CN113654978A - Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof - Google Patents
Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof Download PDFInfo
- Publication number
- CN113654978A CN113654978A CN202110984151.5A CN202110984151A CN113654978A CN 113654978 A CN113654978 A CN 113654978A CN 202110984151 A CN202110984151 A CN 202110984151A CN 113654978 A CN113654978 A CN 113654978A
- Authority
- CN
- China
- Prior art keywords
- sound insulation
- insulation performance
- damping rubber
- oil
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 175
- 238000013016 damping Methods 0.000 title claims abstract description 120
- 229920001971 elastomer Polymers 0.000 title claims abstract description 119
- 239000005060 rubber Substances 0.000 title claims abstract description 119
- 230000001629 suppression Effects 0.000 title claims abstract description 42
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 230000014759 maintenance of location Effects 0.000 claims abstract description 29
- 230000032683 aging Effects 0.000 claims abstract description 27
- 238000013178 mathematical model Methods 0.000 claims abstract description 24
- 238000002791 soaking Methods 0.000 claims abstract description 21
- 230000009467 reduction Effects 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 73
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 230000009466 transformation Effects 0.000 claims description 15
- 229920000459 Nitrile rubber Polymers 0.000 claims description 14
- 229920005557 bromobutyl Polymers 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 11
- 229920001155 polypropylene Polymers 0.000 claims description 11
- 230000003712 anti-aging effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 6
- 239000011257 shell material Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 13
- 238000004073 vulcanization Methods 0.000 description 12
- 238000002955 isolation Methods 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000002994 raw material Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 239000005662 Paraffin oil Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010445 mica Substances 0.000 description 4
- 229910052618 mica group Inorganic materials 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- HLBZWYXLQJQBKU-UHFFFAOYSA-N 4-(morpholin-4-yldisulfanyl)morpholine Chemical compound C1COCCN1SSN1CCOCC1 HLBZWYXLQJQBKU-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 description 1
- 235000019285 ethoxyquin Nutrition 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/445—Rubber
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Immunology (AREA)
- Theoretical Computer Science (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a sound insulation performance evaluation method of oil immersed sound vibration suppression damping rubber and application thereof, wherein the sound insulation performance evaluation method of the oil immersed sound vibration suppression damping rubber comprises the steps of obtaining sound insulation performance of the damping rubber before and after an aging test and calculating to obtain a sound insulation performance retention rate F, establishing a sound insulation performance reduction mathematical model of the damping rubber, substituting data into the mathematical model for calculation, and effectively calculating a relational expression of thermodynamic temperature T, soaking time T and the sound insulation performance retention rate F according to the relational expression of the mathematical model; and obtaining the sound insulation performance of the corresponding damping rubber when the damping rubber is used in the insulating oil at a specific operating temperature for a specific time. The invention can effectively estimate the sound insulation performance of the oil-immersed sound vibration suppression damping rubber under the conditions of different operation times and different operation temperatures, and provides an effective basis for obtaining the damping rubber with excellent durability; and the estimated sound insulation performance is very accurate, and the prediction precision is higher.
Description
Technical Field
The invention relates to the field of noise vibration control, in particular to a method for evaluating sound insulation performance of oil-immersed sound vibration suppression damping rubber and application thereof.
Background
In recent years, the construction of ultrahigh voltage projects in China is rapidly developed, and by the end of 2020, 24 ultrahigh voltage projects of thirteen-alternating-current-eleven-direct-current are built and put into operation in national power grids. Meanwhile, the core technology and equipment localization of the ultra-high voltage power transmission and transformation are also a major breakthrough, but in the aspects of environmental harmony of electrical equipment and the like, short boards which are still to be improved exist, and particularly, the environmental protection problem represented by audible noise is bringing considerable environmental pressure to a power grid. From 2015, the noise control area of the domestic ultrahigh-voltage and extra-high-voltage transformer substation is completely cancelled and is strictly executed according to the noise emission limit requirement of the factory boundary. The converter station of the ultra-high voltage transformer substation is divided into II-type acoustic environment functional areas, and the requirements that the factory boundary noise is not higher than 60dB (A) during daytime and the factory boundary noise is not higher than 50dB (A) during night are met, which is a challenge for meeting the environmental standard of the ultra-high voltage transformer substation.
For considering fire-fighting and noise reduction requirements, the extra-high voltage station generally adopts a sound barrier and a box-in structure without a top cover to carry out noise control, but the engineering cost is high, the low-frequency noise reduction effect is limited, and the body noise reduction technology for sound source equipment gradually becomes the most effective noise reduction scheme. The iron core of sound source equipment such as a transformer, a reactor and the like generates noise vibration during operation and transmits the noise vibration to the oil tank through insulating oil, so that the noise level of the sound source equipment is obviously controlled by improving the noise reduction level of the oil tank.
At present, most equipment manufacturers take a plurality of measures aiming at the oil tank, wherein the measures comprise increasing the rigidity of the oil tank, adding reinforcing ribs, filling sand in the oil tank and the like, but the noise reduction effect is limited. Damping rubber is arranged on the inner wall of the oil tank by part of manufacturers, and the damping rubber and the oil tank form a constraint damping member, so that the overall sound insulation and vibration isolation performance of the oil tank is greatly improved, and the electrical and insulation performance of equipment cannot be influenced. The scheme gradually becomes the research focus of the noise reduction technology of the power transformation equipment body.
However, in the existing research, most of the existing damping rubbers only consider the sound insulation and vibration isolation performance of the existing damping rubbers, but because the damping rubbers need to be soaked in the transformer insulating oil for a long time, the damping rubbers are generally difficult to maintain good sound insulation and vibration isolation performance in the using process; particularly, the service life of the power transformation equipment can be as long as 10 years, but the existing damping rubber can not meet the requirements of sound insulation and vibration isolation performance when reaching the service life of the power transformation equipment.
