New heat pipe air duct brake disc

Abstract

A novel heat pipe type air duct brake disc comprises an inner and outer brake discs, blades and a wheel hub. The inner and outer brake discs are a pair of coaxial and same outer diameter lamellar rings with a coaxial lamellar annular space inside; the annular space is provided with a plurality of pressure bearing parts which are evenly distributed around the axis and do not divide the annular space into a plurality of independent spaces; the blades are hollow blades evenly distributed around the axis between the inner and outer brake discs, and are connected with the inner and outer brake discs to form a hollow impeller with a closed integral chamber inside the shell and a plurality of cooling air ducts outside the shell; the blades can be provided with a working medium flow-assisting arch at the maximum rotation diameter; the specific positions of the inner and outer brake discs can be provided with outwardly stretched ventilation holes evenly distributed around the axis; the inner surface of the outer side wall of the inner and outer brake discs can be provided with a capillary wall surface; under the premise of not affecting the ventilation of the impeller, one or two of the inner and outer brake discs are coaxially connected to the wheel hub, and the integral chamber is filled with working medium and a vacuum is formed, so as to obtain the novel heat pipe type air duct brake disc described in the present invention. The patent of this invention creatively combines the heat pipe and the air duct type brake disc, which can significantly improve the heat dissipation capacity of the air duct type brake disc and provide strong protection for driving safety.

Description

Technical Field

[0001] The invention patent discloses a novel heat pipe air duct brake disc, belonging to the technical field of enhanced heat transfer. Background Art

[0002] The brake disc is an essential component of the automotive disc brake system. It is fixed on the wheel hub of the vehicle and rotates coaxially with the wheel. The quality of the vehicle's braking performance directly affects its driving safety. During braking, the brake pad squeezes the brake disc under the push of the clamp piston, and the friction between the brake pad and the brake disc reduces the wheel speed to achieve the purpose of braking the motor vehicle. Especially for large-scale load-bearing vehicles, due to the large inertia, the friction between the brake and the brake disc is very intense, and the large amount of friction heat generated will cause the temperature of the brake system to rise sharply. When the temperature rises to a certain value, the excessive temperature will cause the brake pad and brake disc to produce thermal decay and deformation. In addition, it may also cause the brake oil to vaporize, thereby affecting the braking effect or even causing the brake to fail. Therefore, good heat dissipation of the brake disc is an important guarantee for the safe operation of the brake system. There are two types of current brake discs, one is a single disc, and the other is a duct disc, also called a ventilation disc or a double disc. Since the double disc has a structure similar to a fan impeller, it can produce a ventilation effect when rotating, and its heat dissipation capacity is better than that of a single disc. So far, the double disc has become the mainstream disc type of brake disc. At present, there is a kind of brake disc on the market that has been punched and scored, the purpose of which is also to further improve the heat dissipation capacity.

[0003] Based on this, the engineering and technical community has been exploring the enhanced heat dissipation of brake discs. The following are the relevant patents that have been published:

[0004] Chinese patent 201611198591.3 proposes a monolithic brake disc with an embedded self-excited oscillating flow heat pipe, which is characterized in that an annular open groove with a rectangular cross-section is excavated on the outer periphery of the brake disc, a number of oscillating heat pipes are evenly inserted into the open groove, and an impeller is arranged outside the heat pipe, and the impeller and the self-excited oscillating heat pipe are connected by rotation. Analysis shows that there are several problems with this method: ① Since the heat pipe is in a horizontal position during actual operation, the working fluid reflux capacity is not strong, which directly affects the heat transfer performance of the heat pipe. ② The thickness of a monolithic brake disc is generally small, resulting in very short cold and hot ends, which is not conducive to heat dissipation. ③ The heat pipe is nested between the open grooves of the brake disc, and there is contact thermal resistance on the nesting surface, which is not conducive to heat transfer. ④ The large number of heat pipes is prone to failure, resulting in uneven temperature on the surface of the brake disc. ⑤ The heat pipe is equipped with a cavity-shaped grid and fixed particles, and the structure is complex and difficult to process.

[0005] Chinese patent 201620613719.7 proposes a single-piece brake disc, which is characterized in that a number of independent axisymmetric radial grooves are provided inside the brake disc, and the grooves are vacuumed and filled with liquid to form a series of independent built-in heat pipes. In theory, this patent can significantly improve the heat dissipation efficiency of the brake disc, but it is not feasible in practice for the following reasons: ① In practice, the brake pads have basically covered the radius of both sides of the brake disc, so that the radial grooves can only become evaporation sections, and the condensation section does not actually exist or is difficult to exist, making it difficult or impossible for the working fluid to condense, and the heat transfer performance of the heat pipe cannot be exerted, which seriously affects the heat dissipation efficiency of the brake disc. ② Affected by centrifugal force, the liquid working fluid can only be distributed on the outside of the groove, and other parts of the groove are "dry-burned" due to lack of liquid, which can easily lead to thermal decay of related parts of the brake disc. ③ Many independent heat pipes are prone to performance differences or failures, resulting in uneven temperature and braking force on the brake disc surface.

