CN103234466A - Oil film thickness measuring device - Google Patents
Oil film thickness measuring device Download PDFInfo
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- CN103234466A CN103234466A CN2013101092576A CN201310109257A CN103234466A CN 103234466 A CN103234466 A CN 103234466A CN 2013101092576 A CN2013101092576 A CN 2013101092576A CN 201310109257 A CN201310109257 A CN 201310109257A CN 103234466 A CN103234466 A CN 103234466A
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Abstract
The invention relates to oil film thickness measuring device and method, in particular to oil film thickness measuring device and method under the conditions of steady and unsteady states and belongs to the technical field of lubricating oil. The oil film thickness measuring device comprises a load loading mechanism, a rotary power mechanism and a load measuring mechanism. The load loading mechanism comprises a motor and an eccentric wheel arranged on the motor, a loading plate is arranged below the eccentric wheel, one end of the loading plate is fixed on a lower leaf spring of the load loading mechanism, and the other end of the loading plate is a free end. The oil film thickness measuring device can measure the thickness of lubricating oil film under the conditions of steady and unsteady states and is applicable to the field of scientific research on lubricating theory and technology.
Description
Technical field
The present invention relates to a kind of oil film thickness measurement mechanism and method, particularly oil film thickness measurement mechanism and method under stable state and the unsteady state condition belong to technical field of lubricating oil.
Background technology
The measurement of oil film thickness is significant for the research of lubricating status, the method of film thickness measuring has multiple, wherein optical interferometry is to generally acknowledge one of method comparatively accurately, but present research range still is confined to stable state research, lubricating property research for the non-steady state loading aspect mainly is the method that adopts numerical simulation, the shortcoming of this method is to be foundation with the theoretical formula, there is not actual lubrication experiment to do checking, the simulation conclusion does not have persuasion property completely, and occurs error easily.
Summary of the invention
For the ease of the lubricating oil film characteristic under the research non-steady state loading condition, the invention provides a kind of measurement mechanism of measuring oil film thickness under the non-steady state loading conditioned disjunction steady state loading condition and be equipped with and method.
A kind of oil film thickness measurement mechanism, described device comprises load load maintainer, revolving power mechanism and load measurement mechanism, described load load maintainer comprises motor and is located at loading wheel on the motor, load the wheel below and be provided with load plate, one end of described load plate is fixed on the lower spring sheet in the load load maintainer, and the other end is free end.
Loading wheel in the device of the present invention is for providing any type of loading wheel of unstable state loading force, its selection can be determined according to the unsteady state condition that need are created, the present invention preferably loads wheel and is eccentric wheel, cam, thereby realizes non-steady state loading forms such as gradual change load or sudden change load.
When device of the present invention uses eccentric wheel as the loading wheel, vertical range between eccentric wheel and load plate between the eccentric wheel point of rotation apart between the distance of circumference most proximal end and distal-most end, make eccentric wheel portion of time when rotating a circle contact load plate, portion of time breaks away from load plate, constitutes the unstable state environment.
Eccentric wheel of the present invention and load plate surface of contact need very smooth, and eccentric wheel is preferably driven by direct current generator, and direct current generator fixedly is on the framework I of load load maintainer.Direct current generator drives eccentric wheel and rotates, eccentric wheel contacts with load plate and to its downward imposed load with rotating gradually away from axis client, the eccentric wheel distal-most end breaks away from until whole eccentric wheel and load plate by the unloading gradually of beginning after the load plate, finishes a non-steady state loading cycle.
Device of the present invention can be according to parameters such as the required eccentric size of unstable state environmental selection, the eccentric point of rotation, motor speeds.The non-steady state loading variation range can be regulated easily by the vertical height of adjusting eccentric wheel axle center and load bar, and the variable load time span can be realized by regulating dc motor speed; The non-steady state loading curve can be by changing the eccentric wheel size adjustment.
