Heat insulation coating, joint and carbon ceramic brake device

Abstract

The utility model discloses a heat insulation coating, a joint and a carbon ceramic brake device. The heat insulation coating comprises a bottom layer bonding layer, a heat insulation main body layer and a top protection layer which are sequentially connected in a stacked mode, the bottom layer bonding layer is used for being connected with the joint, and the heat insulation main body layer comprises a porous structure prepared from a nanometer aerogel composite material. The heat insulation coating is arranged on the joint. The carbon ceramic brake device comprises the joint which is used for being fixed on a wheel. The heat insulation coating can be used on the joint, the heat dissipation effect of the joint can be improved, the service life of the joint and other parts is prolonged, and the safety and reliability of a whole braking system are improved.

Description

Technical Field

[0001] This application relates to the field of mechanical parts technology, and in particular to heat-insulating coatings, couplings, and carbon-ceramic braking devices. Background Technology

[0002] With the increasing demand for high-performance braking systems in the automotive, aerospace, and other fields, split-type carbon-ceramic brake discs are gradually gaining widespread application due to their superior performance, such as lightweight design, high heat resistance, and excellent braking performance. During braking, carbon-ceramic brake discs generate a significant amount of heat due to friction. While some of this heat is dissipated through ventilation, a considerable portion is transferred to the connected brake caps (also known as metal caps) via thermal radiation. Brake caps are typically made of metal, which has high thermal conductivity. If they absorb a large amount of heat radiation from the carbon-ceramic brake disc, their temperature will rise rapidly. Excessive temperature negatively impacts the material properties of the brake caps, such as reducing their strength and potentially causing thermal fatigue and shortening their lifespan under prolonged high-temperature conditions. Furthermore, excessively high brake cap temperatures can affect the normal operation of other connected components, such as affecting the lubrication of wheel bearings, increasing wear, and even causing malfunctions in other parts of the braking system, thus threatening the safety and reliability of the entire braking system.

[0003] Currently, traditional solutions to the problem of heat radiation from split carbon-ceramic brake discs to the brake caliper mainly focus on optimizing the ventilation structure of the carbon-ceramic brake disc and adding heat dissipation fins to improve the heat dissipation efficiency of the carbon-ceramic brake disc itself and reduce the generation and accumulation of heat. However, these methods in traditional technologies have limited effectiveness in suppressing heat that has already been generated and radiated to the brake caliper, and cannot fundamentally solve the problem of the brake caliper overheating due to heat radiation. Utility Model Content

[0004] Therefore, it is necessary to provide a heat-insulating coating that can effectively reduce the heat radiation from the carbon ceramic brake disc to the brake contacts, ensuring the stable operation and safety of the braking system.

[0005] One embodiment of this application provides a heat-insulating coating.

[0006] A heat-insulating coating includes a bottom adhesive layer, a heat-insulating body layer, and a top protective layer that are stacked sequentially. The bottom adhesive layer is used to connect with a connector, and the heat-insulating body layer includes a porous structure made of nano-aerogel composite material.

[0007] In some embodiments, the underlying adhesive layer comprises a silicone resin layer formed by curing a silicone resin adhesive.

[0008] In some embodiments, the thickness of the underlying adhesive layer is 50 μm to 100 μm.

[0009] In some embodiments, the thickness of the thermal insulation main layer is 2mm to 3mm.

[0010] In some embodiments, the heat insulation core layer contains high-temperature resistant ceramic particles.

[0011] In some embodiments, the high-temperature resistant ceramic particles include one or both of silicon carbide particles and metal oxide particles.

[0012] In some embodiments, the metal oxide particles include one or more of alumina particles and titanium dioxide.

[0013] In some embodiments, the top protective layer comprises a ceramic coating.

[0014] In some embodiments, the thickness of the top protective layer is 10 μm to 20 μm.

[0015] One embodiment of this application also provides a clasp.

[0016] A connector having the heat-insulating coating described in any of the above embodiments.

[0017] One embodiment of this application also provides a carbon ceramic braking device.

