FASTENING OF THE INTERNAL SKINS IN THE EXHAUST SYSTEM FOR THE GAS PUMPING UNIT Russian patent published in 2023 - IPC F02C7/24 F01D25/30 F16L59/14 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to gas turbine technologies and can be used for creation of new and reconstruction of existing installations and machine complexes, where gas turbine engines (GTE) of an aircraft or other type are used as a power drive, for example, gas compressor units (GPA) of compressor stations on main gas pipelines. Objective of the invention: providing temperature compensation and reducing heat transfer between skins. The solution of these problems is achieved by fastening the inner lining in the exhaust system for a gas-compressor unit, containing an outer load-bearing skin and an inner non-load-bearing skin, by installing a layer of thermal insulation between the inner non-bearing skin and the outer load-bearing skin, with the studs welded to the outer load-bearing skin and connected to the inner non-load-bearing sheathing through the installed pin connections, which enables keeping the internal non-load-bearing sheathing in its plane during the operation of the GPA, excluding the transfer of force arising from thermal expansion to the external load-bearing sheathing and further reducing heat transfer between the sheaths. The welding of the studs can be done by arc welding or gas welding, resistance welding or capacitor welding. Horizontal or vertical slots and/or holes may be provided on the inner non-loadbearing skin. Inside, triangular plates pieces can be welded to the studs and the outer load-bearing skin. Plate pieces can be made in form of plates with an angle at the top from 15 to 75° and their height H is 0.1…0.6 of the thickness of the thermal insulation -δ_ins. In places of welding, the studs can be bent in form of the letter L and welded to the outer load-bearing skin with bent ends. The pin connection of the inner non-load-bearing skin can be made in form of support and/or pressure washers. Support and/or clamping washers can be made the same in size. The pressure washers may be circular in shape. The support washers may be circular in shape. The diameter of the studs and nuts can be made in the range from 6 to 24 mm. Nuts and studs can be made of carbon steel or stainless heat resistant and heat resistant steel. Insulation may be provided between the outer load-bearing skin and the inner non-load-bearing skin. The pinned connection of the inner non-load-bearing skin can be made through support and/or clamping nuts.

EFFECT: provision of temperature compensations and reduction of heat transfer between skins.

14 cl, 19 dwg