The preferred following mechanism of load load maintainer of the present invention:
Described load load maintainer comprises framework I, loads handle, spring leaf module, roller, steel ball clamp body,
Described spring leaf module is made up of upper spring sheet and lower spring sheet, two sides of upper spring sheet and lower spring sheet by have certain thickness fixed block fixed to one another be connected to make between upper spring sheet and lower spring sheet form certain space; The upper spring sheet links to each other with the loading handle, and the lower spring sheet links to each other with pressure transducer I, and described pressure transducer I is used for measuring in real time the loading force that is applied on the glass disc;
One end of described load plate is fixed on the lower spring sheet, and the other end is free end, and vertically place and loads wheel at certain altitude place, load plate top, loads wheel and connect motor, and motor is fixed on the framework I;
Described pressure transducer I below fixed idler whell, the roller below is provided with the steel ball clamp body, and described steel ball clamp body is fixed on the vertical guide rail, and the two is fixedly installed on the horizontal guide rail on the back shroud of framework I; Steel ball clamp body 4 one side setting pressure sensor II, described pressure transducer II be used for to measure the friction force that produces when sliding between steel ball on the steel ball clamp body and glass disc;
Described steel ball clamp body below is provided with revolving power mechanism, and described revolving power mechanism comprises that for the glass disc of splendid attire oil film to be measured and universal stage, described glass disc is fixed on the universal stage;
Two ends, the left and right sides, described load load maintainer framework I below are fixed on the horizontal linear guide rail, and the horizontal linear guide rail is fixed on the framework II of load measurement mechanism.
Device of the present invention adopts the mode that handle combines with the spring leaf module that loads, the spring leaf module is made up of upper and lower spring leaf, two spring leaf two ends use two rectangular modules fixedly connected respectively, make between two spring leafs and form the space, the upper spring sheet links to each other with the loading handle, and the lower spring sheet links to each other with pressure transducer I, during use, load handle and be rotated down spring leaf module imposed load, the spring leaf module is passed to pressure transducer I and steel ball with load.
The steel ball clamp body slides up and down with the variation of load in the device of the present invention, moves horizontally with the variation of friction force is relative with roller.The steel ball clamp body connects adjustable extension spring, can be with the self gravitation balance by this adjustable extension spring steel ball clamp body, regulate principle and be roller contact and pressure transducer I registration at this moment is zero with the steel ball clamp body.
The preferred described universal stage of device of the present invention is adjustable rotating speed electric rotary table.
Pressure transducer I of the present invention and II preferably are used variation with real-time monitors load with data collecting card and Labview program.
Preferred following mechanism of load measurement mechanism of the present invention:
Described load measurement mechanism comprises framework II, microscope, ccd sensor and three-dimensional working platform, place microscope under the universal stage, microscope is fixed on the three-dimensional working platform, the microscope bottom connects ccd sensor, and described ccd sensor is used for the interference image digitized processing is shown in computing machine.
Oil film thickness is the mean value of the thickness of each point of interference image central area.Carry out interference image when handling, at first the light intensity value of the interference image that extracts is strengthened handling, the back obtains the film thickness value of interference image central area each point of arbitrary straight line based on the relative light intensity principle.
When stating device in the use, can regulate universal stage makes its rotational speed be periodically increase and decrease, and in conjunction with regulating the load load maintainer so that the periodically loading force of increase and decrease to be provided, can be implemented under the double condition of unstable state speed change degree and unstable state variable load the measurement to lubrication film thickness.
The invention has the beneficial effects as follows: the present invention can realize non-steady state loading simply and easily, pressure transducer and data collecting card and Labview program can be used, the variation of monitors load so in real time, the non-steady state loading curve form that relates among the present invention is the class sinusoidal curve, is convenient to the analytical test result; The non-steady state loading variation range can be regulated easily by the vertical height of adjusting eccentric wheel axle center and load bar, and the variable load time span can be realized by regulating dc motor speed; The non-steady state loading curve can also be replaced by cam or other forms with eccentric wheel according to test operating mode needs, thereby realize non-steady state loading forms such as gradual change load or sudden change load by changing the eccentric wheel size adjustment.
Description of drawings
Fig. 1 is a kind of front elevation (not comprising the non-steady state loading part) of oil film thickness measurement mechanism.
Fig. 2 is a kind of side view (comprising the non-steady state loading part) of load load maintainer.
