Brake disc, brake system and vehicle

Abstract

The utility model discloses a brake disc, a brake system and a vehicle, the brake disc comprises a disc body and heat dissipation assemblies, the heat dissipation assemblies extend in the radial direction of the disc body, the first ends of the heat dissipation assemblies are arranged in the disc body, the second ends of the heat dissipation assemblies extend out of the disc body, the number of the heat dissipation assemblies is multiple, and the heat dissipation assemblies are arranged in the disc body. The multiple heat dissipation assemblies are distributed in the circumferential direction of the disc body and suitable for conducting heat inside the disc body to the outside of the disc body. Therefore, heat in the brake disc can be transferred to the outside for heat dissipation, and the heat dissipation capacity of the brake disc is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a brake disc, a brake system and a vehicle. Background Art

[0002] When the vehicle brakes frequently or with high intensity, the current disc brake system will generate a lot of friction heat, which directly causes the friction pad and brake disc to generate high temperature and reduce the braking effect. The heat can be transferred to the brake oil through the piston connected to the friction pad. Long-term high-temperature operation can cause carbonization nodules of the brake oil and lead to brake failure. Frequent or long-term high-temperature conditions will also reduce the reliability and service life of the friction pad and brake disc.

[0003] Therefore, how to enhance the heat dissipation of the brake disc and increase the service life of the brake disc has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a brake disc with a heat dissipation component, which can transfer the heat inside the brake disc to the outside for heat dissipation.

[0005] A first aspect of the present application provides a brake disc, comprising a disc body and a heat dissipation assembly, wherein the heat dissipation assembly extends radially along the disc body, wherein a first end of the heat dissipation assembly is disposed inside the disc body, and a second end of the heat dissipation assembly extends outside the disc body, wherein there are multiple heat dissipation assemblies, which are distributed circumferentially along the disc body, and wherein the heat dissipation assembly is suitable for conducting heat inside the disc body to outside the disc body.

[0006] In a possible implementation, each heat dissipation assembly includes a first heat dissipation segment, a second heat dissipation segment, and a third heat dissipation segment;

[0007] The first end of the first heat dissipation section is arranged on the disk body, and the second end of the first heat dissipation section is connected to the second heat dissipation section;

[0008] The first end of the second heat dissipation segment is connected to the first end of the first heat dissipation segment, and the second end of the second heat dissipation segment is connected to the third heat dissipation segment;

[0009] A first end of the third heat dissipation segment is connected to the second heat dissipation segment, and a second end of the third heat dissipation segment extends outside the disk body.

[0010] In a possible implementation manner, it is characterized in that each of the heat dissipation components further includes fins.

[0011] In a possible implementation, there are multiple fins, and the multiple fins are distributed along the circumference of the disk body. Each fin is connected to each third heat dissipation segment respectively, and each fin corresponds to each heat dissipation component one by one.

[0012] In a possible implementation manner, the fins are multi-layer fins, and the multi-layer fins are arranged at intervals in the third heat dissipation section.

[0013] In a possible implementation manner, the fin is an annular fin, and the annular fin is connected to a plurality of third heat dissipation sections.

[0014] In a possible implementation, a liquid wick is disposed on the inner wall of the cavity of each heat dissipation component, and the liquid wick is suitable for transporting the liquid at the second end of the heat dissipation component to the first end of the heat dissipation component.

[0015] In a possible implementation manner, the liquid-absorbing core is a capillary structure.

[0016] In a possible implementation manner, the brake disc includes a groove and an outer disc, the first end of the heat dissipation component faces the inner wall of the groove, and the second end of the heat dissipation component extends out of the outer disc.

[0017] In a possible implementation manner, each heat dissipation component is bent along the circumference of the disk body.

[0018] A second aspect of the present application discloses a braking system, comprising any brake disc of the first aspect.

[0019] A third aspect of the present application provides a vehicle, comprising any brake disc described in the first aspect and / or the brake system of the second aspect.

