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As the name implies, it is a device that prevents one object from affecting another. It allows both objects to exist in their natural state without influence from the other. With an isolator, one of the objects is allowed to vibrate without transmitting all of the energy of that vibration to the other object.
For many years, Firestone has been in the business of designing and developing a wide range of mounts and supports to isolate vibrations that are detrimental to many industrial and manufacturing environments. The range of isolators offered by Firestone has been redefined to include two major lines of isolators - Firestone Airmount isolators and Firestone Marsh Mellow springs. Each have their distinct benefits over other typical industrial vibration isolators, and each has advantages over the other. Many industrial vibration isolation problems can be solved using either line, and a complete analysis of potential solutions to these problems should include investigating options using both lines of isolators.
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Pumps may rotate or reciprocate. Rotating pumps are usually well balanced. Nevertheless their elastic support makes sense when these pumps are installed on the upper floor levels inside a building, since in this way vibration and structure borne noise can be avoided.
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Precision machine tools like Roll Grinders, Machining Centres, 3-D Measuring Machines, Microscopes or Test Equipment, located typically in the middle of a plant, are often sensitive to vibrations, excited somewhere in the surroundings.
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The Air Spring Insulator BiAir consists of a cast steel or aluminum housing, within which the air space is contained by thin-walled flexible and pressure-resistant rolling membrane. A piston sits on top of the membrane and is pressed into the air space. This design allows a highly-effective isolation of vibration. In order to simultaneously achieve a high degree of damping, the air space is divided into two chambers connected with an air tube. (load/damping volume) A choke valve can be used to adjust from outside the cross-section of air flowing into the connecting tube from outside according to the degree of damping required. The friction on the flow of air caused by the choke valve can create a damping effect of up to 20%. Damage to the rolling membrane caused by overpressure is prevented by additional safety valves. Air springs are available for greater maximal loads and lower natural frequency. Level control provides an important contribution toward the optimal function of an air spring system. If a change in load likely occurs on equipment mounted with an air spring system, such that compression of one of the springs or an inclination of the equipment will result, a leveling system might be the only solution available. The change in air pressure in the air spring insulators adjusts the height of the individual elements (BiAir or FAEBI). By quickly pressurizing or de-pressurizing the springs, the proper level can be maintained despite variations in the position of the load.
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Shock absorbers elastomers with the multidirectional characteristics for the insulation of the shocks and the vibrations.
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2 ranges of shock absorbers for heavy machines:
Hybrid shock absorbers made up of helical springs combined with a viscous damping. Recommended for the important loads and the requests low frequency.
Applications:
Insulation of rotary machines of average and great importance, with a rotation higher than 400 rpm and comprising great dynamic stresses (unbalances, blockings, eccentricities). Generators example, pumps, centrifugal machines and compressors. Insulation of presses of average and great importance with rates higher than 150 blows per minutes.
Entirely metal shock absorbers made up of helical springs and internal cushions in stainless steel wire. Recommended for the important loads and the requests low frequency.
Applications:
Insulation of rotary machines or shocks, with or without basic use d´inertie: ventilators, compressors, generator groups, hammer of forging mill, presses eccentric, insulation passivates large equipment.
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Entirely metal shock absorbers with multidirectional characteristics for the insulation of the shocks and the vibrations.
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- Isolation active and passive
- Isolation equivalent frequency
- Isolation low frequency
- Automatic correction of the level of precision 100 µ m
- Unparalleled Performance
- Small
- Acoustic Performance
- Can operate without air (SLM)
- Excellent stability
- Range includes: materials, mechanical control system with a system with electronic control, tables and work plans.
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MaxDamp®, a highly damped version of our Gimbal Piston™ Air Isolator. MaxDamp® is ideal for OEM equipment with motorized X-Y stages or robots which require high performance vibration isolation and aggressive settling time for stage induced motion of the isolated payload..
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Air spring type SLM
Material elastomer part: CR with steel insert, black
Material base plate: aluminium
Product description: The air springs are based on an elastomer body reinforced with a steel ring. It enables an effective oscillation insulation. The elements are specified primarily of the frequency ratio and dynamic forces.
Execution: Depending on build height and load a natural frequency is reached between 3 and 5 Hz. By increasing or reducing the air pressure, the object can be leveled to the working height H.
Application: They are suitable for passive insulation of scales, gauges etc. also for the active insulation of slow running devices such as ventilators, compressors etc.
Assembly: Adhere to the assembly instructions!
Attention: SLM-elements may only be placed under load and according to type with maximal 4 to 5 bar of pressure. A load on the full surface is permit even w/o pressure. The specified load capacity Fz is valid for the maximum static load.
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The Fabreeka® Precision-Aire™ PLM series pneumatic/elastomeric isolation mounts are low frequency vibration and shock isolators which provide both attenuation of disturbing vibration and equipment leveling.
For vibration control applications, the pneumatic portion of these mounts provides isolation of vibration occurring at frequencies above 5.0 Hz.
For shock or impact applications, the outer elastomeric wall construction provides a high deflection shock mount. A low natural frequency (3.0 Hz) can be maintained by utilizing an external spacer to prevent "bottom out" condition.
