CN115789134A - Composite material shaft-mounted brake disc suitable for rail transit vehicle - Google Patents

Abstract

The invention discloses a composite material shaft-mounted brake disc suitable for rail transit vehicles, which comprises a support body and two composite material friction rings, wherein a plurality of heat dissipation ribs are arranged on two side surfaces of the support body, a plurality of support body through holes are formed in the support body, a three-dimensional ventilation air channel is arranged in the brake disc and comprises a radial through air channel and an axial through air channel, at least part of the support body through holes are positioned in the middle of the heat dissipation ribs, the heat dissipation ribs have different lengths, at least one part of the radial through air channel is formed between the heat dissipation ribs, at least one part of the axial through air channel is formed at the inner side circumference of the support body, the axial through air channel is communicated with the radial through air channel, and the radial through air channel is communicated with the axial through air channel to finally form the three-dimensional ventilation air channel, so that the integral rapid cooling of the brake disc is realized.

Description

Composite material shaft-mounted brake disc suitable for rail transit vehicle

Technical Field

The invention relates to the field of rail transit, in particular to a composite material shaft-mounted brake disc suitable for rail transit vehicles.

Background

The traditional steel brake disc is applied to a high-speed train with the speed of 350km per hour, the disc surface temperature is close to the material use limit during emergency braking, and the problems of hot spots and thermal fatigue cracks are easy to occur after long-term application. And the steel brake disc has larger mass, which is not beneficial to the weight reduction requirement of the train, in particular to the weight reduction of the unsprung mass of the bogie. With the increasing running speed of vehicles, the demands of reducing running energy consumption and braking energy are higher, and the demands of reducing the unsprung mass of the bogie are higher. There is a need to develop a lightweight, highly heat resistant brake disc to match the high speed and lightweight development trends of the rail transportation industry.

Carbon pottery combined material commonly used at present is used for making high-speed railway brake disc, and carbon pottery is a kind of ceramic matrix composite, and carbon pottery material not only has high strength, high modulus, high rigidity, shock-resistant, anti-oxidant, high temperature resistant, acid and alkali-resistance and the chemical substance of high performance pottery and corrodes advantages such as little, the specific gravity light of thermal expansion coefficient, has still overcome shortcomings such as general ceramic material's fragility is big, function singleness simultaneously completely, is the high temperature structural material and the friction material of the thought in the world admittedly. But the integrated carbon ceramic brake disc has the safety problem when being used for a high-speed train. The carbon ceramic material has low strength, is difficult to bear the vibration impact load of the high-speed wheel rail, and is difficult to bear larger braking pressure and braking torque. From the top, the layering combined type carbon pottery axle dress brake disc is the main structural style that adopts of high speed train axle dress brake disc.

Patent CN109869423A proposes a carbon pottery axle dress brake disc suitable for high-speed EMUs, has adopted thermal-insulated combined type structure, and the centre has set up the steel and has kept apart the supporter, and steel supporter both sides set up thermal-insulated ceramic coating, and two carbon pottery friction bodies are through inside and outside both sides fastening connection. However, the carbon ceramic friction body in the patent adopts a two-side fastening mode, so that the whole structure is poor in ventilation and heat dissipation performance, large in processing difficulty and high in manufacturing cost, and heat insulation measures are not adopted for fastening connection between the carbon ceramic friction body and the steel isolation support body, so that a bolt is easy to lose efficacy during high-speed and high-power braking, and driving safety is affected.

Patent CN108317194A discloses a shaft-mounted brake disc assembly for high-speed trains, comprising a brake disc, a support disc and a hub; the brake discs are arranged in two groups, coaxially overlapped on the disc surfaces at the two sides of the support disc and clamped and locked with the support disc through a first connecting structure; the brake disc is a composite material brake disc with flat disc surfaces on two sides, and the disc surfaces on the two sides of the support disc are provided with heat dissipation structures which are stacked with the brake disc to form a heat dissipation channel; the inner ring of the supporting disk is provided with a connecting flange and is fixedly sleeved with the disk hub through a second connecting structure. However, the support disc in the patent has a complex structure, large manufacturing difficulty and poor heat dissipation effect, and the fastening connection between the carbon ceramic friction body and the steel isolation support body does not adopt heat insulation measures.

