CN112576662A - Submarine tunnel brake pad - Google Patents
Submarine tunnel brake pad Download PDFInfo
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- CN112576662A CN112576662A CN202011592188.5A CN202011592188A CN112576662A CN 112576662 A CN112576662 A CN 112576662A CN 202011592188 A CN202011592188 A CN 202011592188A CN 112576662 A CN112576662 A CN 112576662A
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- Prior art keywords
- brake pad
- temperature
- fiber
- rubber
- nitrile rubber
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- 239000000835 fiber Substances 0.000 claims abstract description 21
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 20
- 229920001971 elastomer Polymers 0.000 claims abstract description 19
- 239000005060 rubber Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 claims abstract description 8
- -1 boron modified phenolic resin Chemical class 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 7
- 239000004927 clay Substances 0.000 claims abstract description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003063 flame retardant Substances 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 7
- 239000010455 vermiculite Substances 0.000 claims abstract description 7
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 7
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 7
- 239000002025 wood fiber Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 241000357293 Leptobrama muelleri Species 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 230000009977 dual effect Effects 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- 230000003685 thermal hair damage Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
- F16D69/028—Compositions based on metals or inorganic oxides containing fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/002—Combination of different friction materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/045—Bonding
- F16D2069/0466—Bonding chemical, e.g. using adhesives, vulcanising
- F16D2069/0475—Bonding chemical, e.g. using adhesives, vulcanising comprising thermal treatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0491—Tools, machines, processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0052—Carbon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0056—Elastomers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0038—Surface treatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0061—Joining
- F16D2250/0069—Adhesive bonding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0092—Tools or machines for producing linings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a brake pad for a submarine tunnel, and aims to solve the problem of manufacturing the brake pad for the submarine tunnel. The technical scheme of the invention is as follows: the weight percentage of each component is as follows: 8-10% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-1% of rubber vulcanizing agent, 0.3-0.5% of anti-aging agent, 8-10% of boron modified phenolic resin, 3-5% of nitrile rubber powder, 4-6% of reduced iron powder, 2-3% of diatomite, 1-2% of silicon carbide, 1-2% of aluminum oxide, 4-6% of flame retardant, 1-2% of vermiculite, 1-2% of iron oxide black, 3-5% of pottery clay, 6-8% of barium sulfate, 2-3% of flake graphite, 4-6% of wood fiber, 10-12% of polyvinyl alcohol fiber, 10-12% of soluble fiber and 6-10% of steel fiber; the friction body of the invention is mainly made of high molecular material, and the product has the characteristics of light specific gravity, moderate hardness, no thermal damage to the dual braking surfaces, stable and comfortable braking, long service life and the like while meeting the braking requirement.
Description
Technical Field
The invention belongs to a railway braking device, and particularly relates to a brake pad suitable for a submarine tunnel.
Background
With the increase of population and the development of urbanization, land resources are increasingly in short supply, the requirement of human beings on the environment is higher and higher, the characteristic that the tunnel is positioned underground can effectively save land, and the tunnel becomes a good choice by protecting the environment. With the generalization of underground space utilization, the tunnel can guarantee driving safety, shortens the journey, avoids advantages such as calamity also to impel tunnel construction technique to take place qualitative change moreover. The development of the tunnel also puts forward higher requirements for the running of corresponding vehicles, reduces energy consumption, reduces emission, improves safety and becomes the mainstream of the development of the tunnel, the rapid development of the railway technology in China and the braking technology of submarine tunnel vehicles also face significant innovation. In order to achieve the aim of energy conservation and emission reduction, various energy-saving technologies need to be applied, wherein various composite materials are adopted to be fused to meet the actual use requirements. Through the design, the submarine tunnel vehicle has remarkable effects of improving safety, reducing noise and improving riding comfort, so that the submarine tunnel vehicle can be widely applied to the submarine tunnel vehicle.
