CN202793970U - Double-disc type lubricating oil tractive power testing machine - Google Patents
Double-disc type lubricating oil tractive power testing machine Download PDFInfo
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- CN202793970U CN202793970U CN 201220398477 CN201220398477U CN202793970U CN 202793970 U CN202793970 U CN 202793970U CN 201220398477 CN201220398477 CN 201220398477 CN 201220398477 U CN201220398477 U CN 201220398477U CN 202793970 U CN202793970 U CN 202793970U
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Abstract
A double-disc type lubricating oil tractive power testing machine comprises a motor I, a motor II, a coupler I, a coupler II, a lower disc shaft, an upper disc shaft, an upper disc, a lower disc, a hydraulic loading mechanism and a power testing mechanism, the testing machine can simulate the real work condition of the elastohydrodynamic lubrication state of lubricating oil, corresponding transmission contact pieces can slide while rolling, continuous loading is implemented, and the tractive power of the lubricating oil in the elastohydrodynamic state can be accurately measured.
Description
Technical field
The present invention relates to the surveying instrument in observation and control technology field, specifically measure the elastohydrodynamic lubrication traction test machine of lubricating oil.
Background technology
Elastohydrodynamic lubrication (elastohydrodynamic lubrication) principal feature is exactly to consider simultaneously elastic deformation and the viscous pressure effect of surface in contact, and the transmission contact elements such as rolling bearing, gear are in ehl status in most cases.Such as in rolling bearing, when bearing inner race rotates, produce elastic deformation between roller and the Internal and external cycle, will produce the friction force that drags the roller motion between roller and the lubricating oil film and be called drawing force.
This drawing force is very big on the dynamic behavior impact of the driving members such as rolling bearing, gear.Greatly affected kinetic stability and the life-span of retainer such as the oil film drawing force that exists between bearing roller and the raceway, if do not controlled, will cause the destruction of retainer, thereby have a strong impact on the life-span of rolling bearing.Therefore, carry out slip and the rolling that design bearing can not only be controlled rolling body according to the performance that drags of lubricating oil, and guaranteed to a great extent the stability of retainer, thus the life-span of having improved bearing.As seen, lubricating oil drawing force characteristic is to carry out the driving members such as rolling bearing, gear to design requisite significant data.The drawing force error ratio that calculates by theory is larger, generally will test drawing force by designing special traction test proving installation on the engineering.So it is significant to be lubricated the research of experimental measurement device of oily drawing force.
At present lubricating oil is carried out two Disk Machines of drag characteristics test or problem that ball dish testing machine exists is: 1. employing electric main shaft drives dish test specimen (or ball test specimen), cost is higher.2. can be along dish (or ball) test specimen of drawing force direction rotation, the friction force of its spring bearing (rolling bearing or hydrostatic bearing) itself is for the accurate test generation considerable influence of drawing force between two disks (or ball dish).3. the lubricating oil test device can only be realized radial loaded at present, can not realize axially and radially loading simultaneously.4. after the firm offer wearing and tearing, change the dish difficulty.
Summary of the invention
The present invention is for solving the problems of the technologies described above, design a kind of testing machine that can accurately measure the lubricating oil drawing force, this test function simulation lubricating oil ehl status real working condition, rolling movement is simultaneously with sliding motion between the corresponding transmission contact element, can load continuously, can accurately measure the size that plays lubricating oil drawing force under the stream mode.
The present invention is that the technical scheme that the deficiency that solves the problems of the technologies described above adopts is:
A kind of double-disk lubricating oil traction test machine, comprise that motor I, motor II, shaft coupling I, shaft coupling II, lower disc axle, upper disc shaft, upper disk and lower disc, hydraulic loading mechanism and force measuring machine form, the motor I is connected with the lower disc axle by the shaft coupling I, the motor I drives the lower disc that is connected with the lower shaft disc shaft and rotates, the motor II connects with upper disc shaft by the shaft coupling II, upper disc shaft passes hydraulic loading mechanism is connected with force measuring machine and is connected with upper disk, and the motor II drives upper disk and rotates;
Described force measuring machine comprises resistance strain plate, collector ring, electric wire strain gauge and computing machine, resistance strain plate is pressed close to upper disk setting and is sticked on upper disc shaft, collector ring is set on the disc shaft (108), and be arranged between disk and the hydraulic loading mechanism, the output terminal of resistance strain gage is connected with collector ring by wire, collector ring with electric signal transmission to electric wire strain gauge, electric wire strain gauge passes to computing machine with data, and computing machine is measured the size of bullet stream drawing force by data acquisition and data collection and analysis.
