How to reduce vibrations in machines?

Article by: Ignacio MascareƱas | Last update: April 10, 2022
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Some of the tips to avoid these vibrations are:

Maximize gear stiffness. Reduce transmission error. Use of helical gears, since they guarantee greater contact between wheels and reduce the noise generated. Use materials with internal damping.

How to dampen vibrations?

Source isolation (active): With an elastic intermediate layer, highly dynamic forces from a machine can be damped. This reduces vibrations and isolates the vibration source from its surroundings, for example in presses or compressors.

How is vibration controlled?

To reduce exposure to vibrations, measures can be taken that tend to reduce the magnitude of the acceleration transmitted, either to the hand or to the whole body, or to reduce the time of exposure to them.

What devices can be implemented in machinery and equipment to reduce vibrations?

Anti-vibration mounts for machines

    Plastic insulators are low cost and have exceptional uniformity. The most commonly used are polyethylene and styrene materials. … Metal springs. They are normally used in applications that require large static deflections.

What material absorbs vibrations better?

Lead is the best acoustic insulator of all as it insulates from sound and vibrations. However, its use is currently prohibited, so other alternative materials are used, such as heavy and flexible sheets made from rubber, bitumen, asphalt, EPDM, etc.

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What is the best material to absorb sound?

Acoustic absorbers are usually low-density materials (they are light) and highly flexible. For example, mineral fibers (fiberglass, rock wool), acoustic foams (polyurethane, melamine) and textiles (polyester, cotton), are part of the most common acoustic absorbers.

What is the best material to transmit sound?

The speed with which the sound wave propagates varies from one medium to another. It travels faster if the sound is produced in a solid material than in a liquid, and more slowly in a gaseous medium.

What is vibration isolation?

In general, the objective of the vibration isolator is to reduce the forces and displacements transmitted from a source to the receiver, usually with an elastic isolator that is idealized as the combination of a linear elastic element and a viscous damping element.

What is the difference between a vibration isolator and a vibration absorber?

Another option to protect a component from harmonic vibrations at a constant frequency is a dynamic vibration absorber. Unlike the isolator in the previous section, a dynamic absorber consists of a second mass$spring system that is added to the main component to prevent it from vibrating.

What is an Antivibration?

Anti-vibration systems are designed so that the dynamic components of large industrial machines that inevitably produce noise and vibration, because they are often mechanically fixed to the load-bearing structure, high levels of noise and structural vibration are likely to occur.

What are the types of vibration?

Types of vibrations

Free mechanical vibration without damping. If we apply Newton’s second law to the block-spring system of Hooke’s law, we are left with: … Free mechanical vibrations with damping. … Forced mechanical vibrations without damping. … Forced mechanical vibrations with damping.

What is vibration in SST?

Vibrations are understood as any oscillating movement that a particle makes around a fixed point. This movement can be regular or random in direction, frequency and/or intensity. Random vibrations are more common.

What are the risks of vibrations?

HEALTH EFFECTS

Whole body vibrations can produce respiratory, musculoskeletal, sensory, cardiovascular disorders, effects on the nervous system, on the circulatory system or on the digestive system.

How to remove low frequency sounds?

How to avoid night noises

Modify your bedroom. …Install acoustic tile. … Soundproof your windows. … Insulate the ground. … Move the location of your room. … Wear earplugs. …Cover the noise with white noise. … Invest in high-tech noise suppression products.

How to isolate the sound of a room?

Use insulating paint to isolate noise from home. Soundproof the house with shelves full of books. Soundproof with carpets, curtains and tapestries. Double glazing to prevent noise from outside. Insulate the wall with wool, cork or wood fibre.

How to control impact noise?

Use enclosure techniques around the sound source or the receiver itself. Use acoustic absorbers that can be placed on ceilings, floors and walls to attenuate sound. Place filters and acoustic silencers.

What is a linear vibration?

Linear vibration: if the basic components of a system behave linearly, the resulting vibration is linear. Non-linear vibration: occurs if any of its components behaves as non-linear.

What effect does reducing mass have on the frequency of a system?

From that it can be seen that if the stiffness increases, the natural frequency will also increase, and if the mass increases, the natural frequency decreases. If the system has absorption, which all physical systems do, its natural frequency is a bit lower and depends on the amount of absorption.

What materials absorb sound?

The most common porous materials are mineral wool (rock and glass). The absorption mechanism of these materials is to transform sound energy into heat energy. Absorbers in the form of a panel or membrane: they absorb low frequencies (bass) more effectively than high frequencies.

How does sound travel faster?

The speed of sound depends on the type of material through which it travels. When sound travels in solids it has a higher speed than in liquids, and in liquids it is faster than in gases.

How can sound be transmitted?

Sound travels through a medium, which can be solid, liquid, or gas. This medium must always be mechanical, this transmission through a vacuum will never take place. The forms of the aforementioned waves are those that mark the type of sound, either more serious or more acute, more or less intense, etc.

What is vibration in industry?

This is a vibration that can cause dizziness and vomiting. They affect the central nervous system. They are related to the use of machinery dedicated to industrial activities such as driving excavators, rollers, tractors, driving some trucks and forklifts…

How is vibration measured at work?

The instrument used to measure vibrations is called a vibrometer. The vibrometer that, by selecting the frequency with a filter, converts the acceleration of a vibration into an electrical signal that, by means of an indicator, determines the value in the pertinent units of said acceleration.

How does vibration affect workers?

This type of mechanical vibration poses risks to the health and safety of workers, in particular: vascular, bone or joint, nerve or muscle problems. Main effects: – Vascular disorders. – Bone and joint disorders. – Neurological disorders.

What is a vibration and examples?

Whole-body vibrations occur when the body is supported by a vibrating surface (for example, when sitting on a vibrating seat, standing on a vibrating floor, or lying on a vibrating surface).

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