Fig. 3 is load load maintainer part detail drawing among Fig. 2;
Fig. 4 is that embodiment 1 measures film thickness value and Hamrock-Dowson theoretical formula calculated value comparison diagram,
Among the figure, EX-expression experiment measuring film thickness value; HD-expression Hamrock-Dowson theoretical formula calculated value.
Reference numeral is as follows: 1, load handle, 2, the spring leaf module, 201, the upper spring sheet, 202, lower spring sheet, 3, roller, 4, the steel ball clamp body, 5, glass disc, 6, the horizontal linear guide rail, 7, universal stage, 8, ccd sensor, 9, three-dimensional working platform, 10, microscope, 11, steel ball, 12, pressure transducer II, 13, pressure transducer I, 14, back shroud, 15, eccentric wheel, 16, motor, 17, load plate, 18, electric machine support, 19, axle, 20, screw, 21, vertical guide rail, 22, horizontal guide rail.
Embodiment
Following non-limiting example can make those of ordinary skill in the art more fully understand the present invention, but does not limit the present invention in any way.
Fig. 1 shows a kind of front elevation (not comprising the non-steady state loading part) of oil film thickness measurement mechanism, is divided into two parts up and down, and top is divided into the load load maintainer, and the bottom is divided into load measurement mechanism.This embodiment selects for use eccentric wheel 15 as loading wheel.
The two ends, the left and right sides, framework I below of load load maintainer are fixed on the horizontal linear guide rail 6, and horizontal linear guide rail 6 is fixed on the framework II of load measurement mechanism.Regulate the position of load load maintainer with this by slip horizontal linear guide rail 6 slide blocks, thereby change the contact radius between steel ball 11 and the glass disc 5.
Load handle 1 by the back shroud 14 of the fixedly connected framework I of screw thread, and be fixed in framework I top, load handle 1 lower end and be connected with spring leaf module 2, this module is moved up and down with loading handle 1.Spring leaf module 2 is made up of upper and lower spring leaf, two spring leaf two ends use two rectangular modules fixedly connected respectively, make between two spring leafs and form certain space, upper spring sheet 201 links to each other with loading handle 1, lower spring sheet 202 links to each other with pressure transducer I13, during use, load handle 1 and be rotated down spring leaf module imposed load, the spring leaf module is passed to pressure transducer I13 and steel ball 11 with load.Pressure transducer I13 is used for measuring in real time the loading force that is applied on the glass disc.
Described pressure transducer I13 below fixed idler whell 3, roller 3 belows are provided with steel ball clamp body 4, described steel ball clamp body 4 is fixed on the vertical guide rail 21, and the two is fixedly installed on the horizontal guide rail 22 on the framework I back shroud, steel ball clamp body 4 one side setting pressure sensor II12, described pressure transducer II12 are used for measuring steel ball 11 and 5 friction force that produce when sliding of glass disc on the steel ball clamp body 4.Pressure transducer II12 one end is connected with steel ball clamp body 4, and the other end is fixed on the framework I.
Steel ball clamp body 4 slides up and down with the variation of load, moves horizontally to measure friction force with the variation of friction force and roller 3 are relative.Steel ball clamp body 4 with the self gravitation balance, is regulated principle and is roller 3 contact and pressure transducer I12 registration at this moment is zero with steel ball clamp body 4 by adjustable extension spring.Rotation loads handle 1 and moves down and make steel ball 11 with after glass disc 5 contacts, and continues to move down making the spring leaf module cause elastic deformation, and this load is passed to steel ball 11 and glass disc 5 contact areas.Form oil groove between glass disc 5 superjacent air spaces and the glass disc clamp body, electric rotary table 7 drives glass disc 5 rotations that are fixed thereon, and makes 5 one-tenth points of steel ball 11 and glass dish type contact to slide and lubricates.
Place monocular tube microscope 10 under the universal stage 7, microscope is fixed on the three-dimensional working platform 9, by regulating horizontal level and the height that three-dimensional working platform 9 changes microscope 10, in order to draw the optical interference picture of steel ball 11 and glass disc 5 contact areas, the microscope bottom connects ccd sensor 8, is used for the interference image digitized processing is shown in computing machine.
