CN103674521B - A kind of compensator verification method based on divided working status design - Google Patents
A kind of compensator verification method based on divided working status design Download PDFInfo
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- CN103674521B CN103674521B CN201310611724.5A CN201310611724A CN103674521B CN 103674521 B CN103674521 B CN 103674521B CN 201310611724 A CN201310611724 A CN 201310611724A CN 103674521 B CN103674521 B CN 103674521B
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Abstract
The invention discloses a kind of compensator verification method based on divided working status design, first determine the absolute compensation rate under the each operating mode of compensator; The absolute compensation rate of maximum that the absolute compensation rate of maximum of i operating mode is i-1 operating mode adds the design maximum compensation rate of i operating mode, and the absolute compensation rate of minimum that the absolute compensation rate of minimum of i operating mode is i-1 operating mode adds the minimal design compensation rate of i operating mode; Then according to absolute compensation rate, operating pressure, the structural parameters of compensator and the mechanical index of compensator material, calculate buckling pressure, strength check value and the Calculation of Fatigue Life value of compensator; Last according to the Fatigue life design required value of each operating mode, and Calculation of Fatigue Life value under each operating mode is calculated damage factor; Judge according to damage factor whether design of Compensator meets the demands, if met the demands, carry out fatigue test. The inventive method is easy to implement, applicability is strong, the degree of accuracy is high.
Description
Technical field
The present invention relates to a kind of compensator verification method based on divided working status design.
Background technology
As shown in Figure 1, compensator is generally made up of bellows 1 and joint 2. Compensator checking is mainly testedWhether the structural parameters of card bellows meet various working condition requirements.
The in-service model of comparing, larger at the novel vehicle tank grinding, pressurizing transmission system pipe-line system alsoLonger and more complicated, therefore the design of Compensator of bearing piping work compensation and temperature compensation function is proposedHigher requirement. Correspondingly, adopt the superpose determined design objective of method of each operating mode of original envelope,Many times all can not design the compensator that meets actual production technological requirement. Compensator test mainly comprisesThe projects such as withstand voltage, flexing, fatigue. The compensator demonstration test of in the past carrying out is all to enter under single working conditionOK. Single operating mode checking refers in the same class test of same product, and operating pressure is constant, warm areaConstant, compensation rate is constant. Divided working status design is due to according to compensator residing different operating in the work periodCondition is carried out design, equally also requires test method to depart from single operating mode checking in the past, but carries out multiplex (MUX)The checking of condition. Therefore, need to develop a kind of practicable multi-state verification method, with to according to divided working statusThe compensator of design is carried out proving test.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of simple, be applicable to practical application based on pointThe compensator verification method of operating condition design.
The present invention includes following technical scheme:
Based on a compensator verification method for divided working status design, described compensator successively experiences K operating mode,Each operating mode has design compensation amount corresponding to this operating mode, Fatigue life design required value, operating pressure and workMake temperature, described design compensation amount comprises minimal design compensation rate and design maximum compensation rate, comprises following stepRapid:
(1) determine the absolute compensation rate under the each operating mode of compensator;
Described absolute compensation rate comprises maximum definitely compensation rate and minimum definitely compensation rate, first operating mode absolutelyBe the design compensation amount of this operating mode to compensation rate, the absolute compensation rate of maximum of i operating mode is i-1 workThe absolute compensation rate of maximum of condition adds the design maximum compensation rate of i operating mode, and the minimum of i operating mode is absoluteCompensation rate is the minimal design compensation rate that the absolute compensation rate of the minimum of i-1 operating mode adds i operating mode,I=2 to K;
(2) under each operating mode, according to the structural parameters of absolute compensation rate, operating pressure, compensator and benefitRepay the mechanics of materials material of device, calculate buckling pressure, strength check value and the Calculation of Fatigue Life value of compensator;
(3) under each operating mode, judge whether the buckling pressure of compensator, intensity meet the demands,
In the time that all operating modes all meet the demands, the Calculation of Fatigue Life value of record compensator under each operating mode,And proceed to step (4);
Otherwise the structural parameters of adjustment compensator, then proceed to step (2);
(4) whether meet the demands the fatigue life that judges compensator,
If the Fatigue life design required value of each operating mode is respectively n1、n2、n3……nK, under each operating modeCalculation of Fatigue Life value is respectively N1、N2、N3……NK, damage factor
In the time of D < 1, design of Compensator meets the demands, and proceeds to step (5);
Otherwise the structural parameters of adjustment compensator, then proceed to step (2).
(5) under each operating mode, compensator is carried out to fatigue test, judge whether compensator meets fatigue behaviourRequirement;
Under each operating mode, compensator is carried out to the process of fatigue test as follows: compensator one end is fixed, anotherOne end stretches taking drift as starting point or compresses, and compensator is applied to the operating temperature under this operating mode,Apply operating pressure corresponding to this operating mode in compensator inside, according to the absolute compensation rate of the maximum under this operating mode andMinimum definitely compensation rate stretches to compensator or compresses; The number of times stretching or compress is under this operating mode4 times of Fatigue life design required value; In the time that compensator does not occur revealing, think that compensator meets tiredLabor performance requirement.
