CN108088786A - A kind of 0 type sealing ring aging life-span test method of rubber system - Google Patents
A kind of 0 type sealing ring aging life-span test method of rubber system Download PDFInfo
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- CN108088786A CN108088786A CN201711274817.8A CN201711274817A CN108088786A CN 108088786 A CN108088786 A CN 108088786A CN 201711274817 A CN201711274817 A CN 201711274817A CN 108088786 A CN108088786 A CN 108088786A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Abstract
The present invention is a kind of 0 type sealing ring aging life-span test method of rubber system, this method includes failure criteria experiment and accelerated life test, sealing ring exemplar is grouped by failure criteria experiment, it is respectively put into the ageing oven with gradient temperature characteristic, carry out high temperature ageing, compression recovers, measure sealing ring compression set rate, accelerated life test is by the way that a certain number of sealing ring exemplars are grouped, and it is assemblied in by test requirements document with sealing ring product in dielectric testing frock, respectively under the gradient temperature load less than sealing ring tolerance high temperature limit, Xun Huan carries out high temperature ageing, compression recovers, measure the work of sealing ring compression set rate, until every group of sealing ring exemplar compression set rate for having more than 50% reaches failure criteria.This method can accurately and effectively predict sealing ring service life, and the normal operation for ensureing mechanical equipment is most important.
Description
Technical Field
The invention discloses a method for testing the aging life of an O-shaped sealing ring made of rubber, and belongs to the field of reliability and life prediction of mechanical equipment.
Background
The sealing ring is installed in the set bus flange plate, and can be extruded by the connecting flange plate to bear the action of pressure stress caused by extrusion, so as to generate deformation. After long-time use, the sealing ring is aged due to the action of the use environment and stress, the sealing performance of the sealing ring is degraded continuously, the deformation degree is increased continuously, the surface of the sealing ring is hardened gradually, the elastic performance is reduced, and the deformation recovery capability is weakened gradually until the sealing is failed. Therefore, the service life of the sealing ring is accurately and effectively predicted, and the method is very important for guaranteeing the normal operation of mechanical equipment. As the sealing rings are mostly products with high reliability and long service life, the traditional service life test method has long test period, high cost and poor precision.
Disclosure of Invention
The invention provides a test method for the aging life of a rubber 0-type sealing ring, which is designed and provided aiming at overcoming the defects in the prior art, and aims to realize the rapid prediction of the service life of O-type rubber sealing rings with various sizes and materials.
The purpose of the invention is realized by the following technical scheme:
in the aging life test method of the O-shaped sealing ring made of rubber, the rubber material is ethylene propylene diene monomer, and the method is characterized in that: the method comprises the following steps:
the method comprises the following steps of firstly, carrying out a failure criterion test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
1.1, selecting 3 sealing ring sample pieces, placing the sealing ring sample pieces in a sealing groove (2) of a flange plate (1), and assembling the flange plate (1) and a flange plate cover plate (3) together through bolts;
1.2, placing the test piece assembled in the step 1.1 into a high-temperature aging box, heating to 130 ℃, preserving heat for 24 hours, taking out the test piece from the high-temperature aging box, taking out 3 sealing ring sample pieces, and standing for 24 hours at normal temperature;
1.3, measuring the thickness of 3 sealing ring samples by using a rubber thickness gauge, and calculating the compression permanent deformation values of the 3 sealing ring samples;
1.4, repeating the steps 1.1, 1.2 and 1.3 until the compression permanent deformation of 3 sealing ring samples respectively reaches 50%, 60% and 70%;
in the test, when the compression set value of 3 sealing ring samples reaches 50%, stopping the test of the sealing ring samples with small compression set values, continuously repeating the steps 1.1, 1.2 and 1.3 on the other 2 sealing ring samples, when the compression set value of 2 sealing ring samples reaches 60%, stopping the test of the sealing ring samples with small compression set values, and continuously repeating the steps 1.1, 1.2 and 1.3 on the last 1 sealing ring samples until the compression set value reaches 70%.