[0020] The brake disc, brake system and vehicle provided by the present application are provided with a heat dissipation component on the brake disc, the first end of the heat dissipation component is outside the brake disc, the second end extends out of the brake disc, and a fin is provided on the second end, thereby achieving the heat dissipation of the temperature inside the brake disc to the outside. As a result, the heat inside the brake disc is dissipated through the heat dissipation component, ensuring the heat dissipation effect of the brake disc, effectively improving the braking capacity of the whole vehicle, and improving the reliability and service life of the brake disc.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of a brake disc disclosed in an embodiment of the present application;

[0024] Figure 2 It is a structural schematic diagram of a brake disc disclosed in an embodiment of the present application;

[0025] Figure 3It is a schematic diagram of the structure of a liquid absorbent core disclosed in an embodiment of the present application.

[0026] Figure numerals: 1-brake disc; 2-heat dissipation assembly; 3-first heat dissipation section; 4-second heat dissipation section; 5-third heat dissipation section; 51-fin; 6-liquid absorption core; 7-groove; 8-outer disc. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or ends.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Brake disc, also known as brake disc, is the friction partner of disc brake. Brake disc is a key component in vehicle braking system, usually made of cast iron or carbon composite. Its main function is to rotate with the wheels when the vehicle is driving. When the driver steps on the brake, the brake disc generates friction under the action of the brake caliper to help the vehicle slow down or stop. Therefore, the brake disc needs to have high and stable friction coefficient, good heat dissipation and heat capacity.

[0031] The passenger car brake system generates a large amount of friction heat during the braking process, and the brake disc heat dissipation design is crucial to the stability of braking performance. The existing brake disc heat dissipation method is usually air cooling. However, with the demand for power in passenger cars, such as high-performance coupes, sports cars or street racing cars, the friction heat damage caused by continuous high-intensity extreme braking conditions is becoming more and more serious. Due to the poor thermal properties of air, such as low specific heat capacity, low thermal conductivity and limited convection heat transfer coefficient, the convection heat dissipation performance of air cooling is limited for a large amount of brake friction heat damage, and it is difficult to significantly improve it.

[0032] In view of the above technical problems, the brake disc, brake system and vehicle provided by the present application are provided with a heat dissipation component on the brake disc, the first end of the heat dissipation component is outside the brake disc, the second end extends out of the brake disc, and a fin is provided on the second end, thereby realizing the transfer of the temperature inside the brake disc to the outside for heat dissipation. A liquid wick is provided in the heat dissipation component in the present application. When the temperature at the first end of the heat dissipation component inside the brake disc is too high, the liquid near the first end of the heat dissipation component of the liquid wick vaporizes and moves toward the second end of the heat dissipation component. After heat dissipation at the second end, it is reliquefied and returns to the first end of the heat dissipation component through the liquid wick for cooling, and the cycle continues. As a result, the heat inside the brake disc is dissipated through the heat dissipation component, which ensures the heat dissipation effect of the brake disc and effectively improves the braking capacity of the whole vehicle. At the same time, the heat dissipation component is provided with a liquid wick, which can cool the brake disc with the condensed liquid while dissipating heat, further improving the heat dissipation capacity of the brake disc and improving the reliability and service life of the brake disc.

[0033] The brake disc provided by the present application is described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-Figure 3 , Figure 1 is a schematic cross-sectional structure diagram of a brake disc disclosed in the present application, Figure 2 is a schematic diagram of the structure of a brake disc 1 disclosed in the present application, Figure 3 It is a schematic structural diagram of a liquid absorbent core 6 disclosed in the present application.

[0035] like Figure 1-Figure 2 As shown, the brake disc shown in the present application includes: a disc body 1 and a heat dissipation assembly 2, wherein the first end of the heat dissipation assembly 2 is arranged inside the disc body 1, and the second end is arranged outside the disc body 1, and the entire heat dissipation assembly 2 extends radially along the disc body 1. The heat dissipation assembly 2 can conduct the heat inside the disc body 1 to the outside of the disc body 1 for heat dissipation, thereby reducing the temperature of the brake disc during braking.

