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CN-121993517-A - Light and strong-heat-dissipation double-channel brake disc and preparation method thereof

CN121993517ACN 121993517 ACN121993517 ACN 121993517ACN-121993517-A

Abstract

A light and strong heat-dissipation double-pass air duct brake disc comprises a convection heat disc, a friction disc pair and a heat pipe array, wherein the convection heat disc is integrally connected with the heat pipe array and arranged between the friction disc pair to form two convection spaces positioned on two sides of the convection heat disc, heat exchange is carried out between heat pipe shells of the heat pipe array and air in the convection spaces to form a second heat dissipation path, the friction disc pair is oppositely arranged on two sides of the convection heat disc and integrally cast and connected with two ends of the heat pipe array, the heat pipe array is horizontally embedded in the friction disc pair at two ends of a central axis to form a first heat dissipation path in the heat pipe array, and the first heat dissipation path does not spatially intersect with the second heat dissipation path. The double-channel brake disc has the advantages of light weight, strong heat dissipation and low cost.

Inventors

  • JIN KELIANG
  • ZHANG PENG
  • DONG ZIHUA

Assignees

  • 浙江隆中机械股份有限公司

Dates

Publication Date
20260508
Application Date
20260403

Claims (10)

  1. 1. A light and strong radiating double-pass air duct brake disc is characterized by comprising The convection heat plate (10) is arranged between the friction plate pairs (20) and integrally connected with the heat pipe array (30), the convection heat plate (10) and the heat pipe array (30) and the friction plate pairs (20) on the convection heat plate form two convection spaces (11) positioned at two sides of the convection heat plate, and in the convection spaces (11), heat pipe shells of the heat pipe array (30) exchange heat with air in a convection manner to dissipate second heat (Q 2 ) to form a second heat dissipation path (14); The friction disc pair (20) is oppositely arranged at two sides of the convection heat disc (10) and integrally connected with two ends of the heat pipe array (30) in a casting mode, a plurality of radiation ribs (21) are arranged in each disc inner hole of the friction disc pair (20), a plurality of air inlet holes (22) are formed between the radiation ribs (21), and the circle centers of the air inlet holes (22) form a center contour line circle of the air inlet holes; The heat pipe array (30) is embedded in the friction disc pair (20) at two ends of the heat pipe array (30) horizontally with the central axis, heat is used for enabling working fluid to be changed into gas from liquid to absorb first heat (Q 1 ) in the heat pipe array (30) to form a first heat dissipation path (34), and the first heat dissipation path (34) is not crossed with the second heat dissipation path (14) in space.
  2. 2. A lightweight and strong heat dissipating dual pass brake disc as defined in claim 1, further comprising a hub portion (40) including a hub barrel portion (41) coupled to the pair of friction discs (20) and a coupling cap portion (42) coupled to the vehicle hub flange, the hub barrel portion (41) integrally coupling the radiation ribs (21) of both friction discs of the pair of friction discs (20) simultaneously.
  3. 3. A lightweight and strongly radiating two-way air duct brake disc as claimed in claim 2, characterized in that the brake disc rotates clockwise in correspondence with the forward movement of the vehicle, the array of heat pipes (30) is arranged in rows in the radial direction and in columns in the circumferential direction, each column being arranged to form a radially convex curve (C) convexly curved in the anticlockwise direction, in each convection space (11) a plurality of first air ducts (12) are formed between adjacent columns, which are centred on the axis of rotation O-O of the pair of friction discs (20), the first air ducts (12) having air duct inlets (12.1) located on the outer circle of the pair of friction discs (20) and air duct outlets (12.2) located on the inner hole of the pair of friction discs (20), the centre line direction of the air duct inlets (12.1) of the first air ducts (12) coinciding with the radial vector from the midpoint of the outlets to the axis of rotation O-O, the centre line direction of the air duct outlets (12.2) of the first air ducts (12) being tangential to the centre contour circle of the inlet opening (22).
  4. 4. A lightweight and strongly radiating dual-pass air duct brake disc as claimed in claim 2, characterized in that the heat pipe array (30) comprises an evaporator (31), a condenser (32), a steam feed pipe (33) and a liquid feed pipe (35), the evaporator (31) array being arranged between the pair of friction discs (20), the condenser (32) being embedded in the convection heat disc (10), the steam feed pipe (33) and the liquid feed pipe (35) being embedded in the convection heat disc (10) along the evaporator (31) and communicating the condenser (32) with the evaporator (31).
