High-temperature-resistant solid tire applied to engineering machinery and preparation method of high-temperature-resistant solid tire

Abstract

The invention relates to the related technical field of tires for engineering machinery, in particular to a high-temperature-resistant solid tire applied to engineering machinery and a preparation method of the high-temperature-resistant solid tire, and the tire adopts a three-section composite structure and sequentially comprises a tread layer, a buffer layer and a base supporting layer from outside to inside. Structurally, the three-section type composite structure is clear in division of labor, the tread layer enhances ground gripping and heat dissipation, the buffer layer absorbs vibration, the base supporting layer guarantees rigidity and heat dissipation, and heavy load stability and complex road condition safety are guaranteed. In the aspects of materials and technologies, fluororubber and other high-temperature-resistant materials and functional filler are adopted, a liquid metal cooling system in the high-strength steel ring and honeycomb porous base rubber are combined, active and passive heat dissipation collaboration is achieved, the tire temperature is controlled within a safe range, the tire can stably work for a long time at the high temperature of 80-160 DEG C, and the service life of the tire is prolonged. And the continuous operation capability of equipment is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the related technical field of tires for engineering machinery, and in particular to a high-temperature-resistant solid tire applied to engineering machinery and a preparation method thereof. BACKGROUND

[0002] Engineering machinery is an important part of the equipment industry. In general, it refers to the mechanical equipment necessary for comprehensive mechanized construction engineering required by earthwork construction engineering, pavement construction and maintenance, mobile hoisting and unloading operations, and various building engineering. Engineering machinery is mainly used in national defense construction engineering, transportation construction, energy industry construction and production, mineral material industry construction and production, agricultural and water conservancy construction, industrial and civil building, urban construction, environmental protection, and other fields.

[0003] In the field of modern engineering machinery, loaders, pavers, and steel slag transport vehicles are widely used in high-temperature and heavy-load operating scenarios such as mining, road construction, and metallurgical smelting. Traditional pneumatic tires or ordinary solid tires have many defects under high-temperature working conditions. Pneumatic tires are prone to puncture and risk of tire blowout, and high temperatures can accelerate rubber aging and shorten service life. Although ordinary solid tires solve the problem of tire blowout, they have poor heat dissipation performance, and the rubber easily softens and deforms under high temperatures, resulting in reduced wear resistance and load capacity. In addition, the existing tires have insufficient cushioning performance and are difficult to effectively dissipate the impact force generated during the operation of engineering machinery, further exacerbating the damage to the tire structure, and cannot meet the efficient and safe operation requirements of engineering machinery under high-temperature, heavy-load, and complex road conditions. Therefore, there is an urgent need to develop a high-temperature-resistant solid tire applied to engineering machinery and a preparation method thereof. SUMMARY

[0004] The purpose of the present application is to provide a high-temperature-resistant solid tire applied to engineering machinery and a preparation method thereof to overcome the defects of the prior art, as described in detail below.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The present application provides a high-temperature-resistant solid tire applied to engineering machinery, which adopts a three-section composite structure, including a tread layer, a buffer layer, and a base support layer from outside to inside.

[0007] Preferably, the thickness of the tread layer is 50mm, the surface is provided with a deepened staggered block pattern with a depth of 30mm, and arc-shaped flow guide grooves are arranged on both sides of the tread.

[0008] Preferably, the thickness of the buffer layer is 20mm, and the buffer layer is composed of multiple layers of aramid fiber cords and high-temperature-resistant rubber.

[0009] Preferably, the base support layer is embedded with a high-strength steel ring with spiral-shaped heat dissipation grooves inside and wrapped with a 15mm-thick honeycomb porous base glue outside.

[0010] Preferably, the high-strength steel ring is internally provided with a closed-loop cooling pipeline filled with liquid metal cooling medium.

[0011] Preferably, the tread layer is made of tread rubber, which is mainly composed of fluorine rubber, 30% nano-aluminum oxide powder, 5% benzimidazole antioxidant, and appropriate vulcanizing agent, accelerator and plasticizer.

[0012] Preferably, the high-temperature-resistant rubber of the buffer layer is hydrogenated nitrile rubber, and the aramid fiber cord is compounded with rubber by dipping in a glue solution composed of hydrogenated nitrile rubber, solvent and adhesive.