[0018] A carbon ceramic braking device includes a coupling as described in any of the above embodiments, the coupling being used for fixing to a wheel.

[0019] The aforementioned heat-insulating coating can be applied to the brake clutch to improve its heat dissipation, extend the service life of the brake clutch and other components, and enhance the safety and reliability of the entire braking system. Specifically, in this application, the bottom adhesive layer is used to connect with the brake clutch; the heat-insulating main layer includes a porous structure made of nano-aerogel composite material, meaning the porous structure is mainly composed of nano-aerogel composite material. The heat-insulating main layer has high porosity and extremely low thermal conductivity, effectively blocking the conduction of heat generated by the carbon ceramic brake disc to the brake clutch; in addition, the top protective layer effectively protects the entire heat-insulating coating, protecting the heat-insulating material of the middle heat-insulating main layer from external environmental erosion and mechanical damage, thus improving the service life of the heat-insulating coating.

[0020] In summary, this application has the following beneficial effects:

[0021] (1) Effectively reduce the temperature of the clutch: Through the design of nano-aerogel composite material and multi-layer coating structure, the heat radiation from the carbon ceramic brake disc to the clutch can be significantly reduced. According to experimental tests, under the same braking conditions, the surface temperature of the clutch using the heat insulation coating of this application can be reduced by 30%~50%, which effectively avoids the problem of performance degradation and shortened life of the clutch due to excessive temperature.

[0022] (2) Improve the reliability of the braking system: The reduction in the temperature of the clutch improves the working environment of other connected components, such as ensuring the lubrication performance of the wheel hub bearing, reducing the probability of wear and failure, thereby improving the reliability and safety of the entire braking system.

[0023] (3) Enhance the stability and durability of the heat insulation coating: The addition of high-temperature resistant ceramic particles enhances the mechanical strength of the heat insulation coating. The design of the top protective layer protects the main heat insulation layer, so that the heat insulation coating can maintain stable heat insulation performance under harsh environments such as long-term high temperature, vibration and impact, extending the service life of the heat insulation coating and reducing maintenance and replacement costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of a heat-insulating coating according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures

[0028] 10. Thermal insulation coating; 100. Underlying adhesive layer; 200. Thermal insulation main layer; 300. Top protective layer. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] In this document, "optionally," "optionally," and "optional" mean that something is optional, that is, it is selected from either "with" or "without." If multiple "options" appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "option" is independent. In this application, descriptions such as "optionally contains" and "optionally includes" indicate "contains or does not contain."

[0036] In this application, when numerical intervals (i.e., numerical ranges) are mentioned, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, etc.

[0037] This application provides a heat-insulating coating to solve at least one of the following technical problems of carbon-ceramic brake discs during braking in the conventional technology: (1) The carbon-ceramic brake disc generates a large amount of heat due to friction, part of which is transferred to the connected joint in the form of thermal radiation, causing the joint temperature to rise rapidly. The excessively high temperature will have a negative impact on the material properties of the joint and may also cause thermal fatigue, reducing the service life of the joint. (2) The excessively high temperature of the joint may affect the normal operation of other connected components, such as affecting the lubrication performance of the wheel hub bearing, increasing wear, and even causing other components of the braking system to malfunction, thereby threatening the safety and reliability of the entire braking system. (3) The conventional technology of optimizing the ventilation structure of the carbon-ceramic brake disc and adding heat dissipation fins has limited effect on suppressing the heat that has already been generated and radiated to the joint, and cannot fundamentally solve the problem of the joint temperature being too high due to thermal radiation. The heat-insulating coating will be described below with reference to the accompanying drawings.

[0038] The heat-insulating coating 10 provided in one embodiment of this application is exemplary; please refer to [link to relevant documentation]. Figure 1 As shown, Figure 1This is a schematic diagram of the structure of the heat-insulating coating 10 provided in one embodiment of this application. The heat-insulating coating 10 of this application can be used to prepare carbon-ceramic brake discs, improve the heat dissipation effect of carbon-ceramic brake discs, increase the service life of carbon-ceramic brake discs and their connected couplings and other components, and improve the safety and reliability of the entire braking system.

