Composite material stator blade for engine

Abstract

The invention discloses a composite material stator blade for an engine, comprising a composite material molded part including an outer edge plate, a working surface and a non-working surface large cloth, an intermediate layer, an inner edge plate, a nickel edging and a bushing; the working surface and the non-working surface large cloth include 2 layers of glass cloth prepreg large cloth ply and 6 layers of carbon fiber cloth prepreg large cloth ply; the intermediate layer is formed by laying 11 layers of non-working surface carbon fiber cloth prepreg intermediate ply and 11 layers of working surface carbon fiber cloth prepreg intermediate ply, the outer edge plate is formed by laying the outermost 2 layers of glass cloth prepreg outer edge outer ply, the middle 19 layers of carbon fiber cloth prepreg outer edge middle ply and 41 layers of carbon fiber cloth prepreg small cloth outer edge inner ply; the inner edge plate is formed by laying 2 layers of glass cloth prepreg inner edge outer ply and 8 layers of carbon fiber cloth prepreg inner edge inner ply. The invention has light weight, long service life and high reliability.

Description

Technical Field

[0001] The invention belongs to the field of engine blade manufacturing and relates to a composite material stator blade for an engine. Background Art

[0002] The fan parts of existing turbofan engines are all made of metal materials, which are overweight. In order to further improve the efficiency of turbofan engines, meet the design requirements of low fuel consumption of engines, and improve the market competitiveness of large passenger engines, engine weight reduction has become one of the main goals of major passenger engine manufacturers. Due to the advantages of composite materials in specific strength and specific stiffness, it is an effective method and means for major engine manufacturers to improve engine thrust-to-weight ratio and reduce engine weight. Therefore, in order to reduce the weight of fan units, it is very important to study the stator blades of composite materials. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a composite material stator blade for an engine which is light in weight, has a long service life and has high reliability.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a composite material stator blade for an engine, comprising a composite material molded part, a nickel edging and a bushing wrapped around the leading edge and the trailing edge of the composite material molded part; the composite material molded part comprises an outer edge plate, a working surface large cloth, a non-working surface large cloth, an intermediate layer located between the working surface large cloth and the non-working surface large cloth, and an inner edge plate; the outer edge plate is provided with two mounting holes symmetrically distributed about the center of the outer edge plate, and bushings are installed in the mounting holes;

[0005] The working surface large cloth and the non-working surface large cloth both include the outermost 2 layers of glass cloth prepreg large cloth ply and the inner 6 layers of carbon fiber cloth prepreg large cloth ply; the shapes of the 8 layers of large cloth ply of the working surface and the non-working surface respectively match the horizontal shapes of the working surface and the non-working surface of the blade, the closer to the inner layer, the thinner the middle of the large cloth ply; the corresponding large cloth ply of the working surface and the non-working surface is laid at the same angle, and is laid from the outer layer to the inner layer according to the ply angles of +45°, -45°, 0°, -45°, +45°, 0°, 0° and +45°, thereby reducing the deformation of the stator blade; the edges of the working surface large cloth 2 and the non-working surface large cloth 4 are turned outward in opposite directions, each turned toward the inner edge of the inner edge plate 7 and the outer edge plate 1, so that the composite molded parts are integrated, thereby improving the bearing capacity of the stator blade;

[0006] The middle layer is formed by laying 11 layers of non-working surface carbon fiber cloth prepreg middle plies and 11 layers of working surface carbon fiber cloth prepreg middle plies, the middle of the middle plies is a symmetric plane, the corresponding layers are symmetrically laid at the same angle, and the plies are laid from the outer layer to the inner layer according to the ply angles of 0°, 0°, -45°, 0°, 0°, 0°, +45°, -45°, 0°, 0° and -45°; the shape of the outermost layer of the non-working surface middle plies matches the shape of the innermost layer of the non-working surface large cloth plies, and the innermost layers are shorter, and the shape of the outermost layer of the working surface middle plies matches the working surface large cloth plies, and the innermost layers are shorter;

[0007] The outer edge plate is thick in the middle and thin at both ends, and the mounting hole is opened in the middle. It is formed by laying out the outermost 2 layers of glass cloth prepreg outer edge outer layers, the middle 19 layers of carbon fiber cloth prepreg outer edge middle layers and 41 layers of carbon fiber cloth prepreg small cloth outer edge inner layers. The 2 layers of outer edge outer layers and the 19 layers of outer edge middle layers wrap the 41 layers of small cloth outer edge inner layers inside, and are laid alternately at +45°, -45°, 0° and 90°; the structural integrity and bearing capacity of the outer edge plate are improved;

[0008] The inner edge plate is a rounded rectangle, which is formed by laying out 2 layers of glass cloth prepreg inner edge outer plies and 8 layers of carbon fiber cloth prepreg inner edge inner plies. The inner edge outer plies and the inner edge inner plies are laid alternately at layup angles of +45° and -45° from outside to inside.