[0006] Chinese patent 200910211055.6 proposes a heat pipe heat transfer disc brake, in which a heat pipe heat exchanger is added inside the brake disc for heat dissipation of a single disc. It is characterized in that an inner and outer ring are separated from the surface of the brake disc, the outer ring is the contact area with the brake pad, and the inner ring is the non-contact area. An annular evaporation groove is provided inside the outer ring, and an annular condensation groove is provided inside the inner ring. A flow groove is provided along the radial direction of the brake disc to connect the evaporation groove and the condensation groove, and then an array of annular small holes are provided to connect the adjacent flow grooves, thereby forming an integral built-in heat pipe. Analysis shows that the patent has the following problems: ① In reality, the brake pad basically covers the radial diameter change of the brake disc. From the perspective of heat transfer, the evaporation groove and the condensation groove are objectively the evaporation end, and the condensation end does not actually exist or is difficult to exist, so the heat transfer function of the heat pipe cannot be exerted. If the condensation end is forcibly separated, in order to ensure that the braking force is not reduced,

[0007] The diameter of the brake disc must be increased, making the brake disc undesirable in terms of cost, weight and space. ② Under the action of centrifugal force, the liquid working fluid can only be distributed on the outer edge of the annular evaporation tank, and other radial parts of the evaporation tank are in a "dry burning" state due to lack of liquid, which makes the relevant parts of the brake disc prone to thermal decay and other phenomena; ③ The evaporation and condensation ends are hollow and unsupported, which is prone to compression deformation.

[0008] Chinese patent 201420609520.8 proposes a brake disc with a simple structure. Its feature is that the inside of a single disc is hollowed out to form an annular cavity, which is then vacuumed and filled with liquid to form an integral built-in heat pipe. Analysis shows that its heat transfer process and existing deficiencies are similar to those of patent 200910211055.6.

[0009] Chinese patent 201510949174.7 proposes a heat pipe type brake disc cooling device, which also proposes a structure for heat dissipation of a single disc. Its structure is similar to patent 201420609520.8. The difference is that a cylindrical condensation end is vertically led outward near the wheel hub, which means that the patent is specially set up with an extended cold end, which is more conducive to the heat dissipation of the brake disc. The heat pipe is a variant of the built-in heat pipe. Analysis shows that there are the following deficiencies: ① The condensate flows back to the hot end by centrifugal action. Under this structure, it is difficult for the condensate to be evenly distributed on the evaporation wall surface of the evaporation end, so there may be a problem of local "dry burning" at the evaporation end; ② The hollow unsupported structure of the evaporation end is prone to compression deformation; ③ The air flow of the inner cylinder of the cold end of the cylindrical structure is weak, which is not conducive to air convection cooling; ④ The length of the cold end of the cylinder will inevitably affect the design of the vehicle wheelbase.

[0010] Chinese patent 201410436239.3 proposes a heat pipe temperature equalization and heat dissipation device for vehicle brakes. The patent involves a double disc, which is characterized in that the straight pipe sections of the array straight heat pipe or U-shaped heat pipe are semi-embedded in the inner side of the air duct of the double brake disc. In order to combine the heat pipe well, an arc-shaped heat pipe groove is opened on the inner side of the air duct so that the heat pipe array can be fixed on the brake disc in a surface contact manner through the heat pipe groove. Analysis shows that this patent also has the following problems: ① The surface contact between the heat pipe and the heat pipe groove has contact thermal resistance, which is not conducive to heat transfer. ② The large number of independent heat pipes in the array will undoubtedly increase the failure rate and installation difficulty of the heat pipe. ③ Like the aforementioned patents 201620613719.7, 200910211055.6, and 201420609520.8, the heat pipe has the problem of "dry burning" at the evaporation end and no cold end. ④ Many heat pipes, especially finned heat pipes, are inserted into the ventilation duct, which is not conducive to the ventilation of the brake disc air duct, and thus is not conducive to heat dissipation and cooling.

[0011] In summary, the current heat pipe cooling technology for brake discs is immature and the effect is not ideal. Through heat transfer analysis, it is found that there are the following five common problems, which affect the heat pipe cooling efficiency and braking effect of the brake disc.

[0012] ① The heat dissipation of brake disc heat pipes is currently mostly concentrated on single-piece discs, while the mainstream air duct discs (also known as ventilated discs or double-piece discs) are rarely studied.

[0013] ② The built-in heat pipe lacks a condensation end or the condensation end is arranged unreasonably, resulting in poor condensation effect.

[0014] ③The evaporation end of the built-in heat pipe is prone to local "dry burning" and pressure deformation.

[0015] ④ Inserted (or embedded) heat pipes have large contact thermal resistance, which affects heat transfer.

[0016] ⑤ There are a large number of independent heat pipes, which are prone to heat pipe failure and performance differences, resulting in uneven brake disc temperature and affecting the braking effect.

[0017] Despite this, introducing heat pipes is still a good idea, but the current solutions and structures still have many deficiencies in heat transfer. Therefore, how to organically integrate heat pipes with brake discs, especially double-disc discs (also known as ventilation discs or duct discs), so as to achieve good heat dissipation of brake discs, is an important issue that needs to be solved urgently. Summary of the invention

[0018] The purpose of this patent is to overcome the shortcomings of the existing air duct disc (also known as ventilation disc or double-plate disc) in heat dissipation and cooling, and to provide a new type of heat pipe air duct brake disc that can organically combine heat pipe heat dissipation technology, so that its structure is more reasonable and the heat dissipation capacity is greatly improved compared with the existing technical solutions.

