CN109357960A - The military service testing method of endurance performance and experimental rig of hydraulic reciprocating sealing element - Google Patents
The military service testing method of endurance performance and experimental rig of hydraulic reciprocating sealing element Download PDFInfo
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- CN109357960A CN109357960A CN201811300079.4A CN201811300079A CN109357960A CN 109357960 A CN109357960 A CN 109357960A CN 201811300079 A CN201811300079 A CN 201811300079A CN 109357960 A CN109357960 A CN 109357960A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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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
- G01M13/005—Sealing rings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
Abstract
The present invention is the military service testing method of endurance performance and experimental rig of a kind of hydraulic reciprocating sealing element, wherein: servo electrical machinery system provides variable load for hydraulic cylinder, hydraulic system is used for the reciprocating motion of Control experiment cylinder, temperature control system is used for the control of oil liquid temperature, realizes the simulation to hydraulic reciprocating sealing element actual condition with this；By being laid on the fiber Bragg grating strain sensor of piston guide set inside, the contact stress of hydraulic reciprocating sealing element is measured, realizes the monitoring to sealing element service state；The probability of fatigue failure that load friction subsystem is sealed by calculating hydraulic cylinder/piston, realizes the analysis and judgement to hydraulic reciprocating sealing element fatigue failure state；By testing the hydraulic reciprocating sealing element fatigue life test result under available specific service condition, the reliability design for hydraulic reciprocating sealing element provides foundation.
Description
Technical field
The present invention relates to the methods and experimental rig of a kind of hydraulic reciprocating sealing element military service fatigue property test.
Background technique
Hydraulic reciprocating sealing element is the critical elements in hydraulic cylinder, is widely used in such as aerospace, engineering machinery, vapour
In the equipment such as vehicle, petrochemical industry and metallurgy.During being actually on active service, hydraulic reciprocating sealing element therein will receive hydraulic cylinder
The collective effect for the frictional force that precompressed stress under compression, periodical alternation oil liquid pressure and reciprocatory movement generate, in complexity
Stress state, be easy to cause fatigue failure under the conditions of long-term work.Its consequence not only results in hydraulic cylinder and generates leakage, also
Potential security risk can be brought.Therefore, fatigue behaviour under hydraulic reciprocating sealing element duty status is studied, to promptly and accurately predicting
Sealing element fatigue life avoids major accident from being of great significance.But due to the motion state and structure of hydraulic reciprocating sealing
Limitation, so that the fatigue behaviour detection of hydraulic reciprocating sealing becomes a problem.
In the course of work that moves in circles of hydraulic cylinder, a pair of of gold is together constituted by the cylinder barrel and piston seal of hydraulic cylinder
Category/polymer load friction subsystem.According to the correlation theory (bibliography: L.A. Suo Siluo Paderewski of tribo_fatigue
(White Russian) writes, and high ten thousand, which shake, translates the Xuzhou tribo_fatigue [M]: publishing house of China Mining University, and 2013), failure probability is reflection
System reliability judges the actual parameter of friction subsystem fatigue performance.In this sliding friction pair system of cylinder barrel/piston seal
In system, piston seal is pre-compressed the frictional force of the effect and reciprocatory movement generation of stress, working medium pressure etc.
Comprehensive function, wherein with reciprocating motion cyclically-varying occurs for the direction of working medium pressure and frictional force, belongs to
Alternating load.Therefore, cylinder barrel/piston seal load friction subsystem fatigue failure is due to mechanical and friction reciprocation
And the complex injury gradually generated, it can be damaged by the reliability correlation theory for the subsystem that rubs to solve this kind of abrasion-fatigue
Hurt problem.
The research of sealing element fatigue behaviour is focusing more on in the research of rubber material fatigue behaviour at this stage.It utilizes
The linear progressive damage rule of Miner predicts the service life of rubber material.Duan little Cheng et al. is on fatigue tester to dumbbell
Examination column applies variable amplitude loading signal and has obtained the fatigue life of examination column, then predicts dumbbell by the linear criterion of Miner and tries column
Fatigue life, the results showed that within twice of discrete lines, bimetry and actual measurement the service life goodness of fit it is higher (bibliography: become
Rubber shock absorber fatique testing at elevated temperature and Modeling Method [D] South China Science & Engineering University under width load, 2016.).Pass through prediction
Obtained fatigue life result shows the linear criterion of Miner to accurate it can be found that there are also a certain distance it and actual life
Predicted fatigue life is insecure；Test simultaneously is to complete under the conditions of loading specific load, and the fatigue of sealing element is lost
Effect process often also suffers from the influence of the factors such as temperature and oil liquid variation, so it can not reflect that hydraulic reciprocating seals strictly according to the facts
Fatigue life of the part under actual working conditions, and unique rationally alternative plan is exactly to pass through military service-simulation fatigue examination
Testing to obtain test result, (bibliography: Abel Si Haiwei (Holland) writes, and Wu Xueren etc. translates fatigue [M] of structure and material
Beijing: aircraft industry publishing house, 2014).
