CN107607049A - A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device - Google Patents
A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device Download PDFInfo
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- CN107607049A CN107607049A CN201710645576.7A CN201710645576A CN107607049A CN 107607049 A CN107607049 A CN 107607049A CN 201710645576 A CN201710645576 A CN 201710645576A CN 107607049 A CN107607049 A CN 107607049A
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Abstract
A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device, including signal generating module, test module, signal receiving module and data processing module；Test module includes shade, quartz plate, the output optical fiber port of export and incident optical collection terminal；The test module is installed in the hole of piston-cylinder, vertical with inboard wall of cylinder liner；Quartz plate is installed in shade, and quartz plate is bonded with the output optical fiber port of export and incident optical collection terminal；Signal generating module includes laser generator, focus lamp and signal acquisition terminal；The signal acquisition terminal is connected with the output optical fiber port of export；Signal receiving module includes incident optical and spectroanalysis instrument；Incident optical is connected with incident optical collection terminal, and is connected with spectroanalysis instrument；Spectroanalysis instrument is connected by data line with data processing module.The spectroscopic assay piston-ring packing oil film thickness that the inventive method reflects to obtain using laser by piston ring oil film, fast response time, high sensitivity measurement accuracy are high.
Description
Technical field
The invention belongs to field of power machinery, and in particular to a kind of internal-combustion engine piston ring component lubrication oil film thickness measurement dress
Put.
Background technology
In view of economy and reliability requirement, people are in IC engine cylinder interior sealing, power loss, lubrication oil consumption, cylinder
The friction problem such as gas leakage and component wear is more and more paid close attention to.Moreover, international increasingly strict Abgasgesetz and use
The interests demand at family all promotes lube use rate in cylinder constantly to reduce.These above-mentioned friction problems all with piston ring-cylinder liner
There is close relationship.
Between in the past few decades, domestic and international many scholars are carried out to the piston ring and cylinder jacket lubrication problem of internal combustion engine
Substantial amounts of research, significant achievement is all achieved in terms of experiment and theoretical research, but surveyed for the oil film thickness of internal combustion engine
The experimental work development of examination is relatively slow.
Yang Xiao is in Master's thesis《The research of ultrasonic film thickness measuring method and measuring system》In, describe ultrasound in detail
The method and measurement apparatus of oil film thickness, ultrasonic method also have the shortcomings that certain, such as：Lateral resolution is relatively low, and it is detected
Speed is relatively slow, therefore when oil film thickness change is very fast, the application of this method is restricted.Oil film is measured using supercritical ultrasonics technology
Thickness is more suitable for applying in the oil film environment of geo-stationary, such as sliding bearing.
The cleer and peaceful Dong Fu product in Tsing-Hua University Yu sea exist《With capacitance method to Engine Cam-tappet pair Dynamic Elastohydrodynamic Lubrication oil film
The test of thickness》The middle oil film thickness secondary to Engine Cam-tappet using capacitance method is tested, but this method is not
Suitable for measured thin film, because the micro-bulge of metal surface can cause short circuit, so as to influence measurement accuracy.
Yuan in Chinese utility model patent CN202522201U, is detected interior into clear et al. using laser displacement sensor
Oil film thickness between combustion engine piston ring-cylinder liner friction pair, laser displacement sensor is arranged in the middle part of cylinder sleeve to detect
The oil film at front and rear two moment is displaced through CCD imaging techniques after over-focusing and converts electric signal by all piston rings, laser
For the oil film thickness information of measuring point.But because CCD manufacturing process is complicated, cost is higher, therefore it is difficult to be widely used.
The development of optical method overcomes many shortcomings of electric method, and representational method is laser inductive fluorescence method.But
Because the life-span of fluorescence is with excitating light strength about, it is necessary to especially careful in the selection of light intensity and signal post-processing link；Separately
Outside, it is also affected by temperature to a certain extent, and temperature compensation difficult；Further, the condition and fluorescent material of reflecting surface
The factor such as oxidation resistance also all have impact on measurement accuracy to a certain extent.
The content of the invention
It is an object of the invention to provide a kind of measurement accuracy height, fast response time, the simple internal combustion engine of testing procedure to live
Plug ring component lubrication oil film thickness measurement device.
