Analysis of the Effect of the Ratio of Discharge Pressure to Suction Pressure on the Characteristics of a Piston Hybrid Power Machine with Gas Suction Capacity

2018 ◽  
Vol 54 (1-2) ◽  
pp. 100-106 ◽  
Author(s):  
V. E. Shcherba ◽  
V. S. Shcherbakov ◽  
N. S. Galdin ◽  
A. V. Grigor’ev ◽  
D. A. Trukhanova
Keyword(s):  
Suction Pressure ◽  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Discharge Pressure ◽  
Gas Suction

An Experimental Study of a Crossheadless Piston Hybrid Power Positive Displacement Machine with Intensive Cooling of the Compressed Gas

2019 ◽  
pp. 78-85
Author(s):  
V.E. Shcherba ◽  
Nosov E.Y. ◽  
A.S. Tegzhanov ◽  
A.M. Paramonov ◽  
V.N. Blinov ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Operating Parameters ◽  
New Class ◽  
Hybrid Power ◽  
Positive Displacement ◽  
Power Machine ◽  
Compressed Gas ◽  
Integral Characteristics ◽  
Hybrid Power Machine ◽  
Discharge Pressure

Piston hybrid power machines combining the functions of a compressor and a pump in one unit have become widespread, with a new class of machines that do not have a crosshead currently under development. A prototype of such a machine was designed and manufactured based on the new concept of a crossheadless piston hybrid power machine. A plan for conducting a series of experimental studies was developed. The experimental studies confirmed the feasibility of the prototype in the entire range of independent operating parameters (discharge pressure in the compressor section, discharge pressure in the pump section, the number of revolutions of the crankshaft). The effect of operating parameters on the instantaneous and integral characteristics of the compressor and the pump sections of the crossheadless piston hybrid power machine was also assessed through the experimental studies.

scholarly journals Development and Research of Crosshead-Free Piston Hybrid Power Machine

Machines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 32
Author(s):  
Viktor Shcherba ◽  
Viktor Shalay ◽  
Evgeniy Nosov ◽  
Evgeniy Pavlyuchenko ◽  
Ablai-Khan Tegzhanov
Keyword(s):  
Experimental Studies ◽  
Operational Parameters ◽  
Work Processes ◽  
Free Piston ◽  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Simplifying Assumptions ◽  
Cylinder Piston ◽  
Groove Seal

This article considers the development and research of a new design of crosshead-free piston hybrid power machine. After verification of a system of simplifying assumptions based on the fundamental laws of energy, mass, and motion conservation, as well as using the equation of state, mathematical models of the work processes of the compressor section, pump section, and liquid flow in a groove seal have been developed. In accordance with the patent for the invention, a prototype of a crosshead-free piston hybrid power machine (PHPM) was developed; it was equipped with the necessary measuring equipment and a stand for studying the prototype. Using the developed mathematical model, the physical picture of the ongoing work processes in the compressor and pump sections is considered, taking into account their interaction through a groove seal. Using the developed plan, a set of experimental studies was carried out with the main operational parameters of the crosshead-free PHPM: operating processes, temperature of the cylinder–piston group and integral parameters (supply coefficient of the compressor section, volumetric efficiency of the pump section, etc.). As a result of numerical and experimental studies, it was determined that this PHPM design has better cooling of the compressor section (decrease in temperature of the valve plate is from 10 to 15 K; decrease in temperature of intake air is from 6 to 8 K, as well as there is increase in compressor and pump section efficiency up to 5%).

Calculation of Rational Values of Discharge Pressures in the Compressor and Pump Sections of a Crossheadless Reciprocating Hybrid Power Machine

2018 ◽  
Vol 54 (5-6) ◽  
pp. 418-424 ◽  
Author(s):  
V. E. Shcherba ◽  
G. S. Aver’yanov ◽  
V. S. Kalekin ◽  
S. V. Korneev ◽  
A. S. Tegzhanov
Keyword(s):  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine

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

2020 ◽  
pp. 40-49
Author(s):  
V.E. Shcherba ◽  
G.S. Averyanov ◽  
S.A. Korneev ◽  
S.V. Korneev ◽  
A.Y. Ovsyannikov ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Surface Temperature ◽  
Distilled Water ◽  
Average Surface ◽  
Working Chamber ◽  
Hybrid Power ◽  
Average Surface Temperature ◽  
Transmission Oil ◽  
Power Machine ◽  
Hybrid Power Machine

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.

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

2020 ◽  
pp. 62-72
Author(s):  
V.E. Shcherba ◽  
A.Y. Ovsyannikov ◽  
E.Y. Nosov ◽  
G.S. Averyanov ◽  
S.A. Korneev ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Experimental Studies ◽  
Relative Increase ◽  
Single Stage ◽  
Intensity Effect ◽  
Technical Work ◽  
Hybrid Power ◽  
Power Machine ◽  
Hybrid Power Machine ◽  
Working Processes

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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