CN115015382A - Manufacturing method of intelligent sensing resin-based containing casing and containing casing - Google Patents

Manufacturing method of intelligent sensing resin-based containing casing and containing casing Download PDF

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Publication number
CN115015382A
CN115015382A CN202210457741.7A CN202210457741A CN115015382A CN 115015382 A CN115015382 A CN 115015382A CN 202210457741 A CN202210457741 A CN 202210457741A CN 115015382 A CN115015382 A CN 115015382A
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optical fiber
fiber
manufacturing
casing
thickness
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Inventor
孙建波
刘永佼
易凯
杨智勇
张建宝
左小彪
张艺萌
雷琴
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Aerospace Research Institute of Materials and Processing Technology
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Aerospace Research Institute of Materials and Processing Technology
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Priority to CN202210457741.7A priority Critical patent/CN115015382A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • 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
    • F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0235—Plastics; polymers; soft materials, e.g. rubber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention relates to a manufacturing method of an intelligent sensing resin-based containing casing and the containing casing, aiming at the problem of structural health monitoring of the aero-engine fan containing casing and aiming at endowing the casing with intelligent sensing performance, the invention solves the problem of adaptability of optical fiber and manufacturing, and introduces an optical fiber sensor in the manufacturing process of the fan casing by the following modes: a) embedding the optical fiber protected by the aramid fiber sleeve into an automatic fiber laying structure of the case; b) the optical fiber and the carbon fiber or the aramid fiber are woven into a fabric structure, an intermediate material prepreg is prepared, the optical fiber sensor is introduced into the structure of the containing casing, and the structure is endowed with intelligent sensing performance by combining a special manufacturing process, so that the health monitoring of the structure of the containing casing is realized, and the safety of the fan casing with the largest static part at the cold end of the engine with a large bypass ratio is improved.

Description

Manufacturing method of intelligent sensing resin-based containing casing and containing casing
Technical Field
The invention relates to a manufacturing method of an intelligent sensing resin-based containing casing, which realizes the structural health monitoring of the containing casing, solves the problem of adaptability of optical fibers and manufacturing and belongs to the technical field of structural composite material manufacturing.
Background
The fan casing is the largest stationary part in an aircraft engine with a large bypass ratio and is one of the most important parts of an engine of a large civil passenger aircraft. Since the reliability of an aircraft engine is highly required by a passenger aircraft, conventional visual inspection and periodic non-destructive inspection are required to ensure the structural safety of the aircraft. If the casing part is contained, self health monitoring can be realized, and data are transmitted to the ground for maintenance in real time, so that the intellectualization of the casing part can be greatly improved, and the casing part is one of main development directions of future aircraft engines.
Although the fan casing goes through three stages of an all-metal casing, a partial composite material casing and a full composite material casing, the development of intelligence of the fan casing is rarely reached. Due to the pressing need for its life-cycle cost, there is a need to further increase the intelligence of the case. Aiming at the structural health monitoring or sensed requirements of the containing case, a maintenance engineer can acquire the actual conditions of the current parts more quickly and conveniently, and therefore maintenance and repair can be performed more quickly and more pertinently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a manufacturing method of an intelligent sensing resin-based containing casing and the containing casing, which solve the problem of structural health monitoring of the aircraft engine fan containing casing and the problem of adaptability of optical fibers and manufacturing.
The above purpose of the invention is mainly realized by the following technical scheme:
a manufacturing method of an intelligent sensing resin-based containing casing comprises a flange area, a containing area with variable thickness in the middle and a non-containing area, wherein in the manufacturing process, the manufacturing method comprises the following steps,
and adding the laying of a plurality of optical fibers in the layering process of the flange area and the middle variable-thickness containing area, curing to form a resin-based containing casing, and etching the grating in the optical fibers.
In the manufacturing method of the intelligent sensing resin-based container casing, the grating etched in the optical fiber comprises a strain grating, an acoustic emission grating or a temperature grating; the distance between two adjacent gratings on each optical fiber along the circumferential direction is 0.5-1.5 m.
In the manufacturing method of the intelligent sensing resin-based containing casing, the laying of the optical fiber in the fiber laying process of the flange area and the middle variable thickness containing area comprises the steps of laying the optical fiber after the optical fiber is arranged in the aramid fiber sleeve, and/or,
and (3) weaving the optical fiber and the carbon fiber or the optical fiber and the aramid fiber in a mixed mode.
