CN108254174A - Sealing element degradation system and method - Google Patents
Sealing element degradation system and method Download PDFInfo
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- CN108254174A CN108254174A CN201810102730.0A CN201810102730A CN108254174A CN 108254174 A CN108254174 A CN 108254174A CN 201810102730 A CN201810102730 A CN 201810102730A CN 108254174 A CN108254174 A CN 108254174A
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- 238000007789 sealing Methods 0.000 title claims abstract description 110
- 230000015556 catabolic process Effects 0.000 title claims abstract description 36
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 10
- 230000032683 aging Effects 0.000 claims abstract description 65
- 238000004088 simulation Methods 0.000 claims abstract description 44
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000010792 warming Methods 0.000 claims description 4
- 241000009298 Trigla lyra Species 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 230000035882 stress Effects 0.000 abstract description 7
- 230000006353 environmental stress Effects 0.000 abstract description 4
- 238000010998 test method Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 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 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of sealing element degradation systems, it includes ageing environment simulation box, temperature sensor, outer barrel, sealing element tooling, pipeline, valve, pneumatic element, temperature sensor and working medium container, temperature sensor is connected with sealing element tooling, outer barrel is arranged on inside ageing environment simulation box, the upper end surface of outer barrel is provided with interface, the internal spool with cavity and deflector hole is provided in sealing element tooling, cavity can carry out pipeline connection；Pneumatic element is connected by pipeline with sealing element tooling with outer barrel respectively, and valve is both provided on above-mentioned connecting line everywhere, and working medium container is connected by pipeline with sealing element tooling and outer barrel respectively, and is provided with the component for pressure release on pipeline herein.A kind of test method for sealing element aging is additionally provided in the present invention.The ageing environment that the present invention can couple working stress and environmental stress is simulated, high degree of automation and test efficiency height.
Description
Technical field
The invention belongs to test equipment technical fields, and in particular to a kind of sealing element degradation system and method.
Background technology
Sealing element is fundamental parts extremely important and complicated in all kinds of mechanical equipments, is played in mechanical equipment dual
Buffer action：On the one hand it prevents internal work medium and lubricating fluid external environment from leaking, on the other hand prevents in external environment
Particulate matter and the harmful substances such as dust to mechanical equipment internal penetration and diffusion.The performance of sealing element is to the safety of equipment entirety
Property, working performance, reliability and Function in Environmental have very important influence, once failure, is often caused great
Safety or environmental accident.
Due to high molecular material, for example, rubber, is the most commonly used sealing material of sealing element, with height retractility,
Good elastic and wider temperature range.In actual use, sealing element not only bears the effect of working stress, simultaneously
Also subject to ambient enviroment load, for example, the effect of the environmental factors such as temperature, oxygen.Due to by working stress and environmental stress
The main reason for collective effect leads to the aging of high molecular material, becomes seal fails.Therefore degradation would generally be used
Predict the aging life-span of sealing element, and carrying out degradation then needs the actual condition of accurate simulation sealing element, it is ensured that experiment
Credible result degree is high, so as to ensure that it is safe that equipment is on active service.
In existing disclosed patent document, there is not yet the degradation applied jointly in relation to working stress and environmental stress
Scheme.
Invention content
For shortcoming in the prior art, the present invention proposes a kind of sealing element degradation system and method, energy
Enough environment being coupled to working stress and environmental stress are simulated, so as to obtain accurate aging life-span characteristic value；It can
Whether aging is occurred to sealing element by the difference variation of external and internal pressure and degree of aging judges, work need not be disassembled
Dress, the degree of automation are higher；And the parallel test of multicompartment experiment can be carried out, improves test efficiency.
Technical scheme is as follows：
A kind of sealing element degradation system, including ageing environment simulation box, temperature sensor, outer barrel, sealing element tooling,
Pipeline, switch block, Power Component and working medium container for break-make and flow control, ageing environment simulation box are set
Case lid is equipped with, for showing in ageing environment simulation box the temperature value of heat medium and for product working media in outer barrel
The temperature sensor of temperature value be connected with outer tube inner chamber, for showing the temperature of the temperature value of sealing element tooling internal cavities
Degree sensor is connected with sealing element tooling internal cavities, and outer barrel is arranged on inside ageing environment simulation box, the upper surface of outer barrel
It is arranged on the case lid of ageing environment simulation box, the outer barrel upper end surface is provided with the interface for being configured to pipeline connection, close
The internal spool with cavity and deflector hole is provided in sealing tooling, the cavity can be attached with pipeline；It is described dynamic
Power component is connected by pipeline with being connected to the pipeline of the interface respectively, and the working medium container is distinguished by pipeline
It is connected with testpieces tooling and outer barrel.
