CN117701242A - Sealing material for working face of underwater ultrasonic transducer, preparation and sealing method - Google Patents
Sealing material for working face of underwater ultrasonic transducer, preparation and sealing method Download PDFInfo
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- CN117701242A CN117701242A CN202410166306.8A CN202410166306A CN117701242A CN 117701242 A CN117701242 A CN 117701242A CN 202410166306 A CN202410166306 A CN 202410166306A CN 117701242 A CN117701242 A CN 117701242A
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- silicone rubber
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000003566 sealing material Substances 0.000 title claims abstract description 17
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 103
- 239000004945 silicone rubber Substances 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 71
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 69
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 54
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 claims abstract description 43
- PQCHENNROHVIHO-UHFFFAOYSA-M silver;2-methylprop-2-enoate Chemical compound [Ag+].CC(=C)C([O-])=O PQCHENNROHVIHO-UHFFFAOYSA-M 0.000 claims abstract description 32
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 150000002978 peroxides Chemical class 0.000 claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 239000013530 defoamer Substances 0.000 claims abstract description 17
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 238000007872 degassing Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 74
- 239000005060 rubber Substances 0.000 claims description 74
- 150000001875 compounds Chemical class 0.000 claims description 55
- 238000004073 vulcanization Methods 0.000 claims description 31
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 13
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 13
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000004636 vulcanized rubber Substances 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 13
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 12
- 230000001965 increasing effect Effects 0.000 description 10
- 238000002156 mixing Methods 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004342 Benzoyl peroxide Substances 0.000 description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 5
- 239000012752 auxiliary agent Substances 0.000 description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000007259 addition reaction Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 229920003225 polyurethane elastomer Polymers 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- SJNNZXIPFSRUJB-UHFFFAOYSA-N 4-[2-[2-[2-(4-formylphenoxy)ethoxy]ethoxy]ethoxy]benzaldehyde Chemical compound C1=CC(C=O)=CC=C1OCCOCCOCCOC1=CC=C(C=O)C=C1 SJNNZXIPFSRUJB-UHFFFAOYSA-N 0.000 description 1
- FNDLPWWLTIWOAL-UHFFFAOYSA-M C(C=C)(=O)[O-].C[Zn+] Chemical compound C(C=C)(=O)[O-].C[Zn+] FNDLPWWLTIWOAL-UHFFFAOYSA-M 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CHIHQLCVLOXUJW-UHFFFAOYSA-N benzoic anhydride Chemical compound C=1C=CC=CC=1C(=O)OC(=O)C1=CC=CC=C1 CHIHQLCVLOXUJW-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
- B06B1/0637—Spherical array
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/74—Underwater
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention belongs to the technical field of vulcanized rubber preparation, and relates to a sealing material for an underwater ultrasonic transducer working face, a preparation method and a sealing method. The sealing method comprises the following steps: fixing the vibration element on the spherical bracket and performing line protection; coating and degassing the vibration element surface of the spherical bracket after line protection, and then sealing glue solution; the sealing glue solution is prepared from 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent; pouring the deaerated sealing glue solution into a transducer, shaking uniformly, standing and deaerating; and (5) demolding the die. The tensile strength, elongation at break, hardness and tensile shear strength of the material are all improved, and the adhesiveness with metals, ceramics, plastics and the like and the high-frequency vibration resistance of underwater use are enhanced; the sealing method reduces the processing steps and reduces the difficulty of industrial implementation.
Description
Technical Field
The invention belongs to the technical field of vulcanized rubber preparation, and relates to a sealing material for an underwater ultrasonic transducer working face, a preparation method and a sealing method.
Background
The adhesion of the existing silicone rubber surface material with different materials of metal, ceramic and plastic generally adopts a surface treating agent, so that the process steps are increased, and the cost is increased; and increases the risk of gumming, peeling, etc. due to improper surface treatment. Silicone rubber, which has good stress, strength and vibration resistance, is particularly important for protecting the output surface unit of high frequency ultrasound therapy equipment. The sound-transmitting material is generally used as a sound window of a ship sonar guide cover, a hydrophone and other underwater sound transducers. The sound-transmitting material mainly comprises chloroprene rubber, natural rubber and polyurethane rubber. The ideal sound-transmitting material is that sound waves can pass through without reflection and loss when being incident on the sound-transmitting layer, so the characteristic impedance of the material is required to be matched with the incident medium, and the attenuation constant of the material is required to be as small as possible. The properties of the material include the following two points: firstly, the underwater acoustic device of the transducer is covered to prevent the invasion of external water from affecting the service performance; and secondly, the sound waves pass through the filter as far as possible without loss, namely, the filter has good sound permeability.
Main use scene of current sound-transmitting material includes: 1. the ship/submarine sonar guide sleeve mainly comprises a steel skeleton made of rubber materials, fiber layers, steel and other composite materials; wherein, the fiber layer mainly plays a role of increasing strength; the rubber material mainly plays roles of sound transmission and sealing, and the mainly used rubber materials are chloroprene rubber, natural rubber, chlorinated butyl rubber and the like; 2. a medical ultrasonic generator (therapeutic equipment/detection equipment, such as B ultrasonic) sealing layer, wherein the main structure of the medical ultrasonic generator is formed by matching a plurality of materials contained in parts such as a piezoelectric layer (ceramic vibrating plate), a backing layer, a sealing layer and the like, and the sealing layer is mainly made of materials such as epoxy resin, polyurethane rubber and the like; 3. the hydrophone surface sealing layer mainly uses materials such as natural rubber, epoxy resin, polyurethane rubber and the like.