  5. 5. The dual-pass brake disk of claim 4, wherein the evaporator (31) is a dual-evaporation heat pipe (50), the dual-evaporation heat pipe (50) comprises a supporting heat conducting column (51), a heat pipe shell (52) and a liquid suction core (54), the heat pipe shell (52) surrounds the supporting heat conducting column (51) to form a heat pipe annular cavity (53) and two protruding shaft parts extending out of two ends of the heat pipe annular cavity, the liquid suction core (54) is arranged in the heat pipe annular cavity (53) to form air buffer chambers (57) at two ends of the heat pipe annular cavity (53), and a liquid buffer chamber (55) is formed in the middle of the heat pipe annular cavity (53).
  6. 6. The brake disc with the double-pass air duct, which is light in weight and strong in heat dissipation, according to claim 5, is characterized in that the liquid absorption core (54) comprises an inner hole ring core (54.1) which is integrally connected and extends along the axial direction and a flange wall core (54.2) which extends along the vertical axial direction, the heat pipe shell (52) comprises an end cover part (52.2) and two heat insulation ring walls (52.4) which are arranged at intervals along the axial direction, two spacing ring cores (54.3) are arranged at the periphery of the inner part Kong Huanxin (54.1) corresponding to the heat insulation ring walls, the inner hole surface of the inner hole ring core (54.1) is in contact with the peripheral surface of a supporting heat conducting column (51), the heat insulation ring walls (52.4) are arranged in the two spacing ring cores (54.3) so as to form an annular liquid buffer chamber (55) among the annular shell part (52.1), the heat insulation ring walls (52.4) and the inner hole ring cores (54.1), and the outer surfaces of the flange wall cores (54.2) are in contact with the inner surfaces of the end cover part (52.2) so as to form a heat buffer chamber (57) between the two heat pipe ring cores (52.1).
  7. 7. A lightweight and strongly radiating dual-pass brake disc according to any one of claims 4-6, characterized in that the convection disc (10) is provided with a plurality of embedded areas (37) corresponding to the heat pipe array (30) in the first air passage (12), the outermost radius of the embedded areas (37) being equal to or smaller than the array radius of the corresponding evaporator (31), the embedded areas (37) of the evaporator E ij being the area between E ij 、e i,j-1 ,e i-1,j ,e i-1,j-1 for the heat pipe array E i×j , wherein i = 2..m, j = 1..n, m being the number of radial rows and n being the number of circumferential columns, and the embedded areas of the corresponding condenser being the hub area between the friction disc pair (20) for the evaporator E 1j provided at the inner hole edge of the friction disc pair (20).
  8. 8. A lightweight and strongly radiating dual-pass brake disc as claimed in any one of claims 4 to 6, characterized in that the convection disc (10) comprises an embedded plate (15), the embedded plate (15) is concentrically provided with a plurality of annular ribs (16) at intervals, an embedded annular groove (17) is formed between adjacent annular ribs (16), the condenser (32) comprises a condenser tube (36), and the condenser tube (36) is reciprocally and retractably embedded in the embedded groove of the embedded region (37) corresponding to the first air passage (12).
  9. 9. The dual-pass air duct brake disk of claim 8, further comprising a phase-change heat sink (60) embedded in the convection heat disk (10), wherein the heat pipe array (30) passes through the phase-change heat sink (60), the phase-change heat sink (60) comprises a heat sink housing (61) and a plurality of heat absorbing pipes (62) corresponding to the heat pipe array (30), a heat sink cavity (63) is formed between the heat absorbing pipes (62) and the heat sink housing (61), a phase-change material (65) is arranged in the heat sink cavity (63), and the heat absorbing pipes (62) are penetrated and thermally coupled around the evaporator (31) of the heat pipe array (30) through a thermal interface resin (66).
  10. 10. A method for preparing a light-weight and strong-heat-dissipation double-channel brake disc according to any one of claims 2-9, which is characterized by comprising the following steps, S1, preparing a heat pipe array (30), and integrally injection molding a convection heat disc (10) by taking the heat pipe array (30) as an insert to obtain a heat radiation module; s2, taking the heat dissipation module as an insert, taking the hub part (40) as an insert, and integrally casting and forming the friction disc pair (20) to obtain the brake disc.

