Fan casing

A fan casing and machining technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problem that the rotor blade tip is ground to the base of the fan casing, the offset position has no statistical regularity, and the upper edge of the stator is welded. The problem of impervious stress, etc., can shorten the processing time, reduce the probability of grinding the substrate, and avoid the welding stress.

A fan casing and machining technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problem that the rotor blade tip is ground to the base of the fan casing, the offset position has no statistical regularity, and the upper edge of the stator is welded. The problem of impervious stress, etc., can shorten the processing time, reduce the probability of grinding the substrate, and avoid the welding stress.

CN107542499AActive Publication Date: 2018-01-05AECC SHENYANG ENGINE RES INST
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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.

[0034] It should be noted that: in the drawings, the same or similar symbols represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, but not all of the embodiments. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] In describing the present invention, it is to be understood that...

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Abstract

The invention relates to the technical field of aero-engines and particularly provides a fan casing. A processing scheme of welding the casing with each stator blade is adjusted into a scheme that whole-ring stator blades with second outer rings are inserted into first outer rings, and welding and heat treatment processes are eliminated, so that the problems that the casing is deformed, the bodiesof the stator blades are misplaced, the axial length of a wear-resistant coating is insufficient due to a small axial clearance between a rotor and a stator, and the allowance of the casing is smalldue to a big margin plate are solved, and the vibration resistance of the casing is enhanced.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a fan casing. Background technique [0002] At present, the whole ring casing generally adopts welding type: special-shaped holes are milled on the thin-walled casing, and the special-shaped holes are matched with the small gap of the upper edge plate of the stator and then welded by electron beam welding, so that the structure is simplified. [0003] The traditional welded fan case has the following defects: [0004] 1. Since the upper edge plate of each stator blade is welded separately, there are many weld seams, and the upper edge plate of the stator is prone to impenetrable welding or excessive stress, and cracks are prone to occur; [0005] 2. After the welding and heat treatment of the stator blades, the actual angular and axial positions of the blade body deviate from the theoretical position, the overall shrinkage of the casing and the flow path data deviate, which...

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Application Information

Patent Timeline
05 Jan 2018
Publication
CN107542499A
IPC
F01D9/04; F01D25/00
Inventors
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