Nie Songlin of Beijing University of Technology et al. is proposed and is devised a kind of method for testing fatigue and dress for hydraulic cylinder
It sets, which fixes hydraulic cylinder piston, carrys out simulated solution using the oil liquid pressure that electro-hydraulic reversing valve changes hydraulic cylinder piston two sides
Reciprocating motion of the cylinder pressure under load effect, and then the fatigue life for obtaining hydraulic cylinder, (bibliography: Nie Songlin, Liu Xiangyang were opened
Zhenhua, a kind of Beijing method for testing fatigue and device [P] for hydraulic cylinder Yin Shuai, Zhang little Jun: CN103939421A,
2014-07-23.).But the experimental rig does not account for hydraulic cylinder oil liquid temperature, reciprocating motion speed during actual motion
The influence of the conditions such as degree；Xi Weimin devises a kind of multifunction hydraulic Reciprocating Seals fatigue life test machine (bibliography: a surname
For the Zhejiang people multifunction hydraulic Reciprocating Seals fatigue life test machine [P]: CN201974340U, 2011-09-14.), it can
A variety of test ginsengs such as oil liquid pressure, the speed of service, the oil liquid temperature of disposable recording hydraulic reciprocating sealing element in the process of running
Number, provides accurate test data for sealing element experimenter.But the experimental rig cannot run hydraulic reciprocating sealing element
Fatigue failure in the process carries out Accurate Prediction, cannot obtain the fatigue life data of sealing element by test.
Summary of the invention
In view of the above-mentioned problems, the technical problems to be solved by the present invention are: providing a kind of military service of hydraulic reciprocating sealing element
Testing method of endurance performance and experimental rig measure the contact stress of hydraulic reciprocating sealing element using fiber-optic grating sensor, warp
Monitoring to hydraulic reciprocating sealing element fatigue state is realized in the processing and analysis for crossing data, and it is close by test to obtain hydraulic reciprocating
Fatigue life of the sealing under specific service condition.
The present invention solves its technical problem institute, and the following technical solution is employed:
The military service fatigue performance testing device of hydraulic reciprocating sealing element provided by the invention, including fiber grating strain sensor
Device, counter, pull pressure sensor, ball-screw, servo motor, servo-driver, data collecting card, PLC and computer,
In: counter is screwed on bracket, is attached by data line and data collecting card；The both ends of pull pressure sensor
It is connect respectively with ball-screw sliding block and piston rod；Servo motor is connect by cable with servo-driver, and servo-driver is defeated
Outlet and ball-screw are attached with bolt；The input terminal of servo-driver is connect with PLC；Data collecting card and computer are logical
Cross data line connection.
The military service fatigue performance testing device, further includes: servo electrical machinery system provides variable load for hydraulic cylinder；Two
Two logical proportional reversing valves of position and displacement sensor realize the closed-loop control of hydraulic cylinder reciprocating speed；3-position 4-way proportional reversing valve
And displacement sensor realizes the closed-loop control of hydraulic cylinder reciprocal position.
The servo electrical machinery system is used to load the loading spectrum of actual measurement, and variable load, accurate mould are provided for hydraulic cylinder
Load condition of quasi- hydraulic reciprocating sealing element during being actually on active service.
The hydraulic cylinder is double acting hydraulic cylinder, and piston rod therein is divided into two parts in left and right, piston guide set warp
It is divided into former and later two parts after crossing improvement.
The circumferential movement of servo motor is converted to sliding block and moved back and forth by the ball-screw.
The military service testing method of endurance performance of hydraulic reciprocating sealing element provided by the invention, specifically: according to the ginseng of setting
The control that moves back and forth, reciprocating speed control, position control and temperature control are counted, it is close to simulate hydraulic reciprocating by experiment parameter
The specific service condition of sealing studies its fatigue behaviour, and obtains hydraulic reciprocating sealing element in specific military service item by test
Fatigue life under part.
This method utilizes the fiber Bragg grating strain sensor for being laid on piston guide set inside, real-time monitoring piston seal bottom
Face contact stress variation, it is close to hydraulic cylinder/piston by the computer by transferring data to computer with data collecting card
The probability of fatigue failure of envelope load friction subsystem is calculated, and calculated result and the invalidation probability thresholds of setting are carried out pair
Than to differentiate to the state of hydraulic reciprocating sealing element fatigue failure；It is taken using counter records hydraulic reciprocating sealing element
Fatigue life during labour.
For this method mainly using the fiber Bragg grating strain sensor for being laid on piston guide set inside, real-time monitoring is hydraulic past
The contact stress variation of multiple sealing element；Utilize the fatigue life of counters count hydraulic reciprocating sealing element；It is sensed using pressure
Device real-time measurement load pressure；Sensing data acquisition is carried out using data collecting card；Alternation is generated using PLC control servo motor
Load, provide changing load for hydraulic cylinder, the load that simulation hydraulic cylinder is born in actual moving process；Using computer into
The record of row data and preservation, to the secondary probability of fatigue failure in reciprocatory movement of hydraulic cylinder/piston sealing load friction
It is calculated, and the state of hydraulic reciprocating sealing element fatigue failure is differentiated.
