CN105259063A - Current-carrying friction single-contact-peak arc testing machine - Google Patents
Current-carrying friction single-contact-peak arc testing machine Download PDFInfo
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- CN105259063A CN105259063A CN201510642038.3A CN201510642038A CN105259063A CN 105259063 A CN105259063 A CN 105259063A CN 201510642038 A CN201510642038 A CN 201510642038A CN 105259063 A CN105259063 A CN 105259063A
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Abstract
The invention relates to a current-carrying friction single-contact-peak arc testing machine which comprises a machine frame. A sample clamp for clamping a sample is arranged on the machine frame. An electrode which is opposite to the sample clamp in a spaced mode, is used for performing loading and top pressure on the sample and moves relative to the sample so as to form a current-carrying friction pair with the sample is further arranged on the machine frame. The end, facing towards the sample clamp, of the electrode is of a tip structure making point contact with the sample. When the tip structure of the electrode makes top pressure contact with the sample, electric contact will be formed and then single-peak contact can be formed, existing mutual interference of contact among multiple peaks on arc characteristics is overcome, the influence caused by resistance heat and friction heat brought by multi-peak coupling to the current-carrying friction pair wear resistance can be effectively lowered, and the research for the wear resistance of the current-carrying friction pair is achieved only for arc heat.
Description
Technical field
The present invention relates to a kind of current-carrying friction single contact peak arc test machine.
Background technology
Current-carrier friction pairs occurs causing electric arc when being separated in the course of the work.The particularly current-carrier friction pairs such as high-voltage switch gear and high-speed railway bow net, under high-speed overload and big current service condition, the damage that electric arc causes is day by day serious.So the formation mechenism of electric arc and damage mechanisms research are basic theory problems expecting to solve.
At present, current-carrying frictional testing machine is adopted to carry out current-carrying friction test, if Authorization Notice No. is the testing machine of the current-carrying frictional wear disclosed in the Chinese utility model patent of CN202421000U, comprise and rotate assembling current-carrying frictional wear dish on the table and the loaded type pin card fixture being arranged in current-carrying frictional wear dish side, on loaded type pin card fixture, the sample of clamping is positioned at the side of fricting working surface on current-carrying frictional wear dish.During use, be loaded on current-carrying frictional wear dish by loaded type pin card fixture by sample, current-carrying frictional wear dish rotates, and carries out current-carrying friction test.
But two faces of the friction in existing this current-carrying frictional testing machine are face contact, conduction fricting movement pair for two face contacts has carried out a large amount of arc characteristic research, but due to the multimodal contact performance of rubbing surface, therefore, the arc characteristic of research is all results of coplanar multimodal coupled in common, current-carrier friction pairs polishing machine can not be subject to the impact of arc heat, is also subject to resistance heat, the affecting more by force of heat of friction, accurately cannot tests the impact of arc heat on current-carrier friction pairs polishing machine.Simultaneously due to surface in contact contact with each other time, many arc phenomenons cannot directly be observed.Therefore, study the germinating of electric arc, development and extinguishing process further and become a technical barrier.
The research contents mainly research to current-carrying frictional wear performance such as electric factor, load and speed at present to current-carrier friction pairs, and the micromechanism of damage that forming process and the electric arc of current-carrying electric arc cause is not furtherd investigate.Quality research of conducting electricity between current-carrier friction pairs at present in addition to be conducted electricity to current-carrier friction pairs Contact and electric arc conducts electricity comprehensive current-carrying matter quantifier elimination, and contact conduction is completely different with quality of conducting electricity from the conductive mechanism that electric arc conducts electricity, and the proposition of noncontact electrically conducting manner in recent years will be the emphasis of current-carrying friction research for electric arc conduction product Quality Research and control thereof.Current testing machine does not possess these functions.
Summary of the invention
The invention provides a kind of current-carrying friction single contact peak arc test machine, having during to solve current-carrying frictional testing machine of the prior art test that coplanar multimodal coupled in common causes cannot the technical matters that affects current-carrier friction pairs polishing machine of Measurement accuracy arc heat.