The present invention compared with prior art tool has the following advantages:
The inventive method is implemented comparatively easy, and test coverage is strong, is a kind of delivery fire of applicable practical applicationArrow compensator verification method. Carry out the verification method of the compensator of compensator Fatigue Test Design according to divided working statusIt is a difficult problem always. Because the external factor such as the temperature under different operating modes, pressure, compensation rate are all different,If compensator is carried out fatigue test according to circulating successively operating mode order and corresponding fatigue life, need repeatedly to followRing environment loads, and not only increases experimentation cost but also has a strong impact on test progress. Therefore relatively easy methodBe that every kind of operating mode is only carried out to a secondary environment loading, but the method again can not be by the test of single test operating modeNumber of times arranges too highly, avoids product to cross examination and loses efficacy. Fatigue test method involved in the present invention fillsDivide the compensator feature of considering test itself and divided working status design, on the basis that ensures comprehensive checking design objectiveUpper, rationally merge or refinement experimental condition the accurate reflection of guarantee test data to design work.
Brief description of the drawings
Fig. 1 is compensator structure schematic diagram;
Fig. 2 is the compensator verification method flow chart based on divided working status design of the present invention.
Detailed description of the invention
Just by reference to the accompanying drawings the present invention is described further below.
Compensator successively experiences K operating mode, and each operating mode has this operating mode corresponding design compensation amount, fatigueLife Design required value, operating pressure and operating temperature, described design compensation amount comprises minimal design compensation rateWith design maximum compensation rate, as shown in Figure 2, a kind of compensator checking based on divided working status design of the present inventionMethod, comprises the steps:
(1) determine the absolute compensation rate under the each operating mode of compensator
Described absolute compensation rate comprises maximum definitely compensation rate and minimum definitely compensation rate, first operating mode absolutelyBe the design compensation amount of this operating mode to compensation rate, the absolute compensation rate of maximum of i operating mode is i-1 workThe absolute compensation rate of maximum of condition adds the design maximum compensation rate of i operating mode, and the minimum of i operating mode is absoluteCompensation rate is the minimal design compensation rate that the absolute compensation rate of the minimum of i-1 operating mode adds i operating mode,I=2 to K. Design compensation amount and definitely compensation rate comprise axially, radially with angle compensation amount.
(2) under each operating mode, according to the structural parameters of absolute compensation rate, operating pressure, compensator and benefitRepay the mechanical index of equipment material, calculate buckling pressure, strength check value and the Calculation of Fatigue Life value of compensator;Circular is prior art, can be referring to the general skill of GB/T12777-2008 metal corrugated pipe expansion jointArt condition. The buckling pressure of compensator comprises post buckling pressure and face buckling pressure. Described strength check value bagDraw together the circumferential membrane stress σ of bellows straight section that pressure causes1, the circumferential membrane stress of bellows that pressure causesσ2, the bellows meridian that pressure causes is to membrane stress σ3The bellows meridian causing with pressure is to bending stressσ4。
(3), under each operating mode, judge whether the buckling pressure of compensator, intensity meet the demands.
When post buckling pressure >=operating pressure, when face buckling pressure >=operating pressure, the buckling pressure of compensator is fullFoot requirement.
Work as σ1≤σb，σ2≤σb，σ3+σ4≤1.5×σbTime, the intensity of compensator meets the demands.
In the time that all operating modes all meet the demands, the Calculation of Fatigue Life value of record compensator under each operating mode,And proceed to step (4);
Otherwise the structural parameters of adjustment compensator, then proceed to step (2);
(4) whether meet the demands the fatigue life that judges compensator,
If the Fatigue life design required value of each operating mode is respectively n1、n2、n3……nK, under each operating modeCalculation of Fatigue Life value is respectively N1、N2、N3……NK, damage factor
In the time of D < 1, design of Compensator meets the demands, and finishes;
Otherwise the structural parameters of adjustment compensator, then proceed to step (2).
The structural parameters of compensator comprise external diameter, straight flange external diameter, the pitch of waves, wave height, the number of plies and bed thickness, materialMechanics parameter comprises elastic modelling quantity, yield strength and tensile strength.
(5) under each operating mode, compensator is carried out to fatigue test, judge whether compensator meets fatigue behaviourRequirement;
Under each operating mode, compensator is carried out to the process of fatigue test as follows: compensator one end is fixed, anotherOne end stretches taking drift as starting point or compresses, and compensator is applied to the operating temperature under this operating mode,Apply operating pressure corresponding to this operating mode in compensator inside, according to the absolute compensation rate of the maximum under this operating mode andMinimum definitely compensation rate stretches to compensator or compresses; The number of times stretching or compress is (under this operating modeThe number of times of fatigue test) be 4 times of Fatigue life design required value under this operating mode; When compensator does not go outWhile now leakage, think that compensator meets fatigue behaviour requirement.
