CN109975008A - A kind of valve storage test design method - Google Patents
A kind of valve storage test design method Download PDFInfo
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- CN109975008A CN109975008A CN201910187826.6A CN201910187826A CN109975008A CN 109975008 A CN109975008 A CN 109975008A CN 201910187826 A CN201910187826 A CN 201910187826A CN 109975008 A CN109975008 A CN 109975008A
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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
Abstract
The invention discloses a kind of valve storage test design methods, establish valve storage test design criteria, identify the weak link for influencing valve storage period, choose typical single machine product and carry out whole valve storage test, improve valve storage period assessment efficiency；Valve storage test test item, test period and testing sequence are specified simultaneously.The present invention solves the problems, such as the versatility of valve storage test method, has opened up the application field of valve storage test method；The selection principle of valve storage test test item of the present invention simultaneously can guarantee that storage test covers valve full working scope, life cycle management, solve test funds, multi-cycle finite, it is difficult to carry out the problem of storage test comprehensively.
Description
Technical field
The present invention relates to a kind of valve storage test design methods applied to carrier rocket, belong to the assessment of valve storage period
Field.
Background technique
Valve is one of the significant components of liquid rocket pressurizing transmission system, and function mainly executes fluid media (medium) access
Opening and closing, commutation, adjust working fluid flow and pressure and protection system safety etc..Have by function point: the excessive valve of peace,
Charging valve, overflow clearly valve, electric detonation valve, manual switch, check valve, pressure reducer, voltage-stablizer, filter and valve are spare
Lid.
Valve internal structure is more complex, mainly by hardware, non-metallic seal and elasticity/sensing element structure
At.Hardware mainly realizes the functions such as the pressure-bearing of valve, guiding；Non-metallic seal mainly realizes the sealing function of valve
Energy；Elasticity, sensing element are mainly that valve provides sealing force, or as experiencing working fluid pressure and carry out the group of signal transmitting
Part.
Large quantities of valve products are existing after delivering to have exceeded service life.In this context, carry out valve to lengthen the life research, holding
Its technical performance extends product storage period, improves the fighting efficiency of rocket.But because valve type, raw material are various, function,
Internal structure is complicated, it is difficult to carry out storage test and storage period assessment comprehensively.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of valve storage test design side
Method solves the problems, such as the versatility of valve storage test method, opens up the application field of valve storage test method.
The technical solution of the invention is as follows:
A kind of valve storage test design method, includes the following steps:
(1) valve storage test design criteria is established；
(2) weak link analysis is carried out to valve, determines weak link；
(3) according to weak link, valve storage test method is determined；
(4) valve storage test test item is determined；
(5) valve storage test test period is determined；
(6) valve storage test testing sequence is determined；
(7) failure during storage test is excluded.
In the step (1), valve storage test design criteria is as follows:
(1.1) after valve and its zero parts are delivered, meet the storage designed under storage environment, be considered as field storage examination
It tests；
(1.2) valve for having propellant compatibility to require carries out laboratory simulation media-resistant storage test；
(1.3) when the practical period of storage of valve is less than storage period 3 years or more needed, accelerated storage test is carried out；
(1.4) when store materials information is not comprehensive, material grade storage test is carried out；
(1.5) when valve storage information is not comprehensive, on the basis of material grade storage test, valve storage test is carried out；
(1.6) zero parts storage test is first carried out when necessary, then carries out valve storage test.
In the step (1.3), the selection principle of accelerated storage test condition are as follows:
Do not change the agine mechaism of material, does not increase new failure mechanism and failure mode；
Test temperature is lower than the maximum operation (service) temperature that valve products can bear；
Practical storage environment experimental condition based on product formulates accelerated storage test condition；
Valve internal typical case's nonmetallic materials are determined as accelerated storage sensitive material, determine and accelerate storage
Dis environment avoids influencing other components because of the period of the day from 11 p.m. to 1 a.m.
When carrying out field storage test, laboratory simulation test, preferentially chooses whole valve testpieces and carry out whole valve performance test.
In the step (2), valve weak link includes two class of whole valve grade and component level, and for function, complicated, operating condition is disliked
Bad and representative valve, using its whole valve as weak link；Component level chooses following key component as weak ring
Section:
Sealing element；
Load elastic element；
Sensing element；
Zero parts contacted with corrosive environments such as propellant, salt fogs.
