Dual-layer vibration-damping fastener for city railway

Abstract

The invention discloses a dual-layer vibration-damping fastener for a city railway. The dual-layer vibration-damping fastener comprises a base, an insulation buffer cushion plate, an elastic cushion layer, an upper-layer iron cushion plate, an insulation gauge block, a steel rail, an under-rail rubber cushion plate, a nut, a flat washer, T-shaped bolts, an elastic strip, anchor bolts, heavy spring washers, pressing plates, an insulation press cover, an iron connecting rod, and a nylon sleeve pipe. The dual-layer vibration-damping fastener disclosed by the invention has the beneficial effects that a creative designed structure without a lower-layer iron cushion plate is adopted, a special tool is not needed, and the dual-layer vibration-damping fastener can be manually disassembled; the elastic cushion layer is simple to repair and replace, and the conservation and the repair are facilitated; the iron connecting rod is used, so that the two anchor bolts are stressed at the same time, the operating state of the anchor bolts is optimized, the safety of the fasteners is improved, besides, the structure is simple, and the cost is low.

Description

technical field [0001] The invention relates to a double-layer vibration-damping fastener, in particular to a double-layer vibration-damping fastener for urban railways. Background technique [0002] Urban railways refer to railways connecting two cities, generally in a certain area, such as the Pearl River Delta, the Yangtze River Delta, and the Bohai Rim. The overall requirements of the line are between the subway and the high-speed railway, and the maximum operating speed is required to be 120km / h~140km / h. The high-speed rail EMU trains are used, and the high-speed railway standard design is used. In the section of the line that requires vibration reduction, it is required to lay fasteners with vibration and noise reduction effects. The vibration and noise reduction effect of the fasteners is required to be 3-5dB compared with the section of high-speed railway fasteners. The application of vibration and noise reduction fasteners under such high speed and large axle load ...

AI Technical Summary

Problems solved by technology

The main disadvantage of the overall vulcanized shear type damping fastener is that the stiffness cannot be adjusted, and the vulcanized rubber layer is easy to peel off. Once the vulcanized rubber layer is damaged, the entire fastener needs to be replaced, and the maintenance cost is high.

The main disadvantage of the double-layer compression damping fastener is that it adopts a double-layer iron backing structure, which is expensive to use, and an independent locking structure is required between the two iron backing plates, which is not easy to disassemble, and it is difficult to maintain and replace the vibration-damping backing.

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