CN110207988A - Marine engine connecting rod liner wear simulation test device and test method - Google Patents
Marine engine connecting rod liner wear simulation test device and test method Download PDFInfo
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- CN110207988A CN110207988A CN201910496136.9A CN201910496136A CN110207988A CN 110207988 A CN110207988 A CN 110207988A CN 201910496136 A CN201910496136 A CN 201910496136A CN 110207988 A CN110207988 A CN 110207988A
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- 238000004088 simulation Methods 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000035939 shock Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 238000002474 experimental method Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 6
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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Abstract
The present invention relates to a kind of marine engine connecting rod liner wear simulation test devices, including pedestal, upright guide rail, piston, driving device, connecting rod and loading device；Upright guide rail is installed on pedestal；Piston is movably installed on upright guide rail；Driving device includes motor and eccentric wheel, the rotation of motor driven eccentric wheel；Connecting rod tip is hinged by pin shaft and eccentric wheel, and wrist-pin end of connecting rod is embedded with connecting rob bushing, piston pin be plugged in connecting rob bushing it is interior and with connecting rob bushing clearance fit；Loading device includes the spring mechanism for applying the equivalent loading hydraulic cylinder of permanent load to piston and applying shock loading to piston.The present invention can the piston pin-of the bushing to different materials and different surface treatment connecting rob bushing friction is secondary carries out platform simulation test, obtain the friction and wear characteristic of different materials bushing, and simulated engine duty parameter, structural parameters, process etc. can be obtained to the influence of piston pin-connecting rob bushing friction secondary oil film thickness by the orbit of shaft center of measurement piston pin.
Description
Technical field
The present invention relates to marine engine modelling technique fields, and in particular to a kind of marine engine connecting rod bushing mill
Damage simulation test device and test method.
Background technique
Connecting rob bushing is one of critical piece of marine engine, and piston has been connect by it by piston pin with connecting rod
Come, and is used to support piston pin.It is acted in the connecting rob bushing course of work by the gas force of mechanical periodicity and inertia force, it is difficult to be formed
Enough lubricating oil films, severe working environment wear connecting rob bushing easily, oilhole are caused to block, and then cause pernicious
Accident.Therefore, the friction and wear characteristic for studying engines connecting rod bushing has great importance, and experimental rig is to carry out connecting rod
The necessary condition of bushing research.
Most experimental rigs and test method are using simple pendulum motion simulation piston pin-connecting rob bushing in the prior art
Motion state, and impulse load is only applied by hydraulic or mechanical spring, although this method is simple, with piston pin-connecting rod
The actual loading load condition of bushing differs greatly.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the deficiency of the prior art, a kind of peculiar to vessel start is provided
Machine connecting rod bushing worn simulation test device and test method, it can the bushing to different materials and different surface treatment piston
Pin-secondary progress platform simulation the test of connecting rob bushing friction, obtains the friction and wear characteristic of different materials bushing, and can pass through survey
The orbit of shaft center for measuring piston pin obtains simulated engine duty parameter, structural parameters, process etc. and serves as a contrast to piston pin-connecting rod
The influence of the secondary oil film thickness of set friction.
The present invention is technical solution used by solving technical problem set forth above are as follows:
A kind of marine engine connecting rod liner wear simulation test device, including pedestal, upright guide rail, piston, driving dress
It sets, connecting rod and loading device；The upright guide rail is fixedly mounted on the base；The piston is movably installed in upright guide rail
It can slide up and down above and along upright guide rail, piston pin is installed on piston；The driving device includes motor and eccentric wheel, motor
For driving eccentric wheel to rotate；The big end of the connecting rod is hinged by pin shaft and eccentric wheel, and the small end of connecting rod is embedded with connecting rod lining
Set, the piston pin be plugged in connecting rob bushing and with connecting rob bushing clearance fit；The loading device is installed on above piston,
Loading device includes for the equivalent loading hydraulic cylinder to piston application permanent load and for applying shock loading to piston
Spring mechanism.
