A brake disc cooler

Abstract

The present invention provides a brake disc cooler, which includes a first plate member and a second plate member. There is a cooling cavity between the first plate member and the second plate member. The cooling cavity has a boiling surface and a condensation surface. The boiling surface is the inner side of the first plate member in the cooling cavity, and the condensation surface is arranged between the first plate member and the second plate member. The distance from the point on the condensation surface close to the first plate member to the axis of the brake disc is farther than the distance from the point on the condensation surface close to the second plate member to the axis of the brake disc. A heat dissipation member is provided on the side of the condensation surface facing away from the cooling cavity. The present invention adopts boiling cooling technology. The phase change working medium absorbs the heat of the brake disc on the boiling surface and boils. The vaporized working medium flows towards the condensation surface under the action of pressure and releases heat on the condensation surface, condensing into a liquid. The heat released by the working medium is released into the air through the heat dissipation member and carried away by the flowing air. The condensed liquid flows in the cooling cavity and flows to the boiling surface to continue absorbing heat.

Description

Technical Field

[0001] The present invention relates to the field of brake discs, and particularly to a brake disc cooler. Background Art

[0002] With the rapid development of high-speed trains, the speed of trains is constantly increasing, which poses more stringent requirements for the heat dissipation of brake discs. Therefore, effectively solving the heat dissipation problem of high-speed train brake discs has become a key technology that must be solved in the development of high-speed trains.

[0003] Traditional ventilated disc brake discs use the running wind of the train to forcibly air-cool the brake discs. Due to the limitations of structural strength and the forced air-cooling heat dissipation method, the heat dissipation effect can no longer meet the braking requirements of existing trains. Summary of the Invention

[0004] The present invention provides a brake disc cooler to solve the above problems.

[0005] A brake disc cooler includes: a first plate member and a second plate member, and the first plate member is closely attached to the brake disc;

[0006] There is a cooling cavity between the first plate member and the second plate member, and there is a phase change working fluid in the cooling cavity;

[0007] The cooling cavity has a boiling surface and a condensation surface. The boiling surface is the inner side surface of the first plate member in the cooling cavity. The condensation surface is arranged between the first plate member and the second plate member. The distance from the point on the condensation surface close to the first plate member to the axis of the brake disc is farther than the distance from the point on the condensation surface close to the second plate member to the axis of the brake disc. A heat dissipation member is provided on the side of the condensation surface facing away from the cooling cavity.

[0008] Further, the brake disc includes two outer side surfaces and two inner side surfaces. There are two first plate members in total, and the two first plate members are respectively closely attached to different inner side surfaces. There are two second plate members in total, and the two second plate members are closely attached to each other.

[0009] Further, the condensation surface is a part of a conical surface, and the included angle between the generatrix of the conical surface and the axis of the brake disc is 60° - 80°;

[0010] The cooling cavity further includes an auxiliary surface, and the auxiliary surface is arranged between the first plate member and the second plate member and is parallel to the condensation surface.

[0011] Further, a disc-shaped cooling member is provided between the first plate member and the second plate member. There are multiple cooling cavities, and the multiple cooling cavities are circumferentially arranged inside the cooling member;

[0012] The inner side surface of the cooling member is a conical surface, and the heat dissipation member is provided on the conical surface.

[0013] Further, the cooling chamber has a first side wall and a second side wall. The planes where the first side wall and the second side wall are located intersect at the axis of the cooling member, and the included angle between the first side wall and the second side wall is 2°-10°.

[0014] Further, the heat dissipation member is a heat dissipation fin, and the heat dissipation fin is an annular disc perpendicular to the axis of the brake disc.