[0019] The novel heat pipe air duct brake disc described in the present invention is realized by the following scheme:

[0020] The novel heat pipe type air duct brake disc described in the present invention comprises an inner brake disc 1, an outer brake disc 3, blades 6 and a wheel hub 5. The inner and outer brake discs 1 and 3 are a pair of coaxial and coaxial lamellar rings with a coaxial lamellar annular space 10; a plurality of pressure bearing members 7 evenly distributed around the axis are provided in the annular space 10, but the pressure bearing members 7 do not divide the annular space 10 into a plurality of independent spaces; the blades 6 are hollow blades evenly distributed around the axis between the inner and outer brake discs 1 and 3, and are connected with the inner and outer brake discs 1 and 3 to form a hollow impeller 18 with a closed integral chamber 17 in a shell and a plurality of cooling air ducts 2 outside the shell; under the premise of not affecting the normal ventilation of the impeller 18, one or two of the inner and outer brake discs 1 and 3 are coaxially connected to the wheel hub 5 through the inner circle, and then the integral chamber 17 is filled with a working medium 14 and a vacuum is formed, so as to obtain the novel heat pipe type air duct brake disc described in the present invention.

[0021] The patented new heat pipe air duct brake disc of the present invention has a high temperature heat storage ring 22 corresponding to the annular friction surface where the inner and outer brake discs 1 and 3 contact the brake pads. The high temperature heat storage ring 22 is the hot end 19 of the patented new heat pipe air duct brake disc, and the rest of the brake disc is the cold end. The patented new heat pipe air duct brake disc of the present invention has no intersection between the pressure bearing member 7 and the outlet of the working fluid channel of the blade 6 to prevent the working fluid channel 8 from being blocked.

[0022] The patented new heat pipe air duct brake disc of the present invention, the blade 6 can be provided with a working fluid flow-aiding arch 15 at its maximum rotation diameter, the working fluid flow-aiding arch 15 is a blade edge arranged at the maximum rotation diameter of the blade 6, which has an axial direction and is concave toward the axis, and the concave depth e ranges from 0 to 20 mm. This structure can eliminate or reduce the amount of working fluid accumulation at the maximum rotation diameter of the blade 6 when the blade 6 rotates, and promote the accumulated fluid to flow to the hot end.

[0023] The patented new heat pipe air duct brake disc of the present invention, the wall where the inner and outer brake discs contact the brake pads is set as wall II 21, the inner surface of wall II 21 is set as capillary wall 13, the working fluid 14 can form moisture on the capillary wall 13, so that the inner wall of the hot end is covered with a layer of liquid film 16, so that the working fluid evaporates more evenly and local dry burning can be prevented at the hot end.

[0024] The patented new heat pipe air duct brake disc of the present invention, the pressure-bearing part 7 is formed by one or a group of pseudo-prism entities, and the distances between the pressure-bearing part 7 and the radial inner and outer edges of the annular space 10 are a and b respectively, wherein a ranges from 0 to 20 mm, and b ranges from 2 to 20 mm. The bottom surface shape of the pressure-bearing part 7 can be a single or a group of parallelograms, trapezoids, polygons, circles, ellipses, arcs, wing shapes, etc.

[0025] In the patented new heat pipe air duct brake disc of the present invention, the pressure bearing member 7 is combined with the two inner flat walls of the inner and outer brake discs 1 and 3 to bear the pressure, ensuring that the inner and outer brake discs are not deformed under pressure. This is the first pressure bearing method; in the patented new heat pipe air duct brake disc of the present invention, the pressure bearing member 7 can also be composed of two or two groups of pseudo-prism entities with fit-fitting inclined sides, wherein all the pseudo-prism entities on the same side of the pressure bearing member 7 are combined with a certain inner flat wall, and all the pseudo-prism entities on the other side of the pressure bearing member 7 are combined with another inner flat wall, and this combination is conducive to bearing pressure. The bottom surface shape of the pressure bearing member 7 can be two or two groups of fit parallelograms, trapezoids, polygons, arcs, etc. When the inner and outer brake discs 1 and 3 are cut open along their inner and outer circumferences, each disc can be split into two parts, each with half of the pseudo-prism entity, and the two parts can be rotated and welded to form the inner and outer brake discs 1 and 3 that can bear pressure. This is the second pressure bearing method.

[0026] The patented new heat pipe air duct brake disc of the present invention, for the new heat pipe air duct brake disc of the first pressure-bearing mode, can be provided with an outward-stretching ventilation hole 9 evenly distributed around the axis and penetrating the inner and outer brake discs 1 and 3 at the appropriate position of the pressure-bearing member 7. The ventilation hole 9 is not connected with the annular space 10 in any way. The so-called outward-stretching performance is that the radius of its air outlet position is greater than or equal to the radius of the air inlet position, and the air outlet position is arranged in the cooling air duct, and the ventilation hole and the rotating shaft form an angle θ, and θ ranges from 0 to 60°. When θ>0°, the air outlet radius and linear speed of the rotating ventilation hole are large, and a static pressure difference will be generated between the air inlet and outlet positions. Under the impetus of the static pressure difference, the air flow of the ventilation hole and the cooling air duct is strengthened, thereby further strengthening the heat dissipation capacity of the brake disc. For the new heat pipe air duct brake disc of the second pressure-bearing mode, no ventilation hole is provided.

[0027] The patented new heat pipe air duct brake disc of the present invention, the installation angle of the blade 6 can be backward curved, radial, forward curved. The wall thickness of the blade 6 is 1.5-10mm, and the distance between the blade 6 and the inner and outer edges of the inner and outer brake discs 1 and 3 is c and r, and the value range of c and r is 0-20mm. The cross-sectional shape of the blade 6 perpendicular to the rotation axis is roughly wing-shaped, arc-shaped, straight plate-shaped, crescent-shaped, etc.