In the manufacturing method of the intelligent sensing resin-based containing casing, the aramid fiber sleeve is a 6tex aramid fiber sleeve, and the mixed fabric is eight pieces of three-fly-forged-grain fabric.
In the above method for manufacturing a smart sensor resin-based containing casing, the method includes:
the integral region of the containing case is coated with prepreg to the required thickness h1, and an optical fiber of an inner etching grating is arranged at the R corners of the flange regions at the two ends in the circumferential direction;
laying prepreg in a middle accommodation area with variable thickness to a required thickness h2, and arranging a plurality of optical fibers of the internal etched grating at intervals in a circumferential direction;
sucking and compacting;
continuously laying the prepreg to the required thickness h3 in the middle thickness containing area;
sucking and compacting the glue;
the integral region of the containing case is coated with prepreg to the required thickness h4, and an optical fiber of an inner etching grating is arranged at the R corners of the flange regions at the two ends in the circumferential direction;
and (5) curing.
In the above method for manufacturing a smart resin-based containment casing, the method for arranging the optical fiber in the two end flange regions and the containment region with intermediate thickness comprises: the optical fiber is loaded into the aramid fiber sleeve, and/or,
the optical fiber and the carbon fiber or the optical fiber and the aramid fiber are mixed and woven into a fabric;
the aramid fiber sleeve is a 6tex aramid fiber sleeve; the mixed woven fabric is eight pieces of three-fly-forged-grain fabric.
In the manufacturing method of the intelligent sensing resin-based containing casing, the 6tex aramid fiber is aramid III fiber, the strength is greater than 4.4GPa, and the modulus is greater than 140 GPa;
the carbon fiber is one or the combination of T800-12K carbon fiber, M40 high modulus carbon fiber and T700-24K carbon fiber.
In the manufacturing method of the intelligent perception resin-based containing casing, the optical fiber of the inward etching grating is annularly arranged at the thickness inflection point in the middle variable-thickness containing area.
In the manufacturing method of the intelligent sensing resin-based containing casing, the etched grating in the optical fiber comprises a strain grating, an acoustic emission grating or a temperature grating; the distance between two adjacent gratings on each optical fiber along the circumferential direction is 0.5-1.5 m.
In the manufacturing method of the intelligent sensing resin-based containing casing, the layer thickness h1 is 1mm-2mm, the layer thickness h2 is 1mm-2mm, the layer thickness h3 is 4mm-8mm, and the layer thickness h4 is 8mm-13 mm.
In the manufacturing method of the intelligent sensing resin-based containing casing, the optical fiber filled with the aramid fiber sleeve and the mixed fabric of the optical fiber and the fiber are provided with the polytetrafluoroethylene PTFE sleeve at the expected leading-out part, so that the optical fiber leading-out port is prevented from being broken and losing efficacy in an autoclave after being embedded, and a protection device is prevented from entering a product structure; and silicon rubber with the temperature resistance of 200 ℃ or above is adopted for sealing, so that the resin rubber is prevented from flowing out of the sleeve in the curing process.
In the manufacturing method of the intelligent sensing resin-based containing casing, the optical fiber of the internal etching grating meets the following requirements:
the FBG strain sensor array is packaged, the measuring range of the FBG strain sensor is +/-4000 mu epsilon-6000 mu epsilon, the precision is 1 mu epsilon, and the strain sensitivity coefficient is 0.9-1.0 pm/mu epsilon; the FBG temperature sensor after packaging measures the temperature at the working wavelength of 350 ℃ at the maximum, the precision is 0.1 ℃, and the temperature sensitivity coefficient is 8-12 pm/DEG C;
the chirp grating sensing array has a wavelength range of 1530-1580nm, a sampling frequency of 30kHz and a vibration measuring range of 0-5000 Hz;
the sampling frequency of a signal acquisition system of the F-P acoustic sensor is 200kHz, and the measuring range of the acoustic sensor is 100 kHz.