Preferably, the interface of the upper surface setting of the outer barrel includes first interface and second interface, and the pipeline includes
First pipeline, the second pipeline, third pipeline, the 4th pipeline and the 5th pipeline；The first interface by first pipeline with
Third pipeline and the 4th pipeline are connected；The mounting seat of sealing element tooling is set at the second interface, for will be described close
Sealing tooling is fixed with the outer barrel to be coupled；One end of second pipeline is connected with the cavity, second pipeline
The other end be connected with third pipeline and the 4th pipeline.
Preferably, it is valve for carrying out break-make and controlling the switch block of flow, the valve includes the first valve, second
Valve, third valve, the 4th valve and the 5th valve set the first valve on first pipeline, the second valve are set on second pipeline；
First pressure gauge is set on pipeline between first valve and first interface, the pipe between second valve and second interface
Road setting second pressure gauge, the first pressure gauge are configured to the internal pressure of display outer barrel, and the second pressure gauge is matched
The chamber pressure for showing sealing element tooling is put, each valve is used for the break-make of control piper and carries out flow control,
According to first pressure gauge and the difference of the registration of second pressure gauge, it is sealed part failure and judges.
Preferably, the valve is shut-off valve.
Preferably, the sealing element tooling is at least with the internal spool with cavity and deflector hole, valve core housing and fixation
Pedestal is provided at least a pair of of groove on spool outer wall, valve core housing is sleeved on spool, is carried out valve core housing by firm banking
It is fixed.
Preferably, the Power Component includes pneumatic element and dynamical element, being configured to vacuumize and to gas work
Coupled respectively with the first pipeline and the second pipeline by third pipeline as the pneumatic element that medium is pressurized, mounted on
Third valve on three pipelines is controlling the break-make of third pipeline and carry out flow control；It is configured to liquid-working-medium
The dynamical element being pressurized is coupled by the 4th pipeline with the first pipeline and the second pipeline respectively, mounted on the 4th pipeline
On the 4th valve to control the break-make of the 4th pipeline and carry out flow control.
Further, described 5th pipeline one end couples respectively with the first pipeline and the second pipeline, the 5th pipeline
The other end is connected with the working medium container, and the 5th valve is mounted on the 5th pipeline, by being configured to pressure release
Pressure medium in the first pipeline of the 5th valve regulation and the second pipeline of operation, according to different dynamic source situation, correspondingly
Complete the pressure discharge operations of gas working dielectric and liquid-working-medium.
Side by side, the Power Component be the first pneumatic element and the second pneumatic element, each pneumatic element for pair
Working media is pressurized, and each pneumatic element connects the corresponding working medium container for being used as accumulator respectively, so as to anti-
Only pipeline inner pressure fluctuates；Described 5th pipeline one end couples respectively with the first pipeline and the second pipeline, the 5th pipeline
The other end is connected with the working medium container, and the 5th valve is mounted on the 5th pipeline, passes through the 5th valve tune
Save the pressure medium in the first pipeline and the second pipeline.
A kind of sealing element aging testing method, specific steps include：
Step 1: at least a pair of seal members tested is mounted at least a pair of of groove of spool outer wall；
Preset initial pressure value, operating temperature value and working pressure；The initial pressure value is less than working pressure；
Step 2: if working media is liquid, the 4th valve and the 5th valve are closed, opens the first valve, the second valve and third valve,
Open pneumatic element, vacuumize process carried out to outer barrel and sealing element tooling valve core cavity, close after the completion third valve and
Close pneumatic element；
Step 3: the initial pressure value before not heated under pre-setting the room temperature of working media；The 4th valve is opened,
After starting dynamical element to outer barrel and sealing element tooling valve core cavity injection working media, the 4th valve is closed, is simultaneously closed off
Dynamical element；
Step 4: carrying out warming temperature by aging temperature simulation box, start ageing environment simulation box, outer barrel passes through heat conduction
Type stainless steel is contacted with ageing environment simulation box, and outer barrel temperature is identical with the temperature inside the box, by adjusting in aging temperature simulation box
Temperature keeps warming operation until the temperature value of sealing element tooling inner cavity reaches the operating temperature value of setting；
Step 5: judged by first pressure gauge and second pressure gauge the working media of sealing element tooling inner cavity pressure and
Whether the pressure of the working media in outer barrel and outside sealing element tooling is more than preset working pressure；
Step 6: when pressure medium is more than the working pressure of setting, opens the 5th valve and carry out pressure regulation until work is situated between
Matter pressure recovery closes the first valve and the second valve and the 5th valve to the working pressure set；
Step 7: when pressure medium is less than the working pressure of setting, start dynamical element, open the first valve, second
Valve and the 4th valve are filled with working media until pressure reaches the working pressure of setting, be then shut off dynamical element, the first valve,
Second valve and the 4th valve；
Step 8: the start recording degradation time, when test period reaches preset duration or sealing element tooling inner cavity
Pressure is less than the working pressure of setting, judgement at least a pair of seal members generation ageing failure.