[0028] The patented new heat pipe air duct brake disc of the present invention has a thickness and wall thickness of the inner and outer brake discs 1 and 3 of 10 to 25 mm and 1.5 to 15.0 mm respectively, and the wall thickness of the same wall surface is the same, and the wall thickness of different walls may be different. The spacing between the inner and outer brake discs 1 and 3 is 4 to 25 mm.

[0029] The patented new heat pipe air duct brake disc of the present invention has a volume filling rate of 5% to 50% of the working fluid.

[0030] The patented new heat pipe type air duct brake disc of the present invention, the working medium 14 is a mixture of one or more of deionized distilled water, toluene, naphthalene, biphenyl, thermal conductivity, mercury or potassium, sodium, etc.; the main body material of the new heat pipe type air duct brake disc can be carbon fiber ceramics, composite materials, metals and their alloys, etc.

[0031] Technical effect of the patent of this invention

[0032] The new heat pipe air duct brake disc proposed in the present invention is mainly used for heat dissipation of air duct disc (also called ventilated disc or double disc) in disc brakes, and has the following new working principle and good heat dissipation effect.

[0033] The novel heat pipe type duct brake disc is composed of an inner brake disc, an outer brake disc, blades and a hub, etc. Its appearance is very similar to the current duct disc brake disc, but its interior has undergone fundamental changes, from the original metal solid duct disc to a heat pipe type duct brake disc with a built-in integral heat pipe, thereby significantly improving its heat dissipation performance.

[0034] With reference to the above content, it can be known that the heat pipe air duct brake disc has the following key structure and the new working principle generated thereby.

[0035] Key structure: The inner and outer brake discs and blades are all hollow structures, and the hollow blades evenly distributed around the axis between the hollow inner and outer brake discs penetrate the three to form a hollow impeller with a closed overall chamber inside the shell and a number of cooling air ducts evenly distributed around the axis outside the shell; pressure-bearing parts evenly distributed around the axis are arranged inside the hollow inner and outer brake discs, and the pressure-bearing parts do not separate the hollow annular space of the inner and outer brake discs into a number of independent spaces; one or two of the inner and outer brake discs of the impeller are coaxially connected to the wheel hub through the inner circle; in order to prevent the new heat pipe type air duct The hot end of the brake disc is "dry-burned", and a capillary wall is set on the inner surface of its II wall; in order to prevent liquid accumulation in the hollow of the blade at its maximum rotation diameter due to centrifugal force when the heat pipe is working, a flow-aiding arch running along the axis and concave toward the axis can be set at the maximum rotation diameter of the hollow of the blade; in order to further enhance the cooling, for the inner and outer brake discs of the first pressure-bearing method, outward-stretched ventilation holes that can penetrate the inner and outer brake discs can be set at appropriate positions of the pressure-bearing parts, and the radius of the air outlet position is greater than or equal to the radius of the air inlet position, and the air outlet position is set in the cooling air duct.

[0036] Working principle and heat dissipation effect:

[0037] During the continuous braking process, frictional heat generation will make the annular hot end a high-temperature heat storage ring. At this time, the following heat transfer process will occur in the heat pipe: the working fluid liquid circle gathered at the hollow maximum rotation diameter of the inner and outer brake discs under the centrifugal effect absorbs heat and evaporates from the annular hot end. Driven by the internal pressure of the heat pipe, the steam leaves the hot end evaporation surface and transfers to all other spaces. During this period, it condenses and releases heat on the inner surface of the blade and other inner surfaces of the inner and outer brake discs except the annular hot end. The released condensation heat is carried away by the air flow in the cooling air duct of the hollow impeller and outside the inner and outer brake discs. In particular, the heat dissipation capacity is particularly strong in the cooling air duct due to the abnormally high air flow rate. The condensed liquid on each inner surface flows back to the liquid circle of the inner and outer brake discs along the inner surface itself under the action of centrifugal force, thus completing a cycle of the working fluid. In this way, over and over again, the heat generated by the brakes is continuously transferred to the environment, so that the new heat pipe air duct disc and its brake pads are always controlled at a lower temperature, thereby avoiding or delaying thermal degradation of the materials and ensuring the braking safety of the vehicle. It should be noted that there are three links related to heat transfer efficiency in the above process that must be pointed out, namely: ① The capillary wall surface set on the inner surface of the inner and outer brake disc II wall allows the working fluid to form wetting on it, so that the inner wall of the hot end is covered with a layer of liquid film, and the working fluid can evaporate more evenly, thereby preventing the hot end from being overheated due to local "dry burning"; ② The flow-aiding arch set on the blade can reduce or avoid the accumulation of liquid on the inner side of the maximum rotation diameter of the blade, and use the centrifugal effect to push the accumulated liquid to flow to the hot end, so as to give full play to the cooling effect of the blade and improve the working fluid circulation efficiency inside the heat pipe, and enhance the heat transfer performance of the heat pipe body; ③ The outward-stretched ventilation holes set on the inner and outer discs, when θ>0°, the air outlet position radius and linear velocity of the rotating ventilation holes are large, which can generate a pressure difference at both ends of the ventilation holes. Driven by the pressure difference, the air will generate a directional flow in the ventilation holes, which can not only enhance the heat dissipation of the ventilation holes themselves but also increase the air volume and speed of the cooling air duct, which is also of great benefit to enhance the heat dissipation of the cooling air duct.

