Rubber cushioning pads play an important role in various equipment, especially in the damping and noise suppression of mechanical equipment. The choice of the thickness of the rubber cushion directly affects its damping effect and service life, so the thickness selection is very important in the design and production of the cushion. This paper will discuss in detail the selection criteria of the thickness of the rubber cushioning pad.
First, rubber cushion materials and properties
First of all, the rubber shock cushion should be selected with high elasticity, compression deformation resistance, oil resistance, corrosion resistance and other characteristics of the material. Commonly used rubber materials are natural rubber (NR), styrene butadiene rubber (SBR), neoprene rubber (CR) and so on. Different rubber materials have different characteristics, such as natural rubber has excellent resilience, styrene butadiene rubber has good wear resistance, neoprene rubber has excellent oil resistance and so on. Therefore, when choosing rubber materials, the choice should be made according to the use environment and shock absorption requirements of the equipment.
Second, the influencing factors of the thickness selection of rubber shock cushion
1. Equipment weight and load
The thickness of rubber cushioning pad directly affects its bearing capacity. Generally speaking, the greater the thickness of the shock pad, the stronger its carrying capacity and the greater the weight of the equipment. Therefore, when selecting the thickness of the shock pad, the weight of the equipment and the static and dynamic load that the shock pad needs to bear should be considered.
2. Vibration frequency and amplitude of equipment
The vibration frequency and amplitude of the equipment is another important factor in choosing the thickness of the rubber cushion. For equipment with high frequency vibration, a thin cushioning pad should be selected to avoid resonance caused by excessive stiffness; For equipment with low frequency vibration and large amplitude, thicker shock absorbing pads should be selected to provide better vibration isolation.
3. Use environment and temperature
The use environment and temperature of the rubber cushion have a great impact on its performance. Under high temperature environment, the rubber material with good high temperature resistance should be selected, and the thickness of the shock absorber should be increased to enhance the pressure resistance. For low temperature environments, rubber materials with low glass transition temperature should be selected, and the thickness of the shock cushion should be appropriately reduced to avoid stuck when the equipment is started.
Standard and calculation method of thickness selection of rubber shock cushion
After comprehensively considering the above influencing factors, the thickness selection of the rubber shock pad can be calculated by the following steps:
1. According to the weight and bearing capacity of the equipment, determine the basic thickness of the shock pad. Generally, the greater the weight of the equipment, the greater the thickness of the required shock pad.
2. According to the vibration frequency and amplitude of the equipment, select the appropriate stiffness of the damping pad. The stiffness can be achieved by adjusting the thickness, density and elastic modulus of the cushioning pad. For high frequency vibration equipment, a small stiffness should be selected; For low-frequency vibration equipment, a larger stiffness should be selected.
3. According to the use of the environment and temperature requirements, choose the appropriate rubber material. For high temperature environment, the thickness of shock pad can be appropriately increased to enhance the pressure resistance; For low temperature environments, rubber materials with low glass transition temperature can be selected and the thickness can be appropriately reduced to avoid stuck when the equipment is started.
4. According to the calculated thickness and selected material, sample trial production and performance test are carried out. By testing the vibration, noise level, bearing capacity and other indicators of the equipment, the performance of the cushion is evaluated and the necessary adjustment is made.
5. After sample trial production and performance testing, the thickness and material formula of the cushion are finally determined. According to the actual needs of production, mass production or customized production.
In short, the selection standard for the thickness of the equipment rubber shock pad is a comprehensive process, which needs to take into account the weight of the equipment, vibration, use environment and temperature and other factors. Through scientific and reasonable calculation and testing, it can ensure that the rubber shock absorber has excellent performance and long service life, and provides a reliable shock absorber solution for various equipment.