CN106840673B - Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method - Google Patents
Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method Download PDFInfo
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- CN106840673B CN106840673B CN201710085429.9A CN201710085429A CN106840673B CN 106840673 B CN106840673 B CN 106840673B CN 201710085429 A CN201710085429 A CN 201710085429A CN 106840673 B CN106840673 B CN 106840673B
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Abstract
The present invention relates to a kind of marine diesels to slide base bearing pyroelectric signal caliberating device, it includes industrial computer, programmable logic controller (PLC), servo-driver, data collecting card, motor, front support bearing, rear support bearing, experiment bearing, speed probe, pyroelectric sensor, torque sensor, watt back temperature sensor, lubricating oil temperature sensor, lubricant pressure sensor, hydraulic cylinder, hydraulic oil container, hydraulic pump, grease-box, grease pump, lubricating oil heater, hydrostatic sensor and displacement signal sensor；The present invention uses flexible feedback control strategy, guarantees that lifting revolving speed and adjustment load are steadily excessive, provides test bearing stable variable working condition condition, realize pyroelectric signal dynamic calibration.
Description
Technical field
The present invention relates to Marine Diesels fields, and in particular to a kind of marine diesel sliding base bearing pyroelectric signal
Caliberating device and scaling method.
Background technique
One of main friction pairs as diesel engine, eccentric shaft and base bearing are the key components and parts and rapid wear of diesel engine
Part.Stress is complicated during the motion for eccentric shaft, under periodically variable alternate load effect in diesel engine working cycles,
Base bearing is easy fever and abrasion.The uneven excessive wear of base bearing can make bearing clearance increase again, cause axle journal to master
The impact force of bearing increases, and directly affects the overall work performance of diesel engine；The excessive wear of base bearing also will cause cylinder sleeve, work
The Fast Wearing of plug and piston ring causes combustion chamber combustion gas gas blowby and fuel consumption rate to increase, directly affects the output of diesel engine
Power.Energy loss accounts for the 80% of diesel engine total energy loss caused by statistics show because of friction, wherein because of bearing wear
Caused energy loss accounts for the 50%~60% of diesel engine overall friction power loss.Serious main bearing wear results even in
Eccentric shaft distortion, embrace it is molten fracture and the generation of the serious accidents such as eccentric axle box explosion, can not only bring heavy economic losses, it is heavier
What is wanted is that can bury huge hidden danger to the safe operation of diesel engine.
The method for monitoring diesel engine main bearing state of wear peculiar to vessel at present mainly has oil liquid method, temperature method, vibratory drilling method and answers
The methods of political reform, cannot be real by reasons, these methods such as more, the movable part complicated movements of diesel engines signal driving source
When, accurate, the specific failure base bearing of positioning.Under diesel engine main bearing normal operation situation, there is lubrication between eccentric shaft and bearing shell
Oil film separates, and avoids two kinds of metals and directly contacts, and oil drag generates heat, and bearing bush temperature is caused significantly to increase, and joins
Examine document: Zhu Jun, Yang Jianguo, Sun Bo, Yu Yonghua are monitored in thermo-electric method experimental study [J] of diesel engine main bearing state of wear
Combustion engine engineering, 2014, (04): 79-84. also devises the marine diesel sliding bearing thermo-electrically sensor based on pyroelectric effect,
Eccentric shaft-body thermoelectric force can be drawn and have wear spindle to hold according to pyroelectric signal identification.Due to different pyroelectric sensors
Measurement characteristic it is different, need to demarcate it；The pass of different main shafts and bush material its pyroelectric signal amplitude and abrasion loss
It is disunity, is also demarcated.
Summary of the invention
The purpose of the present invention is to provide a kind of marine diesel sliding base bearing pyroelectric signal caliberating device and calibration sides
Method, the present invention use flexible feedback control strategy, guarantee that lifting revolving speed and adjustment load are steadily excessive, it is steady to provide test bearing
Fixed variable working condition condition, realizes pyroelectric signal dynamic calibration.
