Energy-saving improvement and simulation study on digital hydraulic system

Song, Fei; Lou, Jingjun; Peng, Likun

doi:10.1109/icamechs.2015.7287080

Cited by 4 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heitzig et al 15 analyzed a digital pump consisting of several parallel constant pumps and several switching valves, which proved that the digital pump has more advantages in energy-saving than the traditional pump control system under partial load conditions of the multiactuator systems. Song et al 16 designed a new load-sensing digital hydraulic system using pressure compensation technology and frequency conversion hydraulic technology. The system could adjust the oil supply pressure and the oil supply flow in real-time according to the change of the load pressure and the load flow, minimizing the throttling loss and the overflow loss, and improving the system efficiency.…”

Section: Introductionmentioning

confidence: 99%

Digital Control Method and Performance Analysis of the Double-Compound Axial Piston Pump

et al. 2023

View full text Add to dashboard Cite

The flow control range of the double-compound axial piston pump with the traditional mechanical-hydraulic feedback servo control is limited and the accuracy is poor. Accordingly, this paper proposes a digital control scheme and its control strategy using a linear stepper motor direct drive servo valve for the precise control and double pumps cooperation of the double-compound axial piston pump. A numerical model of the digital control double-compound axial piston pump is established, and the validity of the model is verified by experimental tests. The performance advantages of the digital control method relative to the mechanical-hydraulic feedback servo control method are analyzed, as is the performance of the control strategy for double pumps. The results show that the digital control method can achieve a wider range of flow control than the traditional mechanical-hydraulic feedback servo control method and avoid the torque impact on the prime mover caused by the active control. The combination of the flow control and the power control including four control modes can meet the performance requirements of the double-compound axial piston pump. The highest priority is given to the energy-saving control, which can reduce the displacement of the main pump in the nonworking state to reduce the additional power loss. The study provides a basis for the accurate matching and optimization of power to load and flow to operating speed of the double-compound axial piston pump.

show abstract

Section: Introductionmentioning

confidence: 99%

Digital Control Method and Performance Analysis of the Double-Compound Axial Piston Pump

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Compared with traditional hydraulic variable control technology, the digital hydraulic system has the advantages of low cost, high response, easy control, high efficiency, and high reliability [4][5][6]. In recent years, it has been of wide interest to the hydraulic industry [7,8], and has gradually began to be applied to large equipment such as loaders [9] and excavators [10,11].The parallel digital hydraulic technology uses the logical combination of hydraulic components to control, which has lower requirements for system hardware, better energy saving effect, and higher reliability. Linjama et al [12] carried out the digital transformation on the hydraulic system of a wheel excavator working device, compared with the original load sensing system with the digital valve control hydraulic cylinder system of inlet and outlet regulation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Multi-Way Valve Structure in Digital Hydraulic System of Loader

Liu

Wang

et al. 2021

Energies

View full text Add to dashboard Cite

In this paper, a digital hydraulic variable control method based on multi-way valve spool displacement feedback is proposed, which combines the advantages of low cost and high reliability of the loader fixed displacement pump hydraulic system, and the distinguished energy saving effect of the loader variable pump hydraulic system. Based on the principle of hydraulic resistance, the mathematical model of flow-pressure of multi-way valve was established. Meanwhile, the theoretical structure of a valve spool suitable for digital hydraulic system was deduced. On this basis, an improvement scheme of the valve spool was proposed in combination with machining feasibility. The simulation model of multi-way valve was established, the correctness of which was verified by experiment with the significance test method, and the valve port parameters of the multi-way valve were optimized by genetic algorithm. The simulation model before and after optimization was analyzed by AMESim software. The simulation results showed that the digital hydraulic system can basically realize the function of a variable system, and the energy consumption was significantly reduced compared with the fixed displacement pump hydraulic system. The optimized valve spool structure of the digital hydraulic system had more stable load characteristics than the fixed displacement pump system and a larger speed range. The increase range accounts for about 27% of the total stroke.

show abstract

The Concept of an Energy-Efficient, Modular Hydraulic Device that Increases Work Safety and Reduces Labor Intensity in the Construction of Large-Scale Structures in Field Conditions

Żuczek,

Rząsiński

2023

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Energy-saving improvement and simulation study on digital hydraulic system

Cited by 4 publications

References 6 publications

Digital Control Method and Performance Analysis of the Double-Compound Axial Piston Pump

Digital Control Method and Performance Analysis of the Double-Compound Axial Piston Pump

Optimization of Multi-Way Valve Structure in Digital Hydraulic System of Loader

The Concept of an Energy-Efficient, Modular Hydraulic Device that Increases Work Safety and Reduces Labor Intensity in the Construction of Large-Scale Structures in Field Conditions

Contact Info

Product

Resources

About