The object of the present invention is achieved like this, including：Signal generating module, test module, signal receiving module sum
According to processing module；
Test module includes shade, quartz plate, the output optical fiber port of export and incident optical collection terminal；The test module
It is installed in the hole of piston-cylinder, it is vertical with inboard wall of cylinder liner；The quartz plate is installed in shade close to inboard wall of cylinder liner side,
Quartzy chip size matches with shade inside dimension, and the outer surface and inboard wall of cylinder liner of quartz plate are coplanar, the inner side table of quartz plate
Face is bonded with the cross section of the output optical fiber port of export and incident optical collection terminal；The output optical fiber port of export and incident optical collection terminal
Radially it is placed in side by side along shade inside shade, there is gap between shade, and perpendicular to the inner surface of quartz plate；
Signal generating module includes laser generator, focus lamp and signal acquisition terminal；The laser head of the laser generator
The laser sent is focused by focus lamp, and the laser signal after focusing is acquired by signal acquisition terminal；The signal
Collection terminal is connected by the output optical fiber with the output optical fiber port of export；
Signal receiving module includes incident optical and spectroanalysis instrument；Incident optical is connected with incident optical collection terminal, and
It is connected with spectroanalysis instrument；Spectroanalysis instrument is connected by data line with data processing module.
The present invention can also include：
1. the gap between the output optical fiber port of export, incident optical collection terminal and shade is filled with filler.
2. the shade cross section is ellipse, the diameter sum of the output optical fiber port of export and incident optical collection terminal with
Transverse equal length on the inside of shade cross section.
3. the diameter of section of the output optical fiber port of export is less than the diameter of section of incident optical collection terminal；The emergent light
The equal length that the fine port of export and incident optical collection terminal is stretched into inside shade.
The present invention has the advantages that：
1. the inventive method is lubricated using the spectroscopic assay piston-ring packing for reflecting to obtain by piston ring oil film of laser
Oil film thickness, fast response time, high sensitivity.Compared with existing laser inductive fluorescence method, the present invention is not by the shadow of fluorescent material
Ring, greatly reduce measurement error, improve the operability of test.
2. the present invention can directly receive reflection laser, the introduction volume of test error is reduced.
3. the medium that the present invention is connected using optical fiber as light path, it can effectively avoid the light intensity loss of laser signal.
4. the present invention carries out shading treatment using shade to measurand, its remaining light in test environment can be prevented
Disturbed caused by strong signal, improving measurement accuracy.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is test module schematic view of the mounting position of the present invention；
Fig. 3 is test module structural representation of the present invention；
Fig. 4 is test module cross-sectional view of the present invention.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
With reference to Fig. 1 and Fig. 2, the present invention provides a kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device, including：
Signal generating module, test module, signal receiving module and data processing module；
Test module includes shade 4, quartz plate 5, the output optical fiber port of export 6 and incident optical collection terminal 7；The test
Module is installed in the hole of cylinder sleeve 2 of piston 1, vertical with the inwall of cylinder sleeve 2；The quartz plate 5 is installed in shade 4 close to cylinder
2 inwall sides are covered, the size of quartz plate 5 matches with the inside dimension of shade 4, and the outer surface and the inwall of cylinder sleeve 2 of quartz plate 5 are coplanar
And pasted with piston ring contact, inner surface and the cross section of the output optical fiber port of export 6 and incident optical collection terminal 7 of quartz plate 5
Close；The output optical fiber port of export 6 and incident optical collection terminal 7 are placed in inside shade 4 along the radial direction of shade 4 side by side, with shade 4
Between have gap, and perpendicular to the inner surface of quartz plate 5；
Signal generating module includes laser generator, focus lamp and signal acquisition terminal；The laser head of the laser generator
The laser sent is focused by focus lamp, and the laser signal after focusing is acquired by signal acquisition terminal；The signal
Collection terminal is connected by the output optical fiber with the output optical fiber port of export 6；
Signal receiving module includes incident optical and spectroanalysis instrument；Incident optical is connected with incident optical collection terminal 7, and
It is connected with spectroanalysis instrument；Spectroanalysis instrument is connected by data line with data processing module.
Gap filler 8 between the output optical fiber port of export 6, incident optical collection terminal 7 and shade 4 is filled.
The cross section of shade 4 is the diameter sum of ellipse, the output optical fiber port of export 6 and incident optical collection terminal 7
With the inner side transverse equal length of shade 4.
The diameter of section of the output optical fiber port of export 6 is less than the diameter of section of incident optical collection terminal 7；The emergent light
The equal length that the fine port of export 6 and incident optical collection terminal 7 are stretched into inside shade.
