Nonuniform delivery rates from multicylinder pumps

Shcherba, V. Е.; Bolshtyanskii, A. P.; Kaigorodov, S. Yu.; Kuzeeva, D. A.

doi:10.3103/s1068798x1604016x

Cited by 5 publications

(1 citation statement)

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“…Moreover, flow pulsation rate is used to characterize the degree of flow pulsation, 21 and the smaller flow pulsation rate is, the more stable discharge flow is. The flow pulsation rate can be described as:…”

Section: Analysis Of Discharge Flow Characteristicsmentioning

confidence: 99%

Dynamic characteristics analysis of long stroke reciprocating pump combined crank-linkage with rack-pinion mechanism

Huang

Hou

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Drilling pump is the heart of drilling rig, its core structure is crank-linkage mechanism. However, the drilling pump is criticized for its short stroke and high stroke frequency. Aiming at these defects, a long stroke reciprocating (LSR) pump combined the crank-linkage with a rack-pinion mechanism is proposed, and its dynamic and flow characteristics are researched. The results reveal that the stroke of the LSR pump is extended twice when the crank radius stays the same. The stroke frequency and flow pulsation rate are lowered under the same rated power. A new multi-fulcrum crankshaft is designed to extend its fatigue life, and the reaction forces of each fulcrum are solved by simulation. The influence of the fulcrums position on the crankshaft modal frequency is further investigated. The flexible characteristics of the multi-fulcrum crankshaft are studied by rigid-flexible coupled analysis. The results show that more fulcrums can effectively reduce the stress of crankshaft, and the maximum stress of the multi-fulcrum crankshaft is only 178.6 MPa. The modal frequency of the multi-fulcrum crankshaft is increased due to more fulcrums, which proved its stiffness and stability are improved. The fatigue life of the multi-fulcrum crankshaft is predicted to reach 30,000 h by finite element analysis. This study would provide a theoretical basis for further development of the LSR pump.

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Section: Analysis Of Discharge Flow Characteristicsmentioning

confidence: 99%

Dynamic characteristics analysis of long stroke reciprocating pump combined crank-linkage with rack-pinion mechanism

Huang

Hou

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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An Analysis of the Cooling Intensity Effect of a Two-Cylinder Single-Stage Piston Hybrid Power Machine with Fluid Flow Due to Vacuum at Suction on the Working Processes and Indicative Efficiency

et al. 2020

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In this paper, a new promising scheme of a two-cylinder single-stage piston hybrid power machine with fluid flow due to vacuum at suction is examined. A prototype is developed, and an experimental stand is created. An analysis of the influence of the coolant flow on the working processes of the machine is carried out theoretically and experimentally. The results obtained show that an increase in the coolant consumption leads to a decrease in the input technical work in the process of compression, an increase in the output technical work in the process of decompression, a reduction of the work losses in the process of discharge and an increase of the work losses in the process of suction. Based on the conducted experimental studies it is established that the optimal indicative value of the efficiency for the experimental machine under study is in the range of 300 – 400 ml/min and the relative increase in the indicative efficiency is within 7 %.

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An Analysis of Various Cooling Liquids in a Two-Cylinder Single-Stage Piston Hybrid Power Machine with Fluid Flow Due to Vacuum at Suction Based on Experimental Results

et al. 2020

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This paper examines the use of various types of cooling liquids in a two-cylinder single-stage piston hybrid power machine with fluid flow due to vacuum at suction. Liquids with various basic thermal properties were used as working fluids: distilled water, antifreeze, and transmission oil. Specific heat capacities and dynamic viscosities of these liquids differed from 2 to 10 times. The experimental studies showed that the greatest cooling effect on the cylinder-piston group was observed when using distilled water, and the least — when using transmission oil. The average surface temperature of the working chamber when cooled with water was minimal in the range of 330–340 K. The average surface temperature of the working chamber when cooled with transmission oil was maximum and ranged from 345 to 355 K, i. e. it was about 15 K higher than when cooled with water. The average surface temperature of the working chamber when cooled with antifreeze occupied an intermediate position between the average temperatures of the working chamber when cooled with water and that with transmission oil and was in the range of 335–345 K, i. e. about 5 K higher than when cooled with water.

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Nonuniform delivery rates from multicylinder pumps

Cited by 5 publications

References 0 publications

Dynamic characteristics analysis of long stroke reciprocating pump combined crank-linkage with rack-pinion mechanism

Dynamic characteristics analysis of long stroke reciprocating pump combined crank-linkage with rack-pinion mechanism

An Analysis of the Cooling Intensity Effect of a Two-Cylinder Single-Stage Piston Hybrid Power Machine with Fluid Flow Due to Vacuum at Suction on the Working Processes and Indicative Efficiency

An Analysis of Various Cooling Liquids in a Two-Cylinder Single-Stage Piston Hybrid Power Machine with Fluid Flow Due to Vacuum at Suction Based on Experimental Results

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