In above scheme, the experimental rig further includes monitoring system, and the monitoring system includes current vortex displacement sensing
Device, K-type thermocouple temperature sensor, pressure sensor, data collecting card and operating condition machine, the eddy current displacement sensor are two
Branch is installed on wrist-pin end of connecting rod the same side and mutually direction in 90 °, for monitoring axle center rail of the piston pin relative to connecting rob bushing
Mark；The K-type thermocouple temperature sensor is installed on inside wrist-pin end of connecting rod and is in contact with bushing back, for monitoring the company
Post gasket sleeving temperature；The pressure sensor is installed between piston and equivalent loading hydraulic cylinder, is born for monitoring the piston
Load simultaneously transmits load to piston；The eddy current displacement sensor, K-type thermocouple temperature sensor, pressure sensor letter
Number output end is connect with the signal input part of data collecting card respectively, the signal output end of the data collecting card and operating condition machine
Signal input part connection.
In above scheme, the driving device further includes drive shaft, driven shaft, V-belt, driving wheel and driven wheel；It is described
One end of drive shaft is connect with the output shaft coaxial transmission of the motor, and the other end of drive shaft is connect with capstan drive；Institute
The one end and spring bearing for stating driven shaft are coupled, and the other end and eccentric wheel of driven shaft are sequentially connected；The driven wheel case
It is located in the middle part of driven shaft and is firmly connected with it；The driving wheel drives driven wheel to realize belt transmission by V-belt.
In above scheme, it is fixedly installed with bearing block on the pedestal, is set on the bearing block there are two spring bearing,
In a spring bearing be used to support the drive shaft, another spring bearing is used to support the driven shaft.
In above scheme, the monitoring system further includes photoelectric encoder, and the photoelectric encoder is installed on driven shaft one
Side, for monitoring the output speed and top dead centre；The signal output end of photoelectric encoder and the signal of data collecting card are defeated
Enter end connection.
In above scheme, the equivalence loading hydraulic cylinder is fixed relative to pedestal, and inside is equipped with stress disk and guide post,
The stress disk is fixedly connected with guide post and can move up and down in equivalent loading hydraulic cylinder, the guide post bottom surface and pressure
Force snesor is in contact；The spring mechanism is located above equivalent loading hydraulic cylinder, when high when piston is in bottom dead center position
In guide post top surface certain distance.
In above scheme, the motor is large torque decelerating motor, and the decelerating motor reduction ratio is 20:1.
In above scheme, the experimental rig further includes supplementary module, and the supplementary module includes mainshaft overdrive braking, turns round
Square transfinite braking and sensor broken string simulation.
The invention also provides the test methods of above-mentioned marine engine connecting rod liner wear simulation test device, including with
Lower step:
(1) pedestal, the upright guide rail, work of the marine engine connecting rod liner wear simulation test device are installed as required
Plug, driving device, connecting rod and loading device；
(2) in wrist-pin end of connecting rod side, mutually two eddy current displacement sensors are installed in direction in 90 °, are pacified inside wrist-pin end of connecting rod
Dress K-type thermocouple temperature sensor simultaneously guarantees that thermocouple sensor is in contact with bushing back, in equivalent loading hydraulic cylinder and work
Pressure sensor is installed between plug, photoelectric encoder is installed in driven shaft side, by the signal output end of four sensors point
It is not connect with the signal input part of data collecting card, the signal output end of the data collecting card and the signal input part of operating condition machine
Connection；
(3) start the motor, the piston is driven to pump along the upright guide rail, realize wrist-pin end of connecting rod
Oscillating traverse motion relative to piston pin；
(4) top dead centre signal and tach signal are acquired, the revolving speed of current driven shaft and the frequency of reciprocating motion of the pistons are calculated
Rate and speed, the pressure signal for acquiring pressure sensor obtain the magnitude of load when secondary piston is born, acquire two current vortex positions
The displacement signal of displacement sensor synthesizes orbit of shaft center signal；
(5) different operating condition lower pistons are simulated by the spring of the pressure coefficient of elasticity different with replacement of regulation relief valve to bear
Cylinder pressure obtained under different loads in conjunction with axle center trajectory signal, the variation tendency of piston pin orbit of shaft center；Pass through adjusting
Motor speed obtains the variation tendency of different rotating speeds lower piston pin orbit of shaft center；Piston pin is calculated according to orbit of shaft center signal
Relative to the minimum oil film thickness of connecting rob bushing, the influence of load and revolving speed to connecting rod bushing worn is obtained.
The beneficial effects of the present invention are:
1, the present invention simulates piston pin-bushing motion state using oscillating traverse motion, with marine engine piston pin-
The actual motion state consistency of connecting rob bushing, test result are relatively accurate.
