What is the vibration isolation principle of a vibration isolator: to cut off the "energy channel" for vibration propagation

Vibration is a ubiquitous physical phenomenon in mechanical systems, environmental disturbances, or human operations. Its energy propagates through solid structures or air, potentially causing imaging blurring, data deviation, and even hardware damage to precision equipment such as optical instruments and semiconductor devices. The core function of a vibration isolator is to block or attenuate the transmission of vibration energy through physical means, forming an "energy isolation zone".

For example, in microscope experiments, ground micro-vibrations may be transmitted to the lens through the experimental table, causing image jitter; while vibration isolators, through elastic support and damping energy dissipation, confine the vibration energy within the vibration isolation system, ensuring that the equipment remains stable at all times.

What is the vibration isolation principle of air floating vibration isolator: the "suspension mechanics" of air spring

The air-floating vibration isolator uses compressed air as the elastic medium and achieves vibration isolation through the deformation of the air spring. Its principle can be decomposed into three key aspects:

1. Elastic support: The ultra-thin airbag serves as the core elastic component, forming a flexible support surface under the influence of air pressure. When external vibrations are transmitted, the airbag undergoes nonlinear deformation, converting the vibrational energy into air potential energy, thus preventing it from being directly transmitted to the equipment.
2. Dynamic leveling: A high-precision pneumatic system monitors the equipment posture in real time and achieves automatic horizontal correction by adjusting the airbag pressure. For example, the pneumatic leveling module of some air-bearing vibration isolators can respond to posture changes within 0.1 seconds, ensuring that the equipment remains horizontal in a vibrating environment and avoiding additional vibration caused by tilting.
3. Damping and Energy Dissipation: The multi-pore air damping structure converts vibration energy into thermal energy through airflow friction. When the airbag compresses or expands, the air is forced to pass through tiny pores, generating viscous resistance and forming an "energy black hole". The damping design of some vibration isolators can achieve over 90% energy attenuation for low-frequency vibrations ranging from 0.5 to 5Hz, with noise levels below 18dB, meeting the requirements of nanoscale vibration control.

What is the vibration isolation principle of rubber vibration isolators: "flexible defense" in material mechanics

Solid rubber vibration isolators rely on the viscoelastic properties of rubber materials to achieve vibration isolation. Their principle involves two core mechanisms:

1、Deformation energy storage: When a composite rubber structure (such as a combination of natural rubber and synthetic rubber) undergoes elastic deformation under stress, it converts vibrational energy into the potential energy of its molecular chains. After the external force disappears, the rubber returns to its original state and releases some of the energy. However, through damping design (such as carbon black filling), the proportion of energy feedback can be controlled to avoid secondary vibration.

2、Damping dissipation: The internal friction between rubber molecular chains is the primary source of damping. Some rubber vibration isolators, by optimizing the rubber formula (e.g., with a damping ratio of 0.05-0.2), continuously convert vibration energy into heat energy during deformation.

With a design featuring a vertical natural frequency of 6.5-12Hz and a horizontal natural frequency of 3-8Hz, it can effectively isolate medium to high-frequency vibrations ranging from 10-100Hz, with a recovery time of less than 5 seconds. It is suitable for vibration-sensitive applications such as medical and biological equipment.

"Dual-mode synergy" of vibration isolation system: dynamic balance between stiffness and damping

The vibration isolation effect depends on the matching between system stiffness (elastic support capability) and damping (energy dissipation capability). Excessive stiffness can cause the vibration frequency to approach the natural frequency of the equipment, leading to resonance; insufficient damping will slow down the vibration attenuation. LeadTop's vibration isolators achieve dynamic balance through modular design:

1. The ZDT-P series of ordinary air-floating vibration isolators utilize adjustable dampers, allowing users to tailor the damping coefficient based on the load (180-800kg per unit) and vibration frequency, thereby mitigating the risk of resonance. Combining air springs, pneumatic leveling, and multi-hole damping, these isolators are ideal for low-frequency, high-precision applications such as laser processing and semiconductor inspection, achieving a vibration isolation efficiency exceeding 95%;

2. The solid rubber vibration isolator POT-P series, through the combination of a lifting adjustment base and casters, achieves a "combination of rigidity and flexibility" protective effect by absorbing vertical vibrations through rubber deformation while maintaining horizontal rigidity. The combination of rubber, lifting adjustment, and optional casters meets the medium and high-frequency vibration isolation requirements of medical microscopes, industrial inspection, etc., with a wide load range and convenient installation.

Conclusion

The essence of a vibration isolator is a "vibration energy manager". Its principle involves isolating vibrations through elastic support, dissipating energy through a damping system, and maintaining stability through dynamic leveling, ultimately achieving decoupling between the equipment and the environment.

LeadTop provides vibration isolation solutions ranging from low to high frequencies and from light to heavy loads for precision manufacturing, scientific research, and other fields, helping users overcome vibration bottlenecks and unlock higher precision technology boundaries.