The invention aims to solve the problems that: because the submarine tunnel has poor ventilation and is not easy to be subjected to excessive vibration in the special environment, the submarine tunnel brake pad which is suitable for being wetted, is not easy to generate smoke due to friction and cannot generate resonance due to vibration corresponding to the tunnel generated by braking is required to be manufactured.
Disclosure of Invention
In order to remedy the above-mentioned drawbacks of the prior art, the object of the present invention is to make a railcar brake pad for submarine tunnels.
The invention aims to realize the composition of the friction body by the following technical scheme, wherein the friction body comprises nitrile rubber, a rubber accelerator, a rubber vulcanizing agent, an anti-aging agent, phenolic resin, nitrile rubber powder, iron powder, silicon carbide, aluminum oxide, diatomite, a flame retardant, vermiculite, iron oxide black, pottery clay, barium sulfate, crystalline flake graphite, wood fiber, polyvinyl alcohol fiber, soluble fiber and steel fiber; the weight percentage of each component is as follows: 8-10% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-1% of rubber vulcanizing agent, 0.3-0.5% of anti-aging agent, 8-10% of boron modified phenolic resin, 3-5% of nitrile rubber powder, 4-6% of reduced iron powder, 2-3% of diatomite, 1-2% of silicon carbide, 1-2% of aluminum oxide, 4-6% of flame retardant, 1-2% of vermiculite, 1-2% of iron oxide black, 3-5% of pottery clay, 6-8% of barium sulfate, 2-3% of flake graphite, 4-6% of wood fiber, 10-12% of polyvinyl alcohol fiber, 10-12% of soluble fiber and 6-10% of steel fiber;
the preparation method of the submarine tunnel brake pad comprises the following steps:
1) the nitrile rubber is open-milled in two sections, the roll temperature of the first section is 40-45 ℃, the roll gap is 2-3 mm, the raw rubber is firstly added, and then the zinc oxide, the anti-aging agent and the carbon black are added, and the mixture is taken out and placed; the second section of roller temperature is 35-40 ℃, the roller spacing is 3-4 mm, first section of glue is added, the cutting knife is uniformly mixed, sulfur is added, and the cutting knife is thin and through after all the glue is mixed;
2) adding the glue obtained in the step 1) and the rest components of the friction body into an internal mixer for pressure mixing, controlling the temperature to be less than or equal to 90 ℃, intensively mixing, standing and cooling to room temperature to obtain a mixture;
3) pressing the mixture prepared in the step 2) on a specific steel back by using a mold, heating to 170 ℃ and 180 ℃ for hot press forming under the pressure of a press machine of 20-24 MPa to obtain a formed semi-finished product;
4) clamping the semi-finished product obtained in the step 3) in a self-made special clamp, and applying a pressure of about 10KN/m 2;
5) and (3) performing thermal treatment on the treated brake pad in an oven by adopting hot air circulation electric heating for 40H, gradually raising the temperature of the first 24H until the highest thermal treatment temperature reaches 250 ℃, keeping the thermal treatment temperature at 250 ℃ for the second 16H, fully reacting all the raw materials, and ensuring complete maturity to obtain the synthetic brake shoe. The heat treatment adopts a sectional heat treatment mode, the temperature is gradually increased, the surface of the brake pad is ensured to be consistent with the internal temperature thereof, the maturation degree of the composite material is ensured to be consistent, and the effective heat treatment can be ensured by adopting hot air circulation electric heating.
The invention has the advantages that: 1. the organic synthetic brake pad product developed by our company does not contain asbestos, lead and other substances which may harm human health, and belongs to an environment-friendly product;
2. the friction body is mainly made of high polymer materials, and the friction body has the characteristics of light specific gravity, moderate hardness, no thermal damage to the dual braking surfaces, stable and comfortable braking, long service life and the like while meeting the braking requirement;
3. the friction material adhesive of the invention adopts the boron modified phenolic resin, the boron modified phenolic resin has better adhesion and heat resistance after being fused with other materials, the braking is more comfortable and stable, the noise is effectively reduced, and the problems of overhigh modulus, overlow strength, high noise, low thermal decomposition temperature and unstable decomposed residue performance of a friction layer caused by the friction material taking pure phenolic resin as a matrix in the traditional process are avoided, so the boron modified phenolic resin is the optimal selection suitable for the process requirement of the synthetic brake pad.
