... temperature at the bottom edge of the seal in the axial piston pump could be 6 °C higher than that at the top edge when the pressure in the chamber was only 17.5 MPa [ 14 ]. Therefore, the fluid pressure and temperature in the piston/cylinder interface are not only high but also of large gradient in the axial...

...Matteo Pelosi; Monika Ivantysynova The piston/cylinder interface of swash plate–type axial piston machines represents one of the most critical design elements for this type of pump and motor. Oscillating pressures and inertia forces acting on the piston lead to its micro-motion, which generates...