低噪声变量轴向柱塞泵的分析-机械电子工程专业论文.docxVIP

哈尔滨工业大学工程硕士学位论文 哈尔滨工业大学工程硕士学位论文 - - II - Abstract With the rapid development of hydraulic power transmission technology, the noisy issue of hydraulic system becomes more and more serious. In the hydraulic system, the noise and the degree of transmission noise of the components are different; among them, the maximum noise is hydraulic pump which provides pressure and flow for the hydraulic system. So far, the axial piston pump is the most important in various volume hydraulic pumps for the advantages of high power density, high volume efficiency, large transmission power, and easy regulation of the displacement. At the same time, the noise of the axial piston pump is also larger compared with other hydraulic pump. The noise of the axial piston pump is mainly caused by the periodic change of pump pressure, flow, and cavitation. When the axial piston pump works, the pressure and flow changes periodically, which produce periodic pressure fluctuation, causing hydraulic vibration that spreads to the whole system. At the same time, resonance and noise are produced by the pressure reflex in the hydraulic circuit of pipeline and valve. Now more attention has been paid to noise pollution; therefore, reducing the noise of the axial piston pump has a positive and far-reaching significance. This paper focuses on making a comprehensive and detailed study of low noise axial piston pump. Firstly, this paper gives the overall design of the low noise axial piston pump, including piston, slipper, spring, swash plate, cylinder, and valve plate; based on which, the stress and strength of the key components are analyzed and checked. Secondly, kinematics of low noise axial piston pump is simulated, and the model of the flow and pressure of low noise axial piston pump is established; and then, analysis the pulse of flow and pressure of the low noise axial piston pump are analyzed and then the modal of pump’s shell is simulated. The vibration of the low noise axial piston pump is also studi