Hydraulic loading mechanism of the present invention is provided with and is provided with a cavity in casing, the casing, the inwall of casing is provided with boss, the upper disc shaft that is provided with the shaft shoulder passes cavity, and and boss and cabinet wall between form hydraulic cavities, tank ends is respectively equipped with bearing (ball) cover I and bearing (ball) cover II, and the casing upper end is provided with oil-in, and the lower end is provided with drain tap, two ends in the casing are provided with cylinder roller bearing I and cylinder roller bearing II, and are equipped with bearing (ball) cover I and bearing (ball) cover II respectively.
Testing machine of the present invention also is provided with examination dish quick-change mechanism, examination dish quick-change mechanism comprises pedestal, slideway, pilot hole, straight pin, base-plates surface is fixed with slideway, slideway is provided with pilot hole, slideway is provided with the slidably casing that is complementary with slideway, and straight pin passes pilot hole casing is fixed on the slideway.
Motion simulation of the present invention mechanism also comprises simulation box, and pinion wheel, gear wheel, upper disk and lower disc are arranged in the simulation box, and simulation box is provided with for the cylinder roller bearing III that supports upper disc shaft.
Motor I of the present invention and motor II are the stepless change speed adjustable DC motor.
The wheel rim of lower disc of the present invention is the conical surface.
The wheel rim of upper disk of the present invention is the conical surface.
The wheel rim of upper disk of the present invention is the conical surface, and the conical surface is provided with the annular protrusion that the cross section is circular arc.
The end that upper disc shaft of the present invention is connected with upper disk is elastic shaft.
Beneficial effect of the present invention is:
1, adopts the disk of conical surface wheel rim, axial loading force can be decomposited a part on the normal orientation perpendicular to the conical surface, therefore can realize easily loading when charger makes progress with the footpath in the axial direction, thereby so that the operating mode that simulates is closer to real working condition, so that the drawing force measurement is more accurate.
2, this testing machine cost is low, and loading range is large, and dynamometry is accurate, and is easy to adjust.
3, position that foil gauge pastes is positioned at the front of all spring bearings, so efficiently solve deficiency of the prior art, has namely solved the friction force of spring bearing own for the impact of picking up drawing force between the dish test specimen.Axially the large I of loading force is measured by another group foil gauge, two vertically, two radially are arranged symmetrically with, be barricaded as full-bridge circuit, eliminate torsional deflection and flexural deformation impact, this force measurements efficiently solves the hydraulic loaded out of true, and unsettled shortcoming can be at any time adjusted the size of loading force according to detected value.
4, three cylinder roller bearings are installed above the upper disc shaft, three bearings have not only guaranteed shaft rigidity, and do not offset axial loading force.Effective like this stable of loading force that guaranteed also makes testing machine structure compact simultaneously, and the accuracy of test improves.
5, the examination dish quick change of testing machine part has mainly comprised the hydraulic pressure casing, casing slideway, setting circle pin.After finding that the examination mill decreases, as long as pull up straight pin, pulling casing (simultaneously whole members of pulling the inside installation) moves right assigned address, just realized that upper lower disc is in axial staggering, only need open case lid after staggering, removing behind the shaft end ring is exchangeable disc, as long as again be moved to the left casing to assigned address, plug namely to have finished behind the straight pin and changes dish after finishing changing.The design of this part has alleviated operating personnel's labour intensity greatly, has also indirectly guaranteed that the precision of system is constant after once adjusting simultaneously.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the fundamental diagram of Fig. 1;
Fig. 3 is the structural representation of the hydraulic loading system among the traction test machine embodiment of the present invention;
Fig. 4 is the structural representation of the dish test specimen quick change part among the traction test machine embodiment of the present invention;
Fig. 5 is the structural representation of lower disc of the present invention;
Fig. 6 is the structural representation of upper disk of the present invention;
Fig. 7 is the structural representation of upper disk of the present invention;
Among the figure: 1, simulation mechanism, 101, the motor I, 102, the motor II, 103, the shaft coupling I, 104, the shaft coupling II, 105, pinion wheel, 106, gear wheel, 107, the lower shaft disc shaft, 108, upper disc shaft, 109, upper disk, 110, lower disc, 111, simulation box, 112, the cylinder roller bearing III, 2, hydraulic loading mechanism, 201, casing, 202, the shaft shoulder, 203, oil-in, 204, drain tap, 205, the bearing (ball) cover I, 206, the bearing (ball) cover II, 207, the cylinder roller bearing I, 208, the cylinder roller bearing II, 209, cavity, 210, boss, 211, hydraulic cavities, 3, force measuring machine, 301, resistance strain plate, 302, collector ring, 303, electric wire strain gauge, 304, computing machine, 4, examination dish quick-change mechanism, 401, pedestal, 402, slideway, 403, pilot hole, 404, straight pin.