In this method, the fiber-optic grating sensor for being laid on hydraulic reciprocating sealing element bottom measures hydraulic reciprocating sealing in real time
Part contact pressure data, computer carry out processing calculating to the data collected, real-time monitoring hydraulic reciprocating sealing element it is tired
Labor situation accurately obtains the fatigue life of hydraulic reciprocating sealing element.
Military service fatigue performance testing device of the present invention, the fiber-optic grating sensor is by two fiber Bragg grating strain sensors
It is formed with a fiber grating temperature sensor, two fiber-optic grating sensors are strain type optical fiber grating sensor, their edges
Be located at preceding guide sleeve, rear guide sleeve inboard groove and be circumferentially laid with；Temperature sensor uses fiber grating temperature sensor,
It is axially disposed in guide sleeve inboard groove, drawn finally by fine inclined hole is drawn.
The present invention has major advantage below compared with prior art:
The experimental rig for designing a kind of fatigue life test, can simulate hydraulic Reciprocating Seals under different operating conditions
Service condition, by fatigue life of the experimental test hydraulic reciprocating sealing element under specific military service process condition, for hydraulic past
The Fatigue Performance Analysis and reliability design of multiple sealing element.
This experimental rig can be provided according to the loading spectrum under practical service condition by servo motor for hydraulic cylinder variable
Load, the circumferential movement of servo motor is converted to the linear motion of sliding block using ball-screw, provides stabilization for hydraulic cylinder
Reciprocating speed.The closed-loop control system formed using 2/2-way reversal valve, displacement sensor and PLC adjusts 2/2-way
The openings of sizes of proportional reversing valve, to control the reciprocating speed of hydraulic cylinder.
It writes data processor using computer test data is handled and analyzed.
According to the correlation theory in tribo_fatigue about metal/polymer load friction subsystem reliability, metalwork
Suffered cyclic strains are much smaller than the fatigue limit of metal material, and thrashing focuses primarily upon polymer.In hydraulic cylinder/reciprocal
It seals in load friction subsystem, Reciprocating Seals can be drawn during being actually on active service due to periodic tangent direction friction stress
Fatigue damage is played, the increase of its failure probability is caused.Specific calculation formula is as follows:
τw: polymer contact stress (tangential friction force)；
CS: determine mating plate shape and its coefficient in friction process with metal pieces into contact interactive mode；
Damage probability in friction is estimated；
τtf (1): single heat wave dynamic stress occurs stress in the polymer as temperature change 1K；
τd: the damage limit of polymer in frrction load；
ms: mechanical heterogeneity (defect level) parameter of polymer；
Δ T: polymer temperature variation.
The fatigue state of hydraulic reciprocating sealing element can be monitored in real time in the experimental rig proposed through the invention, more accurately
The military service fatigue life for obtaining hydraulic reciprocating sealing element.Using be laid on piston guide set inside fiber-optic grating sensor,
The contact stress signal that subject hydraulic reciprocating sealing element can be collected in real time, using data collecting card by contact stress signal
It is transmitted to computer, cylinder barrel/piston seal friction subsystem probability of fatigue failure is calculated, by failure probability to quilt
The fatigue failure state of test solution pressure Reciprocating Seals is analyzed and is judged.It is set when the probability of fatigue failure value being calculated reaches
It when fixed threshold value, is issued and is instructed by PLC, halt system operating passes through the available subject hydraulic reciprocating sealing element of counter
Fatigue life.
The fatigue state of subject hydraulic reciprocating sealing element can be monitored in real time using fiber-optic grating sensor, analysis and research are not
The fatigue behaviour of hydraulic reciprocating sealing element under same material type, different structure and different working conditions.
Test data sees appendix 1: test data explanation.
The present invention, can be according to practical military service by the military service fatigue property test device of the hydraulic reciprocating sealing element proposed
Under the conditions of loading spectrum variable load is provided for hydraulic cylinder by servo motor, by control load variation it is hydraulic to simulate
Service condition of the Reciprocating Seals under different operating conditions, by experimental test hydraulic reciprocating sealing element in specific military service process condition
Under fatigue behaviour, can be used for the Fatigue Performance Analysis and reliability design of hydraulic reciprocating sealing element, existing test can be overcome
Device and method cannot carry out the problem of Accurate Prediction and evaluation to fatigue failure of hydraulic reciprocating sealing element during military service.
Detailed description of the invention
Fig. 1 is fatigue experimental device schematic diagram.
Fig. 2 is reciprocating speed control closed loop.
Fig. 3 is reciprocal position control closed loop.
Fig. 4 is oil liquid temperature control closed loop.
Fig. 5 is piston structure schematic diagram.
In figure: 1. fuel tanks, 2. filters, 3. hydraulic pumps, 4. proportional pressure control valves, 5. check valves, 6. 2/2-way ratios are changed
To valve, 7. 3-position 4-way proportional reversing valves, 8. oil liquid pressure sensors, 9-1. fiber Bragg grating strain sensor, 9-2. optical fiber light
Grid strain transducer, 9-3. fiber grating temperature sensor, 10. hydraulic cylinders, 11. piston rods, 12. displacement sensors, 13. count
Device, 14. pull pressure sensor, 15. ball-screws, 16. servo motors, 17. servo-drivers, 18. data collecting cards,
19.PLC, 20. computers, 21. temperature sensors, 22. coolers, 23. heaters, 24. piston rings, 25,26.O type sealing element,
27.Y type sealing element, 28. guide rings, guide sleeve after 29., 30. keys, guide sleeve before 31., 32. soket head cap screws, 33. leads.
