CN104515733A - Lubricating oil film bearing capacity measuring device based on optical feedback and measuring method thereof - Google Patents
Lubricating oil film bearing capacity measuring device based on optical feedback and measuring method thereof Download PDFInfo
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- CN104515733A CN104515733A CN201310450160.1A CN201310450160A CN104515733A CN 104515733 A CN104515733 A CN 104515733A CN 201310450160 A CN201310450160 A CN 201310450160A CN 104515733 A CN104515733 A CN 104515733A
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Abstract
The invention provides a lubricating oil film bearing capacity measuring device based on optical feedback and a measuring method thereof. The measuring device comprises a rack. The rack is provided with a plane disc gyration unit and a microscopic interference measuring unit, and is also provided with a micro slide block adjusting and oil film bearing capacity measuring unit. The micro slide block adjusting and oil film bearing capacity measuring unit is arranged above the plane disc gyration unit and matched with the plane disc gyration unit. A press plate of the micro slide block adjusting and oil film bearing capacity measuring unit is provided with a sensor. The sensor is connected to a micro slide block. The film thickness is accurately measured by utilizing a multiple-beam interference method, and the oil film bearing capacity is directly measured by utilizing a pull pressure sensor, so that the problem of abrasion of a coating interface and the problem of parallelity keeping of two contact surfaces are effectively solved, the influence of surface modification on friction property is better researched through the direct measurement of the oil film bearing capacity of a bearing section, and higher engineering value is achieved.
Description
Technical field
The present invention relates to a kind of lubricating oil experimental provision, specifically refer to a kind of under fixing micro/nano level oil film thickness condition, the bearing capacity measurement mechanism of lubricating oil film between miniature slipper bearing, belongs to the experiment measuring field of lower pair contacting with fluid lubricating oil film.
Background technology
Film lubrication is an extremely important technical field of research in engineering, and it utilizes lubricating oil to form separation oil film between two friction solid surface, reduces surface abrasion.Surface Technics is an important branch of material science, utilizes process for modifying surface, thin film technique and coated layer technology etc., and making material surface obtain material itself does not have and wish the performance that has, thus effectively improves the greasy property between Contact Pair.
At present the experimental study of relevant Surface Engineering is friction force between measurement a pair friction surface and friction factor mostly, and used experimental provision is mostly UMT friction wear testing machine and makes easy device by oneself.The miniature slipper bearing measuring lubricating oil film instrument of people's developments such as Tu1Shi Qingdao Technological University Guo Feng, this measuring instrument is the successful Application of optical interferometry in hydrldynamic pressure lubrication research, perseverance can be measured to incline the thickness of angular contact contacting with fluid dynamic lubrication oil, utilize CCD directly can observe contact region oil film simultaneously, thus the application of research Surface Technics in tribology.
But the texture of material surface or coating are micron orders or even nano level, and utilize UMT friction wear testing machine to carry out in experimentation, maximum problem is that coating is easy to be rubbed, this is unfavorable for analyzing surface modification to the impact of greasy property.On the other hand, inventor measures in the process of oil film thickness in the experimental system shown in Fig. 1 and finds, keep two surface of contact all the time parallel actual be very difficult, reason is when in glass disc rotation process, due to the vibration of glass disc, the factors such as the vibration of oil film can affect the inclination angle between glass disc and miniature slide block.And oil film bearing capacity is the important parameter evaluating the secondary tribological property of lubricating contact in engineering, but finds through science retrieval, and the device measuring oil film bearing capacity is few in number.Measuring system shown in Fig. 1 is fixed load, measure the oil film thickness of glass disc under different rotating speeds between miniature slide block and glass disc, the present invention utilizes micro-displacement mechanism that the oil film thickness between miniature slipper bearing is fixed on submicron order, high-precision sensor is utilized directly to measure the bearing capacity of oil film in contact region, so that better research surface modification is on the impact of frictional behaviour, this will have more engineering significance than simple measurement oil film thickness.
Summary of the invention
The shortcoming existed for prior art and deficiency, technical matters to be solved by this invention is, a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback is provided, multiple beam interferometry is utilized accurately to measure thickness, the bearing capacity of tension-compression sensor to oil film is utilized directly to measure, effective solution coating interface wearing and tearing and the parallel problem keeping two surface of contact, and the direct measurement to oil film bearing capacity between supporting region, study surface modification better to the impact of frictional behaviour, there is higher construction value.