4. The friction body material is formed by blending the nitrile rubber and the rubber powder, and compared with natural rubber and styrene butadiene rubber, the nitrile rubber has the characteristics of high elasticity, good wear resistance, good cold resistance, low heat generation, good bending resistance, flexibility resistance, dynamic performance and the like, and after vulcanization, the friction body material is particularly excellent in cold resistance, wear resistance and elasticity, less in heat generation under dynamic load, aging resistance, and the rubber powder is easy to disperse and blend for use, so that the performance of the friction body material is more stable, and the like. The nitrile rubber has good weather resistance and can be well adapted to the actual operation condition of a closed humid environment.
Detailed Description
The present invention will be described in detail with reference to the following examples.
The first embodiment is as follows:
the technical scheme adopted by the invention is as follows: the submarine tunnel brake pad comprises a friction body and a steel backing, wherein the friction body is made of nitrile rubber, a rubber accelerator, a rubber vulcanizing agent, an anti-aging agent, boron modified phenolic resin, nitrile rubber powder, iron powder, silicon carbide, aluminum oxide, diatomite, a flame retardant, vermiculite, iron oxide black, pottery clay, barium sulfate, crystalline flake graphite, wood fiber, polyvinyl alcohol fiber, soluble fiber and steel fiber; the weight percentage of each component is as follows: 9% of nitrile rubber, 0.75% of rubber accelerator, 0.8% of rubber vulcanizing agent, 0.5% of anti-aging agent, 9.5% of boron modified phenolic resin, 4% of nitrile rubber powder, 6% of reduced iron powder, 3% of diatomite, 2% of silicon carbide, 2% of aluminum oxide, 6% of flame retardant, 2% of vermiculite, 5% of iron oxide black, 5% of clay, 8% of barium sulfate, 5% of flake graphite, 5% of wood fiber, 10% of polyvinyl alcohol fiber, 10% of soluble fiber and 10% of steel fiber;
the preparation method of the submarine tunnel brake pad comprises the following steps:
1) the nitrile rubber is open-milled in two sections, the roll temperature of the first section is 40-45 ℃, the roll gap is 2-3 mm, the raw rubber is firstly added, and then the zinc oxide, the anti-aging agent and the carbon black are added, and the mixture is taken out and placed; the second section of roller temperature is 35-40 ℃, the roller spacing is 3-4 mm, first section of glue is added, the cutting knife is uniformly mixed, sulfur is added, and the cutting knife is thin and through after all the glue is mixed;
2) adding the glue obtained in the step 1) and the rest components of the friction body into an internal mixer for pressure mixing, controlling the temperature to be less than or equal to 90 ℃, intensively mixing, standing and cooling to room temperature to obtain a mixture;
3) pressing the mixture prepared in the step 2) on a specific steel back by using a mold, heating to 170 ℃ and 180 ℃ for hot press forming under the pressure of a press machine of 20-24 MPa to obtain a formed semi-finished product;
4) the press-formed semifinished product obtained in 3) was clamped in a self-made special jig, and a pressure of about 10KN/m2 was applied.
5) And (3) heating the treated brake pad in an oven by adopting hot air circulation electric heating for 36H, gradually raising the temperature of the first 24H until the highest heat treatment temperature reaches 250 ℃, keeping the heat treatment temperature at 250 ℃ for the second 16H, fully reacting all the raw materials, and ensuring complete maturity to obtain the synthetic brake shoe. The heat treatment adopts a sectional heat treatment mode, the temperature is gradually increased, the surface of the brake pad is ensured to be consistent with the internal temperature thereof, the maturation degree of the composite material is ensured to be consistent, and the effective heat treatment can be ensured by adopting hot air circulation electric heating.