The realization process of the step (3) is as follows:
(3.1) according to the valve weak link of selection, the storage information of valve, zero parts and associated materials is collected, in advance
Estimate valve storage life, the valve storage life such as estimated is more than storage period, then enters (3.2)；If being unsatisfactory for, need to improve thin
Weak link, until estimating storage life can satisfy storage period requirement, into (3.2)；
(3.2) according to the existing storage information of testpieces and the valve storage life estimated, and combine the valve chosen weak
Link determines following storage test method:
Preferential selection field storage test method, when condition does not allow, is store using laboratory simulation
Deposit test method；
Experimental condition has, using accelerated storage test method；
(3.3) multiple action test is carried out to assessment sample, reduces the demand to assessment sample size.
The realization process of the step (4) is as follows:
(4.1) clear storage test test parameter selection principle；
(4.2) determine that the test item before storage test starts and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Contour dimension, connection size；
Screw-down torque inspection；
(4.3) determine that test item during storage test and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Check and accept grade performance test；
(4.4) determine that test item after storage test and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Identify grade performance test；
Screw-down torque inspection；
Material physical and chemical performance analysis.
Storage test test parameter selection principle is as follows in the step (4.1):
The sensitive performance parameter of reflection storage test part variation is chosen as test item, and storage test starts preceding and mistake
Test item in journey should be nondestructive.
In the step (5), determined according to the valve storage life and storage test part performance estimated during testing
Test period.
In the step (6), storage test testing sequence is determined according to following principle:
Repeatable test is first carried out, then carries out not reproducible test and destructive testing；
Material sample test is first carried out, then carries out zero parts test, finally carries out valve test.
Compared with prior art, the invention has the following beneficial effects:
1, the invention proposes valve storage test accurate definitions, and establish valve storage test design criteria, solve
The versatility problem of valve storage test method, has opened up the application field of valve storage test method；
2, the invention proposes valve method for analyzing weak link, identification influences the key link of valve storage period, solves
Valve is because of spare part and raw material types are various and function complicated the problem of being difficult to unified storage test method, stores to valve
Design is optimized in test；
3, the invention proposes whole valve storage test methods, analyze valve spare part and material grade storage test and whole valve
Logical relation between storage test chooses typical single machine product and carries out whole valve storage test, improves the assessment of valve storage period
Efficiency；
4, the present invention establishes the selection principle of valve storage test test item, guarantees that storage test covers the full work of valve
Condition, life cycle management solve test funds, multi-cycle finite, it is difficult to carry out the problem of storage test comprehensively.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention；
Fig. 2 is valve storage test flow chart in embodiment.
Specific embodiment
It is as shown in Figure 1 flow diagram of the present invention, to the present invention, each step is described in detail below.
1. determining valve storage test design criteria:
The definition of valve storage test:
Valve storage test --- influence, acquisition product for research storage test environmental condition to valve storage life
Can or structural reliability at any time with the changing rule of environmental condition, and for evaluation valve storage period, formulate and optimize valve
And its zero parts working service keeping technical requirements provide according to and carry out test.Storage test product is in inoperative shape
Under state, by predetermined time interval carry out test-based examination, be stored to as defined in the time terminate.
The design of valve storage test should generally follow following criterion:
After A valve and its zero parts are delivered, meeting the storage designed under storage environment, can be considered that field storage tries
It tests.Whole valve performance test is carried out during field storage test.
The valve that B has propellant compatibility to require carries out laboratory simulation media-resistant storage test, in simulation propellant ring
When border, propellant storage state is considered, such as gas phase, liquid phase, pressure.
C carries out accelerated storage when the practical period of storage of valve is less than the storage period needed (general difference was at 3 years or more)
Test, the selection principle of accelerated storage test condition are as follows:
Do not change the agine mechaism of material, does not increase new failure mechanism and failure mode；
Test temperature is lower than the maximum operation (service) temperature that valve products can bear；
Practical storage environment experimental condition based on product formulates accelerated storage test condition.
General valve internal typical case nonmetallic materials (such as rubber dynamic seal) are determined as accelerating storage
Sensitive material is deposited, when determining therefrom that accelerated storage environmental factor, should be avoided influences other components,
As the hot conditions of accelerated storage may make spring that creep occur.
