CN110985235B - Continuous casting system and process for solid rocket engine shell - Google Patents
Continuous casting system and process for solid rocket engine shell Download PDFInfo
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- CN110985235B CN110985235B CN201911259185.7A CN201911259185A CN110985235B CN 110985235 B CN110985235 B CN 110985235B CN 201911259185 A CN201911259185 A CN 201911259185A CN 110985235 B CN110985235 B CN 110985235B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/24—Charging rocket engines with solid propellants; Methods or apparatus specially adapted for working solid propellant charges
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a continuous casting system and a continuous casting process for a solid rocket engine shell, which comprise a track for conveying a movable casting cylinder, wherein the middle section of the track is provided with a casting station, the casting station is sequentially provided with a base, a lifting bracket, the movable casting cylinder, a casting cylinder cover and casting blanking equipment from bottom to top, the casting cylinder cover is fixed at the top of the lifting bracket, the movable casting cylinder is positioned at the inner side of the lifting bracket and below the casting cylinder cover, and the movable casting cylinder is butted with the casting cylinder cover through the lifting of the lifting bracket; the pouring and blanking equipment comprises a mixing pot, a discharge valve is arranged at the bottom of the mixing pot and connected to a hopper through a pipeline, a plurality of pouring ports are formed in a pouring cylinder cover, and a discharge port of the hopper is connected to the pouring ports. By adopting the system, the continuous casting of the rocket engine shell can be realized, the automation degree is high, and the batch production can be realized.
Description
Technical Field
The invention belongs to the technical field of solid rocket engine production, and particularly relates to a continuous casting system and a continuous casting process for a solid rocket engine shell.
Background
The engine shell slurry pouring process is a very important process in the production process of the solid rocket engine, and the qualified mixed slurry is poured into the engine shell in a vacuum pouring mode and is solidified to prepare a product meeting the design requirements. In the existing pouring, a motor shell is firstly installed and fixed in a vacuum container, namely a pouring pot, of which the outer wall is provided with a hot water heating jacket, and mixed slurry in a hopper flows into the shell through a conveying pipe under the condition that the inside of the container is completely in a vacuum environment. In order to completely remove the gas carried in the slurry in the vacuum environment, the slurry is dispersed into fine drop-shaped fluid through a flower plate before entering the shell of the engine, so that the gas carried can be quickly and efficiently removed by enlarging the surface area of the slurry, and the aim of meeting the requirement of the pouring process is fulfilled. The prior art engine case slurry casting system is shown in fig. 1.
The pouring tank mainly comprises a pouring cylinder and a pouring cylinder cover which form a closed vacuum container and is fixed through foundation bolts. Before and after pouring, the engine shell, the hopper, the material conveying pipe and the pattern plate need to be installed and dismantled, and the auxiliary time occupied by the pouring station is longer. And the mixed slurry is transferred to the hopper, the slurry in the mixing pot is guided into the hopper by a set of overturning and material transferring devices, and then the hopper is transferred and installed on a conveying pipe of the pouring, so that the pouring efficiency is directly influenced by the time of exposing the slurry in the air environment. In addition, the flow control of the slurry in the pouring process is often realized by manually observing through a glass sight glass on a pouring cylinder cover to adjust the opening size of a valve on a material conveying part, and the degassing effect of the slurry is not easy to guarantee.
Disclosure of Invention
The invention provides a continuous casting system and a continuous casting process for a solid rocket engine shell, which can realize continuous casting, have high automation degree and can realize continuous batch production of casting.
The invention provides a continuous casting system for a solid rocket engine shell, which comprises a track for conveying a movable casting cylinder, wherein a casting station is arranged at the middle section of the track, and the casting station is sequentially provided with a base, a lifting bracket, the movable casting cylinder, a casting cylinder cover and casting blanking equipment from bottom to top; the pouring and blanking equipment comprises a mixing pot, a discharge valve is arranged at the bottom of the mixing pot and connected to a hopper through a pipeline, a plurality of pouring ports are formed in a pouring cylinder cover, and a discharge port of the hopper is connected to the pouring ports.