Specific embodiment
Below with reference to examples and drawings, the invention will be further described, but does not limit the present invention.
The military service testing method of endurance performance of hydraulic reciprocating sealing element provided by the invention, specifically: using being laid on work
The optical fiber grid strain transducer on the inside of guide sleeve is filled in, the variation of real-time monitoring piston seal bottom contact stress is acquired by data
Card 18 transfers data to computer 20, tired to Barrel of Hydraulic Cylinders/piston seal load friction subsystem by the computer
Labor failure probability is calculated, so that the fatigue failure state to hydraulic reciprocating sealing element differentiates；Utilize counter records
Fatigue life during the military service of hydraulic reciprocating sealing element.
The present invention simulates the Service Environment of hydraulic Reciprocating Seals by changing experiment parameter, is then ground by testing
Study carefully the fatigue behaviour of hydraulic reciprocating sealing element.It is mainly controlled by reciprocating speed control, reciprocating motion control, load in test
The Service Environment of hydraulic Reciprocating Seals is simulated with oil liquid temperature control.
1. reciprocating speed controls:
Reciprocating speed curve, cycle time and overflow valve are set in " the test parameters setting " of computer 20 first
Initial pressure value.Pass through check valve 5,2/2-way proportional reversing valve 6,3-position 4-way by PLC19, starting hydraulic pump 3, oil liquid
Reversal valve 7 realizes the reciprocating motion of piston rod 11.The displacement signal measured is transmitted to data and adopted by draw-wire displacement sensor 12
Truck 18 carries out time derivation through computer and obtains the movement velocity of piston rod 11, and computer is fast by the movement velocity and setting
Degree is compared, and deviation signal can be obtained, and is fed back signal to 2/2-way proportional reversing valve 6 by PLC, automatic adjustment is changed
Velocity magnitude is accurately controlled to valve uninterrupted.Computer, displacement sensor, proportional reversing valve constitute closed-loop control system
(Fig. 2) guarantees the constant of reciprocating speed.
2. moving back and forth control:
Setting oil liquid commutation cycle and piston displacement curve first in " the experiment parameter setting " of computer 20, pass through
The commutation of PLC19 control three position four-way directional control valve 7.The displacement signal measured is transmitted to computer 20 by displacement sensor 12, meter
The displacement signal measured is compared by calculation machine with the piston displacement value of setting, and deviation signal can be obtained, by PLC by deviation
Signal is fed back to three position four-way directional control valve 7, accurately controls the position of piston by adjusting the size of this proportional reversing valve flow.
Computer, displacement sensor, three position four-way directional control valve constitute the position that closed-loop control system guarantees piston, close loop control circuit
As shown in Figure 3.
3. load control:
It needs to control the oil liquid pressure of hydraulic cylinder to simulate the Service Environment of hydraulic Reciprocating Seals, but it is real
Directly oil liquid pressure can not be controlled during the test of border.According to hydraulic system correlation theory, hydraulic cylinder oil liquid pressure is determined
Due to external loading, it is possible to realize the variation to hydraulic cylinder oil liquid pressure by the variation of control load.
Setting load pressure amplitude and cycle time first in " the experiment parameter setting " of computer 20, by PLC19,
Servo-driver 17 controls 16 torque of servo motor.The signal measured is passed through data collecting card by pull pressure sensor 14
18 are transmitted on computer 20, pass through temporal image real-time monitoring piston rod stress.By data collecting card 18, it is laid on
Pressure signal is transmitted to computer 20 by the oil liquid pressure sensor 8 in hydraulic cylinder 10, and display hydraulic cylinder cavity interior oil is hydraulic
The variation of power in the process of running.
4. oil liquid temperature controls:
The temperature for needing that oil liquid temperature is allowed to be climbed to setting before on-test, at this time PLC19 control heater 23 into
Row work, the temperature of oil liquid in 21 real-time monitoring fuel tank of temperature sensor, and show on the computer 20, it is set when reaching
Fixed lowest temperature angle value, heater stop heating, system starts；With the reciprocating motion of hydraulic cylinder, fuel tank oil liquid temperature
Gradually rise, when reaching the maximum temperature value of setting, PLC controls cooler 22 to system radiating, until temperature drop to it is set
Fixed maximum temperature.Computer, temperature sensor, cooler, heater constitute Cryocooler Temperature Closed Loop Control System, closed-loop control
Circuit is as shown in Figure 4.
Hydraulic reciprocating sealing element military service fatigue property test device provided by the invention, structure include meter as shown in Figure 1:
Calculation machine 20 and the oil liquid pressure sensor 8 being attached thereto with data line, fiber-optic grating sensor 9, draw-wire displacement sensor 12,
Pull pressure sensor 14, data collecting card 18, oil liquid temperature sensor 21, data collecting card 18 pass collected data information
It is sent to computer 20, computer can calculate data, shows, analyzes, control.
