CN114734756A

CN114734756A - Heat exchange tire and vehicle

Info

Publication number: CN114734756A
Application number: CN202210465043.1A
Authority: CN
Inventors: 刘晓玉; 朱亮亮; 徐婷
Original assignee: Ji Hua Laboratory
Current assignee: Ji Hua Laboratory
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-07-12

Abstract

The disclosure relates to the technical field of tire design and manufacture, in particular to a heat exchange tire and a vehicle. The heat exchange tire comprises a tire body, wherein a filling cavity is formed in the tire body, and a phase change heat absorption structure is filled in the filling cavity; the phase change heat absorption structure comprises a phase change material, wherein the phase change material can change phase under a running state of the tire and absorb heat of the tire body in the phase change process. The utility model provides a heat transfer tire and vehicle are through setting up the packing chamber in the inside of tire body, and fill phase transition heat absorption structure in the packing chamber, absorb the heat that the tire produced at the in-process of traveling, and this phase transition heat absorption structure is including phase change material, can carry out endothermic characteristic through the phase transition process through utilizing phase change material, realized the heat absorption to the tire, and need not come the inside heat of tire with the help of external structure and dispel, can realize the cooling effect to the tire, guarantee to the basis of the cooling effect of tire, the structure is simpler.

Description

Heat exchange tire and vehicle

Technical Field

The utility model relates to a tire manufacturing technology field especially relates to a heat transfer tire and vehicle.

Background

With the development of automobile intellectualization, electromotion, networking and sharing, the traditional pneumatic tire is difficult to meet the development requirements of future vehicles in the aspects of safety, driving performance and the like, and the non-pneumatic tire breaks through the limitation of the traditional pneumatic tire in the aspects of structure, materials, process and the like, has the potential of further improving the driving performance on the premise of ensuring the safety, and becomes the future development direction of the tire industry.

The non-pneumatic tire used in the market at present is usually made of super-elastic polymer materials, such as rubber, polyurethane, etc., however, no matter rubber, polyurethane or other polymer materials, internal heat is easily generated and hardly dissipated after long-time operation under high frequency or high load, and the problem of internal heat generation of the materials is a great obstacle to the development of the non-pneumatic tire.

Disclosure of Invention

In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a heat exchange tire and a vehicle.

In a first aspect, the present disclosure provides a heat exchange tire, which includes a tire body, a filler cavity is formed inside the tire body, and a phase change heat absorption structure is filled in the filler cavity;

the phase change heat absorption structure comprises a phase change material, wherein the phase change material can change phase under a running state of the tire and absorb heat of the tire body in a phase change process.

Optionally, the phase-change heat absorption structure further includes a heat conducting agent and an adsorbent, and the phase-change heat absorption structure is formed by mixing the phase-change material, the heat conducting agent and the adsorbent.

Optionally, the adsorbent is expanded graphite.

Optionally, the phase change material is a solid-liquid phase change material, and the phase change material can change from a solid state to a liquid state in a running state of the tire and absorb heat of the tire body in the process of changing from the solid state to the liquid state.

Optionally, the phase-change heat absorption structure further includes an encapsulation layer, and the encapsulation layer is located between the phase-change material and the cavity wall of the filler cavity.

Optionally, the encapsulation layer is of a tubular structure, and the encapsulation layer is in interference fit or adhesive connection with the cavity wall of the packing cavity.

Optionally, the heat exchange tire further comprises a wheel hub, and the tire body is arranged on an outer ring of the wheel hub;

the wheel hub is internally provided with a heat exchange cavity which is communicated with a filling cavity of the tire body.

Optionally, the stuffing cavity extends along the circumferential direction of the tire body in the inner part of the tire body and is annularly arranged.

Optionally, the number of the filler cavities is multiple, and all the filler cavities are uniformly distributed in the tire body.

Optionally, the tire body is of a hollow structure, and at least part of the filling cavity is formed at the hollow part of the tire body.

Optionally, the tire body further includes a side baffle, the side baffle is disposed on at least one axial side of the tire body, and the stuffing cavity is located inside the side baffle.

Optionally, the tire body includes an inner buffer layer, an outer buffer layer and a support structure, the heat exchange tire further includes a wheel hub, the inner buffer layer is disposed on an outer ring of the wheel hub, the support structure is disposed on the inner buffer layer, and the outer buffer layer is disposed on an outer ring of the inner buffer layer through the support structure;

the packing cavity is located inside the support structure.