In order to solve the above technical problems, a kind of marine diesel sliding base bearing pyroelectric signal calibration dress disclosed by the invention
It sets, which is characterized in that it includes industrial computer, programmable logic controller (PLC), servo-driver, data collecting card, motor, preceding branch
Support bearing, rear support bearing, experiment bearing, speed probe, pyroelectric sensor, torque sensor, watt back temperature sensor, profit
Oil temperature sensor, lubricant pressure sensor, hydraulic cylinder, hydraulic oil container, hydraulic pump, grease-box, grease pump, lubrication
Oil heater, hydrostatic sensor and displacement signal sensor；
Wherein, the signal input part of the signal output end connection programmable logic controller (PLC) of industrial computer, programmable logic
The signal input part of the servo drive control signal output end connection servo-driver of controller, the signal output of servo-driver
The control signal input of end connection motor, the output shaft of motor and the front end of eccentric shaft are fixedly and coaxially connected, and test bearing
The top of the piston rod of hydraulic cylinder is arranged in outer ring, tests and is equipped with lubricating oil temperature sensor and profit in the grease channel of bearing
Lubricating oil pressure sensor, tests and is equipped with a watt back temperature sensor in the bearing shell detection hole of bearing, and torque sensor is mounted on partially
The preceding coax segments of the preceding coax segments of mandrel, eccentric shaft are assemblied in the inner ring of front support bearing, the middle part gearratio of cycloid axle formation of eccentric shaft
It is assemblied in the inner ring of experiment bearing, the rear coax segments of eccentric shaft are assemblied in the inner ring of rear support bearing, after rear coax segments
End is equipped with gear, the speed probe for measuring gear rotational speed is provided on gear, the axle center of gear is fixedly connected with thermoelectricity
The input shaft of sensor, the included photoelectric encoder in pyroelectric sensor inside is for detecting the input shaft of pyroelectric sensor
To obtain the angular signal of eccentric shaft；
The input terminal of the hydraulic pump connects hydraulic oil container, and the output end of hydraulic pump connects upper piston area by upper charge valve
Hydraulic cylinder cavity, the output end of hydraulic pump also connected the hydraulic cylinder cavity of piston lower portion by lower charge valve, set in hydraulic cylinder
There is hydrostatic sensor, experiment bearing is equipped with displacement signal sensor；
The input terminal of grease pump connects grease-box, the input of the output end connection lubricating oil heater of grease pump
End, the output end of lubricating oil heater are respectively connected to front support bearing, rear support bearing and the lubricating oil input port for testing bearing；
The pyroelectric signal input terminal of the signal output end connection data collecting card of the pyroelectric sensor, photoelectric encoder
Signal output end connects the angular signal input terminal of data collecting card, and the signal output end of speed probe connects data collecting card
Tach signal input terminal, lubricating oil temperature sensor signal output end connection data collecting card lubricating oil temperature signal it is defeated
Enter end, the lubricating oil pressure signal input part of the signal output end connection data collecting card of lubricant pressure sensor, watt back temperature
Spend watt back temperature signal input of the signal output end connection data collecting card of sensor, the signal output end of torque sensor
Connect the torque signal input terminal of data collecting card, the hydraulic pressure signal of the signal output end connection data collecting card of hydrostatic sensor
Input terminal, the displacement signal input terminal of the signal output end connection data collecting card of displacement signal sensor；
The control signal input of the hydraulic pump control signal output end connection hydraulic pump of programmable logic controller (PLC), can compile
The control signal input of the grease pump control signal output connection grease pump of journey logic controller.
A kind of marine diesel sliding base bearing pyroelectric signal scaling method using above-mentioned caliberating device, feature exist
In it includes the following steps:
Step 1: programmable logic controller (PLC) controls motor by servo-driver and rotates, and motor drives eccentric shaft turns,
The gap between the middle part gearratio of cycloid axle formation of eccentric shaft and experiment bearing is normal clearance at this time；
Step 2: PLC controls hydraulic pump and grease pump are opened, while programmable logic controller (PLC) control
Lubricating oil heater work processed, at this point, spring bearing, rear support bearing and experiment bearing provide lubricating oil to grease-box forward,
The piston rod of hydraulic cylinder movement, hydraulic cylinder increases specified load at interval of middle part gearratio of cycloid axle formation of the preset time to eccentric shaft, directly
Reach the rated load of eccentric shaft；
Step 3: when the piston rod of hydraulic cylinder reaches the rated load of eccentric shaft to the load that middle part gearratio of cycloid axle formation applies, number
The angle of eccentricity signal of the experiment bearing pyroelectric signal, photoelectric encoder output that are exported according to capture card acquisition pyroelectric sensor,
The experiment bearing oil temperature signal of eccentric shaft tach signal, lubricating oil temperature sensor output that speed probe exports,
The experiment bearing oil pressure signal of lubricant pressure sensor output, the eccentric bearing pad back of watt back temperature sensor output are warm
Spend cylinder hydraulic signal, displacement signal that signal, the eccentric shaft torque signal of torque sensor output, hydrostatic sensor export
The experiment bearing displacement signal of sensor output, and the signal of above-mentioned acquisition is transferred to industrial computer；
Step 4: industrial computer by eccentric shaft tach signal, experiment bearing oil temperature signal, experiment bearing oil
Pressure signal and eccentric shaft torque signal are defeated by programmable logic controller (PLC) respectively with preset adjusting control strategy compared with
The control signal of closed loop out turns round eccentric shaft revolving speed, experiment bearing lubrication oil temperature, experiment bearing lubrication oil pressure and eccentric shaft
Square is stablized on preset value；
Industrial computer identifies each cycle initial time, eccentric shaft turns one week right by analyzing angle of eccentricity signal
A cycle is answered, experiment bearing pyroelectric signal, experiment bearing displacement signal, cylinder hydraulic signal are pressed into periodic segment, obtained
Bearing segmentation pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal are tested, it then will experiment bearing point
Section pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal do and averagely synthesize a cycle paracycle
Experiment bearing pyroelectric signal, experiment bearing displacement signal and cylinder hydraulic signal；
Industrial computer utilizes the several of eccentric shaft and displacement signal sensor by the experiment bearing displacement signal of a cycle
The minimum oil film thickness between the middle part gearratio of cycloid axle formation of eccentric shaft and real axis watt is calculated in what relationship and euler algorithm, and will most
Database, the auxiliary monitoring parameter as eccentric shaft abrasion is written in small oil film thickness and the cylinder hydraulic signal of a cycle；
Industrial computer using the pyroelectric signal amplitude of experiment bearing a cycle as polar radius, draw as angular coordinate by angle of eccentricity
The polar diagram of bearing wear pyroelectric signal, and the maximum value of pyroelectric signal in polar diagram is extracted as pyroelectric signal feature
Property；
Step 5: step-by-step movement increases the gap between the middle part gearratio of cycloid axle formation of eccentric shaft and experiment bearing, until between described
Gap, which reaches, works normally allowed maximal clearance between the middle part gearratio of cycloid axle formation of eccentric shaft and experiment bearing, then according to step
3 obtain the corresponding pyroelectric signal characteristic in each gap with the method for step 4, by each gap and corresponding thermoelectricity feature
Value is mapped, and forms calibration map, i.e. completion marine diesel sliding base bearing pyroelectric signal calibration.