For solving the problems of the technologies described above, the technical solution used in the present invention is, a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback and measuring method thereof are provided, lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback comprises frame, frame is arranged plane disc turning unit and micro-interference measuring unit, frame is also arranged the adjustment of micro-slide block and oil film bearing capacity measuring unit, micro-slide block adjustment and oil film bearing capacity measuring unit are arranged on the top of plane disc turning unit, and match with plane disc turning unit, sensor installation on the pressing plate of micro-slide block adjustment and oil film bearing capacity measuring unit, sensor connects micro-slide block.
Above-mentioned a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback, adjusting screw(rod) installed by the pressing plate of its micro-slide block adjustment and oil film bearing capacity measuring unit, adjusting screw(rod) connects crosshead, and crosshead is by adjustment disk connecting sensor, and sensor connects micro-slide block.
Above-mentioned a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback, its sensor, by sensor connecting piece connection sliding block mount pad, slide block mount pad fixes micro-slide block.
The measuring method of the above-mentioned lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback, comprises the steps:
The first step, adjustment is fixed angle also: micro-slide block contacts with glass disc, regulates the angle between micro-slide block and glass disc, makes its fixed angle;
Second step, applies pressure: utilize micro-slide block to adjust and the pressing plate of oil film bearing capacity measuring unit applies downward power to micro-slide block, guarantees that micro-slide block is lifted and keeps with glass disc the fixed interval (FI) h that sets
0;
3rd step, micro-slide block rises: regulate micro-slide block to adjust and the lifting displacement platform of oil film bearing capacity measuring unit, slowly lifted by pressing plate, micro-slide block and glass disc is slowly departed from and both gaps become large gradually; In the process, the indicating value of force cell is zero show that both depart from completely;
4th step, data processing: the change utilizing the micro-slide block of micro-interference measuring unit record light intensity in uphill process, then stop moving displacement platform, data processing is carried out in the change according to light intensity, obtains the gap h of micro-slide block and glass disc
0;
5th step, records oil film bearing capacity change curve: when oil film thickness is fixed as h
0time, drive the glass disc of plane disc turning unit at the uniform velocity to rotate, now oil film is measured by sensor the acting force that micro-slide block applies, and obtains oil film bearing capacity change curve after data processing.
Micro-slide block obtains by different surface modifying method (coating as different surfaces texture or different materials) process, again by changing lubricating oil, glass disc rotating speed, the operating modes such as the inclination angle of micro-slide block and glass disc and gap, revision test is to study the impact of surface modification on friction, lubrication performance.
The difference of the present invention and background technology patent of invention 200810249672.0 miniature slipper bearing measuring lubricating oil film instrument is:
1, the present invention is under fixing thickness is submicron order condition, directly measures oil film bearing capacity; And the measuring instrument in background technology is under static load conditions, the oil film thickness of micro-slide block and glass disc is measured.
2, in a dynamic condition, the micro-slide block of regulation and control and glass disc keep fixing parallel distance, and it is easier that the present invention implements compared with the measuring instrument in background technology.
3, the Bit andits control of accurate lifting table is effectively combined with the FEEDBACK CONTROL of optical interferometry by the present invention, and micro-slide block can be made to realize accurately locating at submicron order with the parallel oil clearance between glass disc.
Tool of the present invention has the following advantages and Advantageous Effects:
1, the lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback of the present invention can under fixing thickness be submicron order condition, the problem of effective solution coating interface wearing and tearing, direct measurement oil film bearing capacity, study surface modification better to the impact of frictional behaviour, for engineering practice provides necessary theoretical foundation.
2, the lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback of the present invention in a dynamic condition, the micro-slide block of regulation and control and glass disc keep fixing parallel distance, it is easier to implement, thus can study the impact of surface modification on frictional behaviour better.
3, the Bit andits control of accurate lifting table is effectively combined with the FEEDBACK CONTROL of optical interferometry by the lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback of the present invention, and micro-slide block can be made to realize accurately locating at submicron order with the parallel oil clearance between glass disc.
Accompanying drawing explanation
Fig. 1 is the present invention's miniature slipper bearing measuring lubricating oil film instrument structural representation of the prior art;
Fig. 2 is structural representation of the present invention;
Fig. 3 is that in Fig. 2, micro-slide block adjustment and oil film bearing capacity measuring unit coordinate schematic diagram with plane disc turning unit;
Fig. 4 is the partial structurtes schematic diagram of the sensor mounting location of micro-slide block adjustment and oil film bearing capacity measuring unit in Fig. 2;
Fig. 5 is control flow block diagram of the present invention;
Fig. 6 is software supervision interface schematic diagram in embodiment;
Fig. 7 is micro-slide block uphill process schematic diagram in embodiment;
Fig. 8 is light intensity curve figure corresponding in embodiment;
Fig. 9 is the cracking figure recorded in embodiment.
