Analysis and development of the hydraulic secondary regulation system based on the CPR

Shen, Wei; Jiang, Jihai

doi:10.1109/fpm.2011.6045741

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…The accumulator is used for twin purposes, storing the recovered energy and generating system pressure as per the demand. 88–90 The stated control principle is known as Secondary Control . Previously many researchers used the same technique for evaluating the mobile hydraulic systems.…”

Section: Different Strategies Of Energy Savingsmentioning

confidence: 99%

Energy-saving strategies on power hydraulic system: An overview

Mahato

Ghoshal

2020

Proceedings of the Institution of Mechanical Engineers, Part I:

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Different strategies for improving the energy efficiency of a power hydraulic system have been reviewed in this article. The energy-saving scheme is classified into three categories: S ystem design, Improving components or product functions and Loss reduction. The sub-categories of energy-saving strategies are discussed briefly. Also, different energy-saving potentials of power hydraulic system are presented in tabular form for clear understanding on the chronological development toward energy-efficient fluid power system.

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Section: Different Strategies Of Energy Savingsmentioning

confidence: 99%

Energy-saving strategies on power hydraulic system: An overview

Mahato

Ghoshal

2020

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…Accordingly, the maximum energy density based on the optimum pressure ratio can be represented in the form r = n n 1−n (11) On the other hand, the HA works frequently in the process of charging and releasing. To prolong the service life of the HA, the peak volume change of the air bladder of the HA cannot be too large.…”

Section: Working Pressure Of the Hamentioning

confidence: 99%

“…Pressure sensors 10,11,19, and 20 are used to gain the pressures of the pump, the inlet and outlet of the PRV and the HA. These pressures are used to determine the energy recovery process.…”

Section: Control Flowmentioning

confidence: 99%

Energy Regeneration Hydraulic System via a Relief Valve with Energy Regeneration Unit

et al. 2017

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Featured Application: This research aims to reduce the energy loss through the relief valve, especially in the systems where the system pressure is high or the overflow flow rate is large.Abstract: Relief valves are widely used in industrial machinery. Due to the outlet of the relief valve being connected to the tank, the pressure drop of the relief valve is frequently equal to the inlet pressure. Accordingly, the energy loss of the relief valve is very high in some cases and this will worsen with an increase in the rated pressure of the hydraulic system. In order to overcome the disadvantage of overflow energy loss in a relief valve, a hydraulic energy regeneration unit (HERU) is connected to the outlet of the relief valve to decrease the pressure drop between the inlet and outlet of the relief valve. The overflow loss, which is characterized by the pressure drop, can be reduced accordingly. The approach is to convert the overflow energy loss in hydraulic form and allow for release when needed. The configuration and working principle of the relief valve with HERU is introduced in this present study. The mathematical model is established to obtain the factors influencing the stability of the relief valve. The working pressure of the hydraulic accumulator (HA) is explored. Furthermore, the control process of the operating state of the HA is scheduled to decide whether to regenerate the energy via the HERU. The software AMESim is utilized to analyze the performance and characteristics of the relief valve with HERU. Following this, the test rig is built and used to verify the effectiveness of the proposed relief valve with HERU. The experimental results show that the relief valve with the HERU connected to its outlet can still achieve better pressure-regulating characteristics. The energy regeneration efficiency saved by the HA is up to 83.6%, with a higher pre-charge pressure of the HA. This indicates that the proposed structure of the relief valve with HERU can achieve a better performance and higher regeneration efficiency.

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“…Common pressure rail (CPR) is composed of high pressure pipeline and low pressure pipeline, which is similar to the grid system that is composed of high-voltage line and low-voltage line [27]. Electric equipment is connected to the grid in parallel.…”

Section: Machine Descriptionmentioning

confidence: 99%

Energy‐Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

Shen

Jiang

et al. 2013

The Scientific World Journal

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Energy-saving research of excavators is becoming one hot topic due to the increasing energy crisis and environmental deterioration recently. Hydraulic hybrid excavator based on common pressure rail (HHEC) provides an alternative with electric hybrid excavator because it has high power density and environment friendly and easy to modify based on the existing manufacture process. This paper is focused on the fuel consumption of HHEC and the actuator dynamic response to assure that the new system can save energy without sacrificing performance. Firstly, we introduce the basic principle of HHEC; then, the sizing process is presented; furthermore, the modeling period which combined mathematical analysis and experiment identification is listed. Finally, simulation results show that HHEC has a fast dynamic response which can be accepted in engineering and the fuel consumption can be reduced 21% to compare the original LS excavator and even 32% after adopting another smaller engine.

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Analysis and development of the hydraulic secondary regulation system based on the CPR

Cited by 12 publications

References 16 publications

Energy-saving strategies on power hydraulic system: An overview

Energy-saving strategies on power hydraulic system: An overview

Energy Regeneration Hydraulic System via a Relief Valve with Energy Regeneration Unit

Energy‐Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

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