2, the present invention loads the form combined with spring mechanical using hydraulic loaded, simulates diesel engine different load piston
The variation of pin-bushing operating condition, by regulation relief valve pressure, regulating piston bears the size of permanent load, different by replacement
The spring regulating piston of coefficient of elasticity absorbs impact the size of load, close in such a way that permanent load is combined with shock loading
Like the cylinder pressure that piston in simulation real machine diesel engine is born, test result is relatively accurate.
3, the present invention is driven using belt, under conditions of meeting high torque, can use the lesser driven wheel of diameter,
Obtain larger revolving speed.
4, the orbit of shaft center and liner temperature of piston pin can be monitored in real time in the present invention, convenient for analysis duty parameter to material
The affecting laws of friction and wear behavior.
5, different lagging materials can be used in the present invention and the piston pin of different surface treatment carries out platform simulation test, improve
The versatility of device.
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 the overall structure figure of marine engine connecting rod liner wear simulation test device of the present invention；
Fig. 2 is the eccentric wheel of experimental rig shown in Fig. 1 and the partial structural diagram of connecting rod.
In figure: 10, pedestal；11, upright guide rail；12, bearing block；13, spring bearing；21, motor；22, shaft coupling；23,
Drive shaft；24, driven shaft；25, V-belt；26, driving wheel；27, driven wheel；28, eccentric wheel；30, connecting rod；31, pin shaft；32,
Connecting rob bushing；40, piston；41, piston pin；51, equivalent loading hydraulic cylinder；52, stress disk；53, guide post；54, coiling machine
Structure；61, eddy current displacement sensor；62, K-type thermocouple temperature sensor；63, pressure sensor；64, photoelectric encoder；65,
Data collecting card；66, operating condition machine.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
As shown in Figs. 1-2, it is a preferred embodiment of the present invention marine engine connecting rod liner wear simulation test device,
Including pedestal 10, upright guide rail 11, piston 40, driving device, connecting rod 30, loading device and monitoring system.Upright guide rail 11 is solid
Dingan County is loaded on pedestal 10.Piston 40 is movably installed on upright guide rail 11 and can slide up and down along upright guide rail 11, piston 40
On piston pin 41 is installed.Driving device includes motor 21 and eccentric wheel 28, and motor 21 is for driving eccentric wheel 28 to rotate.Connecting rod
30 big end is hinged by pin shaft 31 and eccentric wheel 28, and the small end of connecting rod 30 is equipped with connecting rob bushing by way of interference fit
32, piston pin 41 be plugged in connecting rob bushing 32 and with 32 clearance fit of connecting rob bushing.When motor 21 drives eccentric wheel 28 to rotate
Connecting rob bushing 32 is driven to realize the oscillating traverse motion relative to piston pin 41, for simulating piston pin 41- connecting rob bushing 32
Motion state, the actual motion state consistency with marine engine piston pin 41- connecting rob bushing 32.
Loading device is installed on 40 top of piston, and loading device includes that the equivalence for applying permanent load to piston 40 adds
Carrier fluid cylinder pressure 51 and for piston 40 apply shock loading spring mechanism 54.Equivalent loading hydraulic cylinder 51 is relative to pedestal
10 is fixed, and inside is equipped with stress disk 52 and guide post 53, and stress disk 52 is fixedly connected with guide post 53 and can add in equivalence
It is moved up and down in carrier fluid cylinder pressure 51,53 bottom surface of guide post is in contact with pressure sensor 63, and piston 40 pushes away during uplink and downlink
63 uplink and downlink of dynamic pressure force snesor, be eventually exhibited as pushing stress disk 52 and guide post 53 in equivalent loading hydraulic cylinder 51 on
Lower movement, stress disk uplink and downlink squeezes in the process or pump imbibition pressure oil, controls flowing in and out for hydraulic oil by overflow valve,
Hydraulic oil is set to maintain constant pressure always, the constant pressure of the receiving of stress disk 52 top hydraulic oil is simultaneously final by this constant pressure
Pass to piston 40.The spring mechanism 54 is located at equivalent 51 top of loading hydraulic cylinder, high when piston is in bottom dead center position
In 53 top surface certain distance of guide post, when piston 40 be up to this apart from when, be in contact with spring mechanism 54, on piston 40 continues
The shock loading that spring mechanism 54 applies is born during row.
