Research on Self-balancing Control of the High Water-Based Hydraulic Motor’s Swiveling Shaft Friction Pair Based on CFD

2020 ◽  
pp. 817-827
Author(s):  
Wenjie Zhu ◽  
Xinbin Zhang ◽  
Jiyun Zhao ◽  
Jinlin Jiang ◽  
Wenyong Dong
Keyword(s):  
Friction Pair ◽  
High Water ◽  
Water Based ◽  
Balancing Control ◽  
Shaft Friction

scholarly journals Study the Influence of Surface Morphology and Lubrication Pressure on Tribological Behavior of 316L–PTFE Friction Interface in High-Water-Based Fluid

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 405
Author(s):  
Jiaxiang Man ◽  
Jiyun Zhao ◽  
Liangchen Song ◽  
Haifeng Yang
Keyword(s):  
Surface Morphology ◽  
Normal Load ◽  
Friction Pair ◽  
Experimental System ◽  
High Water ◽  
Hydraulic Motor ◽  
Stainless Steel 316L ◽  
Lubrication Film ◽  
Low Viscosity ◽  
Water Based

Because of the low viscosity of high-water-based fluids, the intense wear and leakage of key friction pairs represent a bottleneck to the wide application of the high-water-based hydraulic motor in engineering machinery. In this work, based on the common characteristics of plane friction pairs, the friction experiments of a 316L stainless steel (316L)–polytetrafluoroethylene (PTFE) friction pair under various working condition were carried out by a self-designed friction experimental system with fluid lubrication. The influence of lubrication pressure and surface morphology on the 316L–PTFE friction pair was investigated both experimentally and theoretically. The experimental and numerical results indicated that increasing lubrication pressure reduced the surface wear of PTFE sample, but the leakage of 316L–PTFE friction pair also increased. It could not form an effective fluid lubrication film in the 316L–PTFE friction pair under low lubrication pressure, which caused the severe wear in friction pair interface. The smooth 316L surface could be conducive to the formation of high-water-based fluid lubrication film in 316L–PTFE friction interface. The pressure distribution of high-water-based fluid lubrication film in 316L–PTFE friction pair was also obtained in fluent. The PTFE surface was easily worn when the lubrication film in the friction pair was too thin or uneven. The friction and wear were obviously improved when the normal load was balanced by the bearing capacity of the high-water-based fluid lubrication film.

Minimization of contact pressure for hub–shaft friction pair

2015 ◽  
Vol 36 (5) ◽  
pp. 404-408 ◽  
Author(s):  
V. M. Mirsalimov ◽  
P. E. Akhundova
Keyword(s):  
Contact Pressure ◽  
Friction Pair ◽  
Shaft Friction

scholarly journals Ultralow-temperature-driven water-based sorption refrigeration enabled by low-cost zeolite-like porous aluminophosphate

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhangli Liu ◽  
Jiaxing Xu ◽  
Min Xu ◽  
Caifeng Huang ◽  
Ruzhu Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Water Sorption ◽  
High Performance ◽  
Global Climate ◽  
Low Cost ◽  
Cost Effective ◽  
High Water ◽  
Coefficient Of Performance ◽  
High Efficient ◽  
Water Based

AbstractThermally driven water-based sorption refrigeration is considered a promising strategy to realize near-zero-carbon cooling applications by addressing the urgent global climate challenge caused by conventional chlorofluorocarbon (CFC) refrigerants. However, developing cost-effective and high-performance water-sorption porous materials driven by low-temperature thermal energy is still a significant challenge. Here, we propose a zeolite-like aluminophosphate with SFO topology (EMM-8) for water-sorption-driven refrigeration. The EMM-8 is characterized by 12-membered ring channels with large accessible pore volume and exhibits high water uptake of 0.28 g·g−1 at P/P0 = 0.2, low-temperature regeneration of 65 °C, fast adsorption kinetics, remarkable hydrothermal stability, and scalable fabrication. Importantly, the water-sorption-based chiller with EMM-8 shows the potential of achieving a record coefficient of performance (COP) of 0.85 at an ultralow-driven temperature of 63 °C. The working performance makes EMM-8 a practical alternative to realize high-efficient ultra-low-temperature-driven refrigeration.

