CN104122200B - Dust friction pair structure and use the vacuum dust friction wear testing machine of this structure - Google Patents
Dust friction pair structure and use the vacuum dust friction wear testing machine of this structure Download PDFInfo
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- CN104122200B CN104122200B CN201310145514.1A CN201310145514A CN104122200B CN 104122200 B CN104122200 B CN 104122200B CN 201310145514 A CN201310145514 A CN 201310145514A CN 104122200 B CN104122200 B CN 104122200B
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- 239000000428 dust Substances 0.000 title claims abstract description 95
- 238000011068 load Methods 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000875 corresponding Effects 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000001050 lubricating Effects 0.000 claims description 3
- 238000010192 crystallographic characterization Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 1
- 239000012466 permeate Substances 0.000 claims 1
- 235000013312 flour Nutrition 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 description 7
- 238000011160 research Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005070 sampling Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
- 101710031899 moon Proteins 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241001061260 Emmelichthys struhsakeri Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 231100000078 corrosive Toxicity 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000003137 locomotive Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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- 238000007363 ring formation reaction Methods 0.000 description 1
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Abstract
The dust friction wear testing machine with this structure under the invention discloses a kind of dust friction pair structure and being used in vacuum environment.This structure includes test specimen, lower test specimen test specimen inner position ring, lower test specimen outer positioning ring, sample bench base etc..The screw that inner position ring is arranged in relying on interior grooves is fixed on sample bench base, hole, location it is provided with on outer positioning ring, the hole pin being carried out both by the alignment pin being correspondingly arranged on sample bench base is connected, lower test specimen is torus, fix and be fastened between interior outer positioning ring, upper test specimen is mechanically fixed on the loading axle of fretting wear machine, the annulus of upper test specimen is in close contact with the annulus of lower test specimen, and be in the groove that lower test specimen two locating ring is formed, two annulus contact portions are provided with dust.The structure of the present invention uses ring block to mill mode, it is ensured that in process of the test, dust remains between two pairs of flour millings, uses the friction test function of this structure to make testing machine separate with vacuum system, occupies little space, convenient, flexible and with low cost.
Description
Technical field
The invention belongs to space material technical field of performance test, being specifically related to a kind of research material equipment of friction and wear behavior under vacuum dust atmosphere, this equipment is widely used in the space dirt environment Study on Friction Properties to movable device parts such as floor-dust, moon dirt, Mars dirt.
Background technology
Vacuum frictional testing machine is used to test material or mechanism frictional behaviour under vacuum conditions and the test platform of military service characteristic, is one of important index evaluating spacecraft service reliability.The accident causing space mechanism to lose efficacy due to friction happens occasionally in the space exploration of various countries.Although various countries technical staff has been designed that multiple frictional testing machine at present, to meet the needs of all kinds of space motion mechanism friction test.But, along with space exploration field is more and more extensive, there is larger change in the friction environment residing for various space motion mechanisms, as various countries fell over each other the moon exploration program carried out in the last few years, the sixty-four dollar question run into is exactly lunar dust environment.And vacuum frictional testing machine of the prior art can not meet the abrasion research requirement under vacuum lunar dust granule the most completely.U.S. Apollo lunar exploration example is it has proven convenient that the spacecrafts such as lunar rover can be caused serious wear condition by lunar dust environment, and traditional vacuum frictional testing machine cannot tackle the research to material polishing machine of this grit environment.
Along with the development of China's aerospace industry, China scientific worker, for research material friction and wear behavior under vacuo, has been developed for the frictional testing machine of many moneys vacuum environment.Such as, the vacuum frictional testing machine of the design such as the Zeng Qunfeng of Xi'an Communications University can be implemented in the friction test under the conditions of vacuum and different atmosphere, use oil-free scroll molecular pump system, it is to avoid the vacuum oil interference (seeing Chinese patent CN102621060A) to test；The multifunctional vacuum frictional testing machine of the design such as armored force engineering institute Wang Hai bucket, can obtain 10-6Pa vacuum within a short period of time, and can extend to radiation and corrosive environment measurement (CN102759489)；The similar testing machine that can realize vacuum friction test also includes the YS-1 type vacuum frictional testing machine of the developments such as Harbin Institute of Technology's Song's precious jade, the vacuum frictional testing machine (CN101393113A) of the design such as Harbin Institute of Technology Li Guang, the cryogenic vacuum frictional testing machine (201034897Y) etc. of Zhang Guozhen's design.
