CN115182789A - Stator assembly, method of manufacturing, and impeller machine including the stator assembly - Google Patents

Stator assembly, method of manufacturing, and impeller machine including the stator assembly Download PDF

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Publication number
CN115182789A
CN115182789A CN202110372575.6A CN202110372575A CN115182789A CN 115182789 A CN115182789 A CN 115182789A CN 202110372575 A CN202110372575 A CN 202110372575A CN 115182789 A CN115182789 A CN 115182789A
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China
Prior art keywords
stator
inner ring
casing
manufacturing
stator assembly
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Pending
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CN202110372575.6A
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Chinese (zh)
Inventor
洪天然
刘杰杰
史枭颖
张燕
杨超
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AECC Commercial Aircraft Engine Co Ltd
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AECC Commercial Aircraft Engine Co Ltd
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Application filed by AECC Commercial Aircraft Engine Co Ltd filed Critical AECC Commercial Aircraft Engine Co Ltd
Priority to CN202110372575.6A priority Critical patent/CN115182789A/en
Publication of CN115182789A publication Critical patent/CN115182789A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F01D9/044—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas turbines
    • F05D2220/321—Application in turbines in gas turbines for a special turbine stage
    • F05D2220/3216—Application in turbines in gas turbines for a special turbine stage for a special compressor stage

Abstract

The invention relates to a stator assembly, a manufacturing method and an impeller machine comprising the stator assembly. The manufacturing method of the stator component comprises the following steps of A, adopting an inner ring, a casing and a stator blade made of an aluminum-based composite material, wherein the stator blade is welded to the inner ring and the casing at two radial ends of the stator blade respectively to obtain a first stator component, and the inner ring, the stator blade and the casing are sequentially arranged on the first stator component from inside to outside in the radial direction respectively; and B, carrying out solution aging heat treatment on the first stator assembly obtained in the step A, wherein the thermal deformation of the first stator assembly is limited in the solution aging heat treatment process, and obtaining a second stator assembly.

Description

Stator assembly, method of manufacturing, and impeller machine including the stator assembly
Technical Field
The invention relates to the field of manufacturing, in particular to a stator assembly, a manufacturing method and an impeller machine comprising the stator assembly.
Background
A supercharging stage for turbomachinery, such as a gas turbine engine, comprises a rotor and a stator assembly, the stator blades of the supercharging stage and their inner ring having an operating temperature below 150 ℃. In the prior art, a booster stage stator component is generally made of 17-4PH stainless steel or TC4 titanium alloy, but both have larger improvement space in the aspect of light weight, and titanium alloy manufacturing also has the risk of titanium fire.
The working environment temperature of the booster stage is below 200 ℃, so that the aluminum-based composite material can be adopted, and the density of the aluminum-based composite material is 2.7-3.0g/cm 3 The density of the 17-4PH stainless steel or TC4 titanium alloy used for the traditional booster stage stator component is about 40% and 65% respectively, so the booster stage stator component has good lightweight performance.
In the prior art, a scheme of using an aluminum-based composite material as a booster stage stator component is that a stator component formed by an inner ring, a casing and stator blades is processed into an integrally formed integral structure as described in chinese patent application with publication number CN111764968A and application number "202010425729.9", entitled "aluminum-based composite material booster stage integral blade ring structure of an aircraft engine and a preparation method thereof".
However, the inventor finds that the yield of the stator assembly with the integral structure is not high in practice. The reason is that the annular blank with the thickness of 100mm-400mm needs to be machined in the machining process, the blank with large thickness is limited by the size of the original blank ingot in the process of pressure machining, the machining deformation is insufficient, the blank with large thickness is difficult to be fully quenched in the heat treatment process, the mechanical property of the integral structure is unstable, and the yield is low. In addition, in the process of machining the large-size blank into a light engine part, the utilization rate of materials is low, so that the total manufacturing cost is high, the equipment cost factor of comprehensive processing equipment, the material cost factor of the qualification rate and the material utilization rate, and the machining and manufacturing cost of the stator assembly with the integral structure is also high.
