CN113523735B - Preparation method of injector - Google Patents
Preparation method of injector Download PDFInfo
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- CN113523735B CN113523735B CN202111020617.6A CN202111020617A CN113523735B CN 113523735 B CN113523735 B CN 113523735B CN 202111020617 A CN202111020617 A CN 202111020617A CN 113523735 B CN113523735 B CN 113523735B
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- assembly
- nozzle
- oxygen
- ignition
- injector
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- 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
- B23P15/008—Rocket engine parts, e.g. nozzles, combustion chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0646—Solder baths
Abstract
The invention relates to a preparation method of an injector, which comprises the following steps: 1) assembling and welding the oxygen baffle nozzle and the methane baffle nozzle into a baffle nozzle assembly by adopting vacuum brazing; 2) assembling an oxygen primary nozzle and a methane primary nozzle into a primary nozzle assembly; 3) combining the insole, a pressure guiding pipe, a panel, a compression nut, a main nozzle assembly and a partition plate nozzle assembly into an insole assembly, 4) welding a nozzle, a pulse pressure measuring nozzle, an oxygen inlet elbow and a liquid oxygen top cover into an oxygen top cover assembly by argon arc welding, and processing the end face of the oxygen top cover assembly, which is butted with the upper end face of the insole, to remove the thickness; 5) the middle sole assembly, the oxygen top cover assembly, the bearing cone, the ignition bent pipe, the DN6 connecting pipe nozzle, the vibration measuring support, the pulsating pressure connecting pipe, the injector protective cover, the oxygen inlet protective cover, the bearing cone protective cover, the air outlet protective cover and the ignition opening protective cover are combined into the injector. The method can greatly shorten the preparation period, reduce the preparation difficulty and improve the production efficiency and the production quality.
Description
Technical Field
The invention belongs to the technical field of aerospace, and particularly relates to a preparation method of an injector.
Background
The injector belongs to an important component of a fuel gas generator and is used for atomizing, mixing and combusting propellant of a rocket engine and a plane engine to generate high-temperature high-pressure fuel gas with high energy, and the high-temperature high-pressure fuel gas can do work to drive a turbine to run at high speed by further expanding, so that a turbopump is driven to drive the engine to work, and power is provided for the rocket or the plane.
The injector is used as an important component of a high-temperature and high-pressure part, has very important functions, has various types and quantities of parts, mainly comprises a middle sole assembly part, an oxygen top cover assembly, a bearing cone, an ignition bent pipe, a DN6 filler neck, a vibration measuring support, protective covers and the like, and also has a plurality of problems in the process of preparing the parts, such as difficult processing of the ignition bent pipe, deformation of a panel thin-wall part, insufficient brazing seam strength in vacuum brazing and the like, which increase the difficulty for the preparation process, cause low production efficiency and influence the processing period, and simultaneously, the quality of the prepared injector is difficult to ensure.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the preparation method of the injector, which can greatly shorten the preparation period, reduce the preparation difficulty and improve the production efficiency and the production quality.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method of preparing an injector, the method comprising the steps of:
1a, arranging first solder material grooves on 12 channel ribs arranged at one end of an oxygen partition plate nozzle, arranging at least two second solder material grooves on the excircle at the other end of the oxygen partition plate nozzle, and arranging solder in the first solder material grooves and the second solder material grooves;
1b, sleeving an oxygen partition plate nozzle into the inner cavity of the methane partition plate nozzle from one end provided with a second solder pot, wherein one end provided with the second solder pot extends out of the outer side of one end of the methane partition plate nozzle, and one end provided with a channel rib of the oxygen partition plate nozzle is flush with the other end port of the methane partition plate nozzle;
1c, placing the assembled oxygen baffle nozzle and methane baffle nozzle into a vacuum brazing furnace for vacuum brazing to obtain a baffle nozzle assembly;
