CN115419667A - Heat dissipation method for disc type truck and passenger car brake mechanism - Google Patents
Heat dissipation method for disc type truck and passenger car brake mechanism Download PDFInfo
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- CN115419667A CN115419667A CN202211191686.8A CN202211191686A CN115419667A CN 115419667 A CN115419667 A CN 115419667A CN 202211191686 A CN202211191686 A CN 202211191686A CN 115419667 A CN115419667 A CN 115419667A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/784—Features relating to cooling the coolant not being in direct contact with the braking surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/789—External cooling ribs
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Abstract
The invention provides a heat dissipation method of a disc type truck and passenger car brake mechanism, which comprises the following steps: step S10: refrigerant is injected into each heat dissipation pipeline, the specific heat capacities of the refrigerant in at least two heat dissipation pipelines are different, and the boiling point of the refrigerant with the small specific heat capacity is high; step S20: guiding out the refrigerant in each heat dissipation pipeline and reducing the temperature of the refrigerant through a radiator; step S30: and the cooled refrigerant is re-injected into the corresponding heat dissipation pipeline to form circulation. By applying the technical scheme of the invention, the problem of poor heat dissipation effect of the vehicle braking system in the prior art can be effectively solved.
Description
Technical Field
The invention relates to the field of vehicle brake mechanisms, in particular to a heat dissipation method of a disc type truck and passenger car brake mechanism.
Background
At present, with the upgrade of a brake system from a traditional brake to an ABS (anti-lock brake system) and then from the ABS to an EBS (electronic brake system), an ESC (electronic stability control) function is realized on the basis, and the specifications of the national standard 'motor vehicle operation safety technical conditions' are continuously updated (GB 7258). (GB 7258-2017) it is stated therein that the front wheels of all special school buses and transport wagons for dangerous goods and of other passenger buses with a length of more than 9m, as well as all the wheels of semitrailers for transport of dangerous goods, of trialls and of storage-grid semitrailers, should be equipped with disc brakes. Because the disc brake has higher heat dissipation efficiency than the drum brake and better performance than the drum brake, the disc brake becomes the mainstream in the later period.
Although disc brake is superior to drum brake, the axle adopting disc brake is easy to cause high-temperature tire burst and tire fire due to high temperature, and is affected by vehicle safety, cargo safety and personal safety. Under the background, the trailer axle brake and the axle head part can control the high temperature within a reasonable range by continuous long-distance braking, so that a heat exchange system for normal operation is very important.
Currently, the braking friction generates heat and dissipates heat in the following three ways:
firstly, water cooling; because the brake disc trickle can make the brake disc lead to the brake disc to warp because of the temperature difference is uneven, consequently the unable trickle scheme that uses of disc braking. In addition, the water cooling mode temperature control is limited to be used in the icing area in the northern area, so that subsequent vehicle traffic accidents caused by the fact that the film material coefficient is reduced due to icing or wet and slippery road surfaces are avoided.
Secondly, air cooling; the forced air cooling technology does not have too large application space in an open space, so that the effect of air cooling for disc braking is poor.
Thirdly, the hydraulic retarder is utilized to reduce braking friction, and the construction cost of the braking system is high due to the structure.
Disclosure of Invention
The invention mainly aims to provide a heat dissipation method for a disc type truck and passenger car brake mechanism, which aims to solve the problem of poor heat dissipation effect of a vehicle brake system in the prior art.
In order to achieve the above object, the present invention provides a heat dissipation method for a brake mechanism of a disc type passenger car, the brake mechanism of the disc type passenger car including a first disc body and a second disc body which are oppositely arranged, a plurality of independent heat dissipation pipes are provided between an inner surface of the first disc body and an outer surface of the second disc body, the heat dissipation method including: step S10: refrigerant is injected into each heat dissipation pipeline, the specific heat capacity of the refrigerant in at least two heat dissipation pipelines is different, and the boiling point of the refrigerant with small specific heat capacity is high; step S20: guiding out the refrigerant in each heat dissipation pipeline and reducing the temperature of the refrigerant through a radiator; step S30: and the cooled refrigerant is re-injected into the corresponding heat dissipation pipeline to form circulation.
In one embodiment, the difference between the specific heat capacity of the refrigerant in one of the heat radiation pipes and the specific heat capacity of the refrigerant in the other heat radiation pipe is 1.8J/(kg · k) or more.
