METHOD FOR MAKING THIN-WALL SEAMLESS LINER FOR COMPOSITE TANKS MADE FROM TITANIUM ALLOYS AND LINER MADE USING SAID METHOD Russian patent published in 2016 - IPC F17C1/00 B21D51/24 B22F3/15 B22F5/00 

FIELD: aviation.

SUBSTANCE: present invention relates to aircraft engineering, rocket and space engineering, particularly to liners that are used in high pressure cylinders. Method for making thin-wall seamless liner for composite tanks made from titanium alloys involves filling granules of high-strength titanium alloy into a metal capsule. After filling a capsule with granules vibration compaction and heating are stopped, the capsule with granules is sealed by an electron beam and removed into the air, and then they are checked for tightness. After checking, the evacuated granules in capsule are subjected to hot isostatic pressing, after which the obtained as a result of compacted capsule of liner billet is lowered into the vessel with solution of acids to dissolve the outer and inner shells, after that a thin-wall seamless liner from high-strength titanium alloy is removed from the solution of acids and checked for compliance with the geometrical parameters. Thin-wall seamless liner for composite tanks made from titanium alloys consists of a cylindrical shell, two bottoms which are located on one axis and coupled, so that the cylindrical shell is located between the two bottoms of the liner. Two flanges, each is coupled with one of the bottoms of the liner. There is a hole at the central axis of each flange; the cylindrical shell, bottoms and flanges are connected into a single, monolithic and equally strong structure without welds and connections.

EFFECT: higher reliability, reduced weight, higher strength and service life with increased complexity of configuration and minimum machining of the liner.

8 cl, 1 dwg