[0013] Preferably, the base glue is made of silicone rubber, which forms a honeycomb porous structure through foaming process, and the internal pore diameter is 0.5mm-1mm, and 10% graphite powder is added to the base glue.

[0014] Preferably, the high-strength steel ring is made of alloy steel, and the machining precision of the heat dissipation groove is controlled within ±0.1mm, the cooling pipeline is formed in the steel ring by laser cladding, the pipeline inner diameter is 3mm-5mm, and the pipeline inner wall is plated with an anti-corrosion coating.

[0015] A preparation method of a high-temperature-resistant solid tire applied to engineering machinery, further comprising the following steps:

[0016] Step one: Tread rubber preparation: fluorine rubber is plasticized in a 100℃ internal mixer for 10 minutes, nano-aluminum oxide powder, benzimidazole antioxidant, vulcanizing agent, accelerator and plasticizer are added in sequence, mixed at 120℃ for 15 minutes, and then sheeted after 5 times of thin passage through an open mill for standby;

[0017] Step two: Buffer layer preparation: hydrogenated nitrile rubber is plasticized in an open mill at 60℃ roll temperature for 8 minutes, aramid fiber cord is dipped in a glue solution composed of hydrogenated nitrile rubber, solvent and adhesive for 3 minutes, and then bonded according to design requirements to form a buffer layer blank;

[0018] Step 3: Preparation of the base support layer: Alloy steel is machined to obtain a high-strength steel ring with spiral heat dissipation grooves on the surface; a closed-loop cooling pipe with an inner diameter of 3mm to 5mm is formed inside the steel ring using laser cladding technology, and the inner wall of the pipe is plated with an anti-corrosion coating; silicone rubber and graphite powder are kneaded at 110°C for 12 minutes, and a foaming agent is added and kneaded for another 5 minutes to obtain a base rubber compound, which is heated and pressurized at 160°C and 8MPa for 15 minutes to form a honeycomb porous base rubber, and the steel ring is embedded in it; liquid metal cooling medium is filled into the cooling pipe through a vacuum infusion process, and the pipe inlet and outlet are sealed;

[0019] Step 4: Tire molding and vulcanization: The tread rubber, buffer layer blank and base support layer are combined and molded on a molding machine, and then placed in a vulcanizer for vulcanization at 180°C and 12MPa pressure for 60 to 90 minutes.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The closed-loop cooling pipe inside the high-strength steel ring of the present invention is filled with liquid metal cooling medium, which can quickly dissipate heat from the tire interior and control the tire temperature within a safe range, ensuring the stable performance of various tire components and improving the continuous operation capability of the equipment;

[0022] 2. This invention adopts a three-section composite structure with a coordinated division of labor. The tread pattern and guide groove design provide good grip and heat dissipation; the buffer layer effectively absorbs vibration and stress; the base support layer provides rigid support and efficient heat dissipation, ensuring that the tire does not deform under heavy loads and does not slip under complex road conditions, thereby improving the stability and safety of construction machinery operations.

[0023] 3. The present invention adopts high-temperature resistant materials such as fluororubber, hydrogenated nitrile rubber, silicone rubber, etc., combined with functional fillers such as nano-alumina powder and graphite powder, and combines the liquid metal cooling system inside the high-strength steel ring with the honeycomb porous base rubber to achieve the synergistic effect of active and passive heat dissipation of the tire, so that the tire can operate stably for a long time in a high-temperature environment of 80℃-160℃, effectively solving the performance degradation problem of traditional tires caused by high temperature. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0025] The application provides a technical scheme: a high-temperature-resistant solid tire applied to engineering machinery, the tire adopts a three-section composite structure, and sequentially comprises a tread layer, a buffer layer and a base support layer from outside to inside, the three-section structure cooperates, the tread layer directly contacts the ground, bears wear resistance, slip resistance and heat dissipation functions; the buffer layer absorbs vibration and stress during operation of the engineering machinery and protects the tire body; and the base support layer provides structural support and heat dissipation guarantee and ensures overall stability of the tire, in use, the composite structure design improves comprehensive performance of the tire under high temperature, heavy load and other harsh working conditions, prolongs the service life, reduces the replacement frequency and reduces operation cost of the engineering machinery.