Inventive principle of the invention are as follows:
According to the formation basic theory and feature of friction lubricating film between secondary, lubricating status can be divided into: 1, hydrldynamic pressure lubrication；2,
Hydrostatic lubrication；3, elastic hydrodynamic lubrication；4, boundary lubrication；5, five kinds of fundamental types such as dry condition.For reality
Friction pair in the machinery of border, is usually always at the simultaneous mixed lubricating state of several lubricating status.Base bearing is different
State of wear corresponds to different oil film thicknesses, and different oil film thicknesses determines that friction different between base bearing and axle journal is strong again
Degree, different frictional strengths further mean that different mechanical energy losses, and the mechanical energy of loss is converted into the temperature that thermal energy keeps friction secondary
Degree increases；According to Seebeck thermo-electrically effect theory, all two different contact metals can constitute thermocouple --- in this way
Due to mutual contact, two electrodes of base bearing and crankshaft composition thermocouple produce thermo-electrically effect.Main bearing lubrication shape
State is related with pressure and temperature, and the present invention guarantees bearing in identical lubrication shape by control main journal bearing and oil temperature
State work monitors axis by changing bearing shell-shaft clearance control abrasion loss or carrying out bearing shell fatigue test monitoring bearing bush temperature
Abrasion loss is held, thermo-electrically signal is analyzed, the relationship of thermo-electrically signal and abrasion loss is determined, to demarcate thermo-electrically signal.
By the working mechanism of thermocouple, the reason of generating thermoelectrical potential, has temperature difference, density contrast and evolution work difference (up to tens of
Millivolt).Thomson potential is called by the potential that temperature difference generates, to homogeneous metallic conductor A of the same race, if both ends temperature is T1(work
Make end), T2(reference end), and T1> T2, then thermoelectric force EA(T1,T2) are as follows:
For the closed circuit of metallic conductor A, B composition, the algebraical sum E of thermoelectric forceAB(T1,T2) are as follows:
In above formula, K is Boltzmann constant, K=1.38 × 10-23J/K；T is kelvin degree, unit K；E is electronics
Electricity, e=1.6 × 10-19C；NA(T) when being temperature T the free electron of metal A density, NB(T) when being temperature T metal B from
By the density of electronics.
Metallic conductor A and B are contacted with each other, electron exchange also occurs between the two, reaches and is just produced in circuit after balancing
Contact potential difference.The reason of generating contact potential difference is: (1) work function of two kinds of metal electrons is different；The electricity of (2) two kinds of metals
Sub- density is different.
Temperature T1The contact potential π that tip node generatesAB(T1) are as follows:
Another contact T can similarly be obtained2The contact potential π at placeAB(T2), the algebra of a pair of of contact potential in such closed circuit
With are as follows:
In the closed circuit that metallic conductor A, B are connected into, existing contact potential, and have thermoelectric force, total thermoelectrical potential EAB
(T1,T2) be both algebraical sum, formula (1), (2) algebraic addition are had:
As can be seen from the above equation, the size of closed circuit thermoelectrical potential is not only related with metallic conductor A, B, and with temperature
Spend T1And T2Related, after thermode material determines, thermoelectrical potential size is dependent on T1And T2Size.It has been proven in practice that, thermoelectricity
The size of gesture is with temperature difference dT at approximate direct ratio, i.e. dEAB(T1,T2)=SAB(T) dT, SABIt (T) is the Thermoelectric Power of metal A, B, i.e.,
Seebeck coefficient.
Under the premise of referring to base bearing temperature rise, by extracting thermoelectricity according to setting step-size change bearing shell-axis gap
The characteristic quantity for reflecting main bearing wear in gesture measurement result achievees the purpose that pyroelectric signal is demarcated.
Beneficial effects of the present invention:
1, the present invention uses modularized design, and flexible configuration, enhancing can be realized according to marine low speed diesel engine working condition
The adaptability of device.
2, the present invention uses flexible feedback control strategy, guarantees that lifting revolving speed and adjustment load are steadily excessive, provides examination
The stable variable working condition condition of bearing is tested, pyroelectric signal dynamic calibration is realized.
3, the present invention can simulate diesel oil eccentric drive shaft (crankshaft)-body thermoelectricity under different rotating speeds by adjusting the speed of mainshaft
Gesture variation.
3, the present invention can simulate diesel oil eccentric drive shaft under different load-body thermoelectrical potential variation by adjusting hydraulic coupling.
