共查询到18条相似文献,搜索用时 156 毫秒
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提出了一种新型静止叶片式空气压缩机,该压缩机具有一个做摆动运动的转子和一个静止不动的叶片,叶片的外端与气缸的内孔壁面密封紧固连接,叶片的侧端与端盖密封紧固连接,借此减少了气体直接从压缩腔向吸气腔窜逸的通道,有效地消除了压缩机在这些部件间的泄漏损失和摩擦损耗。介绍了压缩机的结构特点及工作原理,建立了压缩机的数学模型。研究表明:转子的扭摆惯性力矩对滑块与叶片运动副的摩擦及磨损有较大影响,应减小转子的转动惯量以降低滑块与叶片间的接触力;转子与端盖的轴向间隙对压缩机内部泄漏损失十分敏感,应采取轴向密封措施以减少转子轴端处的泄漏量。 相似文献
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针对传统滑片式压缩机存在较大摩擦损失的缺陷,设计了一种平动转子式压缩机,该压缩机的最大特点是转子采用平动转动的运转方式,与传统滑片式压缩机相比其主要运动副如转子与气缸、转子与端盖、滑片与缸孔之间的相对运动速度要小很多,因此它具有较少的摩擦和磨损.介绍了该类压缩机的工作原理和结构特点,推导并分析了滑片相对于缸孔的滑移速度,最后讨论了该类压缩机的结构设计要点. 相似文献
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提出并分析了一种新型叶片式汽车空调压缩机 ,该压缩机内有一个旋转缸筒、一个嵌固式的隔离叶片和 2个随动端盖 ,其最大特点在于从根本上解决了隔离叶片外端与缸孔内壁面之间、以及隔离叶片侧端与密封端盖之间的摩擦和泄漏的问题 ,而且还增大了压缩机的有效进气角度。 相似文献
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提出并分析了一种新型叶片式汽车空调压缩机,该压缩机内有一个旋转缸筒、一个嵌固式的隔离叶片和2个随动端盖,其最大特点在于从根本上解决了隔离叶片外端与缸孔内壁面之间、以及隔离叶片侧端与密封端盖之间的摩擦和泄漏的问题,而且还增大了压缩机的有效进气角度。 相似文献
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针对目前滚动活塞式压缩机存在内部泄漏损失多和运动件摩擦损失大的缺陷,提出一种新型全封闭旋转式空调压缩机,该机采用新颖的减摩技术和密封结构,将叶片、端盖与旋转式的缸套紧固连接在一起并同步旋转,消除了这些部件之间的配合间隙,改善了它们之间的摩擦与泄漏状况。介绍了该类压缩机的工作原理和结构特点,探讨了将其作为房间空调器压缩机的设计思路。与传统滚动活塞式压缩机相比,新型旋转式压缩机在减摩、密封、消振、制造以及装配等方面确有其独特之处。 相似文献
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R. I. Lewis 《International Journal of Mechanical Sciences》1980,22(9):535-549
Turbomachine rotors viewed relative to rotation experience a relative eddy. The relative eddy component normal to the blade to blade flow, responsible for slip and for coriolis blade forces in mixed-flow turbomachines, is well known. The remaining eddy component which lies in the through-flow direction, is generally ignored in quasi-two-dimensional design methods. This paper presents the first stage of an analytical method for predicting the influence of the through-flow eddy in axial, mixed-flow or radial machines. 相似文献
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由于螺杆转子粗铣过程中,不同部位刀片加工余量差别巨大,存在刀片磨损不均匀的难题,降低了转子的加工精度与效率。为此,依据刀片全生命周期算法,提出增加磨损严重部位铣刀盘的刀片数量,使刀片的生命周期尽量一致的铣刀设计方法,以减少刀片更换次数、提高转子加工精度。与无锡压缩机厂合作,以圆弧转子型线为研究对象,设计了双螺杆压缩机转子刀具。其加工实验结果表明:多刀片螺杆转子粗铣刀粗糙度Ra=12.5μm,符合螺杆转子加工精度要求,铣刀刀片更换时间间隔延长了一倍,证明了该刀具设计方法的合理性。 相似文献
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Yi-Jui Chiu Xiao-Yun Li Guo-Fei Yu Chia-Hao Yang Jeng-Shyang Pan Chin-Ling Chen 《Journal of Mechanical Science and Technology》2020,34(2):521-530
This paper uses new deductions of the equation of motion and obtains new modes of change that differ from the authors’ previous research. The blade-bending, shaft-torsion and ring-bending coupled vibration influence of a single-disk rotor whose blade subsystem was coated with a ring is investigated. In the last two years, the authors adopted two methods, the assumed mode method and finite element method, and compared both parties results. This article continues that work. In this paper, the phenomena of ring joint coupling vibrations are different and interesting. The authors defined two new types, the shaft-blade-ring (SBR) and blade-ring (BR) modes. These two coupling modes can be mutually affected by the shaft, blade, and ring, and no single subsystem predominates. The new change rules of natural frequencies of rotors with two to 15 blades and those of mode shapes are discussed. The influence of the ring thickness and rotational speed are also studied in this paper. 相似文献
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转子-滑动轴承非线性行为研究综述 总被引:2,自引:0,他引:2
对轴承非线性油膜力模型进行了总结,综述了当前油膜力导致转子非线性行为的研究成果,讨论了该问题及油膜力和转子的建模研究中存在的不足,展望了该问题研究的发展趋势。 相似文献
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通过前掠、后掠以及径向小型轴流风扇转子流场的数值分析,研究了掠动叶对转子气动及声学特性的影响及其作用机理,并给出了由转子尾缘旋涡脱落而诱发的紊流噪声压值分布,该分布说明了前掠动叶提高了转子的声学特性。 相似文献
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Seunghoon Lee Soogab Lee Jaeha Ryi Jong-Soo Choi 《Journal of Mechanical Science and Technology》2013,27(2):413-420
To reduce airfoil self-noise from a 10 kW wind turbine, we modified the airfoil shape and planform of a wind turbine blade. To obtain the optimal blade design, we used optimization techniques based on genetic algorithms. The optimized airfoil was first determined based on a section of the rotor blade, and then the optimized blade was designed with this airfoil. The airfoil self-noise from the rotor blades was predicted by using a semi-empirical model. The numerical analysis indicates that the level of the airfoil self-noise from the optimized blade is 2.3 dB lower than that from the baseline blade at the rated wind speed. A wind tunnel experiment was also performed to validate the design optimization. The baseline and optimized rotors were scaled down by a factor of 5.71 for the wind tunnel test. The experimental results showed that airfoil self-noise is reduced by up to 2.6 dB. 相似文献