Modern water hydraulics—the new energy-transmission technology in fluid power

Lim, G.H.; Chua, Patrick S. K.; He, Yi

doi:10.1016/s0306-2619(03)00064-3

Cited by 79 publications

(47 citation statements)

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“…Hydrocarbons differ in their susceptibility to microbial attack. Williams and Janney in 1906 put forward the idea of replacing water-based fluid by oil, thus avoiding corrosion, lubrication and freezing as well as leakage problems, at high temperature, involving water (Lim et al, 2003). Petroleum oil in comparison with water as hydraulic fluid has the advantage of inhibiting the development of rust of the ferrous components of the mechanical equipment utilized and in preventing wear and tear of the machinery since the hydraulic fluid must lubricate the equipment.…”

Section: Introductionmentioning

confidence: 99%

Microbial growth in brake fluids

Maduka

Okpokwasili

2016

International Biodeterioration & Biodegradation

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Section: Introductionmentioning

confidence: 99%

Microbial growth in brake fluids

Maduka

Okpokwasili

2016

International Biodeterioration & Biodegradation

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“…As a result, the selection of materials satisfying the tribological requirements of seawater hydraulic components is a rather tough problem. [4][5][6] Polyetheretherketone (PEEK) belongs to semicrystalline thermoplastic polymers with high performance of thermal and chemical stability, accompanied with low density, high strength, and excellent wear and corrosion resistance, which is widely used in extremely harsh environment where poor or no lubrication is available. Many scholars have made great efforts to develop PEEK-based composites in order to achieve more excellent mechanical and tribological performance.…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviors of carbon fiber reinforced polyetheretherketone sliding against silicon carbide ceramic under seawater lubrication

Zhang

Nie

Liao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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Tribological behaviors of carbon fiber reinforced polyetheretherketone (CFR PEEK) sliding against silicon carbide ceramic under seawater lubrication were investigated. The effects of sliding velocity (from 0.5 to 1.5 m/s) and contact pressure (between 0.66 and 2.64 MPa) on friction coefficient and wear rate have been obtained through a surface contacted tribotester. The results reveal that the friction pair possesses outstanding friction and wear resistances under seawater lubrication, and there exists an evident running-in process. When contact pressure is beyond 1.32 MPa, the friction coefficient of the friction pair is totally less than 0.1, and it firstly decreases and then fluctuates slightly with the increase of sliding velocity. Friction coefficient shows a downward trend with the increase of contact pressure when the sliding speed keeps between 0.75 and 1.5 m/s. The wear rate of CFR PEEK decreases slightly with the increase of contact pressure, whereas the mass loss of silicon carbide ceramic is negligible. The tribological mechanism of friction pair was analyzed through the micro-morphology of worn surfaces obtained by optical microscope and scanning electron microscope. The main tribological mechanisms of CFR PEEK are adhesive wear and mechanical ploughing caused by surface micro-peaks of silicon carbide ceramic. The research will lay foundation for materials screening of key friction pairs in seawater hydraulic components.

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“…Past two decades, in order to meet the demand of economic development and environmental protection, pure water hydraulic systems has been applied in food industry, steel mills, nuclear engineering, and desalination plants because pure water is environmentally friendly, non-toxic, non-flammable and cost-effective (Lim et al, 2003;Conrad, 2005). Ceramic materials are thought of the suitable materials in the water hydraulic systems.…”

Section: Introductionmentioning

confidence: 99%

On frictional performance of sintering materials used by mechanical seals in water

Liu

Zhao²,

Wen³

et al. 2014

Industrial Lubrication and Tribology

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Purpose -It is aiming at finding tribology performance laws and mechanism of sintering materials, including new materials, which are popular or potential materials of mechanical seals working under water condition with different working parameters, involving load and sliding speed. Design/methodology/approach -Falex-1506 tribo-machine has been used. The upper sample is rotated against the stationary sample below. They are all rings. The samples are WNV2, sintered pressureless bonded; CHV1, graphite-added PLSiC; R, sintered reaction bonded; R2, graphite-added RBSiC, cemented carbide YN6 and graphite MSMG. Twenty kinds of hard/hard and soft/hard pairs were tested under water condition. Then, SEM was used to observe the sliding surface to explain their rubbing mechanism. Findings -Friction coefficients decrease with the load increasing under water lubrication due to water holding by small holes on their surface. But the friction coefficients have no change with the varying of velocity. The hard alloy/sintered silicon carbon pairs may be better choice, where the lowest friction coefficient is only about 0.02, than soft/hard or silicon carbon/silicon carbon pairs under water lubrication, especially under heavy load.Research limitations/implications -The test was carried under load from 89 N (0.7 MPa) to 356 N (2.80 MPa) and sliding velocity from 0.746 to 5.074 m/s where the lubrication is in mixed. Originality/value -The detailed values of frictional coefficients of popular and potential sintered material of mechanical seals working under water lubrication were given by the experimental research which may be helpful for the choice of mechanical seal materials.

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Modern water hydraulics—the new energy-transmission technology in fluid power

Cited by 79 publications

References 1 publication

Microbial growth in brake fluids

Microbial growth in brake fluids

Tribological behaviors of carbon fiber reinforced polyetheretherketone sliding against silicon carbide ceramic under seawater lubrication

On frictional performance of sintering materials used by mechanical seals in water

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