CN202501982U - Thin-film lubrication for high speed friction pair and heat transfer test system - Google Patents
Thin-film lubrication for high speed friction pair and heat transfer test system Download PDFInfo
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- CN202501982U CN202501982U CN2012200914733U CN201220091473U CN202501982U CN 202501982 U CN202501982 U CN 202501982U CN 2012200914733 U CN2012200914733 U CN 2012200914733U CN 201220091473 U CN201220091473 U CN 201220091473U CN 202501982 U CN202501982 U CN 202501982U
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- 238000012546 transfer Methods 0.000 title claims abstract description 25
- 238000005461 lubrication Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 title abstract description 24
- 239000010409 thin film Substances 0.000 title abstract 2
- 238000004088 simulation Methods 0.000 claims abstract description 16
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 104
- 239000002828 fuel tank Substances 0.000 claims description 30
- 239000010687 lubricating oil Substances 0.000 claims description 17
- 239000000446 fuel Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000011160 research Methods 0.000 abstract description 7
- 239000010408 film Substances 0.000 abstract 2
- 238000013480 data collection Methods 0.000 abstract 1
- 239000013589 supplement Substances 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- -1 thermometer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003532 endogenous pyrogen Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 108010052620 leukocyte endogenous mediator Proteins 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model discloses a thin-film lubrication for high speed friction pair and a heat transfer test system. The test system comprises a test system mechanical platform, an oil film thickness and temperature simulation sub-system, a lubrication oil supplement sub-system and a data collection and control sub-system, wherein the test system mechanical platform comprises a sliding block mounting support, a grinding head, an elastic coupling, a motor, a grinding head fixing support, a motor fixing support and a cast iron plate; the cast iron plate is orderly provided with the sliding block mounting support, the grinding head fixing support and the motor fixing support; the grinding head is arranged at the grinding head fixing support; the motor is arranged at the motor fixing support; and the grinding head, the elastic coupling and the motor are orderly connected. The test system disclosed by the utility model can carry out a simulation test on lubrication and heat transfer law of a friction pair, i.e. a piston ring and a cylinder sleeve, in engine, and can also be used to research lubrication and heat transfer law of other friction pairs; and the test system can measure the thickness and surface temperature of oil film rapidly and accurately by using a high-precision capacitive thickness transducer and a surface thermoelectric couple.
Description
Technical field
The utility model relates to lubricated and heat transfer pilot system, relates in particular to a kind of high-speed friction secondary film lubrication and heat transfer pilot system of being used for.
Background technology
Along with manifesting gradually of energy crisis, the requirement of vehicle power property, economy and compactedness is improved constantly.In the passenger car field, the vehicle of float amount band turbocharging technology is following the dominating in market.And in the commercial car field, high speed, high-power and charge inter cooling technology universalness are the leading of commercial vehicle engine future development.
The development trend that the motor car engine field is above can impel engine structure compact more on the one hand, and the weight and volume of specific power reduces, and certainly will cause that but then engine heat load increases.
The heat transfer of this friction pair of piston ring-cylinder jacket is the main path that conducts heat in the engine cylinder, and the increase of engine heat load will certainly improve its conductive heat flow density.If can not efficiently radiates heat, can cause that piston temperature is too high so that burn, a series of problems such as burn deterioration, lubricating oil coking.Therefore, significant to the research of its HEAT TRANSFER LAW.
At present, scholars mainly concentrate on lubricated and friction aspect for the research of this friction pair of piston ring-cylinder jacket, visible a large amount of articles about finite element analysis and experimental study aspect.And less relatively for the research of HEAT TRANSFER LAW, and be mainly finite element analysis, be the one dimension thermal conduction resistance how with this heat transfer medium simple process of lubricating oil film, do not consider its fluid interchange characteristic.
The lubricated of this friction pair of piston ring-cylinder jacket is the process of a coupling with conducting heat, and should work in coordination with analysis.
