斜盘式变排量压缩机机构动力学的分析与改进

发布时间：2018-06-28 17:41

本文选题：噪声振动 + 变排量压缩机　；参考：《合肥工业大学》2016年硕士论文

【摘要】：斜盘式变排量汽车空调压缩机可以在汽车发动机任何转速下根据车内温度自动调节压缩机的排量,其效率和舒适性明显优于定排量压缩机,因此中高档轿车空调系统越来越多的采用斜盘式变排量压缩机,斜盘式变排量压缩机的噪声振动问题因此引起越来越多的关注。根据相关标准对标准原装和几种不同结构下的6SE16型斜盘式变排量压缩机进行噪声振动性能系列试验,试验得到的振动噪声数据说明此压缩机在空转不工作状态下的噪声偏大,有时甚至大于压缩机稳定工作状态下的噪声。经过进一步分析发现,压缩机机械方面的噪声包括来自活塞滑履之间的摩擦冲击、主轴斜盘结构的动不平衡以及进排气阀片。针对压缩机的动不平衡是其噪声源之一,计算整个压缩机的动不平衡,根据压缩机的总动不平衡量随斜盘倾角变化的特点,选择合适的优化目标函数、优化参数和优化算法对压缩机的动不平衡进行优化改善。根据优化结果对压缩机的驱动盘和斜盘毂这两个零部件的质量和质心位置进行实际改善,对比改善前、后的压缩机噪声振动数据表明动不平衡改善后的压缩机整机的噪声振动值有明显降低。对压缩机进行动力学仿真,仿真得到的左、右轴承的受力与理论计算值十分吻合,表明压缩机的动力学仿真可以用于计算压缩机的动不平衡性能。对新结构的压缩机进行动平衡仿真分析能够验证设计前后动平衡的优劣,显著提高设计改善工作的效率,节约成本。依据理论计算将活塞气体力在Adams中实现,仿真各个零部件之间的相互作用力,为下一步压缩机的机构改善分析做铺垫,为我们在结构设计、零件设计中提供指导意见。
[Abstract]:The oblique disc variable displacement automobile air conditioning compressor can automatically adjust the displacement of the compressor according to the internal temperature at any speed of the automobile engine, and its efficiency and comfort are obviously superior to that of the constant displacement compressor. Therefore, more and more high-grade car air conditioning systems adopt oblique disc variable displacement compressor, and the noise vibration of tilted disc variable displacement compressor has attracted more and more attention. According to the relevant standards, a series of tests on the noise and vibration performance of 6SE16 type oblique disc variable displacement compressor with different structures are carried out according to the relevant standards. The vibration and noise data obtained from the test show that the noise of the compressor is on the high side under the condition of idling non-working. Sometimes it is even greater than the noise in the stable state of the compressor. Through further analysis, it is found that the mechanical noise of the compressor includes the friction impact between the piston sliders, the dynamic unbalance of the spindle tilting disk structure and the intake and exhaust valve blades. In view of the fact that the dynamic unbalance of compressor is one of its noise sources, the dynamic unbalance of the whole compressor is calculated. According to the characteristic that the total dynamic unbalance of compressor varies with the inclination angle of the inclined disk, the appropriate optimization objective function is selected. The dynamic unbalance of compressor is optimized and improved by optimizing parameters and algorithms. According to the optimization results, the quality and center of mass of the two parts, the drive disk and the inclined disc hub of the compressor, are improved in practice. The noise vibration data of the compressor show that the noise vibration value of the compressor is obviously reduced after the dynamic unbalance is improved. The dynamic simulation of the compressor shows that the forces of the left and right bearings are in good agreement with the calculated values, which indicates that the dynamic simulation of the compressor can be used to calculate the dynamic unbalance performance of the compressor. The dynamic balance simulation analysis of the compressor with new structure can verify the merits and demerits of the dynamic balance before and after the design, improve the efficiency of the design improvement and save the cost. According to the theoretical calculation, the piston gas force is realized in Adams, and the interaction between the parts and components is simulated, which will pave the way for the improvement and analysis of the mechanism of the compressor in the next step, and provide guidance for us in the structural design and the design of the parts.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.851

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