In above-mentioned figure:
The micro-slide block adjustment of 1-and oil film bearing capacity measuring unit, 2-plane disc turning unit, 3-micro-interference measuring unit, 4-frame, 5-is elevated displacement platform, 6-latch mechanism, the micro-slide block of 7-, 8-slide block mount pad, 9-sensor connecting piece, 10-sensor, 11-adjustment disk, 12-crosshead, 13-pressing plate, 14-adjusting screw(rod).
Embodiment
The lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback of the present embodiment comprises frame 4, frame 4 is arranged plane disc turning unit 2 and micro-interference measuring unit 3, frame 4 is also arranged the adjustment of micro-slide block and oil film bearing capacity measuring unit 1, micro-slide block adjustment and oil film bearing capacity measuring unit 1 are arranged on the top of plane disc turning unit 2, and match with plane disc turning unit 2, sensor installation 10 on the pressing plate 13 of micro-slide block adjustment and oil film bearing capacity measuring unit 1, sensor 10 connects micro-slide block 7.Adjusting screw(rod) 14 installed by the pressing plate 13 of micro-slide block adjustment and oil film bearing capacity measuring unit 1, adjusting screw(rod) 14 connects crosshead 12, crosshead 12 is by adjustment disk 11 connecting sensor 10, and sensor 10, by sensor connecting piece 9 connection sliding block mount pad 8, slide block mount pad 8 is fixed micro-slide block 7.
The present embodiment utilizes optical interferometry under fixing oil film thickness condition, measure the bearing capacity of oil film, and its step is as follows:
The first step, adjustment is fixed angle also: micro-slide block 7 contacts with glass disc, the reference position of 1 correspondence as shown in Figure 7, regulate the angle between micro-slide block 7 and glass disc, it is made to fix certain inclination angle, the centre position of 2 correspondences as shown in Figure 7, and angle regulation method with introduce in the patent of invention 200810249672.0 miniature slipper bearing measuring lubricating oil film instrument in background technology identical, repeat no more.
Second step, applies pressure: utilize locking mechanism 6 to apply downward power to micro-slide block 7, guarantees that micro-slide block 7 is lifted and the fixed interval (FI) h keeping certain to set with glass disc
0, now notice that the power applied is not excessive, damaged with no-sensor 10 outrange;
3rd step, micro-slide block rises: because pressing plate 13 and lifting displacement platform 5 are fixed together, regulate lifting displacement platform 5, pressing plate 13 slowly can be lifted, and namely micro-slide block 7 slowly departs from glass disc and both gaps become large gradually; In the process, the indicating value of sensor 10 is zero show that both depart from completely;
4th step, data processing: the change utilizing micro-interference measuring unit 3 and the micro-slide block 7 of monitoring software record light intensity in uphill process, then stop moving lifting displacement platform 5, data processing is carried out in the change according to light intensity, obtains the gap h of micro-slide block 7 and glass disc
0, as shown in Figure 8; In the present embodiment, be 240nm according to the changing value calculating the light intensity of trying to achieve a complete wavelength and change corresponding oil film thickness; If ensure, the gap of micro-slide block and glass disc is 480nm, can stop moving displacement platform immediately when light intensity is changed to two wavelength; Because this is a gradual process, so this operation is easy to realize;
5th step, records oil film bearing capacity change curve: when oil film thickness is fixed as h
0time, servo-drive system is utilized to drive glass disc to rotate with certain speed, now oil film can be measured with High Precision Strength Measurement Sensor the acting force that micro-slide block 7 applies, and carries out data processing and display in real time with the monitoring software shown in Fig. 6, records the oil film bearing capacity change curve shown in Fig. 9.
Micro-slide block obtains by different surface modifying method (coating as different surfaces texture or different materials) process, again by changing lubricating oil, glass disc rotating speed, the operating modes such as the inclination angle of micro-slide block and glass disc and gap, revision test is to study the impact of surface modification on friction, lubrication performance.
The above is only to preferred embodiment of the present invention, and be not do other forms of restriction to the present invention, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But, everyly do not depart from the present invention program's content, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and remodeling, still belong to protection scope of the present invention.
