Mechanical Technology July 2016

⎪ Products and services ⎪

AeroMaXX parallel-shaft gear units for turbo applications

In addition to the inner housing, the technology also includes new BHS EcoMax sleeve bearings on the pinion shaft. These hydrodynamic bearings are optimised specifically for the application, and guarantee high-energy efficiency along with significant oil savings. By combining the inner housing and the specifically designed bearings, BHS AeroMaXX increases the gear unit efficiency by up to 0.5%. At the same time, oil consumption is reduced by at least 30%. Since only passive mechani- cal elements are used, the improvements can be achieved without any additional accessories or components such as pumps or seals. The overall operating behaviour, design standards and dimensions of the gear unit are also not affected by this technology and related costs for a system operator are amortised by the energy savings alone within one to two years. www.voith.com

package and plain bearing guide make this an attractive and economical option. The EXCM-30 series, with a precise and robust recirculating ball bearing guide, is designed for heavier working capacities of up to 3.0 kg. Offering x-axis stroke variants from 100 to 700 mm and y-axis stroke options from 110 to 360 mm, this model suits a wide variety of applications including workpiece positioning, component feed- ing, screwing and mounting. With an optional drive and controller package from identical design standards, un- changed overall operating behaviour and maximum reliability. Voith emphasises this with a 36-month warranty period – in both new systems and retrofits. The technology is manufacturer-independent and available immediately. Due to the high pitch line velocities of up to 200 m/s, oil swirling and oil squeezing in the gear mesh account for a substantial part of the power loss of high-speed turbo gear units. The BHS AeroMaXX technology reduces these losses by separating lubrication and cooling. An inner housing in the direct vicinity of the gear set absorbs heat and dis- sipates it into the bottom area on the external surface on the inner housing via cooling oil. This means that a substan- tially smaller volume of oil is required for the actual lubrication of the teeth contact surfaces, while the swirling oil/air mixture itself is minimised. rental and construction partners. The new compressors benefit from Atlas Copco’s pioneering air element design, making the compressor up to 150 kg lighter than comparable models. During the development phase, par- ticular consideration was given to efficiency and the latest advances in the 8 Series mean that fuel consumption is reduced by an average of 12% compared to predecessors.

Atlas Copco has launched the 8 Series, a range of 10 new engine-driven air compressors. Despite incorporating a full-size fuel tank, aftercooler and gen- erator, all models in the range fall below the 750 kg weight limit and therefore require no special driving license to tow. Reliability, efficiency and higher utilisation levels, coupled with superior performance, enable the range to offer a maximum return on investment for Voith has unveiled its new BHS Aero- MaXX technology turbo parallel-shaft gear units for high-speed, high power ap- plications at Power-Gen Europe 2016 in Milan. The inner housing and optimised sleeve bearings reduce power loss and oil consumption by 30% or more. The solution has a passive-mechan- ical character and does not require any additional accessories. Operators profit The Voith BHS AeroMaXX reduces losses due to oil swirling and oil squeezing in the gear mesh.

New 8 Series compressor range launched

The XAS 88 Kd is the largest machine in Atlas Copco’s new 8 Series compressor range.

The largest compressor in the range can produce 5.0 m 3 /min of air and can still be towed by a normal passenger car – and the inclusion of a new and updated HardHat ® canopy ensures the units are tough enough for the harshest conditions. Incorporating reliable Kubota engines, the compressors feature an anti airlock system for guaranteed starting. Service is made simple as all parts are easily accessible and simple spin-on filters are used. The 8 Series only requires one hour’s total service time for every two years of operation. The range initially comprises 10 models, ranging from the XAS 38 Kd, with a free air delivery of 2.0 m 3 /min, to the XAS 88 Kd, with an air delivery of 5.0 m 3 /min. Two models in the range also include built-in generators. www.atlascopco.co.za

Planar surface gantry for desktop applications The compact gantry EXCM from Festo offers maximum coverage of its working space and is ideal for applications where every millimetre counts. Designed using a parallel kinematic drive concept, the recirculating toothed belt driven by fixed motors, moves the slide within a two-dimensional area. Available in two ranges, the EXCM com- bines high functionality and compact design with an attractive price/performance ratio. The EXCM-10 series, with an x-

axis stroke range from 150 to 700 mm, and a y-axis stroke of 110 mm, allows for maximum working loads

and a z-axis inter- face for maximum motion flexibility, EXCM-30 provides an optimum solution for small part assembly

of 0.5 kg – making it ideal for light applications such as laboratory process automation. The integrated motor/controller

environments.

www.festo.co.za

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Mechanical Technology — July 2016