Chinese patent [201335766] disclosed " cylinder sleeve and piston ring friction wear testing machine "; Chinese patent [2066981] disclosed " cylinder sleeve of engine-piston ring suspension domain formula wearing and tearing simulation test machine "; Chinese patent [101158619] disclosed " reciprocating type piston ring-cylinder sleeve friction wear testing machine " and Chinese patent [1789963] disclosed " a kind of cylinder liner piston ring component friction wear test method and equipment "; Its technical field all relates to piston ring and this friction pair of cylinder sleeve, but they all do not relate to the measurement of oil film thickness and the research of heat transfer aspect.
Summary of the invention
The purpose of the utility model is in order to solve the deficiency of prior art, a kind of high-speed friction secondary film lubrication and heat transfer pilot system of being used for to be provided.
Be used for secondary film lubrication of high-speed friction and heat transfer pilot system and comprise pilot system mechanical platform, oil film thickness and temperature simulation subsystem, lubricating oil supply subsystem and data acquisition and RACS.The pilot system mechanical platform comprises slide block mounting bracket, bistrique, spring coupling, motor, bistrique fixed support, motor fixed rack and cast iron surface plate; Be provided with slide block mounting bracket, bistrique fixed support and motor fixed rack on the cast iron surface plate in order; The bistrique fixed support is provided with bistrique; Motor fixed rack is provided with motor; Bistrique, spring coupling and motor link to each other in order; Described oil film thickness and temperature simulation subsystem comprise spring, slide block, flywheel, adjustment bolt, force transducer, electrically heated rod, oil film, first thermopair, second thermopair, three thermocouple, the 4th thermopair, oil film thickness sensor top crown and oil film thickness sensor bottom crown; Flywheel links to each other with bistrique, and the flywheel top is provided with slide block; Be provided with oil film between flywheel and the slide block; Be arranged with oil film thickness sensor top crown and oil film thickness sensor bottom crown at flywheel and slide block center; Side symmetry at flywheel and slide block center is respectively equipped with first thermopair and second thermopair; Opposite side symmetry at flywheel and slide block center is respectively equipped with three thermocouple and the 4th thermopair; Be provided with well heater in the slide block, the slide block top links to each other with spring one end through force transducer, and the spring other end links to each other with the slide block mounting bracket through the adjustment bolt.
Described oil film thickness and temperature simulation subsystem comprise adjustment bolt, spring, force transducer, slide block, electrically heated rod, thermopair, oil film thickness sensor and flywheel; Flywheel links to each other with bistrique, and the flywheel top is provided with slide block; Be provided with thermopair and oil film thickness sensor between flywheel and the slide block, be used to measure oil film thickness and Temperature Distribution; Be provided with well heater in the slide block, be used for to the slide block heating, with the Temperature Distribution under the simulation truth; The slide block top links to each other with spring one end through force transducer, and force transducer can obtain the quantized value of initial tension of spring, is convenient to post analysis; The spring other end links to each other with the slide block mounting bracket through the adjustment bolt, through rotating the pretightning force of adjustment bolt adjustable springs, is used to control oil film thickness.
Described lubricating oil is supplied with subsystem and is comprised oil storage fuel tank, thermometer, oil cooler, oil return oil pump, return filter, collection fuel tank, oil heater, fuel feeding filtrator, fuel feeding oil pump, flowmeter, flow controller and atomizer; The oil storage fuel tank links to each other with thermometer, oil cooler and fuel feeding filtrator respectively; Oil heater is installed in the oil storage fuel tank; Collection fuel tank, return filter, oil return oil pump link to each other with oil cooler in order; Fuel feeding filtrator, fuel feeding oil pump, flowmeter, flow controller link to each other with atomizer in order; Collect fuel tank and be arranged on the cast iron surface plate, flywheel is arranged on to be collected in the fuel tank; Atomizer is arranged on the slide block mounting bracket.