An intelligent sensing resin-based containing casing is obtained by adopting the manufacturing method.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a manufacturing method of an intelligent sensing resin-based containing casing, aiming at the problem of structural health monitoring of an aircraft engine fan containing casing, solving the problem of adaptability of optical fibers and manufacturing, and introducing an optical fiber sensor in the manufacturing process of the fan casing in the following modes: a) embedding optical fibers protected by a 6tex aramid fiber sleeve into an automatic fiber laying structure of a case; b) the optical fiber and the carbon fiber or the aramid fiber are woven into a fabric structure, an intermediate material prepreg is prepared, the optical fiber sensor is introduced into the structure of the containing casing, and the structure is endowed with intelligent sensing performance by combining a special manufacturing process, so that the health monitoring of the structure of the containing casing is realized, and the safety of the fan casing with the largest static part at the cold end of the engine with a large bypass ratio is improved.
Drawings
FIG. 1 is a schematic diagram of two techniques incorporating a fiber optic sensor according to the present invention, wherein FIGS. 1a and 1b show the two techniques respectively;
FIG. 2 is a schematic diagram of the spacing of the gratings of the fiber optic sensor of the present invention;
FIG. 3 is a schematic diagram of an optical fiber sensor lead-out protection device according to the present invention;
FIG. 4 is a diagram of the distribution of fiber optic sensors in the containment case structure of the present invention;
FIG. 5 is a schematic view of the contained case curing system of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the intelligent sensing resin-based containing casing is divided into a flange area, a middle variable-thickness containing area and other non-containing areas, as shown in fig. 4, the containing casing structure is a section view along an axis, the flange areas with R angles at two ends are arranged, the variable-thickness containing areas are distributed in the middle, and the non-containing areas are distributed at two sides of the containing areas. In an optional embodiment of the invention, the thickness of the flange region is 12-17mm, the inner and outer R angles are R5-R20, and the thickness of the variable thickness containing region is 28-35 mm. The intelligent sensing performance of the resin-based container casing is endowed by embedding the optical fiber sensor into the casing structure.
The intelligent sensing resin-based containing casing adopts an automatic filament laying-autoclave molding and curing process, and the raw material used in an optional embodiment is T800-grade dry prepreg. The intelligent perception performance is given to the structure through two ways: (a) embedding optical fibers protected by a 6tex aramid fiber sleeve into a casing structure; b) the optical fiber and the carbon fiber or the aramid fiber are woven into a fabric structure, an intermediate material prepreg is prepared, and the optical fiber sensor is introduced into a structure of a containing casing, as shown in figure 1, two technical route diagrams of the invention for introducing the optical fiber sensor are shown. The distance between two adjacent gratings on each optical fiber along the circumferential direction is 0.5-1.5 m.
Before embedding operation, mounting a high-temperature-resistant Polytetrafluoroethylene (PTFE) sleeve at a predicted leading-out position to prevent an optical fiber leading-out port from being broken and failed in an autoclave after embedding, and preventing a protection device from entering a product structure; and is sealed by silicon rubber which can resist the temperature of 200 ℃ to prevent the resin glue from flowing out of the sleeve in the curing process, as shown in figure 3, the schematic diagram of the optical fiber sensor leading-out protection device in the invention is shown.
In an optional embodiment of the invention, a 6tex aramid fiber sleeve is adopted to protect an optical fiber sensor, or an optical fiber and a carbon fiber are woven into a fabric structure to prepare an intermediate material prepreg, wherein the fabric form is eight-piece three-fly-forged-grain fabric; the 6tex aramid fiber is aramid III fiber with strength greater than 4.4GPa and modulus greater than 140 GPa.
In an optional embodiment of the invention, the specification of the carbon fiber can be one or a combination of T800-12K carbon fiber, M40 high-modulus carbon fiber and T700-24K carbon fiber, and the selection strategy is mainly based on the use working condition of the containing case; the fabric is eight pieces of three-fly-forged-grain fabric, and the optical fiber sensors are distributed in the warp direction of the forged-grain fabric.
In an optional embodiment of the invention, the environmental protection layer adopts T800/603B or T800-XW/603B prepreg; T800/603B or T800-XW/603B prepreg is adopted in the whole area of the casing.