4, the present invention can avoid prolonged abrasion by the state of wear of change axis-bearing shell space change bearing
Test, reduces runing time, improves device normalization efficiency.
5, the present invention can simulate the different lubrications of bearing by the control of test sliding bearing oil temperature and inlet pressure
State realizes heat-electric transducer calibration under Different Lubrication Conditions Used to guarantee the accuracy of thermo-electrically signal scaling result.
6, the present invention uses modular shaft-design bearing, by replacement test bearing shell and eccentric eccentric shaft, to adapt to not
With the marine low speed diesel engine of friction pair material, the versatility of device is improved.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is main bearing wear pyroelectric signal calibration map of the invention.
Wherein, 1-industrial computer, 2-programmable logic controller (PLC)s, 3-servo-drivers, 4-data collecting cards, 5-
Motor, 6-front support bearings, 7-rear support bearings, 8-experiment bearings, 9-speed probes, 10-photoelectric encoders,
11-pyroelectric sensors, 12-torque sensors, 13-watts of back temperature sensors, 14-lubricating oil temperature sensors, 15-profits
Lubricating oil pressure sensor, 16-hydraulic cylinders, 17-hydraulic oil containers, 18-hydraulic pumps, 19-grease-boxs, 20-grease pumps,
21-lubricating oil heaters, 22-eccentric shafts, 22.1-preceding coax segments, 22.2-middle part gearratio of cycloid axle formation, 22.3-rear coax segments,
23-gears, 24-boss, 25-upper charge valves, 26-lower charge valves, 27-hydrostatic sensors, 28-displacement signals sensing
Device.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Marine diesel of the invention slides base bearing pyroelectric signal caliberating device, it includes industrial computer 1, may be programmed and patrol
It collects controller 2, servo-driver 3, data collecting card 4, motor 5, front support bearing 6, rear support bearing 7, experiment bearing 8, turn
Fast sensor 9, pyroelectric sensor 11, torque sensor 12, watt back temperature sensor 13, lubricating oil temperature sensor 14, lubrication
Oil pressure force snesor 15, hydraulic cylinder 16, hydraulic oil container 17, hydraulic pump 18, grease-box 19, grease pump 20, lubricating oil heating
Device 21, hydrostatic sensor 27 and displacement signal sensor 28；
Wherein, the signal input part of the signal output end connection programmable logic controller (PLC) 2 of industrial computer 1, it is programmable to patrol
Collect the signal input part of the servo drive control signal output end connection servo-driver 3 of controller 2, the letter of servo-driver 3
The control signal input of number output end connection motor 5, the front end of the output shaft and eccentric shaft 22 of motor 5 are fixedly and coaxially connected,
The top of the piston rod of hydraulic cylinder 16 is arranged in the outer ring of experiment bearing 8, tests and is equipped with lubricating oil in the grease channel of bearing 8
Temperature sensor 14 and lubricant pressure sensor 15 test and are equipped with a watt back temperature sensor in the bearing shell detection hole of bearing 8
13, torque sensor 12 is mounted on the preceding coax segments 22.1 of eccentric shaft 22, and the preceding coax segments 22.1 of eccentric shaft 22 are assemblied in preceding branch
In the inner ring for supportting bearing 6, the middle part gearratio of cycloid axle formation 22.2 of eccentric shaft 22 is assemblied in the inner ring of experiment bearing 8, eccentric shaft 22
Coax segments 22.3 are assemblied in the inner ring of rear support bearing 7 afterwards, and the rear end of rear coax segments 22.3 is equipped with gear 23, on gear 23
It is provided with the speed probe 9 for measuring 23 revolving speed of gear, the axle center of gear 23 is fixedly connected with the input of pyroelectric sensor 11
Axis, the photoelectric encoder 10 carried inside pyroelectric sensor 11 be used to that the input shaft of pyroelectric sensor 11 detect to
To the angular signal of eccentric shaft 22；
The input terminal of the hydraulic pump 18 connects hydraulic oil container 17, and the output end of hydraulic pump 18 is connected by upper charge valve 25
16 cavity of hydraulic cylinder of upper piston area, the output end of hydraulic pump 18 also connect the hydraulic cylinder 16 of piston lower portion by lower charge valve 26
Cavity, hydraulic cylinder 16 is interior to be equipped with hydrostatic sensor 27, and experiment 8 outer ring of bearing is equipped with displacement signal sensor 28；
The input terminal of grease pump 20 connects grease-box 19, and the output end of grease pump 20 connects lubricating oil heater 21
Input terminal, the output end of lubricating oil heater 21 be respectively connected to front support bearing 6, rear support bearing 7 and test bearing 8 profit
Lubricating oil input port；
The pyroelectric signal input terminal of the signal output end connection data collecting card 4 of the pyroelectric sensor 11, photoelectric coding
The angular signal input terminal of the signal output end connection data collecting card 4 of device 10, the signal output end connection number of speed probe 9
According to the tach signal input terminal of capture card 4, the lubrication of the signal output end connection data collecting card 4 of lubricating oil temperature sensor 14
Oil temperature signal input part, the lubricating oil pressure letter of the signal output end connection data collecting card 4 of lubricant pressure sensor 15
Number input terminal, watt back temperature signal input of the signal output end connection data collecting card 4 of watt back temperature sensor 13, torque
The torque signal input terminal of the signal output end connection data collecting card 4 of sensor 12, the signal output end of hydrostatic sensor 27
The hydraulic pressure signal input terminal of data collecting card 4 is connected, the signal output end connection data collecting card 4 of displacement signal sensor 28
Displacement signal input terminal；
The control signal input of the hydraulic pump control signal output end connection hydraulic pump 18 of programmable logic controller (PLC) 2,
The control signal input of the grease pump control signal output connection grease pump 20 of programmable logic controller (PLC) 2, can compile
The control signal input of the lubricating oil temperature control signal output connection lubricating oil heater 21 of journey logic controller 2.
