What is the potential energy of the boom cylinder?
Seen from Table 1, the energy that the boom cylinder can be regenerated is 132,809 J, which accounts for 51% of the total regenerated energy. As the swing ERS is similar to the braking ERS in a vehicle, the boom ERS attracts much attention to reduce the energy losses in HEs. Therefore, this paper focuses on the boom's potential energy. Table 1.
Can a four-chamber cylinder system save energy?
The power of the four-chamber cylinder system slowly approaches that of the two-chamber one at the end of the lift phase. It is inferred that the recovered energy from the high-pressure accumulator is run out of for assisted lifting. Therefore, significant energy saving can be achieved with the proposed system. 7. Conclusion and future work
What is the regenerated energy of the boom cylinder?
The regenerated energy of boom, arm, bucket and swing were calculated in theory. Seen from Table 1, the energy that the boom cylinder can be regenerated is 132,809 J, which accounts for 51% of the total regenerated energy.
What are the advantages of a lift cylinder system?
According to Liang's work, the system can reduce the energy losses of the lift cylinder by 22%, decrease the energy consumption of the lift cylinder by 16.8%, and improve the overall average efficiency of lift cylinder by 20% compared with the original system without an ER unit. Nyman and Rydberg also studied a similar system . Fig. 15.
What is the use of hydraulic accumulator and counter balance?
The hydraulic balance cylinder and the hydraulic accumulator are used to implement the counter balance system which is designed to compensate the weight of the lifting mass. 40–60% of the lifting energy can be saved with the combination of the counter balance and battery obtained from the simulation.
How are energy storage accumulators arranged?
One chamber is arranged to the energy storage accumulator for energy saving. Other chambers are flexibly connected to the pump ports for variable transmission ratios. Areas of multiple chambers are designed to permit a symmetric single-rod cylinder. Three modes are switched by solenoid valves to expand force-velocity capabilities.
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