In addition, when the sound insulation and vibration isolation performance is detected, the aging treatment is generally carried out for a long time at a high temperature, and the sound insulation performance of the oil-immersed sound vibration suppression damping rubber cannot be effectively estimated.
Disclosure of Invention
Therefore, the problem to be solved by the invention is that the sound insulation performance of the oil-immersed sound vibration suppression damping rubber cannot be accurately estimated in the prior art under the conditions of different operation times and different operation temperatures; the method for evaluating the sound insulation performance of the oil-immersed sound vibration suppression damping rubber is provided, and the sound insulation performance of the oil-immersed sound vibration suppression damping rubber in the operation process can be accurately estimated effectively without long-time high-temperature treatment. The invention also discloses a method for adjusting the aging resistance of the damping rubber by using the evaluation method, and the method can effectively adjust the proportion of the damping rubber, so that the obtained damping rubber has more excellent aging resistance, and the aging resistance requirement of the oil-immersed acoustic vibration suppression damping rubber is further met.
An oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method comprises the following steps:
acquiring data: soaking damping rubber in insulating oil, setting a plurality of groups of oil temperatures and a plurality of groups of insulating oil aging test conditions of soaking time, then placing the damping rubber after the aging test and an oil tank shell material in a resistance tube in a combined manner, and testing the sound insulation performance of the damping rubber before and after the aging test; calculating the retention rate F of the sound insulation performance of the damping rubber under different insulating oil aging test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked;
establishing a mathematical model: establishing a sound insulation performance reduction mathematical model of damping rubber, wherein the expression of the mathematical model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant, and R is 8.314J/(mol K); t is the thermodynamic temperature, K; t is the soaking time, h; f is the retention rate of sound insulation performance; b is a material constant;
obtaining a relation formula of sound insulation performance retention rate F of corresponding damping rubber: substituting the data into a mathematical model for calculation, and effectively calculating a relational expression of thermodynamic temperature T, soaking time T and sound insulation performance retention rate F according to the relational expression of the mathematical model;
obtaining the sound insulation performance of the corresponding damping rubber when the damping rubber is used in insulating oil at a specific operating temperature for a specific time: and substituting the operating temperature and the operating time of the insulating oil into a relational expression of the retention rate F of the sound insulation performance to obtain the retention rate F of the sound insulation performance, and multiplying the initial sound insulation performance by the retention rate F of the sound insulation performance to evaluate the sound insulation performance of the damping rubber used for a specific time in the insulating oil at a specific operating temperature.
The test conditions include at least three sets of thermodynamic temperatures for sound insulation performance at different soaking times.
After substituting the data into the mathematical model, origin software was used for the calculations.
The total thickness of the damping rubber is 3-30 mm.
The oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method is applied to the aging resistance adjustment of the damping rubber.
The process of adjusting the aging resistance of the damping rubber comprises the following steps:
testing to obtain near-field noise of the oil-immersed power transformation equipment, mastering 1/3 octave sound pressure level and A weighting sound pressure level of the near-field noise, and determining sound insulation and noise reduction quantity indexes;
obtaining the sound insulation performance of the damping rubber according to the evaluation method, and judging whether the calculated sound insulation performance meets the sound insulation index;
and if the sound insulation index is not met, adjusting the composition and the proportion of the damping rubber until the calculated sound insulation performance meets the sound insulation index.
And calculating the retention rate F of the sound insulation performance with the soaking time of 10 years by adopting a relational expression according to the service life of 10 years, further multiplying the initial sound insulation performance by the retention rate F of the sound insulation performance, calculating the sound insulation performance after 10 years, and judging whether the calculated sound insulation performance meets the sound insulation index.
The technical scheme of the invention has the following advantages:
1. the method for evaluating the sound insulation performance of the oil-immersed sound vibration suppression damping rubber can effectively estimate the sound insulation performance of the damping rubber under the conditions of different running times and different running temperatures, and provides an effective basis for obtaining the damping rubber with excellent durability; and the estimated sound insulation performance is very accurate, and the prediction precision is higher.
2. The invention discloses a method for adjusting the aging resistance of oil-immersed acoustic vibration suppression damping rubber by using the sound insulation performance evaluation method, which can effectively judge whether the sound insulation performance of the damping rubber can meet the requirement of the sound insulation quantity index under the proportioning condition, thereby facilitating the proportioning optimization of the damping rubber, obtaining the damping rubber with better durability and saving the research and development cost.
3. The oil-immersed sound vibration suppression damping rubber obtained by the aging resistance adjusting method disclosed by the invention not only has good damping sound insulation and vibration isolation functions, but also can meet the requirements on sound insulation and vibration isolation performance when the service life of power transformation equipment is reached, and has good aging resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a graph showing the variation of damping factor with temperature of rubber in example 1 of the present invention;
fig. 2 is a noise spectrum of an oil-immersed power transformation apparatus in example 1 of the present invention.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
The oil-immersed acoustic vibration suppression damping rubber is prepared from three structural layers, wherein the 1 st structural layer comprises the following raw materials: 60 parts of nitrile rubber, 20 parts of brominated butyl rubber, 20 parts of polypropylene, 4.5 parts of zinc oxide, 0.5 part of sulfur, 1 part of BLE anti-aging agent, 5 parts of paraffin oil, 1 part of 1, 3-diphenyl guanidine and 10 parts of mica powder.
