CN106682305B - A method of reducing switch operation mechanism insulated pull rod transient impact load - Google Patents
A method of reducing switch operation mechanism insulated pull rod transient impact load Download PDFInfo
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Abstract
The invention discloses a kind of methods for reducing switch operation mechanism insulated pull rod transient impact load, belong to high-voltage switch gear and Research of digital simulation field.Method includes the following steps: 1, according to switch geometrical model, establish Transient Dynamics finite element model, complete the dynamics calculation of high-voltage switch gear separating brake process, extract insulated pull rod transient impact load peaks.2, the form parameter of contact surface.3, experimental design (DOE) calculating and sensitivity analysis.4, optimized parameter point is found using optimization algorithm, produces optimal spline curve.This method can effectively reduce the impact stress generated in insulated pull rod when switch motion, improve switch reliability.
Description
[technical field]
The invention belongs to high-voltage switch gear and Research of digital simulation field, in particular to a kind of reduction high-speed switch operating mechanism
The method of insulated pull rod transient impact load.
[background technique]
With the development of electric system, requirement of the electric system to power switch is higher and higher.By vortex repulsion principle
Electromagnetic repulsion force operating mechanism due to have the advantages that in terms of rapidity and reliability it is prominent into for research hot spot.Repulsion behaviour
Motivation structure has the advantages that structure is simple, movement speed is exceedingly fast, high reliablity, therefore has obtained the attention of domestic and foreign scholars and ground
Study carefully.
Electromagnetic repulsion mechanism and vacuum interrupter are connected to form the vacuum switch of high speed, when vacuum switch sub-switching operation, by
Tens even several hundred kN can be reached in the repulsion peak value that electromagnetic repulsion mechanism generates, so that playing the insulated pull rod meeting of transmission effect
By the impact of huge pulse repulsion repeatedly, easily it is broken, is drastically reduced so as to cause vacuum switch reliability.Through excessive
Analysis discovery, the transmitting of power is completed by the touch spring component of vacuum switch, and in transmittance process in touch spring component
Two components are in contact the impact loading collided will lead to repeatedly in insulated pull rod, to cause to insulated pull rod
Stress impact.
[summary of the invention]
The present invention proposes a kind of reduction switch actuating for the deficiency in existing high-voltage switch gear high speed operating mechanism technology
The method of mechanism insulated pull rod transient impact load, makes it on the basis of existing technology, by the optimization to components shape,
It realizes in the case where not influencing mechanism action speed, generates transient impact in insulated pull rod after effective reduction collision and carry
Lotus, to improve the reliability of switch.
The present invention is realized by the following method:
A method of reducing switch operation mechanism insulated pull rod transient impact load, comprising the following steps:
1) according to the geometrical model of switch operation mechanism, Transient Dynamics finite element model is established, completes dynamics calculation,
Propose transient impact load peaks；
2) form parameter of insulated pull rod contact surface；
3) experimental design calculates:
A, change contact surface geometric dimension；
B, it regenerates finite element model and calculates, extract transient impact load peaks；
C, contact surface geometric dimension and transient impact load peaks are recorded；
D, it is repeated as many times step a~c；
4) the optimal minimum and realize that intensity is met the requirements to reach transient impact load of size is found using optimization algorithm
Optimized parameter point, produce optimal spline curve.
In step 1) specifically: 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 changes over time record the subtransient of insulated pull rod as excitation
The peak value of shock loading, as the value compared with optimum results.
In step 2), for two dimensional model, contact surface is changed into the curve of two contacts, parameterized procedure are as follows:
2.1) n control point is respectively established on the contour curve of contact surface；
2.2) two spline curve are generated by this 2n point.
