High temperature resistant rubber hose for automobile turbocharger

Abstract

The application discloses a high-temperature-resistant rubber hose for an automobile turbocharger, which comprises, from inside to outside, an inner liner layer made of polytetrafluoroethylene, a first heat insulation layer coated with aerogel material, an inner rubber layer made of fluororubber, a reinforcing layer made of a steel wire winding layer, a second heat insulation layer made of aluminum silicate fiber paper, an outer rubber layer made of silicone rubber, and an outer cover layer made of polyurethane. The high-temperature-resistant rubber hose for the automobile turbocharger has excellent high-temperature resistance and can adapt to high temperatures of over 300 DEG C and even up to 500 DEG C in special working conditions, thereby avoiding aging and cracking. The reinforcing layer is composed of two layers of stainless steel wire winding layers with opposite directions and an aluminum foil barrier layer, the thickness is reasonable, the steel wire winding enhances the strength and the compression resistance, the aluminum foil barrier layer assists heat insulation and improves the structural integrity, and the hot winding and pressing edge treatment improves the stability; and the overall structure and material selection guarantee the sealing performance of the hose under high temperatures and complex mechanical environments.

Description

Technical Field

[0001] This utility model relates to the field of rubber hose technology, specifically to a high-temperature resistant rubber hose for automotive turbochargers. Background Technology

[0002] As a key component for improving the performance of modern car engines, the turbocharger uses the exhaust gas from the engine to drive the turbine to rotate, thereby increasing the intake air volume and density of the engine. This allows more air to enter the cylinder and participate in combustion, significantly improving the engine's power and efficiency. This results in a qualitative leap in both power output and fuel economy. Under the current trend of pursuing high performance and low emissions in the automotive industry, turbocharging technology has been widely used and rapidly promoted.

[0003] However, while turbochargers work efficiently, they also bring a serious challenge – high temperature. When a turbocharger is working, the exhaust turbine end will be subjected to the high temperature exhaust gas discharged from the engine. The temperature of this exhaust gas is extremely high, which makes the working temperature of the pipes connecting the various components of the turbocharger reach more than 300°C. Moreover, under certain special operating conditions, such as rapid engine acceleration or long-term high-load operation, the instantaneous temperature can even reach 500°C. Such extreme high-temperature environments place extremely stringent requirements on the heat resistance of rubber hoses connected to turbochargers. Meanwhile, in recent years, the state has successively introduced national standards such as GB / T7528-2025 "Terminology for Rubber and Plastic Hoses and Hose Assemblies", GB / T 4498.1-2025 "Determination of Ash Content in Rubber - Part 1: Muffle Furnace Method", GB / T 43751-2024 "Guidelines for the Application of Statistics in Physical Testing of Rubber and Rubber Products", and GB / T 18950-2023 "Laboratory Light Source Exposure Test Method for Rubber and Plastic Hoses - Determination of Changes in Color, Appearance and Other Physical Properties" to regulate the quality of rubber hoses.

[0004] Currently, most common rubber hoses on the market are designed with materials and structures based on conventional working temperatures and environmental conditions. When faced with the high temperatures generated by automotive turbochargers, they often show significant shortcomings. Ordinary rubber hoses are prone to aging, hardening, and cracking at high temperatures, leading to decreased sealing performance and even safety issues such as leakage. This seriously affects the normal operation and service life of automotive turbochargers. Existing ordinary rubber hoses cannot meet the requirements of the high-temperature working environment of automotive turbochargers.