The optical fiber of the internal etching grating meets the following requirements:
in an optional embodiment of the invention, the FBG strain sensor array is packaged, the measuring range of the FBG strain sensor is +/-4000 mu epsilon-6000 mu epsilon, the precision is 1 mu epsilon, and the strain sensitivity coefficient is 0.9-1.0 pm/mu epsilon; the FBG temperature sensor after packaging measures the temperature at the working wavelength of 350 ℃ at the maximum, the precision is 0.1 ℃, and the temperature sensitivity coefficient is 8-12 pm/DEG C;
the chirp grating sensing array has a wavelength range of 1530-1580nm, a sampling frequency of 30kHz and a vibration measuring range of 0-5000 Hz;
the sampling frequency of a signal acquisition system of the F-P acoustic sensor is 200kHz, and the measuring range of the acoustic sensor is 100 kHz.
The manufacturing method of the intelligent sensing resin-based housing comprises the following steps that the housing is implemented by adopting the following two schemes according to different modes of introducing the optical fiber sensor:
aramid fiber casing protection mode
(1) Paving an environment protection layer with the thickness of h1 on the whole casing, and realizing by adopting automatic wire paving, for example, adopting T800/603B prepreg as a material; an optical fiber sensor protected by a 6tex aramid fiber sleeve is respectively and annularly arranged at the R corners of the front flange and the rear flange, and gratings such as strain, sound emission, temperature and the like are etched in a single optical fiber sensor;
(2) paving H1-thick aramid prepreg (F-8H3/603B) in a containing region in an automatic silk laying or winding mode; in the process of paving, after the aramid prepreg with the thickness of h2 is paved, an optical fiber sensor protected by a 6tex aramid fiber sleeve is arranged in the axial direction of the engine as shown in fig. 4, and gratings such as etching strain, acoustic emission, temperature and the like are arranged in a single optical fiber sensor. In an optional embodiment of the present invention, optical fibers of the inner etching grating are circumferentially arranged at the thickness inflection point, as shown in fig. 4, 4 optical fiber sensors are arranged in the embodiment;
(3) sucking and compacting for 1 time;
(4) adopting T800/603B prepreg in a containing area, and automatically spreading and forming to h3 thickness;
(5) sucking and compacting for 1 time;
(6) and automatically spreading or winding T800/603B prepreg in the integral area of the casing to form H2 thickness. After the thickness of the layering h4 is measured, a 6tex aramid fiber sleeve protection optical fiber sensor is respectively arranged at the R corners of the front and rear flanges in the circumferential direction, the 6tex aramid fiber sleeve protection optical fiber sensor is arranged in the axial direction of the engine as shown in figure 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single optical fiber sensor.
In an optional embodiment of the invention, the ply thickness h1 is 1mm-2mm, the ply thickness h2 is 1mm-2mm, the ply thickness h3 is 4mm-8mm, and the ply thickness h4 is 8mm-13 mm. H1 is 9-10mm, H2 is 9-14 mm.
(7) Adopting a curing system as shown in figure 5 to cure the casing, wherein the heating rate is 20 +/-5 ℃/h, the temperature is kept at 180 ℃ for 4 hours, the curing and heat-preserving time can be properly shortened or prolonged according to the requirement, the heating and cooling rate is 30 +/-5 ℃/h, the machine is stopped at 80 ℃ for pressure relief, and the casing is taken out of the tank at 50 ℃; and (3) applying the autoclave pressure of 0.6MPa while heating, and maintaining the vacuum until the heat preservation is finished.
(8) Dimensional measurement and non-destructive testing
And (3) after the product is cured, demoulded and cleaned, carrying out size measurement and ultrasonic nondestructive testing.
The nondestructive testing method comprises the following steps: DqES219-88 ultrasonic flaw detection method for carbon ring oxygen composite material.
(9) And machining
And processing the upper end face and the lower end face, the thickened area and the like according to the requirements of a drawing.
(II) optical fiber and carbon fiber mixed weaving scheme
(1) Paving an environment protection layer with the thickness of h1 on the whole casing, and realizing by adopting automatic wire paving, for example, adopting T800/603B prepreg as a material; and the front flange and the rear flange are annularly woven at the R angle by using optical fibers and carbon fibers, and gratings such as strain, acoustic emission, temperature and the like are etched in a single optical fiber sensor.