[0036] Specifically, there are multiple heat dissipation components 2, and the multiple heat dissipation components 2 are distributed along the circumference of the disk body 1. The heat dissipation components 2 are distributed in the circumference of the disk body 1, and each heat dissipation component 2 can be distributed in an interval or in a contact distribution. More specifically, the number of heat dissipation components 2 can be an even number or an odd number, and the spacing between each heat dissipation component 2 can be flexibly adjusted in the circumferential distribution according to the different heat dissipation components 2, which can be either equal spacing or differential spacing. It can be flexibly selected according to the different heat dissipation requirements of different vehicle models. The number of heat dissipation components 2 and the circumferential spacing distribution cannot constitute a limitation on the present application, and any scheme that does not pay the results of creative labor should be regarded as an equivalent scheme of the present application.

[0037] For example, there can be 8 heat dissipation components 2, and the 8 heat dissipation components 2 can be distributed along the circumference of the disk body 1 at intervals of 45° from each other. The 8 heat dissipation components 2 can also be in contact with each other in pairs, and two heat dissipation components 2 form a group of heat dissipation channels, and each group of heat dissipation channels is spaced 90° apart; the 8 heat dissipation components 2 can also be spaced at differential intervals, and the distances between each heat dissipation component 2 are not equal.

[0038] It can be seen that the heat dissipation component 2 can allow the heat inside the disc body 1 to be evenly dissipated to the outside of the disc body 1, further improving the heat dissipation capacity of the brake disc 1 and improving the reliability and service life of the brake disc.

[0039] like Figure 1 As shown, the brake disc includes a groove 7 and an outer disc 8, the disc body 1 is recessed toward one side of the brake disc to form the groove 7, the outer disc 8 is the portion of the brake disc excluding the groove 7, the first end of the heat dissipation component 2 faces the inner wall of the groove 7, and the second end of the heat dissipation component 2 extends out of the outer disc 8. The first end of the heat dissipation component 2 can be in contact with the inner wall of the groove 7, or can be spaced apart from the inner wall of the groove 7.

[0040] like Figure 1-Figure 2 As shown, the heat dissipation assembly 2 includes a first heat dissipation section 3, a second heat dissipation section 43 and a third heat dissipation section 5. The first end of the first heat dissipation section 3 is arranged on the disk body 1, and the second end of the first heat dissipation section 3 is connected to the second heat dissipation section 43; the first end of the second heat dissipation section 4 is connected to the first end of the first heat dissipation section 3, and the second end of the second heat dissipation section 4 is connected to the third heat dissipation section 5; the first end of the third heat dissipation section 5 is connected to the second heat dissipation section 4, and the second end of the third heat dissipation section 5 extends to the outside of the disk body 1. The first heat dissipation section 3, the second heat dissipation section 4 and the third heat dissipation section 5 can be integrally formed, or can be connected by welding, gluing, clamping and the like. The first end of the first heat dissipation section 3 is the first end of the heat dissipation assembly 2 in this application, and the second end of the third heat dissipation section 5 is the second end of the heat dissipation assembly 2 in this application. Thus, the first heat dissipation section 3, the second heat dissipation section 4 and the third heat dissipation section 5 form a heat pipe that conducts the heat inside the disk body 1 to the outside of the disk body 1, and the heat pipe can be a flat tube or a round tube.

[0041] Specifically, cavities are provided inside the first heat dissipation section 3 , the second heat dissipation section 4 and the third heat dissipation section 5 , and the cavities are filled with heat dissipation materials, which can transfer the heat absorbed by the first heat dissipation section 3 to the third heat dissipation section 5 .

[0042] More specifically, the first heat dissipation section 3 absorbs the heat generated by the braking friction so that the liquid in the first heat dissipation section 3 evaporates into gas. The second heat dissipation section 4 is not in contact with the heat source of the first heat dissipation section 3 nor the cold source of the third heat dissipation section 5, isolating the heat exchange between the outside and the heat dissipation component 2 to ensure the efficiency of heat transfer. The third heat dissipation section 5 is a condensation section, and the third heat dissipation section 5 relies on the rotating airflow to dissipate the heat to the outside of the disk body 1.

