叶片铰接滚动转子压缩机的运动分析

介绍了新型叶片铰接滚动转子压缩机的结构特点,与传统滚动转子压缩机相比,具有摩擦功耗少,径向泄漏少等优点,具有相当的优势和发展前景.但是,在叶片铰接滚动转子压缩机的试制初期,发现转子及滚动环有易烧与卡死的现象,为此对叶片铰接滚动转子压缩机进行了运动分析.通过运动分析发现这种叶片铰接滚动转子压缩机存在急回运动的特性,是转子和滚动环烧缸与卡死的主要原因.因此,在结论中提出了相应的注意事项和应对策略.     

叶片铰接滚动转子压缩机主要零部件的强度分析

新型叶片铰接滚动转子压缩机在做压缩机耐久性试验时,当速度提高到5500r/min时,出现铰接支座铰接槽倒角处很快破裂的损坏现象,严重影响压缩机的机械性能、使用寿命和可靠性.本文通过利用有限元分析软件ANSYS对叶片铰接滚动转子压缩机的隔离叶片和铰接支座等主要运动部件进行了静态强度分析,结合以前的运动分析和耐久性试验,找到原因所在,提出了相应的改进措施,耐久性试验的结果表明改进措施有效可行.     

新型铰接叶片式旋转压缩机的结构与原理

介绍一种包含有旋转缸套和铰接隔离叶片的新型旋转式压缩机的结构及其工作原理,该压缩机不仅继承了传统滚动活塞式旋转压缩机体积小、重量轻和制造工艺简单的优点,而且与之相比还具有更小的振动和更低的摩擦损耗,因而是一种较有实用前景的新型旋转式压缩机.     

叶片铰接滚动转子压缩机结构特点及工作原理

提出了一种叶片铰接滚动转子压缩机结构型式，并通过与传统结构型式的滚动转子压缩机进行对比，分析了这种压缩机的结构特点，随后阐述了其工作原理，该结构压缩机样机经性能测试，结果基本令人满意。     

低振动低摩擦铰接叶片式旋转压缩机的研究

介绍一种新型铰接叶片式旋转压缩机的结构和工作原理 ,对其运动机构进行了理论分析。研究表明 ,该压缩机比传统的滚动活塞式压缩机具有更低的振动噪声、更小的摩擦损耗以及更少的泄漏损失 ,是一种有实用前景的旋转式压缩机     

嵌铰叶片式汽车空调压缩机的结构和原理

介绍一种新型叶片式汽车空调压缩机的结构及其工作原理 ,该压缩机包含有一个旋转缸套 ,一个嵌固叶片式和一个铰接叶片式 ,它不仅继承了传统叶片式汽车压缩机结构简单和高速运转平稳的优点 ,而且与之相比还具有较低的摩擦损耗和较少的泄漏损失。     

双联平动转子式压缩机的结构探讨

介绍一种新型压缩机的工作原理和结构特点,该压缩机具有一对双联转动的转子并用一个叶片将它们连接在一起,转子及叶片均采用平动转动的工作方式,其主要运动副如转子与气缸、转子与端盖、叶片与端盖的相对运动速度比较小,因此压缩机的摩擦和磨损亦较小。对压缩机的结构工艺要点及运动学特点进行了探讨,为该类装置的设计提供了良好的基础。     

滚动转子式压缩机气缸的降高减隙设计及变形测试

为提高滚动转子式压缩机效率,减少制冷设备的能源消耗。依据压缩机理论分析及流动建模,确定采用降低压缩机气缸高度的方式减小滚套径向间隙,进而减少泵体内冷媒气体泄漏,达到提升效率的目的。同时分析由此会带来的影响,并通过仿真建模及形变试验加以验证。因叶片槽为气缸内部的非对称结构,降低气缸高度会明显影响气缸叶片槽形变,为此需要依据仿真及试验结果,及时调整泵体间隙设计,避免因摩擦增大造成压缩机功率增加,甚至压缩机泵体锁死。     

嵌铰叶片式汽车空调压缩机的结构和原理

介绍一种新型吉片式汽车空调压缩机的结构及其工作原理,该压缩机包含有一个旋转缸套,一个嵌固叶片式和一个铰接叶片式,它不仅继承了传统叶片式汽车压缩机结构简单和高速运转平稳的优点,而且与之相比还具有较低的摩擦损耗和较少的泄漏损失。     

静止叶片式空气压缩机的研究

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。     

一种低摩擦低泄漏新型旋转式空调压缩机的设计与分析

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。     

Lubrication characteristics between the vane and the rolling piston in a rotary compressor used for refrigeration and air-conditioning systems

The rolling piston type-rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness and high-speed operation. The present analysis is part of a research program directed toward maximizing the advantages of refrigerant compressors. The study of lubrication characteristics in critical sliding components is essential for the design of refrigerant compressors. Therefore, theoretical investigation of the lubrication characteristics of a rotary compressor used for refrigeration and air-conditioning systems was studied. The Newton-Raphson method was used for the partial elastohydrodynamic lubrication analysis between the vane and the rolling piston of a rotary compressor. The results showed that the rotational speed of a shaft and the discharge pressure significantly influence the friction force and the energy loss between the vane and the rolling piston.     

