CN110174184A - A method of bearing bush temperature field is measured using Fiber Bragg Grating technology - Google Patents
A method of bearing bush temperature field is measured using Fiber Bragg Grating technology Download PDFInfo
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- CN110174184A CN110174184A CN201910277416.0A CN201910277416A CN110174184A CN 110174184 A CN110174184 A CN 110174184A CN 201910277416 A CN201910277416 A CN 201910277416A CN 110174184 A CN110174184 A CN 110174184A
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
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Abstract
The present invention devises a kind of method using Fiber Bragg Grating technology measurement bearing bush temperature field, fiber grating temperature sensor is mounted on bearing shell, measuring signal is transmitted to fiber Bragg grating (FBG) demodulator by optical fiber, electric signal will be changed into after optical signal prosessing, electric signal is transmitted in computer, and temperature value at measuring point is obtained after computer disposal., high sensitivity small in size using fiber-optic grating sensor, the installation position feature close apart from bearing shell surface, can measure bearing shell surface temperature in real time, comprehensively, for monitoring bearing bush temperature, guarantee that equipment safety reliability service provides a kind of effective monitoring method.Measuring device and method are suitable for the monitoring of machine driven system sliding bearing operating condition, are particularly suitable for marine shafting.
Description
Technical field
The invention belongs to drive apparatus technical field of temperature measurement more particularly to a kind of use Fiber Bragg Grating technology to measure axis
The method in watt temperature field.
Background technique
Can sliding bearing be a kind of component being used widely in electromechanical equipment, transmission system, normal, reliable
Can work is directly related to whole equipment, system work.Thrust bearing (also known as thrust bearing), spring bearing are (also known as intermediate
Bearing) be sliding bearing two kinds of typical structure types, thrust bearing is used to bear the thrust or pulling force of transmission shaft transmitting, intermediate
Bearing is used to bear the gravity of transmission shaft and component mounted thereto.Thrust ring in thrust bearing on thrust axis and it is mounted on shell
Thrust bearing shoe on body is friction pair, the shaft part in intermediate bearing and be mounted on shell support bearing shell be a pair of of friction
Pair, these two pair friction is secondary generally cooling using lubricating oil and lubricates.When equipment works, lubricating oil forms one layer of lubrication between friction pair
Oil film guarantees that friction is secondary and works normally.If certain reason causes oil film temperature to increase or can not form lubricating oil film, will cause
Bearing bush temperature is ramping up, and when the temperature that its temperature is born higher than bush material, just will appear bearing shell scaling loss, equipment downtime
Failure.
Previous people usually install thermosensitive type sensor measurement bearing bush temperature in back of bearing to detect bearing shell surface temperature
It is whether normal.This mode has the disadvantage in that 1) size sensor is larger, 4 to 6 sensors is generally installed, to bearing shell temperature
Degree carries out local measurement, cannot detect the temperature conditions of entire bearing shell, there is " blind area ".2) since size sensor is larger,
The aperture of bearing shell surface and destroy oil film, therefore sensor is generally by being mounted in bearing shell by sensor in watt back aperture, this
The probe of a little sensors cannot directly contact 2 millimeters or so generally under bearing shell surface with bearing shell, by measurement bearing shell and pass
Oil temperature between sensor obtains bearing shell surface temperature indirectly, and measurement result is not very accurate.3) thermal sensitivity transducer sensitivity compared with
It is low, the variation of oil film temperature cannot be accurately obtained in real time.It therefore, to guarantee bearing safe and reliable operation, while being bearing bush
Investigation of materials provides help, needs to obtain bearing shell real-time temperature field using a kind of novel measurement method.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of sides using Fiber Bragg Grating technology measurement bearing bush temperature field
Method, high sensitivity small in size using fiber-optic grating sensor, the installation position feature close apart from bearing shell surface can in real time, entirely
Planar survey bearing shell surface temperature for monitoring bearing bush temperature, guarantees that equipment safety reliability service provides a kind of effective monitoring side
Method.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of using Fiber Bragg Grating technology measurement axis
The method in watt temperature field, this approach includes the following steps, and step 1, fiber grating temperature sensor is mounted on bearing shell, measurement
Signal is transmitted to fiber Bragg grating (FBG) demodulator by optical fiber；Step 2 will be changed into electric signal after optical signal prosessing；Step 3, electricity
Signal is transmitted in computer, obtains temperature value at measuring point after after computer disposal and suitably correcting.
