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AC Servo axial piston hydraulic motor pump is a permanent magnet synchronous motor swash plate axial piston pump with a high degree of integration of a hydraulic power components . The structure based on a permanent magnet synchronous motor , set inside the rotor swash plate axial piston pump , with a compact , small size, low power-to-weight ratio, noise and vibration , the many advantages of high reliability , and the pump casing of the motor on the design of a special flow path so that the motor pump during operation heat taken away by the flow of the liquid through the flow path to achieve the self - cooling purposes , due to the cancellation of the normal motor cooling tail fan , the effective improvement of the entire machine vibration and noise problems. With the rapid development of the application of computer technology and numerical computation techniques , numerical methods to study the hydraulic system and hydraulic components within the flow field distribution has been able to achieve good results . In this paper, the flow field distribution within the flow path of the oil-absorbing side of the axial piston hydraulic motor pump , motor pump efficiency as well as experimental testing of the prototype aspects , numerical simulation , the combination of theoretical analysis and experimental analysis more in-depth study . First , the use of computational fluid dynamics ( Computational Fluid Dynamics the \in particular, can be observed to the plunger cavity and the stator and rotor oil interstitial flow field distribution , the structural design of the flow channel of the hydraulic motor pump so as to judge whether it is reasonable to provide a basis to provide a reference for the subsequent optimization of the flow channel structure design . Secondly, the method of using the theoretical analysis of the efficiency of the hydraulic motor of the pump as well as immersion oil for motor load torque calculation method of the oil clearance , analysis affect the efficiency and the load factor of the torque of the oil gap , suggest improvements . Finally, based on the principle of a hydraulic motor pump developed prototype experimental platform to test the principle of the hydraulic motor pump prototype and its testing device for testing and analysis , flow, pressure , volumetric efficiency , output power , and other performance parameters .
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