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A shaft-mounted brake disc made of aluminum matrix composite material

A technology of aluminum-based composite materials and brake discs, which is applied in the direction of brake discs, brake types, and parts of brakes, can solve problems such as thermal stress cracking, low strength of aluminum-based composite materials, and poor plasticity and toughness. Bolt pre-tightening force, brake service life and safety improvement, and the effect of reducing stress concentration

Active Publication Date: 2020-01-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: due to the low strength and poor plasticity and toughness of the aluminum matrix composite material, the problems of thermal stress cracking and single friction torque braking of the aluminum matrix composite brake disc during service

Method used

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  • A shaft-mounted brake disc made of aluminum matrix composite material
  • A shaft-mounted brake disc made of aluminum matrix composite material
  • A shaft-mounted brake disc made of aluminum matrix composite material

Examples

Experimental program
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Embodiment 1

[0020] An aluminum matrix composite shaft mounted brake disc, see figure 1 . The brake disc includes: a disc body 1 , a pressure ring 2 , a disc hub 3 , positioning pins 4 , and a bolt fastening system 5 .

[0021] The disc body 1 has double-layer, ring-shaped flanges, namely flange I6 and flange II7. The ribs are connected, and the heat dissipation ribs are distributed in a regular hexagon. Through holes 9 are opened on flange I 6, flange II 7, connecting column I11 and connecting column II 12, and pin grooves 8 and pin grooves are evenly distributed on flange I 6. The number of 8 is 3, the number of through holes 9 is 12, the thickness of the friction ring 10 of the disc body 1 becomes variable, the larger the radius of the position, the smaller the thickness, see figure 2 and image 3 .

[0022] The disc hub 3 adopts a ring-shaped flange, and 12 mounting holes are evenly distributed on the flange, and counterbores 13 are provided on 3 of the mounting holes, which are u...

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Abstract

The invention discloses an aluminum matrix composite shaft brake disk. The brake disk comprises a disk body (1), a clamping ring (2), a disk hub (3), a positioning pin (4) and a bolt fastening system(5); a flange I (6) and a flange II (7) are located at the inner ring of the disk body (1), integrally connected with a friction ring (10) of the disk body along the radial direction, and integrally connected along the axial direction through connection columns I (11) and connection columns II (12); through holes (9) are formed in the flange I (6), the flange II (7), the connection columns I (11)and the connection columns II (12); key seats (8) are uniformly distributed on the flange I (6); counter bores (13) are uniformly formed in the disk hub (3); the disk body (1) and the disk hub (3) realize circumferential positioning and transfer a part of torque through the positioning pin (4); and the disk body (1), the disk hub (4) and the clamping ring (2) realize axial positioning through thebolt fastening system (5). The aluminum matrix composite shaft brake disk is capable of solving the problems that roots of connection flanges of existing aluminum alloy brake disks crack due to stressconcentration and brake is realized through single friction torque.

Description

technical field [0001] The invention relates to an aluminum-based composite shaft-mounted brake disc for rail vehicles. The body of the brake disc is formed by casting and is suitable for urban rail trains. [0002] technical background [0003] China is rapidly building subways, urban railways and high-speed railways on a large scale. The running speed of urban rail trains is constantly increasing, and urban rail vehicles with a speed of more than 100km / h have already been put into operation. [0004] With the increase of the running speed of urban rail trains, the kinetic energy of the trains has increased significantly. The original tread braking will cause the temperature rise of the wheels to be too high, which will affect the service life of the wheels. Therefore, urban rail trains above 80km / h will adopt the disc system move. [0005] The brake disc materials that have been developed at home and abroad mainly include: iron series, steel series, aluminum-based composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/12F16D65/84
CPCF16D65/12F16D65/84
Inventor 杨智勇韩建民李卫京李志强刘小龙韩超陈怀军
Owner BEIJING JIAOTONG UNIV
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