In one embodiment, the step S10 includes: and water is injected into one of the heat dissipation pipelines, and glycol, industrial salt or glycerol water is injected into the other heat dissipation pipeline.
In one embodiment, the heat dissipation pipes extend in a circumferential direction centering on an axis of the first disc, the plurality of heat dissipation pipes are arranged at intervals in a radial direction of the first disc, and the step S10 includes: and injecting a first liquid conducting medium into the radiating pipeline positioned at the outer side, and injecting a second liquid conducting medium into the radiating pipeline positioned at the inner side, wherein the specific heat capacity of the first liquid conducting medium is greater than that of the second liquid conducting medium.
In one embodiment, each heat dissipation pipeline comprises an inlet and an outlet, and the coolant in the heat dissipation pipeline is guided out from the outlet under the action of the circulating pump and is injected into the heat dissipation pipeline from the inlet to form a circulation.
In one embodiment, step S20 includes: step S21: guiding the refrigerants in the heat dissipation pipelines into the corresponding first sealing cavities; step S22: leading out gas in a first sealing cavity corresponding to a refrigerant with the largest specific heat capacity; step S23: and leading out the refrigerant in each first sealed cavity to the radiator.
In one embodiment, step S22 further comprises: the refrigerant is supplied to the flow path where the refrigerant having the largest specific heat capacity is located while the gas is discharged.
In one embodiment, step S30 includes: step S31: injecting the cooled refrigerants of the flow paths into the corresponding second sealing cavities; step S32: and re-injecting the refrigerant in each second sealed cavity into the corresponding heat dissipation pipeline.
In one embodiment, the plurality of first sealed cavities and the plurality of second sealed cavities are arranged in a gapless manner along the preset direction n, and the first sealed cavities and the second sealed cavities corresponding to the refrigerant with the largest specific heat capacity are arranged at two ends of the other first sealed cavities and the other second sealed cavities.
In one embodiment, step S20 includes: the temperature of the refrigerant led out from each heat dissipation pipeline is reduced by the same radiator.
By applying the technical scheme of the invention, the two heat dissipation pipelines are filled with low-temperature refrigerants (liquid conduction media), and then the two heat dissipation pipelines absorb heat between the first tray body and the second tray body so as to cool the first tray body and the second tray body. And then the high-temperature refrigerant after heat absorption is led out, the high-temperature refrigerant enters the radiator for heat dissipation, the low-temperature refrigerant is formed again after heat dissipation and enters the heat dissipation pipeline, and the circulation is carried out, so that the heat of the brake mechanism can be led out quickly. The brake mechanism is cooled by utilizing the structure, and the brake mechanism has the following advantages: firstly, the deformation of the first tray body and the second tray body can not be caused; secondly, the device is not limited by the environment and is suitable for northern cold areas; thirdly, the cooling effect is good when the cooling device is used in an open space; fourthly, the cost is low. In addition, more importantly, by applying the technical scheme of the invention, when the heat dissipation device is actually used, the two heat dissipation pipes need to be filled with liquid conduction media with different specific heat capacities (namely, one heat dissipation pipe is filled with a first liquid conduction medium with a larger specific heat capacity, the other heat dissipation pipe is filled with a second liquid conduction medium with a smaller specific heat capacity, and the boiling point of the second liquid conduction medium is larger than that of the first liquid conduction medium). The liquid with different specific heat capacities is mainly selected to guide the heat in a high area to a low area, so that the aim of effectively reducing the temperature is fulfilled. In addition, when the brake system brakes normally or continuously with a small amplitude, the first liquid conduction medium and the second liquid conduction medium can absorb heat together, so that a good cooling effect is achieved. When emergency braking or continuous large-amplitude braking, as the braking action is violent, the disc brake quickly generates high temperature at the moment, the temperature exceeds the boiling point of the first liquid conduction medium, at the moment, the first liquid conduction medium is vaporized, but the second liquid conduction medium is still liquid, a better heat absorption effect can be still achieved, and the cooling effect is guaranteed.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic perspective view of a heat exchange pipeline adopted in an embodiment of a heat dissipation method of a disc type passenger car brake mechanism according to the invention;
FIG. 2 shows a front view of the heat exchange circuit of FIG. 1;
FIG. 3 shows an enlarged schematic view of the heat exchange line of FIG. 2 at A;
figure 4 shows a longitudinal cross-sectional view of the heat exchange line of figure 1;
FIG. 5 illustrates a front view of a braking system employed in an embodiment of a method of dissipating heat from a disc-type passenger vehicle brake mechanism in accordance with the present invention;
FIG. 6 illustrates a cross-sectional view of the braking system of FIG. 5 in the direction H-H;
FIG. 7 illustrates a cross-sectional view of the braking system of FIG. 5 in the direction J-J;
FIG. 8 illustrates a side view of the braking system of FIG. 5;
FIG. 9 is an enlarged schematic structural view showing a cross-sectional view taken along line L-L of the braking system of FIG. 8;
FIG. 10 illustrates an enlarged structural schematic view of a cross-sectional view taken along line G-G of the braking system of FIG. 8; and
fig. 11 shows a flow chart of a heat dissipation method of a disc type truck passenger car brake mechanism according to the invention.