It is additionally provided with and provides the servo electrical machinery system of variable load for hydraulic cylinder 10 comprising: the drawing on piston rod 11
Pressure sensor 14, mounted in the ball-screw 15 of 11 right end of piston rod, the servo motor 16 connecting with ball-screw 15 passes through number
The servo-driver 17 being connected respectively with servo motor 16, PLC19 according to line.Pull pressure sensor 14 is for real-time monitoring load
Stability, PLC19 control the operation of servo motor 16.
Servo electrical machinery system can load the loading spectrum of actual measurement, and variable loading spectrum is provided for system, can be hydraulic cylinder
10 provide variable load, accurately simulate load condition of hydraulic Reciprocating Seals during being actually on active service.
It is additionally provided with and provides the hydraulic system of reciprocating motion for piston, in the system, oil liquid passes through fuel tank 1, filter 2, liquid
Press pump 3,5, the two logical reversal valves 6 of overflow valve 4, check valve and three position four-way directional control valve 7 for controlling oil liquid pressure are realized to hydraulic
The control of cylinder two cavity oil hydraulic coupling variation；Mounted in the oil liquid pressure sensor 8 of hydraulic cylinder 10, it to be used for two chamber of real-time monitoring hydraulic cylinder
Oil liquid pressure, the draw-wire displacement sensor 12 that connect with 11 left end of piston rod monitors the reciprocating motion of piston.Dragline type position
The other end of displacement sensor 12 is connected with the fixation bracket being mounted on bottom plate.The fixation bracket is equipped with counter 13, for remembering
Record the reciprocal time of piston.A data line being connected with data collecting card 18 is equipped at counter 13.
The fiber Bragg grating strain sensor 9, by fiber Bragg grating strain sensor 9-1,9-2 and a temperature sensor 9-
3 compositions.Two fiber-optic grating sensors 9-1,9-2 are strain type optical fiber grating sensor, they spread along guide sleeve inner circumferential
If.Temperature sensor 9-3 uses fiber grating temperature sensor, axially disposed on the inside of the guide sleeve, finally by drawing fibre
Inclined hole is drawn.
2/2-way proportional reversing valve 6 and draw-wire displacement sensor 12 are for realizing hydraulic cylinder reciprocating speed closed loop control
System.
3-position 4-way proportional reversing valve 7 and draw-wire displacement sensor 12 are for realizing hydraulic cylinder reciprocal position closed loop control
System.
Temperature sensor 21, heater 23 and cooler 22 in fuel tank 1, for realizing oil liquid temperature control.
The hydraulic cylinder 10 is using two-way ram bar, and piston rod 11 therein is divided to for two parts in left and right, cylinder barrel use
Fastening bolt is installed on bracket.Piston guide set is divided into former and later two guide sleeves after improving, and preceding guide sleeve 31 is with after
Guide sleeve 29 is fastened together backwards to assembling by soket head cap screw 32, and synchronous with the realization of piston rod 11 by key 30
It moves back and forth.Front and back guide sleeve groove is provided with Y type sealing element 27 and guide ring 28.Fiber-optic grating sensor lead 33 passes through
The piston rod 11 of aperture is drawn, and is connect with data collecting card 18.
During realizing the closed-loop control of hydraulic cylinder reciprocating speed, the 2/2-way proportional reversing valve is used in band
The solenoid-operated proportional reversal valve of feedback is fixed by bolts on bottom plate among hydraulic pump and 3-position 4-way proportional reversing valve.Institute
The displacement sensor stated is installed on bracket using draw-wire displacement sensor with soket head cap screw 32, and drawstring and left side are living
Stopper rod connection.
In realization hydraulic cylinder toward during the closed-loop control that reset, the 3-position 4-way proportional reversing valve is used in band
The solenoid-operated proportional reversal valve of feedback is screwed on bottom plate mounted between hydraulic cylinder and 2/2-way proportional reversing valve.It is described
Displacement sensor, using draw-wire displacement sensor, sensor is screwed on bracket, drawstring and left hand piston bar
Connection.
In realization hydraulic cylinder toward during control resets, the 3-position 4-way proportional reversing valve uses the electricity of internal feedback
Magnetic proportional reversing valve is fixed on bottom plate mounted between hydraulic cylinder and 2/2-way proportional reversing valve with bolt.The displacement passes
Sensor, using draw-wire displacement sensor, sensor is screwed on bracket, and drawstring is connect with left hand piston bar.
Servo motor 16 and ball-screw 15 connect, and the circumferential movement of servo motor is made to be converted to sliding block reciprocating motion.
Fuel tank 1 is used to provide hydraulic oil for hydraulic system, is installed on rack with bolt.
Filter 2 is used for oil filtrating, guarantees oil liquid purity, mounted between fuel tank and hydraulic pump, is attached with oil pipe.
Proportional pressure control valve 4 is used for controlling and regulating system oil liquid pressure, mounted between fuel tank and hydraulic pump, fixes bottom with bolt
On plate.