The prior medical sound-transmitting silicon rubber is mainly applied to the transducer of ultrasonic diagnostic equipment and mainly takes RTV silicon rubber, the prior transducer radiates less sound power, and the general sound intensity is not more than 10mW/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the Sound intensity exceeding 5W/cm 2 Is high-power ultrasonic treatment equipment. And the ultrasonic treatment equipment power is improved, when the ultrasonic treatment equipment is used, the acoustic power radiated by the transducer needs to be improved, and the emission voltage and the acoustic power of the circuit need to be increased. The method not only brings difficulty to the design of the whole machine, but also has the problems of ageing of the rubber surface, weakening of the performance and the like caused by high power.
The material prepared by the method is used for the surface of an output unit of high-frequency ultrasonic treatment equipment, and aims to solve the problem of preparing the material without using surface auxiliary agents under the underwater use condition of 20-40 ℃. The peeling problem caused by vibration, particularly temperature and humidity change of the working environment is not easy to occur. The material also has good adhesion performance with metal, plastic and ceramic, prevents water seepage, and simultaneously requires good transmission capability of the material to high-frequency vibration and good ageing resistance to high-frequency vibration, so that the treatment equipment has stability in the use process accompanied with high-frequency vibration and requires the capability of ensuring the use for not less than 10000 hours.
The silicone rubber materials used by the prior medical ultrasonic generator have the following problems: 1) Epoxy resin: the adhesive force to some materials with low polarity is small, and the finished product has the problems of brittleness, poor peeling resistance, cracking and the like; 2) Polyurethane rubber: the long-term use under high-frequency vibration/high-temperature conditions can have larger performance attenuation, so that waste recovery is not friendly to the environment.
The invention aims to provide a sealing material for an underwater ultrasonic transducer working face, a preparation method and a sealing method thereof, and the prepared sound-transmitting material can greatly improve the sound-transmitting rate on one hand and can be effectively bonded with materials such as metal, plastic and the like.
Disclosure of Invention
The invention aims at the current state of the art that the surface materials of the output unit of the existing ultrasonic treatment equipment all use surface auxiliary agents and the vibration resistance performance needs to be improved, and provides a sealing material for the working face of an underwater ultrasonic transducer, a preparation method and a sealing method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
as a first aspect of the invention, a sealing material for an underwater ultrasonic transducer working face is provided, which comprises the following components in parts by weight: 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent;
the methyl silicone rubber comprises high molecular weight series block methyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight of the methyl silicone rubber is 3-6 ten thousand; the methyl vinyl silicone rubber comprises high molecular weight series block methyl vinyl silicone rubber or ultrahigh molecular weight methyl vinyl silicone rubber, wherein the molecular weight of the methyl vinyl silicone rubber is 3-6 ten thousand;
the silver methacrylate/zinc methacrylate increases the similarity of ion polarity formed by silver plating on the surface of the vibration plate and increases the bonding performance with metal;
the zinc methacrylate/silver methacrylate is used as organic olefine acid salt, so that the adhesion performance of the preparation material with plastic ABS is improved by the winding and addition reaction of the preparation material with a styrene butadiene acrylonitrile molecular chain;
the material of the invention enables the organic macromolecular chains to be adsorbed on the surface of the inorganic matters through the surface adsorption effect to form better mechanical properties, and finally achieves the effect of enhancing the adhesion with three different materials of metal, ceramic and plastic.
As a second aspect of the present invention, a method for preparing a sealing material for a working surface of an underwater ultrasonic transducer is provided, including the steps of:
step1, banburying methyl silicone rubber, a curing agent, a defoaming agent, zinc methacrylate/silver methacrylate, methyl vinyl silicone rubber and a peroxide vulcanizing agent to obtain a prepared rubber compound;
90-100 parts of methyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoaming agent, 0.2-1 part of zinc methacrylate/silver methacrylate, 0-10 parts of methyl vinyl silicone rubber and 0.1-0.5 part of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the range of the proportion is 2:1 to 1:3, a step of; the peroxide vulcanizing agent is benzoyl peroxide.
Step2, removing gas in the prepared rubber compound to obtain the rubber compound with the gas removed;
step3, introducing the gas-removed rubber compound into a die and equipment accessories to carry out first-stage room temperature vulcanization to obtain a device after the first-stage room temperature vulcanization;
step4, placing the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 70-100 ℃ to obtain a sealing material of the working face of the underwater ultrasonic transducer;
the Step2 is to exclude the gas inside the prepared rubber compound, and specifically comprises the following steps: and placing the prepared rubber compound into a vacuum box, and starting a vacuum pump to discharge free gas and dissolved gas in the rubber compound through an automatic exhaust valve.
As a third aspect of the present invention, an ultrasonic transducer supported by a sealing method for a working surface of an underwater ultrasonic transducer is provided, including a plurality of vibrating plates; each vibrating plate is provided with a vibrating plate base, the number of vibrating elements ranges from 20 to 500, the vibrating plates are connected with the vibrating plate base, and are connected onto a spherical bracket together through a sealing material of the working face of the underwater ultrasonic transducer;
a plurality of through mounting holes are uniformly formed in the spherical inner wall of the spherical bracket, and a vibrating element is correspondingly arranged in each mounting hole. As an example, the mounting holes are provided with five to seven turns in total from the bottom to the top of the spherical bracket. Uniformly dividing a spherical bracket provided with vibration elements into K sectors, wherein the vibration elements with the same number are distributed in each sector; the K is more than or equal to 2 and less than or equal to 20;
for vibration elements in each sector, the vibration elements can be divided into a plurality of groups to form a plurality of vibration slice units; the number of vibration elements included in the vibration element unit is more than or equal to 2 and less than or equal to 20.