Therefore, there is a need in the art for a method of manufacturing a stator assembly that has stable mechanical properties, high yield, and reduced manufacturing cost while satisfying the requirement for weight reduction.
Disclosure of Invention
The invention aims to provide a method for manufacturing a stator assembly.
The invention aims to provide a stator assembly.
The invention aims to provide an impeller machine.
A manufacturing method of a stator assembly according to an aspect of the present invention includes: step A, adopting an inner ring, a casing and a stator blade made of an aluminum-based composite material, wherein the two ends of the stator blade in the radial direction are respectively welded to the inner ring and the casing to obtain a first stator component, and the inner ring, the stator blade and the casing are respectively and sequentially arranged on the first stator component from inside to outside in the radial direction; and B, carrying out solution aging heat treatment on the first stator assembly obtained in the step A, wherein the thermal deformation of the first stator assembly is limited in the solution aging heat treatment process, and obtaining a second stator assembly.
In one or more embodiments of the manufacturing method, the thickness of the inner ring and the casing in the step a is less than 50 mm.
In one or more embodiments of the manufacturing method, in the step a, the welding is performed by argon arc welding or electron beam welding.
In one or more embodiments of the manufacturing method, in the step a, the aluminum matrix of the inner ring, the casing, and the stator blade of the aluminum matrix composite is 2XXX series, the welding is electron beam welding, and the solution aging heat treatment includes: firstly, carrying out solution treatment at 490-500 ℃ for 2-6 h, and cooling by water after the heat preservation is finished; then carrying out aging treatment at the temperature of 170-190 ℃ for 10-20h, and air cooling after the heat preservation is finished; or in the step A, the aluminum matrix of the inner ring, the casing and the stator blade of the aluminum-based composite material is 7XXX series, the welding adopts argon arc welding, and the schedule of the solution aging heat treatment comprises the following steps: firstly, carrying out solution treatment at the temperature of 470-490 ℃ for 2-6 h, and cooling by water after the heat preservation is finished; then carrying out aging treatment at the temperature of 120-130 ℃ for 5-15 h, and air cooling after the heat preservation is finished.
In one or more embodiments of the method of manufacturing, the aluminum matrix of the inner ring, casing and stator component blades of the aluminum matrix composite is 2XXX series, the reinforcement is silicon carbide particles with a particle size of 1-15 μm, accounting for 10-20% by volume of the aluminum matrix composite; or the aluminum matrix of the inner ring, the casing and the stator component blade of the aluminum matrix composite material is 7XXX series, the reinforcement is titanium boride particles, the particle size is less than 1 mu m, and the volume percentage of the reinforcement in the aluminum matrix composite material is 5-10%.
In one or more embodiments of the manufacturing method, in the step B, a tool is used to limit the thermal deformation of the first stator component during the solution aging heat treatment, and the tool includes an inner limit portion and an outer limit portion, the inner limit portion limits the inner diameter of the inner ring, and the outer limit portion limits the inner diameter of the casing.
In one or more embodiments of the method of manufacturing, the method of manufacturing further comprises: s1, before the step A, carrying out ring rolling on an aluminum-based composite material blank ingot to respectively obtain an inner ring piece and a casing piece; and extruding the aluminum-based composite material blank to obtain a bar, and performing die forging to obtain the static vane piece.
In one or more embodiments of the manufacturing method, in the step S1, the stator blade member obtained by ring rolling the inner ring member, the casing member, and the die forging is roughly machined to the inner ring, the casing, and the stator blade of the step a, with a dimensional allowance of 0.5 to 5mm; the step manufacturing method further includes a step S2 of finishing the second stator component to manufacture a finished stator component after the step B.
In one or more embodiments of the method of manufacturing, the stator component is a booster stage stator of a gas turbine engine.
A stator assembly according to an aspect of the present invention is obtained by the manufacturing method as described in any one of the above.