Wherein the figures include the following reference numerals:
1. an annular chamber; 2. a liquid exchange chamber; 10. a pipeline collection shaft; 11. a flow-through chamber; 12. a first overflow aperture; 13. a hollow shaft; 14. a partition wall; 15. a second overflowing hole; 20. a heat dissipation plate; 21. a heat dissipation pipe; 211. a functional tube; 212. a transition bent pipe; 213. a connecting pipe; 30. a braking mechanism; 31. a first tray body; 32. a second tray body; 33. a receiving gap; 40. a support shaft; 41. a third overflowing hole; 50. a bearing; 60. a heat exchange line; 70. a circulating heat dissipation mechanism; 71. a circulation line; 72. a circulation pump; 73. a heat sink; 100. an annular convex rib; 110. a partition plate; 120. and (5) sealing rings.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 5 to 11, in the present embodiment, the disc type passenger car brake mechanism includes a first disc body 31 and a second disc body 32 which are oppositely arranged, and a plurality of independent heat dissipation pipes 21 are provided between an inner surface of the first disc body 31 and an outer surface of the second disc body 32, and the heat dissipation method includes: step S10: refrigerant is injected into each heat dissipation pipeline 21, and the specific heat capacity of the refrigerant in at least two heat dissipation pipelines 21 is different; step S20: guiding out the refrigerant in each heat dissipation pipeline 21 and reducing the temperature of the refrigerant through a radiator 73; step S30: the cooled refrigerant is re-injected into the corresponding heat dissipation pipeline 21 to form a cycle.
By applying the technical scheme of the embodiment, the two heat dissipation pipes 21 are filled with a low-temperature refrigerant (liquid conduction medium), and then the two heat dissipation pipes 21 absorb heat between the first tray body 31 and the second tray body 32 to cool the first tray body 31 and the second tray body 32. And then the high-temperature refrigerant after heat absorption is led out, the high-temperature refrigerant enters the radiator 73 for heat dissipation, the low-temperature refrigerant is formed again after heat dissipation and enters the heat dissipation pipeline 21, and the circulation is carried out, so that the heat of the brake mechanism can be led out quickly. Utilize above-mentioned structure to the braking mechanism heat dissipation, have following several advantages: first, the first tray 31 and the second tray 32 are not deformed; secondly, the device is not limited by the environment and is suitable for northern cold areas; thirdly, the cooling effect is good when the cooling device is used in an open space; fourthly, the cost is low. In addition, more importantly, by applying the technical solution of the present embodiment, when in actual use, the two heat dissipation pipes 21 need to be filled with liquid conduction media with different specific heat capacities (i.e., one heat dissipation pipe 21 is filled with a first liquid conduction medium with a larger specific heat capacity, the other heat dissipation pipe 21 is filled with a second liquid conduction medium with a smaller specific heat capacity, and a boiling point of the second liquid conduction medium is greater than a boiling point of the first liquid conduction medium). The liquid with different specific heat capacities is mainly selected to guide the heat in a high area to a low area, so that the aim of effectively reducing the temperature is fulfilled. In addition, when the braking system brakes normally or continuously in a small amplitude mode, the first liquid conduction medium and the second liquid conduction medium can absorb heat together, and therefore a good cooling effect is achieved. When emergency braking or continuous large-amplitude braking, as the braking action is violent, the disc brake quickly generates high temperature at the moment, the temperature exceeds the boiling point of the first liquid conduction medium, at the moment, the first liquid conduction medium is vaporized, but the second liquid conduction medium is still liquid, a better heat absorption effect can be still achieved, and the cooling effect is guaranteed.