Described data acquisition with the internal module annexation of RACS is: the Embedded Real-Time controller links to each other with host computer with communication module, thermocouple signal acquisition card, capacitance signal capture card, voltage signal acquisition card, relay, frequency-variable controller respectively; Communication module links to each other with force transducer with oil storage fuel tank temperature sensor, oil pipe flow sensor respectively; The thermocouple signal acquisition card links to each other with thermopair; The capacitance signal capture card links to each other with the oil film thickness sensor; The voltage signal acquisition card links to each other with motor speed sensor; Relay links to each other with slider electrical heating rod, oil storage fuel tank heater and flow controller by-pass valve respectively; Frequency-variable controller links to each other with motor.
The utility model compared with prior art has beneficial effect.
1) the utility model can carry out the simulation test of this friction lubricating of piston ring-cylinder jacket and HEAT TRANSFER LAW in the engine, also can be used for the research of the lubricated and HEAT TRANSFER LAW of other friction pairs;
2) the utility model may command flywheel rotating speed, slide block temperature, oil film thickness and flow of lubrication and these test parameterss of temperature; Can monitor and real-time storage flywheel rotating speed, slide block and flywheel temperature, oil film thickness and temperature and flow of lubrication and these test parameterss of temperature and test parameters carried out analyzing and processing;
3) the utility model adopts high-precision capacitance-type thickness transducer and surface thermocouple, can carry out accurately measuring fast to oil film thickness and surface temperature.
Description of drawings
Fig. 1 is a kind of high-speed friction secondary film lubrication and heat transfer pilot system test platform structure synoptic diagram of being used for;
Fig. 2 is that the slide block of the utility model is installed and the transducer arrangements synoptic diagram;
Fig. 3 is that the lubricating oil of the utility model is supplied with the subsystem synoptic diagram;
Fig. 4 is the data acquisition and the RACS synoptic diagram of the utility model.
Embodiment
As shown in Figure 1, be used for secondary film lubrication of high-speed friction and heat transfer pilot system and comprise pilot system mechanical platform, oil film thickness and temperature simulation subsystem, lubricating oil supply subsystem and data acquisition and RACS.The pilot system mechanical platform comprises slide block mounting bracket 2, bistrique 7, spring coupling 8, motor 9, bistrique fixed support 10, motor fixed rack 11 and cast iron surface plate 12; Be provided with slide block mounting bracket 2, bistrique fixed support 10 and motor fixed rack 11 on the cast iron surface plate 12 in order; Bistrique fixed support 10 is provided with bistrique 7; Motor fixed rack 11 is provided with motor 9; Bistrique 7, spring coupling 8 and motor 9 link to each other in order.
As shown in Figure 2, described oil film thickness and temperature simulation subsystem comprise spring 4, slide block 5, flywheel 6, adjustment bolt 23, force transducer 24, electrically heated rod 25, oil film 26, the first thermopair 27a, the second thermopair 27b, three thermocouple 27c, the 4th thermopair 27d, oil film thickness sensor top crown 28a and oil film thickness sensor bottom crown 28b; Flywheel 6 links to each other with bistrique 7, and flywheel 6 tops are provided with slide block 5; Be provided with oil film 26 between flywheel 6 and the slide block 5; Be arranged with oil film thickness sensor top crown 28a and oil film thickness sensor bottom crown 28b at flywheel 6 and slide block 5 centers, be used to measure oil film thickness; Side symmetry at flywheel 6 and slide block 5 centers is respectively equipped with the first thermopair 27a and the second thermopair 27b; Opposite side symmetry at flywheel 6 and slide block 5 centers is respectively equipped with three thermocouple 27c and the 4th thermopair 27d, is used to measure oil film thickness and Temperature Distribution; Be provided with well heater 25 in the slide block 5, be used for to slide block 5 heating, with the Temperature Distribution under the simulation truth; Slide block 5 tops link to each other with spring 4 one ends through force transducer 24, and force transducer 24 can obtain the quantized value of spring 4 pretightning forces, is convenient to post analysis; Spring 4 other ends link to each other with slide block mounting bracket 2 through adjustment bolt 23, through rotating the pretightning force of adjustment bolt 23 adjustable springs 4, are used to control oil film thickness.