[0026] Further, the tread layer has a thickness of 50 mm, a surface is provided with deepened staggered block patterns with a depth of 30 mm, and arc-shaped flow guide grooves are arranged on both sides of the tread layer, the deepened staggered block patterns increase friction with the ground, provide good grip, guarantee stable driving of the engineering machinery under complex road conditions such as mud and gravel, the arc-shaped flow guide grooves can quickly guide out heat generated by friction between the tread and the ground, and simultaneously assist in water and mud drainage, in use, effectively prevent tire skidding, improve operation safety, accelerate heat dissipation speed, avoid tire tread softening and wear due to high temperature, prolong the service life of the tread, and are suitable for operation in harsh environments such as mines and construction sites.

[0027] Further, the buffer layer has a thickness of 20 mm and is composed of a plurality of layers of aramid fiber cords and high-temperature-resistant rubber, the aramid fiber cords have high strength and low elongation characteristics, and after being combined with the high-temperature-resistant rubber, can effectively disperse impact force and shear force received by the tire during operation of the engineering machinery and buffer vibration; simultaneously, the high-temperature-resistant rubber ensures that the buffer layer maintains good elasticity and toughness in a high-temperature environment, in use, reduces damage of vibration to the tire structure and protects other components inside the tire body; improves fatigue resistance of the tire, and enables the tire to maintain stable structure and performance under working conditions of frequent starting and stopping and turning.

[0028] Further, the base support layer is internally embedded with a high-strength steel ring with spiral-shaped heat dissipation grooves arranged on a surface, the heat dissipation grooves of the steel ring have a width of 5 mm and a depth of 8 mm, and the outside is wrapped with a honeycomb-shaped porous base rubber with a thickness of 15 mm, the high-strength steel ring provides rigid support for the tire and bears heavy load of the engineering machinery; the spiral-shaped heat dissipation grooves increase heat dissipation area and accelerate heat conduction; the honeycomb-shaped porous base rubber further enhances heat dissipation effect and simultaneously absorbs part of vibration through the porous structure, in use, ensures that the tire does not deform under heavy load and maintains stable operation of the engineering machinery; efficient heat dissipation can reduce internal temperature of the tire, prevent rubber aging and performance degradation of the steel ring due to excessively high temperature, and prolong the overall service life of the tire.

[0029] Further, the high-strength steel ring is internally provided with a closed circulation cooling pipeline, and the pipeline is filled with liquid metal cooling medium. When the tire is operated in a high-temperature environment, the heat generated by the tire is transferred to the steel ring, the liquid metal cooling medium absorbs the heat in the closed circulation pipeline and flows to dissipate the heat to the outside, thereby achieving active cooling of the tire. In use, the internal temperature of the tire can be greatly reduced, so that the tire can be stably operated in a high-temperature environment of 180-300℃ for a long time, and the continuous operation ability and reliability of the equipment are improved.

[0030] Further, the tread layer is made of tread rubber, the tread rubber takes fluorine rubber as a main material, and adds 30% of nano aluminum oxide powder, 5% of benzimidazole antioxidant, and appropriate vulcanizing agent, accelerator and plasticizer. The fluorine rubber has excellent high-temperature resistance, oil resistance and chemical corrosion resistance, and serves as the main material to endow the tread rubber with basic properties. The nano aluminum oxide powder can enhance the heat conductivity and wear resistance of the tread rubber. The benzimidazole antioxidant inhibits the oxidation aging of the rubber. The vulcanizing agent, accelerator and plasticizer optimize the processing performance and physical and mechanical properties of the rubber. In use, the tread layer has excellent high-temperature resistance, wear resistance and aging resistance, and can be used for a long time in a high-temperature and high-wear working condition, thereby reducing tread wear and aging and reducing replacement cost.