Above-mentioned vacuum frictional testing machine of the prior art, although can realize vacuum friction-wear test, and functionally have certain expansion in other side, but it is custom-designed for vacuum dust atmosphere for not having one.Vacuum dust atmosphere friction test is different with other type of vacuum test, has the technology requirement that it is special, including: in the applying of dust, the protection of dust pollution and process of the test, dust can not depart from flour milling etc..Therefore have to carry out dedicated experiments machine design for dust atmosphere, the present invention is aiming at this situation, has invented a kind of friction pair structure being applicable under vacuum, dust granules environment and has included the vacuum dust friction wear testing machine of this friction pair structure.
Summary of the invention
In order to overcome technical problem present in above-mentioned prior art, the present inventor is through studying for a long period of time, a kind of friction pair structure being applicable to vacuum dust atmosphere is proposed, utilize this friction pair structure to construct a kind of frictional testing machine, it is possible to realize the different materials friction-wear test research at vacuum dust atmosphere simultaneously.
Present invention employs following technical scheme:
A kind of dust friction pair structure, including upper test specimen, sample bench base, inner position ring, lower test specimen, outer positioning ring, the screw that inner position ring is arranged in relying on interior grooves is fixed on sample bench base, hole, location it is provided with on outer positioning ring, the hole pin being carried out both by the alignment pin being correspondingly arranged on sample bench base is connected, lower test specimen is torus, fix and be fastened between interior outer positioning ring, upper test specimen is the torus with end cap, end cap central is porose, screw perforation is used to be affixed directly on the loading axle of fretting wear machine, the annulus of the upper test specimen after Gu Ding is in close contact with the annulus of lower test specimen, and it is in lower test specimen inner position ring, in the groove formed between outer positioning ring, have among described two annulus close contact portion and pre-set or by dust passage hole infiltration dust therebetween.
Wherein, the space that after the annulus of upper test specimen contacts with the annulus of lower test specimen, two rings are internally formed be enough to accommodate the volume of inner position ring.
Wherein, hole, location is two or more with the quantity of alignment pin.
Wherein, upper test specimen and lower test specimen are made up of friction test material respectively.
Wherein, inner position ring, outer positioning ring limit the motion of dust among described two annulus close contact portion jointly, it is ensured that in process of the test, dust is present between upper and lower test specimen all the time.
nullA kind of vacuum dust friction wear testing machine with above-mentioned dust friction pair structure，Including above-mentioned dust friction pair structure (i.e. sample bench)、Dewar vessel (or claiming vacuum chamber)、The loading system loaded for test specimen、Data collection and control system、Electric magnet lifting sample bench and electric system，The sample bench base of described dust friction pair structure is fixed on machine shaft，The upper test specimen of described dust friction pair structure be fixed on the loading axle of loading system with by loading system to upper test specimen imposed load，Sample bench base is connected with the motor shaft of electric system and is rotated by driven by motor，Lower test specimen is driven to rotate again，Upper and lower test specimen is carried out to mill during there is dust between upper and lower test specimen，Wherein，Described dust friction pair structure、Loading system、Electric magnet lifting platform and electric system are arranged in Dewar vessel，Data collection and control system is arranged on Dewar vessel (i.e. vacuum chamber) outward and respectively to loading system、Electric magnet lifting platform and electric system carry out each test parameters of vacuum powder friction-wear test and control，Gather the frictional wear amount characterization parameter that upper and lower test specimen is corresponding under each test parameters simultaneously.
Wherein, electric system is isolated with Dewar vessel (vacuum chamber) by sealing shell, and motor shaft uses magnet fluid sealing, the closed cycle in motor of motor lubricating system, produces and pollute in will not evaporating into Dewar vessel.
