Motorsport technology comes to servovalves
A
Moog product story
Edited by the Engineeringtalk editorial team
Dec 6, 2007
Servovalves using DDV technology are inherently more energy efficient than a conventional two-stage servovalve as they have no pilot stage hydraulic flow.
Following the hugely successful adoption of the Moog E050 miniature cartridge direct drive valve (DDV) by the motorsport industry, Moog now offers this technology for servovalves and servo-proportional valves to provide the twin benefits of high performance and precision motion control in other industry sectors.
The cartridge design permits high-density fitting for applications where multiple valves are required to be mounted on a single manifold or in industries where weight and space are at a premium.
The weight of the cartridge DDV is only one-third that of the standard steel-bodied industrial version.
However, the robust mechanical design is retained, meeting the extreme performance and environmental demands of many industries, such as mining, petrochemicals, offshore and simulators for training and entertainment.
Servovalves using DDV technology are inherently more energy efficient than a conventional two-stage servovalve as they have no pilot stage hydraulic flow.
However, in the motorsport developed cartridge DDV servovalve, the spool leakage has been reduced by a factor of 20 compared with the standard valve.
For many applications, particularly on multi-axis machines, this allows smaller pumps to be used; reduced cooler sizes and improves total system efficiency.
This efficiency improvement is a result of reducing the clearance between the spool and cartridge body, Moog's latest machining processes and metrology equipment allowing much tighter tolerances to be achieved.
The new cartridge DDV was designed and developed at Moog UK's state-of-the-art development and manufacturing facility at Tewkesbury.
Rob Rivers, Senior Design Engineer at Moog Controls, says: "The cartridge valve has proved to be an ideal solution for any application where weight or space are a prime consideration".
Rivers continues: "We have recently dealt with enquiries from companies with diverse application needs, ranging from remotely operated submersible vehicles through to unmanned aerial vehicles (UAVs) subject to flight qualification".
The Moog E050 Series miniature cartridge DDV is a motorsport development of the established Moog D633-7 design, originally developed for the injection moulding industry.
This valve uses a linear electric motor, utilising rare earth magnets to actuate the flow control spool.
This miniature valve has a flow capability of up to 18 litre/min, meeting the requirements of the majority of motorsport applications.
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