1.5, reassembling the 3 sealing ring sample pieces according to the mode of the step 1.1, performing helium leak detection, and selecting the minimum value of compression permanent deformation in a qualified product for leak detection as an invalidation standard;
if the leak detection results of the 3 sealing ring samples are not qualified, after the compression permanent deformation value in the step 1.4 is reduced, the steps 1.1, 1.2, 1.3 and 1.4 are repeated until at least 1 of the 3 sealing ring samples is qualified in leak detection;
step two, carrying out an accelerated life test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
2.1 selecting four groups of sealing ring samples, wherein the number of each group is the same, and measuring the thickness of the sealing ring samples by using a rubber thickness gauge as an initial test value of each sealing ring sample;
2.2 assembling each seal ring sample piece in the same way as the step 1.1;
2.3, respectively placing the four groups of sealing ring samples into high-temperature ageing boxes, respectively heating the four high-temperature ageing boxes to 125 ℃, 130 ℃, 135 ℃ and 140 ℃, keeping the temperature for 24 hours, taking out the test piece from the high-temperature ageing boxes, taking out each sealing ring sample, and standing for 24 hours at normal temperature;
2.4, measuring the thickness of each seal ring sample by using a rubber thickness gauge and recording the compression permanent deformation value of each seal ring sample, wherein in the test, when more than 50 percent of the 4 groups of seal ring samples have compression permanent deformation reaching the group of failure standards, the group of tests is stopped, and otherwise, the steps 2.1, 2.2 and 2.3 are repeated;
2.5 calculating the average value of the compression set value of each group of sealing ring samples, substituting the average value of the heat preservation temperature, the heat preservation time and the compression set of each group of sealing ring samples into a rubber material performance degradation model formula (1):
in the formula: t is the aging time of the rubber material; epsilon is the compression permanent deformation of the rubber sealing ring after the aging time t; 1-epsilon is the retention rate of the compression set of the rubber sealing ring after the degradation of t time; b is a test constant; k is an aging speed constant related to temperature, constants B and K can be obtained by a least square fitting test degradation parameter, alpha is an aging constant, and alpha is more than 0 and less than 1;
and acceleration model formula (2):
in the formula: k is a temperature dependent aging rate constant;
t is the thermodynamic temperature;
E. a and R are constants related to test conditions and can be obtained by fitting test data.
If the measured data in the two subsequent adjacent acquisition intervals is more than 5%, the high-temperature loading time is properly shortened to 12h, and otherwise, the high-temperature loading time is kept unchanged for 24 h. And if the measured data in the two adjacent acquisition intervals is less than 1%, properly prolonging the high-temperature loading time to 36h, and recording test data.
The technical scheme of the invention has the following beneficial effects:
1. establishing a relation between the product-level service life of the rubber O-shaped sealing ring and a product performance degradation parameter, thereby accurately predicting the service life of the O-shaped sealing ring product for the actual project;
2. the practical service life of the sealing ring product is established on the test results of a large number of sealing ring samples, so that the limitation of the geometric dimensions of different sealing ring products is eliminated;
3. aiming at the difference of the geometric dimensions of the sealing ring sample piece and the sealing ring for the actual project, carrying out a dimension chain effect verification test, and correcting the accelerated life test result of the sealing ring sample piece;
4. and (3) applying the corrected Arrhenius accelerated life model to accurately and effectively predict the service life of the sealing ring product grade according to the test result of the sealing ring sample grade.
