A study of the operation of a gear pump on highly viscous polymer solutions

Kozlov, Yu. N.; Polyakov, Yu. N.; Kozlova, G. I.; Medvedev, V. D.; Faidel, G.I.

doi:10.1007/bf01162839

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Viscosity of the hydraulic fluids can play a major role in determining how efficient the pump will perform for a given hydraulic fluid. 3 In fact, viscosity of a hydraulic fluid is a major selection criterion for pump performance. Figure 1 schematically shows the relationship between hydraulic pump fluid viscosity and pump operating conditions and related failure modes.…”

Section: Introductionmentioning

confidence: 99%

“…These definitions show that the physicochemical state of the fluid running through a pump is just as important to the efficiency as the physical design of the pump. Viscosity of the hydraulic fluids can play a major role in determining how efficient the pump will perform for a given hydraulic fluid . In fact, viscosity of a hydraulic fluid is a major selection criterion for pump performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Graphite and Carbon Nanofiber Additives on the Performance Efficiency of a Gear Pump Driven Hydraulic Circuit Using Ethanol

Martorana¹,

Bayer²,

Steele³

et al. 2010

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

We show that fine graphite flake and carbon nanofiber dispersed ethanol solutions can potentially replace conventional hydraulic fluids in gear pump-driven hydraulic circuits operating below 1 MPa gauge pressure. Low-viscosity hydraulic fluids are generally detrimental to pump life. However, both graphite and carbon nanofiber dispersions in ethanol within a concentration range of 195-1500 ppm can sustain hydraulic circuits with increases in pump efficiency and without modifying the viscosity of ethanol. Pump inlet pressure, volumetric flow rate, and electric power consumption data were recorded over a range of pump discharge pressures. Pump power consumption at a given differential pump pressure was found to remain approximately constant for all suspensions. However, increases in both volumetric flow rate and overall pump efficiency were observed when pure ethanol was replaced by the nanostructured carbon/ethanol solutions. The presence of the additives can partially or collectively improve a number of lubrication mechanisms which exist in a gear pump such as boundary, hydrodynamic, hydrostatic, elastohydrodynamic, and mixed-film lubrication. Additionally, we observed that the additives deposited permanently on gear and enclosure surfaces creating low shear strength films which can help reduce friction. Qualitative examination of environmental scanning electron microscope images of colloidal graphite and carbon nanofiber additive morphology before and after extended run periods indicated that graphite retained significant resilience, whereas carbon nanofibers appear to have undergone some scission.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%