As shown in Figure 3, described lubricating oil is supplied with subsystem and is comprised oil storage fuel tank 13, thermometer 14, oil cooler 15, oil return oil pump 16, return filter 17, collects fuel tank 3, oil heater 18, fuel feeding filtrator 19, fuel feeding oil pump 20, flowmeter 21, flow controller 22 and atomizer 1; Oil storage fuel tank 13 links to each other with thermometer 14, oil cooler 15 and fuel feeding filtrator 19 respectively; Oil heater 18 is installed in the oil storage fuel tank 13; Collection fuel tank 3, return filter 17, oil return oil pump 16 link to each other with oil cooler 15 in order; Fuel feeding filtrator 19, fuel feeding oil pump 20, flowmeter 21, flow controller 22 and atomizer 1 link to each other in order; Collect fuel tank 3 and be arranged on the cast iron surface plate 12, flywheel 6 is arranged on to be collected in the fuel tank 3; Atomizer 1 is arranged on the slide block mounting bracket 2.
As shown in Figure 4, described data acquisition with the internal module annexation of RACS is: the Embedded Real-Time controller links to each other with host computer with communication module, thermocouple signal acquisition card, capacitance signal capture card, voltage signal acquisition card, relay, frequency-variable controller respectively; Communication module links to each other with force transducer with oil storage fuel tank temperature sensor, oil pipe flow sensor respectively; The thermocouple signal acquisition card links to each other with thermopair; The capacitance signal capture card links to each other with the oil film thickness sensor; The voltage signal acquisition card links to each other with motor speed sensor; Relay links to each other with slider electrical heating rod, oil storage fuel tank heater and flow controller by-pass valve respectively; Frequency-variable controller links to each other with motor.
The course of work of the utility model is following:
The process of the utility model simulation this friction lubricating of piston ring-cylinder jacket and heat transfer is used to study its lubricated and HEAT TRANSFER LAW.Also can be used for simultaneously the research of other friction lubricatings and HEAT TRANSFER LAW.
During test, with slide block and flywheel simulation piston ring and cylinder jacket, lubricating oil is supplied with subsystem and in its surface of contact, is sprayed into lubricating oil through shower nozzle, with simulation cylinder sleeve oil film.Motor links to each other with bistrique through shaft coupling, and bistrique drives flywheel and rotates, and realizes the relative motion between slide block and the flywheel.The flywheel arranged outside has the collection fuel tank, prevents lubricating oil splash test for contamination place, collects lubricating oil simultaneously and returns lubricating oil supply subsystem.
The testing table base plate adopts the cast iron workbench, and its surface smoothness height, good rigidly, unrelieved stress are little.The support of bistrique and motor adopts steel plate to be welded, and adopts bolt directly to connect no pad between each parts.Above measure has guaranteed the integral rigidity of stand, prevents that the elastic deformation of stand from influencing the measurement of oil film thickness.Simultaneously, testing table adopts lathe to use the high precision bistrique, and the bearing mode of its hydrostatic bearing has effectively reduced the beating degree when rotating, and has also improved the measuring accuracy of oil film thickness.
Lubricating oil is supplied with subsystem and is adopted closed cycle, filtrator is installed can reuses to guarantee lubricating oil, economizes on resources.Simultaneously, it is equipped with oil heater and oil cooler, to realize the accurately control of oil temperature.In addition, flow controller is installed also, accurately controls to realize oil pump capacity.The accurate control of oil temperature and oil mass is used for the lubricating oil state under the different operating modes of simulated engine.
Test is adopted VFC with motor, realizes controllable rotation speed, with the relative motion of simulated engine different rotating speeds lower piston ring and cylinder jacket.
