Characteristics of the stationary behaviour of water- and oil-based power-control hydraulics

Majdič, Franc; Kalin, Mitjan

doi:10.5755/j01.mech.20.3.5301

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Because of the smaller volume, lightweight, and compact structure, the hydraulic power technology is widely used in marine mechatronic equipment, 1,2 such as submersible hydraulic buoyancy control and manipulator. [3][4][5] However, traditional hydraulic drive technology takes mineral oil as a working medium, which is also named oil hydraulic drive technology. For underwater applications, due to the incompatibility between the working medium (mineral oil) and its working environment (seawater), oil hydraulic drive technology has serious disadvantages, such as complex system structure (many oil inlet and return pipelines exist in the actuator), vast volume, heaviness (oil tank, working medium and pressure compensator), low power density, unreliable operation, short service life (seawater can easily invade the system, making the working medium deteriorate, exacerbating wear between the relative moving parts, reducing reliability, and service life), high maintenance costs (working medium must often be modified and waste liquid must be treated), poor mobility, and flexibility.…”

Section: Introductionmentioning

confidence: 99%

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Research on Seawater Hydraulic Internal Ball Gear Pump

Yang

ZHANG

Yankeya

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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With high demands for novel technologies in the marine mechatronic instrumentality and the limitations of the present hydraulic pumps, a novel bidirectional seawater hydraulic internal ball gear pump is proposed to accomplish the function of fluid power transmission and control. The proposed hydraulic pump can be used for hydraulic buoyancy control systems of underwater vehicles and different marine mechatronic equipment. In this paper, the model, the meshing and the flow characteristics of the internal ball gear pump are developed. The radial unbalance force of the pump, leakage, and flow pulsation are also analyzed. The new type of eccentric shaft-hole rotary sealing designed in this paper can eliminate axial leakage and is expected to improve volumetric efficiency, working pressure and power density. Simulation and experimental results show that: (1) by using the concave/convex ball gears rather than the existing gears, the concave ball gear drives the convex ball ring to rotate, realizing energy transfer and conversion; (2) compared with the water hydraulic internal gear pump, the internal ball gear pump has excellent performance. Experimental results also show that when the speed is 1500rpm, the maximum operating pressure can reach 7MPa. At 2MPa, its volumetric efficiency and flow can reach 75% and 0.189L/min, respectively. The outcomes of this study show that the proposed seawater hydraulic internal ball gear pump is effective and has a lot of potential.

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Section: Introductionmentioning

confidence: 99%

“…(2) Good mechanical properties, good impact resistance, good thermal stability, and good processing properties. (3) The key friction pair has good self-lubricating performance and wear resistance. (4) Green and environmental protection, easy to obtain and reasonably price.…”

Section: Introductionmentioning

confidence: 99%

Research on Seawater Hydraulic Internal Ball Gear Pump

Yang

ZHANG

Yankeya

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…3 Nevertheless, water has poor lubricity and bearing capacity as well as strong corrosion and cavitation ability, 4,5 which cause significant restrictions on the use of traditional tribopairs under water lubrication. 6,7 Consequently, anti-friction/anti-wear tribopairs are catching increasing attention worldwide. 8 Rubber materials with excellent sealing and friction properties are widely used for water lubrication conditions.…”

Section: Introductionmentioning

confidence: 99%

Screening of low friction coefficient tribopairs of different rubber with various steels and ceramics under water lubrication

Min

Tang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Water is a transmission medium with broad application prospects. In order to screen some excellent tribopairs under water lubrication, the friction behaviors of NBR, HNBR, and EPDM sliding against 11 kinds of counterpart materials including stainless steels and ceramics were investigated. The friction experiments were carried out under different rotation speeds. SEM images of partial tribopairs were exhibited to discuss the reasons for the differences in their friction behaviors. The results indicate that when sliding against different rubber materials under various rotation speeds, 17-4PH regularly has the lowest friction coefficient and the worn surfaces of corresponding rubber material are flat. In contrast, Cr2O3-related materials always have the worst friction performances and the corresponding rubber material surfaces are seriously worn. 17-4PH and 2507 exhibit similar tribological properties, and the tribological properties of the four WC-based materials also resemble highly, which can be inferred from the micro surface morphologies of their corresponding rubber materials. Moreover, the tribological properties of NBR are most affected by the experimental conditions. The tribological performances of HNBR are prior to those of NBR. EPDM has enhanced tribological properties with the increase of rotation speed.

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Energy and exergy analysis of a novel pumped hydro compressed air energy storage system

Yang,

Li,

et al. 2024

Energy

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Characteristics of the stationary behaviour of water- and oil-based power-control hydraulics

Cited by 7 publications

References 5 publications

Research on Seawater Hydraulic Internal Ball Gear Pump

Research on Seawater Hydraulic Internal Ball Gear Pump

Screening of low friction coefficient tribopairs of different rubber with various steels and ceramics under water lubrication

Energy and exergy analysis of a novel pumped hydro compressed air energy storage system

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