In above-mentioned technical proposal, the outer end face of the gear 23 is fixedly connected with boss 24, and the boss 24 is equipped with connection
Axle sleeve, coupling band and gear 23 are coaxially disposed, and the input shaft of pyroelectric sensor 11 is fixedly connected with coupling band.
In above-mentioned technical proposal, the outer ring of the front support bearing 6 and rear support bearing 7 is each attached on bracket.
In above-mentioned technical proposal, the foil gauge of the torque sensor 12 is attached to the preceding coax segments 22.1 of eccentric shaft 22.
In above-mentioned technical proposal, programmable logic controller (PLC) 2 controls signal to servo-driver 3 and drives 22 turns of eccentric shaft
It moves, the Gravity support of spring bearing 6 and rear support bearing 7 as eccentric shaft 22, in horizontal and vertical position school.When eccentric shaft 22
When rotation, the lubricating oil brought into forms oil film wedge around it, can bear sizable stress alternation, this i.e. thermoelasticity hydrodynamic
Lubricating system.Programmable logic controller (PLC) 2 controls hydraulic coupling simultaneously, and experiment bearing 8 is made to reach the actual work of diesel engine main bearing
Make loading condiction.Programmable logic controller (PLC) 2 controls lubricating oil temperature and lubricating oil pressure, makes into machine lubricating oil viscosity, temperature
Degree, lubricating status are consistent during the test.Test bearing bearing shell is generally made of wear-resisting babbit and steel back, alloy
It is separated between layer and gearratio of cycloid axle formation by lubricating oil oil film, forms liquid lubrication；Rack and test bearing bearing shell are fitted closely into
Equipotential system, connection is good and is grounded.If local failure occurs for lubricating oil film, the lubricating status between eccentric shaft 22 and bearing shell becomes
Difference generates therebetween and rubs and issue a large amount of heat, the temperature of eccentric shaft 22, lubricating oil film and bearing bush is caused to rise
It is high.The alloy-layer of bearing shell is generally made of tinbase or lead-base babbitt, and it is different to be made material from steel crankshaft, under hot conditions
Thermo-electrically idol effect can be generated.Since the activity enthusiasm of bearing shell and crankshaft metal electron is different from density, heat scrubbing contact is generated
When, activity enthusiasm and the high metal electron of density can lose the metal one of electronics to enthusiasm and a low density Fang Yidong
Side is positively charged, and the side for obtaining electronics is negatively charged, and here it is tunnel-effects.In addition, same metal is due to own temperature gradient
Difference can also generate thermoelectric force.The material of boss 24 is identical with 22 material of eccentric shaft, is drawn pyroelectric signal by boss 24,
Industrial computer 1 is sent to by data collecting card 4.
A kind of marine diesel sliding base bearing pyroelectric signal scaling method using above-mentioned caliberating device, it includes as follows
Step:
Step 1: (motor 5 is in servo-driver by the rotation of the control motor 5 of servo-driver 3 for programmable logic controller (PLC) 2
Slewing area under 3 controls is 0~3000rpm), motor 5 drives eccentric shaft 22 to rotate, at this time the middle part eccentric shaft of eccentric shaft 22
Gap between section 22.2 and experiment bearing 8 is normal clearance；
Step 2: programmable logic controller (PLC) 2 controls hydraulic pump 18 and grease pump 20 is opened, while programmable logic control
Device 2 processed controls lubricating oil heater 21 and works, at this point, grease-box 19 spring bearing 6, rear support bearing 7 and experiment axis forward
8 offer lubricating oil are held, hydraulic cylinder 16 acts, and the piston rod of hydraulic cylinder 16 is eccentric at interval of middle part of the preset time to eccentric shaft 22
Shaft part 22.2 increases specified load, the rated load until reaching eccentric shaft 22；
Step 3: the load that the piston rod of hydraulic cylinder 16 applies middle part gearratio of cycloid axle formation 22.2 reaches the specified of eccentric shaft 22
When load, experiment bearing pyroelectric signal, the photoelectric encoder 10 that data collecting card 4 acquires the output of pyroelectric sensor 11 export inclined
The experiment bearing of eccentric shaft tach signal, the output of lubricating oil temperature sensor 14 that mandrel angular signal, speed probe 9 export
Experiment bearing oil pressure signal, watt back temperature sensor that lubricating oil temperature signal, lubricant pressure sensor 15 export
Eccentric shaft torque signal, the hydrostatic sensor 27 that eccentric bearing pad back temperature signal, the torque sensor 12 of 13 outputs export export
