Several hydraulic-brake produces from Carlisle Brake & Friction have been approved by Germanischer Lloyd (GL) Industrial Services. The brake models, WBA1-90-SC, WBA4-90, and WBA6-120, offer innovative and cost-reducing features as next-generation brakes, friction, and hydraulic systems. As part of the accreditation process, the GL representative ensures that the installation, operation and maintenance manuals are observed
Slowing and halting an 80-m-turbine rotor involves converting its kinetic energy into heat. Of course, there are several design decisions here. Rotor brakes control overspeed, and provide parking and emergency braking. These brakes can mount on the rotor or low-speed shaft, on the generator (high-speed shaft), and both shafts in some cases. Low-speed-shaft braking is
German company Liebherr is offering their hydrau-lic cylinder for hydraulic pitch adjustment in wind turbines to the American market. The company offerso both electromechanical pitch adjustment with gearboxes as well as hydraulic pitch adjustment with the corresponding blade bearings as a full system. Cylinders are supplied in accordance with a customer’s particular requirements, in-cluding piston rod heads and integrated stroke measuring systems.
A yaw brake model, FHGE, comes in three models, -77, -90 and -120. Each features a small air gap and few moving parts for a short response times and fast braking. Additional features include a large brake-pad area and low brake-disc temperatures. For the wind-energy market, the company manufactures rotor brakes that generate braking forces
MagnaShear motor brakes use oil-shear technology for longer service life even in demanding applications such as pitch and yaw drives and generator-holding brakes in smaller wind turbines. The proven technology transmits torque between lubricated surfaces – thereby eliminating wear on friction surfaces. A patented fluid recirculation system dissipates heat – a common problem in dry-braking
The requirements for pitch and yaw brakes include high reliability, long maintenance cycles, resistance to environmental influences, and a tight braking-torque tolerance. For pitch drives, one brake manufacturer has developed spring loaded devices as holding brakes that have to perform in a particular way in emergencies, even after a failure. The brake casing is encapsulated.
MagnaShear motor brakes work by shearing oil for longer service life even in demanding applications. Compressing a fluid shears its molecules– thus imparting torque to a stationary side. The brake eliminates the wear of friction surfaces. A fluid recirculator dissipates heat, a common problem in dry braking systems. Eliminating wear significantly increases service life and
David Brooksbank/Altra Industrial Motion. South Beloit, Ill./altramotion.com Brakes for wind turbines call for higher cycles rates, higher loads, greater reliability and often in more compact packages than those on conventional factory equipment. Slowing and halting an 80-m wind-turbine rotor involves converting its kinetic energy into heat. The same mechanical transfer occurs, for example, when stopping
A full array of caliper designs is available from Twiflex, Ltd. to meet the yaw braking-force requirements of any size wind turbine. All brake models are durable, hydraulically activated, and direct applied. Models T20 and T40 deliver up to 40 kN braking force, feature two-bolt side mounting, and are intended for light to medium-duty applications.
Twiflex brakes are fully assembled, provide high levels of reliability, easy electronic monitoring and maintenance, and come with organic or metallic linings. Friction liners are sized to ensure adequate heat dissipation during an emergency stop and with an even pressure distribution across pad surfaces. The brakes come in a range of braking forces from 100