The object of testing fatigue work is to test compensator and under the applying working condition of regulation, completes regulation compensation meritThe ability of energy, it need to apply temperature, pressure and displacement to compensator. Due to three variations of different operating modes because ofIt is larger that element differs, and therefore adopts divided working status to test and increase the method for safety coefficient. Each operating mode need be carried outFatigue test number of times is 4 times of its projected life, i.e. 4N1、4N2，4NK. Compensator order experiences KAfter environment examination, think and meet fatigue behaviour requirement.
Embodiment
Before taking compensator, successively experience assemble, is tested, annotates, penetrates below, five operating modes of flying are as example, rightVerification method of the present invention is introduced, and in this embodiment, the initial structural parameters of compensator are: external diameter φ100mm, straight flange external diameter φ 80mm, pitch of waves 10mm, 10 of wave numbers, 2 layers of the numbers of plies, bed thickness 0.3mm; RippleLine tube material 1Cr18Ni9Ti, the mechanical index of this material is as shown in table 1. In the present embodiment, each operating modeKnown quantity and calculated value as shown in table 2, by adopting verification method of the present invention, verify that this compensator establishesMeter meets the demands.
The mechanical index of table 11Cr18Ni9Ti
| Yield strength (MPa) | Tensile strength (MPa) | Elastic modelling quantity (GPa) | |
| 80K | 380 | 1625 | 214 |
| Normal temperature | 205 | 520 | 198 |
| 500K | 135 | 460 | 173 |
The known quantity that each operating mode of table 2 is corresponding and result of calculation
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (1)
1. the compensator verification method based on divided working status design, described compensator successively experiences K workCondition, each operating mode has design compensation amount corresponding to this operating mode, Fatigue life design required value, operating pressureAnd operating temperature, described design compensation amount comprises minimal design compensation rate and design maximum compensation rate, its featureBe, comprise the steps:
(1) determine the absolute compensation rate under the each operating mode of compensator
Described absolute compensation rate comprises maximum definitely compensation rate and minimum definitely compensation rate, first operating mode absolutelyBe the design compensation amount of this operating mode to compensation rate, the absolute compensation rate of maximum of i operating mode is i-1 workThe absolute compensation rate of maximum of condition adds the design maximum compensation rate of i operating mode, and the minimum of i operating mode is absoluteCompensation rate is the minimal design compensation rate that the absolute compensation rate of the minimum of i-1 operating mode adds i operating mode,I=2 to K;
(2) under each operating mode, according to the structural parameters of absolute compensation rate, operating pressure, compensator and benefitRepay the mechanics of materials material of device, calculate buckling pressure, strength check value and the Calculation of Fatigue Life value of compensator;
(3) under each operating mode, judge whether the buckling pressure of compensator, intensity meet the demands,
In the time that all operating modes all meet the demands, the Calculation of Fatigue Life value of record compensator under each operating mode,And proceed to step (4);
Otherwise the structural parameters of adjustment compensator, then proceed to step (2);
(4) whether meet the demands the fatigue life that judges compensator,
If the Fatigue life design required value of each operating mode is respectively n1、n2、n3……nK, under each operating modeCalculation of Fatigue Life value is respectively N1、N2、N3……NK, damage factor
In the time of D < 1, design of Compensator meets the demands, and proceeds to step (5);
Otherwise the structural parameters of adjustment compensator, then proceed to step (2);
(5) under each operating mode, compensator is carried out to fatigue test, judge whether compensator meets fatigue behaviourRequirement;
Under each operating mode, compensator is carried out to the process of fatigue test as follows: compensator one end is fixed, anotherOne end stretches taking drift as starting point or compresses, and compensator is applied to the operating temperature under this operating mode,Apply operating pressure corresponding to this operating mode in compensator inside, according to the absolute compensation rate of the maximum under this operating mode andMinimum definitely compensation rate stretches to compensator or compresses; The number of times stretching or compress is under this operating mode4 times of Fatigue life design required value; In the time that compensator does not occur revealing, think that compensator meets tiredLabor performance requirement.
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| CN107330208B (en) * | 2017-07-06 | 2021-09-24 | 沈阳透平机械股份有限公司 | Analysis method for stator part of supercharger |
| CN110146261B (en) * | 2019-04-10 | 2022-12-09 | 中国电力科学研究院有限公司 | Method and system for testing cycle life of expansion joint for high-voltage combined electrical appliance |
| CN111929427B (en) * | 2020-07-01 | 2023-04-07 | 中国核电工程有限公司 | Rubber expansion joint performance test verification method |
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| CN102980808A (en) * | 2011-09-06 | 2013-03-20 | 上海航天精密机械研究所 | Corrugated pipe expansion joint internal pressure bursting test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07280695A (en) * | 1994-04-11 | 1995-10-27 | Sumitomo Electric Ind Ltd | Method for detecting leakage oil and water immersion of power cable |
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| SU748159A2 (en) * | 1978-02-13 | 1980-07-15 | Предприятие П/Я А-7755 | Stand for testing sylphons |
| CN1501057A (en) * | 2000-08-07 | 2004-06-02 | 湖南省资兴市东屋机电制造有限责任公 | Method for testing sealing of corrugation expansion joint being beared with external pressure and apparatus thereof |
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