Hydraulic reciprocating sealing element military service fatigue property test device provided by the invention, the clothes for hydraulic reciprocating sealing element
Use as a servant fatigue property test.
After being laid with fiber Bragg grating strain sensor 9, military service fatigue property test test is carried out.During the test, believe
Fiber grating strain signal is transmitted in computer program by number capture card 18, and computer program is converted to contacting strain signal
Friction stree signal simultaneously utilizes failure probability formula (1), calculates current failure probability P, and calculated result is reflected in computer
On screen, when computer program detects that current probability numerical value P is greater than preset failure probability value P0, determine that hydraulic reciprocating is close
Sealing fatigue failure, system are out of service.The reciprocal time that hydraulic reciprocating sealing element is recorded by counter 13, as hydraulic past
The fatigue life value of multiple sealing element.
The present invention through the foregoing embodiment, has the following characteristics that compared with prior art
1. providing a kind of military service fatigue property test device of hydraulic reciprocating sealing element, structure composition master through the invention
Include: fiber-optic grating sensor 9, counter 13, pull pressure sensor 14, ball-screw 15, servo motor 16, servo drive
Dynamic device 17, data collecting card 18, PLC19 and computer 20.Wherein, counter 13 is screwed on bracket, passes through data
Line is attached with data collecting card 18；The both ends of pull pressure sensor 14 connect with ball-screw sliding block and piston rod 11 respectively
It connects；Servo motor 16 is connect by cable with servo-driver 17, and output end is attached with ball-screw 15 with bolt；Servo
The input terminal of driver 17 is connect with PLC19；Data collecting card 18 is connected with computer 20 by data line.
2. providing a kind of military service testing method of endurance performance of hydraulic reciprocating sealing element through the invention, pass through the test side
Method can evaluate fatigue life of the hydraulic reciprocating sealing element under specific service condition.This method is according to the parameter of setting
Move back and forth control, reciprocating speed control, position control and temperature control, simulates hydraulic reciprocation sealing by experiment parameter
The specific service condition of part, studies its fatigue behaviour.This method mainly utilizes the optical fiber grid for being laid with hydraulic reciprocating sealing element bottom
Strain transducer 9, the contact stress variation of real-time monitoring hydraulic reciprocating sealing element；Hydraulic reciprocating is counted using counter 13 to seal
The fatigue life of part；Utilize 14 real-time measurement load pressure of pull pressure sensor；Sensing data is carried out using data collecting card 18
Acquisition；The load of alternation is generated using PLC19 control servo motor 16, provides changing load for hydraulic cylinder, simulation hydraulic cylinder exists
The load born in actual moving process；Record and the preservation of data are carried out using computer 20, it is close to tested hydraulic reciprocating
The probability of fatigue failure of sealing is calculated, and is differentiated to the fatigue failure state for being tested hydraulic Reciprocating Seals.
Claims (10)
1. the military service fatigue performance testing device of hydraulic reciprocating sealing element, it is characterised in that including fiber Bragg grating strain sensor,
Counter (13), pull pressure sensor (14), ball-screw (15), servo motor (16), servo-driver (17), data acquisition
Block (18), PLC (19) and computer (20), in which: counter (13) is screwed on bracket, passes through data line and data
Capture card (18) is attached；The both ends of pull pressure sensor (14) are connect with ball-screw sliding block and piston rod (11) respectively；
Servo motor (16) is connect by cable with servo-driver (17), and servo-driver (17) output end and ball-screw (15) are used
Bolt is attached；The input terminal of servo-driver 17 is connect with PLC (19)；Data collecting card (18) and computer (20) pass through
Data line connection.
2. military service fatigue performance testing device according to claim 1, characterized by comprising: servo electrical machinery system is liquid
Cylinder pressure provides variable load；2/2-way proportional reversing valve and displacement sensor realize the closed loop control of hydraulic cylinder reciprocating speed
System；3-position 4-way proportional reversing valve and displacement sensor realize the closed-loop control of hydraulic cylinder reciprocal position.
3. military service fatigue performance testing device according to claim 2, it is characterised in that servo electrical machinery system is for loading
The loading spectrum of actual measurement, variable load is provided for hydraulic cylinder, accurately simulates hydraulic Reciprocating Seals in practical work process
Load condition.
4. military service fatigue performance testing device according to claim 2, it is characterised in that hydraulic cylinder is double acting hydraulic cylinder,
Piston rod therein is divided into two parts in left and right, and piston guide set is divided into former and later two parts after improving.
5. military service fatigue performance testing device according to claim 1, it is characterised in that: ball-screw (15) is electric by servo
The circumferential movement of machine is converted to sliding block reciprocating motion.
6. the military service testing method of endurance performance of hydraulic reciprocating sealing element, it is characterised in that: carried out according to the parameter of setting reciprocal
Motion control, reciprocating speed control, position control and temperature control, simulate the specific of hydraulic Reciprocating Seals by experiment parameter
Service condition studies its fatigue behaviour, and obtains fatigue of the hydraulic reciprocating sealing element under specific service condition by test
Service life.