According to one aspect of the invention, the impeller machinery comprises a first working area, the working temperature of the first working area is less than 200 ℃, the first working area is provided with a rotor and a stator assembly, wherein an inner ring, a casing and a stator blade of the stator assembly are all made of aluminum-based composite materials, the stator blade is welded to the inner ring and the casing at two radial ends of the stator blade respectively, and the inner ring, the stator blade and the casing are sequentially distributed on the stator assembly from inside to outside in the radial direction.
In one or more embodiments of the turbomachine, the first operating zone of the turbomachine is a boost stage of a gas turbine engine.
In summary, the present invention has been made in an advantageous effect including, but not limited to, achieving low-cost and lightweight stator assembly manufacturing by welding stator blades at both ends in the radial direction to an inner ring and a casing, respectively, and subjecting the welded first stator assembly to solution aging heat treatment, and limiting deformation, and achieving high stator assembly manufacturing yield, and achieving weight reduction and efficiency improvement of an impeller machine including the stator assembly.
Drawings
The above and other features, characteristics and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and examples, wherein it is to be noted that the drawings are given by way of illustration only, are not drawn to scale, and should not be taken as limiting the scope of the invention, which is actually claimed, wherein:
FIG. 1 is a schematic structural diagram of a stator assembly according to an embodiment.
FIG. 2 is a flow diagram of a method of manufacturing a stator assembly according to an embodiment.
Fig. 3 is a schematic structural view of a deformation prevention tool of a manufacturing method of a stator assembly according to an embodiment.
Fig. 4 is a material microstructure diagram of the manufacturing method of the stator assembly according to the first embodiment.
Fig. 5 is a material microstructure diagram of a manufacturing method of a stator assembly according to a second embodiment.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. "one embodiment," "an embodiment," and/or "some embodiments" mean a certain feature, structure, or characteristic described in connection with at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Flowcharts are used herein to illustrate the operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Other operations may also be added to, or removed from, the processes.
In the following description of the embodiments, the turbomachinery is exemplified by a booster stage of a gas turbine engine, and the stator assembly is a first-stage stator assembly of the booster stage, but not limited thereto. The requirement of the aluminum matrix composite material on the working temperature is only required to be met.
As shown in fig. 1 and 2, in an embodiment, a method for manufacturing the stator assembly 10 includes:
step A, adopting an inner ring 1, a casing 2 and a stator blade 3 made of an aluminum-based composite material, wherein the stator blade 3 is welded to the inner ring 1 and the casing 2 at two radial ends of the stator blade 3 respectively to obtain a first stator component, and the inner ring 1, the stator blade 3 and the casing 2 are sequentially arranged on the first stator component from inside to outside in the radial direction respectively;
and B, carrying out solution aging heat treatment on the first stator assembly obtained in the step A, wherein the thermal deformation of the first stator assembly is limited in the solution aging heat treatment process, and obtaining a second stator assembly.
The inner ring 1, the casing 2, and the stator blade 3 using the aluminum matrix composite in step a may be manufactured before the stator assembly 10 is manufactured, or the main body of the stator assembly 10 may purchase the required aluminum matrix composite inner ring 1, casing 2, and stator blade 3 from a supplier. The specific manufacturing method may be to use three cylindrical billet ingots, wherein one of the cylindrical billet ingots is extruded to obtain a rectangular bar material, and the bar material is die forged into a stator blade member to form the stator blade 3, or to use a forging process to obtain the rectangular bar material. One of the cylindrical blank ingots is processed into an inner ring piece by adopting a ring rolling process to form an inner ring 1; one of the cylindrical billet is formed into a casing member by a cerclage process to form the casing 2. It will be appreciated that the inner ring member and the case member may be formed by a free forging or die forging process in addition to the cerclage process. Specific dimensions are described in detail in the first embodiment and the second embodiment below.