3a, processing the middle sole, and lathing the upper end surface of the middle sole and reserving allowance; the method comprises the steps of machining and increasing the aperture of an original inclined hole used for inserting a pressure guiding pipe in the middle sole, and machining a part sleeve according to the increased aperture of the inclined hole by a lathe, wherein at least two fourth solder material grooves are formed in the outer circle and the inner wall of the part sleeve;
3b, processing a panel, roughly processing the raw material into a basin-shaped structural member by adopting a lathe, leaving a finish turning clamping technological table at the edge of the basin-shaped structural member, tightly pressing the clamping technological table by adopting a lathe fixing tool, and processing the wall thickness of the basin-shaped structural member to be 3 mm; filling the basin cavity of the basin-shaped structural member by adopting a milling and boring tool, clamping and fixing, and milling a boring hole of the basin-shaped structural member;
3c, connecting the compression nut to the partition plate nozzle assembly by mechanical assembly; connecting and combining one end of the main nozzle assembly and one end of the partition plate nozzle assembly with a panel by mechanical assembly, arranging brazing filler metal in a second brazing filler metal groove at the other end of the main nozzle assembly and a third brazing filler metal groove at the other end of the partition plate nozzle assembly, and connecting one end of the brazing filler metal of the main nozzle assembly and the partition plate nozzle assembly with the middle sole; penetrating a pressure guiding pipe into the panel from the inclined hole of the midsole; filling brazing filler metal in a fourth brazing filler metal groove on the part sleeve, and putting the part sleeve into a circular seam between a pressure guiding pipe and a middle bottom inclined hole to obtain a middle bottom assembly frame;
3d, charging the insole assembly frame by using a charging tool in an over-positioning mode, and brazing in a furnace;
5a, cutting a square raw material into a first elbow pipe flange blank, turning one end of the first elbow pipe flange blank into a cylinder by adopting turning, and processing a through hole in the radial center of the first elbow pipe flange blank by adopting turning to obtain a first elbow pipe flange;
5b, cutting the square raw material into a second elbow pipe flange blank, turning one end of the second elbow pipe flange blank into a cylinder by adopting turning, and processing a through hole in the radial center of the second elbow pipe flange blank by adopting turning to obtain a second elbow pipe flange;
5c, cutting the bar stock into an ignition pipeline blank, machining a through hole in the radial center of the ignition pipeline blank by adopting turning, and bending the ignition pipeline blank to obtain an ignition bent pipe pipeline;
5d, respectively connecting the turned end of the first bent pipe flange and the turned end of the second bent pipe flange with two ends of an ignition bent pipe pipeline by using a tool in a positioning manner, and welding by adopting argon arc welding to obtain an ignition bent pipe;
6a, contacting the upper end face of the middle sole assembly with the turning face of the oxygen top cover assembly, and performing assembly welding connection by adopting argon arc welding to obtain an assembly I;
6b, respectively welding a DN6 pipe connecting nozzle, a vibration measuring support and a pulsating pressure connecting nozzle on the part, corresponding to the first assembly, of the first assembly by adopting argon arc welding to obtain a second assembly;
6c, mechanically assembling and connecting the bearing cone and the top of the oxygen top cover component of the assembly II to obtain an assembly III;
6d, penetrating the ignition bent pipe into the third assembly part, and mechanically assembling and connecting two ends of the ignition bent pipe with the third assembly part to obtain a fourth assembly part;
and 6e, mechanically assembling and connecting the injector protective cover, the oxygen inlet protective cover, the bearing cone protective cover, the blow-out port protective cover and the ignition port protective cover with the corresponding parts on the assembly IV respectively to obtain the injector.
Preferably, in step 1, the vacuum brazing includes vacuum pumping, heating, brazing and cooling, wherein the vacuum pumping is cold state vacuum pumping, so that the vacuum degree in the furnace reaches 5 × 10-2PerPa, working vacuum degree of 8X 10-2Pa; heating to 450 deg.C at 240 deg.C/h for 20 min; heating to 950 deg.C at 300 deg.C/h, and maintaining for 90 min; heating to 1025 ℃ at the speed of 360 ℃/h to start brazing; brazing, wherein the temperature is 1025 +/-5 ℃, and the brazing is kept for 15 min; cooling, filling high-purity gas into the furnace after the furnace is cooled to 600 ℃ along with the furnace to ensure that the pressure in the furnace reaches 8 x 104After the pressure is/Pa, starting a fan to cool to 65 ℃ and discharging.
