Carbon-ceramic axle-mounted brake disc suitable for high speed trains

Abstract

The invention discloses a carbon-ceramic axle-mounted brake disc suitable for high speed trains. The carbon-ceramic axle-mounted brake disc comprises a disc hub (1). The disc hub (1) is externally andfixedly sleeved with an isolation supporting body (2), a first carbon-ceramic friction body (3), a second carbon-ceramic friction body (4) and a compression ring (5). The isolation supporting body (2), the first carbon-ceramic friction body (3), the second carbon-ceramic friction body (4) and the compression ring (5) are all in a circular ring shape. The first carbon-ceramic friction body (3), the isolation supporting body (2) and the second carbon-ceramic friction body (4) are sequentially laminated in the axis direction of the disc hub (1). The compression ring (5) is arranged inside the first carbon-ceramic friction body (3) in a sleeved mode. The compression ring (5) and the isolation supporting body (2) are arranged in a laminated mode. According to the carbon-ceramic axle-mounted brake disc suitable for the high speed trains, a thermal insulation combined-type structure is adopted, the service life of the brake disc can be greatly prolonged, and long-term reliability of locomotive running is guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a carbon ceramic axle-mounted brake disc suitable for high-speed EMUs. Background technique [0002] Braking system is one of the key technologies of rolling stock, which is directly related to the safety of train operation. At present, the research and application of disc brakes in my country have made great progress, and all high-speed EMUs are equipped with disc brakes. The most critical device for braking is the brake disc. According to the installation method, the brake discs for high-speed EMUs are generally divided into axle-mounted brake discs and wheel-mounted brake discs. The loads received during the braking process include: self-weight, braking torque, thermal load and vibration impact load and other complex working conditions, such as strong friction, high thermal load, large braking force and centrifugal force, etc., the reliability of the brake disc work ...

AI Technical Summary

Problems solved by technology

First of all, because the carbon ceramic material is brittle and has low strength, if the full carbon ceramic shaft-mounted brake disc structure is applied to the high-speed EMU, it is difficult to withstand high braking pressure and braking torque; if the fastening bolts are placed on the braking The ring center of the disc has the highest temperature during the braking process. High temperature will cause the bolts to expand, and then the axial force will decrease, which will make the brake disc useless or the bolts will be fatigued and fractured, which will affect driving safety.

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