Wherein, loading system uses counterweight to load, and loads axle and holds fixing by four precision linear axis, and horizontal direction will not be moved.
Wherein, loading axle can be freely-movable in vertical direction, by loading the loading adding counterweight realization on axle to test specimen.
Wherein, loading axle and be connected with counterweight by lever, the moment that counterweight produces and the moment loading axle generation are cancelled out each other, and load the quality placing counterweight on axle equal to the vertical load applying friction pair.
Wherein, the hole of certain diameter is left at loading axle and counterweight center, so that dust is by between friction pair.
Wherein, the height of electric magnet lifting platform can be adjusted according to the height loading counterweight, electric magnet is consistently higher than counterweight 1mm, the adhesive when system (whole Dewar vessel) evacuation of electric magnet lifting platform, will load axle and promote 1mm, and make upper and lower test specimen separate, to allow dust to enter rubbing surface between upper and lower test specimen, and after system (whole Dewar vessel) vacuum reaches setting value, electric magnet release adds counterweight and loads, and makes upper and lower test specimen contact.
Wherein, when overload occurs in system, data collection and control system can make electromagnetic actuation, so that test specimen separates up and down, protects motor.
Relative to vacuum frictional testing machine of the prior art, main advantages of the present invention are:
1) the form design cyclization of friction pair--block is to mill formula, by the upper and lower testpieces of appropriate design and positioner, defines one to mill groove, it can be ensured that in process of the test, dust remains between two pairs of flour millings.Thus solve the problem that other style vacuum frictional testing machine cannot be carried out dust granules friction research.
2) special design has been carried out for dust test condition, by loading the structures such as axle, testing stand, electric magnet lifting platform and isolation cover, can ensure that the addition of dust, avoid dust granules in vacuum to disperse everywhere, on the one hand cause the pollution to vacuum system, on the other hand cannot be normally carried out test owing to losing dust granules between friction pair.This design is also the condition that other vacuum frictional testing machine does not possesses.
3) frictional testing machine and vacuum system are separate, and testing stand can be placed in any Dewar vessel, it is not necessary to time can be individually placed, occupy little space, convenient, flexible.Owing to need not special vacuum-pumping system, greatly reduce testing machine cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the dust friction pair structure of the present invention；
Wherein, 1 for loading axle；2 is dust granules；3 is sample bench base；4 is alignment pin；5 is lower test specimen；6 is lower test specimen inner position ring；7 is lower test specimen outer positioning ring；8 is upper test specimen；9 is fixing screw.
Fig. 2 is the structural representation of the vacuum dust friction wear testing machine with above-mentioned dust friction pair structure of the present invention；
Wherein, 21 is Dewar vessel；22 is sampling computer；23 is the control system of vacuum dust friction wear testing machine；The base that 24 is abrasion machine；25 is electric system；26 is friction pair sample bench；27 is loading system；28 is electric magnet lifting platform；29 is coefficient of friction acquisition system；30 is speed measuring system.
Detailed description of the invention
To the dust friction pair structure of the present invention and the vacuum dust friction wear testing machine of above-mentioned dust friction pair structure is used to be described in detail below in conjunction with accompanying drawing, the purpose that detailed description of the invention is merely illustrative, it is no intended to limit the scope of the invention.
