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The fixed scroll of the scroll compressor is usually immovable, and the deformation of the scrolls may lead to the operation stuck, which may be avoided by designing the fixed scroll as floating one. However, the introduction of floating fixed scroll will inevitably cause the variation of the dynamic characteristics, so it is necessary to establish a simulation model to explore the influence of floating fixed scroll. In this study, a tribo-dynamics model considering floating fixed scroll is established, which couples the key friction pairs composed of fixed scroll, orbiting scroll and frame to reveal the influence of floating scroll on tribological and dynamics performance. The variation of the lubricant viscosity and boundary pressure as well as the deformation of components are included in the model to consider the real working conditions. The results show that compared with the fixed scheme, the floating scheme provides a compensation space for the components deformation, which is conducive to the operation stability; The floating scheme can not only ensure the sealing of the compression chamber, but also reduce the friction work by 53% compared with the fixed clearance of 4µm. [ABSTRACT FROM AUTHOR]

The Oldham's ring is a key component to prevent the orbiting scroll from rotating, and the complex working conditions make its keys wear, which seriously affect the reliability of the scroll compressor. In order to simulate the real working state and explore the wear reduction scheme of the Oldham's ring, an 8 degrees of freedom (DOF) tribo-dynamics model with multi-component coupling is established in this study, and the variations of lubricant viscosity, boundary pressure and the deformation of components are considered. The results show that the quadratic-function profile of the Oldham's ring keys significantly affects its dynamics properties, and the profile with a height of 3 µm can reduce the wear by 59% compared with no profile. [ABSTRACT FROM AUTHOR]