[0009] Further preferably, there is a gap between the working surface large cloth, the non-working surface large cloth and the outer edge plate, and the gap is filled with filling material I; there is a gap between the working surface large cloth, the non-working surface large cloth and the inner edge plate, and the gap is filled with filling material II; filling material I and filling material II are made of carbon fiber cloth prepreg strips, so as to further improve the strength of the composite material stator blade.

[0010] The present invention uses composite materials to replace metal materials, reduces the weight of the stator blades, lays the glass cloth prepreg on the outside of the carbon fiber cloth prepreg, improves the surface finish of the stator blades, and avoids galvanic corrosion. The present invention greatly improves the reliability of the stator blades, extends the service life of the blades, and reduces the maintenance cost of the stator blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention viewed from one angle;

[0012] Figure 2 It is a structural schematic diagram of the present invention viewed from another angle;

[0013] Figure 3 for Figure 2 AA section view;

[0014] Figure 4 for Figure 2 BB cross-section diagram;

[0015] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the composite material molded part of the present invention;

[0016] Figure 6 It is a schematic diagram of the structure of the outer edge plate in the present invention;

[0017] Figure 7 It is a schematic diagram of the structure of the inner edge plate in the present invention;

[0018] Figure 8 is a radial diagram of the middle layer in the present invention;

[0019] Fig. 9 It is a cross-sectional view of the intermediate layer in the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 9 As shown, this embodiment includes a composite molded part 8, a nickel edging 10 and a bushing 11 wrapped around the front and rear edges of the composite molded part 8. The composite molded part includes an outer edge plate 1, a working surface large cloth 2, a non-working surface large cloth 4, an intermediate layer 3 located between the working surface large cloth and the non-working surface large cloth 4, and an inner edge plate 7. The outer edge plate 1 is provided with two mounting holes 9 symmetrically distributed about the center of the outer edge plate 1, and a bushing 11 is installed in the mounting hole 9.

[0022] The working surface cloth 2 and the non-working surface cloth 4 both include the outermost 2 layers of glass cloth prepreg cloth ply and the inner 6 layers of carbon fiber cloth prepreg cloth ply. The shapes of the 8 layers of cloth ply on the working surface and the non-working surface match the horizontal shapes of the working surface and the non-working surface of the blade respectively. The closer to the inner layer, the thinner the middle of the cloth ply. The corresponding cloth ply on the working surface and the non-working surface is laid at the same angle, and is laid from the outer layer to the inner layer according to the ply angles of +45°, -45°, 0°, -45°, +45°, 0°, 0° and +45°, which reduces the deformation of the stator blade. The edges of the working surface cloth 2 and the non-working surface cloth 4 are turned outward in opposite directions, each turned toward the inner edge of the inner edge plate 7 and the outer edge plate 1, so that the composite molded parts are integrated, which improves the load-bearing capacity of the stator blade.

[0023] The intermediate layer 3 is formed by laying 11 layers of non-working surface carbon fiber cloth prepreg intermediate layers and 11 layers of working surface carbon fiber cloth prepreg intermediate layers, with the middle of the intermediate layers as the symmetry plane, and the corresponding layers are laid symmetrically at the same angle, and are laid from the outer layer to the inner layer according to the laying angles of 0°, 0°, -45°, 0°, 0°, 0°, +45°, -45°, 0°, 0° and -45°. The shape of the outermost layer of the intermediate layer of the non-working surface matches the shape of the innermost layer of the large cloth layer of the non-working surface, and the intermediate layer is shorter as it moves to the inner layer, and the shape of the outermost layer of the intermediate layer of the working surface matches the large cloth layer of the working surface, and the intermediate layer is shorter as it moves to the inner layer.