Furthermore, the system is provided with a pouring pit, wherein the mixing pot is positioned on the ground surface, and the track, the base, the lifting support, the pouring cylinder cover and the rest pouring and blanking equipment are positioned in the pit; and the connecting elevators at the two ends of the track are connected to the ground surface through the elevators.
Furthermore, the hopper is connected with a pouring gate of the pouring cylinder cover through a pipeline, a volume constant delivery pump and a rubber tube valve are installed on the pipeline, the volume constant delivery pump is further connected with an explosion-proof servo motor, and a pattern plate is further arranged at the pouring gate.
Furthermore, a vacuum pipeline is further arranged on the pouring cylinder cover, an explosion-proof camera is further installed on the side wall of the pouring cylinder cover, and the explosion-proof camera is right opposite to the lower portion of the pattern plate.
Furthermore, the bottom of the movable casting cylinder is provided with a wheel and a frame, a cylinder body is fixed on the frame, a rotary supporting disc is arranged in the cylinder body, an engine shell mounting disc and a positioning seat are arranged on the rotary supporting disc, the lower portion of the rotary supporting disc is connected with a rotary shaft assembly, an input shaft of the rotary shaft assembly is provided with a spline coupling, and the input shaft is a fixed coupling.
Furthermore, the base is also provided with an explosion-proof motor which is connected with a speed reducer, an output shaft of the speed reducer is provided with a spline coupler, the end of the spline coupler is a movable coupler, and the rotation is realized by butting the output shaft of the speed reducer with a rotating shaft assembly.
Furthermore, a pull rod type oil cylinder is arranged on the lifting support, and the lifting of the movable pouring cylinder is driven by the oil cylinder.
The invention also relates to a process for continuous casting of a solid rocket engine casing by using the system, which comprises the following steps:
1) Preparing a movable casting cylinder, installing a plurality of engine shells to be cast into the movable casting cylinder, and then pre-drying the whole movable casting cylinder;
2) Moving the movable casting cylinder to a casting station through a rail, lifting the movable casting cylinder through a lifting support to be in butt joint with a casting cylinder cover, enabling a casting port to be over against an engine to be cast, feeding the prepared casting slurry raw material into the casting port through casting blanking equipment, casting the shell of the engine, and then casting all the shells in the movable casting cylinder through rotation;
3) After the pouring is finished, the movable pouring cylinder lifting support descends through the lifting support and is matched with the rail, and the movable pouring cylinder lifting support is moved out through the rail to be processed in other procedures.
Further, the diameter of the engine shell is less than or equal to 300mm.
Furthermore, the casting working temperature is 50-55 ℃, and the pressure is 1.066Kpa.
The invention has the following beneficial effects:
1. through converting fixed casting cylinder into the removal casting cylinder through rail transport, the casing installation that needs artifical participation around making the pouring prepares the process step and shifts to the preceding preparation station of the pouring of real meaning, no longer occupies the pouring station to ensure the maximize of pouring station availability factor. Different stations can be set according to the steps of installation, pre-baking, pouring and curing of the shell, so that continuous production can be realized.
2. Pouring unloading equipment adopts mixing pot bottom ejection of compact mode directly with mixing pot medicine thick liquid leading-in hopper in, furthest avoids the contact of medicine thick liquid and air to can make full use of the idle spatial position of pouring station, reduced the area in worker's room, eliminated the operation station who occupies more artificial mixing pot upset guide.
3. Through set up the gyration dish in removing the casting cylinder, install a plurality of engine casings, can once only accomplish the whole engine casings pouring of maximum mixed dose, greatly improve work efficiency. In order to ensure that an input shaft of a rotary disk in the movable casting cylinder is smoothly butted with an output shaft of a speed reducer driven by an explosion-proof motor arranged on a base, and the power transmission of rotation is completed, spline couplings are arranged at two shafts, wherein a fixed coupling is arranged at the input shaft of the casting cylinder, and a movable coupling is arranged at the output shaft of the speed reducer. When the casting cylinder is in a lifting state, the movable coupler axially moves along the output shaft of the reducer to complete the butt joint and the separation of the output shaft of the casting cylinder and meet the power driving requirement of the explosion-proof motor on the rotary table.
