CN106682305A - Method for reducing transient impact load of switch operating mechanism insulating pull rod - Google Patents
Method for reducing transient impact load of switch operating mechanism insulating pull rod Download PDFInfo
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- CN106682305A CN106682305A CN201611219651.5A CN201611219651A CN106682305A CN 106682305 A CN106682305 A CN 106682305A CN 201611219651 A CN201611219651 A CN 201611219651A CN 106682305 A CN106682305 A CN 106682305A
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Abstract
The invention discloses a method for reducing a transient impact load of a switch operating mechanism insulating pull rod and belongs to the field of high-voltage switch and digital simulation study. The method comprises a first step of establishing a transient dynamics finite element model according to a geometric model of a switch, implementing dynamic calculation of the high-voltage switch separating brake process, and extracting a transient impact load peak of the insulating pull rod; a second step of parameterizing a contact surface shape; a third step of performing design of experiment (DOE) calculation and sensitivity analysis; and a fourth step of utilizing an optimization algorithm to search an optimal reference point and producing an optimal spline. According to the method, impact stress generated on the insulating pull rod during switch motion can be effectively reduced, and switch reliability is improved.
Description
【Technical field】
It is more particularly to a kind of to reduce speed-sensitive switch operating mechanism the invention belongs to high-voltage switch gear and Research of digital simulation field
The method of insulated tension pole transient impact load.
【Background technology】
With the development of power system, requirement more and more higher of the power system to power switch.By vortex repulsion principle
Electromagnetic repulsion force operating mechanism due to there is focus that is prominent and turning into research in terms of rapidity and reliability.Repulsion is grasped
Motivation structure have the advantages that simple structure, responsiveness be exceedingly fast, reliability it is high, therefore obtained the attention of domestic and foreign scholars and ground
Study carefully.
Electromagnetic repulsion mechanism is connected to form the vacuum switch of high speed with vacuum interrupter, during vacuum switch sub-switching operation, by
The repulsion peak value produced in electromagnetic repulsion mechanism can reach tens or even hundreds of kN so that play the insulated tension pole meeting of gearing
It is subjected to huge pulse repulsion impacting repeatedly, is easily broken, so as to cause vacuum switch reliability to drastically reduce.Through undue
Analysis finds that the transmission of power is completed by the touch spring component of vacuum switch, and in transmittance process in touch spring component
Two parts come in contact collision can cause impact loading repeatedly on insulated tension pole, so as to cause to insulated tension pole
Stress impact.
【The content of the invention】
The present invention is for the deficiency in existing high-voltage switch gear high speed operating mechanism technology, it is proposed that one kind reduces switch actuating
The method of mechanism's insulated tension pole transient impact load, makes it on the basis of existing technology, by the optimization to parts shape,
Realize in the case where mechanism action speed is not influenceed, the effective collision rift that reduces produces transient impact to carry on insulated tension pole
Lotus, so as to improve the reliability of switch.
The present invention is realized by the following method：
A kind of method for reducing switch operation mechanism insulated tension pole transient impact load, comprises the following steps：
1) according to the geometrical model of switch operation mechanism, Transient Dynamics FEM model is set up, completes dynamics calculation,
Put forward transient impact load peaks；
2) form parameter of insulated tension pole contact surface；
3) experimental design is calculated：
A, change contact surface physical dimension；
B, regenerate FEM model and calculate, extract transient impact load peaks；
C, record contact surface physical dimension and transient impact load peaks；
D, repeatedly step a~c；
4) using optimized algorithm find size it is optimal with reach transient impact load it is minimum and realize intensity meet require
Optimized parameter point, produce optimal SPL.
In step 1) it is specially：According to switch operation mechanism two-dimensional axial symmetric model, the Transient Dynamics finite element of foundation
Model, the curve that the driving force of input switch operating mechanism is changed over time records the subtransient of insulated tension pole as excitation
The peak value of shock loading, as the value contrasted with optimum results.
Step 2) in, for two dimensional model, contact surface being changed into two curves of contact, its parameterized procedure is：
2.1) n control point is respectively set up on the contour curve of contact surface；
2.2) two SPLs are generated by this 2n point.
4th, the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 3, its feature
It is：It is specially in step b)：
3.1) after changing the value of contact surface parameter of curve point, new Transient Dynamics FEM model is set up, by what is set up
The polygon that two parametric curves are closed with the generation of other lines respectively, and the polygon before replacement, and it is new many for what is generated
Side shape grid division；
3.2) in step 2) in contact is set on newly-generated SPL；
3.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
In step 4) in, comprehensive to use gradient optimal method and Boeing heuristic algorithm, the curve to parameterizing is optimized
Calculate, the peak value of the transient impact load for obtaining is with the peakedness ratio of subtransient shock loading compared with minimum with transient impact load
Be target, find size it is optimal with reach transient impact load it is minimum and realize intensity meet require optimized parameter point；Its
In, dimensionally-optimised design variable is contact surface shape.