[0005] Therefore, developing a rubber hose that can adapt to such extreme conditions and possesses good high-temperature resistance, thermal insulation, and mechanical properties is of great practical significance for ensuring the normal operation of automotive turbochargers and improving the overall performance and reliability of automobiles. Summary of the Invention

[0006] To address the aforementioned problems, this utility model provides a high-temperature resistant rubber hose for automotive turbochargers. This hose features an inner lining of polytetrafluoroethylene (PTFE), an outer rubber layer of silicone rubber, and an outer covering of polyurethane, along with two insulation layers, resulting in excellent high-temperature resistance. It can withstand temperatures exceeding 300°C during turbocharger operation and instantaneously reaching 500°C under special conditions, preventing aging and cracking. The reinforcing layer consists of two layers of stainless steel wire winding in opposite directions and an aluminum foil barrier layer. The thickness is reasonable; the wire winding enhances strength and compressive strength, while the aluminum foil barrier layer provides insulation and improves overall structural integrity. Heat-wrapping and edge pressing further enhances stability. The overall structure and material selection ensure the hose's sealing performance under high temperatures and complex mechanical environments, guaranteeing the normal operation of the turbocharger, improving vehicle performance and reliability, and extending service life.

[0007] The technical solution of this utility model is as follows: A high-temperature resistant rubber hose for an automotive turbocharger includes, from the inside out, an inner liner made of polytetrafluoroethylene, a first heat insulation layer made of aerogel material coating, an inner rubber layer made of fluororubber, a reinforcing layer made of steel wire winding, a second heat insulation layer made of aluminum silicate fiber paper, an outer rubber layer made of silicone rubber, and an outer coating layer made of polyurethane.

[0008] The thicknesses of the inner lining, the first insulation layer, the inner adhesive layer, the reinforcing layer, the second insulation layer, the outer adhesive layer, and the outer covering layer are 0.3-0.5 mm, 0.4-0.6 mm, 1.0-1.5 mm, 0.63-1.08 mm, 0.5-0.8 mm, 1.2-1.8 mm, and 0.2-0.4 mm, respectively.

[0009] The reinforcing layer comprises a first wire winding layer, an aluminum foil barrier layer, and a second wire winding layer, which are stacked sequentially from the inside out.

[0010] The thickness of the first and second wire winding layers is 0.3-0.5 mm.

[0011] The first and second wire winding layers are wound in opposite directions.

[0012] The thickness of the aluminum foil barrier layer is 0.03-0.08 mm.

[0013] The aluminum foil barrier layer is treated by hot wrapping, and the adhesive edges are pressed together to form a pressing edge.

[0014] The blank holder width is 10±2mm.

[0015] The first and second wire winding layers are made of stainless steel wire.

[0016] The diameter of the stainless steel wire is 0.2mm.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model discloses a high-temperature resistant rubber hose for automotive turbochargers. This high-temperature resistant rubber hose for automotive turbochargers has excellent high-temperature resistance. The inner lining layer is made of polytetrafluoroethylene, the outer rubber layer is made of silicone rubber, and the outer covering layer is made of polyurethane. These materials have good high-temperature resistance characteristics and can maintain stable performance in high-temperature environments. This allows the hose to adapt to high-temperature environments where the pipeline temperature can reach over 300°C during the operation of automotive turbochargers, and even instantaneous temperatures can reach 500°C under special operating conditions. This avoids problems such as aging, hardening, and cracking that occur under high temperatures like ordinary rubber hoses, ensuring the normal operation of the hose.

[0018] 2. This utility model discloses a high-temperature resistant rubber hose for automotive turbochargers. The high-temperature resistant rubber hose for automotive turbochargers has good heat insulation effect. It is provided with a first heat insulation layer made of aerogel material coating and a second heat insulation layer made of aluminum silicate fiber paper, which can effectively block heat transfer, reduce the impact of high temperature on other layers of the hose and connecting parts, further protect the hose and related components of the turbocharger, and improve the overall stability and reliability of the system.

[0019] 3. This utility model discloses a high-temperature resistant rubber hose for automotive turbochargers. This high-temperature resistant rubber hose for automotive turbochargers has enhanced mechanical properties. The reinforcing layer adopts a structure consisting of a first steel wire winding layer, an aluminum foil barrier layer, and a second steel wire winding layer stacked sequentially. The steel wire winding layer uses stainless steel wire, and the thickness of the first and second steel wire winding layers is reasonable, with opposite winding directions, which effectively enhances the hose's strength and pressure resistance, enabling the hose to withstand the pressure and vibration generated during turbocharger operation and ensuring the hose's mechanical stability under complex working conditions. The aluminum foil barrier layer not only assists in heat insulation but also enhances the overall structural integrity. It is treated with a heat-wrapping method, with the bonded edges forming a pressed edge. The pressed edge width is reasonable, further improving the structural stability and reliability.