The specific process for welding the inner ring 1, the casing 2 and the stator blade 3 can be argon arc welding or electron beam welding, and the welding process has firm and reliable connection effect and long fatigue life. In step B, the thermal deformation of the first stator assembly during the solution aging heat treatment process can be generally limited by providing a deformation prevention tool, as shown in fig. 3, the deformation prevention tool 20 may include an inner limiting portion 21, an outer limiting portion 22 and a base 23, the inner limiting portion 21 and the outer limiting portion 22 respectively extend an inner limiting length and an outer limiting length along the axial direction at different radial positions, wherein the inner limiting length is greater than the outer limiting length. The inner limiting portion 21 limits the inner diameter of the inner ring 1, and the outer limiting portion 22 limits the inner diameter of the casing 2. In general, after step B, it is also necessary to continue to finish the second stator component in order to obtain the finished stator component, but it is not excluded that the step of heat treatment of step B is sufficiently precise and that, after step B has been carried out, it is directly obtained, i.e. the finished stator component, without further finishing.
The stator assembly manufacturing method has the advantages that the stator assembly is manufactured with low cost and light weight, and the weight reduction and the efficiency improvement of the impeller machine comprising the stator assembly are realized. The principle lies in that, compared with the scheme of the integral structure in the prior art, because the inner ring 1, the casing 2 and the stator blade 3 are respectively formed firstly, the thickness of a blank piece of the aluminum-based composite material can be controlled below 50mm, not only enough mechanical properties are ensured on the premise of light weight performance, but also the stable and qualified rate of the mechanical properties is high, and because the inner ring 1, the casing 2 and the stator blade 3 are respectively formed firstly, compared with the integral structure in the prior art, a blank ingot is adopted, a plurality of smaller blank ingots are respectively used for forming the inner ring 1, the casing 2 and the stator blade 3 instead of a very large blank ingot for forming the integral stator component, and the defects of high processing equipment cost and high material cost caused by low material utilization rate due to the need of large-tonnage material production equipment are also avoided; the reason why the post-welding solution aging heat treatment and deformation prevention process are adopted in the step B is that the inventor finds in practice that for the aluminum-based composite material, if the heat treatment system is the pre-welding solution treatment in the welding process, and the post-welding aging treatment, the obtained stator assembly cannot meet the requirement of mechanical property easily. The reason is that the supersaturation degree of an aluminum alloy matrix in a supersaturation state obtained by solid solution in the area near a welding seam can be seriously reduced by heat input in the welding process, so that the final aging strengthening effect is seriously influenced, and the mechanical property after final welding is poor, the aluminum matrix alloy is selected from 2XXX series aluminum alloy or 7XXX series aluminum alloy, the welding strength of the welding seam is approximately equal to about 50-75% of that of a base material, and the strength of the welding seam can not meet the design requirement.
The invention is further illustrated by the following two specific examples.
First embodiment
The booster-stage stator component comprises a stator blade, an inner ring and a casing, wherein the booster-stage stator blade, the inner ring and the casing are all made of silicon carbide particle reinforced aluminum matrix composite. Wherein the material of the structure used for the blades, inner ring and casing is 15% SiC/2009 aluminum matrix composite, the reinforcement particles are SiC particles having an average particle size of 15 μm, the reinforcement particles are SiC particles having a volume percentage of 15% in the composite, and the aluminum matrix powder is 2009Al. The specific designation of the 2XXX series is not 2009Al, and the particle size may range from 1 μm to 15 μm, and may range from 10% to 20% by volume.