Preferably, the initial pressure value is the 10%-20% of working pressure.
Beneficial effects of the present invention are as follows：
Sealing element degradation system and method provided by the present invention, compares existing technology, has the following technology excellent
Gesture：
(1) the sealing element degradation system in the present invention realizes working stress and temperature stress double factorial experiment condition
Collaboration apply, and the pressure time-varying state caused by sealing element aging can be reproduced, so as to fulfill to being sealed in actual condition
The service load that part is born, for example, the working condition that pressure and temperature load intercouples is simulated.
(2) the sealing element degradation system in the present invention and test method can pass through the variation pair of the difference of external and internal pressure
Whether sealing element occurs aging and degree of aging is judged, need not disassemble tooling, and the degree of automation is higher.
(3) the group number of the invention by increasing or decreasing spool outer wall trench realizes the parallel test of multicompartment experiment,
Improve test efficiency.
Description of the drawings
Fig. 1 is the structure diagram of sealing element degradation system according to the present invention.
Fig. 2 is the structure diagram of sealing element tooling in sealing element degradation system according to the present invention.
Fig. 3 is the flow chart of sealing element aging testing method according to the present invention.
Fig. 4 is that various operating condition lower pipeline break-makes are patrolled in sealing element degradation system and method according to the present invention
Collect figure.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be described in detail.
Sealing element degradation system according to the present invention, including ageing environment simulation box, temperature sensor, outer barrel,
Sealing element tooling, shut-off valve, Power Component and working medium container.
Ageing environment simulation box is internally provided with heat medium.
Preferably, ageing environment simulation box is oil bath heating case, i.e., heat medium is heating oil, and ageing environment simulation box is set
Case lid is equipped with, case lid configuration is initially used for fixed outer cylinder, leads to people secondly for the heat medium splashing in heating process is prevented
Member's scald.
Temperature sensor includes the first temperature sensor and second temperature sensor, and the first temperature sensor is old for showing
Change the temperature value of heat medium in environmental chamber, second temperature sensor is used to show product working media in outer barrel, example
Such as, the temperature value of hydraulic oil.
Outer barrel is made of the good stainless steel of thermal conductivity, and outer barrel temperature is non-adjustable, is substantially simulated with aging temperature
The temperature of heat medium is identical in case, therefore the registration of the first temperature sensor and second temperature sensor is essentially identical.
Third temperature sensor is connected with the inner cavity of sealing element tooling, and the registration of third temperature sensor is sealing element tooling
Interior temperature value.
First temperature sensor is connected with Aging simulation case, and second temperature sensor is connected with outer barrel.
Preferably, each temperature sensor is separately positioned on outside ageing environment simulation box, for example, being arranged on ageing environment mould
Intend the side-walls on the case lid of case or outside the babinet of ageing environment simulation box.
Outer barrel is arranged on inside ageing environment simulation box and is immersed in heat medium, and outer barrel 3 is sealed, and prevents from adding
Working media enters outer barrel in thermal process.
Preferably, the upper surface of outer barrel is arranged on the case lid of ageing environment simulation box, and outer barrel upper end surface, which is provided with, matches
The interface connected for pipeline is put, is provided with the internal spool with cavity and deflector hole in sealing element tooling, cavity can be with
Pipeline is attached；Power Component is connected by pipeline with being connected to the pipeline of interface respectively, and working medium container passes through
Pipeline is connected respectively with sealing element tooling and outer barrel.
Preferably, outer barrel upper surface setting interface include first interface and second interface, pipeline include the first pipeline,
Second pipeline, third pipeline, the 4th pipeline and the 5th pipeline；First interface passes through the first pipeline and third pipeline and the 4th pipeline
It is connected；The mounting seat of sealing element tooling at second interface is set, is coupled for sealing element tooling to be fixed with outer barrel；
One end of second pipeline is connected with cavity, and the other end of the second pipeline is connected with third pipeline and the 4th pipeline.