Preferably, in the step 1, the depth of the first solder groove is 0.8mm, and the width of the first solder groove is 0.6 mm; the depth of the second brazing filler metal groove is 0.5mm, and the width of the second brazing filler metal groove is 1 mm.
Preferably, in step 2, the third solder groove has a depth of 0.5mm and a width of 1 mm.
Preferably, in step 3, the diameter of the outer circle of the part sleeve is smaller than the diameter of the increased inclined hole, and the diameter of the inner circle of the part sleeve is larger than the diameter of the outer circle of the pressure guiding pipe.
Preferably, in step 3, the thickness of the upper end face of the middle sole with a margin is 1 mm.
Preferably, in step 4, the oxygen cap assembly is turned 1mm from the upper end of the midsole in an end-to-end manner.
Preferably, in step 5, the length of the cut first elbow pipe flange blank is 48mm, the length of the cut second elbow pipe flange blank is 74mm, and the length of the cut ignition pipeline blank is 105.3 mm; the diameter of the turned cylinder is 20mm, the aperture of the turned through hole is 12mm, and the diameter of the bar stock is 20 mm; the bending angle of the ignition pipeline blank is 70 degrees.
Preferably, in step 6, an oxygen inlet elbow avoidance opening for avoiding the oxygen inlet elbow and a square hole for penetrating through the ignition elbow are formed in the bearing cone.
The preparation method of the injector has the technical effects and advantages that:
1. according to the preparation method of the injector provided by the invention, at least two brazing filler metal grooves used for presetting brazing filler metal are processed on the brazing excircle of the oxygen partition plate nozzle, the channel ribs at 12 positions and the brazing excircle of the oxygen main nozzle, so that the brazing filler metal can be prevented from overflowing to influence the brazing quality during brazing.
2. According to the preparation method of the injector provided by the invention, the diameter of the inclined hole for inserting the pressure guiding pipe in the middle sole is processed and increased, so that the assembly difficulty of inserting the pressure guiding pipe into the inclined hole in the middle sole through the hole in the panel can be reduced, and the controllability is strong.
3. According to the preparation method of the injector, the ignition elbow is formed by welding the ignition elbow into three parts, so that the ignition elbow is converted into flanges and pipelines for processing, the processing difficulty is effectively reduced, and the problem of inconvenience in actual production is solved.
4. According to the preparation method of the injector provided by the invention, the allowance of the upper end face of the middle bottom is kept to be 1mm, and the end face of the oxygen top cover assembly butted with the upper end face of the middle bottom is removed by 1mm, so that the vacuum brazing is conveniently changed into argon arc welding, the problems of brazing seam cracking and part deformation caused by insufficient brazing seam strength in the vacuum brazing are avoided, and the welding quality is effectively improved.
Drawings
FIG. 1 is a schematic diagram of an injector configuration prepared using the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of a midsole assembly using an injector made according to the present invention;
FIG. 4 is a schematic diagram of the oxygen cap assembly construction of an injector made using the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
FIG. 6 is a schematic diagram of a force bearing cone structure of an injector prepared by the invention;
FIG. 7 is a schematic view of a firing elbow configuration for an injector made using the present invention;
FIG. 8 is a schematic view of a primary nozzle assembly for use in making a midsole assembly according to the present invention;
FIG. 9 is a schematic diagram of a diaphragm nozzle assembly for use in making a midsole assembly according to the present invention;
FIG. 10 is a schematic view of the assembly of the midsole and the pressure introducing tube for preparing a midsole assembly using the present invention;
FIG. 11 is a schematic diagram of a face plate structure for use in making a midsole assembly according to the invention.