[0038] Compared with the current patents with built-in heat pipes, the special heat pipe structure of this patent greatly increases the cold end condensation area of ​​the new heat pipe air duct brake disc, and its condensation area includes the I wall surface and blade wall surface of the inner and outer brake discs, which effectively solves the defects of unreasonable cold end layout and insufficient condensation area of ​​the built-in heat pipe. On this basis, coupled with the setting of pressure-bearing parts, flow-aiding arches, and outward ventilation holes, the new heat pipe air duct brake disc has been greatly improved in heat transfer, temperature uniformity, and reliability, solving the common problems existing in the current air duct brake disc heat pipe heat dissipation technology.

[0039] In addition, the second pressure-bearing method is equivalent to proposing a method for manufacturing the brake disc, which decomposes the brake disc into two annular halves, each of which carries the same number of inclined pseudo-prism entities evenly distributed around the axis. If the two halves are interlocked and rotated, the pseudo-prism entities they carry can be interlocked, and the two halves will be combined into a whole that cannot be separated by themselves after being interlocked. The two combined halves are welded along the inner and outer circumferential seams to obtain the inner and outer discs. Therefore, the brake disc of the second pressure-bearing method can be manufactured by processing the above two halves, which provides another option for the manufacturing process of the heat pipe air duct brake disc.

[0040] To sum up, the new type of heat pipe type duct brake disc proposed in the patent of this invention overcomes the structural and functional deficiencies of the existing duct type brake disc, creatively and organically integrates the heat pipe technology into the heat dissipation of the duct type brake disc, achieves a far better technical effect than the existing duct type brake disc, improves driving safety, and provides a new and better method and means for the design and manufacture of duct type brake discs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Attached Figure 1 Appearance diagram of embodiment 1;

[0042] Attached Figure 2 Embodiment 1 Sectional view Figure 1 ;

[0043] Attached Figure 3 Embodiment 1 Sectional view Figure 2 ;

[0044] Attached Figure 4 Appearance diagram of embodiment 2;

[0045] Attached Figure 5 Example 2 Sectional View Figure 1 ;

[0046] Attached Figure 6 Example 2 Sectional View Figure 2 ;

[0047] Attached Figure 7 Appearance diagram of embodiment 3;

[0048] Attached Figure 8 Example 3 Sectional View Figure 1 ;

[0049] Attached Fig. 9 Example 3 Sectional View Figure 2 ;

[0050] Attached Fig.10 Appearance diagram of embodiment 4;

[0051] Attached Fig.11 Embodiment 4 Sectional view Figure 1;

[0052] Attached Fig.12 Embodiment 4 Sectional view Figure 2 ;

[0053] Attached Fig.13 Working principle diagram;

[0054] Attached Fig.14 Diagram of the outer contour of the pressure-bearing parts and the types of ventilation holes;

[0055] Attached Fig.15 Working fluid channel type diagram;

[0056] Attached Fig.16 Cross-sectional view of the flow-aiding arch.

[0057] In the figure: 1-inner brake disc, 2-cooling air duct, 3-outer brake disc, 4-mounting hole, 5-wheel hub, 6-blade, 7-pressure bearing part, 8-working fluid channel, 9-ventilation hole, 10-annular space, 11-outer edge of brake disc, 12-inner edge of brake disc, 13-capillary wall, 14-working fluid, 15-flow-aiding arch, 16-liquid film, 17-integral chamber, 18-impeller, 19-hot end, 20-I wall, 21-II wall, 22-high-temperature heat storage ring.

[0058] The following describes various embodiments in conjunction with the accompanying drawings. The embodiments are specific examples of implementation under the general content of the present invention, which are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the content of the present invention, various modifications made by those skilled in the art to the present invention also fall within the scope of the claims attached to the present invention.

[0059] Embodiment 1:

[0060] See attached Figure 1 , 2, 3, 13, 14a, 15c, 16. The novel heat pipe air duct brake disc comprises an inner brake disc 1, an outer brake disc 3, blades 6, a wheel hub 5 and other structures. The inner and outer brake discs 1, 3 are a pair of coaxial, same outer diameter, same thickness, and a coaxial lamellar annular space 10 is provided inside; a plurality of pressure-bearing parts 7 evenly distributed around the axis are provided in the annular space 10, but the pressure-bearing parts 7 do not divide the annular space 10 into a plurality of independent spaces; the blades 6 are hollow blades evenly distributed around the axis between the inner and outer brake discs 1, 3, and are connected with the inner and outer brake discs 1, 3 to form a hollow impeller 18 with a closed integral chamber 17 in a shell and a plurality of cooling air ducts 2 outside the shell; the blades 6 are provided with a working medium flow-assisting arch 15 at their maximum rotation diameter; an outwardly stretched ventilation hole 9 evenly distributed around the axis that can penetrate the inner and outer brake discs 1, 3 is provided at an appropriate position of the pressure-bearing part 7, and the ventilation hole is not connected with the annular space in any way; the wall of the inner and outer brake discs 1, 3 in contact with the brake pad is set as the II wall 21, and the inner surface of the II wall 21 is set as the capillary wall 13, such as Fig.13 As shown; under the premise of not affecting the normal ventilation of the impeller 18, the outer brake disc 3 is coaxially connected to the hub 5 through the inner circle, and the overall chamber 17 is filled with the working medium 14 and a vacuum is formed, thereby obtaining the new heat pipe air duct brake disc described in the patent of the present invention.

[0061] In this embodiment, the portion corresponding to the annular friction surface of the inner and outer brake discs 1, 3 in contact with the brake pad is the hot end 19 of the novel heat pipe air duct brake disc, and the rest of the brake disc is the cold end.

