本文關(guān)鍵詞： 斜盤式軸向柱塞泵 泵軸 柱塞副 有限元分析 ANSYS-Workbench　出處：《西南交通大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以斜盤式軸向柱塞泵的關(guān)鍵零件部件—泵軸及柱塞副的變形及其對柱塞泵特性的影響為主要研究目標(biāo)。 通過對泵軸載荷系統(tǒng)的分析,確定徑向載荷對泵軸及柱塞泵性能有較大影響；采用MATLAB的SIMULINK工具箱建立泵軸徑向載荷仿真模型,對比分析柱塞泵主要性能參數(shù)對泵軸徑向載荷的影響發(fā)現(xiàn)：額定壓力、斜盤傾角及柱塞直徑對泵軸徑向載荷的大小有重要影響；以SIMULINK仿真結(jié)果為載荷條件,利用有限元分析軟件ANSYS-Work-bench對泵軸進行分析。通過靜結(jié)構(gòu)分析得到泵軸應(yīng)力應(yīng)變結(jié)果,并與理論分析進行了對比,兩者結(jié)果基本相同,經(jīng)校核,泵軸強度滿足使用要求,但是剛度卻超出了許用范圍,需要通過改善材料或者改進結(jié)構(gòu)來提高泵軸的剛度；基于靜結(jié)構(gòu)分析完成泵軸疲勞分析,得到泵軸循環(huán)壽命曲線、損壞、安全系數(shù)及雙軸應(yīng)力分布規(guī)律；通過模態(tài)分析算得其固有頻率和臨界轉(zhuǎn)速,為防止泵軸發(fā)生共振提供設(shè)計依據(jù)；完成泵軸諧響應(yīng)分析,得到交變載荷作用下泵軸的響應(yīng)規(guī)律。 本文同時利用ANSYS-Workbench對斜盤式軸向柱塞泵柱塞副變形進行了研究,分析計算了柱塞副在實際工作中的變形情況,完成柱塞副熱變形、壓力變形及熱壓耦合變形計算,得到變形后柱塞副間隙大小及形狀；推導(dǎo)出柱塞副泄漏量計算公式,利用所推導(dǎo)泄漏量計算公式及變形分析結(jié)果,分析計算了變形對柱塞副的泄漏及柱塞泵容積效率的影響,并與未考慮變形的情況進行了對比分析,變形后柱塞泵泄露較變形前有明顯的增加,導(dǎo)致柱塞泵的容積效率也有所下降。 通過軸向柱塞泵的泵軸在工作狀況下的應(yīng)力應(yīng)變及振動研究,為柱塞泵的泵軸設(shè)計、優(yōu)化及使用提供了有益的參考；對柱塞副變形及變形后的泄漏、容積效率的分析可為今后斜盤式軸向柱塞泵柱塞副的設(shè)計使用及柱塞泵性能維護提供依據(jù)。
[Abstract]:The main research object of this paper is the deformation of pump shaft and plunger pair and its influence on the characteristic of piston pump, which is the key part of inclined disc axial piston pump. By analyzing the load system of pump shaft, it is determined that radial load has great influence on the performance of pump shaft and piston pump, and the radial load simulation model of pump shaft is established by SIMULINK toolbox of MATLAB. By comparing and analyzing the influence of main performance parameters of piston pump on radial load of pump shaft, it is found that rated pressure, inclination angle of inclined disk and diameter of plunger have important influence on radial load of pump shaft. The pump shaft is analyzed by finite element analysis software ANSYS-Work-bench. Through static structure analysis, the results of stress and strain of pump shaft are obtained and compared with the theoretical analysis. The results are basically the same. After checking, the strength of pump shaft meets the requirements of application. However, the stiffness is beyond the allowable range, and the stiffness of the pump shaft should be improved by improving the material or the structure. Based on the static structure analysis, the fatigue analysis of the pump shaft is completed, and the cycle life curve of the pump shaft is obtained, which is damaged. Safety factor and biaxial stress distribution law; through modal analysis to calculate its natural frequency and critical speed to provide a design basis for preventing pump shaft resonance; complete pump shaft harmonic response analysis to obtain the response law of pump shaft under alternating load. At the same time, the deformation of plunger pair of inclined disc axial piston pump is studied by using ANSYS-Workbench. The deformation of plunger pair in practical work is analyzed and calculated, and the calculation of hot deformation, pressure deformation and coupled deformation of plunger pair is completed. The size and shape of the clearance of the plunger pair after deformation are obtained, the formula for calculating the leakage rate of the plunger pair is derived, and the effect of the deformation on the leakage of the plunger pair and the volume efficiency of the piston pump is analyzed and calculated by using the calculated formula of the leakage rate and the result of the deformation analysis. The results show that the leakage of the piston pump is obviously increased than that before deformation, which leads to the decrease of the volume efficiency of the piston pump. Through the research on stress strain and vibration of axial piston pump shaft under working condition, it provides a useful reference for the design, optimization and application of piston pump shaft. The analysis of volumetric efficiency can provide the basis for the design and use of plunger pairs of inclined disc axial piston pump and the performance maintenance of piston pump.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH322

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