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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...
Due to their compact and simple design, axial piston pumps are widely used in hydraulic systems. The piston/cylinder lubricating interface is one of the most critical design elements in axial piston pumps, which fulfills the bearing and sealing function simultaneously. Also it is the main source of both friction and volumetric powerloss. In order to realize the optimal design of efficient and reliable...
For the cylinder of the axial piston pump suffers complicated forces including hydraulic pressure force, mechanical forces and mutual coupling, which causes the cylinder fatigue damage with all forces whose fluctuation is caused by fluid striking on the cylinder of the pump cyclically, it is necessary to develop the fatigue analysis research. And the sensitive fatigue areas of the cylinder in the...
Axial Piston Pumps(APPs) have been widely used in industrial and mobile applications. To improve the operation performance, it is important to reduce pressure pulsations and noise level of APPs. The present paper, by analyzing the actual operating conditions in engineering point of view, proposes an iteration method of finding the reference operating conditions for designing valve plates in APPs with...
This paper analyses energy conversion and heat transfer in axial piston pump. According to it, the thermal mathematical model of axial piston pump is built by control volume method. This model can make full use of the dimension parameters of pump. The validity of the model is verified by the simulation for hydraulic system with axial piston pump. The result shows that this model can reflect and predict...
Aiming at the problem of multi-fault identification method of axial piston pump, a new method combining correlation dimension and support vector machine was proposed. Firstly, the envelope demodulation was performed to several typical fault vibration signals of pump by using wavelet packet decomposition and Hilbert transform method. Then, the useful signals corresponding to feature band were obtained...
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