The Impact of Linear Deformations on Stationary Hydrostatic Thrust Bearings

Manring, Noah D.; Johnson, R. E.; Cherukuri, Harish P.

doi:10.1115/1.1482118

Cited by 33 publications

(18 citation statements)

References 4 publications

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“…From Manring, Johnson, et al (2002) and Manring, Wray, et al (2004), the balance force can be described as a linear function of piston pressure such that:…”

Section: S Wangmentioning

confidence: 99%

“…The oil-film parameters, slipper tilting angle, and mean clearance of the piston assembly are considered by theoretical analysis and experiments to investigate the dynamic characteristics of the slipper bearing Yamaguchi, 1982, 1983). The flow rate and load carrying capacity of the slipper bearing have been investigated in theoretical and experimental methods under different deformation conditions (Manring, Johnson, et al, 2002;Manring, Wray, et al, 2004). To stabilize the motion of pistons, Yamaguchi (1976) used a type of piston with which the film thickness between the cylinder and the piston varies exponentially with respect to the longitudinal position of the piston.…”

Section: Introductionmentioning

confidence: 99%

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Robust Design of Piston Assemblies in an Axial Piston Pump

Wang

2014

International Journal of Fluid Power

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The piston slipper in an axial piston pump demonstrates most complicated dynamic motions: two rotations (tilting toward to the swash plate and rotating about the pump shaft) and one translation together with the pumping piston. In addition, the slipper is used to lubricate the swash plate surface with hydraulic oil, but prevents high pressure fluid escaping from the piston bores. In hydraulic engineering, improper designs of the piston and slipper assembly cause many instability and unbalance issues while the slipper attempts to lift and tilt off the swash plate. This may cause catastrophic failure and damage to a piston pump. To suppress the undesirable motion is one of most design difficulties that might take a range of different dynamics into consideration and compromise the design parameters of piston assemblies.In this study, the complicated dynamics are simplified and linearized with some assumptions that are able to apply stability conditions. The dynamic response of the assembly as operating needs to follow its desired rotating movement, i.e. the swash plate angular position. The slipper motion is affected by its inputs (including piston bore pressure, hold-down forces, etc.). This paper investigates the dynamic behavior of the piston and slipper assembly by using the parameter perturbation analysis (PPA) method. The results can be used as robust design recommendations for piston assemblies in the piston pump from a novel perspective.

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“…From Manring, Johnson, et al (2002) and Manring, Wray, et al (2004), the balance force can be described as a linear function of piston pressure such that:…”

Section: S Wangmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust Design of Piston Assemblies in an Axial Piston Pump

Wang

2014

International Journal of Fluid Power

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“…N.D.Manring [1] analyzed the impact of linear deformation on the flow rate and the load carrying capacity of the stationary hydrostatic bearing. Jaw-Ren Lin [2] analyzed the effect of surface roughness on the dynamic stiffness and damping characteristics of compensated hydrostatic thrust bearings.…”

Section: Introductionmentioning

confidence: 99%

Loading Capacity Analysis of Hydrostatic Oil Pad Based on Fluid-structure Coupling

Zhao¹,

Zhang²,

Yu³

2016

Proceedings of the 2016 International Conference on Mechatronics Engineering and Information Technology

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Abstract. Hydrostatic guideway is the key component of heavy-duty CNC machine tool feed system. The working performance of the hydrostatic guideway have great influence to the accuracy of machine tool. In order to analysis the performance of the oil pad, a calculation method based on Reynolds equation and the thin plate deformation equation, considering the fluid-structure coupling, is established. The influence of film thickness, oil supply parameter and inclination to the performance of the oil pad are discussed. It is shows that loading capacity declined compared with the situation which is not considering the fluid-structure coupling.

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“…Kazama [1] analytically calculated the tribological characteristics of an over-clamped slipper. The other, Manring, Wray and Dong [2] [3], Iboshi and Yamaguchi [4] [5], Tanaka, Nakahara, Kyogoku and Fujita [6], Yabe and Kubo [7] have studied the motion and tribological characteristics of slippers theoretically and experimentally. However, the behavior of slippers has not been studied under real-life operating conditions with a focus on application to hydraulic motors and pumps, particularly those used in construction machinery.…”

Section: Introductionmentioning

confidence: 99%

305 Experiment on Slippers behavior in Swashplate-Type Axial Piston Motors

Suzuki

Akita

Suzuki

et al. 2011

The Proceedings of Ibaraki District Conference

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The slippers behavior in swashplate-type axial piston motors was measured by the test rig. The operating conditions were supply pressure of up to 35 MPa and rotational speeds of 0-26.7 s −1. A petroleum-type hydraulic oil with a viscosity grade of 46 was used as the test fluid, and the temperature was maintained at value between 30 and 60 ºC. The experiment examined the influences of supply pressure, rotational speed and oil temperature. The displacement between a slipper and a rotational disk, tilt angle, azimuth angle of a slipper and frictional torque are reported. As the supply pressure increased, the clearance between the slipper and the disk, the slipper tilt angle and the slipper azimuth angle decreased, and the frictional torque increased. As the rotational speed increased, the displacement and the slipper tilt angle increased. As the oil temperature increased, the displacement decreased and the slipper tilt angle increased.

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The Impact of Linear Deformations on Stationary Hydrostatic Thrust Bearings

Cited by 33 publications

References 4 publications

Robust Design of Piston Assemblies in an Axial Piston Pump

Robust Design of Piston Assemblies in an Axial Piston Pump

Loading Capacity Analysis of Hydrostatic Oil Pad Based on Fluid-structure Coupling

305 Experiment on Slippers behavior in Swashplate-Type Axial Piston Motors

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