[0062] In this embodiment, the pressure bearing member 7 does not intersect with the outlet of the working medium channel 8 of the blade 6 to prevent the working medium channel 8 from being blocked. The structure of the flow-assisting arch 15 is as follows: Fig.16 As shown, the recess depth e is 8 mm.

[0063] In this embodiment, the capillary wall surface 13 can form wetting on the capillary wall surface together with the working medium 14, so that the inner wall of the hot end is covered with a layer of liquid film 16.

[0064] In this embodiment, the pressure-bearing member 7 conforms to the first pressure-bearing mode, and the distances between the pressure-bearing member 7 and the radial inner and outer edges of the annular space 10 are a=5mm and b=5mm respectively. The bottom surface of the pressure-bearing member 7 is a rectangular shape, such as Fig.14 In this embodiment, a ventilation hole 9 is provided, and the rotation axis angle θ thereof is 45°.

[0065] In this embodiment, the installation angle of the blade 6 is radial, the wall thickness of the blade 6 is 3 mm, and the distances c and r between the inner and outer edges of the inner and outer brake discs 1 and 3 are both 15 mm. Fig.16The cross-sectional shape of the blade 6 perpendicular to the rotation axis is generally a straight plate shape. Fig.15 c.

[0066] In this embodiment, the thickness of the inner and outer brake discs 1, 3 are both 14 mm, the thickness of wall I is 4 mm, the thickness of wall II is 6 mm, and the distance between the inner and outer brake discs 1, 3 is 10 mm.

[0067] In this embodiment, the volume filling rate of the working medium 14 is 30%.

[0068] In this embodiment, the working medium 14 is deionized distilled water, and the body material is gray cast iron 250°

[0069] Embodiment 2:

[0070] See attached Figure 4 , 5 , 6, 13, 14e, 15a, 16. The novel heat pipe air duct brake disc comprises an inner brake disc 1, an outer brake disc 3, blades 6, a wheel hub 5 and other structures. The inner and outer brake discs 1, 3 are a pair of coaxial, same outer diameter, same thickness, and a coaxial lamellar annular space 10 is provided inside; a plurality of pressure-bearing parts 7 evenly distributed around the axis are provided in the annular space 10, but the pressure-bearing parts 7 do not divide the annular space 10 into a plurality of independent spaces; the blades 6 are hollow blades evenly distributed around the axis between the inner and outer brake discs 1, 3, and are connected with the inner and outer brake discs 1, 3 to form a hollow impeller 18 with a closed integral chamber 17 in a shell and a plurality of cooling air ducts 2 outside the shell; the blades 6 are provided with a working medium flow-assisting arch 15 at their maximum rotation diameter; an outwardly stretched ventilation hole 9 evenly distributed around the axis that can penetrate the inner and outer brake discs 1, 3 is provided at an appropriate position of the pressure-bearing part 7, and the ventilation hole is not connected with the annular space in any way; the wall of the inner and outer brake discs 1, 3 in contact with the brake pad is set as the II wall 21, and the inner surface of the II wall 21 is set as the capillary wall 13, such as Fig.13 Under the premise of not affecting the normal ventilation of the impeller 18, the inner brake disc 1 is coaxially connected to the hub 5 through the inner circle, and the overall chamber 17 is filled with the working fluid 14 and a vacuum is formed, thereby obtaining the new heat pipe air duct brake disc described in the patent of the present invention.

[0071] In this embodiment, the portion corresponding to the annular friction surface of the inner and outer brake discs 1, 3 in contact with the brake pad is the hot end 19 of the novel heat pipe air duct brake disc, and the rest of the brake disc is the cold end.

[0072] In this embodiment, the pressure bearing member 7 does not intersect with the outlet of the working medium channel 8 of the blade 6 to prevent the working medium channel 8 from being blocked. Fig.16 As shown, the recess depth e is 15 mm.

[0073] In this embodiment, the capillary wall surface 13 can form wetting on the capillary wall surface together with the working medium 14, so that the inner wall of the hot end is covered with a layer of liquid film 16.

[0074] In this embodiment, the pressure-bearing member 7 conforms to the first pressure-bearing mode, and the distances between the pressure-bearing member 7 and the radial inner and outer edges of the annular space 10 are a=10 mm and b=10 mm respectively. The bottom surface of the pressure-bearing member 7 is a trapezoidal shape, such as Fig.14 e.

[0075] In this embodiment, a ventilation hole 9 is provided, and the rotation axis angle θ thereof is 30°.

[0076] In this embodiment, the installation angle of the blade 6 is backward curved, the wall thickness of the blade 6 is 2 mm, and the distances c and r between the blade 6 and the inner and outer edges of the inner and outer brake discs 1 and 3 are both 10 mm. Fig.16 The cross-sectional shape of the blade 6 perpendicular to the rotation axis is generally arc-shaped, such as Fig.15 a.

[0077] In this embodiment, the thickness of the inner and outer brake discs 1, 3 are both 20 mm, the thickness of wall I is 6 mm, the thickness of wall II is 8 mm, and the distance between the inner and outer brake discs 1, 3 is 15 mm.

[0078] In this embodiment, the volume filling rate of the working medium 14 is 25%.

[0079] In this embodiment, the working medium 14 is toluene, and the body material is aluminum alloy.