Claims (4)
1. the lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback, it comprises frame, frame is arranged plane disc turning unit and micro-interference measuring unit, frame is also arranged the adjustment of micro-slide block and oil film bearing capacity measuring unit, micro-slide block adjustment and oil film bearing capacity measuring unit are arranged on the top of plane disc turning unit, and match with plane disc turning unit, it is characterized in that: sensor installation on the pressing plate of described micro-slide block adjustment and oil film bearing capacity measuring unit, sensor connects micro-slide block.
2. a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback according to claim 1, it is characterized in that: adjusting screw(rod) installed by the pressing plate of described micro-slide block adjustment and oil film bearing capacity measuring unit, adjusting screw(rod) connects crosshead, crosshead is by adjustment disk connecting sensor, and sensor connects micro-slide block.
3. a kind of lubricating oil film bearing capacity measurement mechanism based on bulk of optical feedback according to claim 1, is characterized in that: described sensor, by sensor connecting piece connection sliding block mount pad, slide block mount pad fixes micro-slide block.
4., as claimed in claim 1 based on a measuring method for the lubricating oil film bearing capacity measurement mechanism of bulk of optical feedback, it is characterized in that, comprise the steps:
The first step, adjustment is fixed angle also: micro-slide block contacts with glass disc, regulates the angle between micro-slide block and glass disc, makes its fixed angle;
Second step, applies pressure: utilize micro-slide block to adjust and the pressing plate of oil film bearing capacity measuring unit applies downward power to micro-slide block, guarantees that micro-slide block is lifted and keeps with glass disc the fixed interval (FI) h that sets
0;
3rd step, micro-slide block rises: regulate micro-slide block to adjust and the lifting displacement platform of oil film bearing capacity measuring unit, slowly lifted by pressing plate, micro-slide block and glass disc is slowly departed from and both gaps become large gradually; In the process, the indicating value of force cell is zero show that both depart from completely;
4th step, data processing: the change utilizing the micro-slide block of micro-interference measuring unit record light intensity in uphill process, then stop moving displacement platform, data processing is carried out in the change according to light intensity, obtains the gap h of micro-slide block and glass disc
0;
5th step, records oil film bearing capacity change curve: when oil film thickness is fixed as h
0time, drive the glass disc of plane disc turning unit at the uniform velocity to rotate, now oil film is measured by sensor the acting force that micro-slide block applies, and obtains oil film bearing capacity change curve after data processing.
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| CN201310450160.1A CN104515733A (en) | 2013-09-29 | 2013-09-29 | Lubricating oil film bearing capacity measuring device based on optical feedback and measuring method thereof |
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| CN201310450160.1A CN104515733A (en) | 2013-09-29 | 2013-09-29 | Lubricating oil film bearing capacity measuring device based on optical feedback and measuring method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277515A (en) * | 2015-11-17 | 2016-01-27 | 中国科学院兰州化学物理研究所 | Ball-disc sliding friction pair liquid lubricating state optical testing device in vacuum environment |
| CN106767461A (en) * | 2017-02-27 | 2017-05-31 | 青岛理工大学 | A kind of face contacts lubrication experiment machine oil film thickness On-line Measuring Method |
| CN107402098A (en) * | 2017-09-07 | 2017-11-28 | 青岛理工大学 | A kind of different sliding rollings are than lower composite lubricating film frictional force and wear process measurement apparatus |
| CN112816233A (en) * | 2021-01-04 | 2021-05-18 | 青岛理工大学 | Ball socket type bionic joint lubricating film measuring device |
-
2013
- 2013-09-29 CN CN201310450160.1A patent/CN104515733A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277515A (en) * | 2015-11-17 | 2016-01-27 | 中国科学院兰州化学物理研究所 | Ball-disc sliding friction pair liquid lubricating state optical testing device in vacuum environment |
| CN106767461A (en) * | 2017-02-27 | 2017-05-31 | 青岛理工大学 | A kind of face contacts lubrication experiment machine oil film thickness On-line Measuring Method |
| CN106767461B (en) * | 2017-02-27 | 2019-04-02 | 青岛理工大学 | A kind of face contact lubrication experiment machine oil film thickness On-line Measuring Method |
| CN107402098A (en) * | 2017-09-07 | 2017-11-28 | 青岛理工大学 | A kind of different sliding rollings are than lower composite lubricating film frictional force and wear process measurement apparatus |
| CN112816233A (en) * | 2021-01-04 | 2021-05-18 | 青岛理工大学 | Ball socket type bionic joint lubricating film measuring device |
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