The method for manufacturing the booster stage stator assembly may specifically include:
(1) Obtaining 3 blank ingots of the aluminum matrix composite material with the diameter of 400mm and the height of 600mm by a powder metallurgy method; (2) One billet is processed into a rectangular bar with the cross section of 20 x 50mm by an extrusion mode; (3) Forging the rectangular bar into a blade forging with the average allowance of about 5mm, and using the blade forging to process a blade; (4) Processing the second billet into a ring rolling piece for the inner ring in a ring rolling mode, wherein the inner diameter is 1100mm, the outer diameter is 1200mm, and the axial length is 100mm, and the ring rolling piece is used for processing the inner ring; (5) Processing the third billet into a ring rolling piece for the casing in a ring rolling way, wherein the inner diameter of the ring rolling piece is 1400mm, the outer diameter of the ring rolling piece is 1500mm, the axial length of the ring rolling piece is 200mm, and the ring rolling piece is used for processing the casing, and the inner diameter and the outer diameter refer to the diameter, so that the thickness is (outer diameter-inner diameter)/2, namely 50mm; (6) Machining the blade, the inner ring and the casing to a rough machining state in a mechanical machining mode, machining the joint in place, and keeping the rest size to be 3mm; the size allowance can be 0.5mm-5mm; (7) Assembling the blade, the inner ring and the casing in place, fixing the blades, the inner ring and the casing, and particularly assembling the blades, the inner ring and the casing through a tool; (8) Under the condition that the tool is fixed, the blade, the inner ring and the casing are mutually connected into a first stator assembly in a rough machining state in an electron beam welding mode, and welding parameters can be as follows: acceleration voltage: (50-80) KV, electron beam current (40-55 mA, welding speed: (10-20) mm/S, vacuum degree less than or equal to 10 -3 Pa; (9) Carrying out solid solution aging treatment on the first stator assembly obtained by welding connection, firstly carrying out solid solution treatment at the temperature of 490-500 ℃ for 2-6 h, and carrying out water cooling after the heat preservation is finished; then carrying out aging treatment at the temperature of 170-190 ℃ for 10-20h, and air cooling after the heat preservation is finished; the deformation is limited by the deformation prevention tool 20 shown in fig. 3 during the heat treatment process; (10) And (4) preparing the second stator component obtained through heat treatment into the required finished booster-stage stator component through numerical control processing. The main mechanical properties of the booster stage stator component prepared by the process are shown in the following table 1, and compared with the embodiment 1 of the scheme (CN 111764968A) with an integral structure, the booster stage stator component has similar mechanical properties, namely the technical scheme of the first embodiment has similar mechanical properties compared with the scheme in the prior art, can meet the mechanical property requirements of the booster stage stator of the gas turbine engine, but has low manufacturing equipment cost and material cost and high yield. The welding seam strength of the welding structure can reach more than 80% of that of the base material, and the welding seam strength requirement is met. The typical microstructure of the material is shown in fig. 4, and it can be seen that the microstructure of the material is fine and uniform.
Table 1: mechanical properties of the stator assembly of the first embodiment
Figure BDA0003009924480000081
Second embodiment
The booster stage stator component comprises a stator blade, an inner ring and a casing, wherein the booster stage stator blade, the inner ring and the casing are all made of silicon carbide particle reinforced aluminum matrix composite materials. Wherein the material used for the blades, inner ring and casing is 10% TiB 2 The/7050 aluminum-based composite material has reinforcing body particles of TiB 2 Particles with an average particle size of 0.1 μm and reinforcement particles of TiB 2 The volume percentage of the particles in the composite material was 6%, and the aluminum matrix powder was 7050Al. The specific designation of the 7XXX series is not limited to 7050Al, and the particle size may range from < 1 μm, and may range from 5% to 10% by volume.
