Temperature impact analysis of star gear bearing inner ring based on under-race lubrication passage

Bao, Heyun; Wang, Chunlei; Lu, Fengxia

doi:10.1007/s12206-020-1128-x

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Their results showed the variation in rail pressure induced by each fuel injection cycle. Designs for reciprocating fuel pumps that avoid wear and sticking under varying operating circumstances are essential, as is a rising fuel oil supply pressure in recent medium-speed diesel engines for enhancing combustion performance [9,10]. Along these lines, we provide a suitable clearance design approach to increase the lubrication and endurance of piston fuel pumps.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Structural and Flow Rate Characteristics of the Fuel Injection Pump in a Marine Diesel Engine

Binyamin

2023

Sustainability

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A reciprocating fuel pump system was investigated using a modeling approach. The diesel pump system comprises a variable-sized barrel and plunger. This study investigates the effect of diesel, propane, and DME fuels on the plunger barrel’s deformation and flow rate characteristics. It compares the barrel and plunger displacement as a function of working pressure. Based on the multi-field coupling theory, a numerical fluid–solid thermal coupling model was developed to characterize the operational fluctuations in deformation and clearance. Due to the distinct deformation patterns of the two components, the appropriate clearance for the pump’s head and stem must be set independently. In addition, significant AMESim parameters compared and confirmed the discharge flow rates of three distinct fuels. The results show that the maximum displacement for the plunger stem was 0.00266 mm at 7.5 mm from the top of the stem, which was 6.94% lower than the literature result. The DME fuel showed flow stability initially (from 0.0 to 0.4 s) when using a plunger diameter of 23.85 mm. According to the plunger diameters, the marine fuel injection pump’s discharge flow rates increased, minimizing the wearing between the barrel/plunger. The research findings revealed that the suggested structural and flow rate model is recommended for alternative marine fuel applications.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Structural and Flow Rate Characteristics of the Fuel Injection Pump in a Marine Diesel Engine

Binyamin

2023

Sustainability

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“…First, the slippage during the gear meshing process and the rolling between rollers and raceways convert from dry friction to film Lubrication. The friction heat power decreases as while as the friction resistance decreases [4,5,6] . Along with the increase of the lube's volume fraction, the temperature decreases benefiting from increment of the internal heat exchange area and the internal energy transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

Analysis and simulation of the influence of initial liquid level on lubricating flow state and oil-churning resistance moment of planetary reducer

Wang

Zhang

2023

J. Phys.: Conf. Ser.

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In order to study the influences of the initial liquid level on lube characteristics and oil-churning resistance moment of gear reducer, the heat generating power of one special kind of planet gear reducer under the special working condition is calculated. The fluid temperature at different initial liquid levels is calculated by FEA method. According to the relation between the physical parameters of the lube and the fluid temperature, the corresponding relation between the physical parameters of the lube and the initial liquid level is deduced. Based on the FEA results, the physical parameters of the lube are set to conduct the co-simulation of the oil-churning process of the planetary reducer under different initial liquid levels by MPS method. Depend on the simulation results, the influence of initial liquid level on lubricating flow state and oil-churning resistance moment of planetary reducer is analysed, and the initial liquid level is sifted. These studies provide methods and reference for lubrication medium set in transmission boxes, such as planet gear reducer and so on.

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“…1 The volume of fluid (VOF) method is used to simulate the oil-gas twophase flow in the bearings. The multiple reference frame (MRF) model is used in steady-state research, [2][3][4][5][6] while sliding 7 and dynamic 8,9 grid technologies are used in transient research. Furthermore, the thermal network method analyzes the power loss and temperature field in the bearings.…”

Section: Introductionmentioning

confidence: 99%

Heat-flow coupling variation in double-row tapered-roller bearings during the loss of lubrication process

Bai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Loss of lubrication (LOL) is a severe problem in transmission systems, whereby the temperature increases continuously until failure. The temperature and flow-field distributions are complicated during this process. Limited research exists on the temperature and flow-field distributions and on heat generation of the transmission system during LOL. This study uses the computational fluid dynamics method to establish an oil–gas, two-phase flow model for the asymmetric bearings, and calculate the oil volume fraction on the bearing surface. In addition, a dynamic heat generation calculation method was proposed based on the kinematic viscosity change of the oil–air mixture during the LOL process. The temperature distribution of the large and small rollers and raceway surface during the LOL process was analyzed using a simulation method. The injection parameters were optimized to avoid gluing of the large roller. The internal temperature distribution has a strong positive correlation with the lubricant distribution during the LOL process. Moreover, the lubrication and temperature distributions on the large roller side are worse. A temperature reduction of approximately 25% is possible upon the increase of the number of oil inlets.

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Temperature impact analysis of star gear bearing inner ring based on under-race lubrication passage

Cited by 4 publications

References 11 publications

Numerical Analysis of the Structural and Flow Rate Characteristics of the Fuel Injection Pump in a Marine Diesel Engine

Numerical Analysis of the Structural and Flow Rate Characteristics of the Fuel Injection Pump in a Marine Diesel Engine

Analysis and simulation of the influence of initial liquid level on lubricating flow state and oil-churning resistance moment of planetary reducer

Heat-flow coupling variation in double-row tapered-roller bearings during the loss of lubrication process

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