Can measure various lubricating oil at a contact unstable state film lubrication oil film thickness, experiment is CD10W-30 lubricating oil with oil; Eccentric wheel diameter 40mm, eccentric throw 30mm; The rotation center position is the 20mm place directly over load plate 17 free-ended; Motor speed is 7 rev/mins; Measurement result in load is respectively: 1.96N, 3.92N, 5.88N, when Entrainment Velocity is changed to 0～22mm/s, measure film thickness value and conform to substantially with Hamrock-Dowson theoretical formula calculated value, specifically measure film thickness value and Hamrock-Dowson theoretical formula calculated value is seen Fig. 4.
Claims (5)
1. oil film thickness measurement mechanism, described device comprises load load maintainer, revolving power mechanism and load measurement mechanism, described load load maintainer comprises motor (16) and is located at loading wheel on the motor (16), load the wheel below and be provided with load plate (17), one end of described load plate (17) is fixed on the lower spring sheet (202) in the load load maintainer, and the other end is free end.
2. device according to claim 1 is characterized in that: described loading wheel is eccentric wheel (15) or cam.
3. device according to claim 1 is characterized in that: described load load maintainer comprises framework I, loads handle (1), spring leaf module, roller (3), steel ball clamp body (4),
Described spring leaf module is made up of upper spring sheet (201) and lower spring sheet (202), (202) two sides of upper spring sheet (201) and lower spring sheet by have certain thickness fixed block fixed to one another be connected to make between upper spring sheet (201) and lower spring sheet (202) form certain space; Upper spring sheet (201) links to each other lower spring sheet (202) and pressure transducer I(13 with loading handle (1)) link to each other described pressure transducer I(13) for measuring the loading force that is applied on the glass disc (5) in real time;
One end of described load plate (17) is fixed on the lower spring sheet (202), and the other end is free end, and vertically place and loads wheel at certain altitude place, load plate (17) top, loads wheel and connect motor (16), and motor (16) is fixed on the framework I;
Described pressure transducer I(13) below fixed idler whell (3), roller (3) below is provided with steel ball clamp body (4), described steel ball clamp body (4) is fixed on the vertical guide rail (21), and the two is fixedly installed on the horizontal guide rail (22) on the back shroud (14) of framework I; Steel ball clamp body (4) one side setting pressure sensor II(12), described pressure transducer II(12) be used for to measure the friction force of generation when sliding between steel ball (11) and glass disc (5) on the steel ball clamp body (4);
Described steel ball clamp body (4) below is provided with revolving power mechanism, and described revolving power mechanism comprises that for the glass disc of splendid attire oil film to be measured (5) and universal stage (7), described glass disc (5) is fixed on the universal stage (7);
Two ends, the left and right sides, described load load maintainer framework I below are fixed on the horizontal linear guide rail (6), and horizontal linear guide rail (6) is fixed on the framework II of load measurement mechanism.
4. according to each described device of claim 1～3, it is characterized in that: described load measurement mechanism comprises framework II, microscope (10), ccd sensor (8) and three-dimensional working platform (9),
Place microscope (10) under the universal stage (7), microscope (10) is fixed on the three-dimensional working platform (9), microscope (10) bottom connects ccd sensor (8), and described ccd sensor (8) is used for the interference image digitized processing is shown in computing machine.
5. device according to claim 3, it is characterized in that: described universal stage (7) is adjustable rotating speed electric rotary table.