Optionally, the tire body further comprises a shear layer, the shear layer is arranged on an outer ring of the outer buffer layer, and the filler cavity filled with the phase change heat absorption structure is arranged in the shear layer;

the shear layer comprises an outer enhancement layer, a middle elastic layer and an inner enhancement layer, and the filler cavity is located in the middle elastic layer.

In a second aspect, the present disclosure also provides a vehicle comprising the heat exchange tire described above.

Compared with the prior art, the technical scheme provided by the disclosure has the following advantages:

the utility model provides a heat transfer tire and vehicle is through the inside at the tire body sets up the packing chamber, and fill phase transition heat absorption structure in the packing chamber, play the heat that absorbs the tire and produce at the in-process of traveling, and this phase transition heat absorption structure is including phase change material, can carry out endothermic characteristic through the phase transition process through utilizing phase change material, realized the heat absorption to the tire, and need not come the inside heat of tire with the help of external structure and dispel, can realize the cooling effect to the tire. On the basis of guaranteeing the cooling effect to the tire, the structure is simpler.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic partial cross-sectional view of a heat exchange tire according to a first embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a heat exchange tire according to a first embodiment of the present disclosure;

FIG. 3 is a schematic partial cross-sectional view of a heat exchange tire according to a first embodiment of the present disclosure;

FIG. 4 is a schematic partial cross-sectional view of a heat exchange tire filled with a composite phase-change heat absorption structure according to a first embodiment of the disclosure;

FIG. 5 is a schematic partial cross-sectional view of a heat exchange tire with another packing cavity configuration according to an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of a heat exchange tire with a heat exchange cavity in a hub according to a second embodiment of the disclosure;

fig. 7 is a schematic perspective structure view of a heat exchange tire according to a third embodiment of the present disclosure;

fig. 8 is an axial structural schematic view of a heat exchange tire according to a third embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a heat exchange tire filled with a phase change heat absorption structure according to a third embodiment of the disclosure;

FIG. 10 is a schematic partial cross-sectional view of a heat exchange tire filled with a phase change heat absorbing structure according to a third embodiment of the disclosure;

fig. 11 is a schematic structural diagram of a heat exchange tire with a side baffle according to a third embodiment of the disclosure;

FIG. 12 is a schematic axial cross-sectional view of a side dam in accordance with a third embodiment of the present disclosure;

fig. 13 is a schematic structural view of a heat exchange tire according to a fourth embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a supporting structure of a heat exchange tire according to the fourth embodiment of the present disclosure;

FIG. 15 is a schematic cross-sectional view of a support structure of a heat exchange tire according to a fourth embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of another supporting structure of a heat exchange tire according to the fourth embodiment of the present disclosure;

FIG. 17 is a schematic cross-sectional view of another support structure for a heat exchange tire according to the fourth embodiment of the present disclosure;

fig. 18 is a schematic cross-sectional view of a shear layer of a heat-exchange tire according to example four of the present disclosure.

Wherein, 1, a tyre body; 10. a packing cavity; 11. an inner buffer layer; 12. an outer buffer layer; 13. a support structure; 14. a shear layer; 141. an outer reinforcement layer; 142. an intermediate elastic layer; 143. an inner reinforcement layer; 15. a tread; 16. a side baffle; 161. a protective layer; 162. an intermediate layer; 163. a filler layer; 2. a phase change heat absorbing structure; 21. a phase change material; 22. a packaging layer; 221. sealing the substrate; 222. a thermally conductive filler; 23. a heat conducting agent; 24. an adsorbent; 4. a hub; 41. a heat exchange cavity; 5. hollowing out a space; 6. an auxiliary support structure.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Compared with the traditional pneumatic tire, the non-pneumatic tire used in the market at present has larger driving potential, but the non-pneumatic tire adopting the high polymer material can convert mechanical energy into internal energy of the material under alternating load, and the internal heat is easy to generate after long-time running under high frequency or high load, and the internal heat is difficult to disperse. The rapid rise of the temperature inside the material can cause the performance of the material to be greatly reduced, even the tire body is damaged, and the internal heat generation problem causes the tire to be incapable of running for a long time, so that the production efficiency is greatly reduced, and therefore, the internal heat generation problem of the material applied to the non-pneumatic tire is a great obstacle for preventing the development of the non-pneumatic tire.