The reference numbers in the figures: 1. a midsole assembly; 1-1, a middle sole; 1-2, a pressure guiding pipe; 1-3, a panel; 1-4, pressing a nut; 1-5, a primary nozzle assembly; 1-5-1, an oxygen main nozzle; 1-5-2, a methane main nozzle; 1-6, a diaphragm nozzle assembly; 1-6-1, an oxygen baffle nozzle; 1-6-2, a methane diaphragm nozzle; 1-7, part set; 2. an oxygen cap assembly; 2-1, a filler neck; 2-2, measuring a pulsating pressure nozzle; 2-3, an oxygen inlet elbow; 2-4, a liquid oxygen top cover; 3. a bearing cone; 3-1, square holes; 3-2, an oxygen inlet bent pipe avoidance opening; 4. an ignition elbow; 4-1, a first elbow flange; 4-2, bending a pipeline; 4-3, a second elbow flange; 5. DN6 filler neck; 6. a vibration measurement support; 7. an injector protection cover; 8. an oxygen inlet protective cover; 9. a force bearing cone protective cover; 10. an outlet protection cover; 11. an ignition port protection cover; 12. pulsating pressure nipple.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are given in conjunction with the accompanying drawings.
Referring to fig. 1 to 2, an injector is shown, which is prepared by a method comprising the steps of:
1a, arranging a first solder groove on each of 12 channel ribs arranged at one end of an oxygen partition nozzle 1-6-1, arranging at least two second solder grooves on the excircle at the other end of the oxygen partition nozzle 1-6-1, and arranging solder in the first solder groove and the second solder groove;
1b, sleeving an oxygen partition plate nozzle 1-6-1 into an inner cavity of the methane partition plate nozzle 1-6-2 from one end provided with a second solder pot, wherein one end provided with the second solder pot extends out of the outer side of one end of the methane partition plate nozzle 1-6-2, and one end of the oxygen partition plate nozzle 1-6-1 provided with a channel rib is flush with the other end of the methane partition plate nozzle 1-6-2;
1c, placing the assembled oxygen partition plate nozzle 1-6-1 and methane partition plate nozzle 1-6-2 into a vacuum brazing furnace for vacuum brazing to obtain a partition plate nozzle assembly 1-6;
in specific implementation, the vacuum brazing comprises vacuumizing, heating, brazing and cooling, wherein the vacuumizing is cold vacuumizing, so that the vacuum degree in a furnace reaches 5 multiplied by 10-2PerPa, working vacuum degree of 8X 10-2Pa; heating to 450 deg.C at 240 deg.C/h for 20 min; heating to 950 deg.C at 300 deg.C/h, and maintaining for 90 min; heating to 1025 ℃ at the speed of 360 ℃/h, and starting brazing; brazing, namely brazing at 1025 +/-5 ℃ for 15 min; cooling, filling high-purity gas into the furnace after the furnace is cooled to 600 ℃ along with the furnace to ensure that the pressure in the furnace reaches 8 x 104After the pressure is/Pa, starting a fan to cool to 65 ℃ and discharging.
In specific implementation, the high-purity gas is Ar more than or equal to 99.999 percent or N2≥99.999%。
In specific implementation, referring to fig. 9, the depth of the first solder pot is 0.8mm, and the width of the first solder pot is 0.6 mm; the depth of the second brazing filler metal groove is 0.5mm, and the width of the second brazing filler metal groove is 1 mm.
When the brazing method is specifically implemented, the brazing filler metal is preset in the brazing filler metal groove, and the brazing filler metal can be prevented from overflowing to influence brazing quality during brazing. The partition nozzle assemblies 1-6 are placed in a furnace in a horizontal mode, the amount of brazing filler metal in the brazing filler metal groove is properly controlled, the blocking of the opening parts of the flow channels of the partition nozzle assemblies 1-6 by the brazing filler metal can be avoided in the brazing process, and the brazing quality is effectively improved.
in specific implementation, as shown in FIG. 8, the oxygen main nozzle 1-5-1 and the methane main nozzle 1-5-2 are mechanically assembled and screwed by hand during assembly; at least two third brazing filler metal grooves are formed in the excircle of one end, with the diameter being 1-5-1, of the oxygen main nozzle, the depth of each third brazing filler metal groove is 0.5mm, and the width of each third brazing filler metal groove is 1 mm.
3a, processing the middle sole 1-1, and lathing the upper end face of the middle sole 1-1 with a margin; the original hole diameter of an inclined hole used for inserting a pressure guiding pipe 1-2 on the middle sole 1-1 is processed and increased, and a part sleeve 1-7 is machined according to the increased hole diameter of the inclined hole;
in specific implementation, as shown in fig. 10, the pressure guiding pipe 1-2 is a bent pipeline, so that the assembly difficulty is high, the inclined hole in the midsole 1-1 is increased, the assembly difficulty that the pressure guiding pipe 1-2 is inserted into the inclined hole in the midsole 1-1 through the hole in the panel 1-3 can be reduced, and the controllability is high.