The manufacturing method of the booster stage stator assembly specifically comprises the following steps:
(1) Obtaining 3 blank ingots with the diameter of 200mm and the height of 800mm by an in-situ self-stirring casting method; (2) Processing one of the blank ingots into a rectangular bar with the cross section of 20 multiplied by 50mm in an extrusion mode, and performing die forging on the rectangular bar to form a forging piece for the blade, wherein the average allowance is about 5mm, and the forging piece is used for processing the blade; (3) Processing the second blank ingot into a ring rolling piece for the inner ring in a ring rolling mode, wherein the inner diameter of the ring rolling piece is 1150mm, the outer diameter of the ring rolling piece is 1200mm, and the axial length of the ring rolling piece is 100mm, and the ring rolling piece is used for processing the inner ring; (4) Processing the third billet into a ring rolling piece for the case in a ring rolling mode, wherein the inner diameter is 1400mm, the outer diameter is 1450mm, the axial length is 200mm, and the ring rolling piece is used for processing the case, and the inner diameter and the outer diameter refer to the diameter, so that the thickness is (outer diameter-inner diameter)/2, namely 25mm; (5) Machining the blade, the inner ring and the casing to a rough machining state in a mechanical machining mode, machining the joint in place, and keeping the rest size to be 2mm; the size allowance can be 0.5mm-5mm; (6) Assembling the blade, the inner ring and the casing in place and fixing; (7) Under the fixed condition of frock, with blade, inner ring and machine casket mutually through argon arc welding's mode, connect into the first stator subassembly of rough machining state, the welding parameter is: welding current: (150-180) A, welding speed: (1.5-2.5) mm/S, welding wire mark: ER5056, wire diameter: 1.2mm, argon flow: (10-15) L/min; (8) Carrying out solid solution aging heat treatment on the first stator assembly which is connected by welding, wherein the heat treatment system is as follows: firstly, carrying out solution treatment at the temperature of 470-490 ℃ for 2-6 h, and cooling by water after the heat preservation is finished; then carrying out aging treatment at the temperature of 120-130 ℃ for 5-15 h, and air cooling after the heat preservation is finished; the deformation is limited by the deformation prevention tool 20 shown in fig. 3 during the heat treatment process; (9) And (4) preparing the second stator component subjected to heat treatment into the required finished booster-stage stator component by numerical control machining. The main mechanical properties of the booster stage stator component prepared by the process are shown in the following table 2, and compared with the embodiment 2 of the scheme (CN 111764968A) with an integral structure, the booster stage stator component has similar mechanical properties, namely the technical scheme of the second embodiment has similar mechanical properties compared with the scheme in the prior art, and can meet the mechanical property requirements of the booster stage stator of the gas turbine engine, but the manufacturing equipment cost and the material cost are low, and the yield is high. The welding seam strength of the welding structure can reach more than 80% of that of the base material. The typical microstructure of the material is shown in fig. 5, and it can be seen that the microstructure of the material is fine and uniform.
Table 2: mechanical properties of stator Assembly of the second embodiment
Figure BDA0003009924480000091
From the first embodiment and the second embodiment, it can be seen that, no matter the aluminum matrix is the aluminum matrix composite material of 2XXX series or 7XXX series, compared with the scheme of the monolithic structure in the prior art, the manufacturing method of the stator component of the present disclosure adopts the technical scheme of the split processing welding and the heat treatment after welding, and on the premise of meeting the requirements of light weight, similar mechanical property and mechanical property, the manufacturing equipment cost and the material cost can be reduced, and the yield of the manufacturing process is high.
In summary, the stator assembly, the manufacturing method and the impeller machine including the stator assembly provided by the above embodiments have the beneficial effects that, but not limited to, the stator blades are respectively welded and connected with the inner ring and the casing at the radial two ends, the first stator assembly obtained after welding is subjected to solution heat treatment and aging, deformation is limited, the stator assembly with low cost and light weight is manufactured, the stator assembly is high in manufacturing yield, and weight reduction and efficiency improvement of the impeller machine including the stator assembly are realized.
Although the present invention has been disclosed in the above-mentioned embodiments, it is not intended to limit the present invention, and those skilled in the art may make variations and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the present invention defined by the claims.

Claims (12)

1. A method of manufacturing a stator assembly, the method comprising:
step A, adopting an inner ring, a casing and a stator blade made of an aluminum-based composite material, wherein the two ends of the stator blade in the radial direction are respectively welded to the inner ring and the casing to obtain a first stator component, and the inner ring, the stator blade and the casing are respectively and sequentially arranged on the first stator component from inside to outside in the radial direction;
and B, carrying out solution aging heat treatment on the first stator assembly obtained in the step A, wherein the thermal deformation of the first stator assembly is limited in the solution aging heat treatment process, and obtaining a second stator assembly.
2. The method of manufacturing a stator assembly according to claim 1, wherein the thickness of the inner ring and the casing in step a is 50mm or less.
3. The method of manufacturing a stator assembly according to claim 1, wherein in the step a, the welding is performed by argon arc welding or electron beam welding.