4. The invention can improve the automation capacity of the operation process, improve the safety essence degree of equipment in dangerous operation places of the fire chemical industry, reduce the labor intensity of field operation personnel and improve the working efficiency. Meanwhile, on the premise of not changing the existing engine shell slurry vacuum pouring mode, the adopted new system equipment can continue to inherit and continue the original technology and experience accumulation so as to ensure the stability and improvement of the propellant charging production process.
Drawings
FIG. 1 is a schematic diagram of a prior art solid rocket engine casting tank casting configuration.
Fig. 2 is a schematic diagram of the operation of the system of the present invention.
FIG. 3 is a front view of the pouring station of the present invention.
FIG. 4 is a side view of the casting station of the present invention.
FIG. 5 is a top view of the casting station of the present invention.
Figure 6 is a front view of the lift bracket of the present invention.
Figure 7 is a side view of the lift bracket of the present invention.
Figure 8 is a top view of the lift bracket of the present invention.
FIG. 9 is a front view of the moving casting cylinder of the present invention.
FIG. 10 is a side view of the moving casting cylinder of the present invention.
FIG. 11 is a top view of the moving casting cylinder of the present invention.
Detailed Description
The invention will be further elucidated with reference to the following examples.
Examples
As shown in fig. 2-11, the continuous casting system for the solid rocket engine shell comprises a track 2 for conveying a movable casting cylinder 1, wherein a casting station is arranged in the middle section of the track, the casting station is sequentially provided with a base 3, a lifting bracket 4, the movable casting cylinder 1, a casting cylinder cover 5 and casting blanking equipment from bottom to top, the casting cylinder cover 5 is fixed at the top of the lifting bracket, the movable casting cylinder is positioned on the inner side of the lifting bracket 4 and below the casting cylinder cover 5, and the movable casting cylinder is butted with the casting cylinder cover by the lifting of the lifting bracket; pouring unloading equipment is equipped with the bleeder valve including mixing pot 6, its bottom, and the bleeder valve passes through pipe connection to hopper 7, is equipped with a plurality of sprue gates on the pouring cylinder lid, and 7 discharge gates of hopper are connected to sprue gate 10.
In the preferred scheme, the system is provided with a pouring pit, wherein the mixing pot 6 is positioned on the ground surface, and the track 2, the base 3, the lifting support 4, the pouring cylinder cover 5 and the rest pouring blanking equipment are positioned in the pit; the connecting elevators at the two ends of the track 2 are connected to the ground surface through the elevators. The station space is fully utilized.
In the preferred scheme, the hopper is connected with a pouring gate of a pouring cylinder cover through a pipeline, a volume constant delivery pump 8 and a rubber tube valve are installed on the pipeline, the volume constant delivery pump is further connected with an explosion-proof servo motor 9, and a pattern plate is further arranged at the pouring gate.
