Bearing supporting structure of double-rotor gas turbine engine

Abstract

The invention discloses a bearing supporting structure of a double-rotor gas turbine engine. The bearing supporting structure comprises a first rotating shaft and a second rotating shaft coaxially arranged in an inner cavity of the first rotating shaft, and further comprises a first bearing formed between the first rotating shaft and the second rotating shaft, and a second bearing arranged on the outer side of the first rotating shaft in a sleeving mode. The first rotating shaft and the second rotating shaft are erected on a bearing pedestal through the second bearing. The first bearing consists of a first high-pressure oil cavity and a third high-pressure oil cavity which are formed between the first rotating shaft and the second rotating shaft. The space between the first high-pressure oil cavity and the third high-pressure oil cavity, the two sides of the first high-pressure oil cavity and the two sides of the third high-pressure oil cavity are sealed through movable sealing rings. According to the bearing supporting structure of the double-rotor gas turbine engine, the number of existing engine force bearing frames can be reduced, and stable supporting is provided for the engine; and the bearing supporting structure is novel in design, the structure is simple, the stability is high, the service life is long, and application and popularization value is uniform and good.

Description

technical field [0001] The invention belongs to the technical field of gas turbine engines, and in particular relates to a bearing support structure of a double-rotor gas turbine engine. Background technique [0002] The gas generator of a two-rotor gas turbine engine, like a single-rotor engine, also includes a compressor, a combustor and a turbine. The difference is that a twin rotor engine has two rotors. The compressor of the twin-rotor engine is divided into two parts, the front is called the low-pressure compressor, and the back is called the high-pressure compressor; the entire turbine is also divided into front and rear parts, the front is called the high-pressure turbine, and the back is called the low-pressure turbine. The low-pressure compressor is connected with the low-pressure turbine to form a low-pressure rotor; the high-pressure compressor is connected with the high-pressure turbine to form a high-pressure rotor. There is no mechanical connection between t...

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Problems solved by technology

[0003] At present, the load-bearing system of the dual-rotor engine is mostly arranged in a separate form, which makes the force transmission path of the engine longer, and also makes the length of the whole engine longer, and the weight increase due to the extra load-bearing frame is more obvious , which is not conducive to the control of the weight of the whole machine

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