(2) Paving H1-thick aramid prepreg (F-8H3/603B) in a containing area in an automatic silk paving or winding manner; in the paving process, after the aramid prepreg with the thickness of h2 is paved, the optical fiber and aramid fiber mixed fabric is used, the optical fiber sensor protected by the aramid fiber sleeve with the length of 6tex is arranged in the axial direction of the engine as shown in figure 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single optical fiber sensor. In an optional embodiment of the present invention, optical fibers of the inward-etched grating are circumferentially arranged at the thickness inflection point, as shown in fig. 4, 4 optical fiber sensors are arranged in the embodiment;
(3) sucking and compacting for 1 time;
(4) adopting T800/603B prepreg in a containing area, and automatically spreading and forming to h3 thickness;
(5) sucking and compacting for 1 time;
(6) and adopting T800/603B or T800-XW/603B prepreg in the integral area of the machine box, and automatically spreading or winding to form H2 thickness. After the thickness of the layer h4 is laminated, using optical fiber and carbon fiber mixed woven fabric, and arranging optical fiber sensors at the R corners of the front and rear flanges in a circumferential direction; the fiber and aramid fiber mixed fabric is used, the fiber sensor is arranged in the axial direction of the engine as shown in figure 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single fiber sensor.
In an optional embodiment of the invention, the ply thickness h1 is 1mm-2mm, the ply thickness h2 is 1mm-2mm, the ply thickness h3 is 4mm-8mm, and the ply thickness h4 is 8mm-13 mm. H1 is 9-10mm, H2 is 9-14 mm.
(7) Curing the casing by adopting a curing system shown in figure 5, wherein the heating rate is 20 +/-5 ℃/h, the temperature is kept at 180 ℃ for 4 hours, the heating and cooling rate is 30 +/-5 ℃/h, the machine is stopped at 80 ℃ for pressure relief, and the casing is taken out of the tank at 50 ℃; and (3) applying the autoclave pressure of 0.6MPa while heating, and maintaining the vacuum until the heat preservation is finished.
(8) Dimensional measurement and non-destructive testing
And (3) after the product is cured, demoulded and cleaned, carrying out size measurement and ultrasonic nondestructive testing.
The nondestructive testing method comprises the following steps: DqES219-88 ultrasonic flaw detection method for carbon ring oxygen composite material.
(9) And machining
And processing the upper end face and the lower end face, the thickened area and the like according to the requirements of a drawing.
Example 1
a) Paving an environment protection layer of 2mm of the whole casing, and realizing by adopting an automatic wire paving or winding mode, wherein the adopted material is T800/603B or T800-XW/603B prepreg; and optical fiber sensors protected by a 6tex aramid fiber sleeve are respectively and annularly arranged at the R corners of the front flange and the rear flange, and gratings such as etching strain, acoustic emission, temperature and the like are arranged in a single optical fiber sensor.
b) Laying 10mm aramid prepreg (F-8H3/603B) in a containing region in an automatic laying or winding mode; in the process of paving, after the 1mm aramid prepreg is paved, an optical fiber sensor protected by a 6tex aramid casing pipe is arranged in the axial direction of the engine as shown in fig. 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single optical fiber sensor.
c) Sucking and compacting for 1 time;
d) adopting T800/603B or T800-XW/603B prepreg in a containing area, and automatically laying or winding for molding for 6 mm;
e) sucking and compacting for 1 time;
f) and (3) adopting T800/603B or T800-XW/603B prepreg in the integral area of the case, and automatically spreading or winding for forming by 10 mm. After the secondary paving layer is paved for 9.5mm, an optical fiber sensor protected by a 6tex aramid fiber sleeve is respectively arranged at the R corners of the front flange and the rear flange in the circumferential direction, the optical fiber sensor protected by the 6tex aramid fiber sleeve is arranged in the axial direction of the engine as shown in figure 4, and gratings such as etching strain, acoustic emission, temperature and the like are arranged in a single optical fiber sensor.
g) Curing the casing by adopting a curing system shown in figure 5, wherein the heating rate is 20 +/-5 ℃/h, the temperature is kept at 180 ℃ for 4 hours, the heating rate is 30 +/-5 ℃/h, the machine is stopped at 80 ℃ for pressure relief, and the casing is taken out of the tank at 50 ℃; and (3) applying the autoclave pressure of 0.6MPa while heating, and maintaining the vacuum until the heat preservation is finished.
h) Dimensional measurement and non-destructive testing
And (3) after the product is cured, demoulded and cleaned, carrying out size measurement and ultrasonic nondestructive testing.