[0031] Further, the high-temperature resistant rubber of the buffer layer is hydrogenated nitrile rubber, and the aramid fiber cord is impregnated with a glue solution composed of hydrogenated nitrile rubber, solvent and adhesive to realize compounding with the rubber. The hydrogenated nitrile rubber has good high-temperature resistance, oil resistance and fatigue resistance. After compounding with the aramid fiber cord, the glue solution fills the gap between the fibers to enhance the adhesion between the two, so that the buffer layer becomes an integral whole to jointly bear stress and vibration. In use, the comprehensive performance of the buffer layer is improved, and the buffer layer can effectively buffer vibration and disperse stress to protect the tire structure and prolong the service life of the tire in a complex working condition of high temperature and contact with oil stains.

[0032] Further, the base rubber is made of silicone rubber, and a honeycomb porous structure is formed by a foaming process. The internal pore diameter is 0.5mm-1mm, and 10% of graphite powder is added to the base rubber. The silicone rubber itself has good high-temperature resistance, and the honeycomb porous structure formed by foaming increases the heat dissipation surface area of the base rubber. The graphite powder has high thermal conductivity and can accelerate heat transfer. The two work together to achieve efficient heat dissipation. At the same time, the porous structure can also play a certain buffering role. In use, the temperature of the base support layer is effectively reduced to ensure that the high-strength steel ring and the internal cooling system work at an appropriate temperature. The vibration is buffered to improve the stability and comfort of the tire and adapt to the complex working environment of engineering machinery.

[0033] Further, the high-strength steel ring is made of alloy steel material, the machining precision of the heat dissipation groove is controlled within ±0.1mm, the cooling pipeline is formed in the steel ring by laser cladding, the inner diameter of the pipeline is 3mm-5mm, the inner wall of the pipeline is plated with an anticorrosion coating, the alloy steel material ensures the high strength and rigidity of the steel ring, the machining precision of the heat dissipation groove is precisely controlled to ensure the consistency of the heat dissipation effect, the cooling pipeline formed by laser cladding is integrally formed with the steel ring, and the structure is stable; the anticorrosion coating on the inner wall of the pipeline prevents the pipeline from being corroded by the liquid metal cooling medium, and ensures the long-term stable operation of the cooling system. In use, the tire is provided with a reliable support structure, the effectiveness and durability of the cooling system are ensured, the tire can maintain stable performance under high temperature and heavy load working conditions, and tire damage caused by faults of the steel ring and the cooling system is reduced.

[0034] A preparation method of a high-temperature-resistant solid tire applied to engineering machinery, further comprising the following steps:

[0035] Step one: preparation of the tread rubber: the fluorine rubber is plasticized in a mixer at 100℃ for 10 minutes, nano-aluminum oxide powder, benzimidazole antioxidant, vulcanizing agent, accelerator and plasticizer are sequentially added, and mixing is performed at 120℃ for 15 minutes; after being passed through a two-roll mill for 5 times, a sheet is obtained for standby;

[0036] Step two: preparation of the buffer layer: the hydrogenated nitrile rubber is plasticized in a two-roll mill at a roll temperature of 60℃ for 8 minutes, the aramid fiber cord is dipped in a glue solution composed of hydrogenated nitrile rubber, solvent and adhesive for 3 minutes, and then the buffer layer blank is formed according to the design requirements;

[0037] Step three: preparation of the base support layer: the alloy steel is mechanically processed to obtain a high-strength steel ring with a spiral heat dissipation groove on the surface; a closed circulation cooling pipeline is formed in the steel ring by laser cladding technology, the inner diameter of the pipeline is 3mm-5mm, and the inner wall of the pipeline is plated with an anticorrosion coating; the silicone rubber and graphite powder are kneaded at 110℃ for 12 minutes, and then the foaming agent is added and kneaded for another 5 minutes to obtain the base rubber, the base rubber is heated and pressurized to foam at 160℃ and a pressure of 8MPa for 15 minutes to form a honeycomb-shaped porous base, and the steel ring is embedded in the base; the liquid metal cooling medium is filled into the cooling pipeline through a vacuum pouring process, and the inlet and outlet of the pipeline are sealed;

[0038] Step four: tire molding and vulcanization: the tread rubber, the buffer layer blank and the base support layer are combined and molded on a molding machine, and then placed in a vulcanizing machine and vulcanized at 180℃ and a pressure of 12MPa for 60-90 minutes.