Effect of Mineral Filler Compounds on Vapor Permeability and Hygroscopic Properties of Water-Based Polymer Dispersions

2019 ◽  
Vol 968 ◽  
pp. 89-95 ◽  
Author(s):  
Natalia Vyacheslavovna Saienko ◽  
Dmitriy Vasilevich Demidov ◽  
Yuri Viktorovich Popov ◽  
Roman Aleksandrovich Bikov ◽  
Basheer Younis ◽  
...  
Keyword(s):  
High Water ◽  
Vapor Permeability ◽  
Mineral Filler ◽  
Protective Material ◽  
Pairwise Correlation ◽  
Hygroscopic Properties ◽  
Water Vapour Diffusion ◽  
Water Based ◽  
Protection Theory ◽  
Polymer Dispersions

The effect of mineral filler compounds on vapor permeability and hygroscopic properties of water-based polymer dispersions and the possibility of their use as decorative and protective material for stucco facades finishing was studied. According to Facade Protection Theory (H.M. Künzel), the assessment criterion was vapor permeability and water vapor diffusivity. The pairwise correlation of building physical properties of water-based polymer dispersions in the coordinates of Künzel's diagram clearly demonstrates that, in terms of hygroscopic, all the samples studied correspond to the low hygroscopic class, and in terms of vapor, they are close to high water vapour diffusion rate class.

Colorimetric and ratiometric fluorescence sensing of water based on 9-methyl pyrido[3,4-b]indole-boron trifluoride complex

2019 ◽  
Vol 48 (6) ◽  
pp. 2086-2092 ◽  
Author(s):  
Toshiaki Enoki ◽  
Yousuke Ooyama
Keyword(s):  
Water Content ◽  
Boron Trifluoride ◽  
Fluorescent Sensor ◽  
High Water ◽  
High Water Content ◽  
Ratiometric Fluorescence ◽  
Fluorescence Sensing ◽  
Water Based ◽  
Ratiometric Fluorescence Sensing ◽  
Boron Trifluoride Complex

9-Methyl pyrido[3,4-b]indole-boron trifluoride complex 9-MP-BF3 was developed as a colorimetric and ratiometric fluorescent sensor for the detection of water from the low- to high-water-content regions in solvents.

scholarly journals High-Efficiency Glass and Printable Flexible Dye-Sensitized Solar Cells with Water-Based Electrolytes

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Omar Moudam ◽  
Silvia Villarroya-Lidon
Keyword(s):  
High Efficiency ◽  
Positive Impact ◽  
Pure Water ◽  
Dye Sensitized Solar Cells ◽  
Solar Spectrum ◽  
Electrolyte Solutions ◽  
High Water ◽  
High Water Content ◽  
Dye Sensitized ◽  
Water Based

The performance of a flexible and glass dye-sensitized solar cell (DSSC) with water-based electrolyte solutions is described. High concentrations of alkylamidazoliums were used to overcome the deleterious effect of water and, based on this variable, pure water-based electrolyte DSSCs were tested displaying the highest recorded efficiency so far of 3.45% and 6% for flexible and glass cells, respectively, under a simulated air mass 1.5 solar spectrum illumination at 100 mWcm−2. An improvement in the Jsc with high water content and the positive impact of GuSCN on the enhancement of the performance of pure water-based electrolytes were also observed.

scholarly journals Tribological Properties of ZrO2 Coating on the Ball Joint of an Axial Piston Pump in High Water-Based Emulsion Medium

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Baofu Kou ◽  
Zhenshun Li ◽  
Zhang Zhang ◽  
Ruiqing Li
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
High Water ◽  
Wear Loss ◽  
Ball Joint ◽  
Zro2 Coating ◽  
Ceramic Ball ◽  
Water Based ◽  
Axial Piston ◽  
Emulsion Concentration

This paper studies the tribological properties of the ZrO2-coated spherical joint pair of the axial piston pump in a high water-based emulsion medium. Firstly, atmospheric plasma spraying was used to prepare the ZrO2 coating on the surface of the spherical joint pair. Secondly, the tribological characteristics of the steel-steel pair and ceramic-ceramic pair were analyzed by the friction and wear testing machine under the conditions of a high water-based emulsion concentration, load size, and load frequency. White light interference three-dimensional surface profiler and scanning electron microscope were used to analyze the original and worn surfaces of the samples, and then the friction and wear of the different material pairs were discussed. The results show that the friction reduction and wear resistance of the ceramic ball joint are superior to those of the steel ball joint. When the load is 100 N, the frequency is 1 Hz, and the emulsion concentration is 5%, and the friction coefficient and wear loss of the ceramic-ceramic ball joint pair are the lowest. The emulsion concentration and load have great influence on the friction coefficient and wear amount, while the frequency has little influence on them. With increasing concentration of the emulsion, the friction coefficient decreases and tends to be stable, but with increasing of load, the friction coefficient and wear increase. The friction coefficient and wear loss of the ceramic-ceramic ball joint in pure water are 0.25 times higher than those of the steel ball joint under the same working conditions. Therefore, when the concentration of the high water-based emulsion is 5%, 100 N load, 1 Hz frequency, the ceramic-ceramic ball joints display the best friction and wear resistance of the two. The research results provide a theoretical basis for the design, manufacture, and application of the ceramic coating hydraulic components in a high water-based emulsion medium.

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