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HIGH PRECISION CYCLOIDAL GEARS PRODUCTS GEARS & GEARBOXES
Cycloidal gears from Nabtesco are a key technology for efficient automation solutions. They ensure high-precision positioning throughout their service life (hysteresis loss of 0.5 to max. 1 arcmin) and are designed for excellent dynamic behaviour, load-bearing capacity (shock resistance up to 500% of the rated torque) and smooth operation. The company has developed the Neco
(servo gearboxes in a modern, clean design) and NecoHT (high-torque gears for heavy-duty applications) series for automation in mechanical engineering. These innovative plug & play gears combine performance, economy and convenience, and offer a high level of modularity. The combination of standardised elements allows the use of numerous defined interfaces for a broad spectrum of drives. This guarantees faster assembly, maximum flexibility in the motor connection, economical series production and high availability with shorter delivery times. The hollow shaft gears of the RD-C series are ideal for routing of cables and hoses. The large hollow shaft allows space- saving routing of data and supply lines, as well as drive shafts, while simultaneously increasing the load-bearing capacity. It does not remain rigid, but is designed to rotate at the output rpm, with the advantage being that a sensor on the hollow shaft can determine the position of the drive shaft. The RD-C series comprises servo gearboxes with three different
NEW COMPACT GEARHEAD MINIMISES HEAT AND ENHANCES EFFICIENCY
New to Portescap’s 22mm gearbox portfolio is the R22T gearhead. As a mid-torque gearhead, the R22T fills the gap between the light-torque R22 and high-torque R22HT gearheads. Fully compatible with Portescap’s brush DC and
mounting variants: direct, angled and belt driven. Their high positioning accuracy, exceptional performance and compact design are said to make them a feasible alternative to conventional rotary indexers. For mobile automation solutions,
Nabtesco offers a fully integrated and decentralised drive unit with a Mecanum wheel that combines utmost precision with maximum robustness, reliability and durability, thus fulfilling all requirements of modern automated guided vehicles (AGV). The RV-W Mecanum wheel drives also
allow high torque capacity in a compact design and are equipped with an integrated main bearing for optimal absorption of the radial and axial forces generated. Maintenance-free operation of the compact and extremely robust drive concept is ensured thanks to cycloidal gears.
Nabtesco
www.nabtesco.de/en
GEAR UNITS HELP PRODUCE ‘GREEN STEEL’
Three high-speed special gear units are being supplied by RENK Group (via RENK-Maag) to Siemens Energy Compressors for use in compressors for the production of ‘green steel’. This is part of the ‘SALCOS’ – Salzgitter
Low CO2 Steelmaking – project of the Salzgitter AG steel group. The gear units are developed and built at the RENK site in Winterthur, Switzerland. They are used in a direct reduction plant in Siemens compressors. In direct reduction, iron ore is converted into sponge iron with the help of a reducing agent. In the process, the reducing gas dissolves the oxygen out of the iron ore without it melting. This process takes place in the direct reduction plant at overpressure and at about 1,050˚C. The iron ore
is reduced to sponge iron. Instead of CO2, this technology produces water, which in turn is reused in the integrated process. In a direct reduction plant, both natural gas and hydrogen can be used flexibly as reducing agents. In this way, the natural gas content is gradually reduced and finally completely replaced by hydrogen. Nadine Despineux, CEO of RENK’s Marine & Industry Division, commented: “With our innovative
our customers are able to switch to hydrogen-rich reduction gas without structural changes to the integral gear compressors. As the name suggests, the gearbox is an integral part of this.” Adding to this, Thomas Fritschi, managing director of RENK-Maag in Winterthur, said: “Our high-speed gear units for compressors are an important component for the ramp-up of the hydrogen economy – whether for storage, processing or transport. These turbo compressors are characterised by a high pressure build-up and are suitable for large gas volumes. Specifically, we are talking about gear units with a speed of 8,000 to 50,000 revolutions per minute – but we have also produced units with
gearbox solutions for the compression of hydrogen, we regularly push the limits of what is technologically feasible with incredibly high speeds. This way, we are already helping to
reduce CO2 emissions in steel production by around 30%. Water is then produced instead
of CO2. This way, we support our customers significantly on their way from fossil energies to climate neutrality. And we see great growth potential, because the entire industry is currently converting its production processes.” Clemens Förster, sales manager of Siemens Energy Compressors, added: “With our technology,
52 DESIGN SOLUTIONS NOVEMBER 2023
a speed of over 60,000 revolutions per minute. Just for comparison, the engine speed of a passenger car in normal driving is a maximum of 2,000 to 3,000 revolutions per minute.” Against this backdrop, RENK is increasingly using the company’s existing industrial know-how in the field of high-speed gear solutions, couplings and slide bearings in new areas of application, including carbon capture technologies and heat pumps, in addition to hydrogen.
RENK Group
www.renk.com
brushless DC slotless motors, the new product has a diameter of 22mm, a full metal design, and delivers continuous torque up to 1.5Nm. According to the company, the new gearhead stays an average of 20% cooler at desired working points than competitive solutions, resulting in improved energy utilisation, decreased energy wastage, and an extended lifespan. Suitable applications are those that require mid-range
performance in a powerful, compact package – such as those in robotics, industrial power tools, and aerospace and defence. They can, for example, be used in Control Actuation Systems (CAS), window shade actuation, grippers, pruning shears, and powered screwdrivers.
Portescap
www.portescap.com
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