The effect of selecting liquids with different specific heat capacities to be injected into the two heat dissipation pipes 21 will be described in detail below:
when the heat exchange pipe is particularly applied between the first tray 31 and the second tray 32 of the heating system, one of the heat dissipation pipes 21 (hereinafter, referred to as a first heat dissipation pipe) is close to the center of the first tray 31 and the second tray 32 and filled with the second conductive medium, and the other heat dissipation pipe 21 (hereinafter, referred to as a second heat dissipation pipe) is close to the edge of the first tray 31 and the second tray 32 and filled with the first conductive medium. When the brake system works, the temperature of the central area where the second radiating pipe is located is high due to the fact that the specific heat capacity of the second conducting medium is small. The specific heat capacity of the first conducting medium is large, and the temperature of the edge area where the first radiating pipe is located is low. Thus, the heat of the central region is directed to the edge region. And because the specific heat capacity of the first conducting medium is large, the temperature rise is slow, and along with the flowing of the first conducting medium, the heat of the edge area can be quickly brought out by the first conducting medium, so that the temperature reduction effect is ensured.
In the present embodiment, the difference between the specific heat capacity of the refrigerant in one of the heat radiation pipes 21 and the specific heat capacity of the refrigerant in the other heat radiation pipe 21 is 1.8J/(kg · k) or more. In fact, the larger the difference in specific heat capacity between the first liquid conductive medium and the second liquid conductive medium, the better. Therefore, the diversion effect is obvious, the heat in a high area can be effectively diverted to a low area, and the temperature can be effectively reduced.
In this embodiment, water is injected into one of the heat dissipation pipes 21, and proportioned water (e.g., ethylene glycol, industrial salts, glycerin water) having a boiling point of more than 150 ℃ is injected into the other heat dissipation pipe 21. The coolant is selected as the first liquid conducting medium and the second liquid conducting medium, so that the cost required by heat dissipation can be effectively reduced.
In this embodiment, each heat dissipation pipeline 21 includes a liquid inlet and a liquid outlet, and the refrigerant in the heat dissipation pipeline 21 is led out from the liquid outlet under the action of the circulation pump 72, and is injected into the heat dissipation pipeline 21 from the liquid inlet to form a circulation under the action of the circulation pump 72. The above steps enable the low-temperature refrigerant to be continuously injected into the heat dissipation pipeline 21, so that the heat dissipation effect of the brake mechanism is good.
When emergency braking or continuous large-amplitude braking is carried out, the disc brake quickly generates high temperature due to violent braking action, the temperature exceeds the boiling point of the first liquid conducting medium, and the first liquid conducting medium is vaporized at the moment, so that the air resistance phenomenon of a pipeline can occur, and the circulation is influenced. In order to solve the above problem, as shown in fig. 11, in the present embodiment, step S20 includes: step S21: guiding the refrigerant in each heat dissipation pipeline 21 to a plurality of corresponding first sealing cavities; step S22: leading out gas in a first sealing cavity corresponding to a refrigerant with the largest specific heat capacity; step S23: the refrigerant in each first sealed chamber is led out to the radiator 73. The steps enable the vaporized first liquid conducting medium to be smoothly led out, and prevent the air resistance phenomenon.
Since part of the first liquid conductive medium may vaporize and exit the brake system, in order to supplement the first liquid conductive medium, in this embodiment, step S22 further includes: the refrigerant is supplied to the flow path where the refrigerant having the largest specific heat capacity is located while the gas is discharged.
As shown in fig. 11, in the present embodiment, step S30 includes: step S31: injecting the cooled refrigerants of the flow paths into the corresponding second sealing cavities; step S32: and the refrigerant in each second sealed cavity is re-injected into the corresponding heat dissipation pipeline 21.
In this embodiment, the plurality of first seal cavities and the plurality of second seal cavities are arranged in a gapless manner along the preset direction n, and the first seal cavity and the second seal cavity corresponding to the refrigerant with the largest specific heat capacity are disposed at two ends of the other first seal cavity and the other second seal cavity. The above arrangement prevents the first liquid conductive medium from forming a gaseous state in the cross management and effectively vaporizes only at the position of the third overflowing hole 41.
