Air duct type aluminum brake disc with densely arranged ribs
Through the design of finely arranged aluminum ribs and air ducts, the low cooling efficiency and uneven temperature problems of cast iron brake discs are solved, efficient cooling and lightweighting of aluminum brake discs are achieved, and the connection strength and thermal conductivity are enhanced.
Patent Information
- Application Number
- CN202422195972.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The rib/air duct design of existing cast iron brake discs is difficult to manufacture and prone to the formation of pores and inclusions, resulting in low cooling efficiency and uneven temperature, affecting braking comfort and durability.
The aluminum brake disc is made of densely arranged aluminum ribs and air ducts, and the aluminum is connected by brazing process. The total number of ribs and air ducts is not less than 80, and the area ratio of ribs to air ducts is 35:65~65:35. The design of curved and straight ribs is combined to enhance heat convection and conduction performance.
The cooling efficiency and temperature uniformity of the brake disc are improved, the weight of the brake disc is reduced, the lightweight of the aluminum brake disc is achieved, and the connection strength and thermal conductivity are ensured through the brazing process.
Smart Images
Figure CN223447519U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of the aluminum brake disc for vehicle, specifically a kind of wind channel type aluminum brake disc of fine and dense arrangement rib. BACKGROUND
[0002] The wind channel type brake disc for vehicle is a known technology, including setting several ribs and corresponding formed wind channel between two annular friction discs, mainly relying on rib to realize energy conversion (kinetic energy is converted into heat energy) by heat conduction mechanism when braking, mainly relying on wind channel forced heat convection mechanism to cool the heat of brake disc when vehicle is running.
[0003] Current brake disc for vehicle is mainly made of cast iron, and the design of rib / wind channel is limited by the properties of cast iron material and the process of casting, for example, the as-cast fluidity of cast iron itself and the fluidity of cast iron liquid in sand core, although it is desirable to increase the total surface area of wind channel by using dense multi-rib to improve cooling efficiency, but the sand core of dense rib can block the flow of cast iron liquid in the wind channel sand core, and tend to produce high porosity, inclusions and surface roughness and other poor quality, usually increase the process difficulty and produce waste, while the structure of loose rib / wind channel reduces the surface area of wind channel, and in turn reduces the cooling efficiency of heat convection of brake disc.
[0004] Moreover, if the number of ribs / wind channels set is too small, the width of the wind channel between the corresponding ribs increases, during braking, the middle part of the annular disc connected with ribs has relatively low temperature due to short heat conduction distance, while the middle part of the annular disc connected with wind channel has relatively high temperature due to long heat conduction distance, the temperature difference between the two parts leads to uneven temperature of disc surface, and further leads to different material wear, and in the long run, the wear of disc surface will be convex-concave in radial direction, causing vibration and noise, and affecting the comfort of braking.
[0005] Compared with cast iron, aluminum material belongs to light material, and it has good heat transfer property, so the heat generated during braking tends to be conducted to hub system and cause other problems caused by high temperature, if brake disc is made of aluminum instead of iron, the design scheme of wind channel of cast iron brake disc cannot be simply used, and brake disc must consider improving heat convection performance to improve cooling performance, and further improve cooling efficiency.
[0006] Therefore, there are still problems to be solved in design and process for wind channel type aluminum brake disc. UTILITY MODEL CONTENTS
[0007] In order to make up for the shortcomings of prior art and solve the above problems, a kind of wind channel type aluminum brake disc with fine and dense arrangement rib is proposed.
[0008] The technical scheme adopted by the utility model to solve its technical problems is:
[0009] The utility model discloses a wind channel type aluminum brake disc of fine and dense arrangement rib, including:
[0010] Aluminum brake disc, this aluminum brake disc includes:
[0011] Rear brake ring;
[0012] Front brake ring;
[0013] Rib, in the fine and dense interval arrangement mode between front brake ring and rear brake ring;
[0014] Filler, through brazing process, connect front brake ring, rear brake ring and fine and dense arrangement rib together, and make aluminum brake disc;
[0015] Among them, single rib width is 1-6mm, and the fine and dense interval arrangement of rib corresponds to the fine and dense interval wind channel, wherein the total number of rib and wind channel is not less than 80, and the ratio of rib cross-sectional area and wind channel cross-sectional area on the total surface area of annular rib and wind channel is 35:65~65:35.
[0016] Preferably, the rib includes a plurality of straight ribs, and the spacing between adjacent two straight ribs forms an equal number of wind channels.
[0017] Preferably, the front brake ring includes a front brake ring ring part and a front brake ring cap part, wherein the front brake ring cap part includes an axle hole and a bolt hole for mounting the aluminum brake disc on the axle.