3b, processing the panel 1-3, roughly processing the raw material into a basin-shaped structural member by adopting a lathe, reserving a finish turning clamping process table at the edge of the basin-shaped structural member, tightly pressing the clamping process table by adopting a lathe fixing tool, and processing the wall thickness of the basin-shaped structural member to be 3 mm; filling the pelvic cavity of the basin-shaped structural member by adopting a boring milling tool, clamping and fixing, and milling the bored hole of the basin-shaped structural member;
when the milling and boring tool is specifically implemented, the basin cavity of the basin-shaped structural member is filled with the milling and boring tool, the basin-shaped structural member can be conveniently clamped and fixed when the milling and boring tool is used for milling and boring, and the basin-shaped structural member can be prevented from being deformed during machining.
3c, connecting the compression nuts 1-4 to the partition plate nozzle assemblies 1-6 by adopting mechanical assembly; one end of each of the main nozzle assemblies 1-5 and the partition plate nozzle assemblies 1-6 is connected and combined with the panel 1-3 by mechanical assembly, the other ends of the main nozzle assemblies 1-5 and the partition plate nozzle assemblies 1-6 are connected with the middle sole 1-1, and brazing filler metal is arranged in a contact seam; penetrating the pressure guiding pipe 1-2 into the panel 1-3 from the inclined hole of the midsole 1-1; filling brazing filler metal in a fourth brazing filler metal groove on the part sleeve 1-7, and filling the part sleeve 1-7 into a circular seam between the pressure introduction pipe 1-2 and the inclined hole of the insole 1-1 to obtain an insole assembly 1 frame;
3d, charging the frame of the insole assembly 1 by using a charging tool in an over-positioning mode, and brazing in a furnace, positioning and turning a clamping process table on a panel 1-3 of the brazed frame of the insole assembly 1 by using a lathe tool to obtain an insole assembly 1;
during specific implementation, the furnace is charged in an over-positioning mode by using the furnace charging tool during charging, so that the partition plate nozzle assemblies 1-6 are not stressed or displaced, and the end surfaces of the partition plate nozzle assemblies 1-6 are ensured to be on the same plane by the tool bottom plate, thereby improving the brazing precision of products.
In specific implementation, the diameter of the outer circle of the part sleeve 1-7 is smaller than the diameter of the increased inclined hole, and the diameter of the inner circle of the part sleeve 1-7 is larger than the diameter of the outer circle of the pressure guiding pipe 1-2; at least two fourth brazing filler metal grooves are formed in the outer circles and the inner walls of the part sleeves 1-7.
In specific implementation, the thickness of the allowance left on the upper end surface of the middle sole 1-1 is 1 mm.
in specific implementation, the turned end face of the oxygen top cover component 2, which is in butt joint with the upper end face of the middle sole 1-1, has the size of 1 mm.
When the method is specifically implemented, the allowance of the upper end face of the insole 1-1 is kept to be 1mm, the end face of the oxygen top cover assembly 2 butted with the upper end face of the insole 1-1 is removed by 1mm, vacuum brazing can be conveniently changed into argon arc welding, the problems that brazing seams crack and parts deform due to insufficient brazing seam strength when vacuum brazing is adopted are avoided, and the welding quality is effectively improved.