[0020] 4. This utility model discloses a high-temperature resistant rubber hose for automotive turbochargers. The high-temperature resistant rubber hose for automotive turbochargers has reliable sealing performance. The overall structural design and material selection enable the hose to maintain good sealing performance in high-temperature and complex mechanical environments, avoiding problems such as decreased sealing performance and leakage caused by hose aging and cracking. This ensures the normal operation of automotive turbochargers, improves the overall performance and reliability of automobiles, and extends the service life of turbochargers and related systems. Attached Figure Description

[0021] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the cross-sectional structure of a high-temperature resistant rubber hose for an automotive turbocharger according to an embodiment of the present invention. The components represented by the various reference numerals in the diagram are: This utility model comprises: 100, inner lining layer; 200, first heat insulation layer; 300, inner adhesive layer; 400, reinforcing layer; 410, first steel wire winding layer; 420, aluminum foil barrier layer; 430, second steel wire winding layer; 500, second heat insulation layer; 600, outer adhesive layer; and 700, outer covering layer. Detailed Implementation

[0023] like Figure 1 As shown, the high-temperature resistant rubber hose for automotive turbochargers is provided with, from the inside out, an inner liner 100, a first heat insulation layer 200, an inner rubber layer 300, a reinforcing layer 400, a second heat insulation layer 500, an outer rubber layer 600, and an outer covering layer 700, stacked sequentially.

[0024] The inner lining 100 is made of polytetrafluoroethylene (PTFE) with a thickness of 0.3-0.5 mm. PTFE has excellent high-temperature resistance and can maintain stable physical and chemical properties at high temperatures, making it less prone to deformation and decomposition. At the same time, it has an extremely low coefficient of friction, which can reduce the frictional resistance between the high-temperature and high-pressure medium and the pipe wall when the medium flows in the hose, ensuring smooth flow of the medium. In addition, its good corrosion resistance can resist the erosion of the inner wall of the hose by corrosive substances that may be contained in the medium.

[0025] The first insulation layer 200 is made of aerogel material with a thickness of 0.4-0.6 mm. Aerogel material has an extremely low thermal conductivity and is a highly efficient insulation material. When a high-temperature and high-pressure medium enters the hose, the first insulation layer 200 can effectively block the heat transfer to the inner rubber layer 300, reduce the temperature of the inner rubber layer 300, and thus protect the inner rubber layer 300 and other internal structures from excessive high temperature, maintaining the overall performance stability of the hose. Aerogel material is mainly prepared by nano-sized silica particles through sol-gel method and supercritical drying technology. It has an extremely low density (usually in the range of 0.003-0.3 g / cm³) and an extremely high porosity (up to 99.8% or more). The tiny and interconnected pore structure gives the aerogel material an extremely low thermal conductivity (as low as 0.012 W / (m·K) or even lower), making it an excellent insulation material.

[0026] The inner rubber layer 300 is made of fluororubber with a thickness of 1.0-1.5mm. Fluororubber has excellent high temperature resistance and can maintain elasticity and sealing performance in high temperature environments. At the same time, it has good oil and chemical corrosion resistance, which can prevent oil and other chemical components contained in the high temperature and high pressure medium flowing in the hose from corroding the inside of the hose, ensuring the integrity and sealing of the inner layer of the hose, and ensuring the stable transmission of the medium in the hose.

[0027] The reinforcing layer 400 includes a first wire winding layer 410, an aluminum foil barrier layer 420, and a second wire winding layer 430, which are stacked sequentially from the inside to the outside, with a thickness of 0.63-1.08 mm.

