The stick-slip friction phenomenon is observed near zero relative velocity, during the
transition from static to dynamic friction, when static friction is greater than dynamic friction …

A numerical analysis was carried out to investigate the lubrication characteristics of spool
valves with spiral grooves. The three-dimensional flow field is obtained by solving the Navier …

Seawater hydraulic axial piston motor is an important and elemental component in
underwater tool system. The torque characteristics for a swash-plate-type seawater …

In fluid power engineering, efficiency and reliability optimization have become a major
objective. The interest in using fluid power transmission in wind and wave energy …

Axial piston motors rely on a close fit of piston to bore to minimise leakage past the piston
due to axial pressure drop. Machining imperfections in the cylinder bore and the piston …

Use of seals on the piston surface of servo hydraulic actuators causes, apart from excessive
wear, positional inaccuracies arising out of large mechanical friction due to physical contact …

This article presents a theoretical and experimental analysis of sealless pistons featuring a
special geometry capable of eliminating friction in pneumatic cylinders and valves. Three …

Hydraulic axial piston motor is one of the fundamental components in hydraulic systems; it is
widely used in engineered machine, especially in high-power drive or reciprocating motion …

Friction in servo hydraulic assemblies reduces the response characteristics of the system.
The friction is influenced by various factors including the geometry (form and surface errors) …

Mechanical power loss in pneumatic hammers comes from the friction between parts in
relative motion, and wear is among the failure mechanisms of the top hammer. Therefore, it …