The preparation method of the oil-immersed acoustic vibration suppression damping rubber comprises the following steps:
1. adding polypropylene and an anti-aging agent into a torque rheometer, setting the temperature at 150 ℃ and the rotating speed at 40r/min for blending for 5 minutes, then adding nitrile rubber, brominated butyl rubber, an activating agent and a plasticizer, continuing blending for 3 minutes, and cooling to obtain a blend.
2. And (3) placing the blend obtained in the step (1) on an upper roll of an open mill, adding a vulcanizing agent, an accelerator and a filler, carrying out open milling to obtain a premix, and then shearing the premix.
3. And (3) placing the fragments prepared in the step (2) in a torque rheometer, setting the temperature at 150 ℃ and the rotating speed at 40r/min, carrying out dynamic vulcanization, obtaining vulcanized pulp after 10 minutes, placing the vulcanized pulp in a flat vulcanizing machine, ensuring that 1/3 full of the depth of a vulcanization mold is filled, and waiting for natural cooling.
4. The blending ratio of the nitrile rubber and the brominated butyl rubber is properly adjusted to obtain the ratio of the 2 nd structural layer to the 3 rd structural layer, which is shown in table 1. And (4) repeating the processing steps of the steps 1-3, respectively preparing vulcanized slurry of the 2 nd structural layer and the 3 rd structural layer, and filling the vulcanizing mold in a flat vulcanizing machine.
TABLE 1
| Layer 2 structure | Layer 3 structure | |
| Fraction of |
60 | 60 |
| Brominated |
30 | 35 |
| Parts of |
30 | 32 |
| Parts of activator | 5 (stearic acid) | 5.5 (organic zinc) |
| Parts of vulcanizing agent | 0.8 | 1 |
| Parts of anti-aging agent | 2(BLE) | 2.5(BLE) |
| Parts of plasticizer | 10 (Paraffin oil) | 10 (Paraffin oil) |
| Parts of Accelerator | 3(1, 3-biphenylguanidine) | 4(1, 3-biphenylguanidine) |
| Parts of filler | 20 (mica powder) | 23 (carbon black) |
5. And setting the vulcanizing temperature of the flat plate to 150 ℃, preheating for 10 minutes, applying 3MPa pressure and keeping for 5 minutes, stopping heating and keeping the pressure for 15 minutes to prepare the damping rubber with the gradient structure.
In the embodiment, a corresponding flat vulcanization forming die is designed according to the thickness of the damping rubber of 3cm, and the oil-immersed acoustic vibration damping rubber with the gradient structure is finally prepared.
The damping rubber and the rigid material of the oil tank wall form a constrained damping structure, so that the constrained damping structure has good sound insulation and vibration isolation performance, and the variation of the rubber damping factor along with the temperature is shown in figure 1. Considering that a transformer and a reactor are overhauled once every 10 years, the sound insulation performance of the sound vibration suppression module is evaluated according to the service life of 10 years, and the specific evaluation steps are as follows:
a. according to GB/T1094.10 and other related methods, a sound level meter is adopted to test the near-field noise of the oil immersed power transformation equipment, the 1/3 octave sound pressure level and the A weighting sound pressure level are mastered, and the sound insulation and noise reduction index is determined. The 1/3 octave sound pressure level near-field noise spectrum of the oil-immersed power transformation equipment obtained in the step is shown in fig. 2, and the near-field sound pressure level 62.38db (a) is obtained through a weighting calculation according to the spectrum. The crude oil tank structure has certain sound insulation performance, the sound insulation performance is 38dB through testing, in order to ensure that the noise of the transformer is reduced to be below 57dB (A), the sound insulation performance of the oil tank needs to be improved by about 6dB on the original basis, and therefore the sound insulation quantity index is set to be 44dB in the test.
b. Soaking the prepared damping rubber with the gradient structure in insulating oil for 1 day, 3 days and 5 days, heating the rubber by adopting a power network iron, setting the heating temperature to be 200 ℃, 250 ℃ and 300 ℃, combining the damping rubber with an oil tank shell material, placing the combination in an impedance tube, and testing the sound insulation performance (sound insulation amount dB) by adopting GB/Z22764-2011, wherein the detection result of the sound insulation performance is shown in Table 2; and calculating the retention rate F of the sound insulation performance of the damping rubber under different test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked.
TABLE 2
| 200℃ | 250℃ | 300 | |
| Day | |||
| 0 | 47 | 47 | 47 |
| 1 day | 46.9 | 46.6 | 46.4 |
| 3 days | 46.7 | 46.2 | 45.3 |
| 5 days | 45.8 | 45.4 | 45.1 |
c. According to the sound insulation test result, a mathematical model for reducing the sound insulation performance of the damping rubber is established, and the expression of the model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant and takes the value of 8.314J/(mol.K); t is the thermodynamic temperature of the insulating oil, K; t is the soaking time, h; f is the retention rate of sound insulation performance; b is a material constant. Obtaining experimental data in table 2 according to the test, inputting the experimental data into origin software, and obtaining the mathematical model by using a data fitting method of the origin software as follows:
d. according to the oil temperature of the transformer equipment and the service life of 10 years, the sound insulation performance of the sound vibration suppression module after 10 years is calculated by adopting the formula, the F after 10 years is 97 percent, the sound insulation performance is 47 multiplied by 97 percent to be 45.59dB, and the requirement of sound insulation quantity index is met.
