Efficacy of coatings and thermochemical treatments to improve wear resistance of axial piston pumps

Schuhler, G.; Jourani, Abdeljalil; Bouvier, Salima; Perrochat, J.-M.

doi:10.1016/j.triboint.2018.05.007

Cited by 39 publications

(10 citation statements)

References 46 publications

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“…Schuhler et al. 2 studied the main wear mechanism of the slipper–swash plate interface and the multi-technical analysis of possible solutions under and lubricated conditions. Yin et al.…”

Section: Introductionmentioning

confidence: 99%

Relative motion relation in the external return spherical bearing pair of a balanced double-row axial piston pump

Deng

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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Based on the external compaction return mechanism of a balanced double-row axial piston pump and the vector coordinate transformation principle, a mathematical model of the relative motion relation within the external return spherical bearing pair was built. The influence of slant inclination of the external swash plate and of pump shaft rotating speed and eccentricity on the relative motion trail, movement speed and acceleration was analysed. The relative motion velocity and acceleration between external retainer plate and external spherical hinge, at top and bottom dead centres, were discussed. By increasing the slant inclination of the external swash plate, the relative motion trail increased correspondingly, leading to a larger size of the pump integral structure. The relative speed and acceleration increased with the pump shaft speed and the slant inclination of the external swash plate, leading to a larger fluctuation of the slipper pair oil film. The increase of eccentricity slightly influenced the relative velocity and acceleration along the x-axis, without significantly increasing the fluctuation of the slipper pair oil film. Increasing the pump shaft speed, the external swash plate slant inclination and the eccentricity all caused fluctuations in the relative velocity and acceleration along the y- and z-axes, deepening the grinding crack on the compaction surface of the external retainer plate. In case of eccentricity and a 0° rotation angle of the principal axis, the related acceleration of the radial friction surface of the retainer plate showed the largest fluctuation amplitude, and a scratch could easily occur.

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“…Schuhler et al. 2 studied the main wear mechanism of the slipper–swash plate interface and the multi-technical analysis of possible solutions under and lubricated conditions. Yin et al.…”

Section: Introductionmentioning

confidence: 99%

Relative motion relation in the external return spherical bearing pair of a balanced double-row axial piston pump

Deng

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…To respond to the effect of the contact pressure in the problem of elastic deformation should be taken into account. Several research works in fretting contact [6][7][8][9][10] have been done in order to reduce fatigue strength, frictions, and wear. However, some other parts and contact interfaces, like the interface between slipper and retainer, which are not well lubricated, are also significant wear and efficiency loss.…”

Section: Introductionmentioning

confidence: 99%

Fracture and Damage Mechanisms of Slipper-Retainer Assembly in Axial Piston Machines

Haidak

Wang

2021

Lecture Notes in Civil Engineering

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Axial Piston Machine is a key component in many hydraulic, agriculture, construction, aeronautic, mobile robots, and many other fields. Its reputation stems from its compactness, relative ease in controlling the effective fluid displacement per shaft revolution, and high-pressure operation. However, it is facing problems of rupture, fracture, and damage of its elements, among which are slipper and retainer. These problems cause fatigue of the entire machine and consequently loss of energy and performance. Thus, to better understand the origin and causes and predict the exaggerated deformation and the increasing deterioration of Axial Piston Machine's components, we first investigated the theoretical modeling, including mathematical and simulation modeling of the slipper-retainer interface. The related external forces and applied loads considering the normal working condition of the machine are analyzed. Also, to better assess the effect of materials, materials with specific characteristics are used for simulating the hydrostatic pressure, stain, and elastic deformation of slipper-retainer assembly. At the end of each simulation, weariness is checked for each material. The most exposed areas of slipper and retainer to the fracture and intensive fatigue are determined. Finally, to validate our simulation results, a new pump is tested for a particular time to observe wear on the surfaces; suggestions are giving for improving the durability of axial piston machines.

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“…By coating on the swash plate steel of an axial-piston pump with different lubricating solutions, it was shown that the comparative advantage and shortcoming coexisted. 6 By coating on stainless steel 304 with WC-10Co-4Cr and Ni-20Cr 2 O 3 , respectively, it was shown that the wear resistance of WC-10Co-4Cr was much better. 7 To reduce the erosive wear, a sample was covered on the blade surface during mixing high temperature slurry with different stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Experiment on the straw particle flow in a centrifugal pump

Zhang

Yan

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Centrifugal pump is extensively used in wastewater, pulp, and biomass industries for transporting of particle flows. The motion and distribution of flexible particles are critical for continuous and stable pumping. In this work, a test rig is set up for straw particle flow pumping. A stroboscopic flash is employed to capture the distribution of the straw particle. The pump performance is measured and compared to that of clear water. By increasing the particle concentration, the process from stable pumping to eventually clogging is observed. Firstly, in a wide operation range with 0.1% concentration, the particle is uniformly distributed in the flow passage and the pump is running in a hydrodynamic stable mode where the power increases gradually and is slightly over the pure water circumstance. However, the high efficiency region is shifted to lower flow rate and it becomes narrower as compared to the pure water case. Secondly, at 0.2% and 0.4% concentration, the performance resembles the 0.1% case. But with increasing concentration, the inception of small flocs is observed. In addition, small air bubble is formed near the rotating axis. This subtle change continues until clogging happens. By gradually increasing the concentration of particle, more and more particles are attached to the growing flocs. Finally, the pump runs into mechanical wear between particles and flow passage, and then it is fully clogged. In this condition, the power consumption increases rapidly and the variable frequency drive is used to bring down the shaft speed. The long-term running shows relatively light erosive wear on the surface of impeller and volute by the particles, but no damage is observed.

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Efficacy of coatings and thermochemical treatments to improve wear resistance of axial piston pumps

Cited by 39 publications

References 46 publications

Relative motion relation in the external return spherical bearing pair of a balanced double-row axial piston pump

Relative motion relation in the external return spherical bearing pair of a balanced double-row axial piston pump

Fracture and Damage Mechanisms of Slipper-Retainer Assembly in Axial Piston Machines

Experiment on the straw particle flow in a centrifugal pump

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