The present invention has been made in view of the above problems.

Disclosure of Invention

The invention mainly aims to provide a composite material shaft-mounted brake disc suitable for rail transit vehicles, which adopts a composite structure with high ventilation and heat dissipation performance, and can further improve the connection reliability and the service life of the brake disc.

In order to achieve the purpose, the invention provides a composite material shaft-mounted brake disc suitable for a rail transit vehicle, which comprises a support body and two composite material friction rings, wherein the two composite material friction rings are arranged on two sides of the support body, a plurality of radiating ribs are arranged on two sides of the support body, a plurality of support body through holes are formed in the support body, a three-dimensional ventilation air channel is arranged in the brake disc, the three-dimensional ventilation air channel comprises a radial through air channel and an axial through air channel, at least part of the support body through holes are located in the middle of the radiating ribs, the radiating ribs have different lengths, at least one part of the radial through air channel is formed between the radiating ribs, the composite material friction rings can transmit heat to the support body, the support body radiates heat through the radial through air channel, at least one part of the axial through air channel is formed at the inner circumference of the support body, and the axial through air channel is communicated with the radial through air channel.

Further, the supporter is including being annular supporter body and being located a plurality of inboard connection claws of supporter body inboard, and heat dissipation muscle and supporter through-hole all are located the supporter body.

Furthermore, the length of the heat dissipation rib is matched with the position of the inner side connecting claw on the support body.

Furthermore, the composite material shaft-mounted brake disc comprises a connecting piece, the supporting body through hole comprises a connecting piece through hole, and the connecting piece penetrates through the connecting piece through hole and is detachably connected with the supporting body and the composite material friction ring.

Further, the heat dissipation rib comprises a connecting piece through hole heat dissipation rib, the connecting piece through hole is located in the middle of the connecting piece through hole heat dissipation rib, a connecting piece through hole boss is formed around the connecting piece through hole, the connecting piece through hole boss forms a part of the connecting piece through hole heat dissipation rib, and the connecting piece through hole boss is as high as the connecting piece through hole heat dissipation rib.

Further, the connecting piece through hole heat dissipation ribs are distributed on the support body along the radial direction, and the radius where the connecting piece through hole heat dissipation ribs are located is located between the radii where the adjacent inner side connecting claws are located.

Further, the connector through-hole heat dissipating ribs have the longest length among all the heat dissipating ribs.

Furthermore, the inner circumference of the support body comprises an open area and a blocking area, the blocking area is an area where the inner connecting claws are located, the open area is an area between the inner connecting claws, and the open area forms a part of an open area of a radial through air duct and an axial through air duct which are communicated with the inside of the composite material shaft-mounted brake disc, and the length of the open area on the inner circumference of the support body is 50-70%.

Furthermore, combined material axle dress brake disc includes clamping ring and dish hub, and the outside of dish hub has a plurality of rings and connects the claw, and the outside of clamping ring has a plurality of profile of tooth, and claw, profile of tooth and inboard connection claw one-to-one are connected to the ring, and claw, profile of tooth and inboard connection claw are connected to the ring, clamping ring, dish hub and supporter detachably connect.

Further, the outer circumference of the pressure ring comprises an open area and a blocking area, the blocking area is an area where the tooth shapes are located, the open area is an area between the tooth shapes, the open area forms a part of an axial through air channel leading to the interior of the composite material shaft-mounted brake disc, and the open area occupies 50-70% of the outer circumference of the pressure ring.

Furthermore, the outer circumference of the hub and the outer circumference of the hub also comprise an open area and a blocking area, the blocking area is an area where the annular connecting claws are located, the open area is an area between the annular connecting claws, the open area forms a part of an axial through air duct leading to the interior of the composite material shaft-mounted brake disc, and the length occupied by the open area on the outer circumference of the hub is 50-70%.

Furthermore, the composite material shaft-mounted brake disc comprises a positioning piece, the support body through hole comprises a positioning piece through hole, and the positioning piece is arranged in the positioning piece through hole to enable the radial positions of the support body and the at least one composite material friction ring to be relatively fixed.