Example 2
The oil-immersed acoustic vibration suppression damping rubber is prepared from three structural layers, wherein the 1 st structural layer comprises the following raw materials: 80 parts of nitrile rubber, 25 parts of brominated butyl rubber, 25 parts of polypropylene, 5 parts of organic zinc, 1 part of sulfur, 1 part of 6-ethoxy-2, 2, 4-trimethyl-1, 2-dihydroquinoline, 5 parts of dioctyl phthalate, 1 part of 4,4' -dithiodimorpholine and 20 parts of calcium carbonate.
The preparation method of the oil-immersed acoustic vibration suppression damping rubber comprises the following steps:
1. adding polypropylene and an anti-aging agent into a torque rheometer, setting the temperature at 350 ℃, blending for 5 minutes at the rotating speed of 80r/min, then adding nitrile rubber, brominated butyl rubber, an activating agent and a plasticizer, continuing blending for 3 minutes, and cooling to obtain a blend.
2. And (3) placing the blend obtained in the step (1) on an upper roll of an open mill, adding a vulcanizing agent, an accelerator and a filler, carrying out open milling to obtain a premix, and then shearing the premix.
3. And (3) placing the fragments prepared in the step (2) in a torque rheometer, setting the temperature to be 350 ℃, rotating speed to be 80r/min, carrying out dynamic vulcanization, placing the blend in a flat vulcanizing machine after 10 minutes, ensuring 1/3 filled with the depth of a vulcanization mold, and waiting for natural cooling.
4. The blending ratio of the nitrile rubber and the bromobutyl rubber is properly adjusted to obtain the ratio of the 2 nd structural layer to the 3 rd structural layer, as shown in table 3. And (4) repeating the processing steps of the steps 1-3, respectively preparing vulcanized slurry of the 2 nd structural layer and the 3 rd structural layer, and filling the vulcanizing mold in a flat vulcanizing machine.
TABLE 3
5. And setting the vulcanizing temperature of the flat plate to 150 ℃, preheating for 10 minutes, applying 10MPa pressure and keeping for 5 minutes, stopping heating and keeping the pressure for 15 minutes to prepare the damping rubber with the gradient structure.
And designing a corresponding flat vulcanization forming die according to the integral thickness of 3mm of the damping rubber, and finally preparing the oil-immersed acoustic vibration damping rubber with the gradient structure.
The damping rubber and the rigid material of the oil tank wall form a constraint damping structure, and the structure has good sound insulation and vibration isolation performance. Considering that a transformer and a reactor are overhauled once every 10 years, the sound insulation performance of the sound vibration suppression module is evaluated according to the service life of 10 years, and the specific evaluation steps are as follows:
a. according to GB/T1094.10 and other related methods, a sound level meter is adopted to test the near-field noise of oil immersed power transformation equipment, a 1/3 octave sound pressure level and an A weighting sound pressure level are mastered, the sound pressure level of the transformer is 60dB (A), the sound insulation quantity of an oil tank structure is 30dB, and in order to ensure that the sound pressure level of the transformer is reduced to be below 57dB (A), the sound insulation quantity of the oil tank is required to be improved by 3dB, and a sound insulation and noise reduction quantity index is determined to be 33 dB.
b. Soaking the prepared damping rubber with the gradient structure in insulating oil for 1 day, 3 days and 5 days, heating the rubber by adopting a power network iron, setting the heating temperature to be 200 ℃, 250 ℃ and 300 ℃, combining the damping rubber with an oil tank shell material, placing the combination in an impedance tube, and testing the sound insulation performance (sound insulation amount dB) by adopting GB/Z22764-2011, wherein the detection result of the sound insulation performance is shown in Table 4; and calculating the retention rate F of the sound insulation performance of the damping rubber under different test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked.
TABLE 4
c. According to the sound insulation test result, a mathematical model for reducing the sound insulation performance of the damping rubber is established, and the expression of the model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant and takes the value of 8.314J/(mol.K); t is the thermodynamic temperature of the insulating oil, K; t is the soaking time, h; f is the retention rate of sound insulation performance, and the value is the sound insulation performance after the insulating oil is soaked divided by the sound insulation performance before the insulating oil is soaked; b is a material constant. According to test data obtained by testing, a data fitting method is adopted to obtain the mathematical model as follows:
d. according to the oil temperature of the transformer equipment and the service life of 10 years, the sound insulation performance of the sound vibration suppression module after 10 years is calculated by adopting the formula, the calculated F after 10 years is 81%, the sound insulation performance is 43 multiplied by 81%, namely 34dB, and the requirement of sound insulation quantity index is met.
Example 3
The oil-immersed acoustic vibration suppression damping rubber is prepared from a single-layer structure layer, and comprises the following raw materials: 60 parts of nitrile rubber, 20 parts of brominated butyl rubber, 20 parts of polypropylene, 4.5 parts of zinc oxide, 0.5 part of sulfur, 1 part of BLE anti-aging agent, 5 parts of paraffin oil, 1 part of 1, 3-diphenyl guanidine and 10 parts of mica powder.
The preparation method of the oil-immersed acoustic vibration suppression damping rubber comprises the following steps:
1. adding polypropylene and an anti-aging agent into a torque rheometer, setting the temperature at 150 ℃ and the rotating speed at 40r/min for blending for 5 minutes, then adding nitrile rubber, brominated butyl rubber, an activating agent and a plasticizer, continuing blending for 3 minutes, and cooling to obtain a blend.
2. And (3) placing the blend obtained in the step (1) on an upper roll of an open mill, adding a vulcanizing agent, an accelerator and a filler, carrying out open milling to obtain a premix, and then shearing the premix.