[0039] The specific steps are as follows: the fluoroelastomer is plasticized in a Banbury mixer at 100°C for 10 minutes, and then nano-aluminum oxide powder, benzimidazole antioxidant, vulcanizing agent, accelerator and plasticizer are added in sequence and mixed at 120°C for 15 minutes, and then the mixture is passed through a two-roll mill for 5 times to obtain a sheet; the hydrogenated nitrile rubber is plasticized in a two-roll mill at a roller temperature of 60°C for 8 minutes, and then the aramid fiber cord is dipped in a glue solution composed of hydrogenated nitrile rubber, solvent and adhesive for 3 minutes, and then the cushion layer blank is prepared by bonding according to the design requirements; the alloy steel is mechanically processed to obtain a high-strength steel ring with a spiral-shaped heat dissipation groove on the surface; a closed cooling pipeline with an inner diameter of 3mm-5mm is formed in the steel ring by laser cladding technology, and the inner wall of the pipeline is coated with an anti-corrosion coating; the silicone rubber and graphite powder are kneaded at 110°C for 12 minutes, and then the foaming agent is added and kneaded for another 5 minutes to obtain the base glue, and the base glue is foamed into a honeycomb porous base by heating and pressurizing at 160°C and 8MPa for 15 minutes, and the steel ring is embedded in the base; the cooling pipeline is filled with liquid metal cooling medium by vacuum pouring process, and the inlet and outlet of the pipeline are sealed; the tread, the cushion layer blank and the base support layer are combined and formed on a forming machine, and then placed in a vulcanizing machine and vulcanized at 180°C and 12MPa for 60-90 minutes.

[0040] Example 1: High-temperature-resistant solid tire for mine loader

[0041] A high-temperature-resistant solid tire applied to engineering machinery has a three-section composite structure, and the tire specifications are 23.5-25, which are suitable for 50-ton mine loaders.

[0042] The tread layer has a thickness of 50mm, a surface depth of 30mm, and a width of 8mm, and is made of a tread rubber mainly composed of fluoroelastomer, 30% nano-aluminum oxide powder, 5% benzimidazole antioxidant, 2% vulcanizing agent, 1.5% accelerator and 3% plasticizer.

[0043] The cushion layer has a thickness of 20mm and is composed of 5 layers of aramid fiber cords and hydrogenated nitrile rubber, and the proportion of hydrogenated nitrile rubber in the cord dipping glue solution is 70%, the proportion of solvent is 25%, and the proportion of adhesive is 5%.

[0044] The base support layer has an outer diameter of 635mm, a heat dissipation groove width of 5mm, a depth of 8mm, and a cooling pipeline inner diameter of 3mm; the outer honeycomb porous base glue has a thickness of 15mm, the inner air hole diameter is 0.5mm-0.8mm, and 10% graphite powder is added.

[0045] A preparation method of a high-temperature-resistant solid tire applied to engineering machinery further comprises the following steps:

[0046] Step one: tread rubber preparation: 100 kg of fluororubber was put into the internal mixer and plasticized for 10 minutes at 100℃; 30 kg of nano-aluminum oxide powder, 5 kg of benzimidazole antioxidant, 2 kg of vulcanizing agent, 1.5 kg of accelerator and 3 kg of plasticizer were added in turn and mixed for 15 minutes at 120℃; after 5 times of thin passing through the open mill, the sheet was prepared for use;

[0047] Step two: buffer layer preparation: 50 kg of hydrogenated nitrile rubber was plasticized on the open mill at 60℃ for 8 minutes; aramid fiber cords were prepared and immersed in a glue solution composed of 35 kg of hydrogenated nitrile rubber, 12.5 kg of solvent and 2.5 kg of adhesive for 3 minutes, and 5 layers of cords were attached according to the design requirements to form a buffer layer blank;

[0048] Step three: base support layer preparation: high-strength steel rings were obtained by mechanical processing of alloy steel; closed circulation cooling pipes were formed inside the steel rings using laser cladding technology, and a nickel-phosphorus alloy corrosion-resistant coating with a thickness of 5μm was plated on the inner wall of the pipes; 80 kg of silicone rubber and 8 kg of graphite powder were kneaded at 110℃ for 12 minutes, and then foaming agent was added and kneaded for another 5 minutes to obtain the base rubber; the base rubber was heated and pressurized to foam at 160℃ and 8MPa for 15 minutes to form a honeycomb-shaped porous base rubber, which was embedded in the steel ring; vacuum infusion process was used to fill gallium-indium-tin alloy liquid metal cooling medium into the cooling pipes, and the inlet and outlet of the pipes were sealed;

[0049] Step four: tire molding and vulcanization: the prepared tread rubber, buffer layer blank and base support layer were combined and molded on the molding machine, and then placed in the vulcanizing machine and vulcanized at 180℃ and 12MPa for 70 minutes.