D store materials information is not comprehensive, Ying Jinhang material grade storage test.
E valve storage information is not comprehensive, on the basis of material grade storage test, should also carry out valve storage test.
F can first carry out zero parts storage test when necessary, then carry out valve storage test.
Each zero parts could only experience most true stress after being assembled into whole valve in G valve, therefore only
Whole valve performance test, could most true, most each zero parts in comprehensive examination inside overall characteristics.Carry out field storage examination
It tests, laboratory simulation test (such as media-resistant storage, accelerated storage), should all preferentially choose whole valve testpieces, carry out whole valve
It can test.
2. pair valve carries out weak link analysis
Valve internal structure is more complex, mainly by hardware, non-metallic seal and elasticity/sensing element structure
At.Hardware mainly realizes the functions such as the pressure-bearing of valve, guiding, from the point of view of previous use experience and data, metal knot
Performance is stablized after component part is stored for a long time, can satisfy storage at present and lengthens the life the target of engineering, be not required to carry out longevity assessment and
Lengthen the life work；Non-metallic seal mainly realizes the sealing function of valve, due to the unstability and storage of its raw material itself
It is chronically at force and deformation state in the process, performance is unstable after causing it to store for a long time, is the weak ring that valve is stored for a long time
Section；Elasticity, sensing element are mainly that valve provides sealing force, or as experiencing working fluid pressure and carry out the group of signal transmitting
Part, since processing technology is more complex, reliability is relatively low, and is chronically at force and deformation state during storage, is easy
Phenomena such as generating stress relaxation or stress corrosion cracking, performance is unstable after causing it to store for a long time and valve is stored for a long time
Weak link.
Weak link includes two classes, and one kind is whole valve as weak link, and one kind is certain zero parts conducts of valve
Weak link.
When the whole valve of A is as weak link, take typical single machine selection principle: according to the weak link of valve, structure type,
The factors such as functional performance, applying working condition choose relative complex and representative valve as testpieces.Such as the basic phase of material
Check valve together, exhaust valve, easing valve, generally selection easing valve.Testpieces determination of amount should comprehensively consider test funds, week
The factors such as phase and testpieces individual difference, general no less than 3.
When certain zero parts of B valve are as weak link, pass through the weak ring to valve and its zero parts, material
Section analysis, determines that weak link is as follows:
Sealing element, due to being in stress in the unstability and storage process of raw material itself for a long time
Deformation state, performance is unstable after causing it to store, and influences the dynamic stability and sealing of valve
Function；
Elastic element is loaded, force and deformation state is chronically at during storage, is easy to produce
Stress relaxation influences sealing function and the rated performance parameter drift of valve；
Sensing element is chronically at force and deformation state during storage, is easy to produce stress
Phenomena such as corrosion cracking, reduces valve reliability；
Zero parts contacted with corrosive environments such as propellant, salt fogs are easy because of corrosion impact
The functions such as pressure-bearing, guiding, the sealing of valve；
When not contacting the corrosive environments such as propellant, salt fog, valve storage life generally depends on
The storage life of portion's nonmetallic materials in the inner.
3. determining storage test method
A collects the storage information of valve, zero parts and associated materials, estimates valve according to the valve weak link of selection
Door storage life.Storage life is such as estimated more than storage period, follow-up work can be carried out；It is such as unsatisfactory for that weak link need to be improved, directly
It can satisfy storage period requirement to storage life is estimated.
B estimates storage life according to the existing storage information of testpieces and valve, and combines the valve weak link chosen, really
Determine storage test method:
Preferential selection field storage test method, when condition does not allow, is store using laboratory simulation
Deposit test method；
Experimental condition has, and accelerated storage test method can be used.
C carries out multiple action test (such as fatigue life test) to assessment sample, reduces as far as possible to assessment
The demand of sample size.
4. determining storage test test item
A storage test test parameter selection principle:
The sensitive performance parameter of reflection storage test part variation is chosen as test item, such as whole valve need to carry out performance examination
It tests, fatigue life test, the test of material grade need to test hardness, breaking strength, elongation, compression ratio.Storage test start before and
Test item in the process should be nondestructive.
B storage test start before test item:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages etc.；
Contour dimension, connection size etc.；
Screw-down torque inspection.