3. And (3) placing the fragments prepared in the step (2) in a torque rheometer, setting the temperature at 150 ℃ and the rotating speed at 40r/min, carrying out dynamic vulcanization, obtaining vulcanized pulp after 10 minutes, placing the vulcanized pulp in a flat vulcanizing machine, and ensuring that a vulcanization mold is fully filled. And applying 3MPa pressure and keeping for 5 minutes, stopping heating and keeping the pressure for 15 minutes to obtain the damping rubber with the single-layer structure.
In the embodiment, a corresponding flat vulcanization forming die is designed according to the thickness of the damping rubber of 3cm, and finally the oil-immersed acoustic vibration suppression damping rubber with a single-layer structure is prepared.
The damping rubber and the rigid material of the oil tank wall form a constraint damping structure, and the structure has good sound insulation and vibration isolation performance. Considering that a transformer and a reactor are overhauled once every 10 years, the sound insulation performance of the sound vibration suppression module is evaluated according to the service life of 10 years, and the specific evaluation steps are as follows:
a. according to GB/T1094.10 and other related methods, a sound level meter is adopted to test the near-field noise of the oil immersed power transformation equipment, the 1/3 octave sound pressure level and the A weighting sound pressure level are mastered, and the sound insulation and noise reduction index is determined. The near-field sound pressure level of the 1/3 octave sound pressure level of the oil-immersed power transformation equipment obtained in the step is 60.5dB (A). The crude oil tank structure has certain sound insulation performance, the sound insulation performance is 34dB after testing, and in order to ensure that the noise of the transformer is reduced to be below 57dB (A), the sound insulation performance of the oil tank needs to be improved by about 4dB on the original basis, so the sound insulation quantity index of the test is set to be 38 dB.
b. Soaking the prepared damping rubber with the gradient structure in insulating oil for 1 day, 3 days and 5 days, heating the rubber by adopting a power network iron, setting the heating temperature to be 200 ℃, 250 ℃ and 300 ℃, combining the damping rubber with an oil tank shell material, placing the combination in an impedance tube, and testing the sound insulation performance (sound insulation amount dB) by adopting GB/Z22764-2011, wherein the detection result of the sound insulation performance is shown in Table 5; and calculating the retention rate F of the sound insulation performance of the damping rubber under different test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked.
TABLE 5
| 200℃ | 250℃ | 300 | |
| Day | |||
| 0 | 42 | 42 | 42 |
| 1 day | 42 | 41.8 | 41.5 |
| 3 days | 41.7 | 41.5 | 41.3 |
| 5 days | 41.5 | 41.2 | 40.9 |
c. According to the sound insulation test result, a mathematical model for reducing the sound insulation performance of the damping rubber is established, and the expression of the model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant and takes the value of 8.314J/(mol.K); t is the thermodynamic temperature of the insulating oil, K; t is the soaking time, h; f is the retention rate of sound insulation performance; b is a material constant. Test data in table 2 are obtained according to the test, and a data fitting method is adopted to obtain the mathematical model as follows:
lnF＝32.5/T-0.00793lnt-0.0443
d. according to the oil temperature of the transformer equipment and the service life of 10 years, the sound insulation performance of the sound vibration suppression module after 10 years is calculated by adopting the formula, the F after 10 years is 96%, the sound insulation performance is 42 multiplied by 96%, namely 40.32dB, and the requirement of sound insulation quantity index is met.
Example 4
The oil-immersed acoustic vibration suppression damping rubber is prepared from a single-layer structure layer, and comprises the following raw materials: 75 parts of nitrile rubber, 25 parts of brominated butyl rubber, 4.5 parts of zinc oxide, 0.5 part of sulfur, 1 part of BLE anti-aging agent, 5 parts of paraffin oil, 1 part of 1, 3-biphenylguanidine and 10 parts of mica powder.
The preparation method of the oil-immersed acoustic vibration suppression damping rubber comprises the following steps:
1. adding the anti-aging agent into a torque rheometer, setting the temperature at 150 ℃, blending for 5 minutes at the rotating speed of 40r/min, then adding the nitrile rubber, the brominated butyl rubber, the activating agent and the plasticizer, continuing blending for 3 minutes, and cooling to obtain a blend.
2. And (3) placing the blend obtained in the step (1) on an upper roll of an open mill, adding a vulcanizing agent, an accelerator and a filler, carrying out open milling to obtain a premix, and then shearing the premix.
3. And (3) placing the fragments prepared in the step (2) in a torque rheometer, setting the temperature at 150 ℃ and the rotating speed at 40r/min, carrying out dynamic vulcanization, obtaining vulcanized pulp after 10 minutes, placing the vulcanized pulp in a flat vulcanizing machine, and ensuring that a vulcanization mold is fully filled. And applying 3MPa pressure and keeping for 5 minutes, stopping heating and keeping the pressure for 15 minutes to obtain the damping rubber with the single-layer structure.
In the embodiment, a corresponding flat vulcanization forming die is designed according to the thickness of the damping rubber of 3cm, and finally the oil-immersed acoustic vibration suppression damping rubber is prepared.