[0028] The first wire winding layer 410 is made of stainless steel wire with a diameter of 0.2 mm and a thickness of 0.3-0.5 mm. The stainless steel wire has high strength and toughness. By winding it around the inner rubber layer 300, it can withstand the internal pressure and external tension of the hose during operation, enhance the overall pressure and tensile strength of the hose, and prevent the hose from deforming or breaking due to pressure and tension.

[0029] The aluminum foil barrier layer 420 has a thickness of 0.03-0.08mm and is treated by hot wrapping. The bonding edge forms a pressing edge with a width of 10±2mm. The aluminum foil has good conductivity and chemical stability. The aluminum foil barrier layer 420 is set between the first steel wire winding layer 410 and the second steel wire winding layer 430. This can effectively prevent electrochemical corrosion between the two steel wire winding layers due to possible potential differences, ensure the structural stability and durability of the reinforcing layer 400, and extend the service life of the hose.

[0030] The second wire winding layer 430 is also made of stainless steel wire with a diameter of 0.2 mm and a thickness of 0.3-0.5 mm. The winding direction is opposite to that of the first wire winding layer 410. Like the first wire winding layer 410, the second wire winding layer 430 also enhances the hose's pressure and tensile strength. The opposite winding direction to the first wire winding layer 410 allows the two wire winding layers to restrain each other, forming a more stable structure. This further improves the hose's ability to withstand complex stresses and ensures that the hose maintains a stable shape and performance under various working conditions.

[0031] The second heat insulation layer 500 is made of aluminum silicate fiber paper with a thickness of 0.5-0.8mm. The aluminum silicate fiber paper has good heat insulation properties and can further block the transfer of external heat to the inside of the hose. During the operation of the automotive turbocharger, the external environment may be at a high temperature. The second heat insulation layer 500 can effectively reduce the impact of this heat on the internal structure of the hose, maintain the temperature stability of the environment of internal components such as the inner rubber layer 300 and the reinforcing layer 400, and ensure that the overall performance of the hose is not affected by excessive external high temperature.

[0032] The outer rubber layer 600 is made of silicone rubber with a thickness of 1.2-1.8mm. Silicone rubber has excellent elasticity and high temperature resistance, forming a protective layer on the outermost layer of the hose. When the hose is subjected to external pressure, impact, or other forces, it can buffer and disperse these forces through its own elastic deformation, protecting the internal structure from damage. At the same time, its high temperature resistance can also adapt to the high-temperature environment generated when the automotive turbocharger is working, ensuring that the outer rubber layer 600 itself will not age or crack due to high temperatures, thus continuously playing a protective role.

[0033] The outer cladding 700 is made of polyurethane with a thickness of 0.2-0.4mm. Polyurethane material has good wear resistance and weather resistance. As the outermost protective layer of the hose, the outer cladding 700 can prevent the hose from being damaged by friction with surrounding objects during installation and use. At the same time, it can also resist the corrosion of the hose by factors such as ultraviolet rays, rain, and dust in the external environment, further improving the durability and reliability of the hose and extending its service life.

[0034] The manufacturing process of high-temperature resistant rubber hoses for automotive turbochargers is as follows: Polytetrafluoroethylene (PTFE) material is extruded to form a tubular inner liner of a specified thickness (0.3-0.5 mm). Aerogel material is uniformly coated onto the outer surface of the inner liner 100 using a coating device to form a first heat insulation layer 200 with a thickness of 0.4-0.6 mm. Fluororubber material is vulcanized over the first heat insulation layer 200 to form an inner rubber layer 300 with a thickness of 1.0-1.5 mm. Stainless steel wire (0.2 mm in diameter) is wound around the inner rubber layer 300 according to a set winding direction and parameters to form a first wire winding layer 410 with a thickness of 0.3-0.5 mm. Aluminum foil material is heat-wrapped and uniformly laid over the first wire winding layer 410, with the adhesive edges forming a pressing edge with a width of 10±2 mm. The thickness of the partition layer 420 is controlled at 0.03-0.08 mm; using stainless steel wire of the same diameter (0.2 mm) as the first steel wire winding layer 410, a second steel wire winding layer 430 with a thickness of 0.3-0.5 mm is formed by winding it around the aluminum foil barrier layer 420 in the opposite winding direction to the first steel wire winding layer 410; aluminum silicate fiber paper is wrapped around the reinforcing layer 400 to form a second heat insulation layer 500 with a thickness of 0.5-0.8 mm; silicone rubber material is wrapped around the second heat insulation layer 500 through a vulcanization process to form an outer rubber layer 600 with a thickness of 1.2-1.8 mm; polyurethane material is wrapped around the outer rubber layer 600 to form an outer covering layer 700 with a thickness of 0.2-0.4 mm, and finally a high-temperature resistant rubber hose for automotive turbochargers is made.