In the present embodiment, step S20 includes: the refrigerant led out from each of the heat radiation pipes 21 is cooled by the same radiator 73. The above structure can reduce the cost of the brake system.
The following describes the structures of the heat exchange pipeline, the brake system and the vehicle for implementing the heat dissipation method:
as shown in fig. 1 to 4, the heat exchange pipeline adopting the heat dissipation method of the present embodiment includes: a pipe collection shaft 10 and a heat dissipation plate 20. The pipeline collecting shaft 10 is provided with four independent overflowing cavities 11 in the pipeline collecting shaft 10, and the pipeline collecting shaft 10 is further provided with four first overflowing holes 12 corresponding to the four overflowing cavities 11. The pipe collecting shaft 10 is perpendicular to the heat dissipation plate 20, the heat dissipation plate 20 includes two heat dissipation pipes 21, and the ports of all the heat dissipation pipes 21 are communicated with different flow through cavities 11.
It should be noted that the number of the through-flow cavities 11 may also be an even number greater than 4.
As shown in fig. 2 to 4, the pipe collecting shaft 10 includes a hollow shaft 13 having end faces at both ends, and two partition walls 14 disposed inside the hollow shaft 13 and intersecting with each other, and the two partition walls 14 divide a cavity inside the hollow shaft 13 into four flow-through chambers 11. The structure is simple and easy to process.
As shown in fig. 2 and 3, four second overflowing holes 15 are circumferentially arranged on a side wall of the first end of the pipeline collecting shaft 10, the four second overflowing holes 15 are arranged in one-to-one correspondence with the four overflowing cavities 11, a port of each heat dissipation pipeline 21 is connected to the corresponding second overflowing hole 15, and the four first overflowing holes 12 are located on a side wall of the second end of the pipeline collecting shaft 10. The structure is simple and easy to process.
As shown in fig. 2 and 3, the heat dissipating pipe 21 includes two functional pipes 211 arranged in parallel, a transition bent pipe 212 connecting the two functional pipes 211, and two connection pipes 213 connecting free ends of the two functional pipes 211, the connection pipes 213 being connected to the second overflowing hole 15, and the functional pipes 211 including a plurality of bent sections connected to each other. The structure enables the length of the heat dissipation pipeline 21 to be as long as possible, so that the heat absorption capacity of the heat exchange pipeline is improved, and the temperature of the brake system is effectively controlled.
As shown in fig. 2, the heat dissipation pipes 21 are wound in the circumferential direction, two heat dissipation pipes 21 are arranged at intervals in the radial direction, and the functional pipes 211 of the respective heat dissipation pipes 21 are identical in shape. The structure enables the arrangement of the two radiating pipelines 21 to be reasonable, the length of each radiating pipeline 21 is increased as much as possible, the heat absorption capacity of the heat exchange pipeline is improved, and the temperature of the brake system is effectively controlled.
The four overflowing cavities 11 are respectively a first overflowing cavity, a second overflowing cavity, a third overflowing cavity and a fourth overflowing cavity, the two radiating pipelines 21 are respectively a first radiating pipe and a second radiating pipe, two ports of the first radiating pipe are respectively communicated with the first overflowing cavity and the second overflowing cavity, two ports of the second radiating pipe are respectively communicated with the third overflowing cavity and the fourth overflowing cavity, the first radiating pipe is filled with a first liquid conducting medium, and the second radiating pipe is filled with a second liquid conducting medium.
As shown in fig. 5 to 10, the brake system using the heat dissipation method of the present embodiment includes: a brake mechanism 30 and a heat exchange line 60. The brake mechanism 30 includes a first disc 31 (brake disc) and a second disc 32 (brake pad) arranged opposite to each other, the first disc 31 and the second disc 32 rotate relatively, and an accommodating gap 33 is formed between an outer surface of the second disc 32 and an inner surface of the first disc 31. The heat exchange line 60 is the heat exchange line described above, and the heat dissipation plate 20 of the heat exchange line 60 is disposed in the accommodation gap 33 of the brake mechanism 30. The heat exchange line 60 described above has several advantages: first, the first tray 31 and the second tray 32 are not deformed; secondly, the device is not limited by the environment and is suitable for northern cold areas; thirdly, the cooling effect is good when the cooling device is used in an open space; fourthly, the cost is low; fifthly, no matter the brake system performs normal braking, continuous small-amplitude braking, emergency braking or continuous large-amplitude braking, the heat exchange pipeline 60 can effectively absorb heat generated by the brake mechanism, so that the temperature rise of the brake mechanism is reduced, and the safety is ensured.