4, the method for reducing switch operation mechanism insulated pull rod transient impact load as claimed in claim 3, feature
It is: in step b) specifically:
3.1) after the value for changing contact surface parameter of curve point, new Transient Dynamics finite element model is established, by foundation
Two parametric curves generate closed polygon, and the polygon before replacement with other lines respectively, and new more for what is generated
Side shape grid division；
3.2) contact is set in the spline curve regenerated after changing contact surface geometric dimension；
3.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
It is comprehensive to use gradient optimal method and Boeing heuristic algorithm in step 4), the curve of parametrization is optimized
It calculates, the peak value of obtained transient impact load is minimum with transient impact load compared with the peak value of subtransient shock loading
For target, the optimal minimum and realize the optimized parameter point that intensity meets the requirements to reach transient impact load of size is found；Its
In, dimensionally-optimised design variable is contact surface shape.
Further include sensitivity analysis step in step 3):
According to the parameter of curve and shock loading peak value calculated every time, each parameter is generated for the quick of shock loading peak value
Sensitivity, according to the globally optimal solution of sensitivity analysis judgment curves parameter.
Compared with the existing technology, the invention has the following advantages:
The method that the present invention reduces Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated pull rod transient impact load, to reduce electromagnetic repulsion force punching
It hits power, be engineered to optimization aim using mechanism, using simulation software ANSYS Mechanical and optimization algorithm, to true
It is spaced apart two component contact faces in shutting mechanism touch spring and carries out parametric simulation calculating, obtains setting for one group of optimization of the contact surface
Count parameter.It, can be the case where not influencing breaker acting speed after the parameter of optimizing application by the optimization to components shape
Under, it is effective to reduce the impact stress generated in insulated pull rod when switch motion, improve the reliability of switch.
Further, DOE is calculated and sensitivity analysis can prevent optimization from only acquiring locally optimal solution rather than global when calculating
Optimal solution.
[Detailed description of the invention]
Fig. 1 is reduction high-voltage switch operating mechanism insulated pull rod 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 view；
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 objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
Be further elaborated, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, not to
Limit the present invention.The invention will be described in further detail with reference to the accompanying drawing:
As shown in Figure 1, giving a kind of reduction Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated pull rod transient impact provided by the invention
The method flow of load.For ease of description, only the parts related to the present invention are shown.
The method of the reduction Magnetic Actuator for Vacuum Circuit Breaker mechanism insulated pull rod transient impact load of the embodiment of the present invention, this method
Step includes:
Step 1: establishing Transient Dynamics finite element model according to switch geometrical model, vacuum switch separating brake process is completed
Dynamics calculation, extract insulated pull rod transient impact load peaks.
For the contact spring component of vacuum switchgear, generally axisymmetric model, therefore, actual mechanism model is usual
For two-dimensional axial symmetric model.Such as the Transient Dynamics finite element model established 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 component (such as insulated pull rod)
It records, as the value compared with optimum results.
Step 2: the shape (geometric dimension) of contact surface parameterizes.
As described in step 1, for two dimensional model, contact surface is the curve for being changed into two contacts, then two curves
Parameterized procedure are as follows: (1) n control point is respectively established on the contour curve of contact surface；(2) two are generated by this 2n point
Spline curve；
As shown in Fig. 2, the contour line in making contact face, defines 8 parameters x1~x4 and y1~y4 on the contact surface, and
It is respectively formed two spline curve.
Step 3: generating new finite element model.
1) value for changing contact surface parameter of curve point can destroy the FEM calculation setting carried out in step 1, therefore need
Establish new Transient Dynamics finite element model.
1.1) establish in step 2 two parametric curves are generated into closed polygon with other lines respectively, and replaced
Polygon before, and the new polygon grid division to generate；
1.2) contact is set in newly-generated spline curve in step 2,
1.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
2) experimental design (DOE) calculating and sensitivity analysis
DOE is calculated and sensitivity analysis can prevent optimization from only acquiring locally optimal solution rather than globally optimal solution when calculating；
By above-mentioned steps 1) in Content Implementation it is multiple, and the parameter of curve and shock loading peak value that calculate every time are recorded,
DOE calculated result and each parameter are ultimately produced for the susceptibility of shock loading peak value, as shown in table 1, is implemented for the present invention
The DOE calculated result that example provides (wherein: the secondary DOE is calculated and had recorded 70 class values).