The nondestructive testing method comprises the following steps: DqES219-88 ultrasonic flaw detection method for carbon ring oxygen composite material.
i) Machining
Example 2
a) Paving an environment protection layer of 2mm on the whole casing, and winding, wherein the adopted material is T800-XW/603B prepreg; and the front flange and the rear flange are annularly woven at the R angle by using optical fibers and carbon fibers, and gratings such as strain, acoustic emission, temperature and the like are etched in a single optical fiber sensor.
b) Covering 10mm aramid fiber prepreg (F-8H3/603B) in a wrapping mode in a containing area; in the process of paving and covering, after the 1mm aramid prepreg layer is laid, the fiber and aramid fiber mixed fabric is used, the fiber sensor protected by the 6tex aramid sleeve is arranged in the axial direction of the engine as shown in figure 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single fiber sensor.
c) Sucking and compacting for 1 time;
d) winding and molding a T800-XW/603B prepreg in a containing area for 6 mm;
e) sucking and compacting for 1 time;
f) T800-XW/603B prepreg is adopted in the whole area of the machine box, and the prepreg is wound and molded by 10 mm. After the layer is laid for 9.5mm, using optical fiber and carbon fiber mixed fabric, and arranging optical fiber sensors at the R corners of the front flange and the rear flange in a circumferential direction; the fiber and aramid fiber mixed fabric is used, the fiber sensor is arranged in the axial direction of the engine as shown in figure 4, and gratings such as strain, acoustic emission, temperature and the like are etched in a single fiber sensor.
g) Curing the casing by adopting a curing system shown in figure 5, wherein the heating rate is 20 +/-5 ℃/h, the temperature is kept at 180 ℃ for 4 hours, the heating rate is 30 +/-5 ℃/h, the machine is stopped at 80 ℃ for pressure relief, and the casing is taken out of the tank at 50 ℃; and (3) applying the autoclave pressure of 0.6MPa while heating, and maintaining the vacuum until the heat preservation is finished.
h) Dimensional measurement and non-destructive testing
And after the product is cured, demoulded and cleaned, carrying out size measurement and ultrasonic nondestructive testing.
The nondestructive testing method comprises the following steps: DqES219-88 ultrasonic flaw detection method for carbon epoxy composite material.
i) Machining
And processing the upper end face and the lower end face, the thickened area and the like according to the requirements of a drawing.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.

Claims (13)

1. A manufacturing method of an intelligent sensing resin-based containing casing is characterized in that the containing casing comprises a flange area, a containing area with middle variable thickness and a non-containing area, and in the manufacturing process, the manufacturing method comprises the following steps,
and adding the laying of a plurality of optical fibers in the layering process of the flange area and the middle variable-thickness containing area, curing to form a resin-based containing casing, and etching the grating in the optical fibers.
2. The manufacturing method of the smart perception resin-based containment casing as claimed in claim 1, wherein: the grating etched in the optical fiber comprises a strain grating, an acoustic emission grating or a temperature grating; the distance between two adjacent gratings on each optical fiber along the circumferential direction is 0.5-1.5 m.
3. The manufacturing method of the smart perception resin-based containment casing as claimed in claim 1, wherein: the laying of the optical fibres in the fibre lay-up process in the flange region, the intermediate variable thickness containment region comprises laying the optical fibres after loading them into an aramid fibre sleeve, and/or,
and (3) weaving the optical fiber and the carbon fiber or the optical fiber and the aramid fiber into a fabric.
4. The manufacturing method of the smart perception resin-based containment casing as claimed in claim 3, wherein: the aramid fiber sleeve is a 6tex aramid fiber sleeve, and the mixed fabric is eight pieces of three-fly-forged-grain fabric.
