Vibration Isolators - Vibration Isolation and Transmissibility - Dynamics of Machinery

TL;DR

Vibration isolators are used to control mechanical vibrations and reduce noise and damage to machines by isolating them from supporting structures.

Transcript

hello everyone in this video we'll discuss about vibration isolators mechanical vibrations can be produced because of various factors such as imbalances misalignment loosenesses or wear and various other factors can contribute to mechanical vibrations now whenever there are high levels of vibrations they create noise and they can also lead to the f... Read More

Key Insights

• 😩 Mechanical vibrations can be caused by imbalances, misalignment, looseness, or wear in machines.
• 🥺 Vibrations can create noise and may lead to machine failure, making control necessary.
• 🎮 Controlling vibrations can be done at the source, on the path, or on the receiver.
• 📳 Vibration isolators are used to isolate machines from supporting structures, reducing the transmission of vibrations.
• 🌸 Isolators consist of a helical spring for stiffness and an elastomeric layer for damping.
• 📌 Considerations for selecting vibration isolators include location, sizing, location of isolators, adjustment, eliminating bypasses, and fail-safe operation.
• 📳 Vibration isolators protect sensitive items and can be used in various machinery applications.

Questions & Answers

Q: How can mechanical vibrations be controlled at the source?

Vibration at the source can be controlled by fixing imbalances, misalignments, or any other factors causing vibrations. Relocating or replacing the machine can also help reduce vibrations.

Q: How can vibrations be controlled on the path?

Vibrations on the path can be controlled using vibration isolators, such as isolated springs or inertia blocks. These elements help to make the machine's natural frequency lower than the excitation frequency, reducing vibrations.

Q: How can the natural frequency of the system be changed to control vibrations on the receiver?

The natural frequency of the system can be changed by adding mass or changing the stiffness of the system. Increasing the mass or changing the stiffness will result in a lower natural frequency, reducing vibrations on the receiver.

Q: What are the considerations for selecting a vibration isolator system?

Considerations include the location of the machine, proper sizing of isolators, location of isolators, proper adjustment of springs, eliminating any connection that bypasses the isolator, and ensuring fail-safe operation.

Summary & Key Takeaways

• Mechanical vibrations can lead to noise and machine failure, making it necessary to control them.

• Vibrations can be controlled at the source by fixing imbalances and misalignment, on the path through the use of isolated springs or inertia blocks, or on the receiver by changing the natural frequency of the system.

• Vibration isolators are used to isolate machines from supporting structures, reducing the transmission of vibrations and improving operating conditions.