Self-locking air duct

Abstract

The invention belongs to the field of turbine air ducts, and particularly relates to a self-locking air duct. According to the self-locking air duct, during assembly, firstly, a hook of an elastic locking ring is mounted in an elastic locking ring mounting part of a rear journal of a high-pressure turbine and rotated by a certain angle, so that the elastic locking ring is not disengaged; first arcend teeth of the elastic locking ring are pressed through a tool, and meanwhile, the front segment of the air duct is rotated so that the air duct is screwed until the second limiting part of the rear segment of the air duct is tightly attached to the first limiting part of the rear journal of the high-pressure turbine; and at the moment, the elastic locking ring is loosened and bounces forwardsthrough the elastic restoring force of the elastic locking ring to be clamped with second arc end teeth at the rear segment of the air duct, so that the self-locking and positioning of the air duct are realized. When the air duct is disassembled, the first arc end teeth of the elastic locking ring are pressed through the tool, the arc end teeth of the rear segment of the air duct are separated from the arc end teeth of the elastic locking ring, the air duct s screwed out and taken down, and the tool at the elastic locking ring is loosened.

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...

AI Technical Summary

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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