[0043] It can be seen that in the present application, the brake disc transfers the heat generated by the friction of the disc body 1 during braking through the heat dissipation component 2, and transfers it from the disc body 1 to the outside of the disc body 1 through the first heat dissipation section 3, the second heat dissipation section 4 and the third heat dissipation section 5, thereby further improving the heat dissipation capacity of the brake disc and improving the reliability and service life of the brake disc.

[0044] like Figure 1-Figure 2 As shown, the heat dissipation assembly 2 is provided with fins 51, and there are multiple fins 51, which are distributed along the circumference of the disk body 1, and the multiple fins 51 are connected to the multiple third heat dissipation sections 5 in a one-to-one correspondence. The third heat dissipation section 5 of each heat dissipation assembly 2 is provided with fins 51, and the fins 51 and the third heat dissipation section 5 can be connected by welding, clamping or gluing, so that the fins 51 are fixed to the third heat dissipation section 5.

[0045] Specifically, the fins 51 may be multi-layer fins, and each layer of fins 51 is arranged at intervals on the third heat dissipation section 5 , so as to further increase the heat dissipation area of ​​the fins 51 .

[0046] Optionally, the fin 51 may be an annular fin, which is connected to the third heat dissipation section 5 of multiple heat dissipation components 2, and may be connected to some of the heat dissipation components 2 or all of the heat dissipation components 2, as long as the annular fin can be fixed to the heat dissipation component 2.

[0047] Optionally, the heat dissipation component 2 in the present application is also bent along the circumference of the brake disc and forms a certain angle with the radial direction, which can effectively alleviate the hindering effect of centrifugal force on the liquid reflux in the liquid absorption core 6 of the third heat dissipation section 5 when rotating.

[0048] It can be seen that in the present application, when the brake disc brakes, heat is conducted from the first heat dissipation section 3 to the third heat dissipation section 5, and the heat dissipation area of ​​the entire heat dissipation assembly is expanded through the fins 51, thereby further improving the heat dissipation performance of the brake disc, and improving the reliability and service life of the brake disc 1.

[0049] See also Figure 1-Figure 3A cavity is provided inside the heat dissipation component 2 , and the cavity is filled with phase change material. A liquid wick 6 is provided on the inner wall of the cavity, which is suitable for transferring the liquid in the third heat dissipation section 5 to the first heat dissipation section 3 .

[0050] Specifically, according to the working temperature classification, heat pipes are divided into low-temperature heat pipes (-270 ~ 0 ℃), normal temperature heat pipes (0 ~ 200 ℃), medium temperature heat pipes (200 ~ 600 ℃) and high temperature heat pipes (above 600 ℃). Due to the high heat generated by braking friction, the temperature of the brake disc 1 is usually as high as 500 ℃ or more, so the heat pipe used for brake disc heat dissipation should adopt high-temperature heat pipes (600 ~ 1100 ℃). High-temperature heat pipes were previously used in space radiators, hypersonic aircraft thermal protection, solar thermal utilization, high-temperature tubular furnaces and other fields in the space field. High-temperature heat pipes should be filled with phase change media with high phase change temperatures, mainly high-boiling point liquid metals such as sodium, potassium, sodium-potassium alloys, lithium, silver, and potassium. The shell of the heat dissipation component 2 in the present application adopts a high-temperature heat pipe. At the same time, a phase change medium is filled in the cavity, which can utilize the high phase change latent heat of the phase change medium to achieve large heat transmission.

[0051] Optionally, the wick 6 is a capillary structure. Since the capillary diameter is small and the flow speed is relatively slow, the flow can be well controlled, so that the output of the fluid can be accurately controlled. The wick 6 constructs a flow channel for the liquid in the third heat dissipation section 5 to flow back to the first heat dissipation section 3, and also constitutes a thermal path for heat transfer between the inner wall of the heat dissipation component 2 and the phase change medium.