Preferably, shut-off valve includes the first shut-off valve, the second shut-off valve, third shut-off valve, the 4th shut-off valve and the 5th section
Only valve sets the first shut-off valve on the first pipeline, the second shut-off valve is set on the second pipeline；In the first shut-off valve and first interface
Between pipeline on first pressure gauge is set, second pressure gauge is set on the pipeline between the second shut-off valve and second interface,
First pressure gauge is configured to the internal pressure of display outer barrel, and second pressure gauge is configured to the inner cavity pressure of display sealing element tooling
Power, each shut-off valve are used for the break-make of control piper.
5th shut-off valve is located on the 5th pipeline, is configured to when working pressure is more than setting value, pipeline carries out
Pressure discharge operations.
Preferably, the 5th shut-off valve is relief valve or relief valve.
Preferably, sealing element tooling is at least with the internal spool with cavity and deflector hole, valve core housing and firm banking.
Preferably, pneumatic element includes pneumatic element and dynamical element, and pneumatic element is by third pipeline respectively with first
Pipeline and the connection of the second pipeline, third shut-off valve on third pipeline is controlling the break-make of third pipeline and corresponding
Flow control in pipeline；Dynamical element is coupled by the 4th pipeline with the first pipeline and the second pipeline respectively, mounted on the 4th
The 4th shut-off valve on pipeline is controlling the flow control in the break-make and respective line of the 4th pipeline.
Preferably, the 5th pipeline one end couples respectively with the first pipeline and the second pipeline, the other end and work of the 5th pipeline
It is connected as media Containers, the 5th shut-off valve is mounted on the 5th pipeline, by cut-off the first pipeline of valve regulation for being used for pressure release
With the pressure medium in the second pipeline.
Sealing element degradation system as shown in Figures 1 to 4, including ageing environment simulation box 1, temperature sensor 2,
Outer barrel 3, sealing element tooling 4, the first pipeline 5, the second pipeline 6, the first shut-off valve 7, the second shut-off valve 8, first pressure gauge 9,
Two pressure gauges 10, third pipeline 11, the 4th pipeline 12, third shut-off valve 13, the 4th shut-off valve 14, pneumatic element 15, power member
Part 16, the 5th pipeline 17, relief valve 18 and working medium container 19.
Temperature sensor 2 is mounted on ageing environment simulation box 1, and temperature sensor is connect with sealing element tooling inner cavity, is used
The temperature value of intracavitary in sealing element tooling is shown in feedback.
Outer barrel 3 be mounted in ageing environment simulation box 1 and in the heat medium that is immersed in ageing environment simulation box so as to
Heating is carried out to it by heat medium so as to analog temperature load, the end face of outer barrel 3 is provided with two group interfaces, and first interface leads to
The first pipeline 5 is crossed to be connected with 11 and the 4th pipeline 12 of third pipeline；Mounting seat of the second interface for sealing element tooling 4, energy
It is enough that sealing element tooling 4 and outer barrel 3 are connected and fixed.
Preferably, sealing element tooling 4 at least with inside with the cavity and spool of deflector hole 200, valve core housing and fixation
Pedestal 300, is provided on spool outer wall at least one for accommodating 100 groove of sealing element, and valve core housing 400 is sleeved on spool,
Valve core housing is fixed by firm banking, as shown in Figure 2.
Second pipeline, 6 one end and the cavity of sealing element tooling 4 are connected, the other end respectively with 11 and the 4th pipeline of third pipeline
12 are connected.
First shut-off valve 7 is mounted on the first pipeline 5, and the second shut-off valve 8 is mounted on the second pipeline 6, the first shut-off valve 7
It is used to control the break-make of each pipeline with the second shut-off valve 8.
Be provided with first pressure gauge 9 on first pipeline 5, first pressure gauge 9 be located at first interface and the first shut-off valve 7 it
Between, it is used to show the internal pressure of outer barrel 3；It is located at second equipped with second pressure gauge 10, second pressure gauge 10 on second pipeline 6
Between interface and the second shut-off valve 8, it is used to show the chamber pressure of sealing element tooling 4.When the first shut-off valve 7 and the second cut-off
After valve 8 is closed, first pressure gauge and second pressure gauge show the operating pressure inside and outside sealing element tooling.