Furthermore, the heat dissipation rib comprises a positioning piece through hole heat dissipation rib, the positioning piece through hole is positioned in the middle of the positioning piece through hole heat dissipation rib, a positioning piece through hole boss is formed around the positioning piece through hole, the positioning piece through hole boss forms a part of the positioning piece through hole heat dissipation rib, and the positioning piece through hole boss is as high as the positioning piece through hole heat dissipation rib.

Further, the heat dissipation muscle still includes short heat dissipation muscle and long heat dissipation muscle, and connecting piece through-hole heat dissipation muscle, setting element through-hole heat dissipation muscle, short heat dissipation muscle and long heat dissipation muscle are all along radial setting on the supporter body, and the radius at short heat dissipation muscle place coincides with the radius at inboard connector lug place, and short heat dissipation muscle has the shortest length in all heat dissipation muscle, and the setting element through-hole heat dissipation muscle of long heat dissipation muscle is located between short heat dissipation muscle and the connecting piece through-hole heat dissipation muscle.

Further, still include thermal-insulated gasket, thermal-insulated gasket sets up between connecting piece and combined material friction ring, and thermal-insulated gasket hinders the heat transfer on the combined material friction ring to the connecting piece.

Further, the connecting piece is a bolt and a locknut.

Furthermore, the composite material friction ring is a ring-shaped element made of carbon ceramic, and the support body is a steel support body.

By applying the technical scheme of the invention, at least the following beneficial effects are realized:

1. through set up four kinds of heat dissipation muscle and inboard connection claw that length is different on the supporter, design the profile of tooth on the clamping ring, design the hoop connection claw on the dish hub, formed by radially link up the wind channel and axially link up the three-dimensional cooling system that runs through the brake disc that the wind channel formed to realize the whole rapid cooling of brake disc.

2. The connecting piece through hole boss and the positioning piece through hole boss are designed to be part of the heat dissipation ribs, and the friction ring is connected with the support body in a middle fastening mode, so that the overall ventilation and heat dissipation performance of the brake disc is further enhanced.

3. The connecting piece sets up thermal-insulated gasket when connecting, hinders on heat transfer to the connecting piece, guarantees the product fastening connection reliability simultaneously.

4. The composite material friction ring is designed into a simple ring-shaped piece, the whole structure of the brake disc is simple, the manufacturing difficulty is reduced, the friction ring is made of carbon-ceramic composite materials, the weight of the friction ring is reduced by more than 1/3 compared with that of an all-steel brake disc, the unsprung mass of a high-speed train is reduced, the light-weighted trend of the high-speed train is met, and the brake disc is suitable for the motor train unit train with the speed per hour of 400 kilometers and above.

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 shows a schematic view of a brake disc according to an embodiment of the invention;

FIG. 2 shows a schematic view of a support body of an embodiment of the invention;

FIG. 3 shows a front view of a support body of an embodiment of the invention;

FIG. 4 shows a brake disk assembly cross-sectional view of an embodiment of the present invention;

FIG. 5 shows a front view of a connector of an embodiment of the present invention;

FIG. 6 illustrates a cross-sectional view of a spacer installation in accordance with an embodiment of the present invention;

FIG. 7 shows a schematic view of a composite friction ring of an embodiment of the present invention;

FIG. 8 illustrates a front view of a composite friction ring of an embodiment of the present invention;

FIG. 9 illustrates a rear view of a composite friction ring of an embodiment of the present invention;

figure 10 shows a schematic view of a pressure ring of an embodiment of the invention;

FIG. 11 shows a front view of a pressure ring according to an embodiment of the invention;

FIG. 12 shows a hub schematic of an embodiment of the present invention;

FIG. 13 shows an exploded view of a brake disc assembly of an embodiment of the present invention;

fig. 14 shows a schematic view of a three-dimensional ventilation duct of a brake disc according to an embodiment of the present invention, wherein (a) is a pressure ring side; and (b) is the hub claw side.

Wherein the figures include the following reference numerals:

1. a support body; 11. heat dissipation ribs; 111. the connecting piece through hole radiating rib; 112. the positioning piece through hole is provided with a heat dissipation rib; 113. short heat dissipation ribs; 114. long heat dissipation ribs; 1110. a connecting piece through hole boss; 1120. a boss of the positioning piece through hole; 12. a support body through hole; 121. a connector through hole; 122. a locating piece through hole; 13. a support body; 14. an inner connecting claw; 2. a composite friction ring; 21. a locating piece hole; 22. a connector hole; 3. a connecting member; 31. a bolt; 32. a locknut; 4. pressing a ring; 41. tooth profile; 5. a hub; 51. a circular connecting claw; 6. a positioning member; 7. a heat insulating spacer; 8. a bolt assembly; 10. an open area; 20. a blocking region.

