Axial sealing in a housing structure for a turbomachine

摘要

The housing structure has an outer housing wall (1) and inner housing wall (2) which annularly surround a flow channel (15) of the fluid flow machine and are spaced apart in a radial direction with respect to the flow channel. A cavity (11) is formed between the inner and outer housing walls. The axial seals (12-14) are configured to divide the cavity axially into two regions (16,17) so that different pressure conditions corresponding to pressure conditions in the flow channel are created according to an axial position of regions.