Preferably, Power Component includes pneumatic element 15 and dynamical element 16, and pneumatic element 15 is divided by third pipeline 11
Do not couple with the first pipeline 5 and the second pipeline 6, the third shut-off valve 13 on third pipeline 11 is controlling third pipeline
The flow control of 11 break-make and respective line；Dynamical element 16 by the 4th pipeline 12 respectively with the first pipeline 5 and second
Pipeline 6 couples, and the 4th shut-off valve 14 on the 4th pipeline 12 is controlling the break-make and respective tube of the 4th pipeline 12
The flow control on road.5th pipeline, 17 one end couples respectively with the first pipeline 5 and the second pipeline 6, the other end of the 5th pipeline 17
It is connected with working medium container 19, relief valve 18 is mounted on the 5th pipeline 17, and the first pipeline 5 and the are adjusted by relief valve 18
Pressure medium in two pipelines 6.Further, pneumatic element 15 is vacuum pump, and dynamical element 16 is oil pump.First in outer barrel
It is filled with before hydraulic oil, the air in outer barrel is extracted out using vacuum pump, hydraulic oil is added in into outer barrel later, leads to
It crosses ageing environment simulation box to heat outer barrel 3, during to avoid directly heating the hydraulic oil in outer barrel, remain in outer
Air heats expansion in cylinder, operating pressure is unstable when causing to test, and specific works logic chart is shown in Fig. 4.
Side by side, Power Component is the first pneumatic element and the second pneumatic element, it is preferable that the first pneumatic element and second
Pneumatic element is air pump.
Further, when providing gas working dielectric using the first pneumatic element and the second pneumatic element, it is contemplated that air pressure
It is smaller, directly can extract gas from natural environment with each pneumatic element and pressurize, therefore, using the first pneumatic element and
During the second pneumatic element, it is not necessary to increase the pressure vessel of storage gas medium.
The specific steps of sealing element aging testing method in being implemented according to the present invention are as shown in Figure 3, it would be desirable to be tried
The sealing element tested is mounted in the groove of spool outer wall, and valve core housing is sleeved on spool, is carried out valve core housing by firm banking
It is fixed；Sealing element tooling 4 after assembling is connected and fixed with outer barrel 3；Outer barrel 3 is mounted in ageing environment simulation box 1；
By the first pipeline 5, the second pipeline 6, the first shut-off valve 7, the second shut-off valve 8, first pressure gauge 9, second pressure gauge 10, third pipe
Road 11, third shut-off valve 13, the 4th shut-off valve 14, pneumatic element 15, dynamical element 16, the 5th pipeline 17, is let out the 4th pipeline 12
Pressure valve 18 is coupled according to the structure shown in Fig. 1；First pipeline 5 is coupled with the first interface of outer barrel 3；By the second pipeline
6 couple with the valve core cavity of sealing element tooling 4；Pre-set the initial pressure value of working media；
The 4th shut-off valve 14 and relief valve 18 are closed, opens the first shut-off valve 7, the second shut-off valve 8 and third shut-off valve 13,
It opens pneumatic element 15 and pressure adjusting is carried out to 3 inside of outer barrel and 4 valve core cavity of sealing element tooling, for example, vacuumize process, so
Third shut-off valve 13 is closed afterwards and closes pneumatic element 15；Judge whether to reach by first pressure gauge 9 and second pressure gauge 10
To the initial pressure value of setting.
The 4th shut-off valve 14 is opened, starts dynamical element 16 and work is injected to 3 inside of outer barrel and 4 valve core cavity of sealing element tooling
Make medium, close the 4th shut-off valve, and close dynamical element, start ageing environment simulation box 1 later, adjust the temperature inside the box and outer
Temperature in cylinder, until the indicating value of temperature sensor being connected with sealing element tooling inner cavity reaches set temperature value；
The corresponding pressure value of sealing element tooling is shown by first pressure gauge 9 and second pressure gauge 10.When pressure medium surpasses
When crossing setting working pressure, open relief valve 18 and carry out pressure regulation until working medium pressure restores to setting value, close the
Two shut-off valves 7 and the second shut-off valve 8, and close dynamical element 16；
Preferably, by each element manipulation logic chart in Fig. 4 it is found that opening 18 pressure release of relief valve to working medium container 19
When, relative pipeline is opened, remaining element is turned off.Judge whether pressure release to setting according to the pressure gauge of respective tube road
Working pressure after, then turn off relief valve 18.