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.

The present invention is described in further detail below with reference to specific examples, which are not to be construed as limiting the scope of the invention as claimed. The term "comprising" when used indicates the presence of a feature but does not preclude the presence or addition of one or more other features; the terms "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention; furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description, it is to be noted that, unless expressly specified or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example (b):

in order to meet the use requirement of a high-speed train with the speed per hour of more than 350km/h, reduce the unsprung mass of the train, realize energy conservation and emission reduction and ensure the safe operation of the train, the invention provides the carbon-ceramic composite material shaft-mounted brake disc suitable for the high-speed train, and the composite structure with high ventilation and heat dissipation performance is adopted, so that the connection reliability and the service life of the brake disc can be greatly improved, and the long-term reliability of the operation of the high-speed train is ensured.

As shown in fig. 1, the present application provides a composite material shaft-mounted brake disc suitable for rail transit vehicles, which includes a support body 1 and two composite material friction rings 2, wherein the two composite material friction rings 2 are installed on two sides of the support body 1. The two sides of the support body 1 are symmetrical, and the two composite material friction rings 2 are mirror images of each other. The composite material shaft-mounted brake disc further comprises a pressing ring 4 and a disc hub 5, wherein the support body 1 and the composite material friction rings 2 on two sides of the support body are installed on the disc hub 5 and fastened by the pressing ring 4 and a bolt assembly 8, so that the assembly of the integral brake disc is completed.

The brake disc is internally provided with a three-dimensional ventilation air duct which comprises a radial through air duct and an axial through air duct.

As shown in fig. 2, a plurality of heat dissipation ribs 11 are provided on both sides of the support body 1, the heat dissipation ribs 11 having different lengths (i.e., the heat dissipation ribs are arranged in a radial direction of the brake disk). Form radially lining up at least partly in wind channel between the heat dissipation muscle, combined material friction ring 2 can be with heat transfer to supporter 1, and supporter 1 dispels the heat through radially lining up the wind channel, the inboard circumference department of supporter constitutes at least partly of axial through wind channel, the axial through wind channel with radially lining up the wind channel and being linked together.

The support body 1 is further provided with a plurality of support body through holes 12, and at least part of the support body through holes 12 are located in the middle of the heat dissipation ribs 11. Preferably, all the support body through holes 12 are located at the middle of the heat dissipation rib 11.

The phrase "the support body through hole 12 is located in the middle of the heat dissipation rib 11" means that the position of the support body through hole 12 is not located at the end of the heat dissipation rib 11, or is located outside the heat dissipation rib 11, and the through air duct inside the brake disc is not significantly affected.

Preferably, the heat dissipating ribs 11 in the present application are uniformly distributed along the circumferential direction of the support body 1. The heat dissipation ribs play a role in supporting and positioning the friction ring, simultaneously ensure ventilation and heat dissipation of the brake disc, and keep the brake disc to have certain strength and rigidity.

The support body 1 includes a support body 13 in an annular shape and a plurality of inner side connecting claws 14 located inside the support body 13, and the heat dissipation ribs 11 and the support body through holes 12 are all located in the support body 13.

Based on the structure of the support body, the inner circumference of the support body 13 comprises an open area 10 and a blocking area 20, the blocking area 20 is the area where the inner connecting claws 14 are located, the open area 10 is the area between the inner connecting claws 14, the open area 10 forms a part of a radial through air duct and an axial through air duct which are open to the inside of the composite material shaft-mounted brake disc, and the length occupied by the open area 10 on the inner circumference of the support body 13 is 50-70%. Because the open area 10 occupies a relatively large area on the inner circumference of the support body 13, air flow can smoothly enter and exit between the heat dissipation ribs inside the brake disc through the open area 10, and the heat dissipation effect of the brake disc is ensured.