In the preferred scheme, a vacuum pipeline 13 is further arranged on the casting cylinder cover 5, an explosion-proof camera 11 is further mounted on the side wall of the casting cylinder cover, and the explosion-proof camera is right opposite to the lower portion of the pattern plate. The explosion-proof camera carries out the timing recognition of shooing to the tiny dribbling fluid density behind the medicine thick liquid through the flower disc, and the big density of density when make full use of medicine thick liquid unloading speed is fast, this characteristic that the density is little when unloading speed is slow, compares, the analysis, the judgement through the image screenshot of taking a candid photograph and the standard screenshot of the medicine thick liquid unloading speed density of technological requirement, can also control volume constant delivery pump drive with explosion-proof servo motor through remote control system, reduces or increases medicine thick liquid unloading speed, reaches the automatic control requirement to medicine thick liquid flow. And a photoelectric switch can be further arranged on the pouring cylinder cover and used for controlling the photoelectric switch and the explosion-proof motor to be linked to complete the position control of the rotating angle of the rotary disc in the pouring cylinder. The pouring position of the engine shell for three times can be accurately positioned. In this embodiment, 24 engine housings can be placed in the movable casting cylinder, 8 casting ports are formed in the casting cylinder cover, slurry casting needs to be completed in 3 times, and in order to ensure that the rotary table can complete accurate positioning of 60 degrees of rotation each time, the photoelectric sensor control element can adopt a transmitting unit of a photoelectric sensor arranged on the outer side of a glass window at the top of the casting cylinder cover and a light receiving unit arranged on the top surface of the base to form a complete optical signal receiving and transmitting sensor device (for example, a light projector selects E3Z-T66A-L, and a light receiver selects E3Z-T66A-D), and on-off control of signals is performed by utilizing a rotary positioning through hole arranged on the rotary table, so that starting and stopping operations of the explosion-proof motor are completed.
In the preferred scheme, the bottom of the movable casting cylinder 1 is provided with a wheel 1-1 and a frame 1-2, the frame is fixedly provided with a cylinder body 1-3, the cylinder body is internally provided with a rotary supporting disc 1-4, the rotary supporting disc is provided with an engine shell mounting disc 1-5 and a positioning seat 1-6, the lower part of the rotary supporting disc is connected with a rotary shaft assembly 1-7, an input shaft of the rotary shaft assembly is provided with a spline coupling, and the input shaft is provided with a fixed coupling. The movable casting cylinder is also provided with a hot water pipe 18, and the interface of the hot water pipe is in butt joint with a hot water system through a pipeline water taking device when the movable casting cylinder and the casting cylinder cover are installed and positioned. The process of moving the casting cylinder to enter and exit the casting station can realize full automation without manual operation and intervention on site, and all operation actions and process parameters such as temperature, pressure, flow and the like transmit site control signals and data to a remote control console through various sensors and control switches. Interfaces of a power source, an execution unit, a control unit and the like are all concentrated to the positions of a base, a lifting support, a pouring cylinder cover and the like which are fixedly installed, and field operation is not needed.
In the preferred scheme, the base 3 is further provided with an explosion-proof motor 12 which is connected with a speed reducer, an output shaft of the speed reducer is provided with a spline coupling assembly 16, the end of the spline coupling assembly is a movable coupling, and the rotation is realized by butt joint of the output shaft of the speed reducer and a revolving shaft assembly. In the preferred scheme, a pull rod type oil cylinder 14 is arranged on the lifting support 4, the oil cylinder drives the movable pouring cylinder to lift, and the oil cylinder drives the beam bracket and the pull rod 15 to ascend and descend. The lower part of the lifting support is also provided with a positioning component 17, specifically a movable steel ball collision bead component which is correspondingly arranged between four V-shaped positioning grooves arranged at two sides of the frame and the lifting support, and after the pouring cylinder enters the lifting support, coarse positioning is completed through the cooperation of the positioning components. The movable casting cylinder and the casting cylinder cover are both provided with side lugs, the lifting support is provided with a beam bracket 19, and when the oil cylinder drives the casting cylinder to ascend, 4 positioning pins on the beam bracket of the lifting support are matched with positioning holes corresponding to the support lugs on the two sides of the casting cylinder to finish the fine positioning of the lifting support and the casting cylinder; the oil cylinder drives the pouring cylinder on the beam bracket to be in end face fit sealing with the pouring cylinder cover, and 4 positioning pins at the side lug of the pouring cylinder cover are positioned with the positioning holes corresponding to the support lugs of the pouring cylinder cover, so that the accurate positioning of the pouring cylinder and the pouring cylinder cover is completed. The positioning of the pouring gate and the shell position is ensured through the purpose of three-time positioning and matching, and the accurate matching and connection of the coupling between the flowers are also ensured. In addition, the oil cylinder rises and simultaneously drives the movable spline coupler on the pull rod assembly outside the lifting support beam bracket to rise to complete the matching operation with the fixed spline coupler.
