DS-APR22-PG34+36_Layout 1 12/04/2022 15:36 Page 2
FEATURE
SPRINGS & SHOCK ABSORBERS
stainless offers higher corrosion resistance due to itsmolybdenumcontent and is widely used in chemical or sea water applications. Another way to minimise corrosion is by
applying a finish to the component’s surface, such as a zinc plating or zinc phosphate coating. This minimises exposure to oxygen but achieving full coverage between the spirals can be a challenge. Highly corrosive environments can often
require more than the protection offered by stainless steel. High-performance alloys such as Inconel and Elgiloy are specifically designed to survive harsh environments.
COST EFFECTIVENESS
When selecting an alloy for your wave spring, working with a specialist can help you get the information you need. For example, TFC’s engineers can develop bespoke wave springs that meet the required load characteristics and can operate in even the harshest environments. Before designing a spring, they will work through the application’s space constraints and spring performance characteristics, factoring these in.
TFC T: 01435 860349
www.tfc.eu.com/
“When springs are used in environments close to or outside their recommended operating temperatures, it can lead to
permanent deformation, or in the case of extreme cold, to a brittle fracture”
For more information on how your application could benefit from a Smalley Wave Spring, visit
https://tfc.eu.com/products/smalley-wave-springs-retaining-rings/
SPRING COUPLINGS REDUCE VIBRATION
Construction machines powered by modern diesel engines can benefit from Torsion Control Products’ (TCP) spring couplings. With their torsional elasticity, these durable, robust couplings dampen the vibration from the powertrain and can work in harsh conditions. The objective of every construction
machine manufacturer is to develop a long-lasting powertrain that is perfectly compatible with the construction vehicle and its work process, and that functions reliably in the harsh operating conditions. Torsional vibration is generated by the diesel-engine drives in construction machines, but also by many process machines such as the milling drums in road planers, the chipper drum in wood chippers, or even crusher drives. The aim is to influence these vibrations in such a way that none of the powertrain components suffer any damage – and this is where the steel spring couplings from Torsion Control Products are ideal. Of additional benefit, the couplings can be
MEASURING WEAR AND TEAR ON VEHICLE PARTS
At Novares ultra-modern test centre in Lens, France, a vibration shaker system is used to measure premature wear and tear on vehicle parts. The machine used is the LDS V8900 HBT1220 shaker. The company’s aim was to measure the
vibration acting on plastic parts, as well as their noise emissions under increased loads. It therefore needed a system that could withstand relatively high levels of vibration for long periods, and measure the effects at different temperatures. Novares contacted test and measurement expert, Hottinger Brüel & Kjær (HBK), with their
specifications and, following a consultation, the V8900 shaker was recommended as the best system for carrying out a wide range of Novares’ current and future tests. Plastics behave differently depending on temperatures, so most vibration tests are performed
in a climatic chamber. The V8900 system and its slip table are very suitable for this requirement, as they adapt easily to the different climatic chamber models available on the market. Vibration tests, combined with climatic tests, are one of the most representative of the real environment and the most effective in terms of immediate results that can be used to evaluate products. Lens Novares’ laboratory manager, Bertrand Dufour, said: “When it comes to the automotive
industry’s criteria for material that will be used in the near future, plastic remains the reference material due to its potential for mass gain – an important factor in view of the increased weight of new engines, especially hybrid and electric motors – and flexibility. The final products must be recyclable, which is already a challenge, as they contain recycled material whose properties are ultimately too variable and the recycling channels too weak. Plastics must be able to withstand the increasingly delicate moulding requirements and under the bonnet temperatures of 3- cylinder engines.” He added: “HBK was able to take all this criteria on board and guide us towards the best possible
solution, with a shaker capable of carrying out a very wide range of our current and future tests: a future leaning towards the evolution of electric and hydrogen engines.”
Hottinger Brüel & Kjær
www.bksv.com/en
3 DESIGN SOLUTIONS APRIL 2022 6
adapted to specific requirements through different configurations. In particular, the spring characteristic and the damping property are important, and an optimised selection ismade on the basis of a torsional vibration calculation. The Smart Damping technology is especially effective here in suppressing undesirable transmission chatter. Hydraulic Power Take-Offs (HPTO) fromPT
Tech engage the power take-off. “Besides the sophisticated design of their vanes, they are also equipped with a specially developed controller, which enables themto accelerate highmoments of inertia without causing the vanes to overheat,” said Dr.-Ing. Peter Jaschke, head of business development at Torsion Control Products. If hydraulic pumps also need to be driven, the HPTOs can also be fitted with up to four additional power take- offs. Special adapters are available to enable the pumps to be connected directly. If the drive has to be protected from high
overloads, Dr. Jaschke recommends torque limiters from PT Tech, or – depending on the specification – shear pin couplings from Lovejoy.
Torsion Control Products
www.torsioncontrol.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58