[0018] Preferably, the inner diameter of the aluminum brake disc is provided with an air inlet, and the outer diameter is provided with an air outlet.
[0019] Preferably, the rib further includes a rib outer angle towards the outside of the disc and a rib inner angle towards the inside of the disc.
[0020] Preferably, the rib further includes a curved rib, which is arranged in a circular ring shape on the aluminum brake disc, and the ratio of the cross-sectional area of the curved rib to the wind channel is 45:55.
[0021] Preferably, a plurality of round holes are provided on the straight rib, and square grooves are provided on both sides of the straight rib.
[0022] Preferably, the rib further includes a long rib and a short rib, and the long rib and the short rib are arranged in pairs and alternately.
[0023] The long rib and the short rib both have a plurality of rib holes, and the long rib and the short rib are arranged in the center relative to the annular belt surface.
[0024] Preferably, the air outlet of the wind channel is a triangular outlet, and the air inlet of the wind channel is a triangular inlet.
[0025] The utility model discloses the beneficial effects of:
[0026] The utility model provides a fine and dense arrangement rib's air duct formula aluminium brake disc compares with loose rib arrangement, and the fine and dense arrangement of rib improves the air duct and airflow contact area, and further enhances the cooling efficiency and the uniformity of brake disc disc surface temperature distribution, and realizes the metallurgical connection between each component through brazing process, improves the heat transfer efficiency between each component, and realizes the light weight of vehicle brake disc. BRIEF DESCRIPTION OF DRAWINGS
[0027] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model and do not constitute undue limitation on the utility model. In the drawings:
[0028] Figure 1 It is the half cut side view of the utility model fine and dense rib arrangement aluminium brake disc,
[0029] Figure 2 It is the cutaway front view along line A-A, and the arrangement of straight rib is shown. Figure 1
[0030] Figure 3 It is the partial perspective view and shows that the straight rib is in the state of front brake ring.
[0031] Figure 4 It is the cutaway front view along line A-A, and the arrangement of curved rib is shown. Figure 2 Figure 1 It is the perspective view and shows that the curved rib is in the state of front brake ring.
[0032] Figure 5 It is the perspective view and shows some change embodiment of rib, and it includes
[0033] a-6e. Figure 6 Figure 6 It is the cutaway view along line A-A, and the arrangement of matched long and short hole rib is shown.
[0034] Figure 7 Figure 2 It is the partial perspective view and shows the state of long and short hole rib, and shows the formation of wind channel according to the rotation direction of brake disc. Figure 1
[0035] Figure 8
[0036] Figure: 1, brake disc; 2, rear brake ring; 3, front brake ring; 4, straight rib; 5, brazing filler metal; 6, front brake ring ring part; 7, front brake ring cap part; 8, axle hole; 9, bolt hole; 10, air duct; 11, air inlet; 12, air outlet; 13, rib outer rake angle; 14, rib inner pitch angle; 15, curved rib; 16, round hole; 17, square groove; 18, long rib; 19, short rib; 20, rib hole; W, brake disc spiral direction; f (f1; f2; f3; f4; f5; f6), wind direction. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0038] The "aluminum brake disc" mentioned in the specification refers to a material mainly made of aluminum or aluminum alloy, including but not limited to high-temperature-resistant aluminum, aluminum-based composite materials, aluminum alloy composite materials, etc. The brake disc of the utility model realizes lightweight due to the use of aluminum materials.
[0039] The "brazing filler metal" mentioned in the specification refers to an aluminum alloy brazing filler metal for brazing various aluminum material components together. The brazing filler metal is usually an aluminum-silicon alloy, in which the silicon content is about 6-12%. By brazing, the oxide film (aluminum oxide, etc.) at the brazing joint surface is broken by a flux (such as fluoride, chloride, etc.), so that the joint part not only has high thermal conductivity, but also has high joint strength.
[0040] Referring to the drawings, Figure 1 is a half-section side view of the fine rib arrangement aluminum brake disc 1 of the utility model. The nominal size of the brake disc friction ring (rear brake ring 2 and front brake ring ring part 6) of the embodiment of the utility model is: φ340mm (outer diameter) x φ220mm (inner diameter) x 33mm (thickness). The aluminum brake disc 1 comprises: a rear brake ring 2, a front brake ring 3, a straight rib 4, a brazing filler metal 5 arranged between the brake rings (2, 3) and the straight rib 4, and the components are connected together by brazing to form the aluminum brake disc 1. The front brake ring 3 further comprises: a ring part 6 and a cap part 7, wherein the cap part 7 comprises an axle hole 8 and a bolt hole 7 for mounting the brake disc 1 on the axle.