During braking, the first disc 31 and the second disc 32 rub against each other to achieve braking.
As shown in fig. 5 to 10, the heat dissipating disc 20 is connected to the first disc body 31, there are two braking mechanisms 30, there are two heat exchanging pipes 60 corresponding to the braking mechanisms 30, and the braking system further includes: a support shaft 40 and two circulating heat dissipating mechanisms 70. The second disc bodies 32 of the two braking mechanisms 30 are pivotally sleeved at two ends of the support shaft 40 through bearings 50, the support shaft 40 is a hollow shaft, the pipeline collecting shafts 10 of the heat exchange pipelines 60 are located in the support shaft 40, four independent annular chambers 1 are respectively arranged between the pipeline collecting shafts 10 of the heat exchange pipelines 60 and the support shaft 40, the side walls of the pipeline collecting shafts 10 and the side walls of the support shaft 40 form the chamber walls of the annular chambers 1, all first overflowing holes 12 of the pipeline collecting shafts 10 respectively correspond to the different annular chambers 1 on the same side of the support shaft 40, so that the four annular chambers 1 on the same side form two groups of liquid exchange chambers 2. Each circulation heat dissipation mechanism 70 includes a circulation pipeline 71, a circulation pump 72 disposed on the circulation pipeline 71, and a radiator 73 disposed on the circulation pipeline 71, the circulation pipeline 71 communicates with the two sets of liquid exchange chambers 2 on both sides of the support shaft 40, and the circulation pipelines 71 of each circulation heat dissipation mechanism 70 are not communicated with each other. In the above structure, the high-temperature refrigerant led out from the heat exchange pipeline 60 can be changed into the low-temperature refrigerant after being radiated by the radiator and then is led into the heat exchange pipeline 60 again in a circulating manner, so that the heat exchange pipeline 60 can continuously radiate heat for the brake mechanism 30, thereby ensuring the heat radiation effect; in addition, the heat pipes flowing the same refrigerant in the two heat exchange pipes 60 are pumped out and dissipated by the same circulating heat dissipating mechanism 70, so that the number of parts of the braking system can be effectively reduced, and the production cost can be reduced. The predetermined direction n is an axial direction of the support shaft 40.
Specifically, the four first overflowing holes 12 are respectively a first via hole, a second via hole, a third via hole and a fourth via hole corresponding to the first overflowing cavity, the second overflowing cavity, the third overflowing cavity and the fourth overflowing cavity, the four annular chambers 1 are respectively a first annular chamber (one of the first seal cavities), a second annular chamber (the other first seal cavity), a third annular chamber (one of the second seal cavities) and a fourth annular chamber (the other second seal cavity), the first annular chamber corresponds to the first via hole, the second annular chamber corresponds to the second via hole, the third annular chamber corresponds to the third via hole, and the fourth annular chamber corresponds to the fourth via hole. The first annular chamber and the fourth annular chamber form a first liquid exchange chamber, the second annular chamber and the third annular chamber form a second liquid exchange chamber, and the circulating heat dissipation mechanism 70 includes a first circulating heat dissipation mechanism communicating the first liquid exchange chambers on the left and right sides of the braking system and a second circulating heat dissipation mechanism communicating the second liquid exchange chambers on the left and right sides of the braking system.
The heat dissipation process is briefly described as follows:
during use, the first liquid conducting medium sequentially passes through the circulating pump 72 of the first circulating heat dissipation mechanism, the left fourth annular chamber, the left fourth via hole, the left fourth overflowing cavity, the first heat dissipation pipe of the left heat dissipation plate, the left first overflowing cavity, the left first via hole, the left first annular chamber, the heat radiator 73 of the first circulating heat dissipation mechanism, the right fourth annular chamber, the right fourth via hole, the right fourth overflowing cavity, the right first heat dissipation pipe of the right heat dissipation plate, the right first overflowing cavity, the right first via hole, the right first annular chamber, the heat radiator 73 of the first circulating heat dissipation mechanism and finally returns to the circulating pump 72 to circulate. The second liquid conducting medium sequentially passes through the circulating pump 72 of the second circulating heat dissipation mechanism, the left third annular chamber, the left third via hole, the left third overflowing cavity, the second heat dissipation pipe of the left heat dissipation disc, the left second overflowing cavity, the left second via hole, the left second annular chamber, the heat dissipater 73 of the second circulating heat dissipation mechanism, the right third annular chamber, the right third via hole, the right third overflowing cavity, the right second heat dissipation pipe of the right heat dissipation disc, the right second overflowing cavity, the right second via hole, the right second annular chamber, the heat dissipater 73 of the second circulating heat dissipation mechanism and finally returns to the circulating pump 72 for circulation. The heat sink of the first circulating heat radiation mechanism and the heat sink of the second circulating heat radiation mechanism may be the same heat sink or different heat sinks. The radiator adopts a parallel flow radiator, and in the parallel flow radiator, heat is radiated to the air through the action of convection and a radiating motor.