The damping rubber and the rigid material of the oil tank wall form a constraint damping structure, and the structure has good sound insulation and vibration isolation performance. Considering that a transformer and a reactor are overhauled once every 10 years, the sound insulation performance of the sound vibration suppression module is evaluated according to the service life of 10 years, and the specific evaluation steps are as follows:
a. according to GB/T1094.10 and other related methods, a sound level meter is adopted to test the near-field noise of the oil immersed power transformation equipment, the 1/3 octave sound pressure level and the A weighting sound pressure level are mastered, and the sound insulation and noise reduction index is determined. The near-field sound pressure level of the 1/3 octave sound pressure level of the oil-immersed power transformation equipment obtained in the step is 60.5dB (A). The crude oil tank structure has certain sound insulation performance, the sound insulation performance is 34dB after testing, and in order to ensure that the noise of the transformer is reduced to be below 57dB (A), the sound insulation performance of the oil tank needs to be improved by about 4dB on the original basis, so the sound insulation quantity index of the test is set to be 38 dB.
b. Soaking the prepared damping rubber with the gradient structure in insulating oil for 1 day, 3 days and 5 days, heating the rubber by adopting a power network iron, setting the heating temperature to be 200 ℃, 250 ℃ and 300 ℃, combining the damping rubber with an oil tank shell material, placing the combination in an impedance tube, and testing the sound insulation performance (sound insulation amount dB) by adopting GB/Z22764-2011, wherein the detection result of the sound insulation performance is shown in Table 6; and calculating the retention rate F of the sound insulation performance of the damping rubber under different test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked.
TABLE 6
c. According to the sound insulation test result, a mathematical model for reducing the sound insulation performance of the damping rubber is established, and the expression of the model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant and takes the value of 8.314J/(mol.K); t is the thermodynamic temperature of the insulating oil, K; t is the soaking time, h; f is the retention rate of sound insulation performance; b is a material constant. Test data in table 2 are obtained according to the test, and a data fitting method is adopted to obtain the mathematical model as follows:
lnF＝34.93745/T-0.03627lnt+0.02982
d. according to the oil temperature of the transformer equipment and the service life of 10 years, the sound insulation performance of the sound vibration suppression module after 10 years is calculated by adopting the formula, the calculated F after 10 years is 75%, the sound insulation performance is 40 multiplied by 75%, namely 30dB, and the sound insulation performance does not reach the sound insulation index 38dB, so that the formula of the embodiment can not meet the requirement of the sound insulation index.
In order to enable the formula to meet the requirement of the sound insulation index, the composition and the proportion of the oil-immersed sound vibration suppression damping rubber can be further adjusted by adopting the aging resistance adjusting method, for example, the types of raw materials are changed, for example, polypropylene is added as the raw material, the proportion among the polypropylene, the nitrile rubber and the brominated butyl rubber is optimized to prepare a new oil-immersed sound vibration suppression damping rubber, and the sound insulation performance of the sound vibration suppression module is evaluated by adopting the evaluation method again until the formula meets the requirement of the sound insulation index.
The oil-immersed acoustic vibration suppression damping rubber which is obtained by adopting the aging resistance adjusting method and can meet the requirement of the sound insulation index comprises the following raw materials:
60-80 parts of nitrile rubber, 20-40 parts of brominated butyl rubber, 20-50 parts of polypropylene, 4.5-5.5 parts of activating agent, 0.5-1.5 parts of vulcanizing agent, 1-3 parts of anti-aging agent, 5-20 parts of plasticizer, 1-5 parts of accelerator and 10-30 parts of filler.
Test examples
The scheme in the embodiment 3 is adopted to finish the preparation of the single-layer damping rubber, and the aging mathematical model is as follows:
lnF＝32.5/T-0.00793lnt-0.0443
according to the oil temperature of the transformer equipment and the service life of 10 years, the sound insulation performance of the sound vibration suppression module after 10 years is calculated by adopting the formula, and F after 10 years is 96%, and the sound insulation performance is 42 multiplied by 96%, namely 40.32 dB.
The measured temperature was taken into the aging model at 300 ℃ for 10 days of oil immersion, and the calculated performance retention rate F was 96%, which was the same as the performance retention rate at the temperature of the transformer equipment and after 10 years of immersion. Therefore, for the damping rubber, the sound insulation performance of the rubber subjected to oil immersion aging is tested according to the test conditions of the heating temperature of 300 ℃ and the oil immersion time of 10 days, the sound insulation quantity is 39.8dB and is 1.3% different from the calculated value of an aging model, and the aging model is proved to have higher prediction precision.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. The method for evaluating the sound insulation performance of the oil-immersed sound vibration suppression damping rubber is characterized by comprising the following steps of:
acquiring data: soaking damping rubber in insulating oil, setting a plurality of groups of oil temperatures and a plurality of groups of insulating oil aging test conditions of soaking time, then placing the damping rubber after the aging test and an oil tank shell material in a resistance tube in a combined manner, and testing the sound insulation performance of the damping rubber before and after the aging test; calculating the retention rate F of the sound insulation performance of the damping rubber under different insulating oil aging test conditions, wherein F is the sound insulation performance after the insulating oil is soaked/the sound insulation performance before the insulating oil is soaked;
establishing a mathematical model: establishing a sound insulation performance reduction mathematical model of damping rubber, wherein the expression of the mathematical model is as follows:
in the expression, A is a reaction rate constant, h-1(ii) a E is activation energy, J/mol; r is a molar gas constant, and R is 8.314J/(mol K); t is the thermodynamic temperature, K; t is the soaking time, h; f is the retention rate of sound insulation performance; b is a material constant;
substituting the data into a mathematical model for calculation, and effectively calculating a relational expression of thermodynamic temperature T, soaking time T and sound insulation performance retention rate F according to the relational expression of the mathematical model;
obtaining the sound insulation performance of the corresponding damping rubber when the damping rubber is used in insulating oil at a specific operating temperature for a specific time: and substituting the operating temperature and the operating time of the insulating oil into a relational expression of the retention rate F of the sound insulation performance to obtain the retention rate F of the sound insulation performance, and multiplying the initial sound insulation performance by the retention rate F of the sound insulation performance to evaluate the sound insulation performance of the damping rubber used for a specific time in the insulating oil at a specific operating temperature.
2. The evaluation method according to claim 1, wherein the test conditions comprise at least three sets of thermodynamic temperatures for sound insulation performance at different soaking times.