To above-mentioned defect, this embodiment provides a tire structure, through encapsulating phase change material inside the tire to utilize phase change material can be endothermic effect by oneself in phase change process, realized absorbing the heat that the tire produced through phase change material's phase change process when the tire temperature is too high, in order to maintain the tire and keep in comparatively normal temperature range in the use.

The specific arrangement of the tire structure is as follows:

example one

As shown in fig. 1 to 4, the present embodiment provides a heat exchange tire, which includes a tire body 1, a filler cavity 10 is provided inside the tire body 1, and a phase change heat absorption structure 2 is filled in the filler cavity 10. The phase change heat absorbing structure 2 comprises a phase change material 21, and the phase change material 21 can change phase under the tire driving state and absorb heat of the tire body 1 in the phase change process.

The heat exchange tire in the embodiment is mainly aimed at a non-inflatable tire, and the non-inflatable tire needs to be guaranteed to bear the same load as a traditional inflatable tire, so that a specific high polymer material needs to be used, the heat generated in the material is serious, the material cannot be distributed in a short time, and the continuous operation time is very limited, so that a cooling mechanism or a cooling mechanism needs to be arranged to relieve the heating condition. Although the heat exchange tire in the present embodiment is directed to a non-pneumatic tire, in other embodiments, it may be applied to a general pneumatic tire, and the cooling effect can be achieved by the above-mentioned arrangement.

The phase change material 21 can convert the internal heat of the tire into its normal phase change energy, for example, when the phase change material 21 is a solid-liquid phase change material, the phase change material is converted from a solid phase to a liquid phase in a phase change process, and the process absorbs heat, thereby reducing the internal temperature of the tire. After the tire stops running, the internal temperature of the tire is gradually reduced to the ambient temperature, and when the phase change material 21 generates negative phase change energy, namely, the phase change material is converted from a liquid phase to a solid phase in the phase change process, the process releases heat, so that a reversible energy storage process is realized through the phase change energy storage material.

This heat transfer tire is through setting up packing chamber 10 in the inside of tire body 1 to fill phase transition heat-absorbing structure 2 in packing chamber 10, absorb the tire in the heat that the in-process produced of traveling. This phase transition heat absorption structure 2 is including phase change material 21, and phase change material 21 can carry out endothermic characteristic through the phase transition process, on the unchangeable basis of volume, has realized the heat absorption to the tire, and need not dispel the heat of tire inside with the help of external structure, can realize the cooling effect to the tire. The traditional tire mainly adopts an air cooling or water cooling mode, the air cooling refrigeration effect is limited, and the water cooling application mode is complex. Compared with the prior art, the phase-change material 21 absorbs heat, so that the heat absorption effect is ensured, and the structure is simpler.

In addition, the tire is the only part of the vehicle contacting with the ground, the working condition is complex and severe when the vehicle runs, the impact of the uneven road surface forces the tire to have certain buffering and vibration damping performance, and therefore the phase change material 21 is applied to a non-pneumatic tire to consider whether the phase change material is failed or separated from the non-pneumatic tire due to large deformation. Secondly, the non-pneumatic tire has the characteristics of puncture resistance and tire burst resistance, and after the phase change material is applied to the non-pneumatic tire, the safety performance needs to be ensured.

The heat exchange tire provided by the embodiment specifically solves the problem of serious heat generation inside the tire by encapsulating the phase change heat absorption structure 2 containing the phase change material 21 inside the tire body 1. This kind of through the mode of phase transition process from inside themogenesis of inside absorption tire, for traditional tire with inside heat transfer to the mode that the surface cooled down, the cooling is faster to the structural feature of non-inflatable tire, the pertinence is stronger, and corresponding cooling effect is then better. In addition, because the phase change material 21 is encapsulated inside the tire body 1, the use safety can be ensured, and the risk of leakage is smaller.

The existing phase change material 21 includes several types of solid-liquid phase change materials, solid-gas phase change materials, solid-solid phase change materials, and liquid-gas phase change materials, wherein the solid-gas phase change materials and the liquid-gas phase change materials are relatively difficult to package and easy to leak, and the solid-solid phase change materials are convenient to store, but have the problems of too low thermal conductivity coefficient, large supercooling degree, stability and the like. Of course, in other embodiments, other types of phase change materials may be used as long as the functions of the present application are achieved.