When emergency braking or continuous large-amplitude braking is carried out, the disc brake quickly generates high temperature due to violent braking action, the temperature exceeds the boiling point of the first liquid conducting medium, and the first liquid conducting medium is vaporized at the moment, so that the air resistance phenomenon of a pipeline can occur, and the circulation is influenced. In order to solve the above problem, as shown in fig. 5 and 10, two third overflowing holes 41 are provided at the tops of both ends of the support shaft 40, and the third overflowing holes 41 communicate with one of the four annular chambers 1 on the side of the support shaft 40 where the third overflowing hole 41 is located. It should be noted that the annular chamber 1 corresponding to the third overflow aperture 41 should be filled with the first liquid conducting medium. Thus, once the first liquid conductive medium is vaporized, the gas is ejected through the third through-flow hole 41, preventing the occurrence of the vapor lock phenomenon.
As shown in fig. 10, two annular chambers 1 at both ends of the four annular chambers 1 on either side of the support shaft 40 form a group of liquid exchange chambers 2, and the third overflowing hole 41 communicates with one annular chamber 1 of the group of liquid exchange chambers 2. Specifically, a first annular chamber, a second annular chamber, a third annular chamber, and a fourth annular chamber are arranged in this order in the axial direction of the support shaft 40, and the third overflowing hole 41 communicates with the first annular chamber. The first annular chamber and the fourth annular chamber are filled with a first liquid conducting medium, and the second annular chamber and the third annular chamber are filled with a second liquid conducting medium. The above arrangement prevents the first liquid conductive medium from forming a gaseous state in the cross management and effectively vaporizes only at the position of the third overflowing hole 41.
Since part of the first liquid conducting medium is evaporated and discharged from the brake system, a fluid replenishment port is provided in the circulation line 71 communicating with the third overflowing hole 41 in order to replenish the first liquid conducting medium.
As shown in fig. 9 and 10, the inner side walls of the two ends of the support shaft 40 are provided with four annular ribs 100 and a partition 110, and each annular rib 100 is sealed with the corresponding pipeline collecting shaft 10 by a sealing ring 120. The above structure is simple, and the plurality of annular chambers 1 can be effectively separated from each other, and the first liquid conductive medium and the second liquid conductive medium are prevented from being mixed.
It should be noted that, the braking system adopting the heat dissipation method of the present embodiment is not limited to the above structure, and the braking system may include: the two relatively static disk bodies, the surface of the disk body is provided with overflowing grooves, and the overflowing grooves of the two disk bodies are opposite to form a plurality of independent heat dissipation pipelines. When braking, the two disc bodies are clamped by the calipers so that the disc bodies can not rotate any more.
A vehicle (not shown) adopting the heat dissipation method includes a vehicle body and a brake system. The braking system is arranged on the vehicle body and is the braking system. Since the brake system has the advantage of low temperature rise, the vehicle with the brake system has high safety.
The vehicle further comprises a water storage tank, the water storage tank is arranged on the vehicle body and is communicated with a liquid supplementing opening of a circulating pipeline 71 of a circulating heat radiating mechanism 70 of the braking system, and liquid in the water storage tank flows into the circulating pipeline 71 through the liquid supplementing opening under the action of negative pressure. Above-mentioned structure makes first liquid conduction medium can rely on the automatic interpolation of negative pressure, does not need the manual work or sets up other pump bodies to reduction in production cost.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of dissipating heat from a disc-type passenger car brake mechanism comprising a first disc (31) and a second disc (32) arranged in opposition, wherein a plurality of independent heat-dissipating ducts (21) are provided between an inner surface of the first disc (31) and an outer surface of the second disc (32), the method comprising:
step S10: refrigerants are injected into the heat dissipation pipelines (21), the specific heat capacities of the refrigerants in at least two heat dissipation pipelines (21) are different, and the boiling point of the refrigerant with the small specific heat capacity is high;
step S20: guiding out the refrigerant in each heat dissipation pipeline (21) and reducing the temperature of the refrigerant through a radiator (73);
step S30: and the cooled refrigerant is re-injected into the corresponding heat dissipation pipeline (21) to form circulation.