[0024] The outer edge plate 1 is thick in the middle and thin at both ends, and the mounting hole is opened in the middle. It is formed by laying out the outermost 2 layers of glass cloth prepreg outer edge outer layers, the middle 19 layers of carbon fiber cloth prepreg outer edge middle layers and 41 layers of carbon fiber cloth prepreg small cloth outer edge inner layers. The 2 layers of outer edge outer layers and the 19 layers of outer edge middle layers wrap the 41 layers of small cloth outer edge inner layers inside, and are laid alternately at +45°, -45°, 0° and 90°. The structural integrity and bearing capacity of the outer edge plate are improved.

[0025] The inner edge plate 7 is a rounded rectangle, which is formed by laying out 2 layers of glass cloth prepreg inner edge outer plies and 8 layers of carbon fiber cloth prepreg inner edge inner plies. The inner edge outer plies and the inner edge inner plies are laid alternately at ply angles of +45° and -45° from outside to inside.

[0026] Further preferably, there is a gap between the working surface large cloth 2, the non-working surface large cloth 4 and the outer edge plate 1, and the gap is filled with filling material I5. There is a gap between the working surface large cloth 2, the non-working surface large cloth 4 and the inner edge plate 7, and the gap is filled with filling material II6. Filling material I5 and filling material II6 are made of carbon fiber cloth prepreg strips.

[0027] Of course, the present invention has many other embodiments. Without violating the spirit and essence of the present invention, technicians familiar with the field can make corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should be regarded as improvements of equivalent technologies and belong to the protection scope of the claims of the present invention.

Claims

1. A composite stator blade for an engine, characterized in that: It comprises a composite molded part, a nickel edging and a bushing wrapped around the front and rear edges of the composite molded part; the composite molded part comprises an outer edge plate, a working surface cloth, a non-working surface cloth, an intermediate layer between the working surface cloth and the non-working surface cloth, and an inner edge plate; the outer edge plate is provided with two mounting holes symmetrically distributed with respect to the center of the outer edge plate, and bushings are installed in the mounting holes; The working surface large cloth and the non-working surface large cloth both include the outermost 2 layers of glass cloth prepreg large cloth ply and the inner 6 layers of carbon fiber cloth prepreg large cloth ply; the shapes of the 8 layers of large cloth ply on the working surface and the non-working surface respectively match the horizontal shapes of the working surface and the non-working surface of the blade, the larger the ply closer to the inner layer, the thinner the middle part; the corresponding large cloth ply on the working surface and the non-working surface is laid at the same angle, and is laid from the outer layer to the inner layer at the ply angles of +45°, -45°, 0°, -45°, +45°, 0°, 0° and +45°; the edges of the working surface large cloth and the non-working surface large cloth are turned outward in opposite directions, each turned toward the inner edge of the inner edge plate and the outer edge plate; The middle layer is formed by laying 11 layers of non-working surface carbon fiber cloth prepreg middle plies and 11 layers of working surface carbon fiber cloth prepreg middle plies, the middle of the middle plies is a symmetric plane, the corresponding layers are symmetrically laid at the same angle, and the plies are laid from the outer layer to the inner layer according to the ply angles of 0°, 0°, -45°, 0°, 0°, 0°, +45°, -45°, 0°, 0° and -45°; the shape of the outermost layer of the non-working surface middle plies matches the shape of the innermost layer of the non-working surface large cloth plies, and the innermost layers are shorter, and the shape of the outermost layer of the working surface middle plies matches the working surface large cloth plies, and the innermost layers are shorter; The outer edge plate is thick in the middle and thin at both ends, and the mounting hole is opened in the middle. It is formed by laying out the outermost 2 layers of glass cloth prepreg outer edge outer layers, the middle 19 layers of carbon fiber cloth prepreg outer edge middle layers and 41 layers of carbon fiber cloth prepreg small cloth outer edge inner layers. The 2 layers of outer edge outer layers and the 19 layers of outer edge middle layers wrap the 41 layers of small cloth outer edge inner layers inside, and are laid alternately at +45°, -45°, 0° and 90°. The inner edge plate is a rounded rectangle, which is formed by laying out 2 layers of glass cloth prepreg inner edge outer plies and 8 layers of carbon fiber cloth prepreg inner edge inner plies. The inner edge outer plies and the inner edge inner plies are laid alternately at layup angles of +45° and -45° from outside to inside.

2. The composite stator blade for an engine according to claim 1, characterized in that: There is a gap between the working surface large cloth, the non-working surface large cloth and the outer edge plate, and the gap is filled with filling material I; there is a gap between the working surface large cloth, the non-working surface large cloth and the inner edge plate, and the gap is filled with filling material II; filling material I and filling material II are made of carbon fiber cloth prepreg strips.

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