Step 3) in also include sensitivity analysis step：
According to each parameter of curve for calculating and shock loading peak value, each parameter is generated quick for shock loading peak value
Sensitivity, according to the globally optimal solution of sensitivity analysis judgment curves parameter.
Relative to prior art, the invention has the advantages that：
The method that the present invention reduces Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated tension pole transient impact load, to reduce electromagnetic repulsion force punching
Hit power, be engineered to optimization aim using mechanism, using simulation software ANSYS Mechanical and optimized algorithm, to true
Two component contact faces carry out parametric simulation calculating in air switch shutting mechanism touch spring, obtain setting for one group of optimization of the contact surface
Meter parameter.By the optimization to parts shape, the situation of breaker acting speed can not influenceed after the parameter of optimizing application
Under, it is effective to reduce the impact stress produced on insulated tension pole during switch motion, improve the reliability of switch.
Further, DOE is calculated and sensitivity analysis can prevent from only trying to achieve locally optimal solution rather than the overall situation during optimization calculating
Optimal solution.
【Brief description of the drawings】
Fig. 1 is reduction high-voltage operating mechanism insulated tension pole transient impact bearing method stream provided in an embodiment of the present invention
Cheng Tu；
Fig. 2 is contact surface position provided in an embodiment of the present invention partial enlarged drawing；
Fig. 3 is the sensitivity analysis figure of contact surface geometric parameter provided in an embodiment of the present invention.
【Specific embodiment】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated, it will be appreciated that the specific embodiments described herein are merely illustrative of the present invention, is not used to
Limit the present invention.The present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, giving a kind of of present invention offer reduces Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated tension pole transient impact
The method flow of load.For convenience of description, illustrate only part related to the present invention.
The method of the reduction Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated tension pole transient impact load of the embodiment of the present invention, the method
Step includes：
Step one, according to switch geometrical model, set up Transient Dynamics FEM model, complete vacuum switch separating brake process
Dynamics calculation, extract insulated tension pole transient impact load peaks.
For the contact spring component of vacuum switchgear, generally axisymmetric model, therefore, actual mechanism model is usual
It is two-dimensional axial symmetric model.The Transient Dynamics FEM model set up for example in ANSYS Mechanical, input mechanism
The curve that changes over time of driving force as excitation, by the peak value of the transient impact load of interested part (such as insulated tension pole)
Record, as the value contrasted with optimum results.
Step 2, the shape of contact surface (physical dimension) parametrization.
As described in step one, for two dimensional model, contact surface is to be changed into two curves of contact, then two curves
Parameterized procedure be：(1) n control point is respectively set up on the contour curve of contact surface；(2) two are generated by this 2n point
SPL；
As shown in Fig. 2 in the contour line in making contact face, 8 parameter x1~x4 and y1~y4 are defined on the contact surface, and
Two SPLs are formed respectively.
The new FEM model of step 3, generation.
1) changing the value of contact surface parameter of curve point can destroy the FEM calculation setting carried out in step one, therefore need
Set up new Transient Dynamics FEM model.
1.1) polygon that two parametric curves that will be set up in step 2 are closed with the generation of other lines respectively, and replace
Polygon before, and be the new polygon grid division of generation；
1.2) contact is set in step 2 on newly-generated SPL,
1.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
2) experimental design (DOE) is calculated and sensitivity analysis
Locally optimal solution rather than globally optimal solution are only tried to achieve when DOE is calculated and sensitivity analysis can prevent optimization from calculating；
By above-mentioned steps 1) in Content Implementation repeatedly, and each parameter of curve for calculating and shock loading peak value are recorded,
The susceptibility of DOE result of calculations and each parameter for shock loading peak value is ultimately produced, is implementation of the present invention as shown in table 1
The DOE result of calculations that example is provided are (wherein：This DOE is calculated and be have recorded 70 class values).
Table 1
As shown in figure 3, the susceptibility for each parameter for shock loading peak value.According to each parameter of curve for calculating and
Shock loading peak value, generates susceptibility of each parameter for shock loading peak value, according to sensitivity analysis judgment curves parameter
Globally optimal solution.
Step 4, optimized parameter point is found using optimized algorithm, produce optimal SPL.