[0015] A brake disc cooler disclosed by the present invention adopts a boiling cooling technology. The phase change working fluid absorbs the heat of the brake disc on the boiling surface and boils. The vaporized working fluid flows to the condensation surface under the action of pressure and releases heat on the condensation surface, condensing into a liquid. The heat released by the working fluid is released into the air through the heat dissipation member and carried away by the flowing air. The condensed liquid flows in the cooling chamber and flows to the boiling surface to continue absorbing heat. Since the working fluid in the cooling chamber continuously boils and condenses, the heat of the brake disc is efficiently transferred to the ambient air, thereby producing a good heat dissipation effect on the brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Structural schematic diagram of a brake disc cooler disclosed in an embodiment of the present invention;

[0018] Figure 2 For Figure 1 Enlarged view of part A in

[0019] Figure 3 Enlarged view of the cooling chamber disclosed in an embodiment of the present invention;

[0020] Figure 4 Radial cross-sectional view of the cooling member disclosed in an embodiment of the present invention;

[0021] Figure 5 For Figure 4 Enlarged view of part B in

[0022] Figure 6 Overall structural schematic diagram of the cooling member disclosed in an embodiment of the present invention.

[0023] In the figure: 1. First plate member; 2. Second plate member; 3. Brake disc; 31. Outer side surface; 32. Inner side surface; 4. Cooling chamber; 41. Boiling surface; 42. Condensing surface; 43. First side wall; 44. Second side wall; 45. Auxiliary surface; 5. Heat dissipating member; 6. Cooling member. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1-3 shown, a brake disc cooler includes: a first plate member 1 and a second plate member 2, the first plate member 1 being in close contact with the brake disc 3; a cooling chamber 4 is provided between the first plate member 1 and the second plate member 2, and there is a phase change working fluid in the cooling chamber 4; the first plate member 1 and the second plate member 2 are made of materials that are easy to conduct heat, such as aluminum materials such as 6063 and 6061 aluminum alloys or copper materials. The phase change working fluid can be water, a mixture of water and ethylene glycol, an organic working fluid, a new type of cooling nanofluid, etc.

[0026] The cooling chamber 4 has a boiling surface 41 and a condensing surface 42. The boiling surface 41 is the inner side surface of the first plate member 1 in the cooling chamber. The condensing surface 42 is provided between the first plate member 1 and the second plate member 2. The distance from the point on the condensing surface 42 close to the first plate member 1 to the axis of the brake disc 3 is farther than the distance from the point on the condensing surface 42 close to the second plate member 2 to the axis of the brake disc 3. A heat dissipating member 5 is provided on the side of the condensing surface 42 facing away from the cooling chamber.

[0027] In the axial sectional view, the condensing surface 42 is an oblique line, one end intersecting with the first plate member 1 and the other end intersecting with the second plate member 2, and the intersection with the first plate member 1 is farther from the axis of the brake disc.

[0028] During the braking process of the brake disc 3, heat is generated by friction. The heat is transferred to the first plate member 1 and absorbed by the phase change working fluid on the boiling surface 41. The phase change working fluid absorbs heat and boils on the boiling surface 41, becoming a gaseous working fluid. Under the vapor pressure, the gaseous working fluid moves towards the condensing surface 42. The gaseous working fluid releases heat on the condensing surface 42, and the heat is released into the air through the heat dissipating member on the back side of the condensing surface 42. After the gaseous working fluid releases heat, it condenses into a liquid working fluid, and the liquid working fluid returns to the boiling surface under the action of centrifugal force, and so on in a cycle.

[0029] The brake disc 3 includes two outer side surfaces 31 and two inner side surfaces 32. There are two first plates 1 in total, and the two first plates 1 are respectively arranged in close contact with different inner side surfaces 32. There are two second plates 2 in total, and the two second plates 2 are arranged in close contact with each other.

[0030] A brake disc includes two pieces, making the two surfaces facing outward of the brake disc the working surfaces. In this embodiment, the working surfaces of the friction brake are made the outer side surfaces. Between the two brake disc pieces, two brake disc coolers are provided to cool the two working surfaces respectively.

[0031] The condensation surface 42 is a part of a conical surface, and the included angle between the generatrix of the conical surface and the axis of the brake disc is 60° - 80°; setting the condensation surface 42 as a conical surface can increase the area of the condensation surface and improve the heat dissipation effect.

[0032] The cooling cavity 4 further includes an auxiliary surface 45, and the auxiliary surface 45 is arranged between the first plate 1 and the second plate 2 and is parallel to the condensation surface 42.

[0033] The auxiliary surface 45 makes the axial cross-sectional shape of the cooling cavity 4 a parallelogram, which can make the phase change working medium more easily concentrated on the boiling surface 41, with higher heat absorption efficiency. For the same amount of phase change working medium, the contact area with the boiling surface 41 is larger.

