Energy recovery and utilization system of excavator boom based on flow regeneration and balance theory

Liu, Jinxia; Jiao, Zhiyuan; Xian, Fangxin; Liu, Wenting

doi:10.1007/s40430-019-2124-x

Cited by 10 publications

(12 citation statements)

References 12 publications

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“…and the selfgravity potential energy generated during the boom down is accumulated into hydraulic accumulator (HA) as hydraulic energy via valve 7 [39]. The hydraulic accumulator (HA) is used for storing and releasing energy; accumulator's pressure acting on the boom always shows itself as a balancing weight for the load [43].…”

Section: New Approach For Errs Preventive Maintenancementioning

confidence: 99%

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

et al. 2022

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Although some reliability importance measures and maintenance policies for mechanical products exist in literature, they are rarely investigated with reference to weakest component identification in the design stage and preventive maintenance interval during the life cycle. This paper is mainly study reliability importance measures considering performance and costs (RIMPC) of maintenance and downtime of the mechanical hydraulic system (MHS) for hydraulic excavators (HE) with energy regeneration and recovery system (ERRS) and suggests the scheduled maintenance interval for key components and the system itself based on the reliability R i t . In the research, the required failure data for reliability analysis is collected from maintenance crews and users over three years of a certain type of hydraulic excavators. Minitab is used for probable distribution estimation of the mechanical hydraulic system failure times, and the model is verified to obey Weibull distribution. RIMPC is calculated by multiplying the reliability R i t and weighting factor W i and then compared with other classical importance measures. The purpose of this paper is to identify the weakest component for MHS in the design stage and to make appropriate maintenance strategies which help to maintain a high reliability level for MHS. The proposed method also provides the scientific maintenance suggestion for improving the MHS reliability of the HE reasonably, which is efficient, profitable, and organized.

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Section: New Approach For Errs Preventive Maintenancementioning

confidence: 99%

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

et al. 2022

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“…us, the saved energy can be recycled and reused effectively [29,30]. e energy-saving in the 20-ton HE with ERRS achieves 41.6% during the typical working cycle by simulation analysis done by the other members of our research team [4].…”

Section: Description Of the Utilization System Based On Energy Regeneration And Recoverymentioning

confidence: 99%

“…Machine maintenance is directly related to manufacturing companies' competitive ability in terms of cost, quality, and performance [1][2][3]. Construction equipment is normally sold with a maintenance package or other maintenance services to ensure that the products maintain a high availability level and fulfill the user's needs [4][5][6]. In some enterprises, the software Minitab is applied to do reliability analysis and obtain reliability value based on sophisticated quality data offered by the maintenance crew or the failure information uploaded by the GPS or some realtime monitoring device installed on the machines, which can help to improve reliability of the machine.…”

Section: Introductionmentioning

confidence: 99%

Maintenance Strategy Based on Reliability Analysis and FMEA: A Case Study for Hydraulic Cylinders of Traditional Excavators with ERRS

Zeng

Liu

Wan

et al. 2020

Mathematical Problems in Engineering

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A simple and effective mechanical parts maintenance approach with lower cost is urgently needed by the cost-sensitive manufactures for traditional excavators (HE). This paper proposes maintenance strategy for hydraulic cylinders (HC) of HE with energy regeneration and recovery system (ERRS). Reliability analysis and FMEA of historical failure data are applied to make maintenance strategy. In this study, the failure data required for reliability analysis are collected from the manufacturers and users over two and a half years, Excel is used as statistical tool, Minitab is used for parameter estimation, and Kolmogorov–Smirnov test is used to reject or accept the hypothesis of the distribution model. The reliability parameters R(t), Rset, and R∗(t) are determined and parameter β∗ is the reference value for making countermeasures and maintenance policies properly for the failure modes of the new HC of HE with ERRS. The purpose of this paper is to make proper maintenance policies and to maintain a high availability level and fulfill the user’s needs for HC, which also paves the way for further reliability study about ERRS.

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“…Moreover, the emissions from conventional excavators emit harmful gases into the environment, which cause problems related to air pollution and global warming [4]. Hence, reducing energy consumption is presently an urgent issue for excavators [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Study on a New Independent Metering Valve for Hydraulic Boom Excavator

2022

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Nowadays, hydraulic excavators are an indispensable part of the construction industry; however, conventional hydraulic excavators consume a great deal of fossil fuel and release a large amount of pollution emissions into the environment. This causes many unwanted costs, therefore, effective solutions are required to solve the above-mentioned problems. In this paper, a new independent metering system is proposed to improve energy-saving and reduce costs of a conventional system. In detail, a directional valve is used to control movement and three electro-hydraulic poppet valves are integrated to adjust the flow rate at the inlet and outlet ports of the boom cylinder. In addition, a control strategy based on the coordination between the speed of the pump and the opening area of the spool valve is designed to improve the performance of the system. Specifically, the valves are controlled based on the strategy that the meter-in valve is opened fully to reduce throttling losses and that the meter-out valve is controlled to reduce leakage. The speed of the pump is adjusted according to the feedback position signal. To demonstrate the effectiveness of the new configuration, a real test bench of the boom system was built under laboratory conditions. From the experimental results, the new independent metering valve system not only works with a high tracking precision, but it also reduces energy consumption. Compared with a conventional independent metering system, the fuel economy of the proposed structure can achieve a reduction of approximately 6.5%.

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Energy recovery and utilization system of excavator boom based on flow regeneration and balance theory

Cited by 10 publications

References 12 publications

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

Maintenance Strategy Based on Reliability Analysis and FMEA: A Case Study for Hydraulic Cylinders of Traditional Excavators with ERRS

A Study on a New Independent Metering Valve for Hydraulic Boom Excavator

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