CN111810320B - Control and blowing system, liquid rocket engine and rocket - Google Patents
Control and blowing system, liquid rocket engine and rocket Download PDFInfo
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- CN111810320B CN111810320B CN202010714800.5A CN202010714800A CN111810320B CN 111810320 B CN111810320 B CN 111810320B CN 202010714800 A CN202010714800 A CN 202010714800A CN 111810320 B CN111810320 B CN 111810320B
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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
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
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Abstract
The invention relates to the technical field of spaceflight, in particular to a control and blowing system, a liquid rocket engine and a rocket, wherein the control and blowing system comprises: the air control system comprises a control air bottle, a control electromagnetic valve group and a first pipeline for connecting the control air bottle and the control electromagnetic valve group, wherein the first pipeline is provided with a first reversing valve; the blowing system comprises a blowing gas cylinder, a blowing electromagnetic valve group and a second pipeline for connecting the blowing gas cylinder and the blowing electromagnetic valve group, and a second reversing valve is arranged on the second pipeline; one end of the first branch is communicated with the second pipeline, and the other end of the first branch is connected with one end of the first reversing valve; and one end of the second branch is communicated with the first pipeline, and the other end of the second branch is connected with one end of the second reversing valve. The control gas cylinders and the blowing gas cylinders are mutually redundant, so that the number of the gas cylinders can be reduced, the carrying capacity of the rocket can be ensured, the reliability of a control and blowing system is improved, and the engine can still work normally under the condition that one of the gas cylinders has abnormal pressure.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to a control and blowing system, a liquid rocket engine and a rocket.
Background
Liquid rocket engines have a number of pneumatic valves that control the flow and shutoff of engine propellant. Pneumatic valves are controlled by compressed gas (such as nitrogen or helium) and therefore rockets in which hydrodynamic systems are present are generally provided with a gas cylinder group which controls the pneumatic valves.
For low-temperature liquid rocket engines, particularly liquid hydrogen liquid oxygen engines, liquid oxygen methane engines and liquid oxygen kerosene engines, an engine blowing gas cylinder group is generally arranged and used for starting and shutting down blowing in the working process of the engine. When the engine is started, blowing is carried out to prevent the propellant from forming cavities in series, so that the ignition reliability is improved; the propellant flows into the thrust chamber to be continuously combusted and generate aftereffect impulse under the condition of no control, the deviation ratio of the control precision of the engine is large, the propellant can be prevented from reversely flowing into the cavity during shutdown, and deflagration and even explosion risks during shutdown are avoided.
It can be seen that the low-temperature liquid rocket engine is provided with a plurality of gas cylinder groups, and a gas control system and a blowing system of the engine are formed by matching with required pipelines, valves and other equipment. At present, a pneumatic control system and a blowing system of a low-temperature liquid rocket engine are often independently arranged, the number of gas cylinders is more in order to increase safety margin, after the engine finishes working, the residual pressure in the gas cylinders is higher, and the number of the redundant gas cylinders means the reduction of the carrying capacity of an ignited rocket.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the carrying capacity of the rocket is reduced due to the fact that the number of the air cylinders of the air control system and the blowing system in the prior art is large, and provide the control system, the blowing system, the liquid rocket engine and the rocket, wherein the number of the air cylinders can be reduced, so that the carrying capacity of the rocket can be ensured.
In order to solve the above technical problem, the present invention provides a control and blowing system, comprising:
the pneumatic control system comprises a control gas cylinder, a control electromagnetic valve group and a first pipeline for connecting the control gas cylinder and the control electromagnetic valve group, wherein a first reversing valve is arranged on the first pipeline;
the blowing system comprises a blowing gas cylinder, a blowing electromagnetic valve group and a second pipeline for connecting the blowing gas cylinder and the blowing electromagnetic valve group, and a second reversing valve is arranged on the second pipeline;
one end of the first branch is communicated with the second pipeline, and the other end of the first branch is connected with one end of the first reversing valve;
and one end of the second branch is communicated with the first pipeline, and the other end of the second branch is connected with one end of the second reversing valve.
The control and blowing system further comprises a controller, a first reversing electromagnetic valve is arranged on the first branch, a first sensor is arranged in the control gas cylinder, and the controller is used for controlling the first reversing electromagnetic valve to be opened when the gas pressure monitored by the first sensor is lower than a first preset gas pressure.