7. hydraulic reciprocating sealing element military service testing method of endurance performance according to claim 6, it is characterised in that: utilize paving
It is located at the fiber Bragg grating strain sensor (9) of piston guide set inside, the variation of real-time monitoring piston seal bottom surface contact stress is led to
It crosses data collecting card (18) and transfers data to computer (20), load friction is sealed to hydraulic cylinder/piston by the computer
The probability of fatigue failure of subsystem is calculated, and calculated result and the invalidation probability thresholds of setting are compared, thus right
The state of hydraulic reciprocating sealing element fatigue failure is differentiated；The tired longevity during being on active service using counter records sealing element
Life.
8. the military service testing method of endurance performance of hydraulic reciprocating sealing element according to claim 6, it is characterised in that: the party
Method mainly utilizes the fiber Bragg grating strain sensor (9) for being laid on piston guide set inside, real-time monitoring hydraulic reciprocating sealing element
Contact stress variation；Utilize the fatigue life of counter (13) statistics hydraulic reciprocating sealing element；Utilize pull pressure sensor
(14) real-time measurement load pressure；Sensing data acquisition is carried out using data collecting card (18)；Utilize PLC (19) control servo electricity
Machine (16) generates the load of alternation, provides changing load for hydraulic cylinder, simulation hydraulic cylinder is born negative in actual moving process
It carries；Record and the preservation that data are carried out using computer (20) were moving back and forth hydraulic cylinder/piston sealing load friction pair
Probability of fatigue failure in journey is calculated, and is differentiated to the state of sealing element fatigue failure.
9. the military service testing method of endurance performance of hydraulic reciprocating sealing element according to claim 7, it is characterised in that: be laid with
Fiber-optic grating sensor in hydraulic reciprocating sealing element bottom measures sealing element contact pressure data in real time, and computer (20) is to adopting
Collect obtained data and carry out processing calculating, the fatigue conditions of real-time monitoring sealing element accurately obtain the fatigue of sealing element
Service life.
10. military service fatigue performance testing device according to claim 1, it is characterised in that fiber-optic grating sensor is by two
Fiber Bragg grating strain sensor and fiber grating temperature sensor (9-3) composition, two fiber-optic grating sensors are strain
Formula fiber-optic grating sensor, they are circumferentially laid with along positioned at preceding guide sleeve (31), rear guide sleeve (29) inboard groove；Temperature
Sensor (9-3) uses fiber grating temperature sensor, axially disposed in guide sleeve inboard groove, finally by drawing fibre
Inclined hole is drawn.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031210A (en) * | 2019-04-16 | 2019-07-19 | 青岛小海智能科技有限公司 | A kind of the fatigue property test device and application method of crawler belt sealing ring |
| CN110031035A (en) * | 2019-03-25 | 2019-07-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Fibre optical sensor stretching, compression, vibration and Alternate hot and humid fatigue test device and its test method |
| CN110242637A (en) * | 2019-04-25 | 2019-09-17 | 武汉理工大学 | Servo hydraulic cylinder Reciprocating Seals wear condition monitoring device and method |
| CN111220488A (en) * | 2019-12-04 | 2020-06-02 | 中国航空综合技术研究所 | Double-loading type wear test device for reciprocating dynamic sealing of actuating cylinder |
| CN111442917A (en) * | 2020-04-16 | 2020-07-24 | 中南大学 | Shield constructs tool changing robot storage compartment gate sealing member fatigue performance testing arrangement in service |
| WO2021000465A1 (en) * | 2019-07-03 | 2021-01-07 | 清华大学 | High-pressure high-speed reciprocating seal experiment testing platform |
| US20210056246A1 (en) * | 2019-08-21 | 2021-02-25 | Northwestern Polytechnical University | Method for evaluating reliability of a sealing structure in a multi-failure mode based on an adaboost algorithm |
| JP2021055708A (en) * | 2019-09-27 | 2021-04-08 | 日立建機株式会社 | Construction machine and system for calculating cylinder component replacement time |
| CN114813076A (en) * | 2022-04-18 | 2022-07-29 | 深圳市麦沃宝科技有限公司 | Computer keyboard fatigue resistance test equipment |
| CN114923677A (en) * | 2022-06-02 | 2022-08-19 | 中南大学 | Fatigue testing device and method for sealing piece of storage cabin gate of shield tool changing robot |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212997B1 (en) * | 1999-02-01 | 2001-04-10 | Nordson Corporation | Reciprocating fluid pumps with chromium nitride coated components in contact with non-metallic packing and gasket materials for increased seal life |
| CN2893692Y (en) * | 2006-03-08 | 2007-04-25 | 新冀机械有限公司 | Reciprocating oil-seal sealing service life testing machine |