The sealing method comprises the following steps:
s1, forming vibration elements by vibration plates, fixing the vibration elements on a spherical bracket, and then performing line protection to obtain the spherical bracket after line protection;
s2, smearing sealing glue solution on the surface of the vibrating element on the spherical bracket after the protection of the S1 circuit;
the sealing glue solution is prepared from the following components in parts by weight: 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent;
the curing agent is dibutyl tin dilaurate in specific implementation; the peroxide vulcanizing agent is benzoyl peroxide in specific implementation;
the methyl silicone rubber comprises high molecular weight series block methyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight of the methyl silicone rubber is 3-6 ten thousand;
the methyl vinyl silicone rubber comprises high molecular weight series block methyl vinyl silicone rubber or ultrahigh molecular weight methyl vinyl silicone rubber, wherein the molecular weight of the methyl vinyl silicone rubber is 3-6 ten thousand;
the silver methacrylate/zinc methacrylate increases the similarity of ion polarity formed by silver plating on the surface of the vibration plate and increases the bonding performance with metal;
the zinc methacrylate/silver methacrylate is used as organic olefine acid salt, so that the adhesion performance of the preparation material with plastic ABS is improved through winding and addition reaction of the preparation material with styrene butadiene acrylonitrile molecular chains.
The preparation process of the glue sealing liquid comprises the following steps:
s21, banburying methyl silicone rubber, a curing agent, a defoaming agent, zinc methacrylate/silver methacrylate, methyl vinyl silicone rubber and a peroxide vulcanizing agent to obtain a prepared rubber compound;
s22, removing gas in the prepared rubber compound to obtain the rubber compound with the gas removed, wherein the rubber compound is specifically as follows: degassing the prepared rubber compound by using a vacuum pump until the vacuum degree value is stable and does not decrease;
the rubber compound is a sealing glue solution;
s3, pouring the sealing glue solution with the gas removed into a transducer, shaking uniformly, standing and degassing;
s4, pressing the die;
s5, demolding: and (5) when the sealing glue solution is solidified, unscrewing the nut, taking down the die, and cleaning the glue surface.
As a comparative example, the sealing step of the sealing method of the present invention is not adopted, and the following steps are required to be performed before S2:
step1, smearing alpha-ethyl cyanoacrylate on a vibration plate, and then bonding and fixing the vibration plate with a metal base;
step2, bonding ABS and the base by using organic silicone;
and the step1 and the step2 need to be operated before the step S2 of the invention;
namely: s2, replacing the step with: coating alpha-ethyl cyanoacrylate on the surface of the vibrating element on the spherical bracket after the S1 line protection, then bonding and fixing the vibrating element with a metal base, and bonding ABS and a vibrating piece base by using organic silicone; the silica gel liquid prepared by the invention can omit the step.
The S1 specifically comprises the following steps:
s11, welding a lead to the back of the vibration plate;
s12, mounting a vibration plate with a wire welded on the back surface on the spherical bracket to form a vibration element;
s13, enabling the vibrating element welded with the lead to pass through a vibrating piece mounting hole on the spherical bracket;
s14, fixing the vibration element penetrating through the vibration piece mounting hole on the spherical bracket;
and S15, wrapping the lead on the back of the spherical bracket, and finishing line protection.
Each pair of wires on the back of the spherical bracket corresponds to each vibrating element, the corresponding wires are welded on the corresponding vibrating plates, and the welded wires penetrate through the spherical bracket, are bound up through a binding belt and are closely fixed on the hole site after being bound up through a heat shrinkage tube;
the bundles are gathered, and 2 to 6 pairs of wires are correspondingly arranged; and each pair of wires corresponds to one vibrating element and is treated by a heat shrinkage tube.
S4 specifically comprises the following steps:
s41, respectively screwing the upper surfaces of nuts on the upper screw rods of the lower die to positions T millimeters away from the tops of the screw rods;
t is more than or equal to 5 and less than or equal to 15;
s42, lifting the upper die, moving the upper die to a position above the position of the lower die, aligning the relative positions of the upper die and the lower die, enabling a guide post of the lower die to penetrate into a guide hole of the upper die, and slowly dropping the upper die to the position of the nut;
s43, sequentially rotating nuts at the top of the screw rod to enable the upper die to uniformly descend until the edge of the upper die is completely attached to the upper end face of the transducer and stands still;
s44, respectively screwing nuts above the screw rods, and screwing the nuts until the nuts cannot be screwed.