The second branch is provided with a second reversing electromagnetic valve, a second sensor is arranged in the blowing gas cylinder, and the controller is used for controlling the second reversing electromagnetic valve to be opened when the air pressure detected by the second sensor is lower than a second preset air pressure.
The first pipeline is provided with a first stop valve and a first reducing valve, the first reducing valve is positioned at the downstream position of the first stop valve and at the upstream position of the first reversing valve, and the connecting point of the second branch and the first pipeline is positioned at the downstream position of the first reducing valve and at the upstream position of the first reversing valve;
the second pipeline is provided with a second stop valve and a second reducing valve, the second reducing valve is located at the downstream position of the second stop valve and at the upstream position of the second reversing valve, and the connecting point of the first branch and the second pipeline is located at the downstream position of the second reversing valve.
The control and blowing system also comprises an inflation inlet, the inflation inlet is suitable for being connected with an air source, and the control air bottle and the blowing air bottle are connected with the same inflation inlet.
The air charging port is connected with an air charging main path, the control air bottle is communicated with the air charging main path through a first air charging branch path, the blowing air bottle is communicated with the air charging main path through a second air charging branch path, a first air charging one-way valve is arranged on the first air charging branch path, and a second air charging one-way valve is arranged on the second air charging branch path.
And a first throttling orifice plate is arranged on the first inflation branch, and a second throttling orifice plate is arranged on the second inflation branch.
And the main inflation path is provided with a gas filter.
The control gas cylinder is also communicated with a first deflation valve, and the blowing gas cylinder is communicated with a second deflation valve.
The blow-off solenoid valve group includes:
the first blowing electromagnetic valve is connected with a first blowing branch, and the first blowing branch is suitable for blowing the fuel cavity of the thrust chamber of the engine;
the second blowing electromagnetic valve is connected with a second blowing branch, and the second blowing branch is suitable for blowing the oxygen cavity of the thrust chamber of the engine;
the third blowing electromagnetic valve is connected with a third blowing branch, and the third blowing branch is suitable for blowing the fuel cavity of the engine generator;
the fourth blowing electromagnetic valve is connected with a fourth blowing branch, and the fourth blowing branch is suitable for blowing the oxygen cavity of the engine generator;
the controller is suitable for controlling the first blow-off electromagnetic valve, the second blow-off electromagnetic valve, the third blow-off electromagnetic valve and the fourth blow-off electromagnetic valve to be opened in sequence when the engine performs depth thrust adjustment.
The invention also provides a liquid rocket engine which comprises the control and blowing system.
The invention also provides a rocket comprising the liquid rocket engine.
The technical scheme of the invention has the following advantages:
1. according to the control and blowing system provided by the invention, when the section of the flow path from the control gas cylinder to the first reversing valve on the first pipeline leaks at a certain position due to some reason, the gas pressure in the first pipeline is reduced, the first branch line forces the first reversing valve to be reversed to the first branch line to be communicated with the first pipeline due to the existence of pressure difference, the gas in the blowing gas cylinder can enter the control electromagnetic valve group through the first branch line, and the pneumatic valve of the engine can still be reliably controlled; when the section of the flow path from the blow-off gas cylinder on the second pipeline to the second reversing valve leaks at a certain position due to a certain reason, the section of the gas pressure on the second pipeline is reduced, due to the existence of pressure difference, the second branch line forces the second reversing valve to be reversed to the second branch line to be communicated with the second pipeline, the gas in the control gas cylinder can enter the blow-off electromagnetic valve group through the second branch line, and finally blow-off is carried out.
2. The control and blowing system provided by the invention further comprises a controller, wherein a first reversing electromagnetic valve is arranged on the first branch, a first sensor is arranged in the control gas cylinder, the controller is used for controlling the first reversing electromagnetic valve to be opened when the gas pressure monitored by the first sensor is lower than a first preset gas pressure, when a certain position of a section of flow path from the control gas cylinder to the first reversing valve on the first pipeline leaks due to some reason, the gas pressure of the control gas cylinder can be rapidly reduced, when the gas pressure monitored by the first sensor is lower than the preset gas pressure, the controller automatically controls the first reversing electromagnetic valve to be opened, the gas blown from the control gas cylinder can enter the control electromagnetic valve group through the first branch, and the pneumatic valve of an engine can still be reliably controlled.