The process for carrying out continuous casting on the solid rocket engine shell by adopting the system comprises the following steps:
1) Preparing a movable casting cylinder, installing a plurality of engine shells to be cast into the movable casting cylinder, and then pre-drying the whole movable casting cylinder;
2) Moving the movable casting cylinder to a casting station through a rail, lifting the movable casting cylinder through a lifting support to be in butt joint with a casting cylinder cover, enabling a casting port to be opposite to an engine to be cast, enabling the prepared casting slurry raw material to enter the casting port through casting blanking equipment, casting a shell of the engine, and then casting all shells in the movable casting cylinder through rotation;
3) After the pouring is finished, the movable pouring cylinder lifting support descends through the lifting support and is matched with the rail, and the movable pouring cylinder lifting support is moved out through the rail to be processed in other procedures.
The diameter of the engine shell is less than or equal to 300mm.
The concrete pouring parameters are described by taking the engine shell specification as the front 140 × XXmm as an example. Each dose is 10.5kg; the density of the slurry is 1.78 g/cm; the pouring working pressure is 1.066KPa; the casting working temperature is 50-55 ℃; 24 engine housings can be placed in a movable casting cylinder at the same time, and the number of casting openings is 8. Pouring is simultaneously carried out in a pouring step by one step for every 8 engine shells, and pouring of 24 engine shells is completed in three steps; the pouring time of each pouring step is that the material is sucked for 7min and discharged for 8min according to the volumetric metering pump, and the total time is 15min. Pouring time of the 24 engine shells is about 45min; the specification of the volumetric metering pump is 6L, and the number of the volumetric metering pumps is 8; the pouring speed (flow rate) of the slurry is 0.74L/min; two mixing pots are arranged simultaneously so as to realize continuous casting, the mixing pot adopts a discharging mode of bottom discharging, and the number of the discharging holes is 2; the number of the material receiving hoppers is also set to be 2; the blanking valve adopts manual and pneumatic rubber tube valves, each pouring gate is provided with 1 manual valve and 2 pneumatic valves, the total number of the rubber tube valves is 24, and the pneumatic valve is in a long-open state; the inner size of the casting cylinder is 2000 multiplied by 880mm in the longer side, and the number of the casting cylinders is 3; when the engine shell in the casting cylinder is fixedly installed, the rotating disc rotates at the speed of 1.24r/min, the rotating angle is 60 degrees each time, and the time consumed for completing the rotation is 8s; the rotating angle control mode of the rotating disc is photoelectric switches, and 2 groups of the rotating disc are provided; the drift diameter of the oil cylinder for lifting the casting cylinder is 160mm in the center, the stroke is 410mm, the maximum working pressure is 7MPa, and the number is 2.
The quality of the cast slurry of the engine shell obtained after casting meets the process requirements through various performances of a square billet test, and the test data of a ground static ignition test meets the design index requirements.