[0080] Embodiment three:

[0081] See attached Figure 7 , 8, 9, 13, 14c, 15b, 16. The novel heat pipe air duct brake disc comprises an inner brake disc 1, an outer brake disc 3, blades 6, a wheel hub 5 and other structures. The inner and outer brake discs 1, 3 are a pair of coaxial, same outer diameter, same thickness, and a coaxial lamellar annular space 10 is provided inside; a plurality of pressure-bearing parts 7 evenly distributed around the axis are provided in the annular space 10, but the pressure-bearing parts 7 do not divide the annular space 10 into a plurality of independent spaces; the blades 6 are hollow blades evenly distributed around the axis between the inner and outer brake discs 1, 3, and are connected with the inner and outer brake discs 1, 3 to form a hollow impeller 18 with a closed integral chamber 17 in a shell and a plurality of cooling air ducts 2 outside the shell; the blades 6 are provided with a working medium flow-assisting arch 15 at their maximum rotation diameter; an outwardly stretched ventilation hole 9 evenly distributed around the axis that can penetrate the inner and outer brake discs 1, 3 is provided at an appropriate position of the pressure-bearing part 7, and the ventilation hole is not connected with the annular space in any way; the wall of the inner and outer brake discs 1, 3 in contact with the brake pad is set as the II wall 21, and the inner surface of the II wall 21 is set as the capillary wall 13, such as Fig.13 As shown; under the premise of not affecting the normal ventilation of the impeller 18, the inner and outer brake discs 1, 3 are coaxially connected to the hub 5 through the inner circle at the same time, and the overall chamber 17 is filled with the working medium 14 and a vacuum is formed, so as to obtain the new heat pipe air duct brake disc described in the patent of the present invention.

[0082] In this embodiment, the portion corresponding to the annular friction surface of the inner and outer brake discs 1, 3 in contact with the brake pad is the hot end 19 of the novel heat pipe air duct brake disc, and the rest of the brake disc is the cold end.

[0083] In this embodiment, the pressure-bearing member 7 has no intersection with the outlet of the working medium passage 8 of the blade 6 to prevent the working medium passage 8 from being blocked.

[0084] In this embodiment, the structure of the flow-assisting arch 15 is as follows: Fig.16 , the depression depth e is 5mm.

[0085] In this embodiment, the pressure-bearing member 7 conforms to the first pressure-bearing mode, and the distances between the pressure-bearing member 7 and the radial inner and outer edges of the annular space 10 are a=8mm and b=8mm respectively. The bottom surface of the pressure-bearing member 7 is an arc shape, such as Fig.14 c.

[0086] In this embodiment, a ventilation hole 9 is provided, and the rotation axis angle θ is 20°.

[0087] In this embodiment, the installation angle of the blade 6 is forward curved, the wall thickness of the blade 6 is 5 mm, and the distances c and r between the inner and outer edges of the inner and outer brake discs 1 and 3 are both 12 mm. Fig.16 The cross-sectional shape of the blade 6 perpendicular to the rotation axis is roughly wing-shaped. Fig.15 b.

[0088] In this embodiment, the thickness of the inner and outer brake discs 1, 3 are both 16 mm, the thickness of wall I is 3 mm, the thickness of wall II is 5 mm, and the spacing between the inner and outer brake discs 1, 3 is 18 mm.

[0089] In this embodiment, the volume filling rate of the working medium 14 is 20%.

[0090] In this embodiment, the working medium 14 is naphthalene, and the body material is magnesium alloy.

[0091] Embodiment 4:

[0092] See attached Fig.10 , 11 , 12, 13, 14i, 15c, 16. The novel heat pipe air duct brake disc comprises an inner brake disc 1, an outer brake disc 3, blades 6, a wheel hub 5 and other structures. The inner and outer brake discs are a pair of coaxial, same outer diameter, same thickness, and a coaxial lamellar annular space 10 is provided inside; a plurality of pressure-bearing parts 7 evenly distributed around the axis are provided in the annular space 10; the pressure-bearing parts 7 do not divide the annular space 10 into a plurality of independent spaces; the blades 6 are hollow blades evenly distributed around the axis between the inner and outer brake discs 1, 3, and are connected with the inner and outer brake discs 1, 3 to form a hollow impeller 18 with a closed integral chamber 17 inside the shell and a plurality of cooling air ducts 2 outside the shell; the blades 6 are provided with a working medium flow-assisting arch 15 at their maximum rotation diameter; the wall of the inner and outer brake discs 1, 3 in contact with the brake pads is set as the II wall 21, and the inner surface of the II wall 21 is set as the capillary wall 13, such as Fig.13 Under the premise of not affecting the ventilation of the impeller 18, the outer brake disc 3 is coaxially connected to the wheel hub 5, and the overall chamber 17 is filled with the working medium 14 and a vacuum is formed, so as to obtain the heat pipe air duct brake disc described in the present invention.

[0093] In this embodiment, the structure of the flow-assisting arch 15 is as follows: Fig.16 , the depression depth e is 5mm.

[0094] In this embodiment, the pressure-bearing member 7 conforms to the second pressure-bearing mode, and the distances between the pressure-bearing member 7 and the radial inner and outer edges of the annular space 10 are a=4mm and b=8mm respectively. The bottom surface of the pressure-bearing member 7 is in the shape of two fitted rectangles, such as Fig.14 As shown in i.

[0095] In this embodiment, the installation angle of the blade 6 is radial, the wall thickness of the blade 6 is 4 mm, and the distances c and r between the blade 6 and the inner and outer edges of the inner and outer brake discs 1 and 3 are both 8 mm. Fig.16The cross-sectional shape of the blade 6 perpendicular to the axial direction is generally a straight plate shape. Fig.15 c.