Drawings
FIG. 1 is a schematic view of a clamp used in the present invention
Detailed Description
The technical scheme of the invention is further detailed in the following by combining the drawings and the embodiment:
the rubber material in the aging life test method of the rubber 0-type sealing ring is ethylene propylene diene monomer, and is characterized in that: the method comprises the following steps:
the method comprises the following steps of firstly, carrying out failure criterion test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
1.1, selecting 3 sealing ring sample pieces, placing the sealing ring sample pieces in a sealing groove (2) of a flange plate (1), and assembling the flange plate (1) and a flange plate cover plate (3) together through bolts (4), as shown in the attached drawing 1;
1.2, placing the test piece assembled in the step 1.1 into a high-temperature aging box, heating to 130 ℃, preserving heat for 24 hours, taking out the test piece from the high-temperature aging box, taking out 3 sealing ring sample pieces, and standing for 24 hours at normal temperature;
1.3, measuring the thickness of 3 sealing ring samples by using a rubber thickness gauge, and calculating the compression permanent deformation values of the 3 sealing ring samples;
1.4, repeating the steps 1.1, 1.2 and 1.3 until the compression permanent deformation of 3 sealing ring samples respectively reaches 50%, 60% and 70%;
1.5 reassembling the 3 sealing ring samples according to the mode of the step 1.1, performing helium leak detection, and selecting the minimum value of compression permanent deformation in a product qualified in leak detection as a failure standard;
if the leak detection results of the 3 sealing ring samples are not qualified, after the compression permanent deformation value in the step 1.4 is reduced, the steps 1.1, 1.2, 1.3 and 1.4 are repeated until at least 1 of the 3 sealing ring samples is qualified in leak detection;
step two, carrying out an accelerated life test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
2.1 selecting four groups of sealing ring samples, wherein the number of each group is the same, and measuring the thickness of the sealing ring samples by using a rubber thickness gauge as an initial test value of each sealing ring sample;
2.2 assembling each seal ring sample piece in the same way as the step 1.1;
2.3, respectively placing the four groups of sealing ring samples into high-temperature ageing boxes, respectively heating the four high-temperature ageing boxes to 125 ℃, 130 ℃, 135 ℃ and 140 ℃, keeping the temperature for 24 hours, taking out the test piece from the high-temperature ageing boxes, taking out each sealing ring sample, and standing for 24 hours at normal temperature;
2.4, measuring the thickness of each seal ring sample by using a rubber thickness gauge and recording the compression permanent deformation value of each seal ring sample, wherein in the test, when more than 50 percent of the 4 groups of seal ring samples have compression permanent deformation reaching the group of failure standards, the group of tests is stopped, and otherwise, the steps 2.1, 2.2 and 2.3 are repeated;
2.5 calculating the average value of the compression set value of each group of sealing ring samples, substituting the average value of the heat preservation temperature, the heat preservation time and the compression set of each group of sealing ring samples into a rubber material performance degradation model formula (1):
in the formula: t is the aging time of the rubber material; epsilon is the compression permanent deformation of the rubber sealing ring after the aging time t; 1-epsilon is the compression permanent deformation retention rate of the rubber sealing ring after the degradation of t time; b is a test constant; k is an aging speed constant related to temperature, constants B and K can be obtained by a least square fitting test degradation parameter, alpha is an aging constant, and alpha is more than 0 and less than 1;
and acceleration model formula (2):
in the formula: k is a temperature dependent aging rate constant;
t is the thermodynamic temperature;