When the solid-liquid phase change material is used, the phase change material 21 can change from a solid state to a liquid state in a tire running state and absorb heat of the tire body 1 during the phase change. And the volume is basically not changed, the influence on the tire body 1 is small, and the influence on the storage safety is low.

In the case of a non-pneumatic tire made of polyurethane, the strength of the material decreases by about half at a temperature of 70 to 80 ℃ and by about 80% at 110 ℃, and therefore, it is preferable to ensure that the temperature of the tire is stabilized at 50 ℃ or lower, and a material having a phase transition temperature of 50 ℃ or lower is preferably selected. In this embodiment, paraffin wax may be selected as the phase change material 21 applied inside the tire, which is substantially capable of satisfying the phase change temperature maintained at 50 ℃. And the latent heat value of the paraffin is higher, so that the highest temperature value of the internal environment temperature of the tire can be reduced, the heating speed can be reduced, and the overhigh and overhigh internal heat generation in the tire is fundamentally prevented. Of course, in other embodiments, other types of phase change materials may be selected as long as the required cooling effect can be satisfied.

For the phase change heat absorption structure 2, a phase change material 21 containing only common phase change material may be adopted, as shown in fig. 3, or a composite phase change heat absorption structure 2 may be adopted, that is, a plurality of materials are mixed to form the phase change heat absorption structure 2, as shown in fig. 4. When the composite phase-change heat absorption structure 2 is adopted, the phase-change heat absorption structure 2 comprises the heat conducting agent 23, the adsorbent 24 and the phase-change material 21, and the phase-change heat absorption structure 2 has a better effect by mixing the materials. Specifically, the heat conducting agent 23 can improve the heat absorption efficiency of the phase change material 21 for the tire body 1, and the adsorbent 24 can make the phase change heat absorption structure 2 more easily packaged and not easily leaked.

In the present embodiment, the thermal conductive agent 23 is a boron nitride thermal conductive material, the phase change material 21 is polyethylene glycol, and the adsorbent 24 is expanded graphite. The polyethylene glycol is used as the matrix of the phase change material 21, so that the temperature rise of the tire body 1 can be slowed down, the maximum temperature of the tire body can be reduced, and the service life of the tire can be prolonged, particularly when the tire runs at high speed. The surface of the expanded graphite is of a flake-shaped reticular pore structure, and the specific surface area of the expanded graphite can be increased due to the existence of the three-dimensional porous structure, so that the molten polyethylene glycol can be more easily adsorbed on the expanded graphite. Therefore, the expanded graphite can be used as a framework material for adsorbing polyethylene glycol and accommodating the boron nitride heat-conducting agent. Of course, in other embodiments, other materials of the thermal conductive agent 23, the adsorbent 24, and the phase change material 21 may be selected.

When the composite phase-change heat absorption structure 2 is prepared, polyethylene glycol/expanded graphite/boron nitride can be added into a constant-temperature heating magnetic stirrer according to the mass ratio of 91:5:4 and stirred for 4 hours to be fully mixed together.

For non-pneumatic tires, the shape and internal arrangement of which is varied, for a completely solid non-pneumatic tire, a cavity may be provided therein, which forms a filler cavity 10 inside the tire body 1 for receiving a phase change material 21, as shown in fig. 1. Specifically, the stuffing chamber 10 extends in the circumferential direction of the tire body 1 inside the tire body 1 and is disposed annularly. Namely, the heat exchange tube is arranged to extend along the circumferential direction of the tire body 1 so as to ensure that the heat exchange can be realized at each position of the tire.

Further, in order to play the more even effect of heat transfer, can also set up the quantity of packing chamber 10 into a plurality ofly, all packing chambers 10 are in the inside evenly distributed of tire body 1, see fig. 4 and show, and the distribution mode of this kind of discrete formula more can accelerate the heat transfer, and cooling efficiency further promotes.

On the basis of the phase change heat absorption structure 2, in order to further achieve a good packaging effect, a packaging layer 22 may be provided to further ensure the sealing of the phase change material 21. The packaging layer 22 is located between the phase change heat absorption structure 2 and the inner wall of the filling cavity 10, and is used for isolating the phase change material 21 from the intermediate rubber of the tire body 1, and avoiding the problems that the intermediate rubber of the tire body 1 is corroded by the phase change material 21 and the like.

