scholarly journals The Impact of Slipper Microstructure on Slipper-Swashplate Lubrication Interface in Axial Piston Pump

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 222865-222875
Author(s):  
Jihai Jiang ◽  
Zebo Wang ◽  
Geqiang Li
Author(s):  
Hesheng Tang ◽  
Yan Ren ◽  
Jiawei Xiang ◽  
Kumar Anil

The spherical dimple texture have been designed on the rough surface of slipper bearing for improving the lubrication performance in axial piston pump. In this work, we have investigated and optimized the structure parameters of textures to obtain minimum friction coefficient as well as maximum loading capacity. Optimization of the geometry parameters of dimple texture by the integration of a hybrid evolutionary optimization method based on the sequential quadratic programming and genetic algorithm. Parametric analysis is applied for the evaluation of the impact level of geometry parameters on lubrication performance. The results shows that hybrid genetic method can be used for the optimization of slipper bearing with spherical dimple textures to generate lower friction coefficient and greater capacity of load carrying. The carrying capacity and friction coefficient of slipper bearing demonstrate a 64.8% and 4.5% improvements after multi-objective optimization. When the texture radius and depth are set to 18 µm and 0.8 µm, there exists the greatest load carrying force and lowest friction coefficient. This work presents a key designing guide for axial piston pump textured slipper bearings.


2004 ◽  
Vol 126 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Noah D. Manring ◽  
Zhilin Dong

In this paper, the control and containment forces acting on the swash plate of an axial-piston pump are examined. The most novel aspect of this research is that it includes the analysis of a secondary swash-plate angle that is occasionally used in aerospace pump applications. From a practical standpoint, swash-plate control and containment devices take on many different designs; however, they must all resist the same essential moments and forces that attempt to dislocate the swash plate from its proper position. By considering the basic machine design without its control and containment mechanisms, this work generally derives the needed forces and moments for insuring proper swash plate motion and thereby gives the designer of these machines a useful tool for designing control and containment devices of any type. In this research, the dynamic characteristics of the control and containment forces are studied by deriving instantaneous and average equations of motion for the swash plate. Results from this analysis are generated by holding the pump speed and discharge pressure constant, and by prescribing a typical second-order response for the primary swash plate angle. In conclusion, it is shown that the primary advantage of implementing a secondary swash-plate angle is that it can be used to reduce the overall control effort of the pump. Disadvantages of using the secondary swash-plate angle are associated with additional containment requirements for the swash plate.


IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 24971-24977 ◽  
Author(s):  
Jiang Jihai ◽  
Wang Kelong ◽  
Wang Zebo ◽  
Sun Yi

AIP Advances ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 115221
Author(s):  
Jihai Jiang ◽  
Boran Du ◽  
Jian Zhang ◽  
Geqiang Li

2011 ◽  
Vol 308-310 ◽  
pp. 388-400
Author(s):  
Xiao Gang Zhang ◽  
Long Quan

In order to realize that an asymmetric flow piston pump can control an asymmetric differential cylinder, a proposal about the application of an asymmetric flow-distributing axial piston pump is put forward. The new type of piston pump can output the flows with two different values to control the movement of the differential cylinder directly in the closed circuit and realize much ideal result of the control of the differential cylinder by a single pump. Also a simulation model of the hydraulic pump is established under the circumstance of SimulationX software, considering the characteristics of the movement of an individual piston, the oil compressibility, and the flow distribution area changed with the rotation angle. The key data of the pump is defined by means of digital simulation. In particular, an analysis is made on the dimension of the unloading groove of the port plate and the characteristics of the flow pulse of the pump. Furthermore, an experimental model pump is manufactured, the basic performances of the pump is tested on the experimental platform at various rotatory speeds such as pressure, flow and noise, in the end the accuracy of the principle is verified.


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