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Classification of vibration damping rubber products, static stiffness and dynamic stiffness
2023-12-12

Rubber shock absorbing products are generally also known as rubber shock absorbers. There are many types of rubber shock absorbers, which can be divided into compression type, shear type, torsion vibration type, impact type and hybrid type from the point of view of its vibration power. With the development of science and technology, the types of rubber shock absorbers are more and more, the use is also more and more extensive, the following from the application areas of rubber shock absorbers on its development and application prospects are outlined.

1、Rubber shock absorbers for railroad locomotives and railroad track pads
According to statistics, domestic railroads and locomotives use a variety of rubber materials and components about more than 10,000 kinds of rubber consumption of about 10 kt / a. Used in locomotives on the rubber shock absorber, its main role is to withstand compression stress, shear stress and torsion moment, as well as at the same time to withstand 2 or more than 2 kinds of stress composite effect.

2、Rubber shock absorbers for construction
Due to unavoidable natural disasters such as earthquakes, the construction of buildings and structures resistant to strong earthquakes is an important issue in the field of construction engineering. At the same time, the increasing density of traffic leads to greater vibration transmission and noise pollution, civil engineering construction of vibration and noise isolation has also become an urgent problem.

3、Rubber shock absorber for automobile
With the development of social and economic, domestic and foreign automobile modification and replacement is quite frequent, the automobile industry is facing a period of rapid change, the development is characterized by driving safety, ride comfort, driving high speed and luxury under the premise of further improving the service life of the car. Automotive vibration damping rubber products, including engine mounts, suspension components, rubber springs, rubber air springs and collision rubber protection parts. In recent years, in order to improve the safety, comfort and operability of the car, automotive vibration damping rubber products and the number of varieties continue to increase, such as a sedan on the number of vibration damping rubber products has reached 50-60 pieces.

4、Rubber shock absorbers for bridges
In the bridge project, beam bridge span ends need to set up the bearing. The main role of the bearing is to bridge span structure on all the load (including constant load and live load) reliably transferred to the abutment, and bear the bridge span structure due to the load effect occurs at the end of the horizontal dislocation, corner and other deformations; followed by adapt to the expansion and contraction due to changes in temperature and humidity.

Shock absorption products:
Specialized for damping cushioning rubber products. General use of natural rubber and chloroprene rubber, oil resistance requirements using nitrile rubber, high and low temperature resistance requirements using silicone rubber, high damping requirements using butyl rubber. Rubber shock absorption products manufacturing process, in addition to rubber air springs similar to tires, most of the model products similar. Usually made of support or connectors, widely used in various vehicles, ships, machinery, instruments, bridges, buildings, to eliminate or slow down the adverse consequences of vibration.

About the two indicators of vibration-damping products
1. Static stiffness: refers to the vibration-damping rubber in a certain displacement range, the pressure (or tensile force) changes and its displacement changes in the ratio. Determination of static stiffness must be measured in a certain displacement range, different displacement range of static stiffness value is different, but some customers require the entire displacement range measured by the change curve.
2. dynamic stiffness: refers to the vibration damping rubber in a certain displacement range, a certain frequency, the pressure (or tensile force) changes and its displacement changes in the ratio. The determination of dynamic stiffness must be in a certain displacement range, a certain frequency determination, different displacement range of different frequency determination of dynamic stiffness value is different.

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