5a, cutting a square raw material into a first elbow flange blank, turning one end of the first elbow flange blank into a cylinder by adopting turning, and processing a through hole at the radial center of the first elbow flange blank by adopting turning to obtain a first elbow flange 4-1;
5b, cutting the square raw material into a second elbow pipe flange blank, turning one end of the second elbow pipe flange blank into a cylinder by adopting turning, and processing a through hole in the radial center of the second elbow pipe flange blank by adopting turning to obtain a second elbow pipe flange 4-3;
5c, cutting the bar stock into an ignition pipeline blank, machining a through hole in the radial center of the ignition pipeline blank by adopting turning, and bending the ignition pipeline blank to obtain an ignition bent pipe pipeline 4-2;
5d, respectively connecting the turned end of the first elbow flange 4-1 and the turned end of the second elbow flange 4-3 with the two ends of the ignition elbow pipeline 4-2 by using a tool in a positioning manner, and welding by adopting argon arc welding to obtain the ignition elbow 4;
in specific implementation, referring to fig. 7, the length of the cut first elbow pipe flange blank is 48mm, the length of the cut second elbow pipe flange blank is 74mm, and the length of the cut ignition pipeline blank is 105.3 mm; the diameter of the turned cylinder is 20mm, the aperture of the turned through hole is 12mm, and the diameter of the bar stock is 20 mm; the bending angle of the ignition pipeline blank is 70 degrees.
During specific implementation, because square flanges are arranged at two ends of the ignition elbow 4, the pipeline is of a 70-degree elbow structure, actual processing and production are not convenient, the ignition elbow 4 is divided into three parts to be welded, the ignition elbow 4 is converted into the flange and the pipeline, the relative positions of the flange ports at two ends are determined by utilizing the tool, the assembly welding precision of the ignition elbow 4 can be finally ensured, the preparation quality and efficiency are improved, the preparation difficulty is effectively reduced, and the problem of actual production not convenient is solved.
6a, contacting the upper end surface of the insole 1-1 of the insole assembly 1 with the turning surface of the oxygen top cover assembly 2, and performing assembly welding connection by adopting argon arc welding to obtain an assembly I;
6b, respectively welding the DN6 pipe connecting mouth 5, the vibration measuring support 6 and the pulsating pressure connecting mouth 12 on the corresponding parts of the first assembly by adopting argon arc welding to obtain a second assembly;
6c, mechanically assembling and connecting the bearing cone 3 and the top of the oxygen top cover component 2 of the assembly II to obtain an assembly III;
6d, penetrating the ignition bent pipe 4 into the assembly III, and mechanically assembling and connecting two ends of the ignition bent pipe with the assembly III to obtain an assembly IV;
and 6e, mechanically assembling and connecting the injector protective cover 7, the oxygen inlet protective cover 8, the bearing cone protective cover 9, the blow-out port protective cover 10 and the ignition port protective cover 11 with corresponding parts on the assembly IV respectively to obtain the injector.
In specific implementation, an oxygen inlet elbow avoidance opening 3-2 for avoiding the oxygen inlet elbow 2-3 and a square hole 3-1 for penetrating through the ignition elbow 4 are formed in the bearing cone 3.
By adopting the embodiment, the preparation period can be greatly shortened, the preparation difficulty is reduced, and the production efficiency and the production quality are improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. A method of making an injector, comprising: the method comprises the following steps:
step 1, assembling and welding an oxygen partition plate nozzle (1-6-1) and a methane partition plate nozzle (1-6-2) into a partition plate nozzle assembly (1-6);
1a, arranging first solder grooves on 12 channel ribs arranged at one end of an oxygen partition nozzle (1-6-1), arranging at least two second solder grooves on the excircle at the other end of the oxygen partition nozzle (1-6-1), and arranging solder in the first solder grooves and the second solder grooves;
1b, sleeving an oxygen partition plate nozzle (1-6-1) into the inner cavity of the methane partition plate nozzle (1-6-2) from one end provided with a second solder groove, extending the end provided with the second solder groove out of the outer side of one end of the methane partition plate nozzle (1-6-2), and enabling one end of the oxygen partition plate nozzle (1-6-1) provided with a channel rib to be flush with the other end of the methane partition plate nozzle (1-6-2);
1c, placing the assembled oxygen baffle nozzle (1-6-1) and methane baffle nozzle (1-6-2) into a vacuum brazing furnace for vacuum brazing to obtain a baffle nozzle assembly (1-6);
step 2, arranging at least two third brazing material tanks on the excircle of one end with the large diameter of the oxygen main nozzle (1-5-1), and assembling the oxygen main nozzle (1-5-1) and the methane main nozzle (1-5-2) into a main nozzle assembly (1-5);
step 3, combining the insole (1-1), the pressure guiding pipe (1-2), the panel (1-3), the compression nut (1-4), the main nozzle assembly (1-5) and the clapboard nozzle assembly (1-6) into an insole assembly (1);