3. According to the control and blowing system provided by the invention, the second branch is provided with the second reversing electromagnetic valve, the blowing gas cylinder is internally provided with the second sensor, the controller is used for controlling the second reversing electromagnetic valve to be opened when the air pressure detected by the second sensor is lower than a second preset air pressure, when a certain position of a section of flow path from the blowing gas cylinder to the second reversing valve on the second pipeline leaks due to some reason, the air pressure of the blowing gas cylinder can be rapidly reduced, and when the air pressure detected by the second sensor is lower than the preset air pressure, the controller automatically controls the second reversing electromagnetic valve to be opened, so that the gas of the gas cylinder can enter the blowing electromagnetic valve set through the second branch, and finally blowing is carried out.
4. According to the control and blowing system provided by the invention, the first pipeline is provided with the first stop valve and the first reducing valve, the first reducing valve is positioned at the downstream position of the first stop valve and at the upstream position of the first reversing valve, and the connection point of the second branch and the first pipeline is positioned at the downstream position of the first reducing valve and at the upstream position of the first reversing valve; the second pipeline is provided with a second stop valve and a second reducing valve, the second reducing valve is located at the downstream position of the second stop valve and at the upstream position of the second reversing valve, and the connecting point of the first branch and the second pipeline is located at the downstream position of the second reversing valve. The first stop valve is used for controlling the on-off of the first pipeline, the first pressure reducing valve can reduce the pressure of high-pressure gas in the control gas cylinder to low-pressure gas meeting the requirement, the second stop valve is used for controlling the on-off of the second pipeline, and the second pressure reducing valve can reduce the pressure of the high-pressure gas in the blowing gas cylinder to low-pressure gas meeting the requirement.
5. According to the control and blowing system provided by the invention, the control and blowing system also comprises the inflation inlet, the inflation inlet is suitable for being connected with an air source, the control air bottle and the blowing air bottle are connected with the same inflation inlet, and one inflation inlet can simultaneously inflate the control air bottle and the blowing air bottle, so that the inflation efficiency can be improved, and the control air bottle and the blowing air bottle are integrated into a whole, so that the structure is simpler.
6. According to the control and blowing system provided by the invention, the inflation inlet is connected with the main inflation path, the control gas cylinder is communicated with the main inflation path through the first inflation branch, the blowing gas cylinder is communicated with the main inflation path through the second inflation branch, the first inflation branch is provided with the first inflation one-way valve, the second inflation branch is provided with the second inflation one-way valve, and the first inflation one-way valve and the second inflation one-way valve can avoid reverse air leakage during inflation.
7. According to the control and blowing system provided by the invention, the first air inflation branch is provided with the first throttle orifice, the second air inflation branch is provided with the second throttle orifice, and the first throttle orifice and the second throttle orifice can limit the air inflation flow, so that the situation that the air cylinder exceeds the allowable temperature due to the overhigh air inflation speed is avoided.
8. According to the control and blowing system provided by the invention, the gas filter is arranged on the inflation main path, and the gas filter can prevent impurities in inflation gas from entering the gas cylinder to influence the working reliability.
9. According to the control and blowing system provided by the invention, the control gas cylinder is also communicated with the first air release valve, the blowing gas cylinder is communicated with the second air release valve, and the arrangement of the first air release valve and the second air release valve can release residual gas in the control gas cylinder and the blowing gas cylinder after the control and blowing system finishes working, so that the load of a rocket can be reduced.
10. According to the control and blowing system provided by the invention, the controller is suitable for controlling the first blowing electromagnetic valve, the second blowing electromagnetic valve, the third blowing electromagnetic valve and the fourth blowing electromagnetic valve to be opened in sequence when the engine performs deep thrust adjustment, and blowing gas can enter the head cavity to emulsify propellant and improve the pressure drop of the nozzle when the engine performs deep thrust adjustment, so that the starting reliability of the engine is ensured, and the thrust adjustment range of the engine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a control and blowing system provided in embodiment 1 of the present invention.