[0039] To more clearly illustrate the structure of the heat insulation coating 10, the heat insulation coating 10 will be described below in conjunction with the accompanying drawings.

[0040] For example, please refer to Figure 1 As shown, a heat-insulating coating 10 includes a bottom adhesive layer 100, a heat-insulating body layer 200, and a top protective layer 300, which are sequentially stacked together. The bottom adhesive layer 100 is used for connection with a connector. The heat-insulating body layer 200 includes a porous structure made of nano-aerogel composite material.

[0041] The aforementioned heat-insulating coating 10 can be applied to the brake clutch, improving its heat dissipation, extending the service life of the brake clutch and other components, and enhancing the safety and reliability of the entire braking system. Specifically, in this application, the bottom adhesive layer 100 is used to connect with the brake clutch; the heat-insulating main layer 200 includes a porous structure made of nano-aerogel composite material, meaning the porous structure is mainly composed of nano-aerogel composite material. The heat-insulating main layer 200 has high porosity and extremely low thermal conductivity, effectively blocking the heat generated by the carbon ceramic brake disc from being conducted to the brake clutch; in addition, the top protective layer 300 effectively protects the entire heat-insulating coating 10, protecting the heat-insulating material of the middle heat-insulating main layer 200 from external environmental erosion and mechanical damage, thus improving the service life of the heat-insulating coating 10.

[0042] In some embodiments, the underlying adhesive layer comprises a silicone resin layer formed by curing a silicone resin adhesive. The silicone resin adhesive is capable of forming a strong chemical bond with the metal material on the mating surface, ensuring a tight bond between the entire heat insulation coating 10 and the mating.

[0043] In some embodiments, the thickness of the bottom adhesive layer 100 is 50 μm to 100 μm. For example, the thickness of the bottom adhesive layer 100 may include, but is not limited to, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm or any range between the two mentioned above.

[0044] In some embodiments, the thickness of the thermal insulation main layer 200 is 2mm to 3mm. For example, the thickness of the thermal insulation main layer 200 includes, but is not limited to: 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or any range between the two mentioned above.

[0045] In some embodiments, the thermal insulation body layer 200 contains high-temperature resistant ceramic particles.

[0046] In some embodiments, the high-temperature resistant ceramic particles include one or both of silicon carbide particles and metal oxide particles. The addition of high-temperature resistant ceramic particles, such as silicon carbide (SiC) and alumina (Al2O3) particles, to the nano-aerogel composite material not only increases the mechanical strength of the heat insulation main layer 200, making it less prone to detachment when subjected to vibration and impact during braking, but also further improves the high-temperature resistance of the heat insulation coating 10. In addition, the heat insulation main layer 200 also contains a small amount of titanium dioxide (TiO2) particles. Titanium dioxide particles have good infrared reflectivity, which can reflect the infrared radiation emitted by the carbon ceramic brake disc, reducing heat transfer to the clutch.

[0047] In some embodiments, the metal oxide particles include one or more of alumina particles and titanium dioxide.

[0048] In some embodiments, the top protective layer 300 includes a ceramic coating. The ceramic coating serves a protective function. It exhibits good abrasion resistance and chemical stability, protecting the intermediate insulation material from environmental erosion and mechanical damage. Simultaneously, the smooth surface of the ceramic coating reduces the adhesion of dust and impurities.

[0049] In some embodiments, the thickness of the top protective layer 300 is 10 μm to 20 μm. For example, the thickness of the top protective layer 300 may include, but is not limited to, 10 μm, 12 μm, 13 μm, 15 μm, 17 μm, 18 μm, 20 μm or any range between the two aforementioned.

[0050] The preparation method of the above-mentioned heat-insulating coating 10 includes the following steps:

[0051] S10. Pre-treat the surface of the carbon ceramic brake disc by using sandpaper polishing and chemical cleaning to remove oil, rust and impurities from the surface of the carbon ceramic brake disc.