Embodiment
As shown in the figure, a kind of double-disk lubricating oil traction test machine is comprised of motion simulation mechanism 1, hydraulic loading mechanism 2, force measuring machine 3 and examination dish quick-change mechanism 4,
Described hydraulic loading mechanism 2 is provided with casing 201, be provided with a cavity 209 in the casing 201, the inwall of casing 201 is provided with boss 210, the upper disc shaft 108 that is provided with the shaft shoulder 202 passes cavity 209, and and boss 210 and casing 201 inwalls between form hydraulic cavities 211, casing 201 two ends are respectively equipped with bearing (ball) cover I 205 and bearing (ball) cover II 206, casing 201 upper ends are provided with oil-in 203, the lower end is provided with drain tap 204, two ends in the casing 201 are provided with cylinder roller bearing I 207 and cylinder roller bearing II 208, and are equipped with bearing (ball) cover I 205 and bearing (ball) cover II 206 respectively;
Described motion simulation mechanism 1 comprises motor I 101, motor II 102, shaft coupling I 103, shaft coupling II 104, pinion wheel 105, gear wheel 106, lower disc axle 107, upper disc shaft 108, upper disk 109 and lower disc 110,
Motor I 101 is connected with pinion wheel 104 with axle by shaft coupling I 103, and pinion wheel 104 is meshed with gear wheel 106, and gear wheel 106 is connected with lower disc 110 by lower disc axle 107; Motor II 102 is connected with upper disc shaft 108 by shaft coupling II 104, upper disc shaft 108 passes bearing (ball) cover I 205, cylinder roller bearing I 207, the shaft shoulder 202, cylinder roller bearing II 208 and the bearing (ball) cover II 206 of hydraulic loading mechanism 2 successively, and is connected with upper disk 109; Upper disk 109 and lower disc 110 are fitted;
Described force measuring machine 3 comprises resistance strain plate 301, collector ring 302, electric wire strain gauge 303 and computing machine 304, resistance strain plate 301 is pressed close to upper disk 109 settings and is sticked on upper disc shaft 108, collector ring 302 is set on the disc shaft 108, and be arranged between disk 109 and the hydraulic loading mechanism 2, the output terminal of resistance strain gage 301 is connected with collector ring 302 by wire, collector ring 302 with electric signal transmission to electric wire strain gauge 303, electric wire strain gauge 303 passes to computing machine 304 with data, and computing machine 304 is measured the size of bullet stream drawing force by data acquisition and data collection and analysis;
Described examination dish quick-change mechanism 4 comprises pedestal 401, slideway 402, pilot hole 403, straight pin 404, pedestal 401 surfaces are fixed with slideway 402, slideway 402 is provided with pilot hole 403, slideway 402 is provided with the slidably casing 201 that is complementary with slideway 402, and straight pin 404 passes pilot hole 403 casing 201 is fixed on the slideway 402.
Described motion simulation mechanism 1 also comprises simulation box 111, and pinion wheel 105, gear wheel 106, upper disk 109 and lower disc 110 are arranged in the simulation box 111, and simulation box 111 is provided with for the cylinder roller bearing III 112 that supports upper disc shaft 108.
Described motor I 101 and motor II 102 are the stepless change speed adjustable DC motor.
The wheel rim of described lower disc 110 is the conical surface.
