CN104192101B - A kind of disc type vehicle brake heat pipe temperature uniforming heat radiation device - Google Patents

Abstract

The invention discloses a heat pipe heat dissipation device for a disc vehicle brake, which comprises a brake disc composed of two oppositely arranged brake discs, and ring-shaped heat pipes are respectively arranged on the opposing surfaces of the two brake discs. Array, the heat pipe array is fixed on the brake disc in a surface contact manner through the heat pipe grooves opened on the brake disc. This device does not need an additional auxiliary power source to maintain the operation of the heat pipe, and at the same time does not need to add additional moving parts in the brake disc, which has high reliability and avoids the probability of failure of moving parts due to wear and collision. The structure of the existing brake disc is fully utilized, and heat pipe grooves are provided in the air duct between the opposite surfaces of the brake disc, without changing the overall structure of the brake disc, with strong adaptability, simple process and low cost. The technical means of the device is simple and easy to implement, the brake disc has good temperature uniformity, low surface average and instantaneous temperature, simple structure, high reliability and convenient installation.

Description

Heat pipe uniform temperature heat dissipation device for disc vehicle brake

technical field

The invention relates to a disc-type vehicle brake, in particular to a heat-pipe heat-dissipating device for the disc-type vehicle brake.

Background technique

With the rapid development of highways and the increasing number of vehicles, traffic accidents are also increasing. According to relevant survey statistics, in the traffic accidents caused by the problems of the vehicle itself.

The braking system is an important part of the vehicle, which directly affects the safety of the vehicle. Among them, the disc brake passes through a disc (that is, the brake disc) that is fixed to the tire and rotates at the same speed. When braking, the oil pressure is used to push the piston in the brake caliper to generate braking force, and contact with the "disc" to generate friction, and finally make the vehicle Stop, because of its light weight, simple structure, convenient adjustment, stable braking effect, good thermal stability and water stability, it is widely used in miniature vehicles.

However, the failure rate of this braking system is also relatively high, which is mainly manifested in "thermal decline of braking efficiency" and "brake fatigue damage". During the braking process of disc vehicle brakes, the instantaneous maximum temperature on the surface of the brake can reach more than 600 °C. At the same time, there is an obvious gradient in the surface temperature of the brake disc in the radial direction. The rapid spread of the periphery will cause the surface temperature of the brake disc to be uneven, and the local temperature will be too high, which will easily lead to defects such as brake failure or failure.

Contents of the invention

The object of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a heat pipe heat dissipation device for disc vehicle brakes, which effectively solves the problem that the surface temperature of the disc brake disc of the disc vehicle brake in the prior art exists along the radial direction. Obvious gradient, and the instantaneous temperature and average temperature are high, which leads to the problem of obvious thermal degradation of brake braking performance.

The present invention realizes through following technical scheme:

A heat pipe heat dissipation device for a disc vehicle brake, comprising a brake disc composed of two oppositely arranged brake discs 1, and heat pipe arrays arranged in a ring shape are respectively arranged on the opposing surfaces of the two brake discs 1, The heat pipe array is fixed on the brake disc 1 in a surface contact manner through the heat pipe grooves 11 provided on the brake disc. The inner periphery of the brake disc 1 is provided with a plurality of cooling holes 6 arranged in a ring shape. The inner peripheral wall of the heat pipe has a sintered layer.

The heat pipe array is composed of a plurality of straight heat pipes 8 or a plurality of U-shaped heat pipes 9 .

Radiating fins 10 are arranged on the tube body of the U-shaped heat pipe 9 ; or a porous heat dissipation structure 12 is arranged between two opposing tube bodies of the U-shaped heat pipe 9 .

The fixing method between the heat pipe and the brake disc 1 adopts pressure riveting, screws or soldering.

The tube body material of the heat pipe is copper, its two ends are sealed, and the working fluid filled inside is deionized water, naphthalene or N-methylpyrrolidone.

The U-shaped heat pipe 9 and the cooling fin 10 are fixedly connected by pressure riveting or soldering.

The U-shaped heat pipe 9 and the porous heat dissipation structure 12 are fixedly connected by pressure riveting or soldering.

Compared with the prior art, the present invention has the following advantages and effects:

The heat pipe uniform temperature cooling device is provided with a heat pipe array arranged in a ring on the opposite surface of the brake disc, and the heat pipe array is fixed on the brake disc in a surface contact manner through the heat pipe grooves opened on the brake disc. This structural feature achieves the purpose of reducing the instantaneous maximum temperature on the surface of the brake disc, reducing the radial temperature gradient on the surface of the brake disc, and reducing the average temperature on the surface of the brake disc.

In addition to the temperature uniformity of the heat pipe, the heat dissipation fins and porous heat dissipation structure on the heat pipe also increase the heat dissipation area, further improve the heat dissipation area, and reduce the temperature of the brake disc.

Since the brake disc will continue to rotate with the movement of the vehicle, the ambient air will enter the brake disc from part of the air duct between the surfaces of the brake disc, and return to the environment from the rest of the air duct and the cooling holes arranged in a ring shape. At the same time, it takes away the heat from the upper and lower surfaces of the brake disc, heat pipes, heat dissipation fins and porous heat dissipation materials to cool them.

The heat pipe uniform temperature cooling device does not need an additional auxiliary power source to maintain the operation of the heat pipe, and at the same time does not need to add additional moving parts in the brake disc, which has high reliability and avoids the probability of failure of moving parts due to wear and collision.

This heat pipe heat dissipation device makes full use of the structure of the existing brake disc, and sets a heat pipe groove in the air duct between the opposite surfaces of the brake disc, without changing the overall structure of the brake disc, with strong adaptability, simple process and low cost .

The heat pipe uniform temperature cooling device has simple technical means, good temperature uniformity of the brake disc, low surface average and instantaneous temperature, simple structure, high reliability and convenient installation.

Description of drawings

Figure 1 is a schematic diagram of the overall appearance of the heat pipe uniform temperature cooling device for disc vehicle brakes

Figure 2 is an exploded top view of the heat pipe heat dissipation device for disc vehicle brakes

Figure 3 is an exploded isometric view of the heat pipe uniform temperature cooling device for disc vehicle brakes

Figure 4 is a front view of the brake disc structure

Figure 5 is a sectional view of A-A in Figure 4

Figure 6 is a schematic diagram of a U-shaped heat pipe circumferential array

Figure 7 is a schematic diagram of a combination of U-shaped heat pipes and cooling fins

Figure 8 is a schematic diagram of the U-shaped heat pipe + circular array of cooling fins

Figure 9 is a schematic diagram of the combination of U-shaped heat pipe + porous heat dissipation structure

Figure 10 is a schematic diagram of a U-shaped heat pipe + a circular array of porous heat dissipation structures

Numbers in the figure: 1 is the brake disc, 2 is the brake caliper, 3 is the fixed bracket of the brake caliper, 4 is the friction plate, 5 is the wheel hub, 6 is the cooling hole, 7 is the piston, 8 is the straight heat pipe (that is, "one "-shaped heat pipe), 9 is a U-shaped heat pipe, 10 is a cooling fin, 11 is a heat pipe groove, and 12 is a porous heat dissipation structure.

detailed description

The present invention will be described in further detail below in conjunction with specific embodiments.

Example

As shown in Figure 1 to Figure 10. The heat pipe uniform temperature cooling device for disc vehicle brakes of the present invention comprises a brake disc composed of two oppositely arranged brake discs 1; heat pipe arrays arranged in a ring shape are respectively arranged on the opposing surfaces of the two brake discs 1, The heat pipe array is fixed on the brake disc 1 in a surface contact manner through the heat pipe grooves 11 provided on the brake disc. The inner periphery of the brake disc 1 is provided with a plurality of cooling holes 6 arranged in a ring shape.

As shown in Figure 2 and 6. The heat pipe array is composed of a plurality of straight heat pipes 8 or a plurality of U-shaped heat pipes 9 .

As shown in Figure 7 and 8. Radiating fins 10 are arranged on the body of the U-shaped heat pipe 9 .

As shown in Figures 9 and 10. A porous heat dissipation structure 12 may also be provided between two opposing pipe bodies of the U-shaped heat pipe 9 .

The fixing method between the heat pipe and the brake disc 1 adopts pressure riveting (to realize interference fit), screws or soldering. Pressure riveting type, which has high connection reliability; screw-fixed type, which allows repeated disassembly; soldering type, that is, the heat pipe is soldered to the nickel-plated brake disc, and this method has small contact thermal resistance.

The material of the heat pipe body is copper, its two ends are sealed, and the working fluid filled inside is deionized water, naphthalene or N-methylpyrrolidone, and the temperature difference between the cold ends of the heat pipe cannot exceed 20°C . The internal peripheral wall of the heat pipe has a sintered layer to increase heat transfer efficiency.

The U-shaped heat pipe 9 and the cooling fin 10 are fixedly connected by pressure riveting or soldering.

The U-shaped heat pipe 9 and the porous heat dissipation structure 12 may also be fixedly connected by pressure riveting or soldering.

The various schemes mentioned above can be used in any combination according to actual needs, the number and arrangement position of heat pipes and heat pipe grooves are also variable, and the material selection and structure of heat dissipation fins and porous heat dissipation structures are also variable. of.

When the vehicle brakes during operation, the hydraulic oil pushes the piston in the brake caliper to move, so that the friction plate contacts the surface of the brake disc 1, and friction occurs, thereby providing braking force for the vehicle, and at the same time, the brake disc produces friction A large amount of heat is generated instantly in the area of the brake disc, which gradually spreads to the entire surface of the brake disc, and the temperature of the brake disc rises. At this time, the heat pipe connects the high temperature area (where friction occurs) and the low temperature area (away from friction) of the brake pad. The working medium is cooled and liquefied in the condensation section of the heat pipe, and returns to the evaporation section to complete the working cycle.

During this cycle, the heat in the high temperature area is quickly transferred to the low temperature area through the heat pipe, which improves the temperature uniformity of the entire brake disc. In addition, the heat dissipation fins or porous heat dissipation structure on the heat pipe further increase the heat dissipation area and reduce the temperature of the brake disc. Since the brake disc will continue to rotate with the movement of the vehicle, the ambient air will enter the brake disc from part of the air duct between the upper and lower surfaces of the brake disc, and return to the environment from the rest of the air duct and cooling holes, while taking away the brake air. The upper and lower surfaces of the moving plate, heat pipes, heat dissipation fins and heat from the porous heat dissipation structure are used to cool it.

As described above, the present invention can be preferably carried out.

The implementation of the present invention is not limited by the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods, and are all included in within the protection scope of the present invention.

Claims (5)

1. a kind of disc type vehicle brake heat pipe temperature uniforming heat radiation device, including two brake discs (1) being oppositely arranged are constituted Brake disc, it is characterised in that：Respectively provided with the heat pipe array annularly arranged, heat on the opposite face of two brake discs (1) Pipe array is fixed on brake disc (1) by way of the corrugated heat pipe (11) opened up on brake disc is contacted with face；

The high-temperature region of the heat pipe array connection brake disc (1) and low-temperature space；When braking maneuver occurs in the process of running for vehicle When, the working medium in high-temperature area heat pipe evaporator section flows to condensation segment by endothermic gasification, and low-temperature region working medium is in heat pipe condenser section Interior cooling liquid, and evaporator section is back to, complete the working cycles of working medium；

Heat pipe array is made up of many U-shaped heat pipes (9)；

Radiating fin (10) is provided with the body of U-shaped heat pipe (9)；

Porous radiator structure (12) is provided between two relative bodys of U-shaped heat pipe (9)；The inner circumferential of the brake disc (1) Offer multiple heat emission holes (6) annularly arranged；

The body material of heat pipe is copper, the sealing of its two ends and the internal working medium filled are deionized water, naphthalene with or N- methyl pyrroles Press against alkanone.

2. disc type vehicle brake according to claim 1 heat pipe temperature uniforming heat radiation device, it is characterised in that：Heat pipe is with stopping Fixed form between hull (1) uses squeezing-rivet type, screw or soldering.

3. disc type vehicle brake according to claim 1 heat pipe temperature uniforming heat radiation device, it is characterised in that：The pipe of heat pipe Internal perisporium has sinter layer.

4. disc type vehicle brake according to claim 1 heat pipe temperature uniforming heat radiation device, it is characterised in that：U-shaped heat pipe (9) it is fixedly connected between radiating fin (10) using squeezing-rivet type or soldering formula.

5. disc type vehicle brake according to claim 4 heat pipe temperature uniforming heat radiation device, it is characterised in that：U-shaped heat pipe (9) it is fixedly connected between porous radiator structure (12) using squeezing-rivet type or soldering formula.