| 摘要 |
PURPOSE: A seal is provided to improve the tensile strength by compressing the inner ring in advance with the outer ring with the higher tensile strength and the thermal expansion coefficient equal to the inner ring. CONSTITUTION: A composite seal face ring(100) has an inner ring(60) made of material with good tribological properties. The inner ring is pre-compressed by an outer ring(64) with the high tensile strength and the thermal coefficient of expansion substantially equal to the thermal coefficient of expansion of the inner ring. The seal face ring is assembled by compressing the inner ring or expanding the outer ring with fluid under pressure before inserting the inner ring into the outer ring. The inner ring and a carrier(112) are sealed to platens(102,104), and hydraulic fluid is applied to a chamber(116) in the outer bore of the inner ring. |