[0096] In this embodiment, the thickness of the inner and outer brake discs 1, 3 are both 18 mm, the thickness of wall I is 5 mm, the thickness of wall II is 7 mm, and the spacing between the inner and outer brake discs 1, 3 is 20 mm.

[0097] In this embodiment, the volume filling rate of the working medium 14 is 35%.

[0098] In this embodiment, the working medium 14 is thermal conductive material, and the main body material is gray cast iron 250.

Claims

1. A new type of heat pipe air duct brake disc, comprising an inner brake disc, an outer brake disc, blades and a hub, characterized in that: The inner and outer brake discs are a pair of coaxial, same outer diameter, and coaxial lamellar annular spaces provided inside; a plurality of pressure-bearing parts evenly distributed around the axis are provided in the annular space, but the pressure-bearing parts do not divide the annular space into a plurality of independent spaces; the blades are hollow blades evenly distributed around the axis between the inner and outer brake discs, and are connected with the interior of the inner and outer brake discs to form a hollow impeller with a closed overall chamber inside the shell and a plurality of cooling air ducts outside the shell; without affecting the normal ventilation of the impeller, one or two of the inner and outer brake discs are coaxially connected to the wheel hub through their inner circles, and then the overall chamber is filled with working fluid and a vacuum is formed, so as to obtain the new heat pipe air duct brake disc described in the patent of the present invention.

2. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The corresponding part of the annular friction surface where the inner and outer brake discs contact the brake pads is a high-temperature heat storage ring, which is the hot end of the novel heat pipe air duct brake disc, and the rest of the brake disc is the cold end.

3. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The pressure bearing member has no intersection with the outlet of the working medium channel of the blade to prevent the working medium channel from being blocked.

4. The novel heat pipe air duct brake disc according to claim 2 is characterized in that: The blade is provided with a working fluid flow-aiding arch at its maximum rotation diameter. The flow-aiding arch is a blade edge arranged at the maximum rotation diameter of the blade, which is along the axis and concave toward the axis. The concave depth e ranges from 0 to 20 mm. This structure can eliminate or reduce the amount of working fluid accumulated in the blade at its maximum rotation diameter, and promote the accumulated fluid to flow to the hot end.

5. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The wall where the inner and outer brake discs contact the brake pads is set as wall II, and the inner surface of wall II is set as a capillary wall surface. The capillary wall surface can form wetting on the capillary wall surface together with the working fluid, so that the inner wall of the hot end is covered with a layer of liquid film, so that the working fluid evaporates more evenly and local dry burning at the hot end can be prevented.

6. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The pressure-bearing part is formed by one or a group of pseudo-prism entities. The pressure-bearing part is combined with the two inner flat walls of the inner and outer brake discs to withstand pressure, ensuring that the inner and outer brake discs are not deformed under pressure. The distance between the pressure-bearing part and the radial inner and outer edges of the annular space are a and b respectively, where a ranges from 0 to 20 mm and b ranges from 2 to 20 mm. The bottom surface shape of the pressure-bearing part is a single or a group of parallelograms, trapezoids, polygons, ellipses, arcs or wing shapes.

7. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The pressure-bearing part is composed of two or two groups of pseudo-prism entities with fitable inclined sides, wherein all the pseudo-prism entities on the same side of the pressure-bearing part are combined with a certain inner flat wall, and all the pseudo-prism entities on the other side of the pressure-bearing part are combined with another inner flat wall, and this combination is conducive to bearing pressure. The bottom surface shape of the pressure-bearing part is two or two groups of fit parallelograms, trapezoids, polygons or arcs. When the inner and outer brake discs are cut open along their inner and outer circumferences, each disc can be disassembled into two parts, each with half a pseudo-prism entity. After rotating and interlocking and welding the two parts, the inner and outer brake discs that can still bear pressure can be formed.

8. The novel heat pipe air duct brake disc according to claim 6 is characterized in that: An outward-stretching ventilation hole evenly distributed around the axis and penetrating the inner and outer brake discs is arranged at an appropriate position of the pressure-bearing member. The ventilation hole is not connected to the annular space in any way. The so-called outward-stretching property is that the radius of the air outlet position is greater than or equal to the radius of the air inlet position, and the air outlet position is arranged in the cooling air duct. The ventilation hole forms an angle θ with the rotating shaft, and the value range of θ is 0 to 60. o .

9. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The installation angle of the blade is backward curved, radial, and forward curved. The wall thickness of the blade is 1.5-10 mm. The distance between the blade and the inner and outer edges of the inner and outer brake discs is c and r, and the value range of c and r is 0-20 mm. The cross-sectional shape of the blade perpendicular to the rotation axis is roughly wing-shaped, arc-shaped, straight-plate-shaped or crescent-shaped; the thickness and wall thickness of the inner and outer brake discs are 10-25 mm and 1.5-15.0 mm respectively, and the wall thickness of the same wall is the same. The spacing between the inner and outer brake discs is 4-25 mm.

10. The novel heat pipe air duct brake disc according to claim 1 is characterized in that: The volume filling rate of the heat pipe working fluid is 5% to 50%; the working fluid is a mixture of one or more of deionized distilled water, toluene, naphthalene, biphenyl, thermal conductivity, mercury or potassium, and sodium; the heat pipe air duct brake disc body material is carbon fiber ceramic, composite material, metal or metal alloy.

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