4. The method of manufacturing a stator assembly according to claim 1,
in the step A, the aluminum matrix of the inner ring, the casing and the stator blade of the aluminum-based composite material is 2XXX series, the welding is electron beam welding, and the schedule of the solution aging heat treatment comprises the following steps: firstly, carrying out solution treatment at 490-500 ℃ for 2-6 h, and cooling with water after the heat preservation is finished; then carrying out aging treatment at the temperature of 170-190 ℃ for 10-20h, and air cooling after the heat preservation is finished; or
In the step A, the aluminum matrix of the inner ring, the casing and the stator blade of the aluminum-based composite material is 7XXX series, the welding adopts argon arc welding, and the schedule of the solution aging heat treatment comprises the following steps: firstly, carrying out solution treatment at the temperature of 470-490 ℃ for 2-6 h, and cooling by water after the heat preservation is finished; then carrying out aging treatment at the temperature of 120-130 ℃ for 5-15 h, and air cooling after the heat preservation is finished.
5. The method of manufacturing a stator component according to claim 4, wherein the aluminum matrix of the inner ring, the casing, and the stator component blade of the aluminum matrix composite is 2XXX series, the reinforcement is silicon carbide particles having a particle size of 1 μm to 15 μm, and the volume percentage of the aluminum matrix composite is 10% to 20%; or
The inner ring, the casing and the aluminum matrix of the stator component blade of the aluminum matrix composite are 7XXX series, the reinforcement is titanium boride particles, the particle size is less than 1 mu m, and the volume percentage of the reinforcement in the aluminum matrix composite is 5-10%.
6. The stator assembly manufacturing method according to claim 1, wherein in the step B, a tool is used so that the thermal deformation of the first stator assembly is restricted during the solution aging heat treatment, the tool including an inner restricting portion that restricts in correspondence with an inner diameter of the inner ring and an outer restricting portion that restricts in correspondence with an inner diameter of the casing.
7. The method of manufacturing a stator assembly of claim 1, further comprising:
s1, before the step A, carrying out ring rolling on an aluminum-based composite material blank ingot to respectively obtain an inner ring piece and a casing piece; and extruding the aluminum-based composite material blank to obtain a bar, and performing die forging to obtain the stator blade piece.
8. The manufacturing method of the stator assembly according to claim 7, wherein in the step S1, the stator blade member obtained by ring rolling the inner ring member, the casing member, and swaging is roughly machined to the inner ring, the casing, and the stator blade of the step a with a dimensional allowance of 0.5 to 5mm; the step manufacturing method further includes a step S2 of finishing the second stator component to manufacture a finished stator component after the step B.
9. The method of manufacturing a stator assembly of claim 1, wherein the stator assembly is a booster stage stator of a gas turbine engine.
10. A stator component, characterized in that it is obtained by a manufacturing method according to any one of claims 1 to 9.
11. The utility model provides an impeller machinery, its characterized in that includes first workspace, the operating temperature of first workspace is less than 200 ℃, first workspace has rotor and stator subassembly, wherein, stator subassembly's inner ring, machine casket and stator blade are aluminium matrix composite, stator blade is welded respectively at its radial both ends inner ring, machine casket, and this stator subassembly distributes in proper order radially from inside to outside respectively the inner ring stator blade the machine casket.
12. The turbomachinery of claim 11, wherein said turbomachine first operating zone is a booster stage of a gas turbine engine.
CN202110372575.6A 2021-04-07 2021-04-07 Stator assembly, method of manufacturing, and impeller machine including the stator assembly Pending CN115182789A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116441696A (en) * 2023-06-19 2023-07-18 中国航发成都发动机有限公司 Vacuum electron beam welding method and clamping device for stator assembly of aero-engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116441696A (en) * 2023-06-19 2023-07-18 中国航发成都发动机有限公司 Vacuum electron beam welding method and clamping device for stator assembly of aero-engine
CN116441696B (en) * 2023-06-19 2023-09-15 中国航发成都发动机有限公司 Vacuum electron beam welding method and clamping device for stator assembly of aero-engine

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