Advantageous effects
Compared with the prior art, the sealing material, the preparation and the sealing method for the working face of the underwater ultrasonic transducer have the following beneficial effects:
1. the material uses the methyl silicone rubber high molecular weight linear saturated rubber polymer, the silicone rubber has good ageing resistance, water resistance and medical safety, and the preparation process reduces the technical process and improves the production efficiency by modifying in the processing process;
2. the material prepared by the preparation method enables organic macromolecular chains to be adsorbed on the surface of inorganic matters through the surface adsorption effect to form good mechanical properties; the surface protection material for the high-frequency vibration element used under water can ensure stable operation in a service period;
3. the material finally realizes reinforcement, metal and ceramicThe adhesive property of the porcelain and plastic materials is high, the sound transmission rate is high, the sound attenuation coefficient is smaller than 0.5dB/mm, and the maximum sound intensity of the provided adhesive surface material can be up to 2.5W/cm 2 2000 times of the maximum sound intensity which can be born by materials used on common ultrasonic diagnostic equipment;
4. in the preparation, a small amount of double bonds are added into a body through mixing methyl silicone rubber and methyl vinyl silicone rubber, metal ions are introduced through adding peroxide vulcanizing agent and zinc methacrylate/silver methacrylate, and the adhesive force between the rubber body and the metal of a device is increased through the polarity effect of the metal and the metal;
5. the adhesive force between rubber and devices is increased in the preparation process in a mode of not using surface auxiliary agents, so that processing steps are reduced, and the difficulty in industrial realization is reduced;
6. the ultrasonic treatment equipment finished by the material prepared by the preparation method has the advantages of improving the tensile strength, the elongation at break, the hardness, the tensile shear strength and the peeling strength of rubber.
Drawings
FIG. 1 is a flow chart of the preparation of an encapsulant material for the working face of an underwater ultrasonic transducer;
fig. 2 is a flow of sealing the working face of an underwater ultrasonic transducer of the present invention.
Detailed Description
The invention will be further illustrated with reference to the drawings and specific embodiments, it being understood that these examples are provided only for illustrating the invention and are not limiting the scope of application of the invention. After reading the present invention, those skilled in the art will modify the present invention in various equivalent forms, which fall within the scope defined by the appended claims of the present application.
The invention relates to a sealing material for an underwater ultrasonic transducer working face, a preparation method and a sealing method. The encapsulation method, as shown in fig. 2, includes: fixing the vibration element on the spherical bracket and performing line protection; coating and degassing the vibration element surface on the spherical bracket after line protection, and then sealing glue solution; the sealing glue solution is prepared from 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent, and the preparation process is shown in figure 1;
in specific implementation, the curing agent adopts a mixture ratio of 1:2 dibutyl tin dilaurate/methyltriethoxysilane; the curing agent not only plays a role in curing but also plays a role in catalysis; the typical proportion is 1:2, for adjusting the reaction speed and the crosslinking degree. In practice, 0.5 (corresponding to 1:2) to 3: 1.
The sealing material has the following specific advantages: the specific acoustic characteristics of the silicone rubber and the acoustic impedance of the vulcanized rubber material are close to that of the environmental water used by the material by adding the ingredients with different components, so that the sound transmission rate of the material is improved, and the sound attenuation coefficient is less than 0.5dB/mm.
Pouring the deaerated sealing glue solution into a transducer, shaking uniformly, standing and deaerating; and (5) demolding the die. The preparation process realizes that the adhesive force between rubber and devices is increased without using a surface auxiliary agent, reduces processing steps, reduces industrial realization difficulty, improves the tensile strength, elongation at break, hardness and tensile shear strength of materials, and enhances the adhesive property between the materials and metals, ceramics, plastics and the like and the high-frequency vibration resistance of underwater use; the sealing method does not pass through surface auxiliary agents, reduces processing steps and reduces industrial realization difficulty.
Regarding adhesion of rubber to metal, rubber is generally used as one of the composite materials during use, for example: the tyre, rubber tube and adhesive tape contain metal, fiber and other skeleton material as strength support, while the rubber is used as sealing, protecting and isolating material, and the rubber itself performance and the adhesion performance of the rubber and the skeleton material are considered during the manufacture.
In specific implementation, the third aspect of the invention provides a sealing method for an underwater ultrasonic transducer working face, and the supported ultrasonic transducer comprises a plurality of vibration elements comprising vibration plates and a base, wherein the vibration elements are selected to be different values according to the required sound intensity, and in the embodiment, the vibration elements are 72; the vibration plate is sealed by the material through a base and is connected to the spherical bracket;
a plurality of through mounting holes are uniformly formed in the spherical inner wall of the spherical bracket, and a vibrating element is correspondingly arranged in each mounting hole. As an example, the mounting holes are provided with five to seven turns in total from the bottom to the top of the spherical bracket. Uniformly dividing a spherical bracket provided with vibration elements into K sectors, wherein the vibration elements with the same number are distributed in each sector; the K is more than or equal to 2 and less than or equal to 20; in the embodiment, the device is divided into 9 sectors, and the number of vibration elements of each sector is 8; for vibration elements in each sector, the vibration elements can be divided into a plurality of groups to form a plurality of vibration slice units; the number of vibration elements included in the vibration element unit is more than or equal to 2 and less than or equal to 20; in particular to the embodiment, the number of vibration elements in the vibration element unit is 2; each sector comprises 4 vibrating element units;
the method comprises the following steps:
s1, forming vibration elements by vibration plates, fixing the vibration elements on a spherical bracket, and then performing line protection to obtain the spherical bracket after line protection; the step S1, when embodied, comprises the following steps:
s11, welding a lead to the back of the vibration plate;
s12, mounting a vibration plate with a wire welded on the back surface on the spherical bracket to form a vibration element;
s13, enabling the vibrating element welded with the lead to pass through a vibrating piece mounting hole on the spherical bracket;
s14, fixing the vibration element penetrating through the vibration piece mounting hole on the spherical bracket;
and S15, wrapping the lead on the back of the spherical bracket, and finishing line protection.