[0050] The specific steps are: 100 kg of fluoroelastomer is put into the internal mixer, plasticated at 100℃ for 10 minutes; 30 kg of nano alumina powder, 5 kg of benzimidazole antioxidant, 2 kg of vulcanizing agent, 1.5 kg of accelerator and 3 kg of plasticizer are added in turn, and mixed at 120℃ for 15 minutes; after 5 times of thin pass through the open mill, the sheet is taken out for standby; 50 kg of hydrogenated nitrile rubber is plasticated at 60℃ roll temperature of the open mill for 8 minutes; aramid fiber cord is prepared, immersed in a glue solution composed of 35 kg of hydrogenated nitrile rubber, 12.5 kg of solvent and 2.5 kg of adhesive for 3 minutes, and 5 layers of cord are attached according to the design requirements to form a buffer layer blank; the alloy steel is mechanically processed to obtain a high-strength steel ring; a closed circulation cooling pipeline is formed in the steel ring by laser cladding technology, a nickel-phosphorus alloy anticorrosion coating is plated on the inner wall of the pipeline, and the thickness is 5μm; 80 kg of silicone rubber and 8 kg of graphite powder are kneaded at 110℃ for 12 minutes, and then kneaded for 5 minutes after adding the foaming agent to prepare the base glue; the base glue is foamed into a honeycomb porous base by heating and pressurizing at 160℃ and 8MPa for 15 minutes, and then embedded into the steel ring; the gallium-indium-tin alloy liquid metal cooling medium is filled into the cooling pipeline by vacuum infusion process, and the inlet and outlet of the pipeline are sealed; the prepared tread rubber, buffer layer blank and base support layer are combined and formed on the forming machine, and then placed in the curing machine for vulcanization at 180℃ and 12MPa for 70 minutes; the tire is applied to a 50-ton loader in an open-pit mine, and continuously operates for 8 months under the working condition of gravel road surface at an ambient temperature of 30-140℃, without problems such as serious wear of the tread, aging and cracking of the rubber, etc., compared with the traditional tire, the service life is prolonged by 2 times, and the downtime of the equipment due to tire failure is reduced by 80%.

[0051] Example 2:

[0052] A high-temperature-resistant solid tire applied to engineering machinery, three-section composite structure, tire specification 18.00-25, suitable for 20-ton asphalt paver.

[0053] Tread layer: thickness 45mm, surface adopts pattern design combining transverse grooves and inclined fine grooves, transverse groove depth 28mm, inclined fine groove width 3mm, depth 15mm, which helps to prevent asphalt adhesion; the tread rubber is mainly fluorine rubber, and the raw material ratio is adjusted by adding 28% nano alumina powder, 6% benzimidazole antioxidant, 2.2% vulcanizing agent, 1.8% accelerator and 2.5% plasticizer to enhance adhesion resistance and wear resistance.

[0054] Buffer layer: thickness 18mm, composed of 4 layers of aramid fiber cord and hydrogenated nitrile rubber, cord immersion hydrogenated nitrile rubber ratio 72%, solvent ratio 23%, adhesive ratio 5%, focusing on lightweight and balanced buffer effect.

[0055] Base support layer: high-strength steel ring outer diameter 559 mm, heat dissipation groove width 4.5 mm, depth 7 mm, cooling pipe inner diameter 4 mm; external honeycomb porous base glue thickness 13 mm, internal air hole diameter 0.6 mm-0.9 mm, graphite powder addition increased to 12%, enhanced heat conduction performance.

