Farrat Isolated Foundations
36Pages

Introduction 1.1 Farrat Industrial Heritage Farrat's heritage of engineering isolated foundations dates back to the 1960s. Since then, we have developed vibration isolation solutions for clients around the world across construction, industrial and power generation sectors. Equipment manufacturers are increasingly designing machinery to work faster and with more precision, whilst reducing weight and cost. Farrat Isolated Foundations are used in many applications to ensure the operating conditions - in terms of vibration levels - are controlled to within equipment specifications, to maximise...

1.3 Farrat Isolated Foundations Isolated Foundations (IFDs) either protect sensitive machinery from surrounding vibrations (passive isolation) or reduce vibrations and prevent them from migrating to the surrounding foundations (active isolation). How are Isolated Foundations constructed? IFD's comprise of a concrete inertia block, to which equipment or machinery is rigidly connected. Specialist Vibration Isolating Material, provided by Farrat, surrounds the inertia block to prevent vibration from either entering or leaving, depending on the particular application. What different...

How Farrat Deal with Enquiries Farrat have over 50 years' experience in providing vibration isolation solutions for machinery and equipment. This section provides the considerations and information required to enable Farrat to provide the most cost -effective Isolated Foundation solution for each enquiry. For lateral isolation, Farrat have several materials available as detailed in Section 6. If in doubt please contact Farrat. For full isolation, the key factors for vibration isolation are: 1. Total static mass of the machine and equipment, including tool and component mass 2. Dimensions...

2.3 Why Choose Farrat? Our engineering capabilities enable us to help you choose the right products to develop the optimum industrial vibration control solution for your specific application. Solutions for Industry and Power Generation Industrial Vibration Control (IVC) )) Vibration, noise and shock have significant effects on the performance of industrial and power generation equipment and their surroundings and establishing workable solutions can often be complex. Farrat's rich and varied history, coupled with cutting-edge and ever-improving techniques, makes us the ideal choice for...

Applications & Project References Global solutions exported from Farrat’s UK manufacturing facility. 3.1 Canning - Bodymakers / Cupper Presses Farrat have over 47 years experience designing and supplying Isolated Foundations for both bodymakers and cupping presses, supplying multiple production lines globally, including Europe, China, The Middle East and India. Materials used for cupping presses are: NBR ISOMAT Pads, Voidfiller & Vidam. For bodymakers we use Vidam & Voidfiller. Stolle, Hungary Stolle, Hungary Equipment Type: Cupper Press Equipment Type: Bodymaker AFRC, Strathclyde...

3.6 Automotive - Dynamic Test Rigs Sahil & Shah, Abu Dhabi Llanelli, Wales Triumph Motorcycles Equipment Type: Compressors *Case study on Page 24 Equipment Type: Dyno Roller Block Equipment Type: 4-Axis Road Simulator Kimber, Birmingham Daily Mail Press, Didcot Kaleva Printing, Finland Equipment Type: Massey 7 Tonne Drop Forge Equipment Type: Cerutti Flexo Press *Case study on Page 30 Equipment Type: Cerutti Flexo Press *Case study on Page 32 Equipment Type: Rhodes 350T Power Press Equipment Type: Metal Vehicle Crusher

Vibration Control - Basic Theory Vibration isolation reduces the level of vibration transmitted between a machine, building or structure and another source. Vibration can come from multiple sources, such as an imbalance of rotating machinery, impact from a metal stamping press and reciprocating engines and compressors - which have inherent imbalance. When sensitive equipment requires isolating, even low levels of vibration from sources such as overhead cranes, stacker trucks and accidental dropping of heavy objects can become a problem. Vibration isolation is a very complex subject,...

4.1.2 Natural Frequency (fn) Vibration isolation only becomes effective when the exciting frequency is greater than the natural frequency; therefore, when a machine increases to working speed, there will be an instance when resonance occurs and damping becomes an important requirement to limit the level of vibration. The natural frequencies for common structures are shown in Fig 4.2, for typical isolator types. Fig 4.2 Frequencies for Common Structures PERCENTAGE ISOLATION EFFICIENCY 4.1.4 Damping Ratios The damping ratio C/Cc is determined for each material by testing. The Cc is the...

Impact and Shock Isolation - Basic Theory Shock is created by impact of one mass against another, e.g. during operation of power presses, forging machines and drop hammers. The shock impulse caused by the impact travels through the machine structure as a deflection wave. If the machine is rigidly connected to its foundation, the deflection wave enters the foundation and the surroundings; with the shock causing the affected masses to vibrate at their own natural frequencies. 5.1 Isolating Impact or Shock Vibration A reduction in shock severity is achieved by the use of suitable isolators,...

)) Fig 5.2 shows a machine/structure that is rigidly connected to its foundation. Machine Vibration )) The peak force into the structure is very high and of relatively short duration. Ground Vibration )) The force that occurs in the machine is transferred to the structure with the exception of that which is absorbed by the machine. )) Fig 5.3 demonstrates the use of elastomeric or spring isolators between the machine and the supporting foundation. Machine Vibration )) With the correct isolator specification, the peak force transmitted to the supporting foundation is significantly reduced...

Isolated Foundation Configurations Farrat Isolated Foundations combine the use of high performance vibration isolation materials, mass damping and rigid, uniform fixing of the equipment to its foundation. There are two main types of vibration isolation systems: ) Lateral isolation (walls only) ) Full isolation (base and walls) 6.1 Full Isolated Foundations Full Isolated Foundations are typically used where vibration isolation is paramount and therefore requires isolation from the base of the inertia block in addition to the walls. There are a variety of construction types for this system...