6 July, 2022

The importance of accumulators in wind turbines and general hydraulic systems

26 September, 2017

Hydraulics are commonly utilised to control the yaw, pitch and braking systems on modern wind turbines. Accumulators are typically used along with hydraulic power units to feather the blade pitch. Accumulators also serve as an auxiliary power storage device to quickly and safely rotate the blade to a null position in extreme wind conditions.

More importantly, in the case of an electrical power failure, accumulators are used as the energy source to activate the brake calipers of both the high-speed shaft and yaw-brake systems. The brake force holding time required can be as long as several days, which means the accumulators must have enough pre-charged gas pressure beforehand to ensure the turbine is held under control. It is therefore a critical maintenance issue that all accumulators have the correct nitrogen gas pre-charge pressure at all times.

Wind turbines commonly use piston type accumulators because of their smaller footprint and high-pressure performance. Piston accumulators are commonly fitted with Minimess charging valves due to their high-pressure capability, leak free design and safe ease of use.

Hydrotechnik has developed a range of nitrogen gas charging and testing kits specifically for the wind generation markets as well as for general hydraulic applications. The kits all utilise leak-free Minimess gas charging valves, and have adaptors to suit almost all modern accumulator designs even when Minimess is not fitted as standard to the accumulator


Buyers' Guide Search
Search for UK supplier by name
Browse by Product Group.
JUNE 2022 Issue To view a digital copy of the JUNE 2022 issue of Hydraulics & Pneumatics Magazine, click here.

APRIL/MAY 2022 IssueTo view a digital copy of the APRIL/MAY 2022 edition of Hydraulics & Pneumatics Magazine, click here.

For a FREE subscription please click here

July/August 2021 Annual Buyers' GuideTo view a digital copy of the JULY/AUGUST edition of Hydraulics & Pneumatics Magazine, click here.

For a FREE subscription please click here

BFPA YearbookTo read the latest BFPA Yearbook, click here
Talking Industry events in 2021Talking Industry Events in 2021
BFPA Training AcademyClick the image to go to the BFPA Training Academy website
Compressed Air & Vacuum Technology Guide 2018To read the official BCAS Compressed Air & Vacuum Technology Guide 2018 click here
Offshore Europe JournalOEE
Super Swivels
Impulse Automation Limited was established in 1960 and is based in the United Kingdom. We are an importer and distributor of mechatronic components used in a wide variety of industry sectors.Impulse Automation Limited
Hy-Pro FiltrationWEB LOCATOR