Electrically heated rod simulated engine cylinder endogenous pyrogen to install in the slide block in the test produces the temperature field of a direction of heat flow by slide block to flywheel.Simultaneously, the heating rod heating power is controlled, with need not the load heat transfer situation of lower piston ring-cylinder jacket of simulated engine.
In the test, surface of friction pair adopts surface thermocouple, and response speed is fast.Thickness transducer adopts the high-precision capacitance-type thickness transducer, can measure oil film thickness in real time.
In the test, data acquisition and instrument control are accomplished by the Embedded Real-Time controller.Oil storage fuel tank temperature signal, oil pipe flow signal and initial tension of spring signal reach the Embedded Real-Time controller through communication module.Thermocouple signal, oil film thickness signal and motor speed signal are transferred to the Embedded Real-Time controller through corresponding data acquisition card.The Embedded Real-Time controller carries out analytical calculation by the control program that weaves in advance, and sends a control signal to slider electrical heating rod, oil storage fuel tank heater, flow controller by-pass valve and motor frequency conversion controller after receiving the appeal signal, realizes control in real time.Host computer is used for that system state shows and data storage, and the relation between host computer and the Embedded Real-Time controller is: though host computer close, but real-time controller operate as normal still.The total system automaticity is high, and system stability is good.
Claims (3)
1. one kind is used for high-speed friction secondary film lubrication and heat transfer pilot system, it is characterized in that comprising pilot system mechanical platform, oil film thickness and temperature simulation subsystem, lubricating oil supply subsystem and data acquisition and RACS; The pilot system mechanical platform comprises slide block mounting bracket (2), bistrique (7), spring coupling (8), motor (9), bistrique fixed support (10), motor fixed rack (11) and cast iron surface plate (12); Be provided with slide block mounting bracket (2), bistrique fixed support (10) and motor fixed rack (11) on the cast iron surface plate (12) in order; Bistrique fixed support (10) is provided with bistrique (7); Motor fixed rack (11) is provided with motor (9); Bistrique (7), spring coupling (8) and motor (9) link to each other in order; Described oil film thickness and temperature simulation subsystem comprise spring (4), slide block (5), flywheel (6), adjustment bolt (23), force transducer (24), electrically heated rod (25), oil film (26), first thermopair (27a), second thermopair (27b), three thermocouple (27c), the 4th thermopair (27d), oil film thickness sensor top crown (28a) and oil film thickness sensor bottom crown (28b); Flywheel (6) links to each other with bistrique (7), and flywheel (6) top is provided with slide block (5); Be provided with oil film (26) between flywheel (6) and the slide block (5); Be arranged with oil film thickness sensor top crown (28a) and oil film thickness sensor bottom crown (28b) at flywheel (6) and slide block (5) center; Side symmetry at flywheel (6) and slide block (5) center is respectively equipped with first thermopair (27a) and second thermopair (27b); Opposite side symmetry at flywheel (6) and slide block (5) center is respectively equipped with three thermocouple (27c) and the 4th thermopair (27d); Be provided with well heater (25) in the slide block (5); Slide block (5) top links to each other with spring (4) one ends through force transducer (24), and spring (4) other end links to each other with slide block mounting bracket (2) through adjustment bolt (23).
2. a kind of high-speed friction secondary film lubrication and heat transfer pilot system of being used for according to claim 1 is characterized in that described lubricating oil supply subsystem comprises oil storage fuel tank (13), thermometer (14), oil cooler (15), oil return oil pump (16), return filter (17), collects fuel tank (3), oil heater (18), fuel feeding filtrator (19), fuel feeding oil pump (20), flowmeter (21), flow controller (22) and atomizer (1); Oil storage fuel tank (13) links to each other with thermometer (14), oil cooler (15) and fuel feeding filtrator (19) respectively; Oil heater (18) is installed in the oil storage fuel tank (13); Collection fuel tank (3), return filter (17), oil return oil pump (16) link to each other with oil cooler (15) in order; Fuel feeding filtrator (19), fuel feeding oil pump (20), flowmeter (21), flow controller (22) and atomizer (1) link to each other in order; Collect fuel tank (3) and be arranged on the cast iron surface plate (12), flywheel (6) is arranged on to be collected in the fuel tank (3); Atomizer (1) is arranged on the slide block mounting bracket (2).