[0052] The brake disc, brake system and vehicle provided by the present application are provided with a heat dissipation component 2 on the brake disc, the first end of the heat dissipation component 2 is outside the brake disc, the second end extends out of the brake disc, and a fin 51 is provided on the second end, thereby realizing the transfer of the temperature inside the brake disc to the outside for heat dissipation. The heat dissipation component 2 in the present application is provided with a liquid wick 6. When the temperature at the first end of the heat dissipation component 2 inside the brake disc is too high, the liquid near the first end of the heat dissipation component 2 of the liquid wick 6 vaporizes and moves toward the second end of the heat dissipation component 2. After heat dissipation at the second end, it is reliquefied and returns to the first end of the heat dissipation component 2 through the liquid wick 6 for cooling, and the cycle continues. As a result, the heat inside the brake disc is dissipated through the heat dissipation component 2, which ensures the heat dissipation effect of the brake disc and effectively improves the braking capacity of the whole vehicle. At the same time, the heat dissipation component 2 is provided with a liquid wick 6, which can cool the brake disc with the condensed liquid while dissipating heat, further improving the heat dissipation capacity of the brake disc and improving the reliability and service life of the brake disc.

[0053] A second aspect of the present application discloses a braking system, comprising a brake disc according to any embodiment of the first aspect of the present application.

[0054] The third aspect of the present application discloses a vehicle, comprising a brake disc according to any embodiment of the first aspect of the present application and / or a brake system according to the second aspect.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0056] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A brake disc, characterized in that: The brake disc comprises a disc body (1) and a heat dissipation component (2), wherein the heat dissipation component (2) extends radially along the disc body (1), a first end of the heat dissipation component (2) is arranged inside the disc body (1), and a second end of the heat dissipation component (2) extends outside the disc body (1), there are a plurality of heat dissipation components (2), and the plurality of heat dissipation components (2) are distributed along the circumference of the disc body (1), and the heat dissipation components (2) are suitable for conducting the internal heat of the disc body (1) to the outside of the disc body (1).

2. The brake disc according to claim 1, characterized in that Each of the heat dissipation components (2) comprises a first heat dissipation section (3), a second heat dissipation section (4) and a third heat dissipation section (5); The first end of the first heat dissipation section (3) is arranged on the disk body (1), and the second end of the first heat dissipation section (3) is connected to the second heat dissipation section (4); The first end of the second heat dissipation section (4) is connected to the first end of the first heat dissipation section (3), and the second end of the second heat dissipation section (4) is connected to the third heat dissipation section (5); The first end of the third heat dissipation section (5) is connected to the second heat dissipation section (4), and the second end of the third heat dissipation section (5) extends outside the disk body (1).

3. The brake disc according to claim 2, characterized in that The heat dissipation component (2) also includes fins (51).

4. The brake disc according to claim 3, characterized in that There are a plurality of fins (51), the plurality of fins (51) are distributed along the circumference of the disk body (1), and the plurality of fins (51) are connected to the plurality of third heat dissipation sections (5) in a one-to-one correspondence.

5. The brake disc according to claim 4, characterized in that The fins (51) are multi-layer fins, and the multi-layer fins are arranged at intervals in the third heat dissipation section (5).

6. The brake disc according to claim 3, characterized in that The fin (51) is an annular fin, and the annular fin is connected to a plurality of the third heat dissipation sections (5).

7. The brake disc according to claim 1, characterized in that Each heat dissipation component (2) has a cavity inside, and the cavity is filled with a phase change material.

8. The brake disc according to claim 7, characterized in that The inner wall of the cavity of each heat dissipation component (2) is provided with a liquid absorption core (6), and the liquid absorption core (6) is suitable for transporting liquid at the second end of the heat dissipation component (2) to the first end of the heat dissipation component (2).

9. The brake disc according to claim 8, characterized in that The liquid wick (6) is a capillary structure.

10. The brake disc according to claim 1, characterized in that The brake disc comprises a groove (7) and an outer disc (8); the first end of the heat dissipation component (2) faces the inner wall of the groove (7), and the second end of the heat dissipation component (2) extends out of the outer disc (8).

11. The brake disc according to claim 1, characterized in that Each of the heat dissipation components (2) is bent along the circumference of the disk body (1).

12. A braking system, characterized in that: A brake disc comprising any one of claims 1-11.

13. A vehicle, characterized in that: It comprises the brake disc described in any one of claims 1 to 11 and / or the brake system described in claim 12.

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