PRODUCTS SPRINGS & SHOCK ABSORBERS FROM TORSION SPRINGS TO SOLUTIONS FOR THE OIL AND GAS INDUSTRY
To meet application demands, a wide range of springs are available from Lee Spring. One example is the torsion spring (right), which is suitable for where axial rotation requires control. These compactly wound springs look like a common compression spring mounted on a rod or into a cylinder, but are activated by radial leverage on their end legs. The company offers seven angle sections for its
torsion springs – both left and right hand wound, which also facilitates usage in pairs to provide a balanced force at each point, ensuring that the returned piece seats properly. These are available in plated music wire and passivated stainless steel. Torsion spring ends can be bent, twisted,
hooked or looped, and are offered in a choice of 90˚, 120˚, 180˚, 210˚, 270˚, 300˚ and 360˚ free leg position. Custom leg end style choices can be developed, including straight torsion, straight offset, hinged and hook ends. According to the company, common
applications involve the need for a pre-loading to act as a counterweight – such as a rear tailgate or garage door. Other typical applications include clothes pins, clipboards, window shades, counterbalance mechanisms, ratchets and various types of machine components. Torsion springs are used for hinges, counterbalances and lever return applications, and as couplings between concentric shafts such as in a motor and pump assembly. Furthermore, many electronic devices utilise small
torsion springs to provide smooth operation of pop-up covers on various players, cameras, instrumentation etc. Specialist miniature
torsion springs are available with an outside diameter from 2.62mm
through to full sized units of over 50mm. Also available are Drawbar springs which feature
a central compression spring oriented so as to provide extension of its retaining structure when under load – a benefit where it is completely unacceptable for the spring link to fail catastrophically. They can, for example, be used for garden swing seats, boat mooring, and for tensioning of equipment that is likely to be left unattended for long periods, such as fences or gates. It also serves to provide a dual-stage loading capability where an initial high loading may be supported by the retaining frame, and when released allows the spring to provide a constant but lesser tension, such as with a swimming pool cover. There are a variety of material
possibilities including carbon steels, alloy steels, stainless steel 17-7, 301, 302, 304 and 316, Phosphor bronze, Hastelloy, Inconel 600, 718 and x750, Beryllium copper and Elgiloy. In addition, a matching selection of surface treatments are available, such as: zinc plating which
EXTEND MACHINE LIFE AND REDUCE NOISE
Vibration isolation mounts and rubber bumpers that can be mounted in various ways to extend machine life and reduce noise are available from Ruland Manufacturing. These are cylindrical in design and have a metallic core encased in a rubber jacket with threaded components that allow them to be connected to many different types of equipment or flat surfaces. Vibration isolation mounts have a threaded stud or tapped hole on both flat ends to
connect two parts of a machine together; while the rubber bumpers have a threaded stud or tapped hole on one end and a rubber jacket over the other to act as end stops or mounting feet. The rubber jackets have 55 shore A durometer for a balance of shock absorption and rigidity. The metallic cores are made from 304 stainless steel for high corrosion resistance and can be used in washdown applications, while the zinc-plated steel cores have higher strength and are ideal for general purpose use. According to the company, both are referred to as sandwich mounts and rubber buffers
because they function as shock or vibration isolators sandwiched between two machine components or surfaces. They are often used to cushion the impact load of machine guard doors closing, installed between motors and mounting frames to isolate vibration, and used as feet on machines to prevent slipping and reduce shock to floors, helping to protect machines and make for a safer, quieter work environment. All configurations are available in
imperial threads ranging from #8-32 to 3/8-16 and metric threads from M3 to M16
with outer diameters ranging from 8mm to 100mm or 0.39 to 3.11 inches. The smaller sizes are commonly used in light duty applications such as machine guard doors, while the large sizes are better suited to more demanding applications such as conveyors where they can be sandwiched between the frame and legs for rigidity and reduced noise. The vibration isolation mounts and rubber bumpers are sourced from J.W. Winco.
Ruland Manufacturing 24 APRIL 2020 | DESIGN SOLUTIONS
www.ruland.com SHOCK ABSORPTION GUIDE
As a key component in many engineering applications, caps and plugs offer protection during the manufacturing process as well as helping during transportation and storage – and it is often vital that they offer shock absorption qualities. Shock and transit damage cause downtime and waste,
disrupting the supply chain. In Essentra Components’ new guide to shock absorption and preventing damage in transit, the company explains: how caps and plugs help in the manufacturing process; how to identify the right material; and then describes the various types that are available. The guide can be viewed on the company’s website:
https://www.essentracomponents.com/en- gb/news/product-resources/caps-and-plugs-shock- absorption-and-preventing-damage-in-transit.
Essentra Components
www.essentracomponents.com
offers corrosion resistance, nickel plating for good corrosion resistance and good conductivity, black oxide, shot peening to reduce stress or fatigue, powder coating to give corrosion resistance and colour coding. Electro Gold plating is also available to offer conductivity if used in electrical applications. For use in the oil and gas industries, Lee Spring
offers high performance exotic nickel or cobalt alloy custom solutions. These, the company explains, can be used in conditions that would excessively stress normal steels – so nickel alloys such as Inconel 600, X-750 and 718, also Nimonic 90, Hastelloy C-276 and Monel 400 or K-500 are used. Parallel cobalt alloys include Elgiloy and MP35N. These exotic alloys are oxidation/corrosion resistant in high temperature, high pressure, environments.
Lee Spring
www.leespring.co.uk
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