According to the above technical scheme, in the step 1, fiber grating temperature sensor is before being mounted on bearing shell, by optical fiber
Grating temperature sensor is fitted into the copper pipe of a diameter 0.5mm~1.5mm, and heat-conducting cream is full of in copper pipe.
According to the above technical scheme, in the step 1, bearing shell surface open up (according to point layout needs) width 1mm~
The groove (considering that bearing shell has the abrasion loss of 1mm or so in use) of 2mm, depth 1mm~2mm, will be equipped with optical fiber grating temperature
The copper pipe of sensor is put into groove；Finally in flute surfaces teeming ZSnSb11Cu6 material.And to bearing shell figuring of surface, guarantee
Its surface quality.
According to the above technical scheme, in the step 3, fiber grating temperature sensor is using temperature to raster center wavelength
Influence, by measure grating wavelength variable quantity obtain measurement temperature change, it can be obtained at this compared with initial value
Temperature, the wavelength variable quantity Δ λ of gratingB2It may be expressed as:
ΔλB2=KT·λB·ΔT
In formula: Δ λB2The variation of fiber grating temperature sensor central wavelength；
KTFiber bragg grating center wavelength variation with temperature coefficient is a constant；
λBRetroreflection Prague optical wavelength of incident light wave in free space；
Δ T- variation of ambient temperature amount；
The center wavelength variation that temperature sensor is fed back to is obtained using fiber Bragg grating (FBG) demodulator, after calculating, is obtained
The changing value of temperature at this.
According to the above technical scheme, in the step 1, an optical fiber is arranged at interval of 10mm on the optical fiber of diameter 0.1mm
Grating temperature sensor.Therefore, a temperature sensors up to a hundred can be arranged on a bearing shell, after the processing to measurement data
Obtain bearing bush temperature field.
The beneficial effect comprise that: small in size, high sensitivity, installation position distance using fiber-optic grating sensor
The close feature in bearing shell surface can measure bearing shell surface temperature in real time, comprehensively, for monitoring bearing bush temperature, guarantee that equipment safety can
A kind of effective monitoring method is provided by operation.Measuring device and method are suitable for machine driven system sliding bearing and run feelings
The monitoring of condition is particularly suitable for marine shafting.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is that thrust bearing measurement bearing shell surface temperature field principal diagram is intended in the embodiment of the present invention；
Fig. 2 is that spring bearing measurement bearing shell surface temperature field principal diagram is intended in the embodiment of the present invention；
Fig. 3 is that fiber grating temperature sensor inlays bearing shell schematic surface in the embodiment of the present invention；
Fig. 4 is thrust bearing shoe fiber grating temperature sensor arrangement schematic diagram in the embodiment of the present invention；
Fig. 5 is support bearing shell fiber grating temperature sensor arrangement schematic diagram in the embodiment of the present invention.