In this embodiment, the encapsulating layer 22 is a tubular structure, and the encapsulating layer 22 is connected with the wall of the packing cavity 10 by interference fit or bonding. The encapsulating layer 22 is formed by a tubular structure, that is, the encapsulating layer 22 can be configured as a tubular structure capable of being formed, so as to be conveniently installed in the filling cavity 10 in the tire body 1.

In this embodiment, a manner of disposing the encapsulation layer 22 is provided, such that the encapsulation layer 22 includes the sealing substrate 221 and the heat conductive filler 222, where the sealing substrate 221 may be made of silicone rubber, and the material has low density, low permeability, and excellent elasticity, and can be relatively safely applied to encapsulation of the phase change material 21, and can be well fused with the intermediate rubber of the tire body 1. The silicon rubber has good elasticity at the temperature of-60 to 200 ℃, has good water resistance, ozone resistance and weather resistance, and is a packaging material with good performance.

The heat conductive filler 222 is mainly used to solve the problem that the sealing matrix 221 has low thermal conductivity, and the heat conductive filler 222 is added to the sealing matrix 221 because the sealing matrix 221 has low thermal conductivity, which causes the phase change material 21 in the sealing matrix to absorb heat for a long time and deteriorates the heat exchange performance with the tire main body 1.

The thermally conductive filler 222 also has a wide variety, such as metal oxide Al₂O₃When the sealing substrate 221 is made of high-temperature vulcanized silicone rubber, a large amount of Al is present₂O₃The particle bonds may be linked to the silicone rubber matrix, thereby increasing thermal conductivity. Alternatively, nitride phase transition endothermic structures such as AlN, BN and Si can be used₃N₄And the like, and has high thermal conductivity and high temperature resistance after filling.

The encapsulation layer 22 can effectively solve the problem of precipitation of the phase change material 21 due to liquefaction, while maintaining high thermal conductivity and high latent heat value of the phase change material 21. Due to certain elasticity, the whole non-pneumatic tire system has certain buffering effect, the thermal contact resistance between the phase change material 21 and the tire body 1 is reduced, and the heat radiation performance of the whole tire is further improved.

In order to ensure stable running of the tire, it is necessary to calculate the mass of the phase change material 21, and this value can be obtained from the internal heat of the tire, the specific heat capacity of the elastomer material, and the latent heat of phase change of the phase change material 21. The specific heat capacity of the tire is relatively well determined, and the latent heat of phase change of the phase change material 21 can be determined by:

first, with respect to latent heat of phase change, it refers to the amount of heat absorbed or released per unit mass or per unit mass that is converted from one phase to another at isothermal and isobaric pressures. The temperature of the phase change material 21 employed in the present embodiment at the time of phase change hardly changes, and therefore the specific heat capacity is not suitable for calculation of the latent heat of phase change of the phase change material 21. Considering that the solid-liquid phase-change material 21 is mainly used in the present embodiment, the latent heat of phase change of such a solid phase into a liquid phase by heat absorption is also referred to as heat of fusion, and thus can be measured by an empirical formula, a time-step-variable method, a finite difference-finite element method, an enthalpy method, a sensible heat fusion method, or the like. The most commonly used instrumental methods for testing currently include Differential Scanning Calorimetry (DSC) and reference temperature curve method (T-history).

For non-pneumatic tires of different usage scenarios, the difference in the heat generation situation is large, and therefore, it is necessary to calculate the initial value of the volume or mass of the phase change material 21 required according to a certain method. The present embodiment provides a calculation method as follows:

for non-pneumatic tires, the temperature of the structural components increases due to the heat generated therein resulting from the dissipation of energy from the elastomeric material under dynamic loading. Based on the principle, the energy dissipation of the non-pneumatic tire in one rolling circle can be obtained through a finite element simulation means or a test method when the non-pneumatic tire rolls in a steady state.

Depending on the size (e.g. diameter) of the non-pneumatic tire, and the usual operating conditions (e.g. speed v of travel), the total energy dissipation of the elastomeric material at continuous travel time is:

wherein e is the energy dissipation of the non-pneumatic tire rolling for one circle, v is the driving speed per hour under the common working condition, t is the continuous driving time, and d is the diameter of the non-pneumatic tire.