3. a kind of high-speed friction secondary film lubrication and heat transfer pilot system of being used for according to claim 1, it is characterized in that described data acquisition with the internal module annexation of RACS is: the Embedded Real-Time controller links to each other with host computer with communication module, thermocouple signal acquisition card, capacitance signal capture card, voltage signal acquisition card, relay, frequency-variable controller respectively; Communication module links to each other with force transducer with oil storage fuel tank temperature sensor, oil pipe flow sensor respectively; The thermocouple signal acquisition card links to each other with thermopair; The capacitance signal capture card links to each other with the oil film thickness sensor; The voltage signal acquisition card links to each other with motor speed sensor; Relay links to each other with slider electrical heating rod, oil storage fuel tank heater and flow controller by-pass valve respectively; Frequency-variable controller links to each other with motor.
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CN2012200914733U CN202501982U (en) | 2012-03-13 | 2012-03-13 | Thin-film lubrication for high speed friction pair and heat transfer test system |
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CN2012200914733U CN202501982U (en) | 2012-03-13 | 2012-03-13 | Thin-film lubrication for high speed friction pair and heat transfer test system |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102607835A (en) * | 2012-03-13 | 2012-07-25 | 浙江大学 | Film lubrication and heat transfer testing system for high-speed friction pair |
CN106524929A (en) * | 2016-12-07 | 2017-03-22 | 大连海事大学 | Test device of distribution states of lubricating oil films of cylinder sleeve and piston and test method thereof |
CN109029754A (en) * | 2018-08-29 | 2018-12-18 | 北京航空航天大学 | A kind of conical friction element temperature gradient measuring device |
CN109916810A (en) * | 2018-12-28 | 2019-06-21 | 中国矿业大学(北京) | The simulation of dry type sliding friction pair interface transient temperature and test macro and disk disk module |
CN111781105A (en) * | 2020-07-20 | 2020-10-16 | 杭州电子科技大学 | Method and device for detecting dynamic wetting and lubricating characteristics of spray type micro-droplet |
-
2012
- 2012-03-13 CN CN2012200914733U patent/CN202501982U/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102607835A (en) * | 2012-03-13 | 2012-07-25 | 浙江大学 | Film lubrication and heat transfer testing system for high-speed friction pair |
CN102607835B (en) * | 2012-03-13 | 2014-04-16 | 浙江大学 | Film lubrication and heat transfer testing system for high-speed friction pair |
CN106524929A (en) * | 2016-12-07 | 2017-03-22 | 大连海事大学 | Test device of distribution states of lubricating oil films of cylinder sleeve and piston and test method thereof |
CN106524929B (en) * | 2016-12-07 | 2020-12-15 | 大连海事大学 | Device and method for testing distribution state of lubricating oil films of cylinder sleeve and piston |
CN109029754A (en) * | 2018-08-29 | 2018-12-18 | 北京航空航天大学 | A kind of conical friction element temperature gradient measuring device |
CN109916810A (en) * | 2018-12-28 | 2019-06-21 | 中国矿业大学(北京) | The simulation of dry type sliding friction pair interface transient temperature and test macro and disk disk module |
CN109916810B (en) * | 2018-12-28 | 2024-05-07 | 中国矿业大学(北京) | Dry sliding friction pair interface transient temperature simulation and test system and disc module |
CN111781105A (en) * | 2020-07-20 | 2020-10-16 | 杭州电子科技大学 | Method and device for detecting dynamic wetting and lubricating characteristics of spray type micro-droplet |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
AV01 | Patent right actively abandoned |
Granted publication date: 20121024 Effective date of abandoning: 20140416 |
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