[0056] A preparation method of a high-temperature-resistant solid tire applied to an engineering machine, further comprising the following steps:

[0057] Step one: tread rubber preparation: 80 kg of fluorine rubber is put into a mixer, plasticized at 105 DEG C for 12 minutes; 22.4 kg of nano aluminum oxide powder, 4.8 kg of benzimidazole antioxidant, 1.76 kg of vulcanizing agent, 1.44 kg of accelerator and 2 kg of plasticizer are added in turn, and mixed at 125 DEG C for 18 minutes; after 6 times of thin passing of the open mill, the sheet is taken out, and then a 0.3 mm thick anti-sticking coating is sprayed on the surface, which is made of a mixture of silicone and polytetrafluoroethylene;

[0058] Step two: buffer layer preparation: 40 kg of hydrogenated nitrile rubber is plasticized at 62 DEG C roller temperature for 9 minutes; aramid fiber cord is immersed in a glue solution composed of 28.8 kg of hydrogenated nitrile rubber, 9.2 kg of solvent and 2 kg of adhesive for 4 minutes, and 4 layers of cord are attached according to the design requirements to form a buffer layer blank;

[0059] Step three: base support layer preparation: after the alloy steel is machined into a steel ring, the cooling pipe is laser cladded and plated with a 8 μm thick titanium alloy corrosion-resistant coating; 60 kg of silicone rubber and 7.2 kg of graphite powder are kneaded at 115 DEG C for 13 minutes, and then kneaded for another 6 minutes after adding a foaming agent to obtain a base rubber; the honeycomb porous base glue is formed by heating and pressurizing foaming at 165 DEG C and 9 MPa pressure for 16 minutes, and then embedded into the steel ring; the cooling medium of gallium-indium-tin alloy liquid metal is vacuum filled and sealed into the pipe;

[0060] Step four: tire molding and vulcanization: after the components are combined on the molding machine, vulcanization is carried out at 185 DEG C and 13 MPa pressure for 75 minutes.

[0061] Specific steps are: 80 kg of fluorine rubber is put into the internal mixer, plasticated at 105℃ for 12 minutes; 22.4 kg of nano-aluminum oxide powder, 4.8 kg of benzimidazole antioxidant, 1.76 kg of vulcanizing agent, 1.44 kg of accelerator and 2 kg of plasticizer are added in turn, mixed at 125℃ for 18 minutes; after 6 times of thin passage through the open mill, the sheet is taken out, then a 0.3 mm thick anti-sticking coating is sprayed on the surface, the anti-sticking coating is made of a mixture of silicone and polytetrafluoroethylene; 40 kg of hydrogenated nitrile rubber is plasticated at 62℃ roll temperature of the open mill for 9 minutes; the aramid fiber cord is immersed in a glue solution composed of 28.8 kg of hydrogenated nitrile rubber, 9.2 kg of solvent and 2 kg of adhesive for 4 minutes, and 4 layers of cord are attached according to the design requirements to make a buffer layer blank; the alloy steel is machined into a steel ring, then the laser cladding cooling pipeline is cooled and plated with a 8 μm thick titanium alloy anti-corrosion coating; 60 kg of silicone rubber and 7.2 kg of graphite powder are kneaded at 115℃ for 13 minutes, and then kneaded for another 6 minutes after adding the foaming agent to prepare the base rubber; the honeycomb porous base rubber is formed by heating and pressurizing at 165℃ and 9 MPa for 16 minutes, and then embedded into the steel ring; the gallium-indium-tin alloy liquid metal cooling medium is vacuum filled and the pipeline is sealed; after the components are combined, the tire is vulcanized at 185℃ and 13 MPa for 75 minutes, the tire is assembled on the asphalt paver for municipal road construction, and the tire continuously completes 20 kilometers of road paving operation under the working condition of asphalt paving temperature 80-150℃, the tire surface does not appear the phenomenon of skidding caused by asphalt adhesion, and the wear degree is reduced by 65% compared with ordinary tires; the cooling system effectively controls the internal temperature of the tire below 120℃, ensuring the continuous operation efficiency of the paver, and shortening the construction period by 15%.

[0062] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant solid tire used on engineering machinery, characterized by: The tire adopts a three-section composite structure, which includes a tread layer, a buffer layer and a base support layer from the outside to the inside.

