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Peng Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Design and Experimental Study of Radial Piston Pump With Valve Plate Distribution
    Volume 14: Design Systems and Complexity, 2019
    Co-Authors: Peng Dong, Shengdun Zhao, Peng Zhang, Yongfei Wang, Dean Meng, Yuanzhe Dong
    Abstract:

    Abstract In the field of forging machinery and construction machinery, the hydraulic transmission has become the preferred transmission mode for its high efficiency. The hydraulic Pump is the core component of the transmission system as the power component. It is also the main research focus in the field of hydraulic transmission in recent years. According to the axis direction of the Piston and the drive shaft, the Piston Pump can be grouped into radial Piston Pump and axial Piston Pump. There are two shafts in the conventional radial Piston Pumps, which are distribution shaft and drive shaft to complete distribution the Pump and transmission work, and the friction between the shoes and the stator is high for its high load and relative sliding speed. In order to reduce the impact of these drawbacks on Pump performance, a valve plate is designed to distribute the oil to avoid the stress of the conventional distribution shaft in this paper. The working principle of the radial Piston Pump is discussed. An electro-hydraulic proportional servo control system was adopted to control the displacement of the Pump. The design and manufacturing of the radial Piston Pump were completed. A test platform is carried out to test the performance and the variable displacement control system of the radial Piston Pump with a good test result. The radial Piston Pump has a certain novelty in structure and has practical value.

  • Double-rotator and valve plate distribution radial Piston Pump
    Assembly Automation, 2019
    Co-Authors: Peng Dong, Shengdun Zhao, Peng Zhang
    Abstract:

    The drive shaft and the distribution shaft of a traditional radial Piston Pump are in a cantilever state. To solve this problem, this paper aims to present a radial Piston Pump with through shaft driving and valve plate distribution.,The working principle of the Pump is discussed in detail. In this radial Piston Pump, valve plate distribution parts are designed to distribute oil to the Piston chambers, and the distribution shaft is replaced. A bearing is installed between the stator and rotator to reduce the friction. The transmission shaft is supported by two bearings to ensure smooth operation. The support force of the transmission shaft is optimized. In addition, the flow pulsation principle is presented. To accomplish the change, the displacement of the radial Piston Pump, the proportional control system is designed.,After completing the machining and assembly of the Pump, an experimental study was carried out. The results show that the output flow of the Pump is basically the same as the theoretical flow.,The friction between the slipping shoes and the stator is greatly reduced due to the function of rolling bearings. The higher stability of the driveshaft is obtained for the reason of double-sided support. The radial Piston Pump has a novel structural design in reducing the friction between the shoes and the stator and improving the stability of the transmission shaft.

  • Design and calculation of return mechanism of axial Piston Pump with centre-spring supporter
    2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA), 2015
    Co-Authors: Peng Zhang, Yunhua Li, Liman Yang, Chao An
    Abstract:

    This paper deals with the design of the back-stroke mechanism of the aviation axial Piston Pump. The back-stroke plate is commonly used and supported by retainer spring or limited by keeping-ring. The force analysis was carried out, and the method of design and calculating for the center spring force and the retainer plate size of the retainer plate structure were discussed. Simulation analysis was conducted with the relative velocity of contact point of the slipper retainer and bowl guide, and the factors affecting the relative velocity was analyzed. These works are of important significance for the design of the axial Piston Pump.

Xu Bing - One of the best experts on this subject based on the ideXlab platform.

  • Development of Axial Piston Pump/motor Technology
    Chinese Journal of Mechanical Engineering, 2020
    Co-Authors: Xu Bing
    Abstract:

    The technological evolution in the development process of the axial Piston Pump/motor is introduced in detail and its development trend is analyzed.In view of the main problems of the axial Piston Pump/motor,the research status at home and abroad is described.The emerging new technologies and new methods of the axial Piston Pump/motor on the basis of the progress of computer technology and electronic measurement technology are introduced.Finally,according to the development of axial Piston Pump/motor in China,some requirements are proposed,and the prospects are visualized.It is pointed out that so long as we follow closely the international trend and constantly bring forth new technologies and methods,our axial Piston Pump/motor technology will catch up forthwith and continue to play an important role in our modernization construction.