[0035] This automotive turbocharger's high-temperature resistant rubber hose features a polytetrafluoroethylene (PTFE) inner lining, a silicone rubber outer layer, and a polyurethane outer covering, along with two insulation layers, resulting in excellent high-temperature resistance. It can withstand temperatures exceeding 300°C during turbocharger operation and instantaneously reaching 500°C under special conditions, preventing aging and cracking. The reinforcing layer consists of two layers of stainless steel wire winding in opposite directions and an aluminum foil barrier layer. The thickness is reasonable; the wire winding enhances strength and compressive resistance, while the aluminum foil barrier layer provides insulation and improves overall structural integrity. Heat-wrapping and edge pressing further enhances stability. The overall structure and material selection ensure the hose's sealing performance under high temperatures and complex mechanical environments, guaranteeing the normal operation of the turbocharger, improving vehicle performance and reliability, and extending service life.

Claims

1. A high-temperature resistant rubber hose for automotive turbochargers, characterized in that, It includes, from the inside out, an inner liner (100) made of polytetrafluoroethylene, a first heat insulation layer (200) made of aerogel material coating, an inner rubber layer (300) made of fluororubber, a reinforcing layer (400) made of steel wire winding, a second heat insulation layer (500) made of aluminum silicate fiber paper, an outer rubber layer (600) made of silicone rubber, and an outer coating layer (700) made of polyurethane.

2. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 1, characterized in that, The thicknesses of the inner lining (100), the first heat insulation layer (200), the inner adhesive layer (300), the reinforcing layer (400), the second heat insulation layer (500), the outer adhesive layer (600), and the outer covering layer (700) are 0.3-0.5 mm, 0.4-0.6 mm, 1.0-1.5 mm, 0.63-1.08 mm, 0.5-0.8 mm, 1.2-1.8 mm, and 0.2-0.4 mm, respectively.

3. A high-temperature resistant rubber hose for an automotive turbocharger according to claim 1 or 2, characterized in that, The reinforcing layer (400) includes a first wire winding layer (410), an aluminum foil barrier layer (420), and a second wire winding layer (430) stacked sequentially from the inside to the outside.

4. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 3, characterized in that, The thickness of the first wire winding layer (410) and the second wire winding layer (430) is 0.3-0.5 mm.

5. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 3, characterized in that, The first wire winding layer (410) and the second wire winding layer (430) are wound in opposite directions.

6. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 3, characterized in that, The thickness of the aluminum foil barrier layer (420) is 0.03-0.08 mm.

7. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 6, characterized in that, The aluminum foil barrier layer (420) is treated by hot wrapping, and the adhesive edges are pressed together to form a pressing edge.

8. The high-temperature resistant rubber hose for an automotive turbocharger according to claim 7, characterized in that, The blank holder width is 10±2mm.

9. A high-temperature resistant rubber hose for an automotive turbocharger according to claim 3, characterized in that, The first wire winding layer (410) and the second wire winding layer (430) are made of stainless steel wire.

10. A high-temperature resistant rubber hose for an automotive turbocharger according to claim 9, characterized in that, The diameter of the stainless steel wire is 0.2 mm.

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