Shear-press composite type elastic wheel for low-floor tramcar and production process thereof

Abstract

The invention provides a shear-press composite type elastic wheel for a low-floor tramcar and a production process thereof. The shear-press composite type elastic wheel for the low-floor tramcar comprises a wheel band, a press ring and a wheel core; the wheel band, the press ring and the wheel core are all made of high-purity iron alloy; the mass percentage of each component of the high-purity iron alloy is as follows: 0.015-0.5% of Si, 0.6-0.9% of Mn, 0.65-0.7% of C, 1.8-2.1% of Mg, 3.45-4.21% of Al, 0.005-0.04% of S, less than or equal to 0.3% of Cr, less than or equal to 0.30% of Cu, less than or equal to 0.25% of Ni, less than or equal to 0.04% of P, less than or equal to 0.08% of Mo, less than or equal to 0.05% of V, less than or equal to 0.02% of Sc, less than or equal to 0.03% of Tiand the balance of Fe. According to the shear-press composite type elastic wheel for the low-floor tramcar, by using a mode of adding a rare earth element and refining the rare earth element in steps, the tensile strength of the wheel band, the press ring and the wheel core is enhanced, the center of a material is close without a gap, and moreover, no metallic contamination is caused, and the strength uniformity of the surface is high; a rubber layer is embedded between the wheel band and the wheel core and has a vibration absorbing effect; the rubber layer possesses good radial stiffness andaxial stiffness; and meanwhile, the freedom of a wheel rim is limited; the problem that a tuned mass damper is additionally mounted on the external side of the wheel to suppress medium and low noisesis solved; the structure is simple; and the vibration absorbing and noise reduction effect is good.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a shear-compression composite elastic wheel for low-floor trams and a production process thereof. Background technique [0002] Subway has become an increasingly important means of transportation in large cities in my country. However, the vibration noise generated during the operation of the subway will not only affect the comfort of the passengers in the car, but also cause noise pollution, directly affecting the work and rest of the residents along the city, and the elastic wheel is an effective way to reduce the vibration noise of the subway wheel rail Way. [0003] For ordinary integral rolled steel standard wheels, the wheel rolling radiation noise is above 2000Hz. This is because the rolling force of the wheel and rail excites the radial modal vibration and radial coupling modal vibration of the wheel near and above 2000 Hz, which in turn causes the vibration r...

AI Technical Summary

Problems solved by technology

However, since the rubber layer of the elastic wheel decouples the rim and the web, the rim becomes free and increases the modal density of the rim, so the resonance mode of the rim is more easily excited, resulting in an increase in the sound radiation of the rim

[0004] At present, the elastic wheels used in rail transit have limited noise reduction effect on low- and medium-frequency radiation noise, and sometimes even increase the low- and medium-frequency radiation noise. It is often necessary to install a tuned mass damper on the outside of the wheel to suppress low and medium noise, resulting in elastic wheels. Complex structure and increased application cost

Images