Description

Light and strong-heat-dissipation double-channel brake disc and preparation method thereof Technical Field The invention relates to the technical field of manufacturing of new energy vehicle accessories, in particular to a light and strong heat dissipation double-channel brake disc and a preparation method thereof. Background The brake disc is a core component in a vehicle braking system, and is arranged in the wheels of an automobile/motorcycle, so that the pressure in a hydraulic system is effectively applied to a brake caliper, and the brake disc and the wheel rotate to carry out intense friction so as to realize the deceleration of the wheels. During braking, the vehicle is decelerated by friction, whereby kinetic energy is converted into heat, which in turn results in the entire disk brake and hub, including the brake caliper and the brake fluid therein, also being heated strongly. On the premise of increasing the general quality of new energy automobiles and motorcycles, the strong heating of the brake disc is not desirable. Good brake discs have three objectives, wear resistance, heat dissipation and light weight, with heat dissipation being the most critical. About 90% of the energy consumed during braking is absorbed by the brake disc as heat and from there transferred to the ambient air. In extreme conditions, high temperatures of up to 700 ℃ may be generated between the brake disc, brake pads and brake shoes, the localized high temperature of the frictional heat causing localized wear, cracking, deformation of the brake disc, and the high temperature of the frictional heat being transferred to the brake fluid, resulting in reduced or even lost braking performance. The Zhejiang Tai electromechanical Co., ltd discloses an internal ventilation brake disk (CN 106090080A, publication day: 2016, 11, 09), which aims to solve the problems of the heat dissipation efficiency and heavier weight of the internal ventilation brake disk designed by the existing continuous reinforcing ribs, and provides an internal ventilation brake disk, wherein two annular friction disks 1 are fixedly connected through a series of support columns and define ventilation channels, and an inner support column and an outer support column form a anticlockwise arc. The air duct has the advantages that the constructed air duct is communicated with each other and has high specific surface area, so that the quality of the brake disc is reduced while the efficient heat dissipation capability is ensured. The existing ventilation brake disc is mainly used for improving the heat dissipation efficiency only by focusing on optimizing the smoothness of the ventilation channel, the heat dissipation efficiency is improved only limitedly, and the phenomenon of untimely overheat of heat dissipation still can occur under the use condition of long-time braking in the relatively hot south. The Zhejiang power binding information intelligent braking system corporation discloses a double-channel air brake disc (CN 216922965U, publication day: 2022, month 07 and 08), in order to solve the problem that the brake disc with the thickness of less than 34mm can not meet the heat dissipation performance and the light weight at the same time, an intermediate disc is arranged between the first friction disc and the second friction disc, and an intermediate disc connecting disc cap is arranged between the first friction disc and the second friction disc. The thickness of the middle disc is 1cm thinner than that of the first friction disc and the second friction disc, the diameter of the middle disc is reduced by 8mm relative to that of the inner friction disc and the outer friction disc, and the weight of the brake disc is greatly reduced. The first friction plate and the middle plate are provided with first reinforcing ribs at intervals, a first ventilation channel is formed between every two adjacent first reinforcing ribs, the second friction plate and the middle plate are provided with second reinforcing ribs at intervals, and a second ventilation channel is formed between every two adjacent second reinforcing ribs. The first reinforcing ribs and the second reinforcing ribs are arranged in a staggered manner, so that the overall strength can be effectively improved, and the outlets of the first ventilating duct and the second ventilating duct are arranged in a staggered manner, so that the heat dissipation capacity can be effectively improved. The double-channel brake disc has better heat dissipation effect than the single-channel brake disc, but the increased heat dissipation effect also sacrifices weight and has limited heat dissipation. Therefore, on the premise that the general vehicle weight of the new energy vehicle is increased, the light-weight and strong-heat-dissipation double-channel brake disc is expected to be provided, on the premise of light weight, the heat dissipation efficiency is improved in a multiplied way, and the preparation process is