Hydraulic Line Systems from STAUFF for Refuse Collection Vehicles

www.derkonstrukteur.de  DER KONSTRUKTEUR 2024/05 SPECIAL MICRO-DES IGN vibrations occurring when the bins are knocked out. The connec- tion concept: the Stauff Form EVO machine is used to reshape the tube end so that a so-called positive connection is created during fitting with a conventional fitting body and a union nut. The only conceivable leakage path is additionally secured with a Viton seal. Unlike a forming system, a cutting ring connection is produced when a metal ring with two edges cuts – as the name already indi- cates – into the tube surface when a union nut is tightened. This incision into the material limits the vibration resistance. The forming system, on the other hand, has a higher tear-out strength, which adds to safety under extreme conditions – strong pressure surges and vibrations as experienced in the refuse collection ve- hicles. Manufacturers are increasingly relying on the explicit rec- ommendations of the Stauff experts to address fires or traces of oil caused by leaking oil that unsettle residents and customers and attract negative attention. CLAMPS REDUCE VIBRATION AND NOISE Stauff recommends the use of NRC clamps, Noise Reduction Clamps, to reduce the noise level in the vehicles’ hydraulic line systems. These special clamps, which are used to attach tubes, for example, to the machine housing, have a specially shaped two- piece elastomer insert, which is integrated into the polypropyl- ene or polyamide clamp body. It decouples the tube from the sur- rounding construction, minimising the transmission of vibra- tions in both directions, and noticeably reducing the noise level. NRC clamps are compatible with standard steel and stainless steel fastening accessories. This means that the accessories do not need to be replaced when converting to NRC clamps in pro- duction. The contribution of these clamps to reducing noise seems rath- er insignificant in view of the often heavy and large vehicles with internal combustion engines. But, on the one hand, with 40 me- tres of hydraulic tubes and 60 metres of hose lines, we are talking about a rough estimate of up to 100 fasteners. On the other hand, waste disposal companies are increasingly converting their fleets to electric or hybrid-powered vehicles, so that every decibel that can be saved becomes even more important. Small, manoeu- vrable vehicles have long been used in the narrow streets of old towns, pedestrian zones or car parks. COMPACTLY AND SECURELY FASTENING LINES While Twin Series standard clamps are capable of securing a maximum of two lines per clamp body, Stauff MLC clamps (Multi-Line Clamps) have been designed to hold up to six lines. This is of particular interest for use in refuse collection vehicles: MLC clamps are suitable for use with tubes, hoses or cables. As mentioned above, the electrical “nerve system” of a standard re- fuse collection vehicle can be up to 100 metres long. Tubes and hoses are often routed in parallel. Stauff can also supply Multi- Line Clamps for up to six lines of different diameters on request. Smaller batches can be quickly and cost-effectively produced in a 3D printing process. Considerably less installation space or fastening surface is needed to secure the same number of cables using MLC clamps. One example to illustrate this: the total length of a clamp for six size 3 cables is only 216 mm. Six DIN Standard Series clamps ar- ranged side by side require 300 mm. The number of components required is also lower, not just the number of clamps required. There are also fewer other components needed to securely fasten hydraulic lines: cover plates and weld plates, rail nuts, safety locking plates, stacking bolts, other adapters and other accesso- ries. The fewer components that need to be attached, screwed and welded, the shorter the installation time and the lower the risk of installation errors. Images: Photographer Jan Kliment – stock.adobe.com , 05 Zoeller, otherwise Stauff www.stauff.com SPECIAL CLAMPS HELP TO REDUCE NOISE AND INSTALLATION SPACE 04 The Stauff Form EVO machine shapes the tube end so that a so-called positive connection is created during fitting with a conventional fitting body and a union nut 05 Well-known manufacturers of refuse collection vehicles appreciate Stauff components and collaborating with Stauff Engineering 04 05