The technical scheme of current-carrying friction provided by the present invention single contact peak arc test machine is: a kind of current-carrying friction single contact peak arc test machine, comprise frame, frame is provided with the specimen holder for clamping sample, frame is also provided with arrange with described specimen holder relative spacing be pressed on sample for loading to push up and there is relative motion to form the electrode of current-carrier friction pairs with described sample with sample, one end towards described specimen holder of described electrode is for forming the cutting-edge structure of point cantact with described sample.
Described electrode and specimen holder along the vertical direction relative spacing are arranged, described electrode and one of them in specimen holder bear the load driver power extended along the vertical direction that charger that described frame is provided with applies, another straight line driving mechanism be provided with by frame drives and can carry out moving linearly to form described current-carrier friction pairs in the surface level vertical with described above-below direction.
Described charger applies load driver power to described electrode, and charger comprises for driving described electrode lifting action and the lift drive mechanism controlling described electrode and sample contacts, disengaging along the vertical direction.
Described lift drive mechanism comprises the support that can carry out lifting action along the vertical direction, and support is provided with terminal clamp by loading force sensor, and what described electrode pair was answered is installed in described terminal clamp.
Described lift drive mechanism comprise be installed in drive motor in frame and along the vertical direction guiding movement be assemblied in the lifting slide unit that can be driven lifting by described drive motor in described frame, described support is installed on described lifting slide unit.
Described specimen holder is driven by described straight line driving mechanism and moves linearly at the surface level vertical with above-below direction, in described frame, guiding movement is equipped with Mobile Slide in the horizontal direction, described specimen holder is installed on described Mobile Slide, and described straight line driving mechanism drives described specimen holder to move linearly in surface level by driving Mobile Slide
The invention has the beneficial effects as follows: current-carrying friction provided by the present invention single contact peak arc test machine in use, by specimen clamping on specimen holder, load top by the electrode that frame is arranged with specimen holder relative spacing to be pressed on sample and with sample generation relative motion to form current-carrier friction pairs with sample, one end towards specimen holder due to electrode is cutting-edge structure, the cutting-edge structure of electrode with during the press contacts of sample top by formation electrical contact and then unimodal contact can be formed, overcome the mutual interference of Contact to arc characteristic of existing multimodal, can effectively reduce because multimodal is coupled the resistance heat brought, heat of friction is on the impact of current-carrier friction pairs polishing machine, realize only arc heat to the research of current-carrier friction pairs polishing machine, and, electrode and sample form point cantact, the formation of single electric arc and the research of burning principle can also be carried out.
Further, in electrode and specimen holder, one applies load driver power by charger, another is respectively driven by straight line driving mechanism and moves linearly in surface level, the Regional Gravity multiple connection on electrode and sample effectively can be avoided like this to touch and form electric arc and accumulate, affect analogue measurement result.
Further, charger is lift drive mechanism, the dynamic change of electric arc when can be convenient to during the lifting of lift drive mechanism drive electrode observe electrode and sample contacts and depart from.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of current-carrying provided by the present invention friction single contact peak arc test machine.
Embodiment
As shown in Figure 1, the embodiment of a kind of current-carrying friction single contact peak arc test machine, testing machine in this embodiment comprises frame 100, frame 100 is provided with the specimen holder 11 for clamping sample 10, specimen holder 11 herein specifically sets firmly on the Mobile Slide 12 that is installed in and can does to move linearly in the surface level vertical with above-below direction, and Mobile Slide 12 is driven by straight line driving mechanism and moves linearly.
Frame 100 is also provided with arrange with specimen holder 11 relative spacing along the vertical direction be pressed on sample 10 for loading to push up and relative motion occur to form the electrode 8 of current-carrier friction pairs with sample 10 with sample 10, one end towards specimen holder 11 of electrode 8 is for forming the cutting-edge structure of point cantact with sample 10.
