Evaluation and optimization of axial piston pump textured slipper bearings with spherical dimples based on hybrid genetic algorithm

2020 ◽  
pp. 135065012097249
Author(s):  
Hesheng Tang ◽  
Yan Ren ◽  
Jiawei Xiang ◽  
Kumar Anil
Keyword(s):  
Genetic Algorithm ◽  
Friction Coefficient ◽  
Hybrid Genetic Algorithm ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Genetic Method ◽  
Lubrication Performance ◽  
Load Carrying ◽  
The Impact ◽  
Axial Piston

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.

Lubrication characteristics of the slipper–swash-plate interface in a swash-plate-type axial piston pump

2020 ◽  
pp. 095440622093294
Author(s):  
Xiangxu Meng ◽  
Chang Ge ◽  
Hongxi Liang ◽  
Xiqun Lu ◽  
Xuan Ma
Keyword(s):  
Hydrodynamic Lubrication ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Plate Interface ◽  
Load Pressure ◽  
Swash Plate ◽  
Lubrication Performance ◽  
Lubrication Characteristics ◽  
Axial Piston ◽  
Plate Type

An analytical approach based on a hydrodynamic lubrication model is presented to understand the bearing capacity, leakage, and friction moment of the slipper–swash-plate interface in a swash-plate-type axial piston pump. Furthermore, how the shaft speed, load pressure, and slipper attitude influence the lubrication performance of the interface is analyzed. The research shows that the slipper attitude has a significant effect on the pressure distribution. To improve the lubrication performance, a grooved sealing-land design is proposed, and the location and geometric parameters of the groove are analyzed. The results indicate that the optimal lubrication performance is achieved when the groove is 2.0–3.0 mm wide and 5–20 µm deep at its inner boundary.

scholarly journals Analysis of the Hydrodynamic Lubrication Characteristics of the External Return Spherical Bearing Pair of an Axial Piston Pump/Motor

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Haishun Deng ◽  
Lei Wang ◽  
Yongcun Guo ◽  
Yu Zhang ◽  
Chuanli Wang
Keyword(s):  
Friction Pair ◽  
Piston Pump ◽  
Axial Piston Pump ◽  
Operating Characteristics ◽  
Spherical Coordinate ◽  
Swash Plate ◽  
Lubrication Performance ◽  
Lubrication Characteristics ◽  
Spherical Hinge ◽  
Axial Piston

At present, the study on lubrication of return mechanism friction pair is only for the common axial piston pump, and the influence of kinematic characteristics of contact points between the retainer plate and the spherical hinge on lubrication of return mechanism friction pair is not considered. So, it is hard to directly apply the frictional lubrication characteristic of the bearing to design the external return mechanism. Based on the kinematic and operating characteristics of the external return mechanism and considering the lubrication situation of the friction pair under Newtonian fluid, a Reynolds equation in the spherical coordinate system was deduced, and then the lubrication of the external return spherical hinge under different structural parameters was analysed. The results show that different slant inclination of the external swash plate, pump shaft rotating speeds, and eccentricities all affect the lubrication characteristics of the friction pair, especially the slant inclination of the external swash plate and oil film clearance has great influence on axial leakage flow. Therefore, in the design of external return mechanism of the multirow axial piston pump, the lubrication performance of the external return spherical hinge under different slant inclinations of the external swash plate should be analysed and calculated.

Wear behavior of friction pairs of different materials for ultra-high-pressure axial piston pump

2018 ◽  
Vol 233 (5) ◽  
pp. 945-953 ◽  
Author(s):  
Jin Zhang ◽  
Xiaogang Qiu ◽  
Xuezhi Gong ◽  
Xiangdong Kong
Keyword(s):  
High Pressure ◽  
Friction Coefficient ◽  
Surface Morphology ◽  
Ceramic Materials ◽  
Piston Pump ◽  
Wear Testing ◽  
Axial Piston Pump ◽  
Ultra High Pressure ◽  
Two Samples ◽  
Axial Piston

This paper evaluates the wear of two different materials (ceramic and 30Cr2MoVA) of friction pairs of ultra-high-pressure axial piston by means of experimental investigations. Face sliding wear test was carried out on wear testing machine to analyze the coefficient of friction during boundary friction. Then wear amount of the sample is obtained by weighing with the electronic balance. The change of the surface morphology was observed by a laser confocal microscope. By comparing the friction coefficient, wear amount, surface morphology, temperature change, and roughness of the two samples, it has been found that ceramic materials have lower friction coefficient, better wear resistance, and less oil temperature rise than 30Cr2MoVA material. By the above research results it was found that ceramic materials perform better than 30Cr2MoVA, which provides the foundation for further study of the friction pair of the ultra-high-pressure axial piston pump.

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
Keyword(s):  
Piston Pump ◽  
Axial Piston Pump ◽  
The Impact ◽  
Axial Piston

Wear Testing of Principal Friction Pairs in Axial Piston Pump Based on Taguchi Design Method

2015 ◽  
Vol 779 ◽  
pp. 26-34 ◽  
Author(s):  
Cun Ran Zhao ◽  
Ji Hai Jiang ◽  
Chong Ke
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Design Method ◽  
Friction Pair ◽  
Piston Pump ◽  
Wear Testing ◽  
Wear Loss ◽  
Axial Piston Pump ◽  
Axial Piston ◽  
Selection Of

While axial piston pump is the core component of hydraulic system, its service life and reliability depend much on the selection of materials, friction pairs and process parameters. To identify these factors, wear condition of friction pair is conducted by using MWF-10 wear rig. Based on ANOVA of Taguchi Method,the influences of surface roughness and hardness on wear loss and friction coefficient are compared. In addition, the results show that the optimal friction pair and surface roughness of hard specimens have influence mostly on the wear loss and the friction coefficient.

The Impact of Using a Secondary Swash-Plate Angle Within an Axial Piston Pump

2004 ◽  
Vol 126 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Noah D. Manring ◽  
Zhilin Dong
Keyword(s):  
Equations Of Motion ◽  
Piston Pump ◽  
Plate Motion ◽  
Axial Piston Pump ◽  
Proper Position ◽  
Control Effort ◽  
Pump Speed ◽  
Swash Plate ◽  
The Impact ◽  
Axial Piston

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.

scholarly journals The Impact of Bushing Thickness on the Piston/Cylinder Interface in Axial Piston Pump

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 24971-24977 ◽  
Author(s):  
Jiang Jihai ◽  
Wang Kelong ◽  
Wang Zebo ◽  
Sun Yi
Keyword(s):  
Piston Pump ◽  
Axial Piston Pump ◽  
Piston Cylinder ◽  
The Impact ◽  
Axial Piston
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