TABLE 1 temperature and time during Heat treatment
| Temperature (. degree.C.) | Room temperature of 80 ℃ to 80% | 80 | 80~100 | 100 | 100~120 | 120 | 120~140 | 140 |
| Time (min) | 30 | 60 | 10 | 60 | 10 | 120 | 10 | 180 |
| Temperature (. degree.C.) | 140~160 | 160 | 160~180 | 180 | 180~200 | 200 | 200~220 | 220 |
| Time (min) | 15 | 180 | 15 | 180 | 15 | 180 | 15 | 240 |
| Temperature (. degree.C.) | 220~240 | 240 | 240~250 | 250 | ||||
| Time (min) | 15 | 240 | 15 | 960 |
The total temperature rise process is 24H, then the constant temperature of 250 ℃ is kept for 16 hours, and the whole heat treatment process is 36H.
The above description is only an embodiment of the present invention, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (2)
1. The submarine tunnel brake pad is characterized by comprising the following components: the friction body comprises nitrile rubber, a rubber accelerator, a rubber vulcanizing agent, an anti-aging agent, phenolic resin, nitrile rubber powder, iron powder, silicon carbide, aluminum oxide, diatomite, a flame retardant, vermiculite, iron oxide black, pottery clay, barium sulfate, flake graphite, wood fiber, polyvinyl alcohol fiber, soluble fiber and steel fiber; the weight percentage of each component is as follows: 8-10% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-1% of rubber vulcanizing agent, 0.3-0.5% of anti-aging agent, 8-10% of boron modified phenolic resin, 3-5% of nitrile rubber powder, 4-6% of reduced iron powder, 2-3% of diatomite, 1-2% of silicon carbide, 1-2% of aluminum oxide, 4-6% of flame retardant, 1-2% of vermiculite, 1-2% of iron oxide black, 3-5% of pottery clay, 6-8% of barium sulfate, 2-3% of flake graphite, 4-6% of wood fiber, 10-12% of polyvinyl alcohol fiber, 10-12% of soluble fiber and 6-10% of steel fiber.
2. The method for preparing a submarine tunnel brake pad according to claim 1, comprising the steps of:
1) the nitrile rubber is open-milled in two sections, the roll temperature of the first section is 40-45 ℃, the roll gap is 2-3 mm, the raw rubber is firstly added, and then the zinc oxide, the anti-aging agent and the carbon black are added, and the mixture is taken out and placed; the second section of roller temperature is 35-40 ℃, the roller spacing is 3-4 mm, first section of glue is added, the cutting knife is uniformly mixed, sulfur is added, and the cutting knife is thin and through after all the glue is mixed;
2) adding the glue obtained in the step 1) and the rest components of the friction body into an internal mixer for pressure mixing, controlling the temperature to be less than or equal to 90 ℃, intensively mixing, standing and cooling to room temperature to obtain a mixture;
3) pressing the mixture prepared in the step 2) on a specific steel back by using a mold, heating to 170 ℃ and 180 ℃ for hot press forming under the pressure of a press machine of 20-24 MPa to obtain a formed semi-finished product;
4) clamping the semi-finished product obtained in the step 3) in a self-made special clamp, and applying a pressure of about 10KN/m 2;
5) the treated brake pad is heated and treated for 40H in an oven by adopting hot air circulation electric heating, the temperature of the first 24H is gradually increased until the highest heat treatment temperature reaches 250 ℃, the heat treatment temperature of the second 16H is kept at 250 ℃, all raw materials are fully reacted, complete maturity is ensured, the synthetic brake pad is prepared, the heat treatment adopts a sectional heat treatment mode, the temperature is gradually increased, the surface of the brake pad is ensured to be consistent with the internal temperature of the brake pad, the maturity of the synthetic material is ensured to be consistent, and the hot air circulation electric heating can ensure effective performance of the heat treatment.
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| CN202011592188.5A CN112576662A (en) | 2020-12-29 | 2020-12-29 | Submarine tunnel brake pad |
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| CN202011592188.5A CN112576662A (en) | 2020-12-29 | 2020-12-29 | Submarine tunnel brake pad |
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