In figure, 1-fiber grating temperature sensor, 2-fine grating demodulation instrument, 3-computers, 4-optical fiber, 5-cables,
6- heat-conducting cream, 7- bearing shell, 8- copper pipe, 9- bearing alloy, axis -10.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
A kind of method using Fiber Bragg Grating technology measurement bearing bush temperature field is provided in the embodiment of the present invention, this method includes
Following steps, step 1, fiber grating temperature sensor 1 are mounted on bearing shell 7, and measuring signal is transmitted to optical fiber by optical fiber 4
Grating demodulation instrument 2；Step 2, fiber Bragg grating (FBG) demodulator 2 will be changed into electric signal after optical signal prosessing；Step 3, electric signal are logical
It crosses cable 5 to be transmitted in computer 3, obtains temperature value at measuring point after the processing of computer 3.Fiber grating temperature sensor 1 is being pacified
It goes forward mounted in bearing shell 7, fiber grating temperature sensor is fitted into the copper pipe 8 of a diameter 0.5mm~1.5mm, and in copper pipe 8
In be full of HY880 type heat-conducting silicone grease 6.Width 1mm~2mm, depth 1mm~2mm are opened up (according to point layout needs) on 7 surface of bearing shell
Groove (considering that bearing shell has the abrasion loss of 1mm or so in use), the copper pipe 8 of fiber grating temperature sensor 1 will be housed
It is put into groove；Last teeming top bearing shell alloy (ZSnSb11Cu6) 9 in the trench, teeming bearing alloy (ZSnSb11Cu6) 9
When should control temperature no more than 300 DEG C.To 7 reconditioning of bearing shell surface after teeming, guarantee that the thick illumination of its surface quality is not more than
0.1mm.It is noted that optical fibre optical fibre grating temperature sensor 1 on bearing shell 7 when arranging to guarantee measuring signal quality
It should not be bent as far as possible, if its bending radius should be not less than 10mm when inevitable.
As shown in attached drawing 1, attached drawing 2, measuring device is by fiber grating temperature sensor 1, fiber Bragg grating (FBG) demodulator 2, calculating
The composition such as machine 3 and optical fiber 4, cable 5.Wherein, fiber grating temperature sensor 1 is embedded in 7 table of bearing shell in the way of attached drawing 3
Face, according to 7 specific size of bearing shell and measurement request, by the requirement of each not small 10mm of 1 spacing of fiber grating temperature sensor, cloth
It sets under 7 surface of bearing shell at 1mm~2mm, and the position of fluting insertion sensor on bearing shell surface 7 is filled out again
ZSnSb11Cu6 material 9 guarantees that bearing shell surface is smooth, and attached drawing 4 and attached drawing 5 give two kinds of bearing shell of monolithic thrust bearing shoe and support
The arrangement of typical bearing shell surface temperature sensor.Friction generates heat with bearing shell 7 when axis 10 rotates, and keeps bearing shell surface 7 warm
Degree increases, and temperature increases the grating space changed inside temperature sensor 1, makes wherein cardiac wave is long to change, from optical fiber light
In a branch of broadband light entrance channel fiber grating temperature sensor 1 that grid (FBG) demodulator 2 issues, raster center wavelength change causes certain spy
The long light of standing wave is reflected back toward fiber Bragg grating (FBG) demodulator 2, and fiber Bragg grating (FBG) demodulator obtains in grating reflecting light frequency analysis
Cardiac wave is long, to obtain its corresponding temperature value, which passes through cable as electronic signals and be transmitted in computer 3,
Computer combines measuring point temperature value each on bearing shell with point layout position, obtains real-time bearing shell surface temperature field.
Since fiber grating temperature sensor 1 is embedded under 7 surface of bearing shell, measurement temperature and bearing shell surface are practical
Temperature is poor there are the regular hour, and the two slightly has difference, needs to measure temperature to it and suitably be corrected.Its modification method are as follows:
1) acceleration or thrust increased temperature rise period are run in equipment, 7 surface actual temperature of bearing shell is that measurement temperature increases by 10 DEG C~15
℃；2) equipment run slow down or thrust decline temperature-fall period, 7 surface actual temperature of bearing shell be measurement temperature reduce 7 DEG C~
12℃；If equipment operating condition does not change stable operation, temperature need not be modified.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of method using Fiber Bragg Grating technology measurement bearing bush temperature field, which is characterized in that this approach includes the following steps,
Step 1, fiber grating temperature sensor are mounted on bearing shell, and measuring signal is transmitted to fiber Bragg grating (FBG) demodulator by optical fiber；Step
Rapid two, electric signal will be changed into after optical signal prosessing；Step 3, electric signal are transmitted in computer, are obtained after computer disposal
Temperature value at measuring point.
2. the method according to claim 1 using Fiber Bragg Grating technology measurement bearing bush temperature field, which is characterized in that described
In step 1, fiber grating temperature sensor is packed into a diameter before being mounted on bearing shell, by fiber grating temperature sensor
In the copper pipe of 0.5mm~1.5mm, and heat-conducting cream is full of in copper pipe.