Some features and benefits of PLM mounts:
PLM isolation mounts will continue to isolate with no pressure having a vertical natural frequency of approximately 10.0 Hz
The vertical to horizontal natural frequency ratio is approximately 1:1 with a degree of horizontal stability
1/8 NPT female fitting molded into sidewall allows for tank valve or pneumatic fitting
Viscous damping option provides increase in damping for large dynamic inputs.
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Low frequency high performance shock and vibration isolator for passive and active applications
Construction
Moulded CR (Neoprene) oil resistant and non ageing rubber upper chamber with integral aluminium (SLM 1-12) and zinc plated steel (SLM24+) support plate with tapped attachment hole, side wall reinforcement and integral base ring bolted and sealed onto a aluminium (SLM 1-12) and zinc plated steel ( SLM24+) baseplate.
Baseplate can be bolted down to support surface if required. Standard version with Schraeder Inlet Valve.
Other valves on request.
Features
Ratio of vertical to horizontal stiffness ca 1:1
Shock absorption amplitude up to 15mm
Natural Frequency range (depending on load) 2.8-5 Hz (see table).
Deflated (no air pressure): ca 8Hz See Load Spreader Plates LSP.
Applications:
CMMs, Surface Plates, Presses, Test Beds, Turret Punch Presses, HVAC Scientific and Test Equipment.
Levelling Range
+/- 5 (6)mm (see table)
Delivered with Grade 8.8 Zinc plated attachment screw (Other screw lengths available)
Control Systems
Self controlled levelling versions available with either mechanical-pneumatic or electro-pneumatic controllers.
Full proposals on application
Accessories
Load spreader plates LSP, It is important that the foot of the supported equipment covers the SLM fully.
Load spreader plates LSP can inserted between the top of the SLM and the underside of the machine foot if necessary.
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Rails elastic
Shocks multi-directional
Supports engines
Supports big race engines
Fixing muffling
Washers
Supports soles
Supports universal
Montage sécuritif
Specific development
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ROSTA Anti-vibration Mounting Type ESL
ROSTA Anti-vibration Mounting Type V
ROSTA Anti-vibration Mounting Type N and NOX
ROSTA Anti-vibration Mounting Type ISOCOL / ISOCOL U
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The AA series has been designed for loads from 10 to 6000 daN. One of its most important feature is the multidirectional reaction which guarantees an optimal response along all directions. Its high safety level prevents the detachment of the appliances even if the elastomers should be completely destroyed. It can be fixed either with two or four bolts.
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RA™ Shielded Cup Mount
Effective vibration isolation for different types of machines with rotating movements.
Compressors
Pumps
Generators
Engines
The RA™ Mount loads the rubber profile in shear and compression obtaining good vertical flexibility with the advantage of horizontal stability. For even better isolation, the alternative RAEM™ or M™ can be chosen.
Its unique construction and the latest production methods make the RA™ Mount a high performance mount with the following advantages:
- Rubber features are utilized effectively combining compression and shear
- Tight tolerances on dynamic stiffness rate for accurate vibration calculations
- Wide load rating options
- Corrosion protected to cope with arduous environments
- Strong base material withstands loads without deformation
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EH™
Type EH™ mountings produced in natural rubber and neoprene are designed to achieve effective vibration isolation on engines, operator cabins other ancillary units.
Typical applications are, Off-highway equipment, Military vehicles, Transport machinery, Industrial mobile machinery.
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WM Berg carries a full line product that provides precision leveling for lightweight and heavy machinery.
These products are widely recognized for excellent vibration and shock absorption characteristics.
The material's unique properties make it ideal for applications involving heavy machinery that require both shock absorption and vibration isolation.
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Vibration Damping Machine Mounts featuring:
- High Load Capacity
- Precision fine screw thread height adjustment
- Excellent vertical and horizontal shock and vibration isolation performance
- Loadings per mount up to 25 tonnes
- Predictable performance
- Machine installation without bolting down
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The design of the RADIAFLEX mount gives the following basic
characteristics:
- Radial elasticity greater than axial elasticity.
- The rubber works in:
- compression (axial).
- shear (radial).
- compression/shear according to the fixing method.
Advantages:
- Simple to fix.
- Simple and economical.
- Extensive range:
- 13 stud diameters.
- Several heights for each diameter.
- 5 methods of fixing.
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Originally designed for use with marine engines, this compact low
profile mounting is easy to install. It combines 3 way control of
the suspended equipment with relatively large static deflections
where the rubber is loaded in shear and compression.
The design incorporates bump and rebound control features
which limit excessive movements under shock loading. Top metal
cover gives protection against oil contamination and protective
finish resists corrosion attack. Propeller thrust on marine applications
is accommodated. There are four sizes in the standard range
with varying degrees of rubber hardness cater for point loads from
32 kg to 3000 kg. Natural frequencies as low as 8 Hz are possible.
Note: When used in marine engine applications with thrust forces
involved, the maximum load capacity is substantially reduced, see
table below!