Cylinder hydraulic signal, displacement signal sensor 28 export experiment bearing displacement signal (for laboratory axis to be calculated
The oil film thickness held), and the signal of above-mentioned acquisition is transferred to industrial computer 1；
Step 4: industrial computer 1 by eccentric shaft tach signal, experiment bearing oil temperature signal, experiment bearing oil
Pressure signal and eccentric shaft torque signal pass through programmable logic controller (PLC) 2 respectively with preset adjusting control strategy compared with
The control signal of output closed-loop makes eccentric shaft revolving speed, experiment bearing lubrication oil temperature, experiment bearing lubrication oil pressure and eccentric shaft
Torque is stablized on preset value；
Industrial computer 1 identifies each cycle initial time, eccentric shaft turns one week right by analyzing angle of eccentricity signal
A cycle is answered, experiment bearing pyroelectric signal, experiment bearing displacement signal, cylinder hydraulic signal are pressed into periodic segment, obtained
Bearing segmentation pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal are tested, it then will experiment bearing point
Section pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal do and averagely synthesize a cycle paracycle
Experiment bearing pyroelectric signal, experiment bearing displacement signal and cylinder hydraulic signal；
Industrial computer 1 utilizes eccentric shaft 22 and displacement signal sensor 28 by the experiment bearing displacement signal of a cycle
Geometrical relationship and euler algorithm the minimum oil film between the middle part gearratio of cycloid axle formation 22.2 of eccentric shaft 22 and real axis watt is calculated
Thickness, and database is written into minimum oil film thickness and the cylinder hydraulic signal of a cycle, as the auxiliary of eccentric shaft abrasion
Help monitoring parameter (, if thermoelectricity calibration result has exception (signal distortion), facilitate inspection)；Industrial computer 1 will test bearing one
The pyroelectric signal amplitude in a period draws the pole of bearing wear pyroelectric signal as angular coordinate as polar radius, angle of eccentricity
Coordinate diagram, and the maximum value of pyroelectric signal in polar diagram is extracted as pyroelectric signal characteristic；
Step 5: increasing the middle part gearratio of cycloid axle formation 22.2 and experiment bearing 8 of eccentric shaft 22 by manually adjusting step-by-step movement
Between gap (different state of wear are simulated from the gap of eccentric shaft or by long-time fatigue test mould by adjusting bearing shell
The abrasion of quasi- marine low speed diesel engine sliding base bearing), until the gap reaches the middle part gearratio of cycloid axle formation of eccentric shaft 22
Allowed maximal clearance is worked normally between 22.2 and experiment bearing 8, is then obtained often according to the method for step 3 and step 4
The corresponding pyroelectric signal characteristic in a gap, each gap is mapped with corresponding thermoelectricity characteristic value, forms calibration
Map, i.e. completion marine diesel sliding base bearing pyroelectric signal calibration.
Gap in the step 1 of above-mentioned technical proposal between the middle part gearratio of cycloid axle formation 22.2 of eccentric shaft 22 and experiment bearing 8
For 0.1mm.
In the step 2 of above-mentioned technical proposal, the piston rod of hydraulic cylinder 16 is inclined to the middle part of eccentric shaft 22 at interval of 30 minutes
Mandrel section 22.2 increases the load of 10MPa, the rated load until reaching eccentric shaft 22.
Gap in the step 5 of above-mentioned technical proposal, between the middle part gearratio of cycloid axle formation 22.2 and experiment bearing 8 of eccentric shaft 22
Increase 0.05mm every time.
In above-mentioned technical proposal, the gap reaches between the middle part gearratio of cycloid axle formation 22.2 of eccentric shaft 22 and experiment bearing 8
Working normally allowed maximal clearance is 0.5mm.
It is illustrated in figure 2 thermo-electrically signal scaling map, reacts the relationship of pyroelectric signal and abrasion loss.It is eccentric by changing
8 state of experiment bearing under different state of wear is simulated in the gap of axis 22 and bearing shell, due to state of wear difference, frictional dissipation
Also different, thermoelectric force is different, acquires pyroelectric signal, bearing bush temperature signal, minimum oil film thickness by measuring system and believes, and by
Industrial computer extracts thermoelectricity characteristic value by processing, forms thermo-electrically-abrasion loss map, achievees the purpose that demarcate pyroelectric signal.