Referring to fig. 2 and 3, the support body through hole 12 includes a connector through hole 121 and a positioning member through hole 122, and correspondingly, the heat dissipation rib 11 includes a connector through hole heat dissipation rib 111 and a positioning member through hole heat dissipation rib 112.

Specifically, the connector through-hole 121 is located in the middle of the connector through-hole heat dissipation rib 111, and a connector through-hole boss 1110 is formed around the connector through-hole 121, the connector through-hole boss 1110 forms a part of the connector through-hole heat dissipation rib 111, and the connector through-hole boss 1110 is the same as the connector through-hole heat dissipation rib 111 in height. The connector through-hole heat dissipating ribs 111 are radially distributed on the support body 13, and the radii of the connector through-hole heat dissipating ribs 111 are located between the radii of the adjacent inner connecting claws 14. The connector through-hole heat dissipation ribs 111 have the longest length among all the heat dissipation ribs 11.

The positioning member through hole 122 is located in the middle of the positioning member through hole heat dissipation rib 112, and a positioning member through hole boss 1120 is formed around the positioning member through hole 122, the positioning member through hole boss 1220 forms a part of the positioning member through hole heat dissipation rib 112, and the positioning member through hole boss 1120 and the positioning member through hole heat dissipation rib 112 have the same height.

The connecting piece through hole boss and the positioning piece through hole boss are designed to be part of the heat dissipation ribs, and the overall ventilation and heat dissipation performance of the brake disc is further improved.

In addition, the heat dissipation rib 11 further includes a short heat dissipation rib 113 and a long heat dissipation rib 114, the connecting member through hole heat dissipation rib 111, the positioning member through hole heat dissipation rib 112, the short heat dissipation rib 113 and the long heat dissipation rib 114 are all radially disposed on the support body 13, a radius of the short heat dissipation rib 113 is coincident with a radius of the inner side connecting claw 14, the short heat dissipation rib 113 has a shortest length among all the heat dissipation ribs 11, and the long heat dissipation rib 114 and the positioning member through hole heat dissipation rib 112 are located between the short heat dissipation rib 113 and the connecting member through hole heat dissipation rib 111.

In summary, the length of the heat dissipating ribs 11 in the present application is adapted to the position of the inner connecting claws 14 on the support body 13. The term "adapted" here means that the length of the heat dissipating ribs is adjusted accordingly depending on the position of the inner connecting claw on the support body. Specifically, referring to fig. 3, the longest connecting piece through hole heat dissipation rib is arranged in an open area without an inner side connecting claw, the shortest short heat dissipation rib is arranged at the position where the inner side connecting claw blocks the area to be the largest, and long heat dissipation ribs and positioning piece through hole heat dissipation ribs are arranged at other positions, so that the maximization of the length of the heat dissipation ribs on the support body is ensured, and the whole ventilation and heat dissipation performance of the brake disc is enhanced due to the fact that the heat dissipation ribs and the inner side connecting claw do not interfere with each other.

As shown in fig. 4, the composite shaft-mounted brake disc further includes a connecting member 3, and the connecting member 3 detachably connects the support body 1 and the composite friction ring 2 by passing through the connecting member through-hole 121 and the connecting member hole 22 of the composite friction ring 2. Preferably, the connecting member 3 may employ a combination of a bolt 31 and a locknut 32 as shown in the right side of fig. 4. The bolt 31 and the locknut 32 are shaped as shown in fig. 5.

This application sets up thermal-insulated gasket 7 between connecting piece 3 and combined material friction ring 2, and thermal-insulated gasket 7 hinders heat transfer to connecting piece 3 on the combined material friction ring 2. The connecting piece sets up thermal-insulated gasket when connecting, hinders on heat transfer to the connecting piece, adopts locknut simultaneously, improves the product fastening connection reliability.

As shown in fig. 6, the positioning member 6 is disposed in the positioning member through hole 122 of the support body 1, so that the radial positions of the support body 1 and the at least one composite material friction ring 2 are relatively fixed. Preferably, the radial positions of the support body 1 and the two composite friction rings 2 are fixed relative to each other by means of the positioning element 6.