3. the method according to claim 1 or 2 using Fiber Bragg Grating technology measurement bearing bush temperature field, which is characterized in that
In the step 1, the groove of wide 1mm~2mm, depth 1mm~2mm are opened up on bearing shell surface, fiber grating temperature sensor will be housed
The copper pipe of device is put into groove；Finally in flute surfaces teeming with primitive axis watt identical material.
4. the method according to claim 3 using Fiber Bragg Grating technology measurement bearing bush temperature field, which is characterized in that described
In step 3, fiber grating temperature sensor utilizes influence of the temperature to raster center wavelength, and the wavelength by measuring grating becomes
Change amount obtains measurement temperature change, it can be obtained to the temperature at this, the wavelength variable quantity Δ λ of grating compared with initial valueB2
It may be expressed as:
ΔλB2=KT·λB·ΔT
In formula: Δ λB2The variation of fiber grating temperature sensor central wavelength；
KTFiber bragg grating center wavelength variation with temperature coefficient is a constant；
λBRetroreflection Prague optical wavelength of incident light wave in free space；
Δ T- variation of ambient temperature amount；
The center wavelength variation that temperature sensor is fed back to is obtained using fiber Bragg grating (FBG) demodulator, after calculating, is obtained at this
The changing value of temperature.
5. the method according to claim 1 using Fiber Bragg Grating technology measurement bearing bush temperature field, which is characterized in that described
In step 1, a fiber grating temperature sensor is arranged at interval of 10mm on the optical fiber of diameter 0.1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277416.0A CN110174184A (en) | 2019-04-08 | 2019-04-08 | A method of bearing bush temperature field is measured using Fiber Bragg Grating technology |
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| CN201910277416.0A CN110174184A (en) | 2019-04-08 | 2019-04-08 | A method of bearing bush temperature field is measured using Fiber Bragg Grating technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067155A (en) * | 2020-11-11 | 2020-12-11 | 武汉昊衡科技有限公司 | Lithium battery temperature dynamic monitoring method based on OFDR |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201322685Y (en) * | 2008-12-26 | 2009-10-07 | 温平 | Bearing and bush operation safety detecting device |
| DE102009039259A1 (en) * | 2009-08-28 | 2011-03-03 | Sms Siemag Ag | Monitoring of roller bearings |
| CN202522340U (en) * | 2012-03-29 | 2012-11-07 | 东华大学 | Fiber grating high-temperature sensing system |
| CN107036732A (en) * | 2016-12-28 | 2017-08-11 | 西安建筑科技大学 | Sliding bearing lubricating oil film thickness and the fibre optical sensor of temperature can be detected simultaneously |
| CN108572009A (en) * | 2018-04-23 | 2018-09-25 | 武汉理工大学 | Bush(ing) bearing bearing bush temperature field and pressure field test platform and measurement method |
-
2019
- 2019-04-08 CN CN201910277416.0A patent/CN110174184A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201322685Y (en) * | 2008-12-26 | 2009-10-07 | 温平 | Bearing and bush operation safety detecting device |
| DE102009039259A1 (en) * | 2009-08-28 | 2011-03-03 | Sms Siemag Ag | Monitoring of roller bearings |
| CN202522340U (en) * | 2012-03-29 | 2012-11-07 | 东华大学 | Fiber grating high-temperature sensing system |
| CN107036732A (en) * | 2016-12-28 | 2017-08-11 | 西安建筑科技大学 | Sliding bearing lubricating oil film thickness and the fibre optical sensor of temperature can be detected simultaneously |
| CN108572009A (en) * | 2018-04-23 | 2018-09-25 | 武汉理工大学 | Bush(ing) bearing bearing bush temperature field and pressure field test platform and measurement method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067155A (en) * | 2020-11-11 | 2020-12-11 | 武汉昊衡科技有限公司 | Lithium battery temperature dynamic monitoring method based on OFDR |
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Application publication date: 20190827 |
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