CN107658161A - A kind of low-voltage electrical apparatus accessory - Google Patents
A kind of low-voltage electrical apparatus accessory Download PDFInfo
- Publication number
- CN107658161A CN107658161A CN201610592990.1A CN201610592990A CN107658161A CN 107658161 A CN107658161 A CN 107658161A CN 201610592990 A CN201610592990 A CN 201610592990A CN 107658161 A CN107658161 A CN 107658161A
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- China
- Prior art keywords
- low
- electrical apparatus
- voltage electrical
- accessory
- apparatus accessory
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of low-voltage electrical apparatus accessory, its three electric insulating tube for including low-voltage electrical apparatus support frame and being connected with external circuitses for low-voltage electrical apparatus and being insulated with extraneous phase.Low-voltage electrical apparatus accessory provided by the invention is tested available for vibratory impulse actual effect simulation analysis, can be by carrying out vibratory impulse actual effect simulation analysis to the low-voltage electrical apparatus accessory, avoid actual effect to carry out structure optimization in the case of vibratory impulse for low-voltage electrical apparatus accessory to provide foundation with design, there is research application value.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus accessory.
Background technology
Low-voltage electrical apparatus is a kind of signal that can be according to the external world and requirement, manually or automatically connects or disconnects circuit, with
Realize the element and equipment of switching, control, protection, detection, conversion and the regulation to circuit or non-electrical object.In recent years, with
The electrified, raising of automatization level, low-pressure electronic equipment product obtain in fields such as industrial automation, household electrical appliance, automobile, communications
It is widely applied.Meanwhile various low-voltage electrical apparatuses are also using in power system and low-voltage distribution system, if these low tensions
Device, which breaks down, to be resulted in power system and low-voltage distribution system and breaks down and cause power outage, or even entail dangers to supply lines
Road and the safety of electrical equipment, the economic loss caused by it will be more huge.According to standard GB/T 14048.5-2008
《Low voltage switch equipment and the part of control device the 5th：Control circuit electrical equipment and switch element》Requirement, the break-make of low-voltage electrical apparatus
Energy and life-span are not only the general performance of Design and machining of products technique, and weigh the good and bad important finger of low-voltage electrical apparatus performance
Mark.Therefore, the reliability consideration tool for carrying out various low-voltage electrical apparatuses is of great significance.
Low-voltage electrical apparatus is in the process of running due to improper use, the long-term component aging and by surrounding environment of putting into operation
The reason such as vibratory impulse failure occurs, and failure mode is various.For example, in low-voltage electrical apparatus impact vibrated, meeting
Cause contact to come off and cause loose contact；Because operating frequency is too high, make contact in the process lasting vibration and cause to touch
The Fast Wearing of head；Because dynamic/static contact contact resistance is excessive or excessive by electric current, contact is caused to overheat, when contact temperature surpasses
When crossing permissible value, contact characteristic is degenerated, or even produce melting welding etc..
Due to importance of the low-voltage electrical apparatus in whole power industry and the property of its own easy break-down so as to low
Piezoelectricity device, which is tested, test and to carry out analysis and research to failure factor and seems to be even more important.The test event master of low-voltage electrical apparatus
To include general inspection, voltage drop measure, temperature rise test experiments, insulaion resistance and voltage-withstand test, specified connection and capacity of decomposition
Test, short circuit making and breaking capacity test, KA Rms aptitude tests, acting characteristic test, life test, immunity to interference
Test etc..Foreign scholar is primarily intended to the research to low-voltage electrical apparatus field failure diagnostic system, and the country is in the low-voltage electrical apparatus life-span
Make a few thing in terms of the research of test device, meanwhile, domestic some scholars are carried out in terms of low-voltage electrical apparatus emulation technology
Research, mainly including thermal process analysis, electromagnetic transient specificity analysis, mechanism action specificity analysis, switching arc analysis.So
And in the analysis to low-voltage electrical apparatus function effect factor, also low-voltage electrical apparatus accessory vibratory impulse actual effect is not emulated
The research of analysis.
The content of the invention
It is very big in view of influence of the vibratory impulse to low-voltage electrical apparatus and its accessory, can it is an object of the invention to provide one kind
For the low-voltage electrical apparatus accessory of vibratory impulse actual effect simulation analysis experiment, vibratory impulse reality is carried out to low-voltage electrical apparatus accessory to realize
Imitate true analysis and research, for low-voltage electrical apparatus accessory avoided in the case of vibratory impulse actual effect carry out structure optimization with design provide according to
According to.