[0041] Figure 2 is along Figure 1The sectional view of line A-A shows the arrangement of straight ribs 4, the spacing between adjacent straight ribs 4 forms an equal number of air ducts 10, when the brake disc rotates in the direction of arrow W, air will flow into the air ducts from the inlet 11 at the inner diameter and flow out from the outlet 12 at the outer diameter, the continuous air flow enables forced heat convection cooling of the brake disc. It is known that the greater the contact area between the convection air and the air ducts 10, the higher the cooling efficiency, in this embodiment, the ribs 4 have a width of 2mm, and 180 ribs 4 are evenly arranged on the entire annular surface, thus forming 180 air ducts 10, therefore, the fine arrangement of the ribs greatly increases the surface area of the air ducts 10, and correspondingly improves the forced cooling effect of the brake disc, and the fine distribution shortens the distance between the middle parts of adjacent ribs 4 / air ducts 10, thereby reducing the temperature difference between the connecting parts of the front and rear brake rings 2, 3 and the ribs 4 / air ducts 10, and greatly improving the temperature distribution uniformity of the brake disc 1.
[0042] In the utility model, the width of a single rib is 1-6mm, the fine arrangement of the ribs produces fine-interval air ducts, and the total number of ribs / air ducts is not less than 80, therefore, on the total surface area formed by the ribs and the air ducts, the ratio of the cross-sectional area of the ribs to the cross-sectional area of the air ducts is 35:65-65:35, and the heat management of the ribs / air ducts is designed on this basis. In other words, the cross-sectional area of the ribs 4 accounts for 35-65% of the area of the annular surface, if the area occupied by the ribs 4 is less than 35% (or the area occupied by the air ducts 10 is more than 65%), the brazing connection area with the brake ring (2, 3) is insufficient, and the connection strength and heat conduction are reduced, and if the area occupied by the ribs 4 is more than 65% (or the area occupied by the air ducts is less than 35%), the total surface area of the air ducts 10 is low, and the heat convection performance is weakened.
[0043] Figure 3 The partial perspective view shows that the straight ribs 4 are in the state of the front brake ring 3, and the straight ribs 4 are further described in detail, when the brake disc 1 rotates in the direction of arrow W, air convection will be generated in the direction of arrow f from inside to outside, the ribs 4 further include a rib outer angle 13 facing outward of the disc and a rib inner angle 14 facing inward of the disc, the rib outer angle 13 helps the internal air flow to be smoothly discharged under the action of centrifugal force, and the rib inner angle 14 helps to increase the air flow, and both of them enhance the cooling efficiency.
[0044] In Figures 1-3 the aluminum brake disc 1 with the linear fine ribs 4, the ratio of the cross-sectional area of the ribs 4 / air ducts 10 is about 40:60.
[0045] Figure 4 is similar to Figure 2 along Figure 1A-A sectional view of the front brake ring 3 shows the arrangement of the curved ribs 15. In this embodiment, the nominal size of the friction ring is the same as described above, but the straight ribs 4 are replaced by curved ribs 15. In addition, the rib width t is set to 1.5 mm. Compared with the straight ribs 4, the curved ribs 15 have a longer rib length, which is advantageous for increasing the air capacity and heat dissipation area of the air duct. When the brake disc 1 rotates in the direction of arrow W, the curved shape of the curved ribs 15 helps to increase the air speed in the air duct under the action of centrifugal force, thereby enhancing the cooling effect.
[0046] Figure 5 The partial perspective view of the curved ribs 15 in the front brake ring 3 further illustrates the curved ribs 15. When the brake disc 1 rotates in the direction of arrow W, air convection will be generated from the inside to the outside in the direction of arrow f. The curved ribs 15 further include a rib inner pitch angle 14 facing the inside of the disc, which helps to increase the air flow and enhance the cooling efficiency.
[0047] In Figures 4-5 the curved fine rib 15 arrangement aluminum brake disc 1 shown, the ratio of the cross-sectional area of the rib 15 / air duct 10 is about 45:55.
[0048] Although Figure 1 and Figure 2 respectively illustrate the straight ribs 4 and the curved ribs 15, various changes can be made on the basis of them, Figure 6 a-e are some changed embodiments of the ribs in partial perspective view, in which:
[0049] Figure 6 a is a perspective view of the straight rib 4 of Figures 1-3 ;
[0050] Figure 6 b is a perspective view of the curved rib 15 of Figures 4-5 ;
[0051] Figure 6 c is a perspective view of the straight rib 4 with 5 round holes 16 of Figures 1-3 ;
[0052] Figure 6 d is a perspective view of the straight rib 4 with 2 square grooves 17 on one side of Figures 1-3 ;
[0053] Figure 6 d is a perspective view of the straight rib 4 with 1 square groove 17 on each side of Figures 1-3 .