Each pair of wires on the back of the spherical bracket corresponds to each vibrating element, the corresponding wires are welded on the corresponding vibrating plates, and the welded wires penetrate through the spherical bracket, are bound up through a binding belt and are closely fixed on the hole site after being bound up through a heat shrinkage tube; the bunching is carried out in a specific implementation mode, and 2 pairs of wires are correspondingly arranged; and each pair of wires corresponds to one vibrating element and is fixed by a heat shrinkage tube.
S2, smearing sealing glue solution on the surface of the vibrating element on the spherical bracket after the protection of the S1 circuit;
the sealing glue solution is prepared from the following components in parts by weight: 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent;
the curing agent is dibutyl tin dilaurate in specific implementation; the peroxide vulcanizing agent is benzoyl peroxide in specific implementation;
the methyl silicone rubber comprises high molecular weight series block methyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight of the methyl silicone rubber is 3-6 ten thousand;
the methyl vinyl silicone rubber comprises high molecular weight series block methyl vinyl silicone rubber or ultrahigh molecular weight methyl vinyl silicone rubber, wherein the molecular weight of the methyl vinyl silicone rubber is 3-6 ten thousand;
the silver methacrylate/zinc methacrylate increases the similarity of ion polarity formed by silver plating on the surface of the vibration plate and increases the bonding performance with metal;
the zinc methacrylate/silver methacrylate is used as organic olefine acid salt, so that the adhesion performance of the preparation material with plastic ABS is improved through winding and addition reaction of the preparation material with styrene butadiene acrylonitrile molecular chains.
The preparation process of the glue sealing liquid comprises the following steps:
s21, banburying methyl silicone rubber, a curing agent, a defoaming agent, zinc methacrylate/silver methacrylate, methyl vinyl silicone rubber and a peroxide vulcanizing agent to obtain a prepared rubber compound;
s22, removing gas in the prepared rubber compound to obtain the rubber compound with the gas removed, wherein the rubber compound is specifically as follows: degassing the prepared rubber compound by using a vacuum pump until the vacuum degree value is stable and does not decrease;
the rubber compound is a sealing glue solution;
s3, pouring the sealing glue solution with the gas removed into a transducer, shaking uniformly, standing and degassing;
s4, pressing the die;
s5, demolding: and (5) when the sealing glue solution is solidified, unscrewing the nut, taking down the die, and cleaning the glue surface.
As a comparative example, the sealing step not using the sealing method of the present invention is required to be performed as follows before S2: 1) The vibration plate is adhered and fixed with the metal base after being smeared with alpha-ethyl cyanoacrylate;
2) Bonding the ABS and the base by using organic silicone;
namely: s2 is replaced with: coating alpha-ethyl cyanoacrylate on the surface of the vibrating element on the spherical bracket after the S1 line protection, then bonding and fixing the vibrating element with a metal base, and bonding ABS and a vibrating piece base by using organic silicone; the silica gel liquid prepared by the invention can omit the step.
S4 specifically comprises the following steps:
s41, respectively screwing the upper surfaces of nuts on the screw rods on the lower die to positions T millimeters from the tops of the screw rods, wherein when the concrete implementation is carried out, the T is 12;
s42, lifting the upper die, moving the upper die to a position above the position of the lower die, aligning the relative positions of the upper die and the lower die, enabling a guide post of the lower die to penetrate into a guide hole of the upper die, and slowly dropping the upper die to the position of the nut;
s43, sequentially rotating nuts at the top of the screw rod to enable the upper die to uniformly descend until the edge of the upper die is completely attached to the upper end face of the transducer and stands still;
s44, respectively screwing nuts above the screw rods, and screwing the nuts until the nuts cannot be screwed.
The method provides a surface protection material of ultrasonic treatment equipment, which is prepared from the following components in parts by weight; 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of dibutyl tin dilaurate (curing agent), 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of benzoyl peroxide (peroxide vulcanizing agent).
In the present method, unless otherwise specified, all the raw materials used are commercially available in the art.
The methyl silicone rubber high molecular weight linear saturated rubber polymer used by the material and the preparation method has good ageing resistance, water resistance and medical safety, a small amount of double bonds are added into a body through mixing the methyl silicone rubber and the methyl vinyl silicone rubber, metal ions are introduced through adding benzoyl oxide (peroxide vulcanizing agent) and zinc methacrylate/silver methacrylate, and the adhesive force between the rubber body and the metal of a device is increased through the polar action of the metal and the metal. Has the following advantages:
1. the ionic polarity similarity formed by silver acrylate/zinc acrylate and the silver plating layer on the surface of the vibration plate is increased, so that the bonding performance with metal is improved;
2. the bonding performance with plastics (ABS) is improved through the winding and addition reaction of organic olefine acid and styrene butadiene acrylonitrile molecular chain;
3. the organic macromolecular chains are adsorbed on the surface of the inorganic matters by the surface adsorption effect to form better mechanical properties. Finally, the effect of enhancing the bonding performance with three different materials is achieved.