In the present embodiment, electrode 8 and specimen holder 11 along the vertical direction relative spacing are arranged, electrode bears the load driver power extended along the vertical direction that charger that described frame is provided with applies, and the straight line driving mechanism that specimen holder 11 is then provided with by frame drives and can carry out moving linearly to form described current-carrier friction pairs in the surface level vertical with described above-below direction.
Charger specifically comprises for drive electrode 8 lift drive mechanism that changes of lifting action and control electrode and sample contacts, disengaging and load driver power along the vertical direction, lift drive mechanism comprises the support 4 that can carry out lifting action along the vertical direction, and support 4 is provided with loading force sensor 5, support set 6 and terminal clamp 7.Electrode 8 is installed on terminal clamp 7 by gib screw 9, terminal clamp 7 is then arranged on support 4 by support set 6, loading force sensor 5, support 4 is fixedly installed on lifting slide unit 3, then being elevated 3, slide unit is assemblied in frame 100 by riser guide 2 guiding movement extended along the vertical direction, and lifting slide unit 3 is driven by drive motor 1 and carries out lifting action.
During use, be fixed on specimen holder 11 by sample 10 clamping, make motor be pressed on sample 10 with the load top of setting by adjustment loading force sensor 5, now, electric current passes through between electrode 8 and sample 10.In traditional experiment process, electrode 8 maintains static, sample 10 is processed into the surface in contact of needs, and in the testing machine provided at the present embodiment, vertical motion is done in the vertical direction with electrode 8 by lifting slide unit 3, simultaneously, in surface level, linear translation is made with specimen holder 11 grades of samples 10 by Mobile Slide 12, the movement velocity of control electrode 8 and sample 10 and direction, thus the relative motion of control electrode 8 and sample 10, both cooperatively interact and realize the movement locus of current-carrier friction pairs part needs.
In the present embodiment, the corresponding end of electrode is designed to cutting-edge structure, this cutting-edge structure is when with sample current-carrying rubbing contact, resistance heat, heat of friction can be reduced on the impact of current-carrier friction pairs polishing machine, realize only by the research of arc heat to current-carrier friction pairs polishing machine, and electrode and sample form point cantact, the formation of single electric arc and the research of burning principle can also be carried out.
During concrete use, the geometry physical characteristics of contact point can also be changed by the cutting-edge structure and dissimilar sample selecting different size, extend the research to single arc characteristic.
In the present embodiment, the loading acting force on sample is applied to by adjustment loading force sensor adjustment electrode, and be elevated by lift drive mechanism drive electrode, be convenient to researchist and observe electrode contact and dynamic change when departing from, in other embodiments, also can save lift drive mechanism, and only be undertaken loading by general charger.
In the present embodiment, specimen holder is driven to carry out linear translation with sample by direct acting driving mechanism, the problem of the electric arc accumulation brought when avoiding like this occurring that sample rotates.Certainly, in other embodiments, sample can be driven by rotating drive mechanism and realize the relative motion with electrode, it should be noted that the rotation precision now needing Control Assay, avoids the problem occurring that electric arc is accumulated.
In the present embodiment, apply load driver power by charger to electrode, and drive specimen holder to make linear translation in surface level by direct acting driving mechanism.Also can apply load driver power by charger to specimen holder, and make linear translation by linear translation mechanism drive electrode, electrode and sample relative motion can be realized equally to form current-carrier friction pairs.
Claims (6)
1. current-carrying friction single contact peak arc test machine, comprise frame, frame is provided with the specimen holder for clamping sample, frame is also provided with arrange with described specimen holder relative spacing be pressed on sample for loading to push up and there is relative motion to form the electrode of current-carrier friction pairs with described sample with sample, it is characterized in that: one end towards described specimen holder of described electrode is for forming the cutting-edge structure of point cantact with described sample.
2. current-carrying friction according to claim 1 single contact peak arc test machine, it is characterized in that: described electrode and specimen holder along the vertical direction relative spacing are arranged, described electrode and one of them in specimen holder bear the load driver power extended along the vertical direction that charger that described frame is provided with applies, another straight line driving mechanism be provided with by frame drives and can carry out moving linearly to form described current-carrier friction pairs in the surface level vertical with described above-below direction.
