Radial shaft seals for large bearings

Reinforced all-rubber HSS radial shaft seals minimize contaminants and extend service life for large bearings in wind turbine drive trains, say their developers. SKF seals are for installation or uptower replacement during maintenance procedures. Minimal space requirements allow for smaller and lighter bearing housings, potentially reducing turbine weight. The seals integrate Duratemp hydrogenated nitrile rubber,

2012: Trends in seals

For the highest possible capacity factor, wind farms are sited where they will be exposed to as much consistent wind as possible. Consequently, all parts of a wind turbine are subjected to extremes of weather, ozone, unusual stresses, and vibration. Things get worse offshore where they must also withstand the rigors of the sea including

Matching seal, shaft, and lube saves wind seals

An ideal combination of radial shaft seal, shaft surface, and lubricant can increase seal life three-fold and reduce friction at the sealing lip by up to 30%.   Nacelles become oily places when wind seals don’t work well. To find better seals, our companies developed a way to work in close cooperation with users to

Light-weight tradeoff: Polymer for steel

Victrex Peek (polyaryletherketone) polymers is said to be a good choice when replacing metal wind-turbine components. The high performance and light-weight material allows up to a 70% weight reduction. This can lower stress on the components and reduce energy needed to power the turbine. The tribological characteristics of this thermoplastic compared to metals also helps

Seals 101

Component design often overlooks the importance of well-engineered seals. Properly engineered seals increase the mean time between component failures, reduce manufacturing costs associated with the use of exotic coatings, and reduce power consumption due to unnecessarily high friction. Data required to select a seal includes: • Size – shaft, housing bore, and available seal width

The big impacts of small components

In July 2008, the Energy Efficiency and Renewable Energy Department of the U.S. Department of Energy published a document 20% Wind Energy by 2030 that included wind-energy volume projections. The projections were based on many factors and assumptions, including justification of capital, improvement of wind-turbine efficiencies, lower annual maintenance costs, and reliable component life. Increasing

PTFE seal wins 2011 innovation award

Turcon M12, a PTFE-based material launched in 2011 by Trelleborg Sealing Solutions, has received a 2011 Innovation Award from Flow Control Magazine. According to the company, the PTFE-based sealing material has unrivaled performance in key hydraulic sealing characteristics such as friction, wear, and high-pressure operation. Testing shows Turcon M12 resistant to most media, including a

Special polyurethane improves abrasion resistance

The Timken UltraWind P1 Seal is a significant wind-turbine bearing seal with a polyurethane design that provides increased resistance to abrasion for longer wind-turbine service life and more reliable performance than most other commonly used sealing materials. “Seals have an integral role in maximizing wind-turbine uptime and productivity because they prevent lubrication leakage and bearing

Magni celebrates 10 millionth gallon

In early May, gallons of coating rolled off The Magni Group’s Detroit production line, just like any other day. But what made this day special was that one of those cans would be deemed the the company’s 10 millionth.

Seals to keep grease and ozone out

To meet the extreme demands of the evolving windpower industry, one company has expanded line of nitrile butadiene rubber (NBR) sealing materials. Simrit’s two NBR developments are part of its Ventoguard line of materials specifically designed to offer grease and ozone resistance, low compression set, and low-temperature capability.