Elastomer material, composite damping base plate thereof and preparation method of base plate

Abstract

The invention relates to the technical field of vibration reduction, in particular to an elastomer material, a composite vibration reduction base plate of the elastomer material and a preparation method of the base plate. The elastomer material comprises two materials, an active agent hydroxyl-terminated polybutadiene is added into a damping rubber component, and double bonds of the active agent hydroxyl-terminated polybutadiene can participate in vulcanization reaction of rubber; the terminal hydroxyl group can participate in the cross-linking reaction of the polyurethane elastomer, so that chemical interface bonding is formed between the two elastomers, and the use stability of the prepared periodic composite base plate is kept; according to the preparation scheme of the composite vibration reduction base plate, the inelastic layer and the elastomer are compounded through a secondary rotary mold vulcanization process, and the prepared composite vibration reduction base plate is stable in structure and good in vibration reduction performance; the composite vibration reduction base plate is of the multi-layer periodic structure formed by compounding the elastic layer and the non-elastic layer, and the high vibration reduction characteristic of low height is achieved through the vibration reduction characteristic of the periodic structure by means of the composite vibration reduction base plate with the periodic structure.

Description

technical field [0001] The invention relates to the technical field of vibration reduction, in particular to an elastomer material and its composite vibration-damping backing plate and a preparation method for the backing plate. Background technique [0002] The environmental problem caused by wheel-rail vibration is one of the main problems affecting the development of urban rail transit. Rail dampers, that is, vibration-absorbing fasteners, are one of the main vibration-reducing measures used in the current rail system. Compared with the ballast bed vibration reduction and sleeper vibration reduction measures that need to be placed inside the concrete foundation, the fastener vibration reduction measures have obvious advantages in terms of construction cost, construction convenience, replacement and maintenance. Although the common damping fasteners and medium damping fasteners commonly used at present are widely used and have various structures, they cannot meet the requi...

AI Technical Summary

Problems solved by technology

Although the common damping fasteners and medium damping fasteners commonly used at present are widely used and have various structures, they cannot meet the requirements of high vibration reduction; while rail suspension support fasteners can achieve high vibration reduction, but due to low market acceptance , the application is obviously restricted, so that high-level or special vibration-damping road sections have to adopt ballast bed vibration-damping pads, steel spring floating plates and other vibration-damping methods with high cost, long construction period, and difficult maintenance and replacement, causing a lot of inconvenience

[0003] In the prior art, the vibration-damping pads used for wheel rails are often made of only one kind of elastomer material, for example, the entire vibration-damping pads are formed by a single rubber, because it is a single material , the elastic properties produced by it are limited. Compared with hybrid materials, the use of elastic properties will be subject to some limitations, such as poor aging resistance, poor mechanical properties, and poor stability, which is difficult to meet long-term use. , will cause frequent replacement and increase the cost of use

In addition, for the preparation process, it is often simply molded directly by one-time molding, the overall structure is an integrated structure, and the vibration damping performance is limited. In the actual use process, it is found that the vibration damping effect cannot meet the application requirements of rail vibration damping

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