GEOMETRICAL MODEL OF SCROLL COMPRESSOR CHAMBER BASED ON GENERAL PROFILE

QIANG Jianguo  LIU Zhenquan

(School of Mechano-Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050)

Abstract: The scroll compressor chambers are classified a-type and b-type by its types of pitch line, its length, width and normal area are defined. Using analytical method, the geometrical model that synthesized the profile, form, deformation, lifecycle and the living numbers of scroll compressor chambers is established. The geometric characteristics of scroll compressor chambers, such as length, width, area, volume, center of mass and curvature radius of mesh point are analyzed. The established geometrical model could demonstrate the forming, deforming and vanishing process, so all geometric characteristics of scroll compressor chambers can be overall analyzed which could serve as the foundations of scroll chmaber’s researches on geometry, kinematics, dynamics, thermodynamics, simulation and design. The changes for Ⅲ−type profile compressor chambers are too complex, the deformation and dynamics characteristics for Ⅱ−type profile compressor chambers are more steady, the deformation efficiency for Ⅰ−type profile compressor chambers is high and it is easy to machining. Consequently based on Ⅰ−type profile, the hybrid profile modified in centric meshing part by Ⅱ−type profile is well adopted in practice.

Key words: Scroll Compressor Scroll compressor chamber General profile Geometrical model

CLC No: TH455

教育部博士点基金资助项目(2005731002). Received 20060611, received in revised form 20070115