3a, processing the middle sole (1-1), and lathing the upper end face of the middle sole (1-1) with a margin; the method comprises the steps of processing and increasing the aperture of an original inclined hole, used for inserting a pressure guiding pipe (1-2), in a middle sole (1-1), and processing a part sleeve (1-7) by turning according to the increased aperture of the inclined hole, wherein at least two fourth brazing filler metal grooves are formed in the outer circle and the inner wall of the part sleeve (1-7);
3b, processing a panel (1-3), roughly processing the raw materials into a basin-shaped structural member by using a lathe, reserving a finish turning clamping process table at the edge of the basin-shaped structural member, tightly pressing the clamping process table by using a lathe fixing tool, and processing the wall thickness of the basin-shaped structural member to be 3 mm; filling the pelvic cavity of the basin-shaped structural member by adopting a boring milling tool, clamping and fixing, and milling the bored hole of the basin-shaped structural member;
3c, connecting the compression nuts (1-4) to the partition plate nozzle assemblies (1-6) by adopting mechanical assembly; one end of the main nozzle assembly (1-5) and one end of the clapboard nozzle assembly (1-6) are connected and combined with the panel (1-3) by mechanical assembly; filling brazing filler metal in a third brazing filler metal groove at the other end of the main nozzle assembly (1-5) and a second brazing filler metal groove at the other end of the partition plate nozzle assembly (1-6), and connecting one end of the brazing filler metal in the main nozzle assembly (1-5) and the partition plate nozzle assembly (1-6) with the insole (1-1); penetrating a pressure guiding pipe (1-2) into a panel (1-3) from an inclined hole of the midsole (1-1); filling brazing filler metal in a fourth brazing filler metal groove on the part sleeve (1-7), and putting the part sleeve (1-7) into a circular seam between a pressure introduction pipe (1-2) and an inclined hole of the insole (1-1) to obtain an insole assembly (1) frame;
3d, loading the frame of the insole assembly (1) into a furnace by using a furnace loading tool in an over-positioning mode, and brazing in the furnace, positioning and turning the frame of the brazed insole assembly (1) on a clamping process table on a panel (1-3) of the frame by using a lathe tool to obtain the insole assembly (1);
step 4, connecting the pipe connecting nozzle (2-1), the pulsation pressure measuring nozzle (2-2) and the oxygen inlet bent pipe (2-3) with the corresponding part of the liquid oxygen top cover (2-4) by argon arc welding to obtain an oxygen top cover assembly (2); turning the end face of the oxygen top cover component (2) which is butted with the upper end face of the middle sole (1-1) by adopting a lathe;
step 5, machining the ignition bent pipe (4), namely dividing the ignition bent pipe (4) into a first bent pipe flange (4-1), an ignition bent pipe pipeline (4-2) and a second bent pipe flange (4-3) to be machined respectively;
5a, cutting a square raw material into a first elbow pipe flange blank, turning one end of the first elbow pipe flange blank into a cylinder by adopting turning, and processing a through hole in the radial center of the first elbow pipe flange blank by adopting turning to obtain a first elbow pipe flange (4-1);
5b, cutting the square raw material into a second elbow flange blank, turning one end of the second elbow flange blank into a cylinder by adopting turning, and processing a through hole at the radial center of the second elbow flange blank by adopting turning to obtain a second elbow flange (4-3);
5c, cutting the bar stock into an ignition pipeline blank, machining a through hole in the radial center of the ignition pipeline blank by adopting turning, and bending the ignition pipeline blank to obtain an ignition bent pipe pipeline (4-2);
5d, respectively connecting the turned end of the first bent pipe flange (4-1) and the turned end of the second bent pipe flange (4-3) with the two ends of the ignition bent pipe pipeline (4-2) in a positioning mode through a tool, and welding through argon arc welding to obtain the ignition bent pipe (4);
step 6, combining the insole assembly (1), the oxygen top cover assembly (2), the bearing cone (3), the ignition bent pipe (4), the DN6 connecting nozzle (5), the vibration measuring support (6), the pulsating pressure connecting nozzle (12), the injector protective cover (7), the oxygen inlet protective cover (8), the bearing cone protective cover (9), the air outlet protective cover (10) and the ignition port protective cover (11) into an injector;
6a, contacting the upper end face of the insole (1-1) of the insole assembly (1) with the turning surface of the oxygen top cover assembly (2), and performing assembly welding connection by adopting argon arc welding to obtain an assembly I;
6b, respectively welding the DN6 pipe connecting nozzle (5), the vibration measuring support (6) and the pulsating pressure connecting nozzle (12) on the corresponding parts of the first assembly by adopting argon arc welding to obtain a second assembly;
6c, mechanically assembling and connecting the bearing cone (3) and the top of the oxygen top cover component (2) of the assembly II to obtain an assembly III;
6d, penetrating the ignition bent pipe (4) into the assembly III, and mechanically assembling and connecting two ends of the ignition bent pipe with the assembly III to obtain an assembly IV;
and 6e, mechanically assembling and connecting the injector protective cover (7), the oxygen inlet protective cover (8), the bearing cone protective cover (9), the blow-out port protective cover (10) and the ignition port protective cover (11) with the parts, corresponding to the parts, on the assembly IV respectively to obtain the injector.
