阅读说明：本技术 复合材料叶片用包边的制作方法、产品及复合材料叶片 (Manufacturing method of edge covering for composite material blade, product and composite material blade ) 是由 姚丁杨 杨彪 蔡明� 王遵 李建林 任文毅 于 2021-08-24 设计创作，主要内容包括：复合材料叶片用包边的制作方法,其特征在于：先采用热压工艺成型钛合金材质的钛合金包边；接着在钛合金包边外表面形成底胶层,之后采用浇注硫化工艺在底胶层上形成弹性胶皮层。本发明先在钛合金包边上成型底胶层,再采用浇注硫化工艺在底胶层上形成弹性胶皮层,通过底胶层增大弹性胶皮层在钛合金包边表面的附着力使钛合金包边与弹性胶皮层的结合强度更高,可有效控制弹性胶皮层的厚度,制备出厚度更大、弹性更高的弹性胶皮层,包边的使用寿命长,使用可靠性更高。本发明还提供一种复合材料叶片用包边和复合材料叶片。(The manufacturing method of the edge covering for the composite material blade is characterized by comprising the following steps: firstly, forming a titanium alloy wrapping edge made of a titanium alloy material by adopting a hot pressing process; and then forming a bottom glue layer on the outer surface of the titanium alloy wrapping edge, and then forming an elastic glue layer on the bottom glue layer by adopting a casting vulcanization process. According to the invention, the primer layer is formed on the titanium alloy wrapping edge, the elastic rubber layer is formed on the primer layer by adopting a casting and vulcanizing process, the adhesive force of the elastic rubber layer on the surface of the titanium alloy wrapping edge is increased through the primer layer, so that the bonding strength of the titanium alloy wrapping edge and the elastic rubber layer is higher, the thickness of the elastic rubber layer can be effectively controlled, the elastic rubber layer with larger thickness and higher elasticity is prepared, the service life of the wrapping edge is long, and the use reliability is higher. The invention also provides a wrapping edge for the composite material blade and the composite material blade.)

1. The manufacturing method of the edge covering for the composite material blade is characterized by comprising the following steps: firstly, forming a titanium alloy wrapping edge made of a titanium alloy material by adopting a hot pressing process; and then forming a bottom glue layer on the outer surface of the titanium alloy wrapping edge, and then forming an elastic glue layer on the bottom glue layer by adopting a casting vulcanization process.

2. A method of making a tipping for a composite blade according to claim 1, characterised in that: the method for forming the primer layer on the outer surface of the titanium alloy wrapping edge comprises the following specific steps: firstly, the outer surface of the titanium alloy wrapping edge is polished and cleaned, then a layer of epoxy glue is sprayed, and a primer layer is formed after the epoxy glue is dried and cured.

3. A method of making a tipping for a composite blade according to claim 2, characterised in that: the main resin of the epoxy adhesive is E20 epoxy resin, and the curing agent is polyamide.

4. A method of making a tipping for a composite blade according to claim 3, characterised in that: the method for forming the elastic rubber layer on the bottom rubber layer of the edge cover by adopting the casting vulcanization process comprises the following specific steps: firstly, putting a titanium alloy covered edge with a bottom glue layer into a casting mould, then casting a casting polyurethane elastomer on the surface of the bottom glue layer, and then carrying out die assembly vulcanization to form an elastic rubber layer on the bottom glue layer.

5. A method of making a hem for a composite blade according to claim 4, comprising: the cast polyurethane elastomer is prepared by mixing TDI polyurethane prepolymer with curing agent and casting.

6. A method of making a hem for a composite blade according to claim 4, comprising: the thickness of the elastic rubber layer is 1-3 mm.

7. A covered edge for a composite material blade manufactured by the manufacturing method of a covered edge for a composite material blade according to any one of claims 1 to 6, characterized in that: the titanium alloy wrapping tape comprises a titanium alloy wrapping tape, a bottom glue layer formed on the titanium alloy wrapping tape and an elastic glue layer formed on the bottom glue layer, wherein the elastic glue layer is vulcanized and bonded on the bottom glue layer.

8. The fixed borduring of combined material blade, combined material blade leading edge, its characterized in that: the edge cover is the edge cover for the composite material blade of claim 7.

Technical Field

The invention relates to a manufacturing method of a wrapping edge for a composite material blade, a product and the composite material blade, which are applied to a composite material blade of a fan.

Background

For a turbine fan, a remarkable weight reduction effect can be obtained by adopting the composite material blade. However, during the rapid rotation of the blade, the leading edge of the blade is easily impacted by water drops and sand dust, thereby causing physical defects such as abrasion, pores, delamination and the like, and forming a weak point of strength. Therefore, a reliable edge wrapping design is required for composite blades to protect the leading edge of the blade.