Description of reference numerals:
1. controlling the gas cylinder; 2. blowing off the gas cylinder; 3. a gas filter; 4-1, a first orifice plate; 4-2, a second orifice plate; 5-1, a first inflation one-way valve; 5-2, a second inflation one-way valve; 6-1, a first air release valve; 6-2, a second air release valve; 7-1, a first stop valve; 7-2, a second stop valve; 8-1, a first pressure reducing valve; 8-2, a second pressure reducing valve; 9-1, a first reversing valve; 9-2, a second reversing valve; 10-blowing off the electromagnetic valve group; 11-controlling the electromagnetic valve group; 12-blowing off the check valve; 13-1, a first reversing electromagnetic valve; 13-2, a second reversing electromagnetic valve; e1, an inflation inlet; e2, first vent; e3, secondary vent.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
For low-temperature liquid rocket engines, particularly liquid hydrogen liquid oxygen engines, liquid oxygen methane engines and liquid oxygen kerosene engines, an engine blowing gas cylinder group is generally arranged and used for starting and shutting down blowing in the working process of the engine. When the engine is started, blowing is carried out to prevent the propellant from forming cavities in series, so that the ignition reliability is improved; the propellant flows into the thrust chamber to be continuously combusted and generate aftereffect impulse under the condition of no control, the deviation ratio of the control precision of the engine is large, the propellant can be prevented from reversely flowing into the cavity during shutdown, and deflagration and even explosion risks during shutdown are avoided.
It can be seen that the low-temperature liquid rocket engine is provided with a plurality of gas cylinder groups, and a gas control system and a blowing system of the engine are formed by matching with required pipelines, valves and other equipment. At present, a pneumatic control system and a blowing system of a low-temperature liquid rocket engine are often independently arranged, the number of gas cylinders is more in order to increase safety margin, after the engine finishes working, the residual pressure in the gas cylinders is higher, and the number of the redundant gas cylinders means the reduction of the carrying capacity of an ignited rocket.
Meanwhile, the depth thrust adjustment cannot be carried out due to the fact that the pressure drop of a nozzle of the existing low-temperature liquid rocket engine is too low.
Example 1
This embodiment provides a specific embodiment of a control, blow-off system that reduces the number of cylinders and thereby ensures rocket carrying capacity. As shown in fig. 1, the control and blowing system includes: the device comprises a pneumatic control system, a blowing system, a first branch and a second branch.
The air control system comprises a control air bottle 1, a control electromagnetic valve group 11 and a first pipeline for connecting the control air bottle 1 and the control electromagnetic valve group 11, wherein a first reversing valve 9-1 is arranged on the first pipeline; the blowing system comprises a blowing gas cylinder 2, a blowing electromagnetic valve group 10 and a second pipeline for connecting the blowing gas cylinder 2 and the blowing electromagnetic valve group 10, and a second reversing valve 9-2 is arranged on the second pipeline; one end of the first branch is communicated with the second pipeline, and the other end of the first branch is connected with one end of a first reversing valve 9-1; one end of the second branch is communicated with the first pipeline, and the other end of the second branch is connected with one end of a second reversing valve 9-2.
According to the control and blowing system, when a section of a flow path from a control gas bottle 1 to a first reversing valve 9-1 on a first pipeline leaks at a certain position due to some reason, the gas pressure in the first pipeline is reduced, the first branch forces the first reversing valve 9-1 to be reversed to a first branch to be communicated with the first pipeline due to the existence of pressure difference, the gas in a blowing gas bottle 2 can enter a control electromagnetic valve group 11 through the first branch, and the pneumatic valve of an engine can still be reliably controlled; when the section of the flow path from the blow-off gas cylinder 2 to the second reversing valve 9-2 on the second pipeline leaks at a certain position due to some reason, the air pressure of the section on the second pipeline is reduced, the second branch forces the second reversing valve 9-2 to be reversed to the second branch to be communicated with the second pipeline due to the existence of pressure difference, the gas in the control gas cylinder 1 can enter the blow-off electromagnetic valve group 10 through the second branch, and finally blowing is carried out, the number of the gas cylinders can be reduced due to the mutual redundancy of the control gas cylinder 1 and the blow-off gas cylinder 2, so that the carrying capacity of the rocket can be ensured, the reliability of a control and blow-off system is improved, and the engine can still work normally under the condition that the pressure of one of the gas cylinders is abnormally reduced.
On the basis of the above embodiment, in a preferred embodiment, the control and blowing system further includes a controller, the first branch is provided with a first reversing solenoid valve 13-1, the control gas cylinder 1 is provided with a first sensor, and the controller is configured to control the first reversing solenoid valve 13-1 to open when the gas pressure monitored by the first sensor is lower than a first preset gas pressure. When the section of the flow path from the control gas bottle 1 to the first reversing valve 9-1 on the first pipeline leaks at a certain position due to some reason, the air pressure of the control gas bottle 1 is rapidly reduced, when the first sensor monitors that the air pressure is lower than the preset air pressure, the controller automatically controls the first reversing electromagnetic valve 13-1 to be opened, the gas blowing off the gas bottle 2 can enter the control electromagnetic valve group 11 through the first branch, and the pneumatic valve of the engine can still be reliably controlled.
On the basis of the above embodiment, in a preferred embodiment, a second reversing solenoid valve 13-2 is disposed on the second branch, a second sensor is disposed in the blow-off gas cylinder 2, and the controller is configured to control the second reversing solenoid valve 13-2 to open when the gas pressure detected by the second sensor is lower than a second preset gas pressure. When the section of the flow path from the blow-off gas cylinder 2 to the second reversing valve 9-2 on the second pipeline leaks at a certain position due to some reason, the air pressure of the blow-off gas cylinder 2 is rapidly reduced, when the second sensor monitors that the air pressure is lower than the preset air pressure, the controller automatically controls the second reversing electromagnetic valve 13-2 to be opened, the gas of the control gas cylinder 1 can enter the blow-off electromagnetic valve group 10 through the second branch, and finally respectively enters a fuel cavity, an oxygen cavity of an engine thrust chamber, a fuel cavity of a generator and an oxygen cavity.
On the basis of the above embodiment, in a preferred embodiment, the first pipeline is provided with a first stop valve 7-1 and a first pressure reducing valve 8-1, the first pressure reducing valve 8-1 is positioned at the downstream position of the first stop valve 7-1 and at the upstream position of the first reversing valve 9-1, and the connection point of the second branch and the first pipeline is positioned at the downstream position of the first pressure reducing valve 8-1 and at the upstream position of the first reversing valve 9-1; the second pipeline is provided with a second stop valve 7-2 and a second pressure reducing valve 8-2, the second pressure reducing valve 8-2 is positioned at the downstream position of the second stop valve 7-2 and at the upstream position of the second reversing valve 9-2, and the connecting point of the first branch and the second pipeline is positioned at the downstream position of the second reversing valve 9-2. The first stop valve 7-1 is used for controlling the on-off of the first pipeline, the first pressure reducing valve 8-1 can reduce the pressure of high-pressure gas in the control gas cylinder 1 to low-pressure gas meeting the requirement, the second stop valve 7-2 is used for controlling the on-off of the second pipeline, and the second pressure reducing valve 8-2 can reduce the pressure of high-pressure gas in the blowing gas cylinder 2 to low-pressure gas meeting the requirement. Typically, the inflation pressure is about 23MPa, and the pressure after decompression by a decompression valve is about 7 MPa. Specifically, the first stop valve 7-1 and the second stop valve 7-2 are manual valves.
On the basis of the above embodiment, in a preferred embodiment, the control and blowing system further comprises a charging port E1, the charging port E1 is suitable for being connected with a gas source, and the control gas cylinder 1 and the blowing gas cylinder 2 are connected with the same charging port E1. One inflation inlet E1 can inflate control gas cylinder 1 and blowdown gas cylinder 2 simultaneously, can improve and aerify efficiency, and will control gas cylinder 1, blowdown gas cylinder 2 integration, and is structural simpler.
On the basis of the above embodiment, in a preferred embodiment, the inflation inlet E1 is connected to an inflation main path, the control gas bottle 1 is communicated with the inflation main path through a first inflation branch, the blow-off gas bottle 2 is communicated with the inflation main path through a second inflation branch, the first inflation branch is provided with a first inflation check valve 5-1, and the second inflation branch is provided with a second inflation check valve 5-2. The first inflation one-way valve 5-1 and the second inflation one-way valve 5-2 can avoid reverse air leakage during inflation. The first inflation branch and the second inflation branch are connected with the inflation main path, so that when inflation is carried out, only one port on the inflation main path is connected with an air source, and the inflation main path is simpler in structure and convenient to operate. Of course, in other alternative embodiments, the main inflation path may not be provided, and the first inflation branch and the second inflation branch may be simultaneously communicated with the inflation port E1.
On the basis of the above embodiment, in a preferred embodiment, the first inflation branch is provided with a first orifice plate 4-1, and the second inflation branch is provided with a second orifice plate 4-2. The first throttle orifice plate 4-1 and the second throttle orifice plate 4-2 can limit the inflation flow, and the phenomenon that the gas cylinder exceeds the allowable temperature due to the excessively high inflation speed is avoided.
In addition to the above embodiments, in a preferred embodiment, the main inflation path is provided with a gas filter 3. The gas filter 3 can prevent impurities in the inflation gas from entering the gas cylinder to affect the working reliability.
On the basis of the above embodiment, in a preferred embodiment, the control gas cylinder 1 is further communicated with a first deflation valve 6-1, the blowdown gas cylinder 2 is communicated with a second deflation valve 6-2, the first deflation valve 6-1 is provided with a first deflation port E2, the second deflation valve 6-2 is provided with a second deflation port E3, when the first deflation valve 6-1 is opened, gas is discharged through the first deflation port E2, and when the second deflation valve 6-2 is opened, gas is discharged through the second deflation port E3. The arrangement of the first air release valve 6-1 and the second air release valve 6-2 can release the residual gas in the control gas cylinder 1 and the blowing gas cylinder 2 after the control and blowing system finishes working, thereby reducing the load of the rocket.
In one embodiment, the blow down solenoid valve set 10 includes a first blow down solenoid valve, a second blow down solenoid valve, a third blow down solenoid valve, and a fourth blow down solenoid valve. The first blowing electromagnetic valve is connected with a first blowing branch, and the first blowing branch is suitable for blowing the fuel cavity of the thrust chamber of the engine; the second blowing electromagnetic valve is connected with a second blowing branch, and the second blowing branch is suitable for blowing the oxygen cavity of the thrust chamber of the engine; the third blowing electromagnetic valve is connected with a third blowing branch, and the third blowing branch is suitable for blowing the fuel cavity of the engine generator; and the fourth blowing electromagnetic valve is connected with a fourth blowing branch, and the fourth blowing branch is suitable for blowing the oxygen cavity of the engine generator. The first blowing branch, the second blowing branch, the third blowing branch and the fourth blowing branch are all provided with blowing one-way valves 12.
In one embodiment, the controller is adapted to control the first blow-off solenoid valve, the second blow-off solenoid valve, the third blow-off solenoid valve, and the fourth blow-off solenoid valve to be opened in sequence when the engine performs the depth thrust adjustment. When the engine is used for deep thrust adjustment, the blowing gas can enter a fuel cavity of a thrust chamber of the engine, an oxygen cavity of the thrust chamber of the engine, a fuel cavity of a generator of the engine and an oxygen cavity of the generator of the engine, the propellant can be emulsified, and the pressure drop of an injector of the thrust chamber of the engine and the pressure drop of an injector of the generator are increased, so that the starting reliability of the engine is ensured, the combustion stability is improved, and the thrust adjustment range of the engine is expanded. The control controls the first blow-off solenoid valve, the second blow-off solenoid valve, the third blow-off solenoid valve, and the fourth blow-off solenoid valve to be opened in sequence, where the sequence refers to the operation in accordance with the rocket command.
When the control and blowing system works, firstly, the control gas cylinder 1 and the blowing gas cylinder 2 are inflated (nitrogen or helium) through the inflation inlet E1, the inflation pressure is about 23Mpa, and at the moment, the first stop valve 7-1, the second stop valve 7-2, the first deflation valve 6-1 and the second deflation valve 6-2 are all in a closed state. And after the inflation is finished, slowly opening the first stop valve 7-1 and the second stop valve 7-2, and finishing the preparation work before the normal work of the control and blowing system. The gas in the control gas bottle 1 is decompressed through a first decompression valve 8-1, the pressure of an outlet of the decompression valve is about 7Mpa, then the gas enters a first reversing valve 9-1, the gas finally enters a control electromagnetic valve group 11 through the first reversing valve 9-1, and the control of each air control valve of the engine is realized through the opening and closing of the electromagnetic valve group. At the moment, the first reversing valve 9-1 and the second reversing valve 9-2 are both in a closed state, the first reversing valve 9-1 and the second reversing valve 9-2 are in a normally open position, and gas entering the control electromagnetic valve group 11 comes from the control gas bottle 1. And the gas in the blowing gas bottle 2 passes through the second reversing valve 9-2, the blowing electromagnetic valve group 10 and the blowing one-way valve 12 and finally enters a fuel cavity and an oxygen cavity of the thrust chamber and a fuel cavity and an oxygen cavity of the generator respectively.
When the engine starts to work, the control electromagnetic valve group 11 performs opening and closing actions according to rocket instructions, and similarly, when the engine starts and shuts down, the blow-off electromagnetic valve group 10 performs opening and closing actions according to the rocket instructions to execute blow-off operation. Particularly, when the engine performs deep thrust adjustment, the blow-off electromagnetic valve group 10 is opened to blow off, the propellant is emulsified, the pressure drop of an injector of a thrust chamber of the engine and an injector of a generator is increased, the combustion stability is improved, and the thrust adjustment range of the engine is expanded.
When the section of the flow path from the gas cylinder 1 to the first pressure reducing valve 8-1 is controlled, after leakage occurs at a certain position due to a certain reason, the pressure in the gas cylinder 1 is controlled to be rapidly reduced, at the moment, the controller monitors that the pressure of the gas cylinder 1 is lower than a preset value through the first sensor, and then sends out an instruction for opening the first reversing electromagnetic valve 13-1, the first reversing valve 9-1 is reversed due to the existence of pressure difference, the gas blown off from the gas cylinder 2 enters the first reversing valve 9-1 and enters the control electromagnetic valve group 11, and the pneumatic valve of the engine can still be reliably controlled.
When the pressure in the blowing gas cylinder 2 is rapidly reduced after the pressure in a certain position leaks from the blowing gas cylinder 2 to the second pressure reducing valve 8-2 due to a certain reason, the controller monitors that the pressure in the blowing gas cylinder 2 is lower than a preset value through the second sensor, and then sends out an instruction for opening the second reversing electromagnetic valve 13-2, and the second reversing valve 9-2 is reversed due to the pressure difference, so that the gas in the gas cylinder 1 is controlled to enter the second reversing valve 9-2, enter the blowing electromagnetic valve group 10 and the blowing one-way valve 12, and finally enter a thrust chamber fuel cavity, an oxygen cavity, a generator fuel cavity and an oxygen cavity respectively.
In any case, when the control gas cylinder 1 and the blowing gas cylinder 2 need to be deflated, the first deflation valve 6-1 and the second deflation valve 6-2 can be opened manually for deflation.
Example 2
The embodiment provides a liquid rocket engine which comprises the control and blowing system provided in the embodiment.
Example 3
This embodiment provides a rocket including the liquid rocket engine provided in embodiment 2.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. A control, blowing system, comprising:
the pneumatic control system comprises a control gas cylinder (1), a control electromagnetic valve group (11) and a first pipeline for connecting the control gas cylinder (1) and the control electromagnetic valve group (11), wherein a first reversing valve (9-1) is arranged on the first pipeline;
the blowing system comprises a blowing gas cylinder (2), a blowing electromagnetic valve group (10) and a second pipeline which is connected with the blowing gas cylinder (2) and the blowing electromagnetic valve group (10), wherein a second reversing valve (9-2) is arranged on the second pipeline;
one end of the first branch is communicated with the second pipeline, and the other end of the first branch is connected with one end of the first reversing valve (9-1);
one end of the second branch is communicated with the first pipeline, and the other end of the second branch is connected with one end of the second reversing valve (9-2);
a first stop valve (7-1) and a first pressure reducing valve (8-1) are arranged on the first pipeline, the first pressure reducing valve (8-1) is positioned at the downstream position of the first stop valve (7-1) and at the upstream position of the first reversing valve (9-1), and the connection point of the second branch and the first pipeline is positioned at the downstream position of the first pressure reducing valve (8-1) and at the upstream position of the first reversing valve (9-1);
and a second stop valve (7-2) and a second pressure reducing valve (8-2) are arranged on the second pipeline, the second pressure reducing valve (8-2) is positioned at the downstream position of the second stop valve (7-2) and at the upstream position of the second reversing valve (9-2), and the connection point of the first branch and the second pipeline is positioned at the downstream position of the second reversing valve (9-2).