See the schematic diagram that Fig. 1, Fig. 1 show the dust friction pair structure of the present invention.Wherein, the dust friction pair structure of an embodiment of the present invention, including sample bench base 3, alignment pin 4, lower test specimen 5, lower test specimen inner position ring 6, lower test specimen outer positioning ring 7, upper test specimen 8 etc..Inner position ring 6 offers interior grooves, by using screw 9 to be fixed on testing stand base 3 by inner position ring 6 in interior grooves, hole, location it is provided with on bottom outer positioning ring 7, location hole number is preferably 2, the hole, location arranged on corresponding outer positioning ring 7 on the upper surface of testing stand base 3 is provided with alignment pin, being coordinated by the hole pin between hole, location and alignment pin and be connected on testing stand base 3 by outer positioning ring 7, pin-and-hole fit structure is conducive to being replaced the various test specimens being made up of friction test material.Lower test specimen 5 is torus structure, fixes and is fastened between inner position ring 6 and outer positioning ring 7, and the height of inner position ring 6 and outer positioning ring 7, higher than the height of lower test specimen 5, the ring part of following test specimen 5 forms groove.Upper test specimen 8 is the torus with end cap, end cap central is porose, can be affixed directly on the loading axle of fretting wear machine through this centre bore by screw, the annulus of the upper test specimen after Gu Ding is in close contact with the annulus of lower test specimen, and be between lower test specimen inner position ring 6, outer positioning ring 7 in the groove formed, inner position ring 6, outer positioning ring 7 limit the motion of dust 2 among described two annulus close contact portion jointly, it is ensured that in process of the test, dust is present between upper and lower test specimen all the time.The space that after having dust, the annulus of upper test specimen to contact with the annulus of lower test specimen among two annulus close contact portion, two rings are internally formed be enough to accommodate the volume of inner position ring 6, namely the height of inner position ring will be less than the medial surface of upper test specimen end cap.
In one embodiment, dust is set in advance in the contact portion between two test specimens.
In another embodiment, the dust between two annulus close contact portion is permeated therebetween by dust passage hole.
Fig. 2 is shown in by the vacuum dust friction wear testing machine schematic diagram that the present invention provides, and this vacuum dust friction wear testing machine includes: Dewar vessel 21(i.e. vacuum chamber), Dewar vessel 21 accommodates each parts in inside of friction wear testing machine and independent of one another with them.Abrasion machine base 24, electric system 25, friction pair sample bench 26, loading system 27, electric magnet lifting platform 28, coefficient of friction acquisition system 29 and speed measuring system 30 for loaded load are placed in inside Dewar vessel, sampling computer 22 and the control system 23 of friction wear testing machine are placed in outside Dewar vessel, but all being carried out telecommunication by electric connection line with each parts within Dewar vessel and each parts are carried out electric control, the mode of these control modes friction wear testing machine all each with prior art with connected mode is identical.Wherein, for example, electric system in this system is identical with electric system well known in the prior art, mainly include with lower component: intermediate frequency high-speed electric expreess locomotive, variable frequency drives, water cooled housing and sylphon seal, motor is isolated with vacuum chamber by sealing shell, motor shaft uses magnet fluid sealing, the closed cycle in motor of motor lubricating system, produces and pollute in will not evaporating into vacuum chamber.Closed circulating water system is connected with stainless steel cooling pipe on shell by sylphon seal, cools down motor.Motor is by sealing shell and isolation of system, and dust will not enter motor internal and motor is caused damage.Loading system in this system is identical with prior art, and wherein loading system uses counterweight to load, and loads axle and holds fixing by four precision linear axis, and horizontal direction will not be moved.Loading axle can be freely-movable in vertical direction, by loading the loading adding counterweight realization on axle to test specimen.Loading axle to be connected with counterweight by lever, the moment that counterweight produces and the moment loading axle generation are cancelled out each other, and load the quality placing counterweight on axle equal to the vertical load applying friction pair.The hole of certain diameter is left at loading axle and counterweight center, and dust can be applied between upper and lower test specimen by hole.Equally, electric magnet lifting platform, speed measuring system are also known technology, and wherein, electric magnet lifting platform height can be adjusted according to loading counterweight height, it is ensured that electric magnet is consistently higher than counterweight 1mm.The adhesive when system evacuation of electric magnet lifting platform, will load axle and promote 1mm, and make upper and lower test specimen separate, and on the one hand allow dust to enter rubbing surface between upper and lower test specimen, on the other hand dust can be allowed to be exposed in vacuum, be conducive to extracting powder surface adsorbed gas.After system vacuum reaches setting value, electric magnet release adds counterweight and loads, and makes upper and lower test specimen contact.When there is overload in system, electromagnetic actuation, make upper and lower test specimen separate, protect motor.