3. Evaluation method according to claim 1 or 2, characterized in that after the data are inserted into the mathematical model, origin software is used for the calculation.
4. The evaluation method according to any one of claims 1 to 3, wherein the damping rubber has an overall thickness of 3 to 30 mm.
5. The oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method according to any one of claims 1-4 is applied to adjusting the aging resistance of the damping rubber.
6. The use according to claim 5, wherein the process of adjusting the aging resistance of the damping rubber is as follows:
testing to obtain near-field noise of the oil-immersed power transformation equipment, mastering 1/3 octave sound pressure level and A weighting sound pressure level of the near-field noise, and determining sound insulation and noise reduction quantity indexes;
obtaining the sound insulation performance of the damping rubber according to the evaluation method, and judging whether the calculated sound insulation performance meets the sound insulation index;
and if the sound insulation index is not met, adjusting the composition and the proportion of the damping rubber until the calculated sound insulation performance meets the sound insulation index.
7. The application of the sound insulation material as claimed in claim 5 or 6, wherein the sound insulation performance retention rate F of 10 years of soaking time is calculated by adopting a relational expression according to the service life of 10 years, the sound insulation performance after 10 years is calculated by multiplying the initial sound insulation performance by the sound insulation performance retention rate F, and whether the calculated sound insulation performance meets the sound insulation index is judged.
8. The oil-immersed acoustic vibration suppression damping rubber obtained by the application of claim 7 is characterized by comprising at least one structural layer, wherein the structural layer comprises the following components in parts by weight: 60-80 parts of nitrile rubber, 20-40 parts of brominated butyl rubber, 20-50 parts of polypropylene, 4.5-5.5 parts of activating agent, 0.5-1.5 parts of vulcanizing agent, 1-3 parts of anti-aging agent, 5-20 parts of plasticizer, 1-5 parts of accelerator and 10-30 parts of filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110984151.5A CN113654978A (en) | 2021-08-25 | 2021-08-25 | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110984151.5A CN113654978A (en) | 2021-08-25 | 2021-08-25 | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113654978A true CN113654978A (en) | 2021-11-16 |
Family
ID=78482005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110984151.5A Pending CN113654978A (en) | 2021-08-25 | 2021-08-25 | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113654978A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006282991A (en) * | 2004-10-28 | 2006-10-19 | Sumitomo Chemical Co Ltd | Resin composition, foamed molded article and multilayer molded article |
| CN104076136A (en) * | 2014-06-30 | 2014-10-01 | 哈尔滨工业大学 | Method for analyzing aging mechanism of silicone rubber by utilizing variable activation energy |
| CN105086018A (en) * | 2015-08-06 | 2015-11-25 | 国网智能电网研究院 | Shock absorbing rubber material used for transformer |
| 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 |
| CN107609332A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method of converter power transformer far-field noise prediction |
| CN109553823A (en) * | 2018-11-28 | 2019-04-02 | 天津市橡胶工业研究所有限公司 | Marine piping cladding rubber damping material and preparation method |
| CN110218372A (en) * | 2019-06-25 | 2019-09-10 | 全球能源互联网研究院有限公司 | A kind of rubber composite material and preparation method thereof |
| CN110676035A (en) * | 2019-10-24 | 2020-01-10 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Transformer oil tank inner wall constrained damping composite sound insulation structure and design method |
| CN110765692A (en) * | 2019-11-15 | 2020-02-07 | 一汽解放汽车有限公司 | Method for predicting static seal life of rubber O-shaped ring |
| CN111140546A (en) * | 2019-12-26 | 2020-05-12 | 国网北京市电力公司 | Noise reduction equipment of transformer fan |
| CN111339628A (en) * | 2019-10-24 | 2020-06-26 | 北京交通大学 | Fluid-solid coupling-based high-speed railway wheel rail area vibration and noise analysis method |
| CN111474109A (en) * | 2020-04-01 | 2020-07-31 | 中国石油天然气集团有限公司 | Test method for predicting service life of thermoplastic plastic in oil-gas environment |
| CN111767638A (en) * | 2020-05-22 | 2020-10-13 | 云南电网有限责任公司 | Outdoor transformer substation sound insulation cover modular design method |
| CN112489966A (en) * | 2020-12-08 | 2021-03-12 | 国网河南省电力公司电力科学研究院 | Dry-type air-core reactor sound insulation cover and design method thereof |
| CN112784413A (en) * | 2021-01-22 | 2021-05-11 | 北京航空航天大学 | ZN-40 damping vibration attenuation structure residual storage life evaluation method |
| CN113008361A (en) * | 2021-02-04 | 2021-06-22 | 国网湖南省电力有限公司 | Substation boundary noise anti-environmental interference detection method and device |
-
2021
- 2021-08-25 CN CN202110984151.5A patent/CN113654978A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006282991A (en) * | 2004-10-28 | 2006-10-19 | Sumitomo Chemical Co Ltd | Resin composition, foamed molded article and multilayer molded article |
| CN104076136A (en) * | 2014-06-30 | 2014-10-01 | 哈尔滨工业大学 | Method for analyzing aging mechanism of silicone rubber by utilizing variable activation energy |
