High-speed train shaft-mounted brake disc

Abstract

The invention belongs to the technical field of train brake devices, and particularly relates to a high-speed train shaft-mounted brake disc which comprises a disc body, a disc hub, a pressing ring and a fastening piece. The disc body is the integral type welding disc body with radiating ribs; the disc hub is provided with nine disc hub flange teeth distributed in an equal circumference way and provided with bolt holes in the middles; three tooth grooves distributed in an equal circumference way are arranged on the surface matched with the pressing ring; and nine bolt holes distributed in an equal circumference way and three pressing ring flange teeth adaptive to the tooth grooves distributed in an equal circumference way are arranged on the pressing ring. According to the high-speed trainshaft-mounted brake disc provided by the invention, a processing method of an original high-speed train shaft-mounted brake disc body is changed, and a forging and welding method replaces an existingcasting method, so that the yield of products is improved, the production cost of the products is reduced, and the delivery period of the products is shortened; and meanwhile, the structures of an original shaft-mounted brake disc hub and an original pressing ring are further improved, all degrees of freedom of the pressing ring except for the longitudinal direction are restrained, and the bending moment stressed on bolts is reduced, so that the service life of the brake disc is effectively prolonged, and the core competitiveness of the products is improved.

Description

technical field [0001] The invention belongs to the technical field of train braking devices, and in particular relates to a high-speed train axle-mounted brake disc. Background technique [0002] At present, domestic CRH series EMUs and "Fuxing" EMUs all adopt disc brakes, and all trailers are equipped with high-speed train shaft-mounted brake discs. The existing EMU axle-mounted brake disc is mainly composed of a disc body, a disc hub, a pressure ring and fasteners. [0003] The disc body is an integral cast steel structure with heat dissipation ribs, which is composed of two friction rings, multiple heat dissipation ribs and 9 flange teeth distributed on equal circumferences: the friction ring is a solid ring with a certain thickness, which acts as a brake Plate friction braking and absorbing the heat generated by friction; the heat dissipation rib is an entity approximately cylindrical or elliptical, which is distributed between the two friction rings according to certa...

AI Technical Summary

Problems solved by technology

[0005] At present, the level of overall casting technology in China is not high, and the disc body has very strict requirements on the control of casting defects, resulting in a low yield and unstable quality of domestic cast disc bodies, and it is difficult to ensure large-scale loading and use of brake discs. Therefore, domestic The casting blanks of EMU brake discs rely on imports. The cost of imported disc casting blanks is high and the delivery cycle is long, which is not conducive to reducing the cost of EMUs and improving the core competitiveness of EMU products.

[0006] In addition, on the Lanxin Line, where the line conditions are relatively harsh, the bolts of the shaft-mounted brake discs of the EMUs have been broken or lost many times.

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