2. The method for dissipating heat from a disc type truck-passenger car brake mechanism as claimed in claim 1, wherein the difference between the specific heat capacity of the refrigerant in one of the heat dissipating pipes (21) and the specific heat capacity of the refrigerant in the other heat dissipating pipe (21) is 1.8J/(kg-k).
3. The method for dissipating heat from a disc truck passenger vehicle brake mechanism as claimed in claim 1, wherein the step S10 comprises: and water is injected into one of the heat dissipation pipelines (21), and glycol, industrial salt or glycerol water is injected into the other heat dissipation pipeline (21).
4. The method for dissipating heat of a disc type truck passenger car brake mechanism according to claim 1, wherein the heat dissipating pipe (21) extends in a circumferential direction centering on an axis of the first disc body (31), a plurality of the heat dissipating pipes (21) are arranged at intervals in a radial direction of the first disc body (31), and the step S10 includes: injecting a first liquid conductive medium into the heat dissipation pipe (21) located on the outer side, and injecting a second liquid conductive medium into the heat dissipation pipe (21) located on the inner side, wherein the specific heat capacity of the first liquid conductive medium is larger than that of the second liquid conductive medium.
5. The method for dissipating heat of a disc type truck-passenger car brake mechanism as claimed in claim 1, wherein each of the heat dissipating pipes (21) comprises an inlet and an outlet, and the refrigerant in the heat dissipating pipe (21) is led out from the outlet by a circulating pump (72) and is injected into the heat dissipating pipe (21) from the inlet to form a circulation by the circulating pump (72).
6. The method for dissipating heat from a disc type truck-passenger car brake mechanism as claimed in claim 1, wherein said step S20 comprises:
step S21: guiding the refrigerant in each heat dissipation pipeline (21) into a plurality of corresponding first sealed cavities;
step S22: leading out gas in a first sealing cavity corresponding to a refrigerant with the largest specific heat capacity;
step S23: the refrigerant in each first sealed cavity is led out to a radiator (73).
7. The method for dissipating heat from a disc type truck-passenger car brake mechanism as claimed in claim 6, wherein said step S22 further comprises: and supplementing the refrigerant to the flow path where the refrigerant with the largest specific heat capacity is located while the gas is led out.
8. The method for dissipating heat from a disc type truck-passenger car brake mechanism as claimed in claim 6, wherein said step S30 comprises:
step S31: injecting the cooled refrigerants of the flow paths into the corresponding second sealing cavities;
step S32: and the refrigerant in each second sealed cavity is re-injected into the corresponding heat dissipation pipeline (21).
9. The method for dissipating heat of a disc type truck-passenger car brake mechanism according to claim 8, wherein the plurality of first seal cavities and the plurality of second seal cavities are arranged in a gapless manner along a preset direction n, and the first seal cavity and the second seal cavity corresponding to the refrigerant with the largest specific heat capacity are arranged at two ends of the other first seal cavity and the other second seal cavity.
10. The method for dissipating heat from a disc truck passenger vehicle brake mechanism as claimed in claim 1, wherein the step S20 comprises: the temperature of the refrigerant led out from each heat radiation pipeline (21) is reduced by the same radiator (73).
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CN202211191686.8A CN115419667A (en) | 2022-09-28 | 2022-09-28 | Heat dissipation method for disc type truck and passenger car brake mechanism |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116456704A (en) * | 2023-06-14 | 2023-07-18 | 中山市精研科技有限公司 | Liquid crystal display television with high heat dissipation efficiency |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116456704A (en) * | 2023-06-14 | 2023-07-18 | 中山市精研科技有限公司 | Liquid crystal display television with high heat dissipation efficiency |
CN116456704B (en) * | 2023-06-14 | 2023-08-15 | 中山市精研科技有限公司 | Liquid crystal display television with high heat dissipation efficiency |
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