The wheel rim of described upper disk 110 is the conical surface.
The wheel rim of described upper disk 110 is the conical surface, and the conical surface is provided with the annular protrusion 113 that the cross section is circular arc.
The end that described upper disc shaft 108 is connected with upper disk 109 is elastic shaft.
The part that motion simulation mechanism rotates for driving upper disk drives the part that lower disc rotates.See from left to right, the part that drives the lower disc rotation is: connect 103 motions of drive shaft coupling I by sinistral motor I 101 by key, shaft coupling I 103 is by the motion of key connecting band moving axis, axle connects drive pinion wheel 105 by key and rotates, pinion wheel 105 drives gear wheel 106 and rotates, and gear wheel 106 connects the lower disc 110 that drives on lower disc axle 107 and the lower disc axle 107 by key and rotates.Disk is dextral motor II 102 in the driving, and motor II 102 connects 104 motions of drive shaft coupling II by key, and shaft coupling II 104 drives upper disc shaft 108 by the key connection and moves, and upper disc shaft 108 connects upper disk 109 motions of drive by key.The wheel rim of lower disc 110 is the conical surface, the structure of upper disk 109 has two kinds, and a kind of is that wheel rim is the conical surface, can cooperate artificial line to contact with lower disc, another kind is that the conical surface at conical surface wheel rim is provided with the disk that the cross section is the annular protrusion of circular arc, can the simulation points contact.Two motors I 101 and motor II 102 are the stepless change speed adjustable DC motor, and by regulating the rotating speed of two motors, so that the linear velocity of upper lower disc is different, but the rolling between the simulating contact spare is with the motion state of sliding.The rated speed of motor I 101 and motor II 102 is n=3000r/min, and gear-driven ratio of gear is i=5.45, and the diameter of disk contact area is d=96mm, and the maximum line velocity that can calculate thus disk is v=15.07m/s.Be 2m/s and disk reaches the minimum line rate request of ehl status, can satisfy the requirement of experiment fully.
Hydraulic loading mechanism as described in Figure 3.The shaft shoulder 202 of casing 201 and upper disc shaft 108, oil-in 203, drain tap 204 have consisted of a hydraulic cylinder structure, and the shaft shoulder 202 is equivalent to the piston in the hydraulic cylinder.Hydraulic oil enters from oil-in 203, then promotes the shaft shoulder 202, has realized axial hydraulic loaded.Because the cone structure of disk wheel rim so that the power that axial direction loads has the normal component perpendicular to surface of contact, thereby makes disk and lower disc forming method to loading up and down.When unloading, by drain tap 204, the unloading of can draining the oil easily.Hydraulic loaded is compared with mechanical load, can reduce by two vibrations between the contact disc, the serviceable life of raising dish test specimen, and loading, unloading operation are convenient.And the fixed support of upper disc shaft 108 is to realize by two cylinder roller bearings and bearing (ball) cover.Structure adopts cylinder roller bearing can allow small the moving axially of disc shaft 108 herein, and this moves is because the wearing and tearing of upper lower disc, and under the effect of loading force, produce.
Examination dish quick-change mechanism, as shown in Figure 4.The purpose of this partial design is in order to solve a following problem.The dish test specimen because wearing and tearing need to change, is cross-examined topic in order to solve fast quick change, ad hoc this part-structure of having counted after operation a period of time.As shown in the figure, slideway 402 is bolted on the pedestal 401 of testing machine, and what installed the slideway the inside is hydraulic pressure casing 201, and casing 201 can slide in slideway 402, and moving range is 30mm, shows in Fig. 1.Behind the position that moves to setting, straight pin 404 can be inserted in ready-made pilot hole 403 in the slideway, realizes the location.When needs are changed the examination dish, as long as straight pin is pulled out, then just casing 201 can be moved away from the contact area of disk together with upper disc shaft 108, upper disk 109, then realize changing dish, and do not need whole device dismounting.
