The Basics. A hydraulic accumulator is a pressure vessel containing a membrane or piston that confines and compresses an inert gas (typically nitrogen). Hydraulic fluid is held on other side of the membrane. An accumulator in a hydraulic device stores hydraulic energy much like a car battery stores electrical energy.
Potential energy recovery method based on alternate recovery and utilization of multiple hydraulic cylinders Automation in Construction, Volume 112, 2020, Article 103105 Gong Jun, …, Jin Yongping
Two main types of energy recovery exist: electric recovery and hydraulic recovery. In the electric recovery system, a battery, ultra-capacitor, or both, are applied as the storage unit [8] . One electric motor is coupled to the hydraulic motor to form an energy recovery unit that converts hydraulic energy into electrical energy stored in the storage …
Shen et al. [3] presented a novel kind of electric hydraulic actuator having incorporated variable displacement pump to improve the dynamic response of electric hydraulic actuator. It combined the benefits of both electric and hydraulic systems with the intention to save energy and intensify control performance.
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 …
DOI: 10.3390/en15134757 Corpus ID: 250153136 Design and Research on Electro-Hydraulic Drive and Energy Recovery System of the Electric Excavator Boom @article{Li2022DesignAR, title={Design and Research on Electro-Hydraulic Drive and Energy Recovery System of the Electric Excavator Boom}, author={Lin Li and Tiezhu …
Energies 2022, 15, 4757 2 of 17 short time. Caterpillar [6] developed an accumulator-based energy recovery system that has been successfully used on a 50 t hydraulic excavator. The energy consumption is reduced by 37% when the boom rises through the variable
The potential energy recovery of hydraulic excavators is very significant for improving energy efficiency and reducing pollutant emissions. However, the more common solutions for potential energy recovery require more energy conversion processes before these potential energies can be reused, which adds to the complexity and high cost of the …
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In this study, a novel double-stage hydraulic system incorporating a hydraulic controllable accumulator (HCA) was proposed to simultaneously improve the energy and working efficiency of the hydraulic fineblanking press. Within this system, an innovative controller was proposed to orchestrate the HCA''s operations, allowing it to …
In this paper, an electric servo actuator implementation scheme with an energy recovery link is proposed to address the potential energy being wasted when a load falls. The new electric servo actuator recovers the potential energy dissipated during the load-falling progress by using an accumulator. The accumulator can also provide extra …
Cheng [38] applied the accumulator and electric generator in hydraulic excavator to recovery the swing brakes energy during the during upper-structure acceleration. The energy efficiency was characterized by up to 25% greater fuel efficiency than in the standard model without the regenerative system.
The fuel consumption of hybrid electric vehicle with compound accumulator parallel hydraulic system is also calculated in the cycle simulation test, 42 L single high-pressure accumulator parallel hydraulic hybrid vehicle fuel consumption is 230.4 g, saving 20.4 g
The electric-hydraulic hybrid vehicle (EHHV) is an important research area of hybrid electric vehicles (HEV), which provides a competitive project compared to other hybrid technologies. This paper conducts comprehensive research on a master-slave electric-hydraulic hybrid vehicle (MSEHHV).
Hybridization is an effective method to reduce fuel consumption and emissions of toxic pollutants generated by hydraulic excavators (HEs). This paper first reviews various hybrid HEs architectures with electrical, hydraulic, or flywheel-based energy recovery systems (ERSs). Flywheel-based ERS is not widely used in HEs but …
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The hydraulic energy recovery and reuse unit consisting of accumulators and pumps/motors is connected in parallel on the original series hybrid system consisting of diesel engine, motor, generator, and battery. 5th IFAC Conference on …
The hydraulic accumulator has the advantages of high power density, fast response, stable operation and high cost performance. However, compared with the electric energy storage method, the hydraulic accumulator has low energy density and large pressure fluctuation while absorbing and discharging energy, which severely limits its application in …
1 122· LIN Tianliang, et al: Hydraulic Accumulator-Motor-Generator Energy Regeneration System for a Hybrid Hydraulic Excavator developed for the HEs. BRUUN[14] presented an application based on a hydraulic accumulator ER system and installed it …
The article presents a model and a simulation study of a new type of hydrokinetic accumulator with increased energy storage density. The basic elements of the accumulator are: a flywheel of variable moment of inertia (due to inflow or outflow of hydraulic fluid) and a variable displacement pump/motor. The first part of the article …
The hydraulic approach is to convert the recoverable energy to hydraulic form, store it in a hydraulic accumulator, and release it when there are requirements. Andersen et al. [12] studied an electrical ERS in hydraulic forklift …
Function of Hydraulic Accumulators. The primary functions of hydraulic accumulators include: Energy Storage: Accumulators store energy by compressing a gas when the system hydraulic fluid is pumped in, which can be released to do useful work when needed. Shock Absorption: They help absorb shock caused by sudden changes in …