The present invention loads the form combined with spring mechanical using hydraulic loaded, simulates diesel engine different load piston pin
The operating condition of 41- connecting rob bushing 32 changes, and by regulation relief valve pressure, regulating piston bears the size of permanent load, by more
The spring regulating piston for changing different coefficient of elasticity absorbs impact the size of load, is combined by permanent load with shock loading
The cylinder pressure that piston is born in mode approximate simulation real machine diesel engine.
Monitoring system includes eddy current displacement sensor 61, K-type thermocouple temperature sensor 62, pressure sensor 63, light
Photoelectric coder 64, data collecting card 65 and operating condition machine 66.Eddy current displacement sensor 61 is two, and to be installed on 30 small end of connecting rod same
Side and mutually direction in 90 °, for monitoring orbit of shaft center of the piston pin 41 relative to connecting rob bushing 32；K-type electric thermo-couple temperature passes
Sensor 62 is installed on inside small 30 end of connecting rod and is in contact with 32 back of bushing, for monitoring 32 temperature of connecting rob bushing；Pressure passes
Sensor 63 is installed between piston 40 and equivalent loading hydraulic cylinder 51, for monitoring the receiving load of piston 40 and transmitting to piston 40
Load；Photoelectric encoder 64 is installed on 24 side of driven shaft, for monitoring 24 revolving speed of driven shaft and top dead centre；Current vortex displacement passes
Sensor 61, K-type thermocouple temperature sensor 62, pressure sensor 63, photoelectric encoder 64 signal output end respectively with data
The signal input part of capture card 65 connects, and the signal output end of data collecting card 65 is connect with the signal input part of operating condition machine 66.
It advanced optimizes, in the present embodiment, connecting rob bushing 32 is the metal component being prepared by alloy material, and existing
Marine engine in 32 material of connecting rob bushing it is identical.Piston pin 41 is metal component made of alloy steel material, and existing
41 material of marine engine piston pin it is identical.To realize the piston pin 41 using different 32 materials of bushing and different surface treatment
Platform simulation test is carried out, obtains the friction and wear characteristic of different materials bushing, 41 two sides of piston pin are using the detachable gear of installation
The mode of piece prevents its axial float in piston 40.
It advanced optimizes, in the present embodiment, driving device further includes drive shaft 23, driven shaft 24, V-belt 25, driving wheel
26 and driven wheel 27.One end of drive shaft 23 is connect with the output shaft of motor 21 by 22 coaxial transmission of shaft coupling, drive shaft 23
The other end and driving wheel 26 be sequentially connected.One end of driven shaft 24 is coupled with spring bearing, the other end of driven shaft 24
It is sequentially connected with eccentric wheel 28.The middle part that driven wheel 27 is set in driven shaft 24 is firmly connected with it.Driving wheel 26 passes through triangle
Band 25 drives driven wheel 27 to realize belt transmission.The motor 21 of inventive drive means is large torque decelerating motor 21, is slowed down
21 reduction ratio of motor is 20:1.It is driven using belt, it, can be lesser driven using diameter under conditions of meeting high torque
Wheel 27, obtains larger revolving speed.
Advanced optimize, in the present embodiment, bearing block 12 be fixedly installed on pedestal 10, set on bearing block 12 there are two branch
Bearing 13 is supportted, one of spring bearing 13 is used to support drive shaft 23, another spring bearing 13 is used to support driven shaft 24.
It advanced optimizes, in the present embodiment, experimental rig further includes supplementary module, and supplementary module includes mainshaft overdrive system
Dynamic, torque transfinites braking and sensor broken string simulation.