  • The Modal Analysis and Structural Optimization Based on the Shell of the Axial Piston Pump
    Machine Tool & Hydraulics, 2020
    Co-Authors: Xu Bing
    Abstract:

    The ANSYS software was used to build the simplified axial Piston Pump model and its modal was analyzed.According to the results of modal analysis,a certain amount of optimization was done on the structure of the shell and the influence on the intrinsic mode frequency of the shell by regional thickening of the shell and laying some additional strengthening ribs on the shell was analysed.After the optimization of the shell structure,the intrinsic mode frequency of the Piston Pump has a certain increase,indicating that the structural stiffness of Piston Pump has been strengthened and it is conducive to reducing vibration and noise of the Piston Pump.

  • Structural Design of a Cross Wobble Plate Driving Axial Piston Pump based on ADAMS and AMESim Co-simulation
    2019 IEEE 8th International Conference on Fluid Power and Mechatronics (FPM), 2019
    Co-Authors: Qian Jian-yong, Xu Bing, Zhang Hun-yang, Yue Yi-ming
    Abstract:

    As the main power unit of hydraulic system , the swash plate axial Piston Pump has the advantages of stable performance, high rated pressure, high flow rate and high power ta weight ratio. However , he structure of the traditional swash plate axial Piston Pump is complex. There is reasonable contact between the slipper and the swash plate. There is severe sliding friction between them when the Piston Pump rotates, which can easily lead to the wear of the slipper Besides, the Piston can be easily stuck by the large lateral force between the Piston and the cylinder, which will affect the reliability and life of the Piston Pump. All there shortcomings limit the increase of the rotational speed and pressure of the swash plate axial Piston Pump. This study is based on a new type of cross wobble plate driving axial Piston Pump structure, its kinetic model and hydraulic model are established in ADAMS and AMESim respectively, then its liquid-solid coupling model is established in the ADAMS and AMESim co-simulation. The force situation and kinetic characteristics of the key components of the cross wobble plate driving axial Piston Pump such as Piston and cylinder are analyzed and the lateral force variation curve between the Pistons and cylinder block is drawn by ADAMS and AMESim co-simulation. Compare the co-simulation results with the theoretical calculation and Matlab calculation results of this model, the structural rationality and motion stability of the cross wobble plate driving axial Piston Pump is verified and its advantage that it has a significantly lower lateral force value compared to traditional swash plate axial Piston Pump is shown.

  • Modeling and analysis of the churning losses characteristics of swash plate axial Piston Pump
    2015 International Conference on Fluid Power and Mechatronics (FPM), 2015
    Co-Authors: Xu Bing, Zhang Junhui, Li Ying
    Abstract:

    High efficient use of axial Piston Pumps is a key demand for fluid transmission systems today. The efficiency characteristics of Piston Pumps is mainly studied on the volume losses and the mechanical damage. However, when the Pump is working at high speed, small displacement and low pressure conditions, the churning losses due to the rotation of the Pump accounts for the main factors of the total losses in the axial Piston Pump. Therefore, this paper established a mathematical model of an axial Piston Pump churning losses, and set up the coupling simulation model of Piston Pump rotation components that combined with commercial software. Simulation analyzing and verifying the churning losses varied with different working conditions. Then finding out the main factors which affected the churning losses. Finally providing guidance methods to further calculate the efficiency of the axial Piston Pump.

  • Clearance optimization of Piston/cylinder pair based on virtual prototype of axial Piston Pump
    Proceedings of 2012 IEEE ASME 8th IEEE ASME International Conference on Mechatronic and Embedded Systems and Applications, 2012
    Co-Authors: Zhang Junhui, Xu Bing
    Abstract:

    The virtual prototype of axial Piston Pump is discussed in details through its application in the investigation on Piston/cylinder pair. Three sub-models are introduced firstly. The data are transferred between three sub-models through the software interfaces. The liquid-solid coupling and rigid-flexible coupling of Piston/cylinder pair model are achieved through the co-simulation model. Then several related test rigs are mentioned. The comparisons of simulation results and experimental results demonstrate that the virtual prototype of axial Piston Pump has a satisfying accuracy and a great potential in axial Piston Pump design. At last, the influence the average clearance height of Piston/cylinder pair is analyzed. The simulation results indicate that the reduction of the average clearance height between Piston and cylinder bore contributes to the reduction of leakage and friction force of Piston/cylinder pair, and the improvement of the carrying ability of the lubricating oil film.