| CN201974340U (en) * | 2011-02-18 | 2011-09-14 | 浙江西普力密封科技有限公司 | Testing machine for fatigue life of multifunction hydraulic seal element |
| CN103939421A (en) * | 2014-03-10 | 2014-07-23 | 北京工业大学 | Fatigue test method and device used for hydraulic cylinder |
| CN104535243A (en) * | 2015-01-08 | 2015-04-22 | 清华大学 | Reciprocating seal experiment table for measuring friction feature of single seal ring |
| CN105673621A (en) * | 2016-03-01 | 2016-06-15 | 浙江大学 | Multi-working-condition comprehensive simulation test system for reciprocating seal of aviation actuator |
| CN106096495A (en) * | 2016-05-20 | 2016-11-09 | 武汉理工大学 | A kind of hydraulic reciprocating seals the feature extracting method of faulted condition |
| CN206847917U (en) * | 2017-04-19 | 2018-01-05 | 东莞市兴冀机械有限公司 | A kind of novel reciprocating type oil sealing sealing life test machine |
-
2018
- 2018-11-02 CN CN201811300079.4A patent/CN109357960B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212997B1 (en) * | 1999-02-01 | 2001-04-10 | Nordson Corporation | Reciprocating fluid pumps with chromium nitride coated components in contact with non-metallic packing and gasket materials for increased seal life |
| CN2893692Y (en) * | 2006-03-08 | 2007-04-25 | 新冀机械有限公司 | Reciprocating oil-seal sealing service life testing machine |
| CN201974340U (en) * | 2011-02-18 | 2011-09-14 | 浙江西普力密封科技有限公司 | Testing machine for fatigue life of multifunction hydraulic seal element |
| CN103939421A (en) * | 2014-03-10 | 2014-07-23 | 北京工业大学 | Fatigue test method and device used for hydraulic cylinder |
| CN104535243A (en) * | 2015-01-08 | 2015-04-22 | 清华大学 | Reciprocating seal experiment table for measuring friction feature of single seal ring |
| CN105673621A (en) * | 2016-03-01 | 2016-06-15 | 浙江大学 | Multi-working-condition comprehensive simulation test system for reciprocating seal of aviation actuator |
| CN106096495A (en) * | 2016-05-20 | 2016-11-09 | 武汉理工大学 | A kind of hydraulic reciprocating seals the feature extracting method of faulted condition |
| CN206847917U (en) * | 2017-04-19 | 2018-01-05 | 东莞市兴冀机械有限公司 | A kind of novel reciprocating type oil sealing sealing life test machine |
Non-Patent Citations (2)
| Title |
|---|
| XIUXU ZHAO ET. AL: "Condition monitoring of reciprocating seal based on FBG sensors", 《SMART MATERIAL STRUCTURE》 * |
| 王春山等: "《铁路货车载荷谱及其应用》", 30 April 2018 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031035A (en) * | 2019-03-25 | 2019-07-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Fibre optical sensor stretching, compression, vibration and Alternate hot and humid fatigue test device and its test method |
| CN110031035B (en) * | 2019-03-25 | 2024-01-16 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Optical fiber sensor stretching, compressing, vibrating and alternating damp-heat fatigue testing device and testing method thereof |
| CN110031210A (en) * | 2019-04-16 | 2019-07-19 | 青岛小海智能科技有限公司 | A kind of the fatigue property test device and application method of crawler belt sealing ring |
| CN110242637A (en) * | 2019-04-25 | 2019-09-17 | 武汉理工大学 | Servo hydraulic cylinder Reciprocating Seals wear condition monitoring device and method |
| WO2021000465A1 (en) * | 2019-07-03 | 2021-01-07 | 清华大学 | High-pressure high-speed reciprocating seal experiment testing platform |
| US11657335B2 (en) * | 2019-08-21 | 2023-05-23 | Northwestern Polytechnical University | Method for evaluating reliability of a sealing structure in a multi-failure mode based on an adaboost algorithm |
| US20210056246A1 (en) * | 2019-08-21 | 2021-02-25 | Northwestern Polytechnical University | Method for evaluating reliability of a sealing structure in a multi-failure mode based on an adaboost algorithm |
| JP7301702B2 (en) | 2019-09-27 | 2023-07-03 | 日立建機株式会社 | Construction Machinery and Cylinder Parts Replacement Timing Prediction System |
| JP2021055708A (en) * | 2019-09-27 | 2021-04-08 | 日立建機株式会社 | Construction machine and system for calculating cylinder component replacement time |
| CN111220488A (en) * | 2019-12-04 | 2020-06-02 | 中国航空综合技术研究所 | Double-loading type wear test device for reciprocating dynamic sealing of actuating cylinder |
| CN111220488B (en) * | 2019-12-04 | 2022-07-01 | 中国航空综合技术研究所 | Double-loading type wear test device for reciprocating dynamic sealing of actuating cylinder |
| CN111442917B (en) * | 2020-04-16 | 2021-01-05 | 中南大学 | Shield constructs tool changing robot storage compartment gate sealing member fatigue performance testing arrangement in service |
| CN111442917A (en) * | 2020-04-16 | 2020-07-24 | 中南大学 | Shield constructs tool changing robot storage compartment gate sealing member fatigue performance testing arrangement in service |
| CN114813076A (en) * | 2022-04-18 | 2022-07-29 | 深圳市麦沃宝科技有限公司 | Computer keyboard fatigue resistance test equipment |
| CN114923677A (en) * | 2022-06-02 | 2022-08-19 | 中南大学 | Fatigue testing device and method for sealing piece of storage cabin gate of shield tool changing robot |
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