On this basis, at least the required mass of the phase change material is calculated by the following formula:

Q_{suction device}＝mr

Q_{Suction device}≥E-m₁c(t₀-t₁)

Wherein m is the mass of the phase change material, r is the latent heat of phase change of the phase change material, and m₁Is the total mass of the elastomeric material of the tire, c is the specific heat capacity of the elastomeric material of the tire, t₀Is the phase transition temperature, t, of the phase change material₁Is the ambient temperature at which the tire is traveling.

According to the formula, the design initial value of the mass of the phase change material of the non-pneumatic tire can be obtained.

Example two

As shown in fig. 5, the present embodiment provides a heat exchange tire, which has a structure substantially the same as that of the first embodiment, except for the arrangement manner of the phase change heat absorption structure 2.

In this embodiment, the heat exchange tire further includes a hub 4 disposed at the inner ring of the tire body 1. The inside of the wheel hub 4 is provided with a heat exchange cavity 41, and the heat exchange cavity 41 is communicated with the filling cavity 10 inside the tire body 1.

Because wheel hub 4 that the tire used is the metal material, usually be the aluminum alloy material, the heat conductivity is very high, can carry out the forced air cooling fast, this heat that will release phase change material 21 fast and absorb, therefore, through inside and the wheel hub 4 of intercommunication tire, make phase change material 21 can flow between the inside heat transfer chamber 41 of wheel hub 4 of tire body 1, thereby can utilize metal wheel hub to release the heat that phase change material 21 absorbed, make phase change material 21 better regulation tire inside temperature, realize that the inside temperature of tire lasts stably under the lower temperature, namely accelerated phase change material 21's reversible conversion, be favorable to the stability of inside temperature.

EXAMPLE III

As shown in fig. 6 to 12, the present embodiment provides a heat exchange tire, which is substantially the same as the heat exchange tire of the first embodiment in the arrangement manner of the phase change heat absorption structure 2 inside the tire, and the difference is the structural shape of the applied tire.

In the present embodiment, the heat exchanging tire is a hollow tire structure, such as a honeycomb tire, a spoke tire, and the like, which can be seen in fig. 6 and 7.

The heat transfer tire design is fretwork formula structure, compares the material less with solid tyre, can accelerate the heat dissipation, but the promotion of radiating effect is limited, consequently still need combine phase transition heat absorbing structure 2 to guarantee the cooling effect. Moreover, because the hollow structure needs to bear the same load as a solid tire, the adopted polymer material is stronger than rubber, such as a polymer elastomer, but the internal heat generation of the material is more serious than that of common rubber.

Fig. 6 shows a hollow tire structure, which has a plurality of hollow spaces 5, the hollow spaces 5 form a filling cavity 10 of the tire body 1, and the phase change heat absorption structure 2 can be filled in the hollow spaces 5. On the basis of the structure, the packaging layer 22 can be firstly set to be the same as the hollow space 5 in shape during manufacturing, and then the phase change heat absorption structure 2 is injected into the packaging layer 22 and finally filled into the hollow space 5. The packaging layer 22 can be in interference fit with the inside of the hollow space 5, and the connection mode can be mechanical nesting or bonding.

Although the present embodiment provides only one hollow tire structure, the present embodiment is only an exemplary hollow manner of the tire, and does not represent that the heat exchange tire only refers to the hollow tire structure shown in the drawings. In other embodiments, the tire with different hollow shapes may be adaptively adjusted and designed as long as the position of the filling cavity 10 is ensured, for example, a honeycomb structure or other combined-shape structures.

Moreover, the material of the tire body 1 at the hollow part can be polyurethane material, or elastic metal sheet, other high polymer material or composite material can be selected, so that the tire can have enough elastic supporting function.

In some hollow tire structures mainly made of polyurethane, an auxiliary support structure 6 may be further disposed in a part of the hollow space 5, as shown in fig. 9. The auxiliary support structure 6 is mainly a support structure with a stronger elasticity than the tread rubber and weaker than polyurethane, preferably foamed polyurethane. This structural shape is porous structure, like honeycomb or bubble bag structure, and the main effect of this structure is in order to prevent that hollow out construction's root earthing part from appearing stress concentration phenomenon, perhaps mutual interference appears great frictional heating, will greatly improve bottom endotherm, also improves the earthing stress simultaneously, and it is more even to ground connection, improves the earthing stress and concentrates to improve 15 wearing and tearing homogeneity of tread, improve the tire life-span.

