1 year ago

MDA Technologies 2/2016

MDA Technologies 2/2016

Shaft couplings provide

Shaft couplings provide accurate measuring results MACHINE ELEMENTS Shaft couplings are extremely essential components for torque measuring flanges in test benches. By reliably compensating for any shaft misalignments, they ensure accurate measuring results and also protect the bearings against wear. The couplings of Roba-DS series from Mayr power transmission are tried and tested, backlash-free and torsionally rigid. About Mayr power transmission Founded in 1897, Mayr power transmission is a family-run company based in Mauerstetten, in the Allgäu region of Germany. Mayr is leading manufacturer of safety brakes, torque limiters and shaft couplings. These products are primarily designed for application in electrically driven machines and systems. They can be found, for example, in filling plants, in machine tools, in packaging and printing machines as well as in elevators, in wind power plants and in stage technology. Currently, approximately 600 employees work at its headquarters in Germany. Worldwide, Mayr power transmission has more than 1000 employees. With production plants in Poland and China, sales subsidiaries in the USA, in France, Great Britain, Italy, Singapore and in Switzerland as well as 36 additional country representatives. Short development times, an improved degree of efficacy or increased energy saving potential – the requirements on test benches are consistently increasing. As the core of modern test benches, the performance requirement on torque measuring flanges is increasing as well. These torque measuring flanges themselves have to supply precise and reliable data even in maximum performance and high-speed applications. Here, however, the measuring result is always only as good as the shaft misalignment compensation coupling used. In order to minimise the disturbance variables affecting the measuring flange, the shaft couplings are of decisive importance. Such disturbance variables frequently occur due to alignment errors in the drive line. Therefore, radial, angular and axial shaft misalignments occur in almost all applications between the input and output sides. Even a high-precision alignment of the shaft train with state of the art laser alignment devices can only assist to a certain extent. The misalignments cannot be completely eliminated due to the existing tolerances in the measurements of the components used and the external influences such as temperature. Therefore torsionally rigid shaft misalignment compensation couplings are used together with the measuring flange. Roba-DS compensating couplings, from Mayr power transmission are especially tailored to the requirements placed upon them by modern measuring flanges. High performance, low downtime and lower costs The couplings of the Roba-DS series, compensates for radial, axial and angular shaft misalignments. They ensure precise measurement results and protect the bearings installed in the shaft train against unnecessary loads. This consequently reduces the unnecessary downtimes and costs. On the Roba-DS couplings, the nominal torques stated in the catalogue can be used without any restrictions. A reduction of nominal torque due to offsets, load complexes or balance requirements is not required. The couplings are compact and combine high performance density with backlash-free function. They transfer torques up to the nominal torque backlash-free and with a consistently high torsional rigidity. The stated shaft MDA Technologies 2/2016

Backlash-free and torsionally rigid Roba-DS disk pack couplings compensate for radial, axial and angular shaft misalignment. They thus not only ensure precise measurement results, but also protect the bearings installed in the shaft train against wear misalignments can be utilised in total to 100 % without affecting the transmittable torque. Tailored to test bench requirements The couplings are particularly robust and durable. They have a low mass moment of inertia, high balance quality and also feature quiet running properties. Depending on the construction size, n The standard designs of the Roba-DS coupling cover a speed range from 8,000 to 18,000 rpm, and are balanced to a balance quality of G 2.5 (reference speed 3,000 rpm). n In the case of the high-speed constructional design, on which the individual parts are produced with extremely high accuracy (quality IT5) and reduced axial and shaft run-out tolerances, speed values of up to 30,000 rpm are permitted. The balance quality of the coupling is G 2.5 at a reference speed of 5,000 rpm. The connection of the Roba-DS couplings and the measuring flanges on the shaft train are generally conducted backlash-free via high-quality shrink disk hubs. Different coupling construction designs especially tailored to the differing requirements of the test benches and flexible combination options also permit the On the Roba-DS disk pack coupling, the nominal torques can be used without any restrictions. They transfer torques up to the nominal torque completely backlash-free and with a consistently high torsional rigidity integration of measuring flanges into almost any test bench and drive constellation. Photographs: Chr. Mayr GmbH + Co. KG igus ® dry-tech ® ... lubrication-free bearings made easy ... A kit to save costs ... drylin® W Lubrication-free linear technology from the biggest tool kit drylin ® W: linear bearings for quiet and easy running, insensitive to dust and dirt. Configured and installed quickly and easily. For line, flat and room gantries. Developed individually as a custom-made solution or delivered as single components and complete system in a minimum of 24 h. plastics for longer life ® igus ® GmbH Tel. +49-2203-9649-145 Visit us: Hannover Messe - Hall 17 Booth H04 IGUS+Messe.indd 1 17.03.2016 15:28:47 MDA Technologies 2/2016


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