Bing Xu - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Non-Uniform Pistons Distribution on Axial Piston Pump Flow Ripple
    2019 IEEE 8th International Conference on Fluid Power and Mechatronics (FPM), 2019
    Co-Authors: Fei Lv, Xiaochen Huang, Chunfeng Zhang, Bing Xu
    Abstract:

    The pressure ripple which causes vibration and noise of hydraulic systems are derived from the interaction of the high-frequency flow ripple of Piston Pumps and the resistance of hydraulic systems. Since an efficient method to reduce the vibration and noise can be started from the flow ripple of the Piston Pump. In this paper, a cylinder in which Pistons distribute non-uniformly is come up to adjust the frequency component of the flow ripple. The geometrical vector method is utilized to analyze the kinematic flow rate of the non-uniform Piston Pump and the significant frequency component of the kinematic flow ripple moves to low frequency. A simulation model based on a single Piston chamber is established and a complete non-uniform distribution Piston Pump model is integrated, then the reduction of the significant frequency component amplitude is validated by the simulation results. Some of the conclusions provide suitable guidance for the control of Piston Pumps flow ripple.

  • Novel three-Piston Pump design for a slipper test rig
    Applied Mathematical Modelling, 2017
    Co-Authors: Junhui Zhang, Qun Chao, Bing Xu, Qiannan Wang, Yuan Chen
    Abstract:

    Abstract Slipper's micro motions including the squeezing motion, spinning motion, and tilting motion have a significant impact on its lubricating condition and dynamic behavior. However, few experimental studies are on these micro motions within a real axial Piston Pump, especially the slipper's spinning motion. The experimental investigations on the slipper in the past mainly focused on the parameters of the oil film such as pressure, thickness, and temperature. The sensors were often installed in the fixed swash plate when the cylinder block was chosen to rotate. Alternatively, the sensors were mounted in the fixed modified slipper when the swash plate rotated. The biggest challenge of the direct measurements of these micro motions is the space limitation for the sensor installation due to the compact structure of axial Piston Pumps as well as the slipper's macro motion. This paper presents a new three-Piston Pump for the slipper test rig which can provide enough installation space for the sensor. To realize the cylinder block balance, a hold-down plate is first introduced into this three-Piston Pump. In addition, a detailed set of relevant equations is derived to evaluate the functionality of the hold-down plate. Finally, the slipper's spinning motion was measured directly and continuously using this three-Piston Pump, which confirmed the capability of the slipper test rig.

  • A new design method for the transition region of the valve plate for an axial Piston Pump
    Journal of Zhejiang University Science, 2015
    Co-Authors: Bing Xu, Junhui Zhang
    Abstract:

    The optimization of the valve plate transition region is an important way of reducing the noise emission for an axial Piston Pump. However, the optimized methods through simulation or experiment are actually trial and error, and they cannot indicate the precise structural parameters of the valve plate transition region. In this study, a new design method for the transition region of valve plate based on the matching of flow area and reduction of transient reverse flow was proposed, and with which a valve plate was designed. Then, the impact of the flow ripple in the discharge line of an axial Piston Pump and the pressure overshoot and undershoot in the Piston chamber on hydraulic and structural noise for axial Piston Pump is discussed. The noise reduction effect of the axial Piston Pump with this valve plate was analyzed by adopting a flow characteristic simulation model. Finally, the results showed that the application of this design method could contribute much to the reduction of the flow ripple and elimination of the pressure overshoot and undershoot. As a consequence, the method can be used in the design of a low-noise open circuit axial Piston Pump.

  • pre compression volume on flow ripple reduction of a Piston Pump
    Chinese Journal of Mechanical Engineering, 2013
    Co-Authors: Bing Xu, Yuechao Song, Huayong Yang
    Abstract:

    Axial Piston Pump with pre-compression volume(PCV) has lower flow ripple in large scale of operating condition than the traditional one. However, there is lack of precise simulation model of the axial Piston Pump with PCV, so the parameters of PCV are difficult to be determined. A finite element simulation model for Piston Pump with PCV is built by considering the Piston movement, the fluid characteristic(including fluid compressibility and viscosity) and the leakage flow rate. Then a test of the Pump flow ripple called the secondary source method is implemented to validate the simulation model. Thirdly, by comparing results among the simulation results, test results and results from other publications at the same operating condition, the simulation model is validated and used in optimizing the axial Piston Pump with PCV. According to the Pump flow ripples obtained by the simulation model with different PCV parameters, the flow ripple is the smallest when the PCV angle is 13°, the PCV volume is 1.3×10−4 m3 at such operating condition that the Pump suction pressure is 2 MPa, the Pump delivery pressure 15 MPa, the Pump speed 1 000 r/min, the swash plate angle 13°. At the same time, the flow ripple can be reduced when the Pump suction pressure is 2 MPa, the Pump delivery pressure is 5 MPa,15 MPa, 22 MPa, Pump speed is 400 r/min, 1 000 r/min, 1 500 r/min, the swash plate angle is 11°, 13°, 15° and 17°, respectively. The finite element simulation model proposed provides a method for optimizing the PCV structure and guiding for designing a quieter axial Piston Pump.