The start recording degradation time, when test period reaches setting duration or valve core housing chamber pressure less than setting threshold
Value, judges sealing element ageing failure；Preferably, when valve core housing chamber pressure is less than given threshold, show an at least component
Ageing failure occurs.
Preferably, initial pressure value is the 10%-20% of set working pressure.
Preferably, working pressure be an interval value, the working pressure being included under various operating modes, including
The upper limit threshold of working pressure.
A kind of sealing element degradation system, including ageing environment simulation box 1 and on ageing environment simulation box 1
Temperature sensor 2, the outer barrel 3 being placed in ageing environment simulation box 1, the sealing element tooling 4 in outer barrel 3, the first pipeline 5
And the first shut-off valve 7 mounted thereto and first pressure gauge 9, the second pipeline 6 and the second shut-off valve 8 mounted thereto and
Two pressure gauges 10, vacuum pump 15 and associated third pipeline 11, the third shut-off valve 13 on third pipeline 11,
Hand increasing pressure pump 16 and the 4th associated pipeline 12, the 4th shut-off valve 14 on the 4th pipeline 12 and first
The 5th pipeline 17, the relief valve 18 mounted on the 5th pipeline 17, the working medium container that 5 and second pipeline 6 of pipeline is connected
19, such as operating oil tank.
For the degradation of selected O-shaped rubber seal, sealing element degradation system is described in detail
System and test method.
Test specimen is selected O-shaped rubber seal, and test specimen quantity is 2 groups, and working media is test specimen information and experiment letter
Breath, it is specific as shown in table 1.
Table 1O type rubber seal test specimens and Test Information
Degradation terminates criterion：It tests duration 150h or internal pressure is less than 16MPa.
Prepare before degradation：
Two groups of O-shaped rubber seal are mounted in the groove of spool outer wall, valve core housing is sleeved on spool, passes through fixation
Valve core housing is fixed pedestal, as shown in Figure 2.
Sealing element tooling 4 after assembling is connected and fixed with outer barrel 3.
Outer barrel 3 is mounted in ageing environment simulation box 1.
By the first pipeline 5, the second pipeline 6, the first shut-off valve 7, the second shut-off valve 8, first pressure gauge 9, second pressure gauge
10th, third pipeline 11, the 4th pipeline 12, third shut-off valve 13, the 4th shut-off valve 14, vacuum pump 15, dynamical element the 16, the 5th are managed
Road 17, relief valve 18 are coupled according to shown in Fig. 1.Preferably, dynamical element is hand increasing pressure pump.
First pipeline 5 is coupled with the interface of outer barrel 3；Second pipeline 6 is coupled with the valve core cavity of sealing element tooling 4.
Degradation is implemented：
The 4th shut-off valve 14 and relief valve 18 are closed, opens the first shut-off valve 7, the second shut-off valve 8 and third shut-off valve 13.
It opens vacuum pump 15 to vacuumize 3 inside of outer barrel and 4 valve core cavity of sealing element tooling, when first pressure gauge 9
Indicating value with second pressure gauge 10, for example, during 1kPa, closes third shut-off valve 13, and close vacuum pump less than the first preset value
15。
The 4th shut-off valve 14 is opened, starts dynamical element 16 and work is filled to 3 inside of outer barrel and 4 valve core cavity of sealing element tooling
Make medium, for example, hydraulic oil, when the indicating value of first pressure gauge 9 and second pressure gauge 10 reaches the second preset value, for example,
During 0.1MPa, shut-off valve 5 is closed.
Valve core cavity is continued to be pressurized using dynamical element 16.In view of hydraulic oil, pressure increases at high temperature, under room temperature
Chamber pressure is added into third preset value, for example, during 4MPa, and pass through second pressure gauge 10 and carry out indicating value, close the second cut-off
Valve 8 closes the 4th shut-off valve 14, closes hand increasing pressure pump 16.
Preferably, each valve being connected with sealing element tooling should all be first closed after the completion of pressurization, then is closed and dynamical element phase
Each valve of connection.
Start ageing environment simulation box 1, the temperature of heat medium in regulating box, until the indicating value of temperature sensor 2 reaches
4th preset value, for example, 140 DEG C.
