The rated pressure of common hydraulic pumps varies depending on their principle and geometric displacement but generally doesn’t significantly exceed 400bar threshold. While this is perfectly adequate for most industrial and off-highway applications, there are applications requiring very high force that cannot be achieved by the linear actuator supplied with common pump pressure due to the space constraints placed upon the actuator. Increasing the pressure by means of pressure amplification resolves this problem. This presentation deals with principle, design considerations, applications, and benefits of hydraulic cartridge pressure amplifiers integrated directly into the hydraulic linear actuators and developed by PistonPower. The resulting linear actuator with integrated pressure amplifier thus features higher power density compared to the conventional hydraulic linear actuators.
Science Journal 