J Watton - One of the best experts on this subject based on the ideXlab platform.

  • a complete analysis of axial Piston Pump leakage and output flow ripples
    Applied Mathematical Modelling, 2012
    Co-Authors: J M Bergada, S Kumar, Ll D Davies, J Watton
    Abstract:

    Abstract The paper is focused on understanding the flow losses and the resulting flow/pressure dynamics in a Piston Pump. Initially, equations to evaluate leakages in all Piston Pump gaps will be presented and tested against numerical models, later the equations will be linked to determine the general pressure/flow Pump dynamic characteristics. The model will also provide the temporal pressure in each Piston/cylinder chamber and the temporal leakage in all Pump clearances. A test rig able to measure the dynamic pressure inside a Piston chamber was build and employed to evaluate pressure ripple dynamics as a function of turning speed, outlet pressure and swash plate angle. The comparison between experimental and simulated results is very good, giving confidence to the model presented. The advantage of using the analytical approach is that explicit equations allow a more direct understanding of the effect of dimension changes and operating conditions on Pump dynamics. Fluid used hydraulic oil ISO 32.

Peng Dong - One of the best experts on this subject based on the ideXlab platform.

  • Design and Experimental Study of Radial Piston Pump With Valve Plate Distribution
    Volume 14: Design Systems and Complexity, 2019
    Co-Authors: Peng Dong, Shengdun Zhao, Peng Zhang, Yongfei Wang, Dean Meng, Yuanzhe Dong
    Abstract:

    Abstract In the field of forging machinery and construction machinery, the hydraulic transmission has become the preferred transmission mode for its high efficiency. The hydraulic Pump is the core component of the transmission system as the power component. It is also the main research focus in the field of hydraulic transmission in recent years. According to the axis direction of the Piston and the drive shaft, the Piston Pump can be grouped into radial Piston Pump and axial Piston Pump. There are two shafts in the conventional radial Piston Pumps, which are distribution shaft and drive shaft to complete distribution the Pump and transmission work, and the friction between the shoes and the stator is high for its high load and relative sliding speed. In order to reduce the impact of these drawbacks on Pump performance, a valve plate is designed to distribute the oil to avoid the stress of the conventional distribution shaft in this paper. The working principle of the radial Piston Pump is discussed. An electro-hydraulic proportional servo control system was adopted to control the displacement of the Pump. The design and manufacturing of the radial Piston Pump were completed. A test platform is carried out to test the performance and the variable displacement control system of the radial Piston Pump with a good test result. The radial Piston Pump has a certain novelty in structure and has practical value.

  • Double-rotator and valve plate distribution radial Piston Pump
    Assembly Automation, 2019
    Co-Authors: Peng Dong, Shengdun Zhao, Peng Zhang
    Abstract:

    The drive shaft and the distribution shaft of a traditional radial Piston Pump are in a cantilever state. To solve this problem, this paper aims to present a radial Piston Pump with through shaft driving and valve plate distribution.,The working principle of the Pump is discussed in detail. In this radial Piston Pump, valve plate distribution parts are designed to distribute oil to the Piston chambers, and the distribution shaft is replaced. A bearing is installed between the stator and rotator to reduce the friction. The transmission shaft is supported by two bearings to ensure smooth operation. The support force of the transmission shaft is optimized. In addition, the flow pulsation principle is presented. To accomplish the change, the displacement of the radial Piston Pump, the proportional control system is designed.,After completing the machining and assembly of the Pump, an experimental study was carried out. The results show that the output flow of the Pump is basically the same as the theoretical flow.,The friction between the slipping shoes and the stator is greatly reduced due to the function of rolling bearings. The higher stability of the driveshaft is obtained for the reason of double-sided support. The radial Piston Pump has a novel structural design in reducing the friction between the shoes and the stator and improving the stability of the transmission shaft.