[0054] It should be understood that the schemes shown herein are not all the schemes of the utility model, and the size, shape, distribution and number of holes or grooves can be determined as needed.
[0055] Figure 7 is similar Figure 2 Along Figure 1 The sectional front view along line AA shows the alternating arrangement of the paired long ribs 18 and the short ribs 19. In this schematic diagram, there are 90 pairs of paired long / short ribs (18 / 19), the long ribs 18 have 5 rib holes 20, and the short ribs 19 have 4 rib holes 20. The long / short ribs 18 / 19 are arranged in a central position relative to the annular strip surface. Through such an arrangement, the air outlet 12 of the air duct 10 is a triangular outlet, minimizing airflow obstruction; at the same time, the air inlet 11 of the air duct 10 is a triangular inlet, maximizing the airflow rate, thereby further improving the cooling efficiency.
[0056] Figure 8 The partial perspective view of the front brake ring 3 shows some paired long / short ribs 18 / 19. The long / short ribs 18 / 19 are further described in detail. The rib holes 20 on the long / short ribs 18 / 19 further increase the surface area in contact with the airflow. When the brake disc 1 is static, the airflow within the air duct is natural convection, for example, from inside to outside (or outside to inside) in the direction f1 shown in the figure. However, when the brake disc 1 rotates at a low speed in the direction of arrow W, the centrifugal force of the rotation causes the natural convection f1 to generate a forced convection diversion f2. As the speed gradually increases, more forced diversions f3, f4, f5, and f6 are generated. Therefore, whether the brake disc 1 rotates at low or high speeds, the airflow is unimpeded (low wind resistance), achieving extremely high cooling efficiency. This also improves the uniformity of the temperature distribution of the brake disc 1, resulting in an excellent forced convection cooling effect.
[0057] Compared with the current cast iron brake discs made by casting technology, the proposal of the present invention is difficult or impossible to achieve. The solution of the present invention adopts the brazing technology of aluminum alloy, so that customized aluminum brake discs can be produced through simple component modeling and component arrangement. The brake disc has reliable connection strength and good comprehensive performance of heat conduction / heat convection, which embodies good practicality, low cost, and flexibility of single-piece and batch production.
[0058] The aluminum brake disc with dense rib arrangement of the utility model realizes the lightweighting of the vehicle brake disc by means of a novel structure and an applicable process method.
Claims
1. A duct-type aluminum brake disc with densely arranged ribs, characterized in that: include: An aluminum brake disc (1), comprising: rear brake ring (2); Front brake ring (3); Ribs are arranged in a closely spaced manner between the front brake ring (3) and the rear brake ring (2); A brazing material (5) is used to connect the front brake ring (3), the rear brake ring (2) and the closely arranged ribs together through a brazing process to form an aluminum brake disc (1); The width of a single rib is 1-6 mm, and the closely spaced arrangement of the ribs corresponds to the generation of closely spaced air ducts (10). The total number of ribs and air ducts (10) is not less than 80, and the ratio of the cross-sectional area of the ribs to the cross-sectional area of the air duct (10) is 35:65 to 65:35 on the total surface area of the ring formed by the ribs and the air duct (10).
2. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The ribs include a plurality of straight ribs (4), and the space between two adjacent straight ribs (4) forms an equal number of air ducts (10).
3. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The front brake ring (3) comprises a front brake ring portion (6) and a front brake ring cap portion (7), wherein the front brake ring cap portion (7) comprises an axle shaft hole (8) and a bolt hole (9) for mounting the aluminum brake disc (1) on the axle.
4. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The aluminum brake disc (1) has an air inlet (11) formed on its inner diameter and an air outlet (12) formed on its outer diameter.
5. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The ribs further include a rib outer elevation angle (13) toward the outside of the disc and a rib inner depression angle (14) toward the inside of the disc.
6. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The ribs further include curved ribs (15), which are arranged in a circular shape on the aluminum brake disc (1), and the ratio of the cross-sectional area of the curved ribs (15) to that of the air duct (10) is 45:
55.
7. The duct-type aluminum brake disc with densely arranged ribs according to claim 2, characterized in that: A plurality of circular holes (16) are provided on the straight rib (4), and square grooves (17) are provided on both sides of the straight rib (4).
8. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The ribs further include long ribs (18) and short ribs (19), and the long ribs (18) and short ribs (19) are arranged alternately in pairs; The long ribs (18) and the short ribs (19) are each provided with a plurality of rib holes (20), and the long ribs (18) and the short ribs (19) are both arranged in a central position relative to the annular band surface.
9. The duct-type aluminum brake disc with densely arranged ribs according to claim 1, characterized in that: The air outlet (12) of the air duct (10) is a triangular outlet, and the air inlet (11) of the air duct (10) is a triangular inlet.