5. The method for manufacturing a smart feel resin based containment case as claimed in claim 1, comprising:
the integral region of the containing case is coated with prepreg to the required thickness h1, and an optical fiber of an inner etching grating is arranged at the R corners of the flange regions at the two ends in the circumferential direction;
laying prepreg in a middle accommodation area with variable thickness to a required thickness h2, and arranging a plurality of optical fibers of the internal etched grating at intervals in a circumferential direction;
sucking and compacting the glue;
continuously laying the prepreg to the required thickness h3 in the middle thickness containing area;
sucking and compacting the glue;
the integral region of the containing case is coated with prepreg to the required thickness h4, and an optical fiber of an inner etching grating is arranged at the R corners of the flange regions at the two ends in the circumferential direction;
and (5) curing.
6. The method of manufacturing a smart feel resin based containment case of claim 5, wherein the manner of routing the optical fiber at the two end flange regions and the intermediate thickness containment region comprises: the optical fiber is loaded into the aramid fiber sleeve, and/or,
the optical fiber and the carbon fiber or the optical fiber and the aramid fiber are mixed and woven into a fabric;
the aramid fiber sleeve is a 6tex aramid fiber sleeve; the mixed woven fabric is eight pieces of three-fly-forged-grain fabric.
7. The manufacturing method of the intelligent sensing resin-based containing casing as claimed in claim 6, wherein the 6tex aramid fiber is aramid III fiber, the strength is greater than 4.4GPa, and the modulus is greater than 140 GPa;
the carbon fiber is one or the combination of T800-12K carbon fiber, M40 high modulus carbon fiber and T700-24K carbon fiber.
8. The manufacturing method of a smart perception resin-based containment casing according to claim 1 or 6, wherein the intermediate thickness-varying containment region is provided with an internally etched grating of optical fibers circumferentially arranged at a thickness inflection point.
9. The method for manufacturing a smart perception resin-based containment casing according to claim 6, wherein the etched grating in the optical fiber comprises a strain, acoustic emission or temperature grating; the distance between two adjacent gratings on each optical fiber along the circumferential direction is 0.5-1.5 m.
10. The method of claim 6, wherein the ply thickness h1 is 1mm to 2mm, the ply thickness h2 is 1mm to 2mm, the ply thickness h3 is 4mm to 8mm, and the ply thickness h4 is 8mm to 13 mm.
11. The manufacturing method of the intelligent sensing resin-based housing case according to claim 1 or 6, wherein the optical fiber loaded with the aramid fiber sleeve and the fiber and fiber mixed fabric are provided with a polytetrafluoroethylene PTFE sleeve at the expected leading-out position, so that the optical fiber leading-out port is prevented from being cracked and failed in an autoclave after being embedded, and a protection device is prevented from entering a product structure; and silicon rubber with the temperature resistance of 200 ℃ or above is adopted for sealing, so that the resin rubber is prevented from flowing out of the sleeve in the curing process.
12. The manufacturing method of the intelligent sensing resin-based containment casing according to claim 1 or 6, wherein the optical fiber of the internal etched grating satisfies the following conditions:
the FBG strain sensor array is packaged, the measuring range of the FBG strain sensor is +/-4000 mu epsilon-6000 mu epsilon, the precision is 1 mu epsilon, and the strain sensitivity coefficient is 0.9-1.0 pm/mu epsilon; the FBG temperature sensor after packaging measures the temperature at the working wavelength of 350 ℃ at the maximum, the precision is 0.1 ℃, and the temperature sensitivity coefficient is 8-12 pm/DEG C;
the chirp grating sensing array has a wavelength range of 1530-1580nm, a sampling frequency of 30kHz and a vibration measuring range of 0-5000 Hz;
the sampling frequency of a signal acquisition system of the F-P acoustic sensor is 200kHz, and the measuring range of the acoustic sensor is 100 kHz.
13. A smart-feel resin-based containment case, obtained by the manufacturing method of any one of claims 1 to 12.
CN202210457741.7A 2022-04-27 2022-04-27 Manufacturing method of intelligent sensing resin-based containing casing and containing casing Pending CN115015382A (en)

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CN202210457741.7A CN115015382A (en) 2022-04-27 2022-04-27 Manufacturing method of intelligent sensing resin-based containing casing and containing casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210457741.7A CN115015382A (en) 2022-04-27 2022-04-27 Manufacturing method of intelligent sensing resin-based containing casing and containing casing

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CN115015382A true CN115015382A (en) 2022-09-06

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