2. A method of making an injector as claimed in claim 1, wherein: in the step 1, the vacuum brazing comprises vacuumizing, heating, brazing and cooling, wherein the vacuumizing is cold vacuumizing, so that the vacuum degree in a furnace reaches 5 multiplied by 10-2PerPa, working vacuum degree of 8X 10-2Pa; heating to 450 deg.C at a rate of 240 deg.C/h, and maintaining for 20 min; heating to 950 deg.C at 300 deg.C/h, and maintaining for 90 min; heating to 1025 ℃ at the speed of 360 ℃/h to start brazing; brazing, namely brazing at 1025 +/-5 ℃ for 15 min; cooling, filling high-purity gas into the furnace after the furnace is cooled to 600 ℃ along with the furnace to ensure that the pressure in the furnace reaches 8 multiplied by 104After the pressure is/Pa, starting a fan to cool to 65 ℃ and discharging.
3. A method of making an injector as claimed in claim 1, wherein: in the step 1, the depth of the first brazing filler metal groove is 0.8mm, and the width of the first brazing filler metal groove is 0.6 mm; the depth of the second brazing filler metal groove is 0.5mm, and the width of the second brazing filler metal groove is 1 mm.
4. A method of making an injector as claimed in claim 1, wherein: in the step 2, the depth of the third solder pot is 0.5mm, and the width is 1 mm.
5. A method of making an injector as claimed in claim 1, wherein: in the step 3, the diameter of the outer circle of the part sleeve (1-7) is smaller than the diameter of the enlarged inclined hole, and the diameter of the inner circle of the part sleeve (1-7) is larger than the diameter of the outer circle of the pressure guiding pipe (1-2).
6. A method of making an injector as claimed in claim 1, wherein: in the step 3, the thickness of the upper end face of the middle sole (1-1) with the allowance is 1 mm.
7. A method of making an injector as claimed in claim 1, wherein: in the step 4, the turning size of the end face of the oxygen top cover assembly (2) in butt joint with the upper end face of the middle sole (1-1) is 1 mm.
8. A method of making an injector as claimed in claim 1, wherein: in the step 5, the length of the cut first elbow pipe flange blank is 48mm, the length of the cut second elbow pipe flange blank is 74mm, and the length of the cut ignition pipeline blank is 105.3 mm; the diameter of the turned cylinder is 20mm, the aperture of the turned through hole is 12mm, and the diameter of the bar stock is 20 mm; the bending angle of the ignition pipeline blank is 70 degrees.
9. A method of preparing an injector as claimed in claim 1, wherein: in the step 6, an oxygen inlet elbow avoidance opening (3-2) for avoiding the oxygen inlet elbow (2-3) and a square hole (3-1) for penetrating through the ignition elbow (4) are formed in the bearing cone (3).
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| CN115435338B (en) * | 2022-11-09 | 2023-01-03 | 中国空气动力研究与发展中心超高速空气动力研究所 | Large-flow combustion heating injector adopting mixing nozzle |
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