The present invention also proposes the test method of above-mentioned 32 Wearing Simulated Test device of marine engine connecting rod bushing, including with
Lower step:
(1) pedestal 10 of the 32 Wearing Simulated Test device of marine engine connecting rod bushing is installed as required, is led vertically
Rail 11, piston 40, driving device, connecting rod 30 and loading device；
(2) in 30 small end side of connecting rod, mutually two eddy current displacement sensors 61 are installed in direction in 90 °, in 30 small end of connecting rod
Inside installation K-type thermocouple temperature sensor 62 simultaneously guarantees that thermocouple sensor 62 is in contact with 32 back of bushing, in equivalent liquid
Pressure sensor 63 is installed between pressure load cylinder 51 and piston 40, photoelectric encoder 64 is installed in 24 side of driven shaft, by four
The signal output end of sensor is connect with the signal input part of data collecting card 65 respectively, the signal of the data collecting card 65
Output end is connect with the signal input part of operating condition machine 66；
(3) start the motor 21, the piston 40 is driven to pump along the upright guide rail 11, the company of realization
Oscillating traverse motion of 30 small end of bar relative to piston pin 41；
(4) top dead centre signal and tach signal are acquired, revolving speed and piston 40 reciprocating motion when front driven wheel 27 are calculated
Frequency and speed, acquisition pressure sensor 63 pressure signal obtain when secondary piston 40 bear magnitude of load, acquire two
The displacement signal of eddy current displacement sensor 61 synthesizes orbit of shaft center signal.
(5) cylinder pressure that different operating condition lower pistons 40 are born is simulated by replacing the spring of different coefficient of elasticity, in conjunction with
Orbit of shaft center signal, obtains under different loads, the variation tendency of 41 orbit of shaft center of piston pin；It is obtained by adjusting 21 revolving speed of motor
The variation tendency of 41 orbit of shaft center of different rotating speeds lower piston pin.Piston pin 41 is calculated relative to even according to orbit of shaft center signal
The minimum oil film thickness of bushing 32 obtains the influence that load and revolving speed wear connecting rob bushing 32.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (9)
1. a kind of marine engine connecting rod liner wear simulation test device, including pedestal, which is characterized in that further include leading vertically
Rail, piston, driving device, connecting rod and loading device；The upright guide rail is fixedly mounted on the base；The piston activity
It is installed on upright guide rail and can be slided up and down along upright guide rail, piston pin is installed on piston；The driving device includes electricity
Machine and eccentric wheel, motor is for driving eccentric wheel to rotate；The big end of the connecting rod by pin shaft and eccentric wheel it is hinged, connecting rod it is small
End is embedded with connecting rob bushing, the piston pin be plugged in connecting rob bushing and with connecting rob bushing clearance fit；The loading device
It is installed on above piston, loading device includes for the equivalent loading hydraulic cylinder to piston application permanent load and for work
Plug applies the spring mechanism of shock loading.
2. marine engine connecting rod liner wear simulation test device according to claim 1, which is characterized in that the examination
Experiment device further includes monitoring system, and the monitoring system includes eddy current displacement sensor, K-type thermocouple temperature sensor, pressure
Force snesor, data collecting card and operating condition machine, the eddy current displacement sensor are two, are installed on wrist-pin end of connecting rod the same side simultaneously
Mutual direction in 90 °, for monitoring orbit of shaft center of the piston pin relative to connecting rob bushing；The K-type electric thermo-couple temperature sensing
Device is installed on inside wrist-pin end of connecting rod and is in contact with bushing back, for monitoring the connecting rob bushing temperature；The pressure sensing
Device is installed between piston and equivalent loading hydraulic cylinder, for monitoring the piston receiving load and transmitting load to piston；Institute
State eddy current displacement sensor, K-type thermocouple temperature sensor, pressure sensor signal output end respectively with data collecting card
Signal input part connection, the signal output end of the data collecting card connect with the signal input part of operating condition machine.
3. marine engine connecting rod liner wear simulation test device according to claim 1, which is characterized in that the drive
Dynamic device further includes drive shaft, driven shaft, V-belt, driving wheel and driven wheel；One end of the drive shaft and the motor
The connection of output shaft coaxial transmission, the other end of drive shaft are connect with capstan drive；One end of the driven shaft and spring bearing
It is coupled, the other end and eccentric wheel of driven shaft are sequentially connected；The driven wheel is set in the middle part of driven shaft and is secured to
Connection；The driving wheel drives driven wheel to realize belt transmission by V-belt.
4. marine engine connecting rod liner wear simulation test device according to claim 3, which is characterized in that the base
It is fixedly installed with bearing block on seat, is set on the bearing block there are two spring bearing, one of spring bearing is used to support institute
Drive shaft is stated, another spring bearing is used to support the driven shaft.
