Having experienced increased demand for torsionally rigid disc pack couplings for use in explosion-protected atmospheres, R+W Antriebselemente GmbH has expanded its range of industrial couplings. The disc pack couplings in the LP1, LP2 and LP3 series – including the 25,000 size – are now available for use in ATEX areas. The R+W disc pack couplings […]
Disk
Ringfeder talks couplings for aeroderivative gas turbines
By Ringfeder Power Transmission Gas turbines are available in many different designs and the power output of the individual models varies considerably – from 200 kW to more than 400 MW. The performance of gas turbines for industrial applications typically ranges from 5 to 40 MW. Dependent on the power, the speeds vary from 3,000 […]
Dodge Poly-Disc couplings
Poly-Disc Couplings This elastomeric “pin style” flexible coupling from Dodge has a molded polyurethane disc that helps cushion shock loads. It requires no lubrication and no periodic maintenance. Both flanges on the Poly-Disc coupling are machined all over and taper bored for Taper-Lock bushings. Specifications Sizes: 2.625 to 10 Bore Range: 0.5 to 3.25-in. [13mm […]
Dodge disc-style couplings
The Dodge Disc coupling offers torque capacity and misalignment capability resulting in longer life and improved reliability. Disc couplings have become the preferred design for pumping and compressor applications used in the oil and gas industry due to the high torque, speed, misalignment, and maintenance-free features. The advantages of the disc style coupling have also […]
Update on flexible-coupling considerations for OEM and plant designs
All couplings transmit torque and angular velocity. Flexible variations compensate for misalignment. Many of the latter even address vibration and improve system dynamics. Design considerations include machine or installation construction and backlash, torsional stiffness, damping, inertia, torque ratings, maximum rpm, size, misalignments, ease of installation, robustness, and cost. For power transmission (as in motors for […]
Servo couplings: Stiffness, damping, hunting, and stabilization considerations
Here we address considerations when specifying servo couplings to satisfy servo requirements — ever-evolving specifications that become more demanding all the time. By Tetsuya Niwa • Director of product planning and development Kei Yamada • Product Manager — Product planning and development Hiroki Goto • engineering specialist Paulo Castelo • Technical solutions supervisor • NBK America […]
R+W Coupling Technology at EMO
The 2017 EMO tradeshow will take place in Hannover, Germany from September 18th to 23rd. Over 2050 exhibitors from 45 countries will be showcasing their newest products and services at the world’s largest metalworking tradeshow. This year’s EMO motto – “Connecting systems for intelligent production” – conveys current topics and trends in the industry. Companies […]
Flexible-coupling considerations for motion-control designs in OEM and plant setups
Couplings connect rotating shafts in equipment powered by electric motors and other drives. All transmit torque and angular velocity. Flexible variations compensate for misalignment. Many of the latter even address vibration and improve system dynamics. Design considerations include machine or installation construction and backlash, torsional stiffness, damping, inertia, torque ratings, maximum rpm, size, misalignments, ease […]
Damping servomotor couplings — New ways to use flexible couplings to minimize hunting and boost system stability
August 27, 2017 update: The full-length technical feature on this servo-coupling topic of damping and gain setting is now live. New technological improvements in servomotors have spurred dramatic improvements in response frequencies. The catch is that vibration (and hunting) tend to arise when designers apply high gain settings to servo systems and use advanced couplings […]
Reaction forces from couplings: How to prevent or mitigate?
All flexible couplings compensating for misalignment cause reaction forces, and their effect is significant if misalignment is excessive. These often-overlooked reaction forces transmit to connected shafts and support bearings, and can cause damage to motion axes — especially on precision designs with delicate bearings and slender shafts. Though couplings get their compliance from elastomeric deflection, […]
