Multiple frequency vibration of the micro lubricating gap geometry between cylinder block and valve plate in an axial piston pump

Zhang, Zhiqiang; Chen, Yuanyuan; Song, Jing; Jin, Kunshan; Zhou, Haibo

doi:10.1007/s12206-021-1003-4

Cited by 2 publications

(5 citation statements)

References 11 publications

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“…The positive direction is specified as clockwise in Figure 2. The cylinder block tilts relative to the valve plate under the influences of several factors, mainly including the forces acting on the cylinder block and torques due to the forces, eccentric wear of the valve plate, and the coaxiality error between the main shaft and the cylinder block [27].…”

Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

“…Sci. 2024, 14, 3359 3 of 17 The average value M i of the film thickness is affected by the forces on the cylinder block, the torques on that due to the forces, and the eccentric wear of the valve plate [27], which are called the constant factors. The film thickness h m at any point in the lubrication film by the constant factors is expressed as follows:…”

Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

“…The film thickness curves in Figure 3 change periodically with the rotation of the cylinder block, and their amplitudes H i (i = 1, 2, 3) are caused by the coaxiality error between the main shaft and cylinder block [27], which is named the fluctuation factor. The red, blue and green vertical lines in the figure are the amplitudes of the three displacement curves respectively.…”

Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

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Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Zhang,

Ma,

et al. 2024

Applied Sciences

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The film temperature distribution of the valve plate pair in axial piston pumps affects its lubrication, leakage, and friction. In order to investigate the film temperature distribution of the valve plate pair in axial piston pumps, a test platform was constructed including three displacement sensors for the oil film thickness and eleven thermocouples for the film temperature distribution of the valve plate pair. An accurate film shape model of the valve plate pair was built according to the three-point film thickness test data. Based on the film shape model, the film temperature model of the valve plate pair was developed considering the viscous oil temperature characteristics, the energy loss caused by leakage and viscous friction in the film, and the heat conduction among the oil, cylinder block, and valve plate. The influence of different swash plate tilt angles and operating pressures on the valve plate film temperature was studied. The test results indicate that the film temperature of the valve plate pair increases as the working pressure and swash plate tilt angle increase. The theoretical and experimental absolute errors of the film temperature in the circumferential range [−60°, 60°] of the valve plate high-pressure side are less than 3.5 °C. As the swash plate tilt angle varies from 12° to 16° and working pressure from 3 MPa to 7 MPa, the minimum film thickness position and the maximum temperature point move accordingly in the circumferential range [−15°, 5°] of the valve plate pair.

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Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

Section: Modeling Of Lubricating Film Shapementioning

confidence: 99%

See 1 more Smart Citation

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Zhang,

Ma,

et al. 2024

Applied Sciences

Self Cite

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“…Firstly, the original machinery can be disassembled before entering into the secondary utilization manufacturing process, so the disassembling steps of the axial piston pump have become the key research content. The disassembling process and standards also have certain requirements [6]. During the disassembling process, it is necessary to dismantle in the original loading direction, and establish a constraint equation according to the standard direction, which can ensure that the disassembled parts are unobstructed and unconstrained in space.…”

Section: Figure 3: the Core Process Of Mechanical Remanufacturingmentioning

confidence: 99%

“…The disassembly is different from the assembly, and the disassembly the characteristics of independence, versatility and robustness [16]. To put it simply, the disassembling device is a special machine that will be used in mass production, and there are uncertainties in the object to be disassembled, so the disassembling device needs to be able to independently judge and complete the disassembling operation.…”

Section: Simulation Parameter Setting Of Virtual Model Of Disassembli...mentioning

confidence: 99%

Disassembling Process and Technology of Axial Piston Pump for Remanufacturing

2022

IJOMAM

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In response to the "circular economy" policy of the green environmental protection industry, the remanufacturing of axial piston pumps has been studied in depth. Firstly, the structure and working principle of each component of the axial piston pump are deeply studied, and then each component of the piston pump is regarded as an independent part, the contact and spatial relationship between the components are analysed. The disassembling specifications of remanufacturing must be strictly observed, and the principles of stability, safety and independence must be adhered to. Secondly, the spatial position of each component and the constraint relationship between adjacent components are studied in turn. The constraint matrix is established from the two aspects of space and contact, and the model of the disassembling device is designed according to the principle of priority and stability in the disassembling process. Then a complete disassembling process and the system are built, and the internal cycle procedure of the disassembling device is designed. Finally, through the simulation experiment and analysis of the virtual model of the disassembling device, the feasibility of the design scheme is verified by taking the former pump as an example. The results show that the disassembling effect of the disassembling device is all qualified and all parts are not damaged. It meets the requirements of stability, safety and independence, and the disassembly of various models and parts, which has the advantage of batch operation and can improve the disassembling efficiency and quality. It is ensured that the produced products meet the standard quality and can reduce the manufacturing cost and time, and save natural resources. Therefore, the disassembling device of the axial piston pump will be of great significance.

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Multiple frequency vibration of the micro lubricating gap geometry between cylinder block and valve plate in an axial piston pump

Cited by 2 publications

References 11 publications

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Disassembling Process and Technology of Axial Piston Pump for Remanufacturing

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