Temperature rise of journal bearing of the high-speed circular arc gear pump

Zhou, Yang; Yuan, Chunyan

doi:10.1177/0954406219896818

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…A scheme of a hydrostatic bearing with one supporting chamber located under the line of action of the external force is proposed. The above analysis of the influence of the design parameters of a single-chamber hydrostatic bearing on its characteristics was not considered in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The calculation results show the possibility of using a single-chamber hydrostatic bearing in fuel pump supports.…”

Section: Discussion Of Results Of Investigating the Characteristics O...mentioning

confidence: 99%

“…Under start and stop modes, the bearing operates at large eccentricities when its characteristics are nonlinear. In [9], an increase in the tem-perature of support bearings in a gear-type pump was considered. The temperature rise of the journal bearings in the pump was assessed for bearings with and without herringbone grooves.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Identifying the influence of design parameters of single-chamber hydrostatic bearing of fuel pump on its main characteristics

Nazin

2024

EEJET

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The object of this study is hydrostatic processes in the fluid friction bearings of gear-type aviation fuel pumps. The problem of the influence of the design parameters of a single-chamber hydrostatic bearing on its main characteristics was solved. The main characteristics were considered to be the load-bearing capacity and the flow rate of the working fluid. When determining the main characteristics of a single-chamber hydrostatic bearing, the Reynolds and flow balance equations were solved jointly. The resulting diagram of pressure distribution over the working surface of the bearing was used to determine the main characteristics. The influence of the clearance, nozzle diameter, and chamber width on the load-bearing capacity and working fluid flow of a single-chamber hydrostatic bearing was studied. It has been established that as the gap increases, the load-bearing capacity of a single-chamber bearing decreases, and the flow rate of the working fluid increases. As the nozzle diameter increases, the bearing's load-bearing capacity increases. Increasing the width of the chambers leads to an increase in the load-bearing capacity and flow of working fluid through the bearing. When the gap increases from 0.0125 mm to 0.0425 mm, the bearing capacity decreases by 1.156 times. The flow rate of working fluid through the bearing increases by 1.4 times. With an increase in the nozzle diameter from 1.5 mm to 3 mm, the bearing capacity increases slightly by approximately 1.02 times. Increasing the width of the chambers from 4 mm to 8 mm increases the load-bearing capacity by 1.29 times and increases the flow rate of working fluid by 1.4 times. The results show that a single-chamber hydrostatic bearing can provide the required load-bearing capacity by selecting design parameters. The given mathematical dependences could be used for practical calculations of single-chamber hydrostatic bearings

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Section: Discussion Of Results Of Investigating the Characteristics O...mentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identifying the influence of design parameters of single-chamber hydrostatic bearing of fuel pump on its main characteristics

Nazin

2024

EEJET

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“…In the underground hydraulic support, shearer, conveyor, and other fully mechanized mining equipment, a high water-based emulsion medium piston pump is widely used as a hydraulic power source. 1,2 The high water-based emulsion is composed of emulsion and water at a volume ratio of 5:95, and the emulsion is mainly composed of a large number of mineral oil concentrate and trace emulsifiers, corrosion inhibitors, mildew inhibitors, etc. 3 Compared with traditional mineral oil lubrication, the high water-based emulsion has unique advantages such as extensive medium sources, environmental friendliness, and difficult combustion.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the tribological properties of high water-based piston friction pairs with different ceramic materials

Kou

et al. 2022

Advances in Mechanical Engineering

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The effects of load and reciprocating frequency on reciprocating sliding of ZrO2/steel, Si3N4/steel, and SiC/steel under high water-based emulsion lubrication were studied by the ball-block sliding tester, including a series of tribological behavior and wear mechanisms. Through the analysis of the above characteristics, determine the influence of load and frequency on the friction and wear properties of the ceramic/steel friction pair. The results show that with the increase of load, the friction coefficient of the three ceramic friction pairs decreases, and the wear rate increases continuously. With the increase of frequency, the friction coefficients of ZrO2/steel and Si3N4/steel steadily decrease, the friction coefficient of SiC/steel increases slightly, and the wear rates of the three friction pairs decrease continuously. The comprehensive comparison shows that the ZrO2/steel friction pair shows the best tribological performance under different working conditions, which is more suitable for the friction pair material of high water-based hydraulic components, and the Si3N4/steel friction pair shows better wear resistance when the load is above 50 N.

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Design and fluid analysis of the microsegment gear tooth profile for pump operating at high speed and high pressure

Huang,

Han,

Xiong

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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In order to solve the problem of oil trapping in involute gear pumps, a new tooth profile based on the microsegment tooth profile and incorporating the circular arc tooth profile theory has been designed in this study. Firstly, the tooth profile equation of the microsegment gear profile for the pump has been derived. Then, the spatial tooth surface equation of the helical microsegment gear for the pump has been derived, and the feasibility of the new tooth profile has been verified using the contact spot experiment. The characteristics of the new gear profile without oil trapping and the closed “8” type mesh line have been analyzed, from which the output flow rate of the microsegment gear pump has been verified to be constant. A conclusion has been drawn on the applicability of the microsegment gear tooth profile for the pumps. Further, the fluid analysis model of the microsegment gear pump has been proposed to analyze the oil pressure distribution and state of fluid motion at high pressures in the microsegment gear pump. A comparison of the performances of the involute and the microsegment gear pumps shows that the output pressure and maximum pressures of the microsegment gear pump are smoother than that of the involute gear pump. Analysis of the effect of the high rotational speed on the output oil pressure and the maximum pressure shows that the former increases, whereas the latter varies very little with the rotational speed.

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Temperature rise of journal bearing of the high-speed circular arc gear pump

Cited by 4 publications

References 11 publications

Identifying the influence of design parameters of single-chamber hydrostatic bearing of fuel pump on its main characteristics

Identifying the influence of design parameters of single-chamber hydrostatic bearing of fuel pump on its main characteristics

Experimental study on the tribological properties of high water-based piston friction pairs with different ceramic materials

Design and fluid analysis of the microsegment gear tooth profile for pump operating at high speed and high pressure

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