At present, the means for protecting the front edge of the blade comprises various forms such as metal edge covering, composite material edge covering, protective coating and the like. The metal wrapping can obviously improve the impact resistance of the front edge, but the metal material can be corroded to different degrees in some special environments; the composite material edge is strong in corrosion resistance, but the impact resistance is general, and pores and abrasion are easy to occur under long-term sand impact; the protective coating has good wear resistance, but in order to achieve a good protective effect, the coating is generally sprayed to be thicker, and the thick coating is brittle and is easy to fall off when being impacted by strong foreign matters.

The detected related prior patents:

CN202011060393.7, a composite material blade edge covering method and structure;

CN202011128157.4, a method and a device for gluing a metal wrapping edge of a composite material blade;

CN202011378211.0, a high-elasticity fan blade edge-covering protective coating and a construction method thereof.

Disclosure of Invention

According to the manufacturing method of the wrapping edge for the composite material blade, provided by the invention, the bottom glue layer is formed on the titanium alloy wrapping edge, then the elastic rubber layer is formed on the bottom glue layer by adopting a pouring and vulcanizing process, the adhesive force of the elastic rubber layer on the surface of the titanium alloy wrapping edge is increased through the bottom glue layer, so that the bonding strength of the titanium alloy wrapping edge and the elastic rubber layer is higher, the thickness of the elastic rubber layer can be effectively controlled, the elastic rubber layer with larger thickness and higher elasticity is prepared, the service life of the wrapping edge is long, and the use reliability is higher. The invention also provides a wrapping edge for the composite material blade and the composite material blade.

In order to achieve the purpose, the invention adopts the technical scheme that:

the manufacturing method of the edge covering for the composite material blade is characterized by comprising the following steps: firstly, forming a titanium alloy wrapping edge made of a titanium alloy material by adopting a hot pressing process; and then forming a bottom glue layer on the outer surface of the titanium alloy wrapping edge, and then forming an elastic glue layer on the bottom glue layer by adopting a casting vulcanization process.

Preferably, the specific steps of forming the primer layer on the outer surface of the titanium alloy wrapping edge include: firstly, the outer surface of the titanium alloy wrapping edge is polished and cleaned, then a layer of epoxy glue is sprayed, and a primer layer is formed after the epoxy glue is dried and cured.

Preferably, the main resin of the epoxy glue is E20 epoxy resin, and the curing agent is polyamide.

Preferably, the step of forming the elastic rubber layer on the bottom rubber layer of the edge cover by adopting a casting vulcanization process comprises the following specific steps: firstly, putting a titanium alloy covered edge with a bottom glue layer into a casting mould, then casting a casting polyurethane elastomer on the surface of the bottom glue layer, and then carrying out die assembly vulcanization to form an elastic rubber layer on the bottom glue layer.

Preferably, the cast polyurethane elastomer is TDI polyurethane prepolymer, and the TDI polyurethane prepolymer is mixed with a curing agent and then cast.

Preferably, the thickness of the elastic rubber layer is 1-3 mm.

The edge covering for the composite material blade manufactured by the manufacturing method of the edge covering for the composite material blade is characterized in that: the titanium alloy wrapping tape comprises a titanium alloy wrapping tape, a bottom glue layer formed on the titanium alloy wrapping tape and an elastic glue layer formed on the bottom glue layer, wherein the elastic glue layer is vulcanized and bonded on the bottom glue layer.

The fixed borduring of combined material blade, combined material blade leading edge, its characterized in that: the edge cover is the edge cover for the composite material blade.

The invention has the beneficial effects that:

1. according to the manufacturing method of the wrapping edge for the composite material blade, the base adhesive layer is formed on the titanium alloy wrapping edge firstly, then the elastic rubber layer is formed on the base adhesive layer through a pouring and vulcanizing process, the adhesive force of the elastic rubber layer on the surface of the titanium alloy wrapping edge is increased through the base adhesive layer, so that the bonding strength of the titanium alloy wrapping edge and the elastic rubber layer is higher, the elastic rubber layer has excellent corrosion resistance, abrasion resistance and impact resistance, the front edge of the blade can be protected, the physical defects of pores, layering and the like of the edge of the composite material blade are avoided, and the safety of the composite material blade is greatly improved.

2. The elastic rubber layer is cast and vulcanized on the primer layer, so that the thickness of the elastic rubber layer can be effectively controlled, the elastic rubber layer with larger thickness and higher elasticity is prepared, the adhesion uniformity of the elastic rubber layer formed by vulcanization is better, and the adhesion capability is higher.

3. The main body resin of epoxy glue is E20 epoxy, and the curing agent is polyamide, vulcanizes the epoxy glue that forms the elasticity and glues the cortex and effectively increases the bonding strength at interface for the epoxy of curing agent through polyamide, improves the adhesive force of elasticity and glues the cortex on the titanium alloy is bordured, guarantees that the titanium alloy is bordured and is glued the reliable and stable combination in cortex with the elasticity, and the long service life of borduring, and the service reliability is higher.

Drawings

Fig. 1 is a schematic view of a composite blade edge cover of the present invention.

