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.

涡旋压缩机的固定涡旋件通常是不动的，涡旋件的变形可能导致运行卡住，将固定涡旋件设计成浮动式可以避免这种情况。但浮动定涡旋的引入必然会引起动力特性的变化，因此有必要建立仿真模型来探究浮动定涡旋的影响。在这项研究中，建立了一个考虑浮动固定涡旋的摩擦动力学模型，该模型耦合由固定涡旋、轨道涡旋和框架组成的关键摩擦副，以揭示浮动涡旋对摩擦学和动力学性能的影响。润滑剂粘度和边界压力的变化以及部件的变形都包含在模型中，以考虑实际工作条件。结果表明，与固定方案相比，浮动方案为构件变形提供了补偿空间，有利于运行稳定性；浮动方案不仅能保证压缩室的密封性，而且与4µm的固定间隙相比，摩擦功减少了53%。