Assembling method of stator blade ring segment, stator blade ring segment, coupling member, welding method

Abstract

An assembling method of a stator blade ring segment which can suppress the risks of thermal deformation and deterioration of strength, secure a degree of freedom of profile, and enhance the compression performance of a compressor. Furthermore, welding is provided in which a welding object can be prevented from floating from a groove or a recess at the time of welding, and welding can be carried out well. Sidewall portions (50b) on the opposite sides are formed to incline against the bottom (50a) so that the width of a groove (50) formed in each segment split body (41) decreases gradually from the outer circumferential side toward the bottom(50a). A coupling member (42) has such a cross-section that its width becomes largest at a protrusion (42b) located at an intermediate part in the thickness direction. When the coupling member (42) is placed in the groove (50), the protrusions (42b) on the opposite sides abut against or approach the sidewall portion (50b) of the groove (50), a space (100) is formed on the bottom (50a) side of the groove (50) and a groove (200) of substantially V-shaped cross-section is formed on the side away from the bottom (50a) of the groove (50).

Description

technical field [0001] The present invention relates to an assembly method of stator blade ring pieces constituting a stator blade ring of an axial flow compressor, a stator blade ring piece, a coupling part and the like. Background technique [0002] The stator blade ring of the axial flow compressor is configured by arranging a plurality of, for example, tens to hundreds of stator blades in the circumferential direction. [0003] In the past, the method of assembling the stator vane ring was often used, that is, the stator vane was inserted between the inner fender and the outer fender forming the compartment wall and temporarily assembled, and the stator vane was inserted from the inner fender and the outer fender. Electron beam welding is performed on the side surfaces of the plates in a circumferential shape to join both end portions of the stator blades to the inner baffle and the outer baffle (see Patent Documents 1 and 2). [0004] Patent Document 1: (Japanese) Japa...

AI Technical Summary

Problems solved by technology

Stator blades and baffles may deform due to this heat

If the stator blades are strained, the air flow in the cabin is disturbed, resulting in a reduction in the compression efficiency of the compressor

In addition, if the baffle is strained, for example, the inner surface of the baffle undulates and bulges toward the interior of the vehicle or conversely sags.

As a result, a step is generated between the inner surface of the casing of the compartment and the inner surface of the baffle, and the air flow in the compartment is disturbed, resulting in a decrease in the performance of the compressor.

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