Test item during C storage test:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages etc.；
Check and accept grade performance test.
Test item after D storage test:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages etc.；
Identify that grade performance test (should be according to Q/DY227 consider design margin)；
Screw-down torque inspection；
Material physical and chemical performance analysis.
5. determining storage test test period
According to the test period estimated during storage life and storage test part performance determine test, for accelerated storage
Test is it is also contemplated that apply the size of stress.
6. determining storage test testing sequence
Storage test part testing sequence should be determined according to following principle:
Repeatable test is first carried out, then carries out not reproducible test and destructive testing；
Material sample test is first carried out, then carries out zero parts test, finally carries out valve test.7. storage test mistake
Troubleshooting in journey
Storage test part finds failure in testing, and record phenomenon of the failure, analyzing failure cause in detail determines failure mould
Formula formulates troubleshooting measure etc., and writes far.Fault mode is generally comprised with Types Below:
Because test operation does not meet the failure caused by technological document provides；
Failure caused by due to the environmental condition of storage test does not meet test mission book requirement；
Because of failure caused by production or technological reason；
Because of failure caused by design reasons.
Above-mentioned fault mode can continue to store after troubleshooting if do not influenced valve storage life；It otherwise should be in failure
It is tested again after exclusion, pre-stage test result should be rejected.
The present invention is successfully applied to valve and lengthens the life engineering, and have further extended potentiality and work can continuity；
It solves the problems, such as the versatility of valve storage test method, has opened up the application field of valve storage test method, be suitable for machine
Tool class single machine product is lengthened the life, nonmetallic materials material storage period in generation evaluates and newly grinds the evaluation of engineering goods storage period.
Embodiment:
By taking oxygen pacifies and overflows valve as an example, storage test design method is as follows:
Oxygen pacifies the valve that overflows and awing needs to act, and there are also the functional requirements that superpressure opens exhaust while guaranteeing airtight.
Need to adapt to height thermal environment, random vibration environment, antioxidant dielectric corrosion environment.Internal structure is complicated, sensing element
Long-term pressure-bearing, the dynamic seal of carboxyl nitrsofluoro rubber material need to guarantee that antioxidant stores dynamic sealing performance in 6 months
Normally.Therefore, oxygen is pacified to the whole valve of valve that overflows as whole valve grade weak link (testpieces), carboxyl nitrsofluoro rubber sealing element conduct
Component level weak link (testpieces).
Valve storage life is estimated greater than 25 years according to existing information, determines storage period target value 18 years.
6, existing whole valve, 3 are stored 25 years with arrow, and 3 are stored 10 years with arrow；Carboxyl nitrsofluoro rubber sealing
It part 10, has stored 25 years.Storage test process is shown in Fig. 2.
It is specific as follows:
3 have been stored 10 years testpieces with arrow, and storage is considered as field storage test.Field storage test during into
The whole valve performance test of row.Whole valve carries out accelerated storage test to storage period target value 18 years, and whole valve is carried out in accelerated storage test
Performance test is debugged in experimentation.
3 have been stored 25 years testpieces with arrow, and storage is considered as field storage test.Field storage test during into
The whole valve performance test of row.
It completes to extract 3 in the valve that whole valve performance is tested from above-mentioned 6, carries out the storage examination of laboratory simulation media-resistant
It tests, antioxidant is stored 6 months；Separately extract 3 progress fatigue life tests.It completes fatigue life test and laboratory simulation is resistance to
The valve of medium storage test carries out whole valve performance test.
10 carboxyl nitrsofluoro rubber sealing elements carry out material grade storage test, i.e. nonmetallic materials performance test.
Experimental result is evaluated, laboratory report is completed.
The present invention solves the problems, such as the versatility of valve storage test method, has opened up the application of valve storage test method
Field designs storage test by the method for the present invention, can cover valve full working scope, life cycle management, solve test funds, week
Phase is limited, it is difficult to carry out the problem of storage test comprehensively.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (10)
1. a kind of valve storage test design method, it is characterised in that include the following steps:
(1) valve storage test design criteria is established；
(2) weak link analysis is carried out to valve, determines weak link；
(3) according to weak link, valve storage test method is determined；
(4) valve storage test test item is determined；
(5) valve storage test test period is determined；
(6) valve storage test testing sequence is determined；
(7) failure during storage test is excluded.