5. marine engine connecting rod liner wear simulation test device according to claim 3, which is characterized in that it is described from
Moving axis side is equipped with photoelectric encoder, for monitoring the output speed and top dead centre；The signal of photoelectric encoder exports
End is connect with the signal input part of data collecting card.
6. marine engine connecting rod liner wear simulation test device according to claim 1, which is characterized in that described etc.
Value loading hydraulic cylinder is fixed relative to pedestal, and inside is equipped with stress disk and guide post, and the stress disk and guide post are fixed
It connects and can be moved up and down in equivalent loading hydraulic cylinder, the guide post bottom surface is in contact with pressure sensor；The spring
Mechanism is located above equivalent loading hydraulic cylinder, when piston be in bottom dead center position higher than guide post top surface certain distance.
7. marine engine connecting rod liner wear simulation test device according to claim 1, which is characterized in that the electricity
Machine is large torque decelerating motor, and the decelerating motor reduction ratio is 20:1.
8. marine engine connecting rod liner wear simulation test device according to claim 1, which is characterized in that the examination
Experiment device further includes supplementary module, the supplementary module include mainshaft overdrive braking, torque transfinite braking and sensor broken string mould
It is quasi-.
9. the test method of marine engine connecting rod liner wear simulation test device according to claim 1, feature
It is, comprising the following steps:
(1) install as required the pedestal of the marine engine connecting rod liner wear simulation test device, upright guide rail, piston,
Driving device, connecting rod and loading device；
(2) in wrist-pin end of connecting rod side, mutually two eddy current displacement sensors are installed in direction in 90 °, and K is installed inside wrist-pin end of connecting rod
Type thermocouple temperature sensor simultaneously guarantees that thermocouple sensor is in contact with bushing back, equivalent loading hydraulic cylinder and piston it
Between pressure sensor is installed, driven shaft side install photoelectric encoder, by the signal output end of four sensors respectively with
The signal input part of data collecting card connects, and the signal output end of the data collecting card and the signal input part of operating condition machine connect
It connects；
(3) start the motor, the piston is driven to pump along the upright guide rail, realize that wrist-pin end of connecting rod is opposite
In the oscillating traverse motion of piston pin；
(4) top dead centre signal and tach signal are acquired, calculate current driven shaft revolving speed and reciprocating motion of the pistons frequency with
Speed, the pressure signal for acquiring pressure sensor obtain the magnitude of load when secondary piston is born, acquire two current vortex displacements and pass
The displacement signal of sensor synthesizes orbit of shaft center signal；
(5) gas that different operating condition lower pistons are born is simulated by the spring of the pressure of regulation relief valve coefficient of elasticity different with replacement
Cylinder pressure obtains under different loads in conjunction with axle center trajectory signal, the variation tendency of piston pin orbit of shaft center；By adjusting motor
Revolving speed obtains the variation tendency of different rotating speeds lower piston pin orbit of shaft center；It is opposite that piston pin is calculated according to orbit of shaft center signal
In the minimum oil film thickness of connecting rob bushing, the influence of load and revolving speed to connecting rod bushing worn is obtained.
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| CN201910496136.9A CN110207988A (en) | 2019-06-10 | 2019-06-10 | Marine engine connecting rod liner wear simulation test device and test method |
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| CN201910496136.9A CN110207988A (en) | 2019-06-10 | 2019-06-10 | Marine engine connecting rod liner wear simulation test device and test method |
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|---|---|---|---|---|
| CN110937136A (en) * | 2019-10-25 | 2020-03-31 | 南京航空航天大学 | Aircraft landing gear buffer friction force testing device and testing method thereof |
| CN111982731A (en) * | 2020-08-26 | 2020-11-24 | 徐州徐工挖掘机械有限公司 | Bushing friction wear test device |
| CN113008533A (en) * | 2020-12-31 | 2021-06-22 | 莱茵技术（上海）有限公司 | Fatigue testing device for swing rotating shaft |
| CN113639974A (en) * | 2020-04-23 | 2021-11-12 | 徐州徐工液压件有限公司 | Test device for hydraulic cylinder bush |
| CN115824615A (en) * | 2023-02-09 | 2023-03-21 | 武汉理工大学 | Engine piston pin friction performance testing system and testing method thereof |
| CN116359058A (en) * | 2023-06-01 | 2023-06-30 | 沈阳宝隆飞机零部件有限公司 | Bushing wear detection device and method |
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