Wherein,
Speed measuring system in the present invention is made up of reflective photoelectric sensor and tachoscope, for measuring the relative rotation speed between upper and lower test specimen.And coefficient of friction acquisition system is made up of the data acquisition components of frictional force transmission lever, sensor and telecommunication, the collection of frictional force, data show in real time and record etc. all can complete by electric-controlled parts, and are shown by display device and record.
The improvement of the present invention is particularly in dust friction pair sample bench 26: this dust friction pair sample bench 26 is connected with the motor shaft of electric system 25, and by driven by motor, it rotates.Testpieces uses ring-block form secondary to mill.Mill test specimen is fixed by dust friction pair sample bench 26, wherein go up test specimen to be fixed on loading axle, lower test specimen is fixed on sample bench base, assembling structure is shown in Fig. 1, there is the seal retainer ring on the pressure ring of certain altitude and lower test specimen and jointly limit the motion of dust, it is ensured that in process of the test, dust is present between upper and lower test specimen all the time.
The vacuum dust friction wear testing machine using the present invention can be tested, specifically as follows:
1) testing machine is installed: become to formulate the test specimen of shape and size by the materials processing of pending friction test according to sample bench size.Testing machine is placed in the vacuum chamber that dimensional space is enough, cross wall plug by vacuum data collecting card, motor power to be connected with transformator outfan on computer, switch board respectively, recirculated cooling water is closed and is connected with the stainless steel tube being welded on motor seal shell by sealed interface, is isolated with vacuum chamber by circulating cooling water pipe by flange and corrugated tube.Installing water flow relay monitoring recirculated water on CWR to run, if recirculated water does not works, water flow relay contact disconnects, and switch board power supply disconnects, and system-down, hydropenia display lamp is bright.Motor temperature uses galvanic couple monitoring, shows motor temperature in real time with temperature controller, and after motor temperature is more than 80 DEG C, temperature controller contact disconnects, and system-down, excess temperature display lamp is bright.Power of motor is 1.5kW, and corresponding output moment of torsion is 1.5Nm, and after frictional torque exceedes rated power, converter output is cut off, and overload light is bright.
2) test procedure: test specimen is installed on sample bench, the counterweight identical in quality with EXPERIMENTAL DESIGN loaded load is installed on loading axle, adjust electric magnet height, electric magnet is made to be higher than counterweight 1mm, move switch board electro-magnet control switch to " adhesive " position, electric magnet picks up counterweight, and upper and lower test specimen separates, and is placed between upper and lower test specimen by dust granules.Closing door for vacuum chamber, start vacuum system, after system vacuum reaches back end vacuum, broken by electro-magnet control switch to " release " position, electromagnet power supply disconnects, and discharges counterweight, completes to load.Recall data sampling program on computer, click on " test " menu, click on " adopting in advance " button, system acquisition 0. 30 seconds, after adopting end in advance, adjusts frequency converter frequency control handle, driving frequency is modulated EXPERIMENTAL DESIGN value, driving electric machine rotation, driving frequency is 1Hz=60rpm with the corresponding relation of motor speed, and frequency of drives control accuracy is 0.1Hz.Click program START button, program starts sampling, and shows coefficient of friction in real time, after predetermined test period to be achieved, clicks on " end " button, and sampling terminates.Close converter power supply, motor stopping by switch board, close main power.
Although above the detailed description of the invention of the present invention being described in detail and illustrates, but it should be noted that, above-mentioned embodiment can be made various changes and modifications by we, but these are without departure from the scope described in the spirit of the present invention and appended claim.
Claims (11)
1. a dust friction pair structure, including upper test specimen, sample bench base, inner position ring, lower test specimen, outer positioning ring,
The screw that inner position ring is arranged in relying on interior grooves is fixed on sample bench base, and outer positioning ring is provided with location
Hole, the hole pin being carried out both by the alignment pin being correspondingly arranged on sample bench base is connected, and lower test specimen is annulus
Body, fixes and is fastened between interior outer positioning ring, and upper test specimen is the torus with end cap, and end cap central is porose, adopts
It is affixed directly on the loading axle of fretting wear machine with screw perforation, the annulus of the upper test specimen after fixing and lower test specimen
Annulus is in close contact, and is between inner position ring, outer positioning ring in the groove formed, and described two annulus closely connect
Contact portion has in dividing and pre-sets or permeate dust therebetween by access opening.