3. current-carrying friction according to claim 2 single contact peak arc test machine, it is characterized in that: described charger applies load driver power to described electrode, charger comprises for driving described electrode lifting action and the lift drive mechanism controlling described electrode and sample contacts, disengaging along the vertical direction.
4. current-carrying friction according to claim 3 single contact peak arc test machine, it is characterized in that: described lift drive mechanism comprises the support that can carry out lifting action along the vertical direction, support is provided with terminal clamp by loading force sensor, and what described electrode pair was answered is installed in described terminal clamp.
5. current-carrying friction according to claim 4 single contact peak arc test machine, it is characterized in that: described lift drive mechanism comprise be installed in drive motor in frame and along the vertical direction guiding movement be assemblied in the lifting slide unit that can be driven lifting by described drive motor in described frame, described support is installed on described lifting slide unit.
6. the current-carrying friction single contact peak arc test machine according to claim 3 or 4 or 5, it is characterized in that: described specimen holder is driven by described straight line driving mechanism and moves linearly at the surface level vertical with above-below direction, in described frame, guiding movement is equipped with Mobile Slide in the horizontal direction, described specimen holder is installed on described Mobile Slide, and described straight line driving mechanism drives described specimen holder to move linearly in surface level by driving Mobile Slide.
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| CN201510642038.3A CN105259063B (en) | 2015-09-30 | 2015-09-30 | A kind of single contact peak arc test machine of current-carrying friction |
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| CN201510642038.3A CN105259063B (en) | 2015-09-30 | 2015-09-30 | A kind of single contact peak arc test machine of current-carrying friction |
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| CN105259063B CN105259063B (en) | 2018-12-11 |
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Cited By (7)
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| CN105738237A (en) * | 2016-05-06 | 2016-07-06 | 洛阳理工学院 | Horizontal type current-carrying friction arc tester |
| CN110095371A (en) * | 2019-05-28 | 2019-08-06 | 西南交通大学 | Current-carrying frictional wear experiment device and its operating method |
| CN110987700A (en) * | 2019-12-10 | 2020-04-10 | 燕山大学 | Friction experimental device |
| CN112730596A (en) * | 2020-12-22 | 2021-04-30 | 河南科技大学 | System and method for testing surface force-heat-electricity load distribution of current-carrying friction micro-area |
| CN112881223A (en) * | 2021-01-18 | 2021-06-01 | 中国人民解放军海军工程大学 | Sliding contact and frictional wear characteristic test platform for electromagnetic rail transmitter |
| CN113533438A (en) * | 2021-07-26 | 2021-10-22 | 中国科学院宁波材料技术与工程研究所 | In-situ testing device and method for friction arc burning loss of electric contact material |
| WO2024016636A1 (en) * | 2022-07-22 | 2024-01-25 | 江苏科技大学 | High-speed high-current sliding current-carrying friction wear testing machine and testing method |
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| CN112730596B (en) * | 2020-12-22 | 2024-03-26 | 河南科技大学 | Current-carrying friction micro-region surface layer force-heat-electric load distribution test system and method |
| CN112881223A (en) * | 2021-01-18 | 2021-06-01 | 中国人民解放军海军工程大学 | Sliding contact and frictional wear characteristic test platform for electromagnetic rail transmitter |
| CN113533438A (en) * | 2021-07-26 | 2021-10-22 | 中国科学院宁波材料技术与工程研究所 | In-situ testing device and method for friction arc burning loss of electric contact material |
| CN113533438B (en) * | 2021-07-26 | 2024-04-09 | 中国科学院宁波材料技术与工程研究所 | In-situ testing device and method for friction arc burning loss of electric contact material |
| WO2024016636A1 (en) * | 2022-07-22 | 2024-01-25 | 江苏科技大学 | High-speed high-current sliding current-carrying friction wear testing machine and testing method |
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