In above-mentioned technical proposal, top dead centre signal, tach signal are obtained by photoelectric encoder 10, to differentiate period starting
Signal is divided into different cycles by point, and the data in 50 periods of Program extraction are an analysis circulation；It is protected using Hermite interpolation
It demonstrate,proves each cycle data amount and realizes that data are angularly changed always；It is averaged using the period, fairing processing rejects distortion；Using low pass filtered
Wave removes the High-frequency Interference in signal, and finally processing is 1440 × 7 arrays.The stability bandwidth of tach signal is calculated to measure dress
Set the stability of operation；Pressure signal is analyzed to calculate eccentric shaft friction power loss；Minimum oil film thickness is obtained by displacement signal；
Minimum oil film thickness determines that bearing lubrication state, temperature rise signal determine wear conditions；Pyroelectric signal samples a cycle
Heat-electric signal of sequence is as polar radius, and crank angle is as the angle left side, it can be found that in the smallest angle pole of oil film thickness
Coordinate diagram has maximum value, extracts this maximum value as heat-signal characteristics value；Reference of the temperature rise signal as bearing wear
Amount.Pyroelectric signal characteristic value, state of wear, friction power loss, eccentric shaft and bush gap, temperature rise signal, tach signal write-in pair
The tables of data answered is managed collectively test data by database, then after demarcating, and reading database data generate pyroelectric signal mark
Determine map.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of marine diesel slides base bearing pyroelectric signal caliberating device, which is characterized in that it include industrial computer (1),
Programmable logic controller (PLC) (2), servo-driver (3), data collecting card (4), motor (5), front support bearing (6), rear support
Bearing (7), experiment bearing (8), speed probe (9), pyroelectric sensor (11), torque sensor (12), watt back temperature sensing
It is device (13), lubricating oil temperature sensor (14), lubricant pressure sensor (15), hydraulic cylinder (16), hydraulic oil container (17), hydraulic
(18), grease-box (19), grease pump (20), lubricating oil heater (21), hydrostatic sensor (27) and displacement signal is pumped to pass
Sensor (28)；
Wherein, the signal input part of signal output end connection programmable logic controller (PLC) (2) of industrial computer (1), it is programmable to patrol
Collect the signal input part of servo drive control signal output end connection servo-driver (3) of controller (2), servo-driver
(3) control signal input of signal output end connection motor (5), the output shaft of motor (5) and the front end of eccentric shaft (22)
It is fixedly and coaxially connected, the outer ring setting of experiment bearing (8) tests the profit of bearing (8) at the top of the piston rod of hydraulic cylinder (16)
Lubricating oil temperature sensor (14) and lubricant pressure sensor (15), the bearing shell inspection of experiment bearing (8) are equipped in oil pathway
A watt back temperature sensor (13) is installed, torque sensor (12) is mounted on the preceding coax segments of eccentric shaft (22) on gaging hole
(22.1), the preceding coax segments (22.1) of eccentric shaft (22) are assemblied in the inner ring of front support bearing (6), the middle part of eccentric shaft (22)
Gearratio of cycloid axle formation (22.2) is assemblied in the inner ring of experiment bearing (8), and the rear coax segments (22.3) of eccentric shaft (22) are propped up after being assemblied in
In the inner ring for supportting bearing (7), the rear end of rear coax segments (22.3) is equipped with gear (23), and gear is provided on (23) for measuring
The axle center of the speed probe (9) of gear (23) revolving speed, gear (23) is fixedly connected with the input shaft of pyroelectric sensor (11), thermoelectricity
Included photoelectric encoder (10) is used to detect to the input shaft of pyroelectric sensor (11) to obtain inside sensor (11)
To the angular signal of eccentric shaft (22)；
The input terminal of the hydraulic pump (18) connects hydraulic oil container (17), and the output end of hydraulic pump (18) passes through upper charge valve (25)
Hydraulic cylinder (16) cavity of upper piston area is connected, the output end of hydraulic pump (18) also connects piston lower portion by lower charge valve (26)
Hydraulic cylinder (16) cavity, be equipped with hydrostatic sensor (27) in hydraulic cylinder (16), experiment bearing (8) is equipped with displacement signal sensing
Device (28)；
The input terminal of grease pump (20) connects grease-box (19), and the output end of grease pump (20) connects lubricating oil heater
(21) input terminal, the output end of lubricating oil heater (21) are respectively connected to front support bearing (6), rear support bearing (7) and reality
Test the lubricating oil input port of bearing (8)；
The pyroelectric signal input terminal of signal output end connection data collecting card (4) of the pyroelectric sensor (11), photoelectric coding
The angular signal input terminal of signal output end connection data collecting card (4) of device (10), the signal output end of speed probe (9)
The tach signal input terminal of data collecting card (4) is connected, the signal output end connection data of lubricating oil temperature sensor (14) are adopted
The signal output end of the lubricating oil temperature signal input part of truck (4), lubricant pressure sensor (15) connects data collecting card
(4) lubricating oil pressure signal input part, watt of signal output end connection data collecting card (4) of watt back temperature sensor (13)
Temperature signal input is carried on the back, the signal output end of torque sensor (12) connects the torque signal input terminal of data collecting card (4),
The hydraulic pressure signal input terminal of signal output end connection data collecting card (4) of hydrostatic sensor (27), displacement signal sensor
(28) the displacement signal input terminal of signal output end connection data collecting card (4)；
The control signal input of hydraulic pump control signal output end connection hydraulic pump (18) of programmable logic controller (PLC) (2),
The control signal input of grease pump control signal output connection grease pump (20) of programmable logic controller (PLC) (2).
2. marine diesel according to claim 1 slides base bearing pyroelectric signal caliberating device, it is characterised in that: described
The outer end face of gear (23) is fixedly connected with boss (24), and the boss (24) is equipped with coupling band, coupling band and gear (23)
Coaxial arrangement, the input shaft of pyroelectric sensor (11) are fixedly connected with coupling band, the lubricating oil temperature of programmable logic controller (PLC) (2)
Control signal output connects the control signal input of lubricating oil heater (21).
3. marine diesel according to claim 1 slides base bearing pyroelectric signal caliberating device, it is characterised in that: described
The outer ring of front support bearing (6) and rear support bearing (7) is each attached on bracket.
