14 fluid · 05 2024 Spektrum the transmission of vibrations and structure-borne noise. However, these clamps have been further developed over decades and with their differentiated property profiles thus fulfil varied applications in mobile and industrial hydraulics. An elastomer insert in STAUFF RI clamps guarantees an even greater damping effect. Noise reduction with the NRC clamp Stauff has developed the NRC clamp specifically for applications in which strong vibrations affect the hydraulic line system, and noise emissions affect the user. The “Noise Reduction Clamp” was originally developed for use in shipbuilding, where high demands are fundamentally placed on noise reduction, especially on passenger ships. This concept has been successfully transferred to other applications, with the result that manufacturers of electrically driven construction machinery have a product that has already been tried and tested under diverse loading. NRC clamps guide tubes in a specially formed twopart elastomer insert that is integrated into the plastic polypropylene or polyamide clamp body. The contour of this insert, which was developed by Stauff Engineering in Werdohl, among other things, in the course of tests in its own sound laboratory, has a particularly small contact area to both the tube and the clamp body. This results in the mechanical damping of vibrations in the line and thus correspondingly reduces the noise level to a minimum. These clamps are compatible with the conTwo questions to Dipl.-Ing. Oliver Wagner What do OEMs need to consider if they want to expand their product range with electrically driven machines? First of all, as with the development of construction machines with combustion engines, the hydraulic line system also needs to be included from the outset in electrically driven machines. This starts with the complete design and routing of the lines in the machine from the pump to the operating unit, and extends to the selection of the individual components, such as the tube and hose connections or the fastening elements. Our consulting services in this area are well known and used by many OEMs. Mobile hydraulics is now a particularly innovative sector and the machines have become increasingly complex in recent years, for instance in terms of equipment with sensors and actuators for automation processes or measuring technology for preventive maintenance. Accordingly, Stauff has already dealt extensively with the routing and fastening of electrical cables in recent years. Electrification of the drive is just one of the many requirements that OEMs approach us with. Has the Stauff product range been fundamentally expanded in recent years to include clamps for electrical and other supply lines? JOne example of this is the CHC clamp, which we devel-oped to fasten corrugated hoses. It is now available in various sizes and is part of our standard range. However, we also design special solutions, both for OEMs who are now developing electrically driven machines, and also for other innovative industries. For instance, our collaboration with a manufacturer of wind turbines resulted in the development of the WPC clamp (Wind Power Clamp). The requirements here are very specific: among other things, the retention forces have to be consistently high over a wide temperature range. The cables are protected by ultra-soft clamping jaws made of flameretardant UL plastic. Straightforward, largely manual assembly is also critical in the special installation situation in the towers of wind turbines. Other sectors always benefit from our close cooperation with our customers’ Engineering teams. Dipl.-Ing. Oliver Wagner is a developer with a focus on electrical engineering in design and development at Stauff Germany. Stauff has extended the range by a special clamp body version, type CHC, to fasten thermoplastic corrugated hoses, which are used to protect and bundle electrical cables.
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