Research on energy regeneration and effect of dynamic characteristics of secondary control swing for hydraulic excavator system

Chowdhury, Puja; Das, Dabdatta; Truong, Bui Ngoc Minh; Ahn, Kyoung Kwan

doi:10.1109/iccas.2015.7364682

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…Chowdhury et al [34] proposed a new swing system using an EHA, and two pairs of hydraulic pump-motor. The maximum energy saving capacity in these cases could be achieved up to 23%.…”

Section: Ers Using Electrical Energy Storagesmentioning

confidence: 99%

See 1 more Smart Citation

Developments in energy regeneration technologies for hydraulic excavators: A review

Cuong

Dang

Dinh

et al. 2021

Renewable and Sustainable Energy Reviews

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“…Chowdhury et al [34] proposed a new swing system using an EHA, and two pairs of hydraulic pump-motor. The maximum energy saving capacity in these cases could be achieved up to 23%.…”

Section: Ers Using Electrical Energy Storagesmentioning

confidence: 99%

“…Therefore, this approach has proved unsuitable for commercial products. Chowdhury et al [34] replaced the conventional hydraulic circuit by using an EHA system as shown in Fig. 28.…”

Section: Types Of Swing Energy Regeneration Technologiesmentioning

confidence: 99%

Developments in energy regeneration technologies for hydraulic excavators: A review

Cuong

Dang

Dinh

et al. 2021

Renewable and Sustainable Energy Reviews

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“…The secondary regulation technology is based on the pressure coupling system, in which multiple different loads are connected in parallel on the constant pressure network. Then through closed-loop control of the secondary components, this technology can realize the system power matching, reduce the throttling loss, recover and reuse the swing braking energy, and effectively improves the energy efficiency and control characteristics of the hydraulic swing system [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Dual Source Integrated Driving for Hydraulic Excavator Swing System

Huang¹,

Zhang

et al. 2021

IEEE Access

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Generally, during the accelerating process of construction machinery large inertia hydraulic swing system, a lot of kinetic energy is accumulated, and it will be eventually dissipated through the relief valve orifice during the decelerating process, which results in serious energy waste and large overflow loss. In order to solve this problem, a new dual source hydraulic motor with non-uniform flow distribution is proposed, which can drive high-frequency swing mechanism efficiently. The new dual source hydraulic motor has two groups of oil inlet and outlet, corresponding to two groups of different displacement. The two groups of inlet and outlet are respectively connected with the energy recovery unit and the main driving unit. During the starting process, the energy recovery unit assists the main driving unit to drive the swing mechanism together, so that the main drive unit output torque and overflow loss are reduced; during the braking process, the energy recovery unit recovers the braking energy. Finally, the integrated control of braking energy direct recovery and utilization is realized. In the research, the 38 t hydraulic excavator is taken as the research object. Firstly, the multi-body dynamics electro-hydraulic simulation model of the dual source integrated driving hydraulic excavator swing system is established, and the accuracy of the model is verified by experiments. Then the effects of the accumulator working pressure and the dual source hydraulic motor displacement ratio on the working performance of the system were simulated. The simulation results show that with the displacement ratio increasing, the accelerating time, the maximum angular velocity and decelerating time increase. Compared with the original system, when the displacement ratio  is 0.6, the comprehensive performance of the system is the best, and the hydraulic pump output energy is reduced by 48.6% and 46.6% respectively in the process of full load and no-load operation.

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“…And the energy recovery system (ERS) is usually used to regenerate the potential energy when the load is down or the kinetic energy when the actuator is braking. 13,14 In the above researches, although the energy loss is reduced to some extent, the overflow loss through the relief valve is still existing. In the hydraulic systems, relief valves are critical and the energy loss through them is considerable; however, there are few researches on them.…”

Section: Introductionmentioning

confidence: 99%

Influence of the energy regeneration unit on pressure characteristics for a proportional relief valve

Lin

Chen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part I:

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Overflow loss through the relief valves is universal in hydraulic systems. To explore the feasibility to regenerate the overflow loss, an energy regeneration unit is connected to the outlet of the proportional pilot relief valve which can reduce the pressure difference and the overflow loss accordingly. The added energy regeneration unit may affect the performance of the proportional pilot relief valve. The mathematical model of the proportional pilot relief valve with the energy regeneration unit is established. And AMESim is employed to develop the simulation model of the proportional pilot relief valve to obtain the characteristics of the proportional pilot relief valve which is affected by the energy regeneration unit. The experiment is carried out to test the influence of the energy regeneration unit on the performance of the proportional pilot relief valve. The experimental results show that the inlet pressure of the proportional pilot relief valve decreases gradually with the increase in back pressure of the energy regeneration unit. The maximum pressure drop of the inlet pressure of the proportional pilot relief valve is about 0.63 MPa. Compared to the fluctuation caused by the flow rate, which is 10%–30%, the fluctuation caused by the energy regeneration unit is only 2.8% and can be neglected. This indicates that the feasibility and effectiveness to regenerate the overflow loss of the proportional pilot relief valve through connecting an energy regeneration unit to the outlet of the proportional pilot relief valve.

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Research on energy regeneration and effect of dynamic characteristics of secondary control swing for hydraulic excavator system

Cited by 7 publications

References 13 publications

Developments in energy regeneration technologies for hydraulic excavators: A review

Developments in energy regeneration technologies for hydraulic excavators: A review

Dual Source Integrated Driving for Hydraulic Excavator Swing System

Influence of the energy regeneration unit on pressure characteristics for a proportional relief valve

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