The brake beam in the vehicle is assembled from a composite brake splint and a welding brake beam that are aligned with the wheel. In designing, the structural strength of the brake beam and the friction performance of the composite brake splint material need to be considered. At present, nearly ten thousand units of speed reducers installed and used in China are all made of brake rails that are machined into ordinary rails.
In order to adapt the newly designed brake beam to the existing reducer, the following design principles should be met when designing the brake beam: 1. Seamlessly connect with existing reducer devices of various types. 2. Meet the requirements of structural strength and connection strength of the reducer. 3. Easy installation, replacement and maintenance of composite brake splints.
Composite materials should have anti-overspeed and noise reduction characteristics, but the use of composite materials also has certain limitations. When used as a speed reducer splint material, some wheels have a flash on the outer surface of the tread, which is very sharp and severely shears the composite material, resulting in a short service life of the splint and is not suitable for direct use. In comparison, metal materials have high hardness and good shear resistance, and they can also significantly improve the anti-noise performance of the retarder by adjusting the composition, structure, and structure of the metal material.
Therefore, after a large number of tests, it was found necessary to combine the advantages of the two, using a metal material as a substrate, a composite material as a filler, and forming an integral composite brake splint that has both shear resistance and wear resistance as well as a function of adjusting the friction coefficient. structure. In this kind of structure, the composite material no longer bears, but mainly acts to adjust the friction coefficient.
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