A kind of low-voltage electrical apparatus accessory, including low-voltage electrical apparatus support frame and be connected for low-voltage electrical apparatus with external circuitses and with it is outer
Three electric insulating tubes that boundary mutually insulate.
As a kind of preferred scheme, the cross sectional shape of described low-voltage electrical apparatus support frame is L-type.
As a kind of preferred scheme, described electric insulating tube is formed by two hollow cylinders are orthogonal.
As further preferred scheme, described low-voltage electrical apparatus support frame is made of carbon steel Q265.
As further preferred scheme, described electric insulating tube is made of epoxy resin.
Compared with prior art, the present invention has the advantages that：
The present invention provides a kind of low-voltage electrical apparatus accessory available for the experiment of vibratory impulse actual effect simulation analysis first, by institute
State low-voltage electrical apparatus accessory and carry out vibratory impulse actual effect simulation analysis, can be that low-voltage electrical apparatus accessory avoids reality in the case of vibratory impulse
Effect carries out structure optimization and provides foundation with design, has research application value.
Brief description of the drawings
Fig. 1 is a kind of structural representation of low-voltage electrical apparatus accessory provided by the invention；
Fig. 2 is internal stress distribution figure of the low-voltage electrical apparatus accessory under vibratory impulse described in embodiment.
In figure：1st, low-voltage electrical apparatus support frame；2nd, electric insulating tube；3rd, at stress distribution concentration.
Embodiment
Technical scheme is elaborated further with specific embodiment below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of low-voltage electrical apparatus accessory provided by the invention, including low-voltage electrical apparatus support frame 1 and for low-voltage electrical apparatus
Three electric insulating tubes 2 for being connected with external circuitses and being insulated with extraneous phase；The cross sectional shape of described low-voltage electrical apparatus support frame 1 is
L-type, it is made of carbon steel Q265；Described electric insulating tube 2 is formed by two hollow cylinders are orthogonal, using epoxy resin system
Into.
The method that vibratory impulse actual effect simulation analysis are carried out to described low-voltage electrical apparatus accessory, comprises the following steps：
A) FEM model of low-voltage electrical apparatus accessory, including following operating procedure are established：
1. create the 3-D geometric model of low-voltage electrical apparatus accessory and material properties and mesh generation cell type are set；
2. mesh generation is carried out to the 3-D geometric model of establishment；
3. constraint is applied to the model for carrying out mesh generation；
B) internal stress size and distribution of the low-voltage electrical apparatus accessory under vibratory impulse are analyzed；
C) according to analysis result, the structure of low-voltage electrical apparatus accessory is optimized.
As a kind of preferred scheme, 1. step sets SOLID45 or/and SHELL181 as mesh generation cell type,
Step is 2. using freely（free）Grid division mode carries out mesh generation, 3. step applies 6 to the model for carrying out mesh generation
The boundary condition constraint of the individual free degree.
Simulating analysis of the present invention can use Ansys softwares to realize；Described Ansys softwares be molten bonding structure,
Fluid, electric field, magnetic field, Analysis of The Acoustic Fields are in the large-scale general finite element analysis software of one, by finite element fraction maximum in the world
The U.S. ANSYS exploitations of one of software company are analysed, it can realize the shared of data and exchange, such as with most CAD software interfaces
Pro/Engineer, NASTRAN, Alogor, I-DEAS, AutoCAD etc., be advanced CAE instruments in new detection technology it
One.
Embodiment
Vibratory impulse actual effect simulation analysis are carried out to low-voltage electrical apparatus accessory of the present invention using Ansys softwares：
Step 1：Establish the FEM model of low-voltage electrical apparatus accessory
1st, the 3-D geometric model of low-voltage electrical apparatus accessory is created, and material properties and mesh generation cell type are set
The present invention have ignored between electric insulating tube and L-type support base when establishing the 3-D geometric model of low-voltage electrical apparatus accessory
Adhesive surface and relative motion.
The Q265 material parameters wherein used for：Density p=7.84 × 103kg/cm3, Young's modulus E=2 × 1011Pa, pool
Pine is than μ=0.3；The epoxide resin material parameter used for：Density p=1.7 × 103kg/cm3, Young's modulus E=10.2 × 103Pa,
Poisson's ratio μ=0.42.
Mesolow electrical accessorie model meshes division unit type of the present invention uses SOLID45, and the grid of electric insulating tube is drawn
Subdivision type uses SHELL181.