In 1 temperature-rise period of ageing environment simulation box, the indicating value of second pressure gauge 10 is observed.Valve core cavity pressure is higher than the 5th
Preset value for example, during 21MPa, should open the second shut-off valve 8, and open relief valve 18 by redundant work medium, such as the sub- oil of liquid
Working medium container 19 is released back into, until chamber pressure is stablized at 140 DEG C in 21MPa, closes the second shut-off valve 8, closing is let out
Pressure valve 18；Valve core cavity pressure, the i.e. indicating value of second pressure gauge 10 are less than the 5th preset value at 140 DEG C, for example, 21MPa, is opened
It opens the second shut-off valve 8, opens the 4th shut-off valve 14, chamber pressure is pressurized to by 21MPa using dynamical element 16, be then shut off the
Two shut-off valves 8 close the 4th shut-off valve 14.
In 1 temperature-rise period of ageing environment simulation box, the indicating value of first pressure gauge 9 is observed, 3 chamber pressure of outer barrel is higher than
During 0.1MPa, the first shut-off valve 7 is opened, relief valve 18 is opened and extra hydraulic oil is released back into working medium container 19, until outer
3 chamber pressures of cylinder are stablized at 140 DEG C in 0.1MPa, close the first shut-off valve 7, close relief valve 18；Valve core cavity pressure exists
Less than 0.1MPa at 140 DEG C, the first shut-off valve 7 is opened, the 4th shut-off valve 14 is opened, is increased chamber pressure using dynamical element 16
0.1MPa is depressed into, closes the first shut-off valve 7, closes the 4th shut-off valve 14.
When experimental condition meets shown in table 1, determine that the first shut-off valve 7 and the second shut-off valve 8 are closed.From this
Record experiment duration is carved.
Degradation terminates：
When meeting following two groups of conditions, degradation terminates：
150h is up to during experiment；
The indicating value of valve core cavity pressure, i.e. second pressure gauge 10, less than 16MPa.
The heating switch of ageing environment simulation box 1 is closed, until the temperature inside the box is cooled to room temperature.
The first shut-off valve 7, the second shut-off valve 8 and relief valve 18 are opened, until inside and outside cavity pressure reaches normal pressure.
Coupling for the second pipeline 6 and valve core cavity is disconnected, takes out sealing element tooling 4.
Sealing part works mounting seat 4 is removed, unloads valve core housing, dismantles spool, takes out sealing element.
Sealing element is placed in snellen test and is preserved.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.It will be understood by those of ordinary skill in the art that：It still can be to aforementioned implementation
Technical solution recorded in example modifies or carries out equivalent replacement to which part or all technical features；And these are repaiied
Change or replace, the range for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of sealing element degradation system, it is characterised in that：Including ageing environment simulation box, temperature sensor, outer barrel, close
Sealing tooling, pipeline, switch block, Power Component and working medium container for break-make and flow control, aging ring
Border simulation box is provided with case lid, for showing in ageing environment simulation box the temperature value of heat medium and for being produced in outer barrel
The temperature sensor of the temperature value of product working media is connected with outer tube inner chamber, for showing the temperature of sealing element tooling internal cavities
The temperature sensor of number of degrees value is connected with sealing element tooling internal cavities, and outer barrel is arranged on inside ageing environment simulation box, outside
The upper surface of cylinder is arranged on the case lid of ageing environment simulation box, and the outer barrel upper end surface, which is provided with, is configured to pipeline connection
Interface, the internal spool with cavity and deflector hole is provided in sealing element tooling, the cavity can be connected with pipeline
It connects；The Power Component is connected by pipeline with being connected to the pipeline of the interface respectively, and the working medium container leads to
Pipeline is crossed to be connected with testpieces tooling and outer barrel respectively.
2. sealing element degradation system as described in claim 1, it is characterised in that：The upper surface setting of the outer barrel connects
Mouthful include first interface and second interface, the pipeline includes the first pipeline, the second pipeline, third pipeline, the 4th pipeline and the
Five pipelines；The first interface is connected by first pipeline with third pipeline and the 4th pipeline；At the second interface
The mounting seat of sealing element tooling is set, is coupled for the sealing element tooling to be fixed with the outer barrel；Described second
One end of pipeline is connected with the cavity, and the other end of second pipeline is connected with third pipeline and the 4th pipeline.
3. sealing element degradation system as claimed in claim 2, it is characterised in that：For carrying out break-make and control flow
Switch block for valve, the valve includes the first valve, the second valve, third valve, the 4th valve and the 5th valve, is set on first pipeline
The first valve is put, the second valve is set on second pipeline；First is set on pipeline between first valve and first interface
Pressure gauge, second pressure gauge is set on the pipeline between second valve and second interface, and the first pressure gauge configuration is used
In the internal pressure of display outer barrel, the second pressure gauge is configured to the chamber pressure of display sealing element tooling, described each
Valve for control piper break-make and carry out flow control, according to first pressure gauge and the difference of the registration of second pressure gauge,
Part failure is sealed to judge.