The specific implementation method comprises the following steps: in the method, the weight part of methyl silicone rubber in the raw material of the surface protection material of the treatment unit of ultrasonic treatment equipment is preferably 94-99 parts, more preferably 96 parts;
the methyl silicone rubber comprises high molecular weight series block methyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight is 3-6 ten thousand, preferably the viscosity average molecular weight is 5-6 ten thousand;
based on the weight parts of the methyl silicone rubber, the weight parts of the curing agent in the raw materials of the surface protection material of the treatment unit of the ultrasonic treatment equipment provided by the method are preferably 0.6-1.0 parts, more preferably 0.7 parts;
in the method, the curing agent is dibutyl tin dilaurate which is a catalyst for synthesizing urethane and vulcanizing rubber at room temperature, the relative molecular weight is 631.56, the relative density is 1.066, the freezing point is 8-16 ℃, and the boiling point is more than 200 ℃;
based on the weight parts of the methyl silicone rubber, the preferable parts of the methyl vinyl silicone rubber in the raw materials of the surface protection material of the treatment unit of the ultrasonic treatment equipment provided by the method are 1-6 parts, and more preferably 4 parts.
The methyl silicone rubber comprises high molecular weight series block methyl vinyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight is 3-6 ten thousand, preferably the viscosity average molecular weight is 5-6 ten thousand;
based on the weight parts of methyl silicone rubber, the preferred weight parts of the defoamer in the raw materials of the surface protection material of the treatment unit of the ultrasonic treatment equipment provided by the method are 1.8-2 parts;
in the method, the defoaming agent is an organosilicon defoaming agent.
Based on the weight parts of the methyl silicone rubber, the preferable weight parts of zinc methacrylate/silver methacrylate in the raw materials of the surface protection material of the treatment unit of the ultrasonic treatment equipment provided by the method are 0.5-0.7 part;
based on the weight parts of methyl silicone rubber, the peroxide vulcanizing agent in the raw material of the surface protection material of the treatment unit of the ultrasonic treatment equipment provided by the method is preferably 0.3-0.4 part by weight;
in the method, the peroxide vulcanizing agent is benzoyl peroxide, is white crystalline powder at normal temperature and can be used as a rubber vulcanizing agent, and the method is mainly used for increasing a part of metal polar ions in a body through a small amount of vulcanization, so that the surface adsorption performance with other materials is enhanced.
Example 1
Mixing 96 parts by mass of methyl silicone rubber, 4 parts by mass of methyl vinyl silicone rubber, 0.7 part by mass of curing agent, 0.15 part by mass of defoamer, 0.6 part by mass of zinc methacrylate/silver methacrylate and 0.3 part by mass of peroxide vulcanizing agent; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound; introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 2:1, a step of; and (3) placing the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 80 ℃ to obtain the material of the example 1.
Example 2
Mixing 98 parts by mass of methyl silicone rubber, 2 parts by mass of methyl vinyl silicone rubber, 1 part by mass of curing agent, 0.4 part by mass of defoamer, 0.4 part by mass of zinc methacrylate/silver methacrylate and 0.2 part by mass of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 1:2; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound; introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization; and (3) putting the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 90 ℃ to obtain the material of the example 2.
Example 3
Mixing 90 parts by mass of methyl silicone rubber, 10 parts by mass of methyl vinyl silicone rubber, 0.8 part by mass of curing agent, 0.2 part by mass of defoamer, 1.0 part by mass of zinc methacrylate/silver methacrylate and 0.5 part by mass of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 1:3, a step of; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
and (3) placing the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 70 ℃ to obtain the material of the example 3.
Example 4
Mixing 94 parts by mass of methyl silicone rubber, 6 parts by mass of methyl vinyl silicone rubber, 0.6 part by mass of curing agent, 0.2 part by mass of defoamer, 0.8 part by mass of zinc methacrylate/silver methacrylate and 0.4 part by mass of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 1:1, a step of; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
and (3) placing the device subjected to the first-stage room temperature vulcanization in a high-temperature box for vulcanization at 100 ℃ to obtain the material of the example 4.
Example 5
Mixing 100 parts by mass of methyl silicone rubber, 0 part by mass of methyl vinyl silicone rubber, 2 parts by mass of curing agent, 0.5 part by mass of defoamer, 0.2 part by mass of zinc methacrylate/silver methacrylate and 0.1 part by mass of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 2:1, a step of; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
and (3) placing the device subjected to the first-stage room temperature vulcanization in a high-temperature box for 75 ℃ vulcanization to obtain the material of the example 5.
Example 6
Mixing 92 parts by mass of methyl silicone rubber, 8 parts by mass of methyl vinyl silicone rubber, 1.5 parts by mass of curing agent, 0.3 part by mass of defoamer, 0.6 part by mass of methyl zinc acrylate/silver methacrylate and 0.4 part by mass of peroxide vulcanizing agent;
the curing agent adopts dibutyl tin dilaurate/methyltriethoxysilane in proportion; the ratio is 1:1, a step of; placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
and (3) placing the device subjected to the first-stage room temperature vulcanization in a high-temperature box for 95 ℃ vulcanization to obtain the material of the example 6.
Comparative example 1
Mixing 100 parts by mass of methyl silicone rubber, 0 part by mass of methyl vinyl silicone rubber, 1.2 parts by mass of curing agent, 1.8 parts by mass of defoamer, 0 part by mass of zinc methacrylate/silver methacrylate and 0 part by mass of peroxide vulcanizing agent;
placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization to obtain a comparison material.