2. a kind of valve storage test design method according to claim 1, it is characterised in that: in the step (1), valve
Door storage test design criteria is as follows:
(1.1) after valve and its zero parts are delivered, meet the storage designed under storage environment, be considered as field storage test；
(1.2) valve for having propellant compatibility to require carries out laboratory simulation media-resistant storage test；
(1.3) when the practical period of storage of valve is less than storage period 3 years or more needed, accelerated storage test is carried out；
(1.4) when store materials information is not comprehensive, material grade storage test is carried out；
(1.5) when valve storage information is not comprehensive, on the basis of material grade storage test, valve storage test is carried out；
(1.6) zero parts storage test is first carried out when necessary, then carries out valve storage test.
3. a kind of valve storage test design method according to claim 2, it is characterised in that: in the step (1.3),
The selection principle of accelerated storage test condition are as follows:
Do not change the agine mechaism of material, does not increase new failure mechanism and failure mode；
Test temperature is lower than the maximum operation (service) temperature that valve products can bear；
Practical storage environment experimental condition based on product formulates accelerated storage test condition；
Valve internal typical case's nonmetallic materials are determined as accelerated storage sensitive material, when determining accelerated storage environmental factor, keep away
Exempt to influence other components.
4. a kind of valve storage test design method according to claim 3, it is characterised in that: carry out field storage examination
Test, laboratory simulation test when, preferentially choose whole valve testpieces and carry out whole valve performance test.
5. a kind of valve storage test design method according to claim 1, it is characterised in that: in the step (2), valve
Door weak link includes two class of whole valve grade and component level, the valve complicated for function, operating condition is severe and representative, by it
Whole valve is as weak link；Component level chooses following key component as weak link:
Sealing element；
Load elastic element；
Sensing element；
Zero parts contacted with corrosive environments such as propellant, salt fogs.
6. a kind of valve storage test design method according to claim 1, it is characterised in that: the reality of the step (3)
Existing process is as follows:
(3.1) according to the valve weak link of selection, the storage information of valve, zero parts and associated materials is collected, valve is estimated
Door storage life, the valve storage life such as estimated are more than storage period, then enter (3.2)；If being unsatisfactory for, need to improve weak ring
Section, until estimating storage life can satisfy storage period requirement, into (3.2)；
(3.2) according to the existing storage information of testpieces and the valve storage life estimated, and the valve weak link chosen is combined,
Determine following storage test method:
Preferential selection field storage test method, when condition does not allow, using laboratory simulation storage test method；
Experimental condition has, using accelerated storage test method；
(3.3) multiple action test is carried out to assessment sample, reduces the demand to assessment sample size.
7. a kind of valve storage test design method according to claim 1, it is characterised in that: the reality of the step (4)
Existing process is as follows:
(4.1) clear storage test test parameter selection principle；
(4.2) determine that the test item before storage test starts and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Contour dimension, connection size；
Screw-down torque inspection；
(4.3) determine that test item during storage test and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Check and accept grade performance test；
(4.4) determine that test item after storage test and content are as follows:
Appearance: whether there is or not deformation, corrosion, mould, leakage, crackle and damages；
Identify grade performance test；
Screw-down torque inspection；
Material physical and chemical performance analysis.
8. a kind of valve storage test design method according to claim 7, it is characterised in that: in the step (4.1)
Storage test test parameter selection principle is as follows:
Choose the sensitive performance parameter of reflection storage test part variation and be used as test item, and storage test start before in the process
Test item be nondestructive.
9. a kind of valve storage test design method according to claim 1, it is characterised in that: in the step (5), root
The test period during test is determined according to the valve storage life and storage test part performance estimated.
10. a kind of valve storage test design method according to claim 1, it is characterised in that: in the step (6),
Storage test testing sequence is determined according to following principle:
Repeatable test is first carried out, then carries out not reproducible test and destructive testing；
Material sample test is first carried out, then carries out zero parts test, finally carries out valve test.
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| CN113125149A (en) * | 2021-04-16 | 2021-07-16 | 中国航空综合技术研究所 | Method for evaluating service life of aviation movement hinge mechanism under corrosion condition and test device thereof |
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