2. dust friction pair structure as claimed in claim 1, wherein, the annulus of upper test specimen contacts with the annulus of lower test specimen
The space that rear two rings are internally formed be enough to accommodate the volume of inner position ring.
3. dust friction pair structure as claimed in claim 1, wherein, hole, location is two or two with the quantity of alignment pin
More than individual.
4. the dust friction pair structure as described in any one of claim 1-3, wherein, upper test specimen and lower test specimen are respectively by rubbing
Wiping test material is made.
5. the dust friction pair structure as described in any one of claim 1-3, wherein, inner position ring, outer positioning ring are common
Limit the motion of dust among described two annulus close contact portion, it is ensured that in process of the test, dust is present in all the time
Between lower test specimen.
6. there is a vacuum dust friction wear testing machine for dust friction pair structure described in any one of claim 1-5,
Including above-mentioned dust friction pair structure, the loading system for test specimen loading, data collection and control system, electromagnetism
Ferrum lifting platform and electric system, Dewar vessel, the sample bench base of described dust friction pair structure are fixed on motor and turn
On axle, the upper test specimen of described dust friction pair structure is fixed on the loading axle of loading system, and lower test specimen is fixed on examination
On sample platform base, sample bench base is connected with the motor shaft of electric system and is rotated by driven by motor, then drives lower examination
Part rotates, and carries out upper and lower test specimen to mill during there is dust between upper and lower test specimen, wherein, and described dust friction pair
Structure, loading system, electric magnet lifting platform and electric system are arranged in Dewar vessel, data collection and control system
System is arranged on outside Dewar vessel and respectively loading system, electric magnet lifting platform and electric system is carried out vacuum dust and rubs
The each test parameters wiping wear test controls, and gathers the fretting wear that upper and lower test specimen is corresponding under each test parameters simultaneously
Amount characterization parameter.
7. vacuum dust friction wear testing machine as claimed in claim 6, wherein, electric system by seal shell with
Dewar vessel is isolated, and motor shaft uses magnet fluid sealing, the closed cycle in motor of motor lubricating system, Bu Huihui
Produce in sending to Dewar vessel and pollute.
8. vacuum dust friction wear testing machine as claimed in claim 6, wherein, loading system uses counterweight to load,
Loading axle and hold fixing by four precision linear axis, horizontal direction will not be moved；Loading axle can in vertical direction
Free motion, by loading the loading adding counterweight realization on axle to test specimen.
9. vacuum dust friction wear testing machine as claimed in claim 8, wherein, loads axle by lever and counterweight phase
Even, moment and the moment of loading axle generation that counterweight produces are cancelled out each other, and the quality that loading axle is placed counterweight is equal to
The vertical load that friction pair is applied.
10. vacuum dust friction wear testing machine as claimed in claim 9, wherein, loads axle and counterweight center leaves one
Determining the hole of diameter, dust can be added between friction pair by hole.
The 11. vacuum dust friction wear testing machines as described in any one of claim 6-10, wherein, electric magnet lifting platform
Height can according to load counterweight height be adjusted, electric magnet is consistently higher than counterweight 1mm, and electric magnet lifting platform exists
System, to adhesive during evacuating atmosphere in vacuum vessel, will load axle and promote 1mm, and make upper and lower test specimen separate, to allow dust to enter
Enter rubbing surface between upper and lower test specimen, and after vacuum reaches setting value in Dewar vessel, electric magnet release adds counterweight and adds
Carry, make upper and lower test specimen contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145514.1A CN104122200B (en) | 2013-04-24 | Dust friction pair structure and use the vacuum dust friction wear testing machine of this structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145514.1A CN104122200B (en) | 2013-04-24 | Dust friction pair structure and use the vacuum dust friction wear testing machine of this structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104122200A CN104122200A (en) | 2014-10-29 |
| CN104122200B true CN104122200B (en) | 2016-11-30 |
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