Comparative example 2
Mixing 80 parts by mass of methyl silicone rubber, 20 parts by mass of methyl vinyl silicone rubber, 0.5 part by mass of curing agent, 1.8 parts by mass of defoamer, 1.0 part by mass of zinc methacrylate/silver methacrylate and 0.8 part by mass of peroxide vulcanizing agent;
placing the prepared rubber compound into a vacuum box to remove gas in the rubber compound;
introducing the rubber compound with the gas removed into a die and equipment fittings for first-stage room temperature vulcanization;
and (3) putting the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 70 ℃ to obtain the contrast material.
The present invention is not described in detail in part as being well known to those skilled in the art. While the foregoing describes illustrative embodiments of the present invention to facilitate an understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but is to be construed as protected by the accompanying claims insofar as various changes are within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (10)
1. The sealing method of the working face of the underwater ultrasonic transducer comprises a plurality of vibrating elements, wherein the vibrating elements consist of vibrating plates and vibrating plate bases connected with the vibrating plates, the number of the vibrating elements ranges from 20 to 500, and the vibrating elements are sealed by materials and connected to a spherical bracket, and the sealing method is characterized by comprising the following steps:
s1, mounting a vibration plate on a vibration plate base to form a vibration element, fixing the vibration element on a spherical bracket, and then performing line protection to obtain a spherical bracket after line protection;
s2, smearing sealing glue solution on the surface of the vibration element on the spherical bracket after the line protection obtained in the S1;
the sealing glue solution is prepared from the following components in parts by weight: 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent;
and the preparation process of the sealing glue solution comprises the following steps:
s21, banburying methyl silicone rubber, a curing agent, a defoaming agent, zinc methacrylate/silver methacrylate, methyl vinyl silicone rubber and a peroxide vulcanizing agent to obtain a prepared rubber compound;
s22, removing gas in the prepared rubber compound to obtain the rubber compound with the gas removed, wherein the rubber compound is specifically as follows: degassing the prepared rubber compound by using a vacuum pump until the vacuum degree value is stable and does not decrease;
s3, pouring the sealing glue solution with the gas removed into a transducer, shaking uniformly, standing and degassing;
after the glue sealing solution is prepared, the glue sealing solution is subjected to the following steps:
s4, pressing the die;
s5, demolding: when the sealing glue solution is solidified, unscrewing the nut, taking down the die, and cleaning the glue surface;
so far, through S1 to S5, the vibration element is sealed by materials and is connected to the spherical bracket.
2. The method for sealing a working surface of an underwater ultrasonic transducer according to claim 1, wherein the step S1 is specifically:
s11, welding a lead to the back of the vibration plate;
s12, mounting a vibration plate with a wire welded on the back surface on the spherical bracket to form a vibration element;
s13, enabling the vibrating element welded with the lead to pass through a vibrating piece mounting hole on the spherical bracket;
s14, fixing the vibration element penetrating through the vibration piece mounting hole on the spherical bracket;
and S15, wrapping the lead on the back of the spherical bracket, and finishing line protection.
3. The sealing method for the working surface of the underwater ultrasonic transducer according to claim 2, wherein a plurality of through mounting holes are uniformly formed in the spherical inner wall of the spherical bracket in the step S14, and a vibrating element is correspondingly arranged in each mounting hole.
4. The method for sealing the working surface of an underwater ultrasonic transducer according to claim 2, wherein each pair of wires on the back surface of the spherical bracket corresponds to each vibrating element in the step S15, the corresponding wires are welded on the corresponding vibrating plates, and the welded wires pass through the spherical bracket, are pricked by a binding belt and are closely fixed on the hole site after being gathered by a heat shrinkage tube.
5. The method for sealing a working surface of an underwater ultrasonic transducer according to claim 4, wherein the bunching corresponds to 2 to 6 pairs of wires; and each pair of wires corresponds to one vibrating element and is treated by a heat shrinkage tube.
6. The method for sealing the working surface of the underwater ultrasonic transducer according to claim 1, wherein S4 is specifically:
s41, respectively screwing the upper surfaces of nuts on the upper screw rods of the lower die to positions T millimeters away from the tops of the screw rods;
t is more than or equal to 5 and less than or equal to 15;
s42, lifting the upper die, moving the upper die to a position above the position of the lower die, aligning the relative positions of the upper die and the lower die, enabling a guide post of the lower die to penetrate into a guide hole of the upper die, and slowly dropping the upper die to the position of the nut;
s43, sequentially rotating nuts at the top of the screw rod to enable the upper die to uniformly descend until the edge of the upper die is completely attached to the upper end face of the transducer and stands still;
s44, respectively screwing nuts above the screw rods, and screwing the nuts until the nuts cannot be screwed.
7. The sealing material for the working face of the underwater ultrasonic transducer can increase the metal adhesion with the silver plating layer on the surface of the vibration plate and the adhesion performance with plastic ABS and ceramics, and is characterized by comprising the following components in parts by weight: 90-100 parts of methyl silicone rubber, 0-10 parts of methyl vinyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoamer, 0.2-1 part of zinc methacrylate/silver methacrylate and 0.1-0.5 part of peroxide vulcanizing agent.
8. The sealing material for the working surface of an underwater ultrasonic transducer according to claim 7, wherein the curing agent is dibutyl tin dilaurate/methyltriethoxysilane in a mixture ratio; the range of the proportion is 2:1 to 1:3, a step of; the methyl silicone rubber comprises high molecular weight series block methyl silicone rubber or ultrahigh molecular weight methyl silicone rubber, and the molecular weight of the methyl silicone rubber is 3-6 ten thousand; the methyl vinyl silicone rubber comprises high molecular weight series block methyl vinyl silicone rubber or ultrahigh molecular weight methyl vinyl silicone rubber, and the molecular weight of the methyl vinyl silicone rubber is 3-6 ten thousand.