With reference to Fig. 2~Fig. 4, the output optical fiber port of export 6 is parallel to each other and contacted with incident optical collection terminal 7, and utilizes and fill out
Material 8 is fixed in shade 4, and filler 8 should possess two functions：When good shading performance, second, not influenceing emergent light
Good contact between the fine port of export 6, incident optical collection terminal 7 and quartz plate 5.Quartz plate 5 is embedded in the bottom of shade 4,
The output optical fiber port of export 6, incident optical collection terminal 7 and the perpendicular contact of quartz plate 5 and contact good.In addition, with reference to figure three, to protect
Card quartz plate 5, shade 4, be brought into close contact between cylinder sleeve 2, using interference fit between three, and for ensure quartz plate 5 with
Shade 4 does not interfere with normally forming for piston ring oil film, after quartz plate 5 is installed in cylinder sleeve with shade 4, will carry out
Milled processed, to ensure that process of lapping quartz plate 5, shade 4 will not rotate, quartz plate 5 is processed into shade 4 and cut
Face form is oval cylinder ring.
To ensure that incident optical 7 can preferably receive reflection laser, the diameter of incident optical collection terminal 7 should be slightly bigger than outgoing
The diameter of fiber outlet end 6, and to facilitate installation, the output optical fiber port of export 6 should be with screening with the diameter sum of incident optical collection terminal 7
The inner side transverse of the ring of light 4 is equal.
Test module erection sequence of the present invention is as follows, and quartz plate 5 is embedded in into shade 4 first, and ensures to be brought into close contact, its
It is secondary section is processed into smooth incident optical collection terminal 6 and the output optical fiber port of export 7 to be put into shade, ensure two optical fiber ends
Portion and the good fit of quartz plate 5, are then filled with filler 8, completion assembled above finally are partially embedded into cylinder sleeve 2
In.After installation, quartz plate in cylinder 5 and shade 4 are ground, until quartz plate 5, shade 4, the inner surface of cylinder sleeve 2
Between without projection, no depression.Then by the incident optical collection terminal 7 outside cylinder sleeve 2, it is connected in spectroanalysis instrument, utilizes data
Transmission line is again handled the data transfer in spectroanalysis instrument into computer.
Laser generator is using tunable semiconductor laser generator as signal source.This type laser generator can
Using sawtooth current control mode, the function that initial beam intensity is converted into cycle sawtooth wave function is realized；Laser generator
The laser that laser head is sent is focused by focus lamp, and condenser is incorporated into the generation mouth position of laser generator with laser head
Put；Laser signal after focusing is transferred to the position of the Cylinder Liner-piston Ring friction pair of tested diesel engine by the output optical fiber.Laser
Beam spot diameter is less than the diameter of launching fiber, ensures that the loss of laser signal is reduced to minimum.
Test module, main arrival end, quartz glass and shading element including the output optical fiber port of export and incident optical.
Quartz plate is made in quartz glass, and shading element is preferably shade.The output optical fiber port of export and incident optical arrival end all need with
Transparent quartz glass fits, and laser signal transmits through the output optical fiber, penetrates quartz glass and reaches measured surface, through being tested table
Face is reflected, and after penetrating quartz glass again, is collected and is transmitted to signal collection module by incident optical；To ensure internal combustion engine in work
Sealing during work, quartz glass, shade are assembled with tested internal combustion engine cylinder jacket using interference fit；It is simultaneously
The integrality and continuity of oil film between guarantee piston ring-cylinder liner, are ground processing to quartz glass and shade, make its wheel
Exterior feature is consistent with inboard wall of cylinder liner face.
Signal receiving module, including incident optical and spectroanalysis instrument.Incident optical one end and quartz glass perpendicular contact
And reflection laser is received, the other end is connected with spectroanalysis instrument, for receiving the laser signal that incident optical collects, utilizes
Spectroanalysis instrument carries out Intensity Analysis to signal, and passes to data processing module by data line.Signal receiving module
Analysis light intensity data is transferred to computer and is further analyzed and handles, and obtains final thickness data.
To determine the affiliated piston ring of any time oil film thickness, measurand can be handled as follows：Before starting measurement,
Tested cylinder inner carrier is adjusted to top dead center position, and keeps the position, using the position as measurement starting position, and root
The oil film thickness of any point is determined according to the geometrical relationship between the piston, piston ring, bent axle of specific measurement object and movement relation
Affiliated piston ring position.