[0034] As Figure 4 shown, a disc-shaped cooling member 6 is provided between the first plate 1 and the second plate 2, and there are a plurality of cooling cavities 4. The plurality of cooling cavities 4 are circumferentially arranged in the cooling member 6;

[0035] The inner side surface of the cooling member 6 is a conical surface. As Figure 6 shown, the heat dissipation member 5 is provided on the conical surface.

[0036] As Figure 5 shown, the cooling cavity 4 has a first side wall 43 and a second side wall 44. The plane where the first side wall 43 is located and the plane where the second side wall 44 is located intersect at the axis of the cooling member 6, and the included angle between the first side wall 43 and the second side wall 44 is 2° - 10°.

[0037] In this embodiment, the included angle between the first side wall 43 and the second side wall 44 is 5°, and 36 cooling cavities are circumferentially arranged in one cooling member 6. The heat dissipation member 5 is a heat dissipation fin, and the heat dissipation fin is an annular circular plate perpendicular to the axis of the brake disc 3. In this embodiment, the fin thickness is 1 mm and the fin pitch is 1 mm.

[0038] A brake disc cooler disclosed by the present invention utilizes the boiling cooling technology of a phase change working medium. The liquid working medium boils when heated on the boiling surface, and the vaporized working medium flows towards the condensation surface under the action of pressure and condenses into a liquid on the condensation surface. The liquid working medium flows back to the boiling surface under the action of centrifugal force. Due to continuous boiling and condensation in the cooler, the heat of the brake disc is efficiently transferred to the ambient air, thereby producing a good cooling effect on the brake disc.

[0039] The present invention makes full use of the latent heat of vaporization during the boiling of the working medium to absorb the heat generated by the brake disc, greatly improving the heat transfer capacity of the brake disc cooler and enhancing the heat dissipation effect of the brake disc.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brake disc cooler, characterized in that, Comprising: A first plate member (1) and a second plate member (2), the first plate member (1) being in close contact with the brake disc (3); There is a cooling cavity (4) between the first plate member (1) and the second plate member (2), and there is a phase change working fluid in the cooling cavity (4); The cooling cavity (4) has a boiling surface (41) and a condensation surface (42). The boiling surface (41) is the inner side surface of the first plate member (1) in the cooling cavity. The condensation surface (42) is arranged between the first plate member (1) and the second plate member (2). The distance from the point on the condensation surface (42) close to the first plate member (1) to the axis of the brake disc (3) is farther than the distance from the point on the condensation surface (42) close to the second plate member (2) to the axis of the brake disc (3). A heat dissipation member (5) is provided on the side of the condensation surface (42) facing away from the cooling cavity; The brake disc (3) includes two outer side surfaces (31) and two inner side surfaces (32). There are two first plate members (1) in total, and the two first plate members (1) are respectively in close contact with different inner side surfaces (32). There are two second plate members (2) in total, and the two second plate members (2) are in close contact with each other; A disc-shaped cooling member (6) is provided between the first plate member (1) and the second plate member (2). There are multiple cooling cavities (4), and the multiple cooling cavities (4) are circumferentially arranged in the cooling member (6); The inner side surface of the cooling member (6) is a conical surface, and the heat dissipation member (5) is provided on the conical surface.

2. The brake disc cooler according to claim 1, characterized in that, The condensation surface (42) is a part of a conical surface, and the included angle between the generatrix of the conical surface and the axis of the brake disc is 60° - 80°; The cooling cavity (4) further includes an auxiliary surface (45), and the auxiliary surface (45) is arranged between the first plate member (1) and the second plate member (2) and is parallel to the condensation surface (42).

3. The brake disc cooler according to claim 1, characterized in that, The cooling cavity (4) has a first side wall (43) and a second side wall (44). The plane where the first side wall (43) is located and the plane where the second side wall (44) is located intersect at the axis of the cooling member (6). The included angle between the first side wall (43) and the second side wall (44) is 2° - 10°.

4. The brake disc cooler according to claim 1, characterized in that, The heat dissipation member (5) is a heat dissipation fin, and the heat dissipation fin is an annular disc perpendicular to the axis of the brake disc (3).

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