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Mayr Power Transmissions has announced a complete modular system for wind power applications, featuring the company’s range of torque limiters, shaft couplings and electromagnetic safety brakes.

Although conventional hydraulic brakes can apply high brake torque, they are more prone to failure due to leaking callipers, damaged hoses and wear on the valves resulting in downtime and high maintenance and repair costs.

Mayr Power Transmissions said that its Mayr Roba-diskstop electromagnetic brake can be used as a viable alternative for small and medium wind power installations.

Under normal conditions, the turbine rotor is slowed by feathering the pitch of the blades, reducing the rotor speed before engaging the brakes.

On emergency stop, the brakes have to engage at full generator speed and absorb very high frictional work.

To cope with this, Mayr has developed special sintered brake linings that offer high thermal stability, more reliable surface pressures and very low wear rates.

At the core of the module is the Roba-DS coupling, featuring an electrically isolating GRP intermediate sleeve that can be disassembled without moving the gearbox or generator radially.

The coupling can accommodate up to four of misalignment and, using the latest computer modelling tools, the coupling’s torsional and compensation rigidity values can be optimised in line with operational requirements at the design stage.

Overload protection is achieved by an integrated frictionally locked sleeve.

The special friction material has been designed to maintain a stable and repeatable release torque exhibiting a tolerance of +/-15 per cent over 1,000 releases.

For security, the overload module is calibrated during manufacture to prevent the possibility of adjustment errors during installation.

The whole wind power module is designed to be maintenance free over its entire service lifetime when used under normal turbine operating conditions.

Where high friction work is encountered all that is required is periodic inspection and renewal of the brake linings.

Mayr Transmissions

Mayr are the first choice for torque limiters, clutches, electromagnetic safety brakes and precision shaft couplings.

Mayr combine more than 110 years of innovation, manufacturing technology and quality control with world-class levels of customer service to ensure we maintain our market leading position.

Torque limiters and friction clutches

  • Backlash free ball indent, magnetic and friction torque limiters for the protection of rotating machinery and other drive systems.
  • Torque range from 0.1 to 100,000Nm.

Electromagnetic safety brakes

  • Single and multi-circuit, holding and dynamic fail-safe brakes with EN81, IP67 and BGV C 1 options.
  • Torque range from 1.1 to 50,000Nm.

Precision shaft couplings

  • Torsionally rigid, backlash-free, flexible shaft couplings in a range of designs including metal disk, carbon spacer, bellows and elastomeric spider.
  • Torque range up to 110,000Nm.

Mayr’s products can be found in many of today’s most demanding of applications including:

  • Stage and theatre
  • Winching and hoisting
  • Water treatment
  • Wind energy
  • Bottling and packaging equipment
  • Machine tools
  • Food processing.

With a huge range of standard products and the ability to design and make application specific designs, you can be sure Mayr will have the perfect product for your equipment. Please contact us to discuss your requirements.

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