2nd, mesh generation is carried out to the 3-D geometric model of establishment
Mesh generation mode generally has free and two kinds of map, selects different modes by the result of solution and computational accuracy production
Raw conclusive influence, because the planform of mesolow electrical accessorie of the present invention is uncomplicated, the present invention is using freely（free）
Grid division mode carries out mesh generation, and first carries out face division to electric insulating tube, and then to carry out body to L-type support frame draw
Point.
3rd, constraint is applied to the model for carrying out mesh generation
The present invention is constrained the boundary condition for applying 6 frees degree in the bottom entire surface of L-type support frame respectively.
Step 2：Analyze internal stress size and distribution of the low-voltage electrical apparatus accessory under vibratory impulse
Continuous impulsive force load is carried out to the entirety of low-voltage electrical apparatus accessory first, then checks that low-voltage electrical apparatus is matched somebody with somebody by post processing
Stress intensity and distribution situation caused by inside part, observe whether it has exceeded the limiting range of stress of respective material.
Fig. 2 is internal stress distribution figure of the described low-voltage electrical apparatus accessory under vibratory impulse, as seen from Figure 2：The bottom of positioned at
At two cylindrical support framves of seat and electric insulating tube traverses with existing 3 at stress distribution concentration at vertical tube intersection location.
Step 3：According to analysis result, the structure of low-voltage electrical apparatus accessory is optimized
It can be learnt according to the analysis result of step 2：Have that stress value caused by two is larger, wherein positioned at L-type support frame base
Stress Distribution value near two partial cylindrical support framves is more concentrated and its stress value is larger, and maximum alreadys exceed the carbon
The Steel material Q265 stress permissible value limit, illustrate that this is easily denatured under the conditions of being in vibratory impulse；In addition, electric insulating tube
Traverse with vertical tube in the opening position intersected, stress distribution is also more concentrated, and stress value is also larger, alreadys exceed epoxy resin
Limiting range of stress 90MPa, illustrate that this is under the conditions of vibratory impulse and crack conditions also easily occur.
There is above-mentioned analysis result, those skilled in the art just has to be set to the progress structure optimization of low-voltage electrical apparatus accessory
Count foundation.
It is visible in summary：Low-voltage electrical apparatus accessory provided by the invention is tested available for vibratory impulse actual effect simulation analysis,
By to the low-voltage electrical apparatus accessory carry out vibratory impulse actual effect simulation analysis, can be low-voltage electrical apparatus accessory in vibratory impulse situation
Under avoid actual effect carry out structure optimization with design provide foundation, have research application value.
Finally it is necessarily pointed out that, described above is served only for making further specifically technical scheme
It is bright, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art makes according to the above of the present invention
Some nonessential modifications and adaptations belong to protection scope of the present invention.
Claims (5)
- A kind of 1. low-voltage electrical apparatus accessory, it is characterised in that：Including low-voltage electrical apparatus support frame and for low-voltage electrical apparatus and external circuitses Three electric insulating tubes for connecting and being insulated with extraneous phase.
- 2. low-voltage electrical apparatus accessory as claimed in claim 1, it is characterised in that：The cross sectional shape of described low-voltage electrical apparatus support frame For L-type.
- 3. low-voltage electrical apparatus accessory as claimed in claim 1 or 2, it is characterised in that：Described low-voltage electrical apparatus support frame uses carbon Steel is made.
- 4. low-voltage electrical apparatus accessory as claimed in claim 1, it is characterised in that：Described electric insulating tube is by two hollow cylinders Orthogonal formation.
- 5. the low-voltage electrical apparatus accessory as described in claim 1 or 4, it is characterised in that：Described electric insulating tube uses epoxy resin It is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610592990.1A CN107658161A (en) | 2016-07-26 | 2016-07-26 | A kind of low-voltage electrical apparatus accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610592990.1A CN107658161A (en) | 2016-07-26 | 2016-07-26 | A kind of low-voltage electrical apparatus accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107658161A true CN107658161A (en) | 2018-02-02 |
Family
ID=61127213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610592990.1A Pending CN107658161A (en) | 2016-07-26 | 2016-07-26 | A kind of low-voltage electrical apparatus accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107658161A (en) |
-
2016
- 2016-07-26 CN CN201610592990.1A patent/CN107658161A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180202 |
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| WD01 | Invention patent application deemed withdrawn after publication |