A self-locking air duct

Abstract

The application belongs to the field of turbine air ducts, in particular to a self-locking air duct. The self-locking air duct of the present application, when assembling, first install the hook of the elastic lock ring in the elastic lock ring installation part of the high-pressure turbine rear journal, and rotate it at a certain angle to ensure that the elastic lock ring does not come out; through The tooling presses the first arc-end teeth of the elastic lock ring, and at the same time rotates the front section of the air duct, and tightens the air duct to the second limit part of the rear part of the air duct, and is close to the first limit part of the rear journal of the high-pressure turbine At this time, the elastic lock ring is released, and the elastic lock ring bounces forward by its elastic restoring force, and is clamped with the second arc end teeth of the rear section of the air duct, realizing the self-locking and positioning of the air duct. When decomposing the air duct, press the first arc-end teeth of the elastic lock ring through the tooling, and the arc-end teeth of the rear section of the air duct are separated from the arc-end teeth of the elastic lock ring, and the air duct is screwed out Remove and loosen the tooling at the elastic lock ring.

Description

technical field [0001] The application belongs to the field of turbine air ducts, in particular to a self-locking air duct. Background technique [0002] The air duct is a key part of the high-pressure turbine of the engine. It is usually a thin-walled structure. Its front end overlaps with the compressor rotor, and its rear end is installed on the rear journal of the high-pressure turbine to form an annular passage with the high-pressure turbine rotor and low-pressure turbine shaft. , leading the compressor air to the high-pressure turbine for sealing and cooling. [0003] The current air duct generally adopts a rear-to-front installation method, and the circumferential limit of the groove and the rear journal of the high-pressure turbine is designed, and then the nut is pressed to fix it axially. The structure is simple and easy to install and disassemble. In order to ensure the installation of the compression nut and take into account the requirements of the gas flow are...

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Problems solved by technology

The structure is simple and easy to install and disassemble. In order to ensure the installation of the compression nut and take into account the requirements of the gas flow area, the radial height difference L between the high-pressure turbine rear journal and the low-pressure turbine shaft must not be too small, but after the high-pressure turbine Existing air duct structures cannot be used if the journal and low-pressure turbine shaft cannot provide sufficient radial space

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