Force measuring machine as shown in Figure 2.Comprise the resistance strain plate 301 that sticks on the disc shaft 108 the thinnest parts, be contained in the collector ring 302 on the disc shaft 108, also have electric wire strain gauge 303 and computing machine 304.Upper disc shaft 108 the thinnest parts are one section elastic shafts, in order to improve the measurement sensitivity of drawing torque, the elasticity shaft part is processed into the elastic shaft of diameter 15mm in the present embodiment, so that drawing torque is when changing, the variation of shaft distortion is larger, and foil gauge can test out the variation of drawing torque more delicately.The effect of collector ring 302 is to static electric wire strain gauge with above the computing machine with the electrical signal transfer on the rotation axis.The output terminal of resistance strain is guided on the collector ring 302 along the groove of offering on the upper disc shaft 108 through wire, pass the signal along on the electric wire strain gauge size that can measure bullet stream drawing force by data acquisition board and the data acquisition program of computing machine at last.In order to measure simultaneously the size of drawing force and axial loading force, paste two groups of foil gauges at elasticity shaft part place, wherein survey drawing force for one group, be barricaded as full-bridge circuit with four foil gauges, four become miter angle to arrange vertically, can eliminate like this axial deformation and diastrophic impact, accurately measure the drawing force size; Survey loading force for one group, be barricaded as full-bridge circuit with four foil gauges equally and measure, two vertically, and two radially are arranged symmetrically with, and eliminates torsional deflection and flexural deformation impact, accurately measures the loading force size.Two Disk Machines in the past adopt electric main shaft with hydrostatic bearing, its friction factor is near 0.002, although friction factor is very little, but because drawing force itself is just very little, also can produce 10% measuring error, if what use is rolling bearing, then friction factor is near 0.02, and the error of measuring like this is just larger.This testing machine is because be posted on foil gauge the front of all bearings, knowledge according to the mechanics of materials, the friction force of bearing without any impact, that is to say that this experimental machine can improve 10% measuring accuracy at least, efficiently solves bearing friction power to the impact of measuring accuracy on the traction force measurement.
When testing, at first to disk contact region lubricating oil spraying, then actuating motor I 101 and motor II 102, and adjust the rotating speed of motor I 101 and motor II 102, so that upper lower disc contact point is in the pure rolling state.Then open hydraulic loading mechanism and load, because the pyramidal structure of disk loads so that normal direction can be realized in the disk contact position.During High Rotation Speed, its mutual contact region will form certain thickness bullet stream oil film under the condition of sufficient lubrication.By the rotating speed of lower disc test specimen in the speed governing adjustment of motor I 101 and motor II 102, so that the linear velocity at contact point place is different, it is poor to produce certain sliding speed, and then oil film and two surface in contacts will produce corresponding bullet stream drawing force.Under the effect of drawing force, so that certain torsional deflection occurs in the upper disc shaft 108 at upper disk test specimen place, the distortion of elasticity shaft part wherein records by the resistance strain type sensor of pasting thereon, deformation signal is converted into electric signal, electric signal is guided to collector ring by wire along the groove of offering at main shaft, be delivered to again electric wire strain gauge, output voltage signal, voltage signal is converted into digital signal by the data acquisition board in the computer, is converted into the numerical value of drawing torque or drawing force through data acquisition program.
Claims (9)
1. double-disk lubricating oil traction test machine, it is characterized in that: comprise motor I (101), motor II (102), shaft coupling I (103), shaft coupling II (104), lower disc axle (107), upper disc shaft (108), upper disk (109) and lower disc (110), hydraulic loading mechanism (2) and force measuring machine (3) form, motor I (101) is connected with lower disc axle (107) by shaft coupling I (103), motor I (101) drives is connected 107 with the lower shaft disc shaft) lower disc (110) rotation that connects, motor II (102) connects with upper disc shaft (108) by shaft coupling II (104), upper disc shaft (108) passes hydraulic loading mechanism (2) is connected 3 with force measuring machine) and be connected with upper disk (109), disk (109) rotates in motor II (102) driving;
Described force measuring machine (3) comprises resistance strain plate (301), collector ring (302), electric wire strain gauge (303) and computing machine (304), resistance strain plate (301) is pressed close to upper disk (109) and is arranged and be sticked on upper disc shaft (108), collector ring (302) is set on the disc shaft (108), and be arranged between disk (109) and the hydraulic loading mechanism (2), the output terminal of resistance strain gage (301) is connected with collector ring (302) by wire, collector ring (302) with electric signal transmission to electric wire strain gauge (303), electric wire strain gauge (303) passes to computing machine (304) with data, and computing machine (304) is measured the size of bullet stream drawing force by data acquisition and data collection and analysis.
2. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: described hydraulic loading mechanism (2) is provided with casing (201), be provided with a cavity (209) in the casing (201), the inwall of casing (201) is provided with boss (210), the upper disc shaft (108) that is provided with the shaft shoulder (202) passes cavity (209), and and boss (210) and casing (201) inwall between form hydraulic cavities (211), casing (201) two ends are respectively equipped with bearing (ball) cover I (205) and bearing (ball) cover II (206), casing (201) upper end is provided with oil-in (203), the lower end is provided with drain tap (204), two ends in the casing (201) are provided with cylinder roller bearing I (207) and cylinder roller bearing II (208), and are equipped with bearing (ball) cover I (205) and bearing (ball) cover II (206) respectively.
3. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: described testing machine also is provided with examination dish quick-change mechanism (4), examination dish quick-change mechanism (4) comprises pedestal (401), slideway (402), pilot hole (403), straight pin (404), pedestal (401) surface is fixed with slideway (402), slideway (402) is provided with pilot hole (403), slideway (402) is provided with the slidably casing (201) that is complementary with slideway (402), and straight pin (404) passes pilot hole (403) casing (201) is fixed on the slideway (402).
4. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: described testing machine also comprises simulation box (111), pinion wheel (105), gear wheel (106), upper disk (109) and lower disc (110) are arranged in the simulation box (111), and simulation box (111) is provided with for the cylinder roller bearing III (112) that supports upper disc shaft (108).
5. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: described motor I (101) and motor II (102) are the stepless change speed adjustable DC motor.
6. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: the wheel rim of described lower disc (110) is the conical surface.
7. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: the wheel rim of described upper disk (109) is the conical surface.
8. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: the wheel rim of described upper disk (109) is the conical surface, the conical surface is provided with the annular protrusion that the cross section is circular arc (113).
9. a kind of double-disk lubricating oil traction test machine as claimed in claim 1, it is characterized in that: the end that described upper disc shaft (108) is connected with upper disk (109) is elastic shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398477 CN202793970U (en) | 2012-08-13 | 2012-08-13 | Double-disc type lubricating oil tractive power testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398477 CN202793970U (en) | 2012-08-13 | 2012-08-13 | Double-disc type lubricating oil tractive power testing machine |
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| CN202793970U true CN202793970U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220398477 Expired - Fee Related CN202793970U (en) | 2012-08-13 | 2012-08-13 | Double-disc type lubricating oil tractive power testing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728075A (en) * | 2014-01-07 | 2014-04-16 | 四川大学 | Tester for elastohydrodynamic lubricating oil film traction with spinning |
| CN104483239A (en) * | 2014-12-31 | 2015-04-01 | 东南大学 | Experimental device for shear yield stress of magnetorheological fluid under adjustable magnetic field |
| CN104990491A (en) * | 2015-07-23 | 2015-10-21 | 北京理工大学 | Method and device for testing film thickness of double-disc friction machine under condition of oil lubrication |
| CN112255144A (en) * | 2020-09-30 | 2021-01-22 | 杭州电子科技大学 | Rolling bearing lubricating grease rolling deposition film wetting characteristic test bed and test method thereof |
-
2012
- 2012-08-13 CN CN 201220398477 patent/CN202793970U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728075A (en) * | 2014-01-07 | 2014-04-16 | 四川大学 | Tester for elastohydrodynamic lubricating oil film traction with spinning |
| CN104483239A (en) * | 2014-12-31 | 2015-04-01 | 东南大学 | Experimental device for shear yield stress of magnetorheological fluid under adjustable magnetic field |
| CN104990491A (en) * | 2015-07-23 | 2015-10-21 | 北京理工大学 | Method and device for testing film thickness of double-disc friction machine under condition of oil lubrication |
| CN104990491B (en) * | 2015-07-23 | 2017-10-31 | 北京理工大学 | The thickness method of testing and device of double-arc spline rubbing machine under Oil Lubrication Condition |
| CN112255144A (en) * | 2020-09-30 | 2021-01-22 | 杭州电子科技大学 | Rolling bearing lubricating grease rolling deposition film wetting characteristic test bed and test method thereof |
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