (1) and lower link (2), seal bar (4) and first, on connecting rod (5), second, the angle of connecting rod (6) should be greater than 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410547249.4A CN104241044B (en) | 2014-10-15 | 2014-10-15 | A kind of breaker in extra high voltage jointed gear unit and drive method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410547249.4A CN104241044B (en) | 2014-10-15 | 2014-10-15 | A kind of breaker in extra high voltage jointed gear unit and drive method |
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| Publication Number | Publication Date |
|---|---|
| CN104241044A true CN104241044A (en) | 2014-12-24 |
| CN104241044B CN104241044B (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410547249.4A Active CN104241044B (en) | 2014-10-15 | 2014-10-15 | A kind of breaker in extra high voltage jointed gear unit and drive method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405712A (en) * | 2015-12-03 | 2016-03-16 | 平高集团有限公司 | Circuit breaker, transmission case and transmission mechanism of transmission case |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1820877A (en) * | 1927-07-01 | 1931-08-25 | Joseph D Wood | Electric switch |
| US4167720A (en) * | 1977-05-11 | 1979-09-11 | Ellenberger & Poensgen Gmbh | Circuit breaker with switching rocker |
| JP2583491B2 (en) * | 1986-08-07 | 1997-02-19 | 三菱電機株式会社 | Circuit breakers and breakers |
| CN1941244A (en) * | 2005-09-26 | 2007-04-04 | 株式会社日立制作所 | Gas circuit-breaker |
| CN101587795A (en) * | 2009-07-01 | 2009-11-25 | 河南平高电气股份有限公司 | A kind of circuit breaker and have the system of this circuit breaker |
-
2014
- 2014-10-15 CN CN201410547249.4A patent/CN104241044B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1820877A (en) * | 1927-07-01 | 1931-08-25 | Joseph D Wood | Electric switch |
| US4167720A (en) * | 1977-05-11 | 1979-09-11 | Ellenberger & Poensgen Gmbh | Circuit breaker with switching rocker |
| JP2583491B2 (en) * | 1986-08-07 | 1997-02-19 | 三菱電機株式会社 | Circuit breakers and breakers |
| CN1941244A (en) * | 2005-09-26 | 2007-04-04 | 株式会社日立制作所 | Gas circuit-breaker |
| CN101587795A (en) * | 2009-07-01 | 2009-11-25 | 河南平高电气股份有限公司 | A kind of circuit breaker and have the system of this circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| 孟凡刚等: "特高压断路器连杆传动机构效率优化研究", 《机电工程》, vol. 31, no. 7, 31 July 2014 (2014-07-31), pages 819 - 822 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405712A (en) * | 2015-12-03 | 2016-03-16 | 平高集团有限公司 | Circuit breaker, transmission case and transmission mechanism of transmission case |
| CN105405712B (en) * | 2015-12-03 | 2018-06-08 | 平高集团有限公司 | A kind of transmission mechanism of breaker and transmission case and transmission case |
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| Publication number | Publication date |
|---|---|
| CN104241044B (en) | 2017-06-27 |
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