Claims (5)
1. a kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device, including：Signal generating module, test module, letter
Number receiving module and data processing module；Characterized in that, test module includes shade, quartz plate, the output optical fiber port of export
With incident optical collection terminal；The test module is installed in the hole of piston-cylinder, vertical with inboard wall of cylinder liner；The quartz plate peace
Matched loaded on close inboard wall of cylinder liner side, quartzy chip size in shade with shade inside dimension, the outer surface of quartz plate
Coplanar with inboard wall of cylinder liner, the inner surface of quartz plate is bonded with the cross section of the output optical fiber port of export and incident optical collection terminal；
The output optical fiber port of export and incident optical collection terminal are radially placed in inside shade along shade side by side, between having between shade
Gap, and perpendicular to the inner surface of quartz plate；
Signal generating module includes laser generator, focus lamp and signal acquisition terminal；The laser head of the laser generator is sent out
The laser gone out is focused by focus lamp, and the laser signal after focusing is acquired by signal acquisition terminal；The signal acquisition
End is connected by the output optical fiber with the output optical fiber port of export；
Signal receiving module includes incident optical and spectroanalysis instrument；Incident optical is connected with incident optical collection terminal, and with light
Spectrum analyzer is connected；Spectroanalysis instrument is connected by data line with data processing module.
A kind of 2. internal-combustion engine piston ring component lubrication oil film thickness measurement device as claimed in claim 1, it is characterised in that institute
Filled with filler in the gap stated between the output optical fiber port of export, incident optical collection terminal and shade.
3. a kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device as claimed in claim 1 or 2, its feature exist
In the shade cross section is the diameter sum and shade of ellipse, the output optical fiber port of export and incident optical collection terminal
Transverse equal length on the inside of cross section.
4. a kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device as claimed in claim 1 or 2, its feature exist
In the diameter of section of the output optical fiber port of export is less than the diameter of section of incident optical collection terminal；The output optical fiber outlet
The equal length that end and incident optical collection terminal are stretched into inside shade.
A kind of 5. internal-combustion engine piston ring component lubrication oil film thickness measurement device as claimed in claim 3, it is characterised in that institute
The diameter of section for stating the output optical fiber port of export is less than the diameter of section of incident optical collection terminal；The output optical fiber port of export and enter
Penetrate the equal length that collecting fiber end is stretched into inside shade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710645576.7A CN107607049A (en) | 2017-08-01 | 2017-08-01 | A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710645576.7A CN107607049A (en) | 2017-08-01 | 2017-08-01 | A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN107607049A true CN107607049A (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710645576.7A Pending CN107607049A (en) | 2017-08-01 | 2017-08-01 | A kind of internal-combustion engine piston ring component lubrication oil film thickness measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048898A (en) * | 2021-04-21 | 2021-06-29 | 北京理工大学 | Nonlinear fluorescent dyeing film thickness measurement calibration method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707038A (en) * | 2012-06-28 | 2012-10-03 | 青岛理工大学 | Method for measuring bearing capacity of lubricating oil film of miniature slide block bearing |
| CN202522201U (en) * | 2011-11-30 | 2012-11-07 | 武汉理工大学 | Device for detecting oil film thickness between cylinder liner and piston ring for diesel engine |
| CN103438814A (en) * | 2013-08-29 | 2013-12-11 | 中国科学院工程热物理研究所 | Optical fiber measurement method and device of blade tip clearance |
| 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 |
-
2017
- 2017-08-01 CN CN201710645576.7A patent/CN107607049A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202522201U (en) * | 2011-11-30 | 2012-11-07 | 武汉理工大学 | Device for detecting oil film thickness between cylinder liner and piston ring for diesel engine |
| CN102707038A (en) * | 2012-06-28 | 2012-10-03 | 青岛理工大学 | Method for measuring bearing capacity of lubricating oil film of miniature slide block bearing |
| CN103438814A (en) * | 2013-08-29 | 2013-12-11 | 中国科学院工程热物理研究所 | Optical fiber measurement method and device of blade tip clearance |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048898A (en) * | 2021-04-21 | 2021-06-29 | 北京理工大学 | Nonlinear fluorescent dyeing film thickness measurement calibration method |
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Application publication date: 20180119 |