Claims (7)
1. The continuous casting system of the solid rocket engine shell is characterized by comprising a track (2) for conveying a movable casting cylinder (1), wherein a casting station is arranged in the middle section of the track, a base (3), a lifting support (4), the movable casting cylinder (1), a casting cylinder cover (5) and casting blanking equipment are sequentially arranged on the casting station from bottom to top, the casting cylinder cover (5) is fixed at the top of the lifting support, the movable casting cylinder is positioned on the inner side of the lifting support (4) and below the casting cylinder cover (5), and the movable casting cylinder is butted with the casting cylinder cover through the lifting of the lifting support; the pouring and blanking equipment comprises a mixing pot (6), the bottom of the mixing pot is provided with a discharge valve, the discharge valve is connected to a hopper (7) through a pipeline, a plurality of pouring ports are arranged on a pouring cylinder cover, and discharge ports of the hopper (7) are connected to the pouring ports; the system is provided with a pouring pit, wherein a mixing pot (6) is positioned on the ground surface, and a track (2), a base (3), a lifting support (4), a pouring cylinder cover (5) and other pouring and blanking equipment are positioned in the pit; the connecting lifters at the two ends of the track (2) are connected to the ground surface through the lifters;
the bottom of the movable casting cylinder (1) is provided with a wheel (1-1) and a frame (1-2), the frame is fixed with a cylinder body (1-3), the cylinder body is internally provided with a rotary supporting disc (1-4), the rotary supporting disc is provided with an engine shell mounting disc (1-5) and a positioning seat (1-6), the lower part of the rotary supporting disc is connected with a rotary shaft assembly (1-7), an input shaft of the rotary shaft assembly is provided with a spline coupling, and the input shaft is a fixed coupling;
the process steps when the system is adopted for specific construction are as follows:
1) Preparing a movable casting cylinder, installing a plurality of engine shells to be cast into the movable casting cylinder, and then pre-drying the whole movable casting cylinder;
2) Moving the movable casting cylinder to a casting station through a rail, lifting the movable casting cylinder through a lifting support to be in butt joint with a casting cylinder cover, enabling a casting port to be opposite to an engine to be cast, enabling the prepared casting slurry raw material to enter the casting port through casting blanking equipment, casting a shell of the engine, and then casting all shells in the movable casting cylinder through rotation;
3) After the pouring is finished, the movable pouring cylinder lifting support descends through the lifting support and is matched with the rail, and the movable pouring cylinder lifting support is moved out through the rail to be processed in other procedures.
2. The system of claim 1, wherein: the hopper is connected with a pouring gate of the pouring cylinder cover through a pipeline, a volume constant delivery pump (8) and a rubber tube valve are installed on the pipeline, the volume constant delivery pump is further connected with an explosion-proof servo motor (9), and a pattern plate is further arranged at the pouring gate.
3. The system of claim 2, wherein: still be equipped with the vacuum line on pouring cylinder cap (5), still install explosion-proof camera (11) on the pouring cylinder cap lateral wall, explosion-proof camera is just to the card below.
4. The system of claim 1, wherein: the base (3) is also provided with an explosion-proof motor (12) which is connected with a speed reducer, an output shaft of the speed reducer is provided with a spline coupler, and the end of the spline coupler is a movable coupler and is connected with an input shaft of a revolving shaft assembly in a butt joint mode to realize rotation.
5. The system of claim 1, wherein: and a pull rod type oil cylinder is arranged on the lifting support (4), and the lifting of the movable pouring cylinder is driven by the oil cylinder.
6. The system of claim 1, wherein: the diameter of the engine shell is less than or equal to 300mm.
7. The system of claim 1, wherein: the casting temperature is 50-55 ℃ and the pressure is 1.066Kpa.
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| CN201911259185.7A CN110985235B (en) | 2019-12-10 | 2019-12-10 | Continuous casting system and process for solid rocket engine shell |
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| CN201911259185.7A CN110985235B (en) | 2019-12-10 | 2019-12-10 | Continuous casting system and process for solid rocket engine shell |
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| CN110985235B true CN110985235B (en) | 2023-02-24 |
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| CN112253331B (en) * | 2020-09-10 | 2023-05-16 | 湖北文理学院 | Full-automatic solid fuel pouring equipment and pouring curing method thereof |
| CN112196693B (en) * | 2020-09-10 | 2023-02-17 | 湖北文理学院 | Pouring cylinder assembly for pouring solid fuel |
| CN113204206B (en) * | 2021-04-25 | 2022-07-29 | 北京航天动力研究所 | PLC-based multi-test-bed extrusion type medium supply control system and method |
| CN113944569B (en) * | 2021-09-23 | 2022-10-25 | 西安近代化学研究所 | Vacuum metering casting device |
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