Detailed Description

An embodiment of the present invention will be described in detail with reference to fig. 1.

The manufacturing method of the edge covering for the composite material blade is characterized by comprising the following steps: firstly, forming a titanium alloy covered edge 1 made of a titanium alloy material by adopting a hot pressing process; and then forming a bottom glue layer 2 on the outer surface of the titanium alloy wrapping edge, and then forming an elastic rubber layer 3 on the bottom glue layer 2 by adopting a casting vulcanization process.

The manufacturing method of the composite material blade edge covering comprises the steps of firstly forming the primer layer 2 on the titanium alloy edge covering 1, then forming the elastic rubber layer 3 on the primer layer 2 by adopting a pouring and vulcanizing process, increasing the adhesive force of the elastic rubber layer 3 on the surface of the titanium alloy edge covering 1 through the primer layer 2, enabling the bonding strength of the titanium alloy edge covering and the elastic rubber layer to be higher, enabling the elastic rubber layer 3 to have excellent corrosion resistance, wear resistance and impact resistance, forming protection on the front edge of the blade, avoiding physical defects of pores, layering and the like on the edge of the composite material blade, and enabling the safety of the composite material blade to be greatly improved. Elastic rubber layer 3 adopts the pouring vulcanization molding on primer layer 2, can the effective control elastic rubber layer 3's thickness, prepares the elastic rubber layer that thickness is bigger, elasticity is higher, and its adnexed homogeneity of elastic rubber layer 3 through the vulcanization molding is better, and the adhesive force is higher.

The method comprises the following specific steps of forming a primer layer 2 on the outer surface of the titanium alloy wrapping edge 1: firstly, the outer surface of the titanium alloy wrapping edge 1 is subjected to wrapping edge polishing and cleaning treatment, then a layer of epoxy glue is sprayed, and a primer layer 2 is formed after the epoxy glue is dried and cured on the surface. The primer layer 2 plays a role in improving adhesive force to enable the elastic rubber layer 3 to be effectively attached, the sprayed epoxy glue is dried and cured at normal temperature, the primer layer 2 is formed, and the primer layer 2 is easy to form.

The epoxy glue is characterized in that the main resin of the epoxy glue is E20 epoxy resin, and the curing agent is polyamide. The polyamide is used as a curing agent of the epoxy adhesive, the bonding strength of an interface is effectively increased by using the epoxy adhesive with the polyamide as the curing agent in the process of forming the elastic adhesive skin layer through vulcanization, the adhesive force of the elastic adhesive skin layer on the titanium alloy edge covering is improved, the reliable and stable combination of the titanium alloy edge covering and the elastic adhesive skin layer is ensured, the service life of the edge covering is long, and the use reliability is higher.

The method comprises the following specific steps of forming an elastic rubber layer on a bottom rubber layer of the edge cover by adopting a casting vulcanization process: firstly, putting a titanium alloy covered edge with a bottom glue layer into a casting mould, then casting a casting polyurethane elastomer on the surface of the bottom glue layer, and then carrying out die assembly vulcanization to form an elastic rubber layer on the bottom glue layer. Pouring casting type polyurethane elastomer earlier, carrying out the compound die again and vulcanize, guarantee the adhesion homogeneity of elastic rubber cortex through pouring vulcanization process to the thickness that can effectively control elastic rubber cortex prepares the elastic rubber cortex that thickness is bigger, elasticity is higher, and its adnexed homogeneity of elastic rubber cortex through vulcanization molding is better, and the adhesive force is higher.

The casting polyurethane elastomer is prepared from TDI polyurethane prepolymer which is mixed with curing agent and then is cast. The TDI polyurethane prepolymer has good fluidity and better pouring uniformity.

The thickness of the elastic rubber layer is 1-3 mm, the thickness is larger, the elasticity is higher, and the corrosion resistance, the wear resistance and the impact resistance are higher.

The edge covering for the composite material blade manufactured by the manufacturing method of the edge covering for the composite material blade is characterized in that: the titanium alloy binding tape comprises a titanium alloy binding tape 1, a bottom glue layer 2 formed on the titanium alloy binding tape and an elastic glue layer 3 formed on the bottom glue layer, wherein the elastic glue layer is vulcanized and bonded on the bottom glue layer. The composite material blade in the binding middle sole glue layer increases the adhesive force of the elastic glue layer on the surface of the titanium alloy binding edge, so that the binding strength of the titanium alloy binding edge and the elastic glue layer is higher, the elastic glue layer has excellent corrosion resistance, wear resistance and impact resistance, the front edge of the blade can be protected, the physical defects of pores, layering and the like at the edge of the composite material blade are avoided, and the safety of the composite material blade is greatly improved.

The fixed borduring of combined material blade, combined material blade leading edge, its characterized in that: the edge cover is the edge cover for the composite material blade. The composite material blade has the advantages of large thickness of the middle wrapping edge, high elasticity and long service life, and the safety of the composite material blade is greatly improved.

The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.