The Influence of the vane on the lubrication characteristics between the vane and the rolling piston of a rotary compressor

The rolling piston type rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness and high-speed operation. The present analysis is part of a research program directed toward maximizing the advantages of refrigerant compressors. The study of lubrication characteristics in the critical sliding component is essential for the design of refrigerant compressors. Therefore, theoretical investigation of the lubrication characteristics of a rotary compressor being used for refrigeration and air-conditioning systems was investigated. The Newton-Raphson method was used for a partial elastohydrodynamic lubrication analysis between the vane and the rolling piston of a rotary compressor. The results demonstrated that the vane thickness and the center line position of the vane significantly influenced the friction force and the energy loss between the vane and the rolling piston.     

Lubrication characteristics of a rotary compressor used for refrigeration and air-conditioning systems (the influence of alternative refrigerants)

The rolling piston type rotary compressor has been widely used for refrigeration and air-conditioning systems due to its compactness and high-speed characteristics. However, it is necessary to develop alternative refrigerants that can guarantee environmental protection. In addition, advanced refrigerant compressors must be further developed to overcome the compatibility problems inherent in refrigeration and air-conditioning systems. The refrigerant compressor is the most important mechanical component, which determines the performances of refrigeration and air-conditioning systems. Therefore, we theoretically investigated the lubrication characteristics of the rotary compressor currently used in both refrigeration and air-conditioning systems with an alternative refrigerant. In the theoretical investigation, the Runge-Kutta method is used to analyze the behavior of a rolling piston in the rotary compressor. Subsequently, the Newton-Raphson method is used, which provided good performance in the analysis of the elastohydrodynamic lubrication of the line contacts between a rolling piston and a vane in the rotary compressor. The results demonstrate that the alternative refrigerants influence the friction force and the energy loss between the vane and the rolling piston.     

Numerical analysis of the piston secondary dynamics in reciprocating compressors

In this study, a numerical analysis for the piston secondary dynamics of small refrigeration reciprocating compressors is performed. In general, the length of cylinder in this class of compressors is shortened to diminish the frictional losses of the piston-cylinder system. So, the contacting length between piston and cylinder wall is in variable with the rotating crank angle around the BDC of the reciprocating piston. In the problem formulation of the piston dynamics, the variation in bearing length of the piston and all corresponding forces and moments are considered in order to determine the piston trajectory, velocity and acceleration at each step. A Newton-Raphson procedure was employed in solving the secondary dynamic equations of the piston. The developed computer program can be used to calculate the entire piston trajectory and the lubrication characteristics as functions of crank angle under compressor running conditions. The results explored the effects of some design parameters and operating conditions on the stability of the piston, the oil leakage, and friction losses.     

A numerical analysis of the interaction between the piston oil film and the component deformation in a reciprocating compressor

The piston secondary motion significantly influences the major characteristics of lubrication in a reciprocating compressor, such as the oil leakage, the piston slap phenomenon and the frictional power loss. Therefore, the design parameters governing piston dynamics should be carefully determined based upon a reliable dynamic characteristic investigation. As a preliminary research step, this paper is concerned with the finite element analysis for the piston dynamic response. By coupling FDM for the lubricating pressure field with FEM for the piston dynamic motion, we numerically approximate the lubricant–structure interaction in a reciprocating compressor. Numerical results illustrating the theoretical work are presented.     

Numerical Analyses of Hydrodynamic Lubrication and Dynamics of the Rolling Piston and Crankshaft in a Rotary Compressor

In this article, numerical analyses of hydrodynamic lubrication and dynamics of the crank, rolling piston, and vane were carried out to study the tribological performance of a rotary compressor. Dimensionless Reynolds equations of journal and thrust bearings in dynamic load condition were derived and solved numerically. To deal with the lubrication of the rolling piston, the effect of the nonuniformity of tangential velocity over the bearing surface on the Reynolds equation was taken into account. In addition, combined with the analyses of dynamics and kinematics of the crank, piston, and vane, the angular velocities of the crank and piston as well as the motion mode between the piston and vane were studied. Analysis results illustrate characteristic oil film pressure distributions of the crank and piston bearings, which are different from that of common journal bearings. Under the influences of dynamic load and eccentricity of the cam, the wedge effect as well as the stretch and squeeze effect contribute greatly to hydrodynamic pressure. The relative motion mode between the piston and vane tip is not always pure sliding but accompanies rolling in some cases, which depends on the magnitude of the friction coefficient between the piston and vane tip. The analysis results are helpful for the improvement of rotary compressor design.