| CN105086018A (en) * | 2015-08-06 | 2015-11-25 | 国网智能电网研究院 | Shock absorbing rubber material used for transformer |
| 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 |
| CN107609332A (en) * | 2017-09-18 | 2018-01-19 | 安徽理工大学 | A kind of method of converter power transformer far-field noise prediction |
| CN109553823A (en) * | 2018-11-28 | 2019-04-02 | 天津市橡胶工业研究所有限公司 | Marine piping cladding rubber damping material and preparation method |
| CN110218372A (en) * | 2019-06-25 | 2019-09-10 | 全球能源互联网研究院有限公司 | A kind of rubber composite material and preparation method thereof |
| CN111339628A (en) * | 2019-10-24 | 2020-06-26 | 北京交通大学 | Fluid-solid coupling-based high-speed railway wheel rail area vibration and noise analysis method |
| CN110676035A (en) * | 2019-10-24 | 2020-01-10 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Transformer oil tank inner wall constrained damping composite sound insulation structure and design method |
| CN110765692A (en) * | 2019-11-15 | 2020-02-07 | 一汽解放汽车有限公司 | Method for predicting static seal life of rubber O-shaped ring |
| CN111140546A (en) * | 2019-12-26 | 2020-05-12 | 国网北京市电力公司 | Noise reduction equipment of transformer fan |
| CN111474109A (en) * | 2020-04-01 | 2020-07-31 | 中国石油天然气集团有限公司 | Test method for predicting service life of thermoplastic plastic in oil-gas environment |
| CN111767638A (en) * | 2020-05-22 | 2020-10-13 | 云南电网有限责任公司 | Outdoor transformer substation sound insulation cover modular design method |
| CN112489966A (en) * | 2020-12-08 | 2021-03-12 | 国网河南省电力公司电力科学研究院 | Dry-type air-core reactor sound insulation cover and design method thereof |
| CN112784413A (en) * | 2021-01-22 | 2021-05-11 | 北京航空航天大学 | ZN-40 damping vibration attenuation structure residual storage life evaluation method |
| CN113008361A (en) * | 2021-02-04 | 2021-06-22 | 国网湖南省电力有限公司 | Substation boundary noise anti-environmental interference detection method and device |
Non-Patent Citations (6)
| Title |
|---|
| 付宝强;熊英;: "HNBR加速老化时的性能变化及寿命预测", 特种橡胶制品, no. 06, 15 December 2017 (2017-12-15), pages 64 - 67 * |
| 张学飞;孔令行;王瑞乾;李晔;徐磊;: "喷涂阻尼浆对地铁车辆地板铝型材隔声性能影响研究", 常州大学学报(自然科学版), no. 03, pages 50 - 51 * |
| 张玉乾: "轴承密封橡胶材料使用寿命的试验研究", 中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑, no. 09, 15 September 2013 (2013-09-15), pages 11 - 16 * |
| 杨俊凤;周相荣;丁炜;: "减振橡胶的耐油性能分析", 噪声与振动控制, no. 04, 18 August 2013 (2013-08-18) * |
| 石菲;童宗鹏;龚丽琴;柳贡民;朱卫华;: "橡胶隔振器老化寿命的预测", 船舶工程, no. 04 * |
| 陶桂东;吕文俊;曾宪奎;郝建国;苗清;: "基于WLF方程的橡胶减振器老化寿命预测", 橡塑技术与装备, no. 03, 1 February 2017 (2017-02-01) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103712901B (en) | A kind of encapsulant for impermeability test and application thereof | |
| CN106633915A (en) | Highly flame-retardant halogen-free environment-friendly silicone rubber and preparation method thereof | |
| Chen et al. | Thermal‐oxidative aging performance and life prediction of polyethylene pipe under cyclic and constant internal pressure | |
| CN102408654A (en) | Cable sheath material for offshore platform and preparation method thereof | |
| CN105330990A (en) | Insulating material for new energy vehicle charging pile cable and preparation method of insulating material | |
| CN107122563A (en) | A kind of GIS hermetic seals rubber life prediction computational methods and device | |
| CN108359152A (en) | A kind of cooling system high temperature resistant hydrogenated nitrile-butadiene rubber material and preparation method thereof | |
| CN106279958A (en) | For manufacturing rubber composition and the production method thereof of glue-line inside and outside vehicle turbine pressurized hoses | |
| CN111474109B (en) | Test method for predicting service life of thermoplastic plastic in oil-gas environment | |
| Milani et al. | Kinetic finite element model to optimize sulfur vulcanization: Application to extruded epdm weather‐strips | |
| CN113654978A (en) | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof | |
| CN113563650A (en) | Oil-immersed acoustic vibration suppression damping rubber and preparation method thereof | |
| CN107057138A (en) | Automobile door sealing rubber | |
| CN111057320A (en) | High weather-resistant rubber alloy for sealing underwater cable and preparation process thereof | |
| CN108659545B (en) | Silicone rubber composite material and preparation method thereof | |
| CN107512052A (en) | A kind of compound sound insulationg board of rubber base high-damping | |
| CN103032499B (en) | Automotive brake friction plate made of hexagonal-crystal-system boron nitride and preparation method thereof | |
| CN109721858B (en) | Medium-temperature repairing rubber material, preparation method thereof and application thereof in propellant | |
| CN102030931A (en) | Chloroprene rubber pipe sizing material doped with co-chlorinated polyether reclaimed rubber | |
| CN106751014A (en) | A kind of electro-insulating rubber formula | |
| Kunheng et al. | Rubber aging life prediction based on interpolation and improved time-temperature superposition principle | |
| CN107759851A (en) | High-temperature stability, high sound transmitting rubber material and preparation method | |
| CN108586890A (en) | A kind of flame-proof anti-aging new-energy automobile cable material and preparation method thereof | |
| CN111303499B (en) | Oil-resistant and high-temperature-resistant damping rubber and preparation method and application thereof | |
| CN107337843A (en) | Durable irradiated crosslinking low-smoke and halogen-free cable material of polyolefin of high temperature and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |