CN111216926B - Cold air propulsion system - Google Patents
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- CN111216926B CN111216926B CN201911201010.0A CN201911201010A CN111216926B CN 111216926 B CN111216926 B CN 111216926B CN 201911201010 A CN201911201010 A CN 201911201010A CN 111216926 B CN111216926 B CN 111216926B
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004880 explosion Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
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- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/40—Arrangements or adaptations of propulsion systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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Abstract
The invention relates to a cold air propulsion system, belonging to the technical field of propulsion systems, and the technical scheme is that the cold air propulsion system comprises an air bottle group formed by at least one air bottle, wherein the air bottle group is communicated with a combination valve, an inflation one-way valve for one-way inflation, a command type pressure reducer and a main pressure reducer for overpressure safety protection, a main electromagnetic valve for electronic control deflation of the air bottle and a command type electromagnetic valve are integrated in the combination valve, and the outlet of the combination valve is communicated with a thruster unit formed by at least one thruster, so that the effects of simplifying the structure of the existing cold air propulsion system and reducing the occupied space are achieved.
Description
Technical Field
The invention relates to the technical field of propulsion systems, in particular to a cold air propulsion system.
Background
Spacecraft propulsion systems include chilled air propulsion systems, solid propulsion systems, liquid propulsion systems (mono-component, bi-mode, hybrid), electric propulsion systems, and the like. The cold air propulsion system adopts high-pressure gas to directly expand and accelerate to spray through a spray pipe to generate thrust. The thruster converts pressure energy into flow kinetic energy to be ejected without any chemical reaction. The cold air propulsion generally selects inert gas nitrogen or helium as a working medium, and has the main characteristics of no chemical reaction such as combustion, simple system, low cost, high reliability, no heat of the inert working medium, no explosion hazard, no pollution and the like. In the attitude and orbit control propulsion or separation process of the spacecraft, a cold air propulsion system is often used for controlling the state of the aircraft or realizing the structure separation.
The existing cold air propulsion system generally adjusts the pressure of an air storage source into the required constant air source pressure through a pressure reducing valve, then controls the air through one or more electromagnetic valves, and sprays cold air through a pipeline to generate thrust or power so as to realize the action or separation of products and the like.
The existing cold air propulsion system generally needs to connect a plurality of valves such as a stop valve, a pressure reducer, a filter, a one-way valve and an electromagnetic valve in a mode of connecting a plurality of pipelines and joints, the working process is complex, serial continuous actions of a plurality of sections of pipelines and a plurality of valves are involved, faults of any part can cause system failure, and meanwhile, the system layout has strict requirements on space and needs installation of larger space test products and layout of pipelines.
Disclosure of Invention
The invention aims to provide a cool air propulsion system which simplifies the structure of the existing cool air propulsion system and reduces the occupied space.
The technical purpose of the invention is realized by the following technical scheme:
a cold air propulsion system comprises a gas cylinder group formed by at least one gas cylinder, wherein the gas cylinder group is communicated with a combination valve, an inflation one-way valve for one-way inflation, a command type pressure reducer and a main pressure reducer which are used for outputting high-pressure reduction of the gas cylinder and have an overpressure safety protection function, a main electromagnetic valve and a command type electromagnetic valve for carrying out electric control deflation on the gas cylinder are integrated in the combination valve, and an outlet of the combination valve is communicated with a thruster unit formed by at least one thruster.
Through the technical scheme, gas cylinder group provides high-pressure inert gas, in order to provide power as the power supply, gas cylinder group passes through pipeline and combination valve intercommunication, the combination valve has the stop valve simultaneously, the check valve, the function of pressure reducer and solenoid valve, realize gaseous aerifing, decompression and on-off control, during operation through pipeline and thruster unit connection produce required thrust, owing to set up the combination valve, the combination valve is multifunctional valve, consequently, need not adopt the pipeline of a plurality of valves + the connected mode who connects, air conditioning propulsion system structure has been simplified greatly, and the space that occupies has been reduced.
The invention is further configured to: and a multi-channel pipeline is communicated between the combined valve and the thruster unit, and the multi-channel pipeline is selected from a straight-through pipeline, a three-way pipeline or a four-way pipeline according to the number of thrusters in the thruster unit.
Through the technical scheme, when the thruster unit adopts one thruster, the thruster unit is directly connected with a straight way, when the thruster unit adopts two thrusters, the thruster unit is connected with a tee joint, when the thruster unit adopts three thrusters, the four way joint is used for connecting, and the like, the matching with the quantity of thrusters with different quantities is carried out through a multi-channel pipeline, the synchronous control of a plurality of thrusters can be realized according to actual needs, and the internal pipeline connecting structure of the air conditioning propulsion system is further simplified.
The invention is further configured to: and an asynchronous electromagnetic valve is communicated between the multi-channel pipeline and the thruster unit.
Through the technical scheme, the electromagnetic valve is connected between the multi-channel pipeline and the thruster unit, and the asynchronous working state control of each thruster in the thruster unit can be realized, so that the thrust control in different directions and dimensions is realized.
The invention is further configured to: the combined valve comprises a main shell, one end of the main shell is provided with an inlet cavity communicated with the gas cylinder, and a manual switch, a command type pressure reducer, a command type electromagnetic valve, a main pressure reducer and a main electromagnetic valve are integrated in the main shell; the commanding pressure reducer comprises a commanding pressure reducer shell, the interior of the commanding pressure reducer shell is communicated with an inlet cavity, a commanding pressure reducer adjusting disc and a commanding pressure reducer piston are arranged in the commanding pressure reducer shell in a sliding manner, a pressure column in threaded fit with the inner wall of the commanding pressure reducer shell is arranged above the commanding adjusting disc in an abutting manner, the commanding pressure reducer piston is positioned below the commanding pressure reducer adjusting disc, a commanding pressure reducer spring is fixedly connected between the commanding pressure reducer piston and the commanding pressure reducer adjusting disc, a commanding pressure reducer overpressure release channel is arranged on the commanding pressure reducer piston, a commanding pressure reducer outlet cavity is arranged in the commanding pressure reducer shell below the commanding pressure reducer piston, the commanding pressure reducer outlet cavity is communicated with the commanding pressure reducer overpressure release channel through an air passage, a commanding pressure reducer inlet cavity communicated with the inlet cavity is arranged, a commanding pressure reducer valve core spring is fixedly connected between the commanding pressure reducer valve core and the inner bottom surface of the commanding pressure reducer inlet cavity, and a commanding pressure reducer safety valve core for plugging a commanding pressure reducer overpressure release channel is arranged between a commanding pressure reducer piston and the commanding pressure reducer valve core; the main pressure reducer comprises a main pressure reducer piston which is arranged in the outlet cavity of the commanding pressure reducer in a sliding mode, a main pressure reducer overpressure release passage used for pressure relief is formed in the main pressure reducer piston, a main pressure reducer outlet cavity communicated with the outlet cavity of the commanding pressure reducer is formed in the lower portion of the main pressure reducer piston, a main pressure reducer valve core is arranged in the main pressure reducer outlet cavity, and the main pressure reducer overpressure release passage is plugged at the top end of the main pressure reducer valve core.
Through above-mentioned technical scheme, the valve during operation, at first, use the frock rotatory to the open mode with hand switch's case, the pressure of entrance chamber and the pressure of commander's pressure reducer entrance chamber all equal this moment, rotatory compression leg, the pressure leg pushes down commander's pressure reducer adjustment disk, compress commander's pressure reducer loading spring, drive commander's pressure reducer piston downstream, commander's pressure reducer safety case will command the pressure reducer case and open, gaseous by commanding the entrance chamber through the gas passage around the case get into commander's pressure reducer export chamber, along with slowly building up of pressure, the effort that is used in commander's pressure reducer piston slowly increases, promote pressure reducer piston upward movement, commander's pressure reducer case upwards moves under the effect of commander's pressure reducer case spring until closing, the atress of commander. It can be assumed that the pressure of the outlet chamber of the pressure reducer is commanded to be P2, the pressure of the outlet chamber of the main pressure reducer is P3, and the acting areas of the gas pressures P2 and P3 on the upper end and the lower end of the main pressure reducer valve core are the same, so that the pressure value of the outlet pressure measuring point of the pressure reducer is P2-P3 in a balanced state of the main pressure reducer valve core, namely the pressure value represents the pressure reducing pressure, and the gas cylinder pressure P1 can be reduced to the target pressure P3 according to the indication of the pressure measuring point during operation. When the pressure P1 of the air bottle is obviously reduced along with the deflation of the air bottle, the outlet cavity of the pressure reducer is always in a closed state under the command, so that the P2 is always kept unchanged, and the P2 is always equal to the P3 under the balanced state of the valve core of the main pressure reducer, so that the P3 is also basically kept unchanged, the influence of the change of the upstream pressure P1 on the P2 is isolated through the command of the pressure reducer, the stable precision of the outlet pressure P3 of the pressure reducer is greatly improved, and the propelling force of the cold air propelling system is stable and reliable. If the abnormal conditions such as the leakage appear in the commander pressure reducer case of combination valve, lead to P2 constantly to rise, when P2 is higher than a definite value, commander pressure reducer piston upward movement to breaking away from the contact with commander pressure reducer safety case, commander pressure reducer superpressure release passageway opens this moment, gas is released to the external world, the superpressure protection of commander pressure reducer has been realized, if the abnormal conditions appears in the low reaches that the combination valve gave up, lead to P3 constantly to rise, when P3 is higher than P2 a definite value, main pressure reducer piston upward movement is to breaking away from the contact with main pressure reducer case, main pressure reducer superpressure release passageway is opened this moment, P3 pressure releases the external world through the inside cavity of main pressure reducer case, gas is released to the external world, the superpressure. Thus, the present stress-reducer module can achieve a "double safety protection" of the command stress-reducer and the main stress-reducer. If the pressure reducing module of the combination valve is completely failed or other emergency situations occur, a tool can be used for rotating the valve core of the manual switch to a closed state, and final safety protection is achieved at the moment. In conclusion, by arranging the main pressure reducer and the command type pressure reducer, the use safety of the combination valve is greatly improved, and the use safety of the cold air propulsion system is further improved.
The invention is further configured to: the top of main pressure reducer case is the button head form, and the position department of main pressure reducer piston and main pressure reducer case butt is fixed and is provided with main pressure reducer relief valve sealing pad.
Through above-mentioned technical scheme, the top of main pressure reducer valve body is the button head and with main pressure reducer piston butt, fixes on main pressure reducer piston simultaneously and sets up main pressure reducer safety valve gasket for main pressure reducer goes out the pressure in the oral cavity when normal within range, and main pressure reducer superpressure release passageway can not be broken through, and the leakproofness is better, and the stability in use of combination valve is higher.
The invention is further configured to: the commander's formula solenoid valve includes the electro-magnet with main casing body fixed connection and the armature that is attracted by the electro-magnet, the bottom fixedly connected with commander's solenoid valve core assembly of armature, main solenoid valve backpressure chamber has been seted up in the main casing body, commander's solenoid valve core assembly is located main solenoid valve backpressure intracavity, fixedly connected with commander's solenoid valve spring between the interior bottom surface in commander's solenoid valve core assembly and main solenoid valve backpressure chamber, one side intercommunication in main solenoid valve backpressure chamber has the solenoid valve export, main solenoid valve backpressure intracavity slides and is provided with the main solenoid valve core that is close to the solenoid valve export, one side fixedly connected with that main solenoid valve core deviates from the solenoid valve export and the main solenoid valve backpressure chamber's the fixed main solenoid valve spring in chamber wall, main pressure reducer outlet chamber intercommunication is provided with.
Through above-mentioned technical scheme, the back is accomplished in pressure reducer adjustment target pressure, and the solenoid valve has not been switched on yet this moment, commands the upper seal face of solenoid valve core assembly and keeps sealed, and main solenoid valve backpressure chamber pressure is the same with main solenoid valve outlet chamber pressure, and main solenoid valve core is in the closed condition under the effect of main solenoid valve spring. The power of the electromagnetic valve is switched on, the armature moves downwards under the action of suction force generated by the electromagnet until the lower sealing surface of the electromagnetic valve core assembly is commanded to realize sealing, at the moment, gas in the back pressure cavity of the main electromagnetic valve is discharged through the exhaust channel of the solenoid valve, the pressure drop is 0, the main electromagnetic valve core is rapidly opened under the action of unbalanced pressure, the electronic control deflation of the gas cylinder is realized, the outlet pressure is always kept unchanged, the response time is greatly shortened due to the fact that the integrated electromagnetic valve module adopts a commanded structure, and the response speed is greatly increased.
The invention is further configured to: an inflation one-way valve is arranged between the manual switch and the inflation inlet of the gas cylinder.
Through the technical scheme, after the gas cylinder is inflated, the inlet gas source is cut off, the inflation check valve automatically keeps sealing, the sealing performance of the gas cylinder is ensured, and therefore the sealing performance of the whole cold air propulsion system is greatly improved.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the combined valve replaces a plurality of traditional valves in a pipeline and joint mode in the cold air propulsion system, so that the working process of the cold air propulsion system is simplified, and the space utilization rate of the cold air propulsion system is improved;
2. an asynchronous electromagnetic valve is connected between the combined valve and each thruster, so that asynchronous working state control of each thruster is realized, and thrust control in different directions and dimensions is realized;
3. the combination valve in the air conditioning propulsion system is highly integrated, has the effects of a stop valve, a one-way valve, a pressure reducer and an electromagnetic valve, and is simple in space requirement layout requirement and easy to realize.
Drawings
FIG. 1 is a schematic diagram of the synchronous operation of the air propulsion system in the present embodiment;
FIG. 2 is a schematic diagram of the asynchronous operation of the air propulsion system in the present embodiment;
FIG. 3 is a schematic structural view of a combination valve in the present embodiment;
FIG. 4 is a schematic cross-sectional view of the combination valve of the present embodiment;
fig. 5 is a functional schematic of the combination valve.
Reference numerals: 1. a main housing; 11. an inlet chamber; 12. the main pressure reducer enters the cavity; 13. a main pressure reducer outlet chamber; 14. commanding the pressure reducer to enter the oral cavity; 15. commanding the outlet cavity of the pressure reducer; 16. commanding the pressure reducer overpressure release passage; 17. a main pressure reducer overpressure release passage; 18. a main solenoid valve back pressure chamber; 181. commanding an electromagnetic valve exhaust channel; 19. a main solenoid valve outlet chamber; 2. a commanded pressure reducer; 21. commanding the pressure reducer housing; 22. commanding the regulator adjusting disc; 221. pressing the column; 23. commanding the pressure reducer to load a spring; 24. commanding the pressure reducer piston; 25. commanding the safety valve core of the pressure reducer; 26. commanding the valve core of the pressure reducer; 27. commanding a valve core spring of the pressure reducer; 3. a main pressure reducer; 31. a main pressure reducer piston; 32. a main pressure reducer safety valve sealing gasket; 33. a main pressure reducer valve core; 4. a main electromagnetic valve; 41. a main solenoid spool; 42. a main solenoid valve spring; 5. a command type electromagnetic valve; 51. commanding the electromagnetic valve core assembly; 511. an upper sealing block; 512. a thimble; 513. a lower seal block; 52. commanding the solenoid valve spring; 6. measuring a pressure point of the gas cylinder; 7. an outlet pressure measurement point; 8. an outlet of the solenoid valve; 9. a manual switch; 10. an inflation check valve; 101. an electromagnet; 102. an armature; 1001. a gas cylinder group; 1002. a combination valve; 1003. a multi-channel pipeline; 1004. a thruster unit; 1005. an asynchronous solenoid valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A cold air propulsion system comprises a gas cylinder group 1001, a combination valve 1002, a multi-channel pipeline 1003 and a thruster unit 1004 which are sequentially communicated, wherein the gas cylinder group 1001 comprises at least one gas cylinder, if one gas cylinder is adopted, the combination valve 1002 is directly installed on the single gas cylinder and communicated with the gas cylinder, and if a plurality of gas cylinders are adopted, the combination valve 1002 is communicated with the combination valve 1002 after the plurality of pipelines converge. The combination valve 1002 is highly integrated, and has functions of a stop valve, a check valve, a pressure reducer, and an electromagnetic valve, the multi-channel pipe 1003 is selected according to the number of thrusters in the thruster unit 1004, specifically, if one thruster is used in the thruster unit 1004, the multi-path pipe 1003 uses one straight passage to communicate the thruster unit 1004 with the combination valve 1002, and if the thruster unit 1004 uses two thrusters, the multi-path pipe 1003 uses a three-way to communicate two thrusters of the thruster unit 1004 with the combination valve 1002, and if the thruster unit 1004 uses three thrusters, the multi-channel conduit 1003 uses a four-way junction to communicate … … the three thrusters of the thruster unit 1004 with the combiner valve 1002 and so on, therefore, after the gas in the gas cylinder group 1001 passes through the combined valve 1002, the gas can be divided into one path, two paths or multiple paths according to actual conditions to realize synchronous work.
As shown in fig. 2, an asynchronous solenoid valve 1005 may be connected between the combination valve 1002 and the thruster unit 1004 according to actual needs, specifically, the asynchronous solenoid valve 1005 is communicated between the multi-channel pipeline 1003 and the thruster unit 1004, and the asynchronous solenoid valve 1005 may implement asynchronous working state control of each thruster, thereby implementing thrust control in different directions and dimensions.
With reference to fig. 1 and 5, the combination valve 1002 mainly integrates the inflation check valve 10, the command type pressure reducer 2, the command type electromagnetic valve 5, the manual switch 9, the main pressure reducer 3, and the main electromagnetic valve 4, during inflation, the gas cylinder is inflated from the inflation inlet of the gas cylinder through the inflation check valve 10, after inflation, the inflation check valve 10 is automatically closed to ensure sealing, during deflation, the manual switch 9 is firstly ensured to be in an open state, the electromagnetic valve is energized after the command type pressure reducer 2 is adjusted, the command type electromagnetic valve 5 first acts, then the main electromagnetic valve 4 is driven to act, gas flows to the outlet according to a set pressure fluctuation decompression target, and stabilizes the outlet pressure to a decompression target value, and has high precision, the outlet is extremely small, after deflation of the gas cylinder, the electromagnetic valve is powered off, the command type electromagnetic valve 5 and the main electromagnetic valve 4 are successively closed, and the.
Referring to fig. 3 and 4, the commander type pressure reducer 2 includes a commander pressure reducer housing 21, a commander pressure reducer adjustment dial 22, a commander pressure reducer loading spring 23, a commander pressure reducer piston 24, a commander pressure reducer safety spool 25, a commander pressure reducer spool 26, and a commander pressure reducer spool spring 27, specifically, a commander pressure reducer spool 26 and a commander pressure reducer spool spring 27 are provided in the commander pressure reducer inlet chamber 14, wherein the commander pressure reducer spool 26 slides in the commander pressure reducer inlet chamber 14, one end of the commander spool spring 27 is fixedly connected with the bottom of the commander pressure reducer spool 26, the other end is fixedly connected with the inner bottom of the commander pressure reducer inlet chamber 14, a commander spool housing 21 integrally formed with the main housing 1 is provided right above the commander pressure reducer spool 26, the inside of the commander pressure reducer housing 21 is, command pressure reducer casing 21 slides and is provided with command pressure reducer adjustment dish 22 and command pressure reducer piston 24, command pressure reducer adjustment dish 22 is located command pressure reducer piston 24 directly over, and through command pressure reducer loading spring 23 fixed connection between the two, the top of command pressure reducer adjustment dish 22 is provided with the pressure post 221 with command pressure reducer casing 21 inner wall screw-thread fit, command pressure reducer overpressure release passageway 16 has been seted up to command pressure reducer piston 24's intermediate position department, be provided with command pressure reducer safety case 25 between command pressure reducer case 26 and the command pressure reducer piston 24, the top of command pressure reducer safety case 25 and command pressure reducer piston 24 butt and plug up command pressure reducer overpressure release passageway 16, the bottom size of command pressure reducer safety case 25 is less than its self top size, and enter into command pressure reducer entrance chamber 14 after the gas passage that corresponds and support with command pressure reducer case 26 and command pressure reducer case 25's bottom, command pressure reducer safety case 25 And (6) connecting.
With reference to fig. 3 and 4, the main pressure reducer 3 includes a main pressure reducer piston 31, a main pressure reducer safety valve gasket 32 and a main pressure reducer valve element 33, specifically, the main pressure reducer piston 31 is slidably disposed in the command pressure reducer outlet cavity 15, the main pressure reducer outlet cavity 13 is disposed below the main pressure reducer piston 31, specifically, a main pressure reducer overpressure release passage 17 communicated with the main pressure reducer outlet cavity 13 is disposed on the main pressure reducer piston 31, the other end of the main pressure reducer overpressure release passage 17 is communicated with the outside, a main pressure reducer valve element 33 is disposed in the main pressure reducer outlet cavity 13, the top end of the main pressure reducer valve element 33 is round-head-shaped and abuts against the middle position of the main pressure reducer piston 31 to block the main pressure reducer overpressure release passage 17, the main pressure reducer overpressure release passage 17 is fixedly provided with the main pressure reducer safety valve gasket 32 around the round-head end close to, so that the main pressure reducer overpressure release channel 17 is well sealed when remaining sealed. And a gas cylinder pressure measuring point 6 is arranged at the outlet position on one side of the outlet cavity 13 of the main pressure reducer and is used for being connected with a pressure detector to monitor the pressure of the gas cylinder.
With reference to fig. 3 and 4, the main electromagnetic valve 4 includes a main electromagnetic valve core 41 and a main electromagnetic valve spring 42, specifically, the main electromagnetic valve back pressure cavity 18 is provided over the valve core of the manual switch 9 of the main housing 1, one side of the main electromagnetic valve back pressure cavity 18 departing from the center of the main housing 1 is provided with an electromagnetic valve outlet 8, the main electromagnetic valve core 41 and the main electromagnetic valve spring 42 are both located in the main electromagnetic valve back pressure cavity 18, one end of the main electromagnetic valve spring 42 is fixedly connected with the main electromagnetic valve core 41, the other end of the main electromagnetic valve back pressure cavity 18 is fixedly connected with the inner wall of the side far away from the electromagnetic valve outlet 8, an outlet pressure measuring point 7 communicated with the main pressure reducer outlet cavity 13 is provided below the electromagnetic valve outlet 8, the outlet pressure measuring point 7 can detect the pressure value after pressure reduction, thereby the pressure after pressure reduction can be monitored, and the.
Referring to fig. 3 and 4, the main solenoid valve back pressure chamber 18 includes two parts connected by a gas channel, the main solenoid valve back pressure chamber 18 of the two parts is arranged in a vertical connection manner, and the main solenoid valve core 41 and the main solenoid valve spring 42 are located in the main solenoid valve back pressure chamber 18 of the lower part, the pilot solenoid valve 5 is arranged in the main solenoid valve back pressure chamber 18 of the upper part, the pilot solenoid valve 5 includes a pilot solenoid valve core assembly 51 and a pilot solenoid valve spring 52, the pilot solenoid valve core assembly 51 includes an upper sealing block 511, a thimble 512 and a lower sealing block 513, wherein the upper sealing block 511 and the lower sealing block 513 are made of fluoroplastics and are assembled by a threaded connection manner, when in installation, the thimble 512 penetrates through the upper sealing block 511 from bottom to top, then the external thread of the lower sealing block 513 is screwed into the internal thread of the upper sealing block, the thimble 512 is clamped to form the pilot solenoid valve core assembly 51, and the top end of the upper sealing block 511 and the bottom end of the lower sealing block 513 are both conical surfaces, so that plastic sealing surfaces of an upper conical surface and a lower conical surface can be realized, complex nonmetal-metal combination procedures such as hot pressing, edge rolling and the like are avoided, and the cost and the process complexity are greatly reduced. The tapered surface of the lower seal block 513 is plugged into a gas passage that communicates with the lower portion of the main solenoid valve back pressure chamber 18.
Referring to fig. 3 and 4, the main housing 1 is provided with electromagnets 101 disposed opposite to each other above the solenoid valve core assembly 51, an armature 102 is disposed between the electromagnets 101, and the thimble 512 passes through the gas passage and is fixedly connected to the armature 102. And one side of the gas channel where the thimble 512 is located is provided with a command electromagnetic valve exhaust channel 181 communicated with the outside.
As shown in fig. 5, the inflation check valve 10 is disposed between the manual switch 9 and the gas cylinder inflation inlet, the gas cylinder inflation inlet is connected with an inflation device for inflating the gas cylinder, and the gas cylinder can be rapidly sealed after the gas cylinder is inflated by the inflation check valve 10, so that the sealing performance is maintained.
The implementation principle of the above embodiment is as follows: when the cold air propulsion system works, firstly, a tool is used for rotating a valve core of the manual switch 9 to an open state, at the moment, the inlet cavity 11 is communicated with the main pressure reducer inlet cavity 12, and the pressure of the inlet cavity 14 of the pressure reducer is also controlled to be P1 on the assumption that the pressure of the inlet cavity and the pressure of the main pressure reducer are both P1. Rotatory compression leg 221 downwards, compression leg 221 pushes down and commands pressure reducer adjustment disc 22, compression commander pressure reducer load spring 23, drive commander pressure reducer piston 24 downstream, commander pressure reducer safety case 25 will command pressure reducer case 26 and push away, gaseous by commanding pressure reducer entry chamber 14 through the gaseous passageway entering commander pressure reducer export chamber 15 around the case, along with slowly building up of pressure, the effort that is being used in commander pressure reducer piston 24 slowly increases, promote pressure reducer piston upward movement, commander pressure reducer case 26 moves up under commander pressure reducer case spring 27's effect until closing, commander pressure reducer case 26's atress is balanced.
Assuming that the pressure of the command pressure reducer outlet cavity 15 is P2, the pressure of the main pressure reducer outlet cavity 13 is P3, the gas pressures applied to the upper end and the lower end of the main pressure reducer piston 31 are P2 and P3, and the horizontal projection areas of the upper gas pressure and the lower gas pressure applied to the main pressure reducer piston 31 are the same, when the main pressure reducer valve element 33 is in a balanced state, P2 is P3, namely the pressure value of the outlet pressure measuring point 7 represents the pressure reduction pressure, and the gas cylinder pressure P1 can be reduced to the target pressure P3 according to the indication number of the pressure measuring point during operation.
After the pressure reducer modules (namely the main pressure reducer 3 and the commanded pressure reducer 2) complete the adjustment of the target pressure, the solenoid valve module is powered on from the upper position at this time, the upper sealing surface of the solenoid valve core assembly 51 is commanded to keep sealed, the pressure of the main solenoid valve back pressure cavity 18 is the same as the pressure of the main solenoid valve outlet cavity 19, which is P3, and the main solenoid valve core 41 is in a closed state under the action of the main solenoid valve spring 42. When the power supply is switched on, the armature moves downwards under the action of the suction force generated by the electromagnet 101 until the lower sealing surface of the electromagnetic valve core assembly 51 is commanded to realize sealing, at the moment, the gas in the main electromagnetic valve back pressure cavity 18 is discharged through the command electromagnetic valve exhaust channel 181, the pressure is reduced to 0, the main electromagnetic valve core 41 is rapidly opened under the action of the unbalanced area gas pressure, the electric control of the gas cylinder is abandoned, and the outlet pressure is always kept unchanged at P3. Because the integrated electromagnetic valve module adopts a command structure, the response time is greatly shortened, and the response speed is greatly increased.
When the pressure P1 of the gas cylinder is obviously reduced along with the deflation of the gas cylinder, the outlet cavity 15 of the pressure reducer is always in a closed state under the command, so that the P2 is always kept unchanged, and the P2 is always equal to the P3 under the balanced state of the main pressure reducer valve core 33, so that the P3 is also basically kept unchanged, the influence of the change of the upstream pressure P1 on the P2 is isolated through the command of the pressure reducer, the stable precision of the outlet pressure P3 is greatly improved, and the operation of the propeller is stable and reliable.
If the command pressure reducer valve core 26 of the combined valve has abnormal conditions such as leakage and the like, the P2 is continuously raised, when the P2 is higher than a certain value, the command pressure reducer piston 24 moves upwards to be separated from contact with the command pressure reducer safety valve core 25, the command pressure reducer overpressure release channel 16 is opened at the moment, gas is released to the outside, and overpressure protection of the command pressure reducer 2 is realized. If an abnormal condition occurs at the downstream of the combined valve for deflation, the pressure P3 is continuously raised, when the pressure P3 is higher than the pressure P2 for a certain value, the main pressure reducer piston 31 moves upwards to be separated from the round head of the main pressure reducer valve core 33, the main pressure reducer overpressure release channel 17 is opened at the moment, the pressure P3 is released to the outside through the cavity inside the main pressure reducer valve core 33, gas is released to the outside, and overpressure protection of the main pressure reducer 3 is realized. Thus, the present stress-reducer module may enable a "double safety protection" of the commanded stress-reducer 2 and the main stress-reducer 3.
If the decompression module of the combination valve completely fails or other emergency situations occur, a tool can be used for rotating the valve core of the manual switch 9 to a closed state, and at the moment, the inlet cavity 11 and the main decompressor inlet cavity 12 are completely isolated, so that final safety protection is realized.
The actual measurement shows that when the pressure of the gas cylinder is changed within the pressure range of the inlet cavity of the main pressure reducer of 35-20Mp, the pressure of the outlet of the pressure reducer can be accurately controlled within the range of the inlet cavity of the main pressure reducer of 15 +/-0.5 Mp. Meanwhile, the overpressure protection function can effectively avoid possible damage to the valve when the work is abnormal. The response time of the solenoid valve for locking and closing can reach within 10 ms.
In conclusion, the power source consists of one or more high-pressure gas cylinders, the high-pressure gas cylinders are connected through the pipeline and pass through the combined valve, the combined valve simultaneously has the functions of a stop valve, a one-way valve, a pressure reducer and an electromagnetic valve, the flow direction, the pressure reduction and the on-off control of gas are realized, and the combined valve is connected with the thruster through the pipeline to generate required thrust during working.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A chilled air propulsion system comprising a cylinder group (1001) formed of at least one cylinder, characterized in that: the gas cylinder group (1001) is communicated with a combined valve (1002), an inflation one-way valve (10) for one-way inflation, a command type pressure reducer (2) and a main pressure reducer (3) for outputting high pressure of a gas cylinder and having an overpressure safety protection function at the same time are integrated in the combined valve (1002), a main electromagnetic valve (4) and a command type electromagnetic valve (5) for electrically controlling deflation of the gas cylinder, the outlet of the combined valve (1002) is communicated with a thruster unit (1004) formed by at least one thruster, the combined valve (1002) comprises a main shell (1), one end of the main shell (1) is provided with an inlet cavity (11) communicated with the gas cylinder, and a manual switch (9), the command type pressure reducer (2), the command type electromagnetic valve (5), the main electromagnetic valve (3) and the main electromagnetic valve (4) are integrated in the main shell (1); the commanding type pressure reducer (2) comprises a commanding pressure reducer shell (21), the interior of the commanding pressure reducer shell (21) is communicated with the inlet cavity (11), a commanding pressure reducer adjusting disc (22) and a commanding pressure reducer piston (24) are arranged in the commanding pressure reducer shell (21) in a sliding manner, a pressure column (221) which is in threaded fit with the inner wall of the commanding pressure reducer shell (21) is arranged above the commanding adjusting disc (22) in a butting manner, the commanding pressure reducer piston (24) is positioned below the commanding pressure reducer adjusting disc (22) and is fixedly connected with a commanding pressure reducer loading spring (23) between the commanding pressure reducer adjusting disc and the commanding pressure reducer piston, a commanding overpressure reducer releasing channel (16) is arranged on the commanding pressure reducer piston (24), a commanding pressure reducer outlet cavity (15) is arranged in the commanding pressure reducer shell (21) below the commanding pressure reducer piston (24), and the commanding pressure reducer outlet cavity (15) is, a commanding pressure reducer inlet cavity (14) communicated with the inlet cavity (11) is formed in the commanding pressure reducer shell (21), a commanding pressure reducer valve core (26) is arranged in the commanding pressure reducer inlet cavity (14) in a sliding mode, a commanding pressure reducer valve core spring (27) is fixedly connected between the commanding pressure reducer valve core (26) and the inner bottom surface of the commanding pressure reducer inlet cavity (14), and a commanding pressure reducer safety valve core (25) used for blocking a commanding overpressure release channel (16) is arranged between a commanding pressure reducer piston (24) and the commanding pressure reducer valve core (26); the main pressure reducer (3) comprises a main pressure reducer piston (31) which is arranged in the commanding pressure reducer outlet cavity (15) in a sliding mode, a main pressure reducer (3) overpressure release channel (17) used for pressure relief is formed in the main pressure reducer piston (31), a main pressure reducer outlet cavity (13) communicated with the commanding pressure reducer outlet cavity (15) is formed in the lower portion of the main pressure reducer piston (31), a main pressure reducer valve core (33) is arranged in the main pressure reducer outlet cavity (13), and the top end of the main pressure reducer valve core (33) blocks the main pressure reducer overpressure release channel (17).
2. A cold air propulsion system according to claim 1, wherein: a multi-channel pipeline (1003) is communicated between the combined valve (1002) and the thruster unit (1004), and the multi-channel pipeline (1003) selects a straight-through pipeline, a three-way pipeline or a four-way pipeline according to the number of thrusters in the thruster unit (1004).
3. A cold air propulsion system according to claim 2, wherein: an asynchronous electromagnetic valve (1005) is communicated between the multi-channel pipeline (1003) and the thruster unit (1004).
4. A cold air propulsion system according to claim 3, wherein: the top end of the main pressure reducer valve core (33) is round-head-shaped, and a main pressure reducer safety valve sealing gasket (32) is fixedly arranged at the position where the main pressure reducer piston (31) is abutted to the main pressure reducer valve core (33).
5. A cold air propulsion system according to claim 4, wherein: the command type electromagnetic valve (5) comprises an electromagnet (101) fixedly connected with the main shell (1) and an armature (102) attracted by the electromagnet (101), the bottom of the armature (102) is fixedly connected with a command electromagnetic valve core assembly (51), a main electromagnetic valve back pressure cavity (18) is formed in the main shell (1), the command electromagnetic valve core assembly (51) is positioned in the main electromagnetic valve back pressure cavity (18), a command electromagnetic valve spring (52) is fixedly connected between the command electromagnetic valve core assembly (51) and the inner bottom surface of the main electromagnetic valve back pressure cavity (18), one side of the main electromagnetic valve back pressure cavity (18) is communicated with an electromagnetic valve outlet (8), a main electromagnetic valve core (41) close to the electromagnetic valve outlet (8) is arranged in the main electromagnetic valve back pressure cavity (18) in a sliding mode, one side, away from the main electromagnetic valve core (41), of the main electromagnetic valve is fixedly connected with a main electromagnetic valve spring (42) fixed with the electromagnetic valve back pressure cavity (18), the main pressure reducer outlet cavity (13) is communicated with a main electromagnetic valve outlet cavity (19), and the main electromagnetic valve outlet cavity (19) is communicated with a main electromagnetic valve back pressure cavity (18).
6. A cold air propulsion system according to claim 1, wherein: an inflation one-way valve (10) is arranged between the manual switch (9) and the inflation inlet of the gas cylinder.
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| US20190263541A1 (en) * | 2018-02-23 | 2019-08-29 | Mitsubishi Heavy Industries, Ltd. | Thruster control device and thruster control method |
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| CN1486904A (en) * | 2003-07-25 | 2004-04-07 | 清华大学 | Miniature integral cold air propeller |
| CN101907040A (en) * | 2010-07-23 | 2010-12-08 | 北京航空航天大学 | Nitrogen cold gas micro propulsion device adopting ring storage tank |
| US20190263541A1 (en) * | 2018-02-23 | 2019-08-29 | Mitsubishi Heavy Industries, Ltd. | Thruster control device and thruster control method |
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