Many seals for turbine tasks

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Excerpt: There is a lot of sealing work in a nacelle. Hydraulic equipment, of course, needs them along with areas such as where blades meet hubs. These must all be weather tight yet allow rotation. Simrit Americas, Plymouth, Mich., manufacturers several designs in a range of materials for these applications. …

What to Expect from Hydraulic Seals

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Excerpt: To attain their highest possible capacity factor, wind turbines must be sited where they will be exposed to as much consistent wind as possible. An assessment must often show a site to annually have about 2,500 hours of wind at about 25 mph to make it viable for a utility company. Consequently, …

Considerations for Designing Turbine Hydraulics

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Excerpt: An efficient, responsive, and reliable blade-pitch control on a wind turbine is made from many valves, pumps, hoses, reservoirs, and brakes. They must all work together to meet the demanding requirements placed on the pitch control in a turbine hub. An effective hydraulic blade-pitch control (BPC) …

How clean is oil in the turbine? Monitor tells

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Excerpt: Operators of hydraulic and lubrication equipment are paying more attention to oil contamination. On the one hand, more value is being placed on well-thought-out, high grade filters. And on the other hand, more attention is being paid to monitoring the oil’s cleanliness. In the case of high-val …

Think proportional flow for blade-pitch control

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Excerpt: To provide smooth and consistent power outputs, wind-turbine manufacturers use hydraulics to set the “pitch” of the rotor blade. The Eaton Vickers KB range of proportional flow control valves from Eaton’s Hydraulics Operations, Eden Prairie, Minn., has been the frequently selected valve to …

Hydraulic yaw and pitch drives

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Excerpt: For years, Nabtesco says it has been developing hydraulic equipment, engine accessory and fuel systems, and flight control systems for several Japanese Defense Agency programs. Now the company, a manufacturer of hydraulic drives and controls, is expanding into energy-efficiency and environment-f …

Filters for wind-turbine hydraulics

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Excerpt: Eaton’s Vickers Filters handle flows to 450 gpm and pressures to 6,090 psi. Bypass valves, pressure drop indicators, and media grades facilitate filter installation and provide needed system cleanliness. A closer look at reservoir vent filters shows its useful features. These sport visu …

Hydraulic firm introduces quick-connect couplings

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Excerpt: The range of hydraulic couplings has expanded for CEJN Industrial Corp., Gurnee, Ill, with several new series. Several new products meet the ISO 16028 standard and are available in many versions and sizes, including couplings in steel and stainless steel with a working pressure to 500 bar. ISO 7 …

How to protect high-pressure hydraulics

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Excerpt: A new rupture-disc assembly for wind-turbine hydraulic brakes protects equipment from damage and down time in the event of overpressure. Intended for the hydraulic brakes and yaw brakes of wind turbines, the rupture-disc assembly, model CD31179 provides accurate and leak-free overpressure relief …

Pitch controls: electric, hydraulic, or something new?

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Excerpt: Dr Sherif El-Henaoui                                                                                                                                              Engineering Director                         …