[0052] S20. Sandblast the carbon ceramic brake disc to increase the roughness of the mating surface and improve the adhesion of the coating.

[0053] S30. Prepare the bottom adhesive layer 100 by spraying. Spray the silicone resin adhesive evenly onto the surface of the carbon ceramic brake disc, with the thickness controlled at 50μm~100μm, and then cure it at 150℃~200℃ for 1~2h to form the bottom adhesive layer 100.

[0054] S40. The thermal insulation main layer 200 is prepared by thermal spraying. The nano-aerogel composite material is heated to a molten state and sprayed at high speed onto the surface of the bottom adhesive layer 100 through a spray gun to form a thermal insulation main layer 200 with a thickness of 2mm~3mm.

[0055] S50. The top protective layer 300 is prepared by physical vapor deposition. The ceramic material is evaporated and deposited on the surface of the heat insulation main layer 200 in a vacuum environment to form a top protective layer 300 with a thickness of 10μm~20μm.

[0056] One embodiment of this application also provides a clasp.

[0057] A connector having the heat-insulating coating 10 described in any of the above embodiments.

[0058] One embodiment of this application also provides a carbon ceramic braking device.

[0059] A carbon ceramic braking device includes a coupling as described in any of the above embodiments, the coupling being used for fixing to a wheel.

[0060] In summary, this application has the following beneficial effects:

[0061] (1) Effectively reduce the temperature of the clutch: Through the design of nano-aerogel composite material and multi-layer coating structure, the heat radiation from the carbon ceramic brake disc to the clutch can be significantly reduced. According to experimental tests, under the same braking conditions, the surface temperature of the clutch using the heat insulation coating 10 of this application can be reduced by 30%~50%, which effectively avoids the problem of performance degradation and shortened life of the clutch due to excessive temperature.

[0062] (2) Improve the reliability of the braking system: The reduction in the temperature of the clutch improves the working environment of other connected components, such as ensuring the lubrication performance of the wheel hub bearing, reducing the probability of wear and failure, thereby improving the reliability and safety of the entire braking system.

[0063] (3) Enhance the stability and durability of the heat insulation coating 10: The addition of high-temperature resistant ceramic particles enhances the mechanical strength of the heat insulation coating 10. The design of the top protective layer 300 protects the heat insulation main layer 200, so that the heat insulation coating 10 can maintain stable heat insulation performance under harsh environments such as long-term high temperature, vibration and impact, extend the service life of the heat insulation coating 10 and reduce maintenance and replacement costs.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A thermal barrier coating characterized by, The heat insulation coating comprises a bottom adhesive layer, a heat insulation main layer and a top protective layer which are connected in sequence, the bottom adhesive layer is used for connecting with the joint, and the heat insulation main layer comprises a porous structure prepared from a nano aerogel composite material.

2. The thermal barrier coating of claim 1, wherein, The bottom adhesive layer comprises a silicone resin layer formed by curing of a silicone resin adhesive.

3. The thermal barrier coating of claim 1, wherein, The thickness of the bottom adhesive layer is 50-100 μm.

4. The thermal barrier coating of claim 1, wherein, The thickness of the heat insulation main layer is 2-3 mm.

5. The thermal barrier coating of claim 1, wherein, The heat insulation main layer has high-temperature-resistant ceramic particles.

6. The thermal barrier coating of claim 5, wherein, The high-temperature-resistant ceramic particles comprise one or both of silicon carbide particles and metal oxide particles. Optionally, the metal oxide particles comprise one or more of alumina particles and titanium dioxide.

7. The thermal barrier coating according to any one of claims 1 to 6, characterized in that The top protective layer comprises a ceramic coating.

8. The thermal barrier coating according to any one of claims 1 to 6, characterized in that The thickness of the top protective layer is 10-20 μm.

9. A joint, characterized in that The joint has the heat insulation coating according to any one of claims 1-8.

10. A carbon-carbide brake device, characterized by, The joint according to claim 9 is used for fixing on a wheel.

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