Table 1
As shown in figure 3, being each parameter for the susceptibility of shock loading peak value.According to the parameter of curve calculated every time and
Shock loading peak value generates each parameter for the susceptibility of shock loading peak value, according to sensitivity analysis judgment curves parameter
Globally optimal solution.
Step 4: finding optimized parameter point using optimization algorithm, optimal spline curve is produced.
DOE calculating and sensitivity analysis according to the parametric curve completed in step 3 to Maximal shock load peak value.
Synthesis has used gradient optimal method and Boeing heuristic algorithm, calculating is optimized to the curve of parametrization, by seeking size
It is optimal minimum and realize that intensity is met the requirements to reach transient impact load, to reach design object.In the optimization, wink
The minimum target of state shock loading, dimensionally-optimised design variable are contact surface shapes.
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 as this
It is dimensioned such that insulated pull rod 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 |
The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；Although referring to aforementioned each reality
Applying example, invention is explained in detail, and those skilled in the art can be to described specific reality
It applies technical solution described in example to modify, or equivalent substitution of some or all of the technical features；And this
It modifies or replaces, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of method for reducing switch operation mechanism insulated pull rod transient impact load, which comprises the following steps:
1) according to the geometrical model of switch operation mechanism, Transient Dynamics finite element model is established, dynamics calculation is completed, mentions wink
State shock loading peak value；
2) form parameter of insulated pull rod contact surface；
3) experimental design calculates:
A, change contact surface geometric dimension；
B, it regenerates finite element model and calculates, extract transient impact load peaks；
C, contact surface geometric dimension and transient impact load peaks are recorded；
D, it is repeated as many times step a~c；
Further include sensitivity analysis step in step 3):
According to the parameter of curve and shock loading peak value calculated every time, each parameter is generated for the sensitivity of shock loading peak value
Degree, according to the globally optimal solution of sensitivity analysis judgment curves parameter；
4) the optimal minimum and realize that intensity is met the requirements most to reach transient impact load of size is found using optimization algorithm
Excellent parameter point produces optimal spline curve.
2. reducing the method for switch operation mechanism insulated pull rod transient impact load as described in claim 1, it is characterised in that:
In step 1) specifically: according to switch operation mechanism two-dimensional axial symmetric model, the Transient Dynamics finite element model of foundation, input
The curve that the driving force of switch operation mechanism changes over time records the subtransient shock loading of insulated pull rod as excitation
Peak value, as the value compared with optimum results.
3. reducing the method for switch operation mechanism insulated pull rod transient impact load as claimed in claim 2, it is characterised in that:
In step 2), for two dimensional model, contact surface is changed into the curve of two contacts, parameterized procedure are as follows:
2.1) n control point is respectively established on the contour curve of contact surface；
2.2) two spline curve are generated by this 2n point.
4. reducing the method for switch operation mechanism insulated pull rod transient impact load as claimed in claim 3, it is characterised in that:
Step b specifically:
3.1) after the value for changing contact surface parameter of curve point, new Transient Dynamics finite element model is established, by two of foundation
Parametric curve generates closed polygon, and the polygon before replacement, and the new polygon to generate with other lines respectively
Grid division；
3.2) contact is set in the spline curve regenerated after changing contact surface geometric dimension；
3.3) Transient Dynamics calculating is re-started, and extracts component transient impact load peaks.
5. reducing the method for switch operation mechanism insulated pull rod transient impact load as claimed in claim 4, it is characterised in that:
It is comprehensive to use gradient optimal method and Boeing heuristic algorithm in step 4), calculating is optimized to the curve of parametrization, is obtained
Transient impact load peak value compared with the peak value of subtransient shock loading, with the minimum target of transient impact load, seek
Look for the optimal minimum and realize the optimized parameter point that intensity meets the requirements to reach transient impact load of size；Wherein, size is excellent
The design variable of change is contact surface shape.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107180141B (en) * | 2017-06-12 | 2021-01-05 | 电子科技大学 | Gear reducer box reliability optimization method based on radial basis agent model |
| CN111950078B (en) * | 2020-07-27 | 2022-07-15 | 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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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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