无背压活塞环的工作间隙和相对过盈量的设计计算

Design and calculation on work clearance and relative interference amount of non-backpressure piston rings

为使无背压活塞环正常工作并提高使用寿命,对工作间隙和相对过盈量的设计计算进行了研究。利用热变形分析推导出了热膨胀工作间隙计算式。通过力学分析对径向相对过盈量进行了设计计算,保证活塞环无背压。热膨胀工作间隙和径向相对过盈量的计算式可以指导无背压活塞环的设计、加工和装配。

The design and calculation on work clearance and relative interference amount were studied in order to make nonbackpressure piston rings work normally and to raise its life. The formula of thermal expansion work clearance was derived by thermal deformation analysis. Radial amount of relative interference was designed by mechanics analysis, which can ensure that piston ring has not backpressure. The formulas in the paper can help design, processing and assembling for non-backpressure piston rings.