Sealing structure and lubricating oil sealing structure of gas turbine engine bearing seat

Abstract

The invention discloses a sealing structure of a sliding oil sealing structure of a bearing base of a gas turbine engine. The sealing structure is used for sealing a joint of a first part and a second part; the first butt-joint surface is formed on the first part; a second butt-joint surface is formed on the second part; the first butt-joint surface and the second butt-joint surface are separately inner conical surfaces or outer conical surfaces which can be matched and in butt joint; and a sealing gasket is tiled between the first butt-joint surface and the second butt-joint surface. The sealing structure can be used to achieve the relatively good sealing effect.

Description

technical field [0001] The invention relates to the technical field of sealing, in particular to a sealing structure and a lubricating oil sealing structure of a bearing seat of a gas turbine engine. Background technique [0002] In existing gas turbine engines and various gas turbines, due to the high speed of the rotor, the bearings installed on the rotor will heat up seriously, and the heat will affect the life of the bearings. In order to lubricate and cool the bearings, it is necessary to provide enough lubricating oil for the bearings to lubricate. cool down. It is necessary to rely on the oil pipeline to introduce the lubricating oil from the outside into the bearing seat, and the sealing design needs to be considered at the junction to prevent the lubricating oil from leaking from the junction. [0003] At present, the following methods are usually used to realize the sealing between the oil delivery pipe and the bearing seat: [0004] 1. Reference figure 1 As sho...

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Problems solved by technology

[0004] 1. Reference figure 1 As shown, a rubber ring 6 seal structure is designed between the outer wall of the oil delivery pipe 3 and the bearing seat 4, and the deformation capacity of the rubber ring 6 is used to seal; Low, generally can not exceed 400 degrees Celsius, the temperature in the turbine section of the engine is high, the temperature at the junction of the oil delivery pipe 3 and the bearing housing 4 can often reach above 500 degrees Celsius, at such a high temperature level, the apron 6 will carbonize and fail

[0005] Two, reference figure 2 As shown, a gasket 7 is designed between the mating end faces of the oil delivery pipe 3 and the bearing seat 4, and the gasket 7 is slightly deformed by the pressing force between the oil delivery pipe 3 and the bearing seat 4, thereby achieving a sealing effect; but the sealing structure of the end face gasket 7 : During use, the gasket 7 is often deformed and damaged, which affects the sealing effect. In addition, because the thickness of the engine support plate is limited, the sealing area of ​​the end face is small and the sealing effect is poor.

[0006] 3. Reference image 3 As shown, the oil delivery pipe 3 and the bearing seat 4 are welded together, and the gap between the two is blocked by solder to form a weld 8, so as to achieve the sealing effect; but after the oil delivery pipe 3 and the bearing seat 4 are welded together, the oil delivery pipe 3 and the Bearing seat 4 is integrated and cannot be disassembled, which is not conducive to later maintenance and repair

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