Analysis of Technical Parameters of Vibration Isolators: Understanding Key Indicators and Selecting the Right Product
Introduction
When purchasing isolators, many users are confused by the numerous technical parameters. What do professional terms such as natural frequency, isolation efficiency, damping ratio, etc. represent? How to judge the performance of the isolator based on parameters? This article will delve into the core technical specifications of isolators to help you make informed purchasing decisions.
Natural frequency: the core parameter of the isolator
What is natural frequency
The natural frequency is one of the most important performance indicators of an isolator, referring to the frequency at which the isolation system vibrates freely without external force. Generally speaking, the lower the natural frequency of the isolator, the better the isolation effect. This is because the isolation system only begins to attenuate when the excitation frequency is √ 2 times higher than the natural frequency.
Comparison of natural frequencies of different products
The vertical natural frequency of LeadTop’s swing rod air floating vibration isolator ZDT-B series is 1.0-2.0Hz, and the horizontal natural frequency is optimized to 1.0-1.5Hz, belonging to ultra-low frequency isolators. The solid rubber isolator POT-P series has a vertical natural frequency of 6.5-12Hz and a horizontal natural frequency of 3-8Hz, making it suitable for mid to high frequency isolation scenarios.
Principles for selecting natural frequencies
When selecting an isolator, it should be ensured that its natural frequency is lower than one-third of the main interference frequency. For example, if the environmental vibration is mainly concentrated above 10Hz, choosing an isolator with a natural frequency of 2-3Hz can achieve good results. For ultra-high precision applications, it is recommended to choose air floating isolators with natural frequencies below 2Hz.
Vibration isolation efficiency: a direct indicator for measuring performance
Definition of isolation efficiency
The isolation efficiency refers to the percentage of the vibration attenuation ability of the isolator, and the calculation formula is: isolation efficiency=(1-transmission rate) × 100%. The lower the transmission rate, the higher the isolation efficiency. High quality isolators should achieve an isolation efficiency of over 80% within the target frequency range.
Vibration isolation performance of ZDT-B series
The ZDT-B series swing rod air floating isolator achieves a vertical isolation efficiency of 86-92% and a horizontal isolation efficiency of up to 88-94% at a frequency of 5Hz. This is due to the optimized design of its ultra-thin composite airbag and single pendulum principle structure, which can effectively isolate low-frequency vibration interference.
The practical significance of vibration isolation efficiency
The isolation efficiency directly affects the measurement accuracy of the equipment. Taking an electron microscope as an example, an isolation efficiency of 85% means that only 15% of the vibration energy is transmitted to the device, resulting in a significant improvement in imaging quality. As a supplier of vibration isolation optical platforms and accessory products, LeadTop’s vibration isolation products have undergone rigorous testing to ensure that the isolation efficiency meets the nominal value.
Damping ratio: a key factor affecting stability
The function of damping ratio
Damping ratio is another important parameter of the isolator, reflecting the system’s ability to consume vibration energy. Appropriate damping can suppress resonance peaks and accelerate system stabilization time. However, excessive damping can reduce the high-frequency isolation effect, and a balance needs to be struck between stability and isolation performance.
Damping characteristics of different isolators
The damping ratio of LeadTop’s solid rubber isolator POT-P series is 0.05-0.2, which belongs to a moderate damping level and can quickly stabilize and maintain good isolation effect. Air floating isolators typically have low damping and require external dampers to optimize dynamic response.
Optimization strategy for damping ratio
The ZDT-B series isolator adopts an external adjustable damper design, and users can adjust the damping size according to their actual needs. This flexible design enables the isolator to quickly stabilize without sacrificing high-frequency isolation performance, making it an innovative solution in engineering practice.
Load capacity and recovery time
Selection of Load Range
The load capacity of the isolator directly determines its scope of application. The load coverage of POT-P series isolators is 180-800kg/piece, which can meet the needs of most laboratory equipment. When selecting, the total weight of the equipment should be calculated and allocated according to 4 or 6 support points to ensure that each isolator operates within the optimal load range.
The Importance of Recovery Time
Recovery time refers to the time required for the isolator to return to its equilibrium position after being disturbed. The recovery time of POT-P series isolators is less than 5 seconds, which means that the equipment can quickly stabilize after collision or movement, reduce waiting time, and improve work efficiency.
Requirements for leveling accuracy
Precision isolators are typically equipped with automatic or manual leveling systems. The ZDT-B series adopts automatic leveling, with a leveling accuracy of ± 0.1mm; the POT-P series is equipped with a lifting adjustment seat, and users can manually and accurately level. The leveling accuracy directly affects the levelness and measurement consistency of the equipment.
Environmental adaptability and maintenance requirements
Consideration of work environment
When choosing an isolator, factors such as temperature, humidity, and cleanliness of the working environment should be considered. Air floating isolators require clean and dry compressed air, suitable for cleanroom environments; Rubber isolators have lower environmental requirements and a wider range of applications.
Comparison of maintenance costs
Rubber isolators require almost no maintenance and have a long service life; The air floating vibration isolator requires regular inspection of the airbag and gas supply system, which results in relatively high maintenance costs. However, in terms of long-term performance stability, the advantages of air floating isolators are more obvious.
noise control
For laboratory environments, the noise level of isolators is also an important consideration factor. The ZDT-B series adopts a silent design, combined with a low-noise air compressor, and the overall noise is controlled below 50dB, which will not interfere with normal operation.
Conclusion
Understanding the technical parameters of the isolator is a prerequisite for selecting the right product. The natural frequency determines the lower limit of isolation, isolation efficiency reflects performance, damping ratio affects stability, and load capacity determines the applicable range. By comprehensively analyzing these indicators and combining them with specific application scenarios, users can choose the most suitable isolator.