Energy recovery offers the capability to provide more than 100% output without increasing the hydraulic input (oil flow) from the excavator pump.
While the impact energy remains constant, the breaker increases the blow frequency, which increases percussive performance.
How it functions
In the moment of impact, other breakers open the control slide valve to the tank connection and the percussion piston pushes the oil from the upper oil chamber back to the tank.
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.
During the operation the breaker is detecting continuously the hardness of the rock and is adjusting automatically the level of energy recovery.
- 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