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| CN201310109257.6A CN103234466B (en) | 2013-03-30 | 2013-03-30 | A kind of oil film thickness measurement mechanism |
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| CN201310109257.6A CN103234466B (en) | 2013-03-30 | 2013-03-30 | A kind of oil film thickness measurement mechanism |
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| CN103234466B CN103234466B (en) | 2015-12-23 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111051A (en) * | 2014-07-08 | 2014-10-22 | 华中科技大学 | Device for measuring thickness of oil film between rolling linear guide rail and damper |
| 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 |
| CN106873638A (en) * | 2017-02-17 | 2017-06-20 | 南通大学 | Double testing head Automatic Alignment System based on laser displacement sensor |
| CN107228629A (en) * | 2017-07-17 | 2017-10-03 | 青岛理工大学 | High-pair-contact variable-slip-ratio oil film thickness and friction force simultaneous measurement simulation device |
| CN107993592A (en) * | 2017-11-16 | 2018-05-04 | 浙江威克特广告有限公司 | A kind of production method of luminescent characters |
| CN108709584A (en) * | 2018-01-23 | 2018-10-26 | 四川大学 | It is a kind of to measure thickness of liquid film and the device and method of hydrodynamics behavior in falling liquid film microchannel using stereomicroscope |
| CN109186473A (en) * | 2018-09-06 | 2019-01-11 | 常州大学 | Sliding rolling operating condition lower roller friction secondary oil film thickness and oil film co-moving coordinate test device |
| CN110360977A (en) * | 2018-04-11 | 2019-10-22 | 长春理工大学 | A kind of silicon wafer eccentric testing chucking mechanism |
| CN111337653A (en) * | 2020-03-24 | 2020-06-26 | 大连海事大学 | Resistance method double-point contact friction analyzer |
| CN112964184A (en) * | 2021-04-12 | 2021-06-15 | 西华大学 | Oil film thickness measuring device and measuring method based on surface friction resistance experiment |
| CN116086332A (en) * | 2023-04-10 | 2023-05-09 | 山东裕东汽车零部件有限公司 | Multifunctional brake disc detection tool |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111051B (en) * | 2014-07-08 | 2016-08-17 | 华中科技大学 | A kind of measure the device of oil film thickness between rolling linear guide and antivibrator |
| CN104111051A (en) * | 2014-07-08 | 2014-10-22 | 华中科技大学 | Device for measuring thickness of oil film between rolling linear guide rail and damper |
| 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 |
| CN106873638B (en) * | 2017-02-17 | 2020-11-10 | 南通大学 | Double-measuring-head automatic alignment system based on laser displacement sensor |
| CN106873638A (en) * | 2017-02-17 | 2017-06-20 | 南通大学 | Double testing head Automatic Alignment System based on laser displacement sensor |
| CN107228629A (en) * | 2017-07-17 | 2017-10-03 | 青岛理工大学 | High-pair-contact variable-slip-ratio oil film thickness and friction force simultaneous measurement simulation device |
| CN107228629B (en) * | 2017-07-17 | 2023-06-30 | 青岛理工大学 | High pair contact sliding-rolling ratio oil film thickness and friction force simultaneous measurement simulation device |
| CN107993592A (en) * | 2017-11-16 | 2018-05-04 | 浙江威克特广告有限公司 | A kind of production method of luminescent characters |
| CN108709584B (en) * | 2018-01-23 | 2021-04-02 | 四川大学 | Method for measuring liquid phase film forming thickness and hydromechanics behavior in falling film microchannel |
| CN108709584A (en) * | 2018-01-23 | 2018-10-26 | 四川大学 | It is a kind of to measure thickness of liquid film and the device and method of hydrodynamics behavior in falling liquid film microchannel using stereomicroscope |
| CN110360977A (en) * | 2018-04-11 | 2019-10-22 | 长春理工大学 | A kind of silicon wafer eccentric testing chucking mechanism |
| CN109186473A (en) * | 2018-09-06 | 2019-01-11 | 常州大学 | Sliding rolling operating condition lower roller friction secondary oil film thickness and oil film co-moving coordinate test device |
| CN111337653A (en) * | 2020-03-24 | 2020-06-26 | 大连海事大学 | Resistance method double-point contact friction analyzer |
| CN111337653B (en) * | 2020-03-24 | 2022-04-01 | 大连海事大学 | Resistance method double-point contact friction analyzer |
| CN112964184A (en) * | 2021-04-12 | 2021-06-15 | 西华大学 | Oil film thickness measuring device and measuring method based on surface friction resistance experiment |
| CN112964184B (en) * | 2021-04-12 | 2022-07-01 | 西华大学 | Oil film thickness measuring device and measuring method based on surface friction resistance experiment |
| CN116086332A (en) * | 2023-04-10 | 2023-05-09 | 山东裕东汽车零部件有限公司 | Multifunctional brake disc detection tool |
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