E. a and R are constants related to test conditions and can be obtained by fitting test data.
Claims (1)
1. A test method for the aging life of a rubber 0-type sealing ring is characterized in that the rubber material is ethylene propylene diene monomer: the method comprises the following steps:
the method comprises the following steps of firstly, carrying out a failure criterion test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
1.1, selecting 3 sealing ring sample pieces, placing the sealing ring sample pieces in a sealing groove (2) of a flange plate (1), and assembling the flange plate (1) and a flange plate cover plate (3) together through bolts;
1.2, placing the test piece assembled in the step 1.1 into a high-temperature aging box, heating to 130 ℃, preserving heat for 24 hours, taking out the test piece from the high-temperature aging box, taking out 3 sealing ring samples, and standing for 24 hours at normal temperature;
1.3, measuring the thickness of 3 sealing ring samples by using a rubber thickness gauge, and calculating the compression permanent deformation values of the 3 sealing ring samples;
1.4, repeating the steps 1.1, 1.2 and 1.3 until the compression permanent deformation of 3 sealing ring samples reaches 50 percent, 60 percent and 70 percent respectively;
1.5, reassembling the 3 sealing ring sample pieces according to the mode of the step 1.1, performing helium leak detection, and selecting the minimum value of compression permanent deformation in a qualified product for leak detection as an invalidation standard;
if the leak detection results of the 3 sealing ring samples are not qualified, the compression permanent deformation value in the step 1.4 is reduced, and the steps 1.1, 1.2, 1.3 and 1.4 are repeated until at least 1 of the 3 sealing ring samples is qualified in leak detection;
step two, carrying out an accelerated life test on the O-shaped sealing ring made of rubber, wherein the test steps are as follows:
2.1 selecting four groups of sealing ring samples, wherein the number of each group is the same, and measuring the thickness of the sealing ring samples by using a rubber thickness gauge as an initial test value of each sealing ring sample;
2.2 assembling each sealing ring sample piece in the same way as the step 1.1;
2.3, respectively placing the four groups of sealing ring samples into high-temperature ageing boxes, respectively heating the four high-temperature ageing boxes to 125 ℃, 130 ℃, 135 ℃ and 140 ℃, keeping the temperature for 24 hours, taking out the test piece from the high-temperature ageing boxes, then taking out each sealing ring sample, and standing for 24 hours at normal temperature;
2.4, measuring the thickness of each seal ring sample by using a rubber thickness gauge and recording the compression permanent deformation value of each seal ring sample, wherein in the test, when more than 50 percent of the 4 groups of seal ring samples have compression permanent deformation reaching the group of failure standards, the group of tests is stopped, and otherwise, the steps 2.1, 2.2 and 2.3 are repeated;
2.5 calculating the average value of the compression set value of each group of sealing ring samples, substituting the average value of the heat preservation temperature, the heat preservation time and the compression set of each group of sealing ring samples into a rubber material performance degradation model formula (1):
in the formula: t is the aging time of the rubber material; epsilon is the compression permanent deformation of the rubber sealing ring after the aging time t; 1-epsilon is the retention rate of the compression set of the rubber sealing ring after the degradation of t time; b is a test constant; k is an aging speed constant related to temperature, constants B and K can be obtained by a least square fitting test degradation parameter, alpha is an aging constant, and alpha is more than 0 and less than 1;
and acceleration model formula (2):
in the formula: k is a temperature dependent aging rate constant;
t is the thermodynamic temperature;
E. a and R are constants related to test conditions and can be obtained by fitting test data.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572069A (en) * | 2018-06-26 | 2018-09-25 | 中国航空综合技术研究所 | Test device and test method for the experiment of sealing ring aging life-span |
| CN109540719A (en) * | 2018-12-12 | 2019-03-29 | 中国航空综合技术研究所 | Rubber system O-ring seals reciprocation sealing wear-out life test method |