4. marine diesel according to claim 1 slides base bearing pyroelectric signal caliberating device, it is characterised in that: described
The foil gauge of torque sensor (12) is attached to the preceding coax segments (22.1) of eccentric shaft (22).
5. a kind of marine diesel using caliberating device described in claim 1 slides base bearing pyroelectric signal scaling method,
It is characterized in that, it includes the following steps:
Step 1: programmable logic controller (PLC) (2) drives eccentric by servo-driver (3) control motor (5) rotation, motor (5)
Axis (22) rotation, between the gap between the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and experiment bearing (8) is normal at this time
Gap；
Step 2: programmable logic controller (PLC) (2) controls hydraulic pump (18) and grease pump (20) is opened, while programmable logic
Controller (2) controls lubricating oil heater (21) work, at this point, grease-box (19) spring bearing (6), rear support bearing forward
(7) and experiment bearing (8) provides lubricating oil, and hydraulic cylinder (16) movement, the piston rod of hydraulic cylinder (16) is at interval of preset time pair
The middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) increases specified load, the rated load until reaching eccentric shaft (22)；
Step 3: the piston rod of hydraulic cylinder (16) reaches the volume of eccentric shaft (22) to the load that middle part gearratio of cycloid axle formation (22.2) applies
When constant load, data collecting card (4) acquires the experiment bearing pyroelectric signal of pyroelectric sensor (11) output, photoelectric encoder (10)
Angle of eccentricity signal, eccentric shaft tach signal, the lubricating oil temperature sensor (14) of speed probe (9) output of output are defeated
The experiment bearing oil pressure signal of experiment bearing oil temperature signal, lubricant pressure sensor (15) output out,
The eccentric bearing pad back temperature signal of watt back temperature sensor (13) output, torque sensor (12) output eccentric shaft torque letter
Number, hydrostatic sensor (27) output cylinder hydraulic signal, displacement signal sensor (28) output experiment bearing be displaced letter
Number, and the signal of above-mentioned acquisition is transferred to industrial computer (1)；
Step 4: industrial computer (1) by eccentric shaft tach signal, experiment bearing oil temperature signal, experiment bearing lubrication oil pressure
Force signal and eccentric shaft torque signal pass through programmable logic controller (PLC) (2) respectively with preset adjusting control strategy compared with
The control signal of output closed-loop makes eccentric shaft revolving speed, experiment bearing lubrication oil temperature, experiment bearing lubrication oil pressure and eccentric shaft
Torque is stablized on preset value；
Industrial computer (1) identifies each cycle initial time, one week correspondence of eccentric shaft turns by analyzing angle of eccentricity signal
Experiment bearing pyroelectric signal, experiment bearing displacement signal, cylinder hydraulic signal are pressed periodic segment, obtain reality by a cycle
Bearing segmentation pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal are tested, it then will experiment bearing segmentation
Pyroelectric signal, experiment bearing displacement subsection signal, cylinder hydraulic block signal do and averagely synthesize a cycle paracycle
Test bearing pyroelectric signal, experiment bearing displacement signal and cylinder hydraulic signal；
Industrial computer (1) utilizes eccentric shaft (22) and displacement signal sensor by the experiment bearing displacement signal of a cycle
(28) geometrical relationship and euler algorithm is calculated between the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and real axis watt
Minimum oil film thickness, and database is written into minimum oil film thickness and the cylinder hydraulic signal of a cycle, as eccentric shaft
The auxiliary monitoring parameter of abrasion；Industrial computer (1) will test the pyroelectric signal amplitude of bearing a cycle as polar radius, bias
Shaft angle draws the polar diagram of bearing wear pyroelectric signal as angular coordinate, and extracts pyroelectric signal in polar diagram
Maximum value is as pyroelectric signal characteristic；
Step 5: step-by-step movement increases the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and tests the gap between bearing (8), and one
Allowed until the gap reaches to work normally between the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and experiment bearing (8)
Maximal clearance, then obtain the corresponding pyroelectric signal characteristic in each gap according to step 3 and the method for step 4, will
Each gap is mapped with corresponding thermoelectricity characteristic value, forms calibration map, i.e. completion marine diesel sliding base bearing heat
Electric signal calibration.
6. marine diesel according to claim 5 slides base bearing pyroelectric signal scaling method, it is characterised in that: described
Gap in step 1 between the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and experiment bearing (8) is 0.1mm.
7. marine diesel according to claim 5 slides base bearing pyroelectric signal scaling method, it is characterised in that: described
In step 2, the piston rod of hydraulic cylinder (16) increased at interval of 30 minutes middle part gearratio of cycloid axle formation (22.2) to eccentric shaft (22)
The load of 10MPa, the rated load until reaching eccentric shaft (22).
8. marine diesel according to claim 5 slides base bearing pyroelectric signal scaling method, it is characterised in that: described
In step 5, the gap between the middle part gearratio of cycloid axle formation (22.2) and experiment bearing (8) of eccentric shaft (22) increases 0.05mm every time.
9. marine diesel according to claim 5 slides base bearing pyroelectric signal scaling method, it is characterised in that: described
Gap reaches between the maximum that normal work is allowed between the middle part gearratio of cycloid axle formation (22.2) of eccentric shaft (22) and experiment bearing (8)
Gap is 0.5mm.
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