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UNISORB® GK™ Low Frequency Foundation Blocks :
The GK™ Low Frequency Foundation Block is specifically used for isolating equipment where low interfering frequencies are encountered. They are typically used under concrete foundations supporting either source or sensitive machines. The highly specialized rubber compounds used, unique geometrical shape and carefully controlled load deflection characteristics make the GK block an excellent lower cost alternative to installations normally required to reach system natural frequencies as low as 4 Hz. GK™ Blocks are available in load ratings from 4,000 to 18,000 lbs.
Examples of GK™ Low Frequency Foundation Block applications include:
- Coordinate measuring machines
- Precision optical equipment
- Precision grinders
- Vibrating conveyors
- Lab equipment
- Automated equipment or robotics
- Equipment operating in severe shock and vibration environments
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INFAB™ Foundation Isolation
In some applications, it is not feasible to mount a machine directly on vibration isolators. An integral part of most machine tool installations is a properly designed foundation which will meet the machine's support requirements. Isolating a vibration-sensitive or vibration-producing machine requires isolation of its support mass or foundation.
INFAB™ elastomeric (rubber) isolators provide low frequency isolation from induced shock and vibration for applications requiring support foundations and inertia blocks. INFAB™ isolation systems can be designed to have a natural frequency as low as 6.0 Hz.
A vibration site survey/analysis will determine the levels of vibration existing at your site, which is essential for proper vibration control recommendations to be made. Please contact Fabreeka's® Engineering Department for assistance with your particular application or if you would like information regarding a vibration site survey.
Some features and benefits of INFAB™ foundation isolation:
* Standard INFAB™ isolators are available in load ranges from 1,800 lbs to 4,400 lbs per isolator
* Dynamically tested for natural frequency and damping data
* Natural frequency as low as 6.0 Hz
* Compatible with a variety of foundation structural support designs to meet project requirements
* Alternative isolator characteristics and complete system designs available
* Extensive database and history of installations and system designs
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The VIBROSTOP TSZ damper was designed for the isolation of large machinery, with significant weight and unfavourable ratio between the height of the centre of gravity and the base area, without fear of their falling. Loads range from 2000 to 20000 daN.
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UNISORB® Novibra®¹ Anti-vibration Mounts
The Novibra® product line includes various rubber to metal bonded anti-vibration mounts. Natural rubber is used, generally loaded in a combination of shear and compression to achieve the most effective levels of vibration isolation and to ensure long life for the mounts and machinery mounted on them.
UNISORB® Novibra® Mounts are available in a wide range of shapes and sizes which vary according to the application. Many models are available from stock.
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RA and EF uses the rubber profi le in shear and compression,
obtaining good vertical fl exibility with the advantage
of horizontal stability. For normal speeds of approx. 1500 rpm, the RA and EF type provides a degree of isolation
of 75-85%. For better isolation, the alternative RAEM or
M can be chosen.
Its unique construction and the latest production methods
make Novibra® type RA and EF a high performance
mounting having a number of advantages:
• Rubber features are utilised effectively combining
compression and shear.
• Wide load rating options, 40-2100 kg.
• Corrosion protected to cope with arduous environments
on land or marine applications (Fe/Zn8C as per ISO
2081).
• Fitted as standard with an integral fail-safe design device
with resilient stop, making RA and EF ideal for use in
mobile or marine applications. The RA/EF-mounts can
accomodate occasional shock loads to 5 g reference to the
weight in hardness 60° IRH. The mount will withstand
shock loads up to 2 g without plastic deformation.
• Clear and durable product marking so that mountings
can be identifi ed even after several years in operation.
• Domed shape cover to protect against oil contamination.
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Precision, height adjustable, vibration damping machine mounts for accurate, efficient and economical machine installation
Typical applications:
Machine tools, rubber and plastics machinery, printing and packaging machinery.
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New range of anti-vibrating supports Norelem.
Norelem proposes 4 new anti-vibrating supports adapting to all the situations of machining. The 02333, of share its small overall dimensions can be used on the narrow parts and for work of precision. The 02334 is equipped with a tapping making it possible to screw a support or a extension and supports an effort of 9000 Newtons. The 02335 is of extremely practical cylindrical form to manage the lack of space. Lastly, 02340 offer a very great facility of use with its blocking and simplified releasing.
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These machine mounts may be used in generator sets, power presses, motors, pumps, machine tools, etc...
They guarantee different degrees of stiffness in the three main axes.
Among that serie of mounts there is a range specially designed for marine applications.
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EGA MARINE
Initially designed to be used for marine applications
that mount is commonly used too for both
static and mobile equipment such as:
Gen-sets
Pumps
Compressors
Marine engines
Industrial engines
They are fitted with a mechanical stop or failsafe (rebound).
That machine mount allows controlling vibrations
in three directions and guarantees different degrees
of stiffness in the three main axes.
The metal cup (Cover) gives a good protection
against oils, greases and corrosion.
Natural frequencies as low as 8 Hz are possible.
There are 2 sizes in the standard range with
various degrees of rubber hardnesses.
NEW: Available in stainless steel too.
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