| CN109932308A (en) * | 2019-02-21 | 2019-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Consider the transformer rubber seal permanent compression test method of plateau climate |
| CN110873646A (en) * | 2019-12-03 | 2020-03-10 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| CN114065548A (en) * | 2021-11-30 | 2022-02-18 | 重庆长安新能源汽车科技有限公司 | Method for predicting sealing life of battery pack box cover |
| CN114062232A (en) * | 2021-09-30 | 2022-02-18 | 国高材高分子材料产业创新中心有限公司 | Oven, and automatic measuring system and method for thermal-oxidative aging life of polymer material |
| CN114112248A (en) * | 2022-01-26 | 2022-03-01 | 南通中集能源装备有限公司 | Detection method for qualified sealing life of sealing ring |
| GB2600194A (en) * | 2020-05-12 | 2022-04-27 | Dril Quip Inc | Method of seal validation with pre-treatment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494992A (en) * | 2011-12-13 | 2012-06-13 | 北京航空航天大学 | Accelerated degradation testing method for nitrile rubber O-shaped sealing ring based on step stress |
| CN106124191A (en) * | 2016-08-31 | 2016-11-16 | 中国兵器工业第五九研究所 | A kind of residue lifetime estimation method of rubber seal |
| CN107122563A (en) * | 2017-05-10 | 2017-09-01 | 广东电网有限责任公司电力科学研究院 | A kind of GIS hermetic seals rubber life prediction computational methods and device |
| CN107436963A (en) * | 2016-12-19 | 2017-12-05 | 鲍兆伟 | A kind of O-shaped rubber seal life-span prediction method based on the polynary degeneration of Copula functions |
| CN107436983A (en) * | 2017-07-28 | 2017-12-05 | 南京理工大学 | A kind of O-shaped rubber seal life-span prediction method based on multivariate sample difference |
-
2017
- 2017-12-06 CN CN201711274817.8A patent/CN108088786A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494992A (en) * | 2011-12-13 | 2012-06-13 | 北京航空航天大学 | Accelerated degradation testing method for nitrile rubber O-shaped sealing ring based on step stress |
| CN106124191A (en) * | 2016-08-31 | 2016-11-16 | 中国兵器工业第五九研究所 | A kind of residue lifetime estimation method of rubber seal |
| CN107436963A (en) * | 2016-12-19 | 2017-12-05 | 鲍兆伟 | A kind of O-shaped rubber seal life-span prediction method based on the polynary degeneration of Copula functions |
| CN107122563A (en) * | 2017-05-10 | 2017-09-01 | 广东电网有限责任公司电力科学研究院 | A kind of GIS hermetic seals rubber life prediction computational methods and device |
| CN107436983A (en) * | 2017-07-28 | 2017-12-05 | 南京理工大学 | A kind of O-shaped rubber seal life-span prediction method based on multivariate sample difference |
Non-Patent Citations (3)
| Title |
|---|
| 中国航天科技集团公司: "《航天技能人才操作实践案例 机加、焊接》", 31 March 2014, 中国宇航出版社 * |
| 张凯等: ""O 形三元乙丙橡胶密封圈的使用寿命预测"", 《橡胶工业》 * |
| 肖坤等: "某弹用O 型密封圈热氧老化试验与寿命评估", 《弹箭与制导学报》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572069A (en) * | 2018-06-26 | 2018-09-25 | 中国航空综合技术研究所 | Test device and test method for the experiment of sealing ring aging life-span |
| CN109540719A (en) * | 2018-12-12 | 2019-03-29 | 中国航空综合技术研究所 | Rubber system O-ring seals reciprocation sealing wear-out life test method |
| CN109540719B (en) * | 2018-12-12 | 2021-05-07 | 中国航空综合技术研究所 | Correction test method for wear life model parameters of O-shaped sealing ring made of rubber |
| CN109932308A (en) * | 2019-02-21 | 2019-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Consider the transformer rubber seal permanent compression test method of plateau climate |
| CN110873646A (en) * | 2019-12-03 | 2020-03-10 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| CN110873646B (en) * | 2019-12-03 | 2021-04-23 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| GB2600194A (en) * | 2020-05-12 | 2022-04-27 | Dril Quip Inc | Method of seal validation with pre-treatment |
| US11543372B2 (en) | 2020-05-12 | 2023-01-03 | Dril-Quip, Inc. | Seal validation with chemical pre-treatment |
| CN114062232A (en) * | 2021-09-30 | 2022-02-18 | 国高材高分子材料产业创新中心有限公司 | Oven, and automatic measuring system and method for thermal-oxidative aging life of polymer material |
| CN114062232B (en) * | 2021-09-30 | 2024-02-02 | 国高材高分子材料产业创新中心有限公司 | Automatic measuring system and method for thermal oxidative aging life of baking oven and polymer material |
| CN114065548A (en) * | 2021-11-30 | 2022-02-18 | 重庆长安新能源汽车科技有限公司 | Method for predicting sealing life of battery pack box cover |
| CN114112248A (en) * | 2022-01-26 | 2022-03-01 | 南通中集能源装备有限公司 | Detection method for qualified sealing life of sealing ring |
| CN114112248B (en) * | 2022-01-26 | 2022-05-10 | 南通中集能源装备有限公司 | Detection method for qualified sealing life of sealing ring |
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Application publication date: 20180529 |