The DOE of Maximal shock load peak value is calculated and sensitivity analysis according to the parametric curve completed in step 4.
Gradient optimal method and Boeing heuristic algorithm comprehensively are used, the curve to parameterizing optimizes calculating, by seeking size
It is optimal with reach transient impact load it is minimum and realize intensity meet require, so as to reach design object.In the optimization, wink
The minimum target of state shock loading, dimensionally-optimised design variable is contact surface shape.
As shown in table 2, contact surface geometric parameter final optimization pass result provided in an embodiment of the present invention.Contact surface is set to this
It is dimensioned such that insulated tension pole axial tension peak value reduces 25.5%.
Table 2
| x1 | x2 | x3 | x4 | y1 | y2 | y3 | y4 |
| 0.71 | 0.42 | 1 | 0.14 | -0.7 | 1 | 0.45 | 0.71 |
Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing each reality
Apply example to be described in detail the present invention, those skilled in the art can be to described specific reality
Apply the technical scheme described by example to modify, or equivalent is carried out to which part or all technical characteristic；And this
A little modifications are replaced, and do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (6)
1. it is a kind of reduce switch operation mechanism insulated tension pole transient impact load method, it is characterised in that comprise the following steps：
1) according to the geometrical model of switch operation mechanism, Transient Dynamics FEM model is set up, completes dynamics calculation, carry wink
State shock loading peak value；
2) form parameter of insulated tension pole contact surface；
3) experimental design is calculated：
A, change contact surface physical dimension；
B, regenerate FEM model and calculate, extract transient impact load peaks；
C, record contact surface physical dimension and transient impact load peaks；
D, repeatedly step a~c；
4) using optimized algorithm find size it is optimal with reach transient impact load it is minimum and realize intensity meet require most
Excellent parameter point, produces optimal SPL.
2. the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 1, it is characterised in that：
In step 1) it is specially：According to switch operation mechanism two-dimensional axial symmetric model, the Transient Dynamics FEM model of foundation, input
The curve that the driving force of switch operation mechanism is changed over time records the subtransient shock loading of insulated tension pole as excitation
Peak value, as the value contrasted with optimum results.
3. the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 2, it is characterised in that：
Step 2) in, for two dimensional model, contact surface being changed into two curves of contact, its parameterized procedure is：
2.1) n control point is respectively set up on the contour curve of contact surface；
2.2) two SPLs are generated by this 2n point.
4. the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 3, it is characterised in that：
It is specially in step b)：
3.1) after changing the value of contact surface parameter of curve point, new Transient Dynamics FEM model is set up, two for setting up
The polygon that parametric curve is closed with the generation of other lines respectively, and the polygon before replacement, and be the new polygon of generation
Grid division；
3.2) in step 2) in contact is set on newly-generated SPL；
3.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
5. the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 4, it is characterised in that：
In step 4) in, comprehensive to use gradient optimal method and Boeing heuristic algorithm, the curve to parameterizing optimizes calculating, obtains
The peak value of transient impact load and the peakedness ratio of subtransient shock loading compared with the minimum target of transient impact load, seeking
Look for size it is optimal with reach transient impact load it is minimum and realize intensity meet require optimized parameter point；Wherein, size is excellent
The design variable of change is contact surface shape.
6. the method for reducing switch operation mechanism insulated tension pole transient impact load as claimed in claim 1, it is characterised in that：
Step 3) in also include sensitivity analysis step：
According to each parameter of curve for calculating and shock loading peak value, sensitivity of each parameter for shock loading peak value is generated
Degree, according to the globally optimal solution of sensitivity analysis judgment curves parameter.
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Cited By (3)
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| CN107180141A (en) * | 2017-06-12 | 2017-09-19 | 电子科技大学 | Gear reduction unit casing reliability optimization method based on radial direction base agent model |
| CN111950078A (en) * | 2020-07-27 | 2020-11-17 | 中国第一汽车股份有限公司 | Door-closing impact load-based anti-shaking design method for passenger exterior rearview mirror |
| CN112214846A (en) * | 2020-09-09 | 2021-01-12 | 浙江意动科技股份有限公司 | Method for reducing stress concentration |
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| CN112214846A (en) * | 2020-09-09 | 2021-01-12 | 浙江意动科技股份有限公司 | Method for reducing stress concentration |
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| CN106682305B (en) | 2019-10-29 |
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Effective date of registration: 20210908 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an province high tech Zone No. 7 Tang Xing Lu Patentee before: CHINA XD ELECTRIC Co.,Ltd. |
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Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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