9. The preparation method of the sealing material of the working face of the underwater ultrasonic transducer is characterized by comprising the following steps:
step1, banburying methyl silicone rubber, a curing agent, a defoaming agent, zinc methacrylate/silver methacrylate, methyl vinyl silicone rubber and a peroxide vulcanizing agent to obtain a prepared rubber compound;
90-100 parts of methyl silicone rubber, 0.6-2 parts of curing agent, 0.15-0.5 part of defoaming agent, 0.2-1 part of zinc methacrylate/silver methacrylate, 0-10 parts of methyl vinyl silicone rubber and 0.1-0.5 part of peroxide vulcanizing agent;
step2, removing gas in the prepared rubber compound to obtain the rubber compound with the gas removed;
step3, introducing the gas-removed rubber compound into a die and equipment accessories to carry out first-stage room temperature vulcanization to obtain a device after the first-stage room temperature vulcanization;
step4, placing the device subjected to the first-stage room temperature vulcanization into a high-temperature box for vulcanization at 70-100 ℃ to obtain the high-frequency resistant rubber outer layer material used underwater.
10. The method for preparing the sealing material of the working surface of the underwater ultrasonic transducer according to claim 9, wherein Step2 is performed to remove the gas inside the prepared rubber compound, specifically: and placing the prepared rubber compound into a vacuum box, and starting a vacuum pump to discharge free gas and dissolved gas in the rubber compound through an automatic exhaust valve.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5488957A (en) * | 1994-11-21 | 1996-02-06 | General Electric Company | System and method for promoting adhesion between lens and matching layer of ultrasonic transducer |
| CN1506431A (en) * | 2002-12-06 | 2004-06-23 | 涛 周 | Method and sealing glue for preventing heat leakage of boiler |
| CN102634295A (en) * | 2012-04-19 | 2012-08-15 | 长春中科应化特种材料有限公司 | Insulation high-temperature-resistant pressure-sensitive adhesive tap and preparation method thereof |
| CN104031604A (en) * | 2014-06-27 | 2014-09-10 | 上海回天新材料有限公司 | Organic silicon pouring sealant with thixotropy |
| CN105505292A (en) * | 2016-01-07 | 2016-04-20 | 东莞市日源盛橡胶绝缘制品有限公司 | Vulcanized silicone rubber formula and preparing technology thereof |
| CN106190007A (en) * | 2016-07-22 | 2016-12-07 | 航天材料及工艺研究所 | A kind of cold curing electrically insulating silicone rubber of resistance to ablation adhesive and preparation method thereof |
| CN110894419A (en) * | 2019-12-05 | 2020-03-20 | 东莞市源岭硅胶科技有限公司 | Flame-retardant silica gel and preparation method thereof |
| CN111205785A (en) * | 2020-03-26 | 2020-05-29 | 陆桂玲 | Solid adhesive film for bonding metal and rubber and preparation method thereof |
| US11118057B1 (en) * | 2020-04-09 | 2021-09-14 | China University Of Petroleum (Beijing) | Attenuation material composition, attenuation material and preparation method and use thereof |
| CN113698894A (en) * | 2021-09-22 | 2021-11-26 | 青岛三祥科技股份有限公司 | Ethylene-propylene rubber cement composition and preparation method thereof |
-
2024
- 2024-02-06 CN CN202410166306.8A patent/CN117701242B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5488957A (en) * | 1994-11-21 | 1996-02-06 | General Electric Company | System and method for promoting adhesion between lens and matching layer of ultrasonic transducer |
| CN1506431A (en) * | 2002-12-06 | 2004-06-23 | 涛 周 | Method and sealing glue for preventing heat leakage of boiler |
| CN102634295A (en) * | 2012-04-19 | 2012-08-15 | 长春中科应化特种材料有限公司 | Insulation high-temperature-resistant pressure-sensitive adhesive tap and preparation method thereof |
| CN104031604A (en) * | 2014-06-27 | 2014-09-10 | 上海回天新材料有限公司 | Organic silicon pouring sealant with thixotropy |
| CN105505292A (en) * | 2016-01-07 | 2016-04-20 | 东莞市日源盛橡胶绝缘制品有限公司 | Vulcanized silicone rubber formula and preparing technology thereof |
| CN106190007A (en) * | 2016-07-22 | 2016-12-07 | 航天材料及工艺研究所 | A kind of cold curing electrically insulating silicone rubber of resistance to ablation adhesive and preparation method thereof |
| CN110894419A (en) * | 2019-12-05 | 2020-03-20 | 东莞市源岭硅胶科技有限公司 | Flame-retardant silica gel and preparation method thereof |
| CN111205785A (en) * | 2020-03-26 | 2020-05-29 | 陆桂玲 | Solid adhesive film for bonding metal and rubber and preparation method thereof |
| US11118057B1 (en) * | 2020-04-09 | 2021-09-14 | China University Of Petroleum (Beijing) | Attenuation material composition, attenuation material and preparation method and use thereof |
| CN113698894A (en) * | 2021-09-22 | 2021-11-26 | 青岛三祥科技股份有限公司 | Ethylene-propylene rubber cement composition and preparation method thereof |
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