Optimization and Influence of Micro-Chamfering on Oil Film Lubrication Characteristics of Slipper/Swashplate Interface within Axial Piston Pump
Abstract
:1. Introduction
2. Lubrication Model and Coupling Algorithm
2.1. Axial Piston Pump Structure
2.2. Kinetic and Force Analysis of Slipper
2.3. Pressure and Power Loss Models
- (1)
- The fluid in the oil film is the incompressible and Newtonian one;
- (2)
- The fluid velocity on the boundary is the same as the velocity of the working surface;
- (3)
- Because the oil film thickness is micron level, the fluid flow can be considered to be the laminar one.
2.4. Coupling Algorithm
3. Impact of Micro-Chamfering on Oil Film Lubrication
4. Optimization of Micro-Chamfering Parameters
4.1. Working Conditons Selected of Optimization
4.2. Optimization Objective
4.3. Optimization of Micro-Chamfering
4.4. Lubrication Perfomance Analysis with Optimal Micro-Chamfering
5. Experiments
6. Conclusions
- (1)
- The oil film thickness decreases with the increase in the working pressure and the swashplate inclination angle, but it increases with the increase in the shaft speed and the pump house pressure.
- (2)
- Micro-chamfering is conducive to generate the oil film lubrication and to reduce the power loss between the slipper and swashplate.
- (3)
- The minimum total power loss can be taken as the optimization objective. The optimal parameter group of micro-chamfering is the width of 1.2 mm and the depth of 3.5 μm or C1.2-3.5.
- (4)
- The simulation results of the optimal parameter group of micro-chamfering are approximately equal to the analytical ones. The experimental results of the power loss of the slipper/swashplate interface are also essentially consistent with the simulation one. The coupling lubrication numerical model and the optimization are proved to be correct and effective to provide a basis for further optimization design of axial piston pumps.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Symbols | Value | Units |
---|---|---|
Rf | 33.5 | mm |
rHSin | 5.9 | mm |
rHSout | 10.7 | mm |
lHK | 2.9 | mm |
dHK | 0.8 | mm |
lHC | 0.9 | mm |
Cq | 0.63 | - |
K | 2 | GPa |
μ | 0.02784 | N·s/m2 |
γ | 18 | ° |
pHouse | 0.1 | MPa |
pL | 10 | MPa |
ω | 1500 | r/min |
Width | LC (mm) | ||||
---|---|---|---|---|---|
Depth | 0.5 | 1.0 | 1.5 | 2.0 | |
HC (μm) | 1 | C0.5-1 | C1.0-1 | C1.5-1 | C2.0-1 |
3 | C0.5-3 | C1.0-3 | C1.5-3 | C2.0-3 | |
5 | C0.5-5 | C1.0-5 | C1.5-5 | C2.0-5 | |
10 | C0.5-10 | C1.0-10 | C1.5-10 | C2.0-10 |
Parameters | Analytical Results | Simulation Results |
---|---|---|
h (μm) | 5.63103 | 5.80803 |
PQ (W) | 4.99 | 2.57 |
PF (W) | 15.32 | 22.07 |
PT (W) | 20.31 | 24.64 |
Shaft Speed (r/min) | Average Friction Power Loss (W) | |
---|---|---|
Experimental Results | Simulation Results | |
1000 | 21.864 | 21.104 |
1500 | 34.372 | 33.795 |
2000 | 51.555 | 50.748 |
Working Pressure (MPa) | Average Friction Power Loss (W) | |
---|---|---|
Experimental Results | Simulation Results | |
5 | 28.823 | 27.611 |
10 | 34.372 | 33.795 |
15 | 39.777 | 38.938 |
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Jiang, J.; Wang, Z. Optimization and Influence of Micro-Chamfering on Oil Film Lubrication Characteristics of Slipper/Swashplate Interface within Axial Piston Pump. Energies 2021, 14, 1961. https://doi.org/10.3390/en14071961
Jiang J, Wang Z. Optimization and Influence of Micro-Chamfering on Oil Film Lubrication Characteristics of Slipper/Swashplate Interface within Axial Piston Pump. Energies. 2021; 14(7):1961. https://doi.org/10.3390/en14071961
Chicago/Turabian StyleJiang, Jihai, and Zebo Wang. 2021. "Optimization and Influence of Micro-Chamfering on Oil Film Lubrication Characteristics of Slipper/Swashplate Interface within Axial Piston Pump" Energies 14, no. 7: 1961. https://doi.org/10.3390/en14071961