2. The control and blowing system according to claim 1, further comprising a controller, wherein a first reversing solenoid valve (13-1) is arranged on the first branch, a first sensor is arranged in the control gas cylinder (1), and the controller is configured to control the first reversing solenoid valve (13-1) to open when the gas pressure monitored by the first sensor is lower than a first preset gas pressure.
3. The control and blowing system according to claim 2, wherein a second reversing solenoid valve (13-2) is arranged on the second branch, a second sensor is arranged in the blowing gas cylinder (2), and the controller is used for controlling the second reversing solenoid valve (13-2) to be opened when the gas pressure detected by the second sensor is lower than a second preset gas pressure.
4. A control, blowing system according to any of the claims 1-3, characterised in that it further comprises a gas charging port (E1), said gas charging port (E1) being adapted to be connected to a gas source, said control gas cylinder (1), said blowing gas cylinder (2) being connected to the same gas charging port (E1).
5. The control and blowing system according to claim 4, characterized in that the inflation port (E1) is connected with a main inflation path, the control gas cylinder (1) is communicated with the main inflation path through a first inflation branch, the blowing gas cylinder (2) is communicated with the main inflation path through a second inflation branch, a first inflation one-way valve (5-1) is arranged on the first inflation branch, and a second inflation one-way valve (5-2) is arranged on the second inflation branch.
6. The control and blowing system according to claim 5, characterized in that a first orifice (4-1) is provided on the first inflation branch, and a second orifice (4-2) is provided on the second inflation branch.
7. A control and blowing system according to claim 5, characterised in that the main inflation circuit is provided with a gas filter (3).
8. The control and blowing system according to claim 4, characterized in that the control cylinder (1) is also connected with a first air release valve (6-1), and the blowing cylinder (2) is connected with a second air release valve (6-2).
9. Control, blow-off system according to any of claims 2-3, 5-8, characterized in that the blow-off solenoid valve group (10) comprises:
the first blowing electromagnetic valve is connected with a first blowing branch, and the first blowing branch is suitable for blowing the fuel cavity of the thrust chamber of the engine;
the second blowing electromagnetic valve is connected with a second blowing branch, and the second blowing branch is suitable for blowing the oxygen cavity of the thrust chamber of the engine;
the third blowing electromagnetic valve is connected with a third blowing branch, and the third blowing branch is suitable for blowing the fuel cavity of the engine generator;
the fourth blowing electromagnetic valve is connected with a fourth blowing branch, and the fourth blowing branch is suitable for blowing the oxygen cavity of the engine generator;
the controller is suitable for controlling the first blow-off electromagnetic valve, the second blow-off electromagnetic valve, the third blow-off electromagnetic valve and the fourth blow-off electromagnetic valve to be opened in sequence when the engine performs depth thrust adjustment.
10. A liquid rocket engine comprising the control, blow-off system of any one of claims 1-9.
11. A rocket comprising the liquid rocket engine of claim 10.
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| CN202010714800.5A CN111810320B (en) | 2020-07-22 | 2020-07-22 | Control and blowing system, liquid rocket engine and rocket |
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| CN202010714800.5A CN111810320B (en) | 2020-07-22 | 2020-07-22 | Control and blowing system, liquid rocket engine and rocket |
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| CN111810320B true CN111810320B (en) | 2021-04-13 |
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| CN112576411B (en) * | 2020-12-11 | 2021-11-02 | 西安航天动力研究所 | Liquid rocket engine emission blowing treatment device and method |
| CN113002808A (en) * | 2021-02-07 | 2021-06-22 | 上海宇航系统工程研究所 | Rocket blowing centralized gas supply system |
| CN113188379A (en) * | 2021-05-14 | 2021-07-30 | 北京宇航系统工程研究所 | Low-temperature carrier rocket cabin section environment temperature control gas blowing system |
| CN114776479B (en) * | 2022-05-20 | 2023-04-28 | 西北工业大学 | Nitrous oxide kerosene bi-component liