Energy recovery offers the capability to provide more than 100% output without increasing the hydraulic input (oil flow) from the excavator pump.
How it functions
The energy recovery feature keeps the control slide valve to the tank connection closed. The percussion piston pushes the oil from the upper oil chamber to the lower oil chamber in addition to the oil delivery from carrier pump. Thus the percussion piston accelerates within the first third of return stroke faster than without Energy Recovery. Then the control slide valve opens the connection from upper oil chamber to tank.
The piston is driven only by the carrier's pump flow. Because of the accelerated return stroke of the percussion piston within the first third the return stroke is shorter then without Energy Recovery. This increases the blow frequency. Increased blow frequency times impact energy result in increased breaker performance.
- Maximum utilisation of recoil effect
- Automatic activation of energy recovery if normal mode insufficient
- Accumulation of recovered energy into the hydraulic system
- Increased blow frequency
- Increased blow performance
- Higher productivity