4. sealing element degradation system as claimed in claim 3, it is characterised in that：The valve is shut-off valve.
5. sealing element degradation system as described in claim 1, it is characterised in that：The sealing element tooling at least has interior
Portion has cavity and spool, valve core housing and the firm banking of deflector hole, at least a pair of of groove is provided on spool outer wall, by spool
It is sleeved on spool, valve core housing is fixed by firm banking.
6. sealing element degradation system as claimed in claim 3, it is characterised in that：The Power Component includes pneumatic element
And dynamical element, it is configured to the pneumatic element vacuumizing and being pressurized to gas working dielectric and passes through third pipeline
Couple respectively with the first pipeline and the second pipeline, the third valve on third pipeline to control the break-make of third pipeline with
And carry out flow control；Be configured to the dynamical element that liquid-working-medium is pressurized by the 4th pipeline respectively with
First pipeline and the connection of the second pipeline, the 4th valve on the 4th pipeline is controlling the break-make of the 4th pipeline and progress
Flow control.
7. sealing element degradation system as claimed in claim 6, it is characterised in that：Described 5th pipeline one end is respectively with
One pipeline and the connection of the second pipeline, the other end of the 5th pipeline are connected with the working medium container, the 5th valve peace
On the 5th pipeline, by being configured in the first pipeline of the 5th valve regulation and the second pipeline of pressure discharge operations
Pressure medium according to different dynamic source situation, correspondingly completes the pressure discharge operations of gas working dielectric and liquid-working-medium.
8. the sealing element degradation system as described in claim 1 to 5 is any, it is characterised in that：The Power Component is the
One pneumatic element and the second pneumatic element, each pneumatic element is for being pressurized working media, each pneumatic element
Connection is used as the working medium container of accumulator accordingly respectively, so as to which pipeline inner pressure be prevented to fluctuate；5th pipeline one
End couples respectively with the first pipeline and the second pipeline, and the other end of the 5th pipeline is connected with the working medium container, institute
The 5th valve is stated on the 5th pipeline, passes through the medium pressure in the first pipeline of the 5th valve regulation and the second pipeline
Power.
9. a kind of sealing element aging testing method, it is characterised in that：Specific steps include：
Step 1: at least a pair of seal members tested is mounted at least a pair of of groove of spool outer wall；In advance
Set initial pressure value, operating temperature value and working pressure；The initial pressure value is less than working pressure；
Step 2: if working media is liquid, the 4th valve and the 5th valve are closed, opens the first valve, the second valve and third valve, is opened
Pneumatic element carries out vacuumize process to outer barrel and sealing element tooling valve core cavity, closes third valve and closing after the completion
Pneumatic element；
Step 3: the initial pressure value before not heated under pre-setting the room temperature of working media；The 4th valve is opened, is started
After dynamical element is to outer barrel and sealing element tooling valve core cavity injection working media, the 4th valve is closed, simultaneously closes off power
Element；
Step 4: by aging temperature simulation box carry out warming temperature, start ageing environment simulation box, outer barrel by heat-conducting type not
Rust steel is contacted with ageing environment simulation box, and outer barrel temperature is identical with the temperature inside the box, and the temperature inside the box is simulated by adjusting aging temperature,
Warming operation is kept until the temperature value of sealing element tooling inner cavity reaches the operating temperature value of setting；
Step 5: the pressure and outer barrel of the working media of sealing element tooling inner cavity are judged by first pressure gauge and second pressure gauge
Whether the pressure of working media interior and outside sealing element tooling is more than preset working pressure；
Step 6: when pressure medium is more than the working pressure of setting, opens the 5th valve and carry out pressure regulation until working media pressure
Power is restored to the working pressure of setting, closes the first valve and the second valve and the 5th valve；
Step 7: when pressure medium be less than setting working pressure when, start dynamical element, open the first valve, the second valve and
4th valve is filled with working media until pressure reaches the working pressure of setting, is then shut off dynamical element, the first valve, second
Valve and the 4th valve；
Step 8: the start recording degradation time, when test period reaches preset duration or sealing element tooling chamber pressure
Less than the working pressure of setting, ageing failure occurs for judgement at least a pair of seal members.
10. sealing element aging testing method as claimed in claim 9, it is characterised in that：The initial pressure value is work pressure
The 10%-20% of force value.
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