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A novel energy recovery system for parallel hybrid hydraulic excavator.

Li W, Cao B, Zhu Z, Chen G - ScientificWorldJournal (2014)

Bottom Line: The results show that the proposed system is more effective than the conventional energy saving system.At last, the main components of the proposed energy recovery system including accumulator and hydraulic motor are analyzed for improving the energy recovery efficiency.The measures to improve the energy recovery efficiency of the proposed system are presented.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, China University of Mining and Technology, Xuzhou 221116, China.

ABSTRACT
Hydraulic excavator energy saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. The mathematical models of the main components including boom cylinder, hydraulic motor, and hydraulic accumulator are built. The natural frequency of the proposed energy recovery system is calculated based on the mathematical models. Meanwhile, the simulation models of the proposed system and a conventional energy recovery system are built by AMESim software. The results show that the proposed system is more effective than the conventional energy saving system. At last, the main components of the proposed energy recovery system including accumulator and hydraulic motor are analyzed for improving the energy recovery efficiency. The measures to improve the energy recovery efficiency of the proposed system are presented.

Show MeSH
Input power of the three cylinder systems.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4227448&req=5

fig2: Input power of the three cylinder systems.

Mentions: According to the operating condition of the hydraulic excavator, when the boom cylinder piston is contracting and the bucket cylinder and the bucket rod cylinder piston are expanding, the excess potential energy in the return oil lines can be recycled and reused. The input power of the three cylinder systems and the output power in the return oil lines are shown in Figures 2 and 3. From Figure 3, it is shown that the part of output power which is greater than zero can be recycled and reused. The input energy and the excess energy which can be recycled of the three cylinder systems are given in Table 1.


A novel energy recovery system for parallel hybrid hydraulic excavator.

Li W, Cao B, Zhu Z, Chen G - ScientificWorldJournal (2014)

Input power of the three cylinder systems.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4227448&req=5

fig2: Input power of the three cylinder systems.
Mentions: According to the operating condition of the hydraulic excavator, when the boom cylinder piston is contracting and the bucket cylinder and the bucket rod cylinder piston are expanding, the excess potential energy in the return oil lines can be recycled and reused. The input power of the three cylinder systems and the output power in the return oil lines are shown in Figures 2 and 3. From Figure 3, it is shown that the part of output power which is greater than zero can be recycled and reused. The input energy and the excess energy which can be recycled of the three cylinder systems are given in Table 1.

Bottom Line: The results show that the proposed system is more effective than the conventional energy saving system.At last, the main components of the proposed energy recovery system including accumulator and hydraulic motor are analyzed for improving the energy recovery efficiency.The measures to improve the energy recovery efficiency of the proposed system are presented.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, China University of Mining and Technology, Xuzhou 221116, China.

ABSTRACT
Hydraulic excavator energy saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. The mathematical models of the main components including boom cylinder, hydraulic motor, and hydraulic accumulator are built. The natural frequency of the proposed energy recovery system is calculated based on the mathematical models. Meanwhile, the simulation models of the proposed system and a conventional energy recovery system are built by AMESim software. The results show that the proposed system is more effective than the conventional energy saving system. At last, the main components of the proposed energy recovery system including accumulator and hydraulic motor are analyzed for improving the energy recovery efficiency. The measures to improve the energy recovery efficiency of the proposed system are presented.

Show MeSH