2. The high-temperature resistant solid tire for use on engineering machinery according to claim 1, characterized in that: The tread layer is 50 mm thick, and the surface is provided with a deepened staggered block pattern with a depth of 30 mm, and arc-shaped guide grooves are provided on both sides of the tread.

3. The high-temperature resistant solid tire for use on engineering machinery according to claim 1, characterized in that: The buffer layer has a thickness of 20 mm and is composed of multiple layers of aramid fiber cords and high-temperature resistant rubber.

4. The high-temperature resistant solid tire for engineering machinery according to claim 1, characterized in that: The base support layer is embedded with a high-strength steel ring with spiral heat dissipation grooves on the surface. The heat dissipation grooves of the steel ring are 5mm wide and 8mm deep, and the outside is wrapped with a honeycomb porous base glue with a thickness of 15mm.

5. The high temperature resistant solid tire for use on engineering machinery according to claim 4, characterized in that: A closed-circulation cooling pipe is arranged inside the high-strength steel ring, and the pipe is filled with liquid metal cooling medium.

6. The high-temperature resistant solid tire for use on engineering machinery according to claim 1, characterized in that: The tread layer is made of tread rubber, which takes fluororubber as main material and is added with 30% nano-alumina powder, 5% benzimidazole antioxidant, and appropriate amounts of vulcanizer, accelerator and plasticizer.

7. The high temperature resistant solid tire for engineering machinery according to claim 1, characterized in that: The high-temperature resistant rubber of the buffer layer is hydrogenated nitrile butadiene rubber, and the aramid fiber cord is compounded with the rubber by being impregnated with a glue solution consisting of hydrogenated nitrile butadiene rubber, a solvent and an adhesive.

8. The high temperature resistant solid tire for use on engineering machinery according to claim 4, characterized in that: The base rubber is made of silicone rubber and forms a honeycomb porous structure through a foaming process. The internal pore diameter is 0.5mm-1mm, and 10% of graphite powder is added to the base rubber.

9. The high temperature resistant solid tire for engineering machinery according to claim 5, characterized in that: The high-strength steel ring is made of alloy steel, the processing accuracy of the heat dissipation groove is controlled at ±0.1mm, the cooling pipe is formed inside the steel ring by laser cladding, the inner diameter of the pipe is 3mm to 5mm, and the inner wall of the pipe is coated with an anti-corrosion coating.

10. A method for preparing a high-temperature resistant solid tire for use on engineering machinery, characterized by: The high-temperature resistant solid tire for use on engineering machinery according to any one of claims 1 to 9 further comprises the following steps: Step 1: Preparation of tread rubber: Plasticate the fluororubber in an internal mixer at 100°C for 10 minutes, add nano-alumina powder, benzimidazole antioxidant, vulcanizing agent, accelerator and plasticizer in sequence, mix at 120°C for 15 minutes, and then pass it through an open mixer for 5 times before sheeting. Step 2: Preparation of buffer layer: The hydrogenated nitrile rubber is plasticized on an open mill at a roller temperature of 60°C for 8 minutes, and the aramid fiber cord is impregnated with a glue solution consisting of hydrogenated nitrile rubber, solvent and adhesive for 3 minutes, and then laminated according to the design requirements to form a buffer layer blank; Step 3: Preparation of the base support layer: Alloy steel is machined to obtain a high-strength steel ring with spiral heat dissipation grooves on the surface; a closed-loop cooling pipe with an inner diameter of 3mm to 5mm is formed inside the steel ring using laser cladding technology, and the inner wall of the pipe is plated with an anti-corrosion coating; silicone rubber and graphite powder are kneaded at 110°C for 12 minutes, and a foaming agent is added and kneaded for another 5 minutes to obtain a base rubber compound, which is heated and pressurized at 160°C and 8MPa for 15 minutes to form a honeycomb porous base rubber, and the steel ring is embedded in it; liquid metal cooling medium is filled into the cooling pipe through a vacuum infusion process, and the pipe inlet and outlet are sealed; Step 4: Tire molding and vulcanization: The tread rubber, buffer layer blank and base support layer are combined and molded on a molding machine, and then placed in a vulcanizer for vulcanization at 180°C and 12MPa pressure for 60 to 90 minutes.