For the hollow tire structure, a side baffle 16 may be further provided to prevent external dust or stones from falling into the hollow space 5, as shown in fig. 11. The side barrier 16 is provided on at least one side of the tire body 1, and in the present embodiment, it is adopted that the side barrier 16 is provided on the outer side of the tire body 1, that is, on the side of the tire body 1 away from the vehicle equipment on which the tire body 1 is mounted. In other embodiments, side dams 16 may be installed on both sides of the tire body 1.

When the side baffle 16 is provided, the phase change heat absorption structure 2 can be arranged in the side baffle 16, the temperature in the tire can be reduced through the side baffle 16, and the leakage rate is lower.

Specifically, the side barrier 16 includes a protective layer 161, an intermediate layer 162, and a filler layer 163, as can be seen in particular in fig. 12. The protective layer 161 is located on the outermost side and mainly plays a role of protecting the tire side, the middle layer 162 can also improve the heat conductivity while playing a further protective role, so that the heat inside the tire body 1 is more quickly dissipated into the environment, and the filler layer 163 is located on the innermost side and plays a role of absorbing heat. In this embodiment, the protective layer 161 is mainly composed of reinforced fibers, such as nylon, glass fibers, carbon fibers or steel wires, and the matrix is rubber or polyurethane; the intermediate layer 162 is a hard particle layer, wherein the hard particles are metal oxide or nitride hard particles, and the matrix is rubber or polyurethane; the filler layer 163 adopts a common phase-change heat-absorbing structure 2, i.e. a single phase-change material 21 or a composite phase-change heat-absorbing structure 2, i.e. a composite phase-change material 21 formed by mixing a plurality of materials.

After the phase change heat absorption structure 2 is arranged on the side baffle 16, the effect of a cooling baffle is achieved, so that the tire structure near the baffle has lower temperature, the temperature can be guaranteed to be maintained near the phase change temperature, and the non-pneumatic tire can run at medium and high speed.

Example four

As shown in fig. 13 to 17, the present embodiment provides a heat exchange tire, which is substantially the same as the heat exchange tire of the first embodiment in the arrangement manner of the phase change heat absorption structure 2 in the tire, except for the structural shape of the applied tire.

In this embodiment, the tyre body 1 of the heat exchange tyre comprises an inner breaker 11, an outer breaker 12 and a support structure 13, the heat exchange tyre being mounted on the outside of a wheel hub (not shown in the figures). The inner damping layer 11 is arranged at the outer ring of the hub, the support structure 13 is arranged on the inner damping layer 11, and the outer damping layer 12 is arranged at the outer ring of the inner damping layer 11 through the support structure 13. The packing chamber 10 is located inside a support structure 13. The outer side of the outer buffer layer 12 is also provided with a shear layer 14, and the outer side of the shear layer 14 is fixedly connected with a tread 15.

Wherein the inner and outer buffer layers 11, 12 are primarily of a superelastic material, and the support structure 13 and shear layer 14 comprise a superelastic material and a reinforced composite structure.

For the heat exchange tire with the supporting structure 13, the position with the largest heat generation in deformation is the supporting structure 13, particularly at the intersection of the supporting parts, and the bionic leg joint point of the bionic non-pneumatic tire. When the bionic leg is deformed, the parts which are most prone to internal heat generation are the top part, the bottom part and the middle part, the phase-change materials 21 are accurately arranged at the nodes, the internal temperature can be reduced, the fatigue life of the bionic leg is prolonged, meanwhile, the phase-change materials 21 are concentrated to the parts which are most prone to internal heat generation, and the using amount of the phase-change materials 21 can also be reduced, for example, as shown in fig. 14 and 15.

In another form of non-pneumatic tire, as shown in fig. 16 and 17, the support structure 13 is X-shaped and a phase change material 21 may be disposed at the central intersection of the support structure, which may greatly reduce the internal heat generation at that location and increase the fatigue life of the support structure 13.

On the basis of this, phase change material 21 can also be arranged in shear layer 14, as shown in fig. 18, shear layer 14 includes an outer reinforcement layer 141, an intermediate elastic layer 142 and an inner reinforcement layer 143, and this "sandwich" structure can enhance the shearing action, but is also the most prone to internal heat generation, so that phase change material 21 is arranged therein, the heat at this position is reduced, and the fatigue life of the shear band is improved.

EXAMPLE five

The present embodiment provides a vehicle including a vehicle body and a tire provided at a bottom of the vehicle body. The tire in this embodiment uses the heat transfer tire, and the heat transfer tire can realize the heat transfer to the tire under vehicle driving state to reduce the tire and in great endotherm of driving in-process, avoid causing the damage to its structure.

The specific structure and the implementation principle of the heat exchange tire in this embodiment are substantially the same as those of the heat exchange tire provided in the first embodiment, and the same or similar technical effects can be brought.

The vehicle provided in this embodiment may be a passenger vehicle, such as a car, or may also be a heavy industrial vehicle, such as a loading vehicle, a truck, or other mechanical vehicles with specific functions, and the embodiment is not limited thereto. Any vehicle which has heat exchange requirements and can use the heat exchange tire belongs to the protection scope of the embodiment.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The heat exchange tire is characterized by comprising a tire body (1), wherein a filling cavity (10) is formed in the tire body (1), and a phase change heat absorption structure (2) is filled in the filling cavity (10);

the phase change heat absorption structure (2) comprises a phase change material (21), and the phase change material (21) can change phase under a tire driving state and absorb heat of the tire body (1) in a phase change process.

2. The heat exchange tyre according to claim 1, wherein the phase-change heat absorption structure (2) further comprises a heat conducting agent (23) and an adsorbent (24), the phase-change heat absorption structure (2) being formed by mixing the phase-change material (21), the heat conducting agent (23) and the adsorbent (24).

3. The heat exchange tire of claim 2, wherein the adsorbent (24) is expanded graphite.

4. The heat exchange tyre according to claim 1, wherein the phase change material (21) is a solid-liquid phase change material, the phase change material (21) being capable of changing from a solid state to a liquid state in a tyre driving condition and absorbing heat of the tyre body (1) during the change from the solid state to the liquid state.

5. The heat exchange tyre according to claim 1, wherein the phase change heat absorbing structure (2) further comprises an encapsulating layer (22), the encapsulating layer (22) being located between the phase change material (21) and the wall of the filler cavity (10).

6. The heat exchange tire according to claim 5, wherein the encapsulating layer (22) is of a tubular structure, and the encapsulating layer (22) is in interference fit or adhesive connection with the wall of the filler cavity (10).

7. The heat exchange tyre according to claim 1, characterized in that it further comprises a hub (4), said tyre body (1) being arranged at the outer ring of said hub (4);

the wheel hub (4) is internally provided with a heat exchange cavity (41), and the heat exchange cavity (41) is communicated with the filling cavity (10) of the tire body (1).

8. Heat exchange tyre according to any one of claims 1 to 7, characterized in that said stuffing chamber (10) extends inside said tyre body (1) along the circumferential direction of said tyre body (1) and is arranged annularly.

9. Heat exchange tyre according to any one of claims 1 to 7, characterized in that said stuffing chambers (10) are in a plurality, all said stuffing chambers (10) being uniformly distributed inside said tyre body (1).

10. The heat exchange tire according to any one of claims 1 to 7, wherein the tire body (1) is of a hollow structure, and the hollow of the tire body (1) forms at least part of the filling cavity (10).

11. The heat exchange tire according to claim 10, wherein the tire body (1) further comprises a side baffle (16), the side baffle (16) being disposed on at least one side of the tire body (1) in the axial direction, at least a part of the stuffing chamber (10) being located inside the side baffle.

12. The heat exchange tire according to any one of claims 1 to 7, wherein the tire body (1) comprises an inner breaker ply (11), an outer breaker ply (12) and a support structure (13), the heat exchange tire further comprising a hub (4), the inner breaker ply (11) being disposed at an outer ring of the hub (4), the support structure (13) being disposed on the inner breaker ply (11), the outer breaker ply (12) being disposed at an outer ring of the inner breaker ply (11) through the support structure (13);

the packing chamber (10) is located inside the support structure (13).

13. The heat exchange tire according to claim 12, wherein the tire body (1) further comprises a shear layer (14), the shear layer (14) being disposed at an outer ring of the outer breaker layer (12), the filler cavity (10) filled with the phase change heat absorbing structure (2) being disposed within the shear layer (14);

the shear layer (14) comprises an outer reinforcement layer (141), an intermediate elastic layer (142) and an inner reinforcement layer (143), the filler cavity (10) being located in the intermediate elastic layer (142).

14. A vehicle comprising the heat exchange tire of any one of claims 1 to 13.