As shown in fig. 7, 8 and 9, the retainer holes 21 and the connector holes 22 are provided in the two composite friction rings 2, respectively. The composite material friction ring is designed into a simple annular piece, and the whole brake disc is simple in structure, so that the manufacturing difficulty is reduced. In the embodiment, the composite material friction ring is made of carbon-ceramic composite materials, the support body is a steel support body, the weight of the composite material friction ring is reduced by more than 1/3 of the weight of the composite material friction ring compared with an all-steel brake disc, the unsprung mass of a high-speed train is reduced, the light weight trend of the high-speed train is met, and the brake disc is suitable for a motor train unit train with the speed per hour of 400 kilometers and above.

Preferably, 9 connecting pieces 3 are uniformly arranged along the circumference of the middle diameter position of the friction ring 2 of the brake disc, and the connecting piece through holes 121 on the support body 1 and the connecting piece holes 22 on the friction ring 2 made of the composite material are correspondingly arranged. 3 positioning pieces 6 are uniformly arranged along the circumferential direction of the brake disc, and positioning piece through holes 122 on the support body 1 and positioning piece holes 21 on the composite material friction ring 2 are correspondingly arranged.

However, in other embodiments, the brake disc may not include the positioning element 6, the positioning element through hole 122, and the positioning element hole 21, and the corresponding positioning function does not exist, but the normal installation, fixing, heat dissipation, heat insulation, and other performances of the brake disc are not affected, and the normal use of the brake disc is not affected.

The utility model provides a supporter both sides do not set up thermal-insulated ceramic coating for the supporter not only plays the support connection effect, can also carry out heat fast transfer to the combined material friction ring, shares the partly braking heat of combined material friction ring, and the ventilation cooling effect of make full use of self heat dissipation muscle and boss can show the temperature rise that reduces the brake disc.

As shown in fig. 10 and 11, the pressing ring 4 has a plurality of teeth 41 on the outer side thereof, and the pressing ring 4 includes an open region 10 and a blocking region 20 on the outer circumference thereof. The blocking area 20 is the area where the tooth profiles 41 are located, the open area 106 is the area between the tooth profiles 41, the open area 10 forms part of an axially through-going air duct leading to the interior of the composite material shaft-mounted brake disc, and the open area 10 occupies a length of 50-70% on the outer circumference of the pressure ring 4. Because the proportion of occupation of open area 10 is higher relatively for the air current can be comparatively smooth pass through this open area 10 business turn over in between the inside each heat dissipation muscle of brake disc, guaranteed the radiating effect of brake disc.

As shown in fig. 12, the outer side of the hub 5 has a plurality of circumferential connecting claws 51, the outer circumference of the hub 5 also includes open regions 10 and blocked regions 20, the blocked regions 20 are regions where the circumferential connecting claws 51 are located, the open regions 10 are regions between the circumferential connecting claws 51, the open regions 10 form a part of an axial through-air passage leading to the inside of the composite material shaft-mounted brake disc, and the length of the open regions 10 occupied on the outer circumference of the hub 5 is 50 to 70%. Similarly, because the proportion of the open area 10 is relatively high, the airflow can smoothly pass through the open area 10 to enter and exit between the heat dissipation ribs in the brake disc, and the heat dissipation effect of the brake disc is ensured.

As shown in fig. 13, the circumferential connecting claws 51, the tooth shapes 41 and the inner connecting claws 14 correspond one to one, and the pressing ring 4, the hub 5 and the support body 1 are detachably connected by the circumferential connecting claws 51, the tooth shapes 41 and the inner connecting claws 14.

This application has formed the three-dimensional ventilation wind channel including axial through wind channel and radial through wind channel through as above structural design. One part of the radial through air duct is formed by the heat dissipation ribs on the supporting body, and the other part of the radial through air duct is formed by the open area on the supporting body; the axial through air duct is formed by the support body, the pressure ring and the open area on the hub. The radial through air duct and the axial through air duct are communicated to form a three-dimensional heat dissipation system penetrating through the brake disc, so that the whole brake disc can be rapidly cooled.

The three-dimensional ventilation air duct in this embodiment is shown in fig. 14, and arrows in fig. 14 indicate the air flow direction of the brake disc of this application in normal use. When the air flow type brake disc is in normal use, the air flow enters the brake disc through the axial through air channel, enters the radial through air channel through the axial through air channel due to the rotation of the brake disc and other reasons, and flows out of the brake disc from the radial tail end of the radial through air channel. In the technical scheme of this application, this three-dimensional ventilation wind channel air current direction is reasonable, the air current flows smoothly, can realize the high-efficient cooling of brake disc.

In summary, from the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: 1. through set up four kinds of heat dissipation muscle and inboard connection claw that length is different on the supporter, design the profile of tooth on the clamping ring, design the hoop connection claw on the dish hub, formed by radially link up the wind channel and axially link up the three-dimensional cooling system that runs through the brake disc that the wind channel formed to realize the whole rapid cooling of brake disc. 2. The connecting piece through hole boss and the positioning piece through hole boss are designed to be part of the heat dissipation ribs, and the friction ring is connected with the support body in a middle fastening mode, so that the overall ventilation and heat dissipation performance of the brake disc is further improved. 3. Set up thermal-insulated gasket when the connecting piece is connected, hinder on heat transfer to the connecting piece, adopt lock nut simultaneously, improve product fastening connection reliability. 4. The composite material friction ring is designed into a simple ring-shaped piece, the whole structure of the brake disc is simple, the manufacturing difficulty is reduced, the friction ring is made of carbon-ceramic composite materials, the weight of the friction ring is reduced by more than 1/3 compared with that of an all-steel brake disc, the unsprung mass of a high-speed train is reduced, the light-weighted trend of the high-speed train is met, and the brake disc is suitable for the motor train unit train with the speed per hour of 400 kilometers and above.

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 (17)

1. The utility model provides a combined material axle dress brake disc suitable for track transportation vehicles, includes supporter (1) and two combined material friction ring (2), two combined material friction ring (2) install in the both sides of supporter (1), be provided with many heat dissipation muscle (11) on two sides of supporter (1), be provided with a plurality of supporter through-holes (12) on supporter (1), its characterized in that, the inside three-dimensional ventilation wind channel that has of brake disc, three-dimensional ventilation wind channel is including radially lining up the wind channel and axially lining up the wind channel, at least part supporter through-hole (12) are located the middle part of heat dissipation muscle (11), heat dissipation muscle (11) have different length, form radially lining up at least part in wind channel between the heat dissipation muscle, combined material friction ring (2) can with heat transfer extremely supporter (1), supporter (1) are through radially lining up the wind channel and dispel the heat, the inboard circumference department of supporter constitutes at least part of axially lining up the wind channel, axially link up with radially lining up the wind channel and be linked together.

2. A composite shaft-mounted brake disc according to claim 1, characterized in that the support body (1) comprises a support body (13) having an annular shape and a plurality of inner connecting claws (14) located inside the support body (13), the heat dissipating ribs (11) and the support body through holes (12) being located in the support body (13).

3. Composite material shaft-mounted brake disc according to claim 2, characterized in that the length of the heat-dissipating ribs (11) is adapted to the position of the inner connecting claws (14) on the support body (13).

4. A composite material shaft-mounted brake disc according to claim 3, characterized in that it comprises a connecting piece (3), the support body through-hole (12) comprises a connecting piece through-hole (121), and the connecting piece (3) passes through the connecting piece through-hole (121) to detachably connect the support body (1) and the composite material friction ring (2).

5. The composite material shaft-mounted brake disc as claimed in claim 4, wherein the heat dissipation ribs (11) include connecting member through-hole heat dissipation ribs (111), the connecting member through-holes (121) are located in the middle of the connecting member through-hole heat dissipation ribs (111), and connecting member through-hole bosses (1110) are formed around the connecting member through-holes (121), the connecting member through-hole bosses (1110) form a part of the connecting member through-hole heat dissipation ribs (111), and the connecting member through-hole bosses (1110) are the same height as the connecting member through-hole heat dissipation ribs (111).

6. Composite material shaft-mounted brake disc according to claim 5, characterized in that the connecting element through-hole heat-dissipating ribs (111) are radially distributed on the support body (13), the connecting element through-hole heat-dissipating ribs (111) being located at a radius between the radii of adjacent inner connecting claws (14).

7. Composite material shaft-mounted brake disc according to claim 6, characterized in that the connecting piece through-hole heat dissipating ribs (111) have the longest length of all the heat dissipating ribs (11).

8. Composite shaft-mounted brake disc according to claim 5, characterized in that the support body (13) comprises, on its inner circumference, open areas (10) and blocking areas (20), the blocking areas (20) being the areas of the inner coupling claws (14), the open areas (10) being the areas between the inner coupling claws (14), the open areas (10) forming part of the radial and axial through-air ducts opening into the interior of the composite shaft-mounted brake disc, the open areas (10) occupying a length of 50-70% on the inner circumference of the support body (13).

9. A composite material shaft-mounted brake disc according to any of claims 2-8, characterized in that it comprises a pressure ring (4) and a hub (5), the outer side of the hub (5) having a plurality of circumferential coupling claws (51), the outer side of the pressure ring (4) having a plurality of tooth profiles (41), by means of which circumferential coupling claws (51), tooth profiles (41) and inner coupling claws (14) the pressure ring (4), hub (5) and support body (1) are detachably connected.

10. A composite shaft-mounted brake disc according to claim 9, characterized in that the pressure ring (4) comprises open areas (10) and blocked areas (20) on its outer circumference, the blocked areas (20) being the areas where the tooth profiles (41) are located, the open areas (10) (6) being the areas between the tooth profiles (41), the open areas (10) forming part of an axial through-going air duct to the interior of the composite shaft-mounted brake disc, the open areas (10) occupying 50-70% of the length on the outer circumference of the pressure ring (4).

11. A composite shaft-mounted brake disc according to claim 9, characterized in that the hub (5) and the outer circumference also comprise open areas (10) and blocking areas (20), the blocking areas (20) being the areas where the circumferential coupling claws (51) are located, the open areas (10) being the areas between the circumferential coupling claws (51), the open areas (10) forming part of an axial through-air duct leading to the interior of the composite shaft-mounted brake disc, the open areas (10) occupying 50-70% of the length of the outer circumference of the hub (5).

12. A composite material shaft-mounted brake disc according to any one of claims 5 to 8, characterised in that the composite material shaft-mounted brake disc comprises a retainer (6), the support body through-hole (12) comprises a retainer through-hole (122), and the retainer (6) is arranged in the retainer through-hole (122) such that the radial positions of the support body (1) and the at least one composite material friction ring (2) are relatively fixed.

13. The composite shaft-mounted brake disc of claim 12, wherein the heat dissipating ribs (11) comprise positioning member through hole heat dissipating ribs (112), the positioning member through hole (122) is located in the middle of the positioning member through hole heat dissipating ribs (112), and a positioning member through hole boss (1120) is formed around the positioning member through hole (122), the positioning member through hole boss (1220) forms a part of the positioning member through hole heat dissipating ribs (112), and the positioning member through hole boss (1120) and the positioning member through hole heat dissipating ribs (112) have the same height.

14. The composite material shaft-mounted brake disc as claimed in claim 13, wherein the heat dissipation ribs (11) further include short heat dissipation ribs (113) and long heat dissipation ribs (114), the connecting member through hole heat dissipation ribs (111), the positioning member through hole heat dissipation ribs (112), the short heat dissipation ribs (113) and the long heat dissipation ribs (114) are all radially disposed on the support body (13), a radius where the short heat dissipation ribs (113) are disposed coincides with a radius where the inner side connecting claw (14) is disposed, the short heat dissipation ribs (113) have a shortest length among the heat dissipation ribs (11), and the long heat dissipation ribs (114) and the positioning member through hole heat dissipation ribs (112) are located between the short heat dissipation ribs (113) and the connecting member through hole heat dissipation ribs (111).

15. A composite shaft-mounted brake disc according to any one of claims 1 to 8, further comprising a heat insulating spacer (7), the heat insulating spacer (7) being arranged between the connecting piece (3) and the composite friction ring (2), the heat insulating spacer (7) hindering the transfer of heat on the composite friction ring (2) to the connecting piece (3).

16. A composite shaft-mounted brake disc according to any one of claims 1 to 8, characterised in that the connecting pieces (3) are bolts (31) and locknuts (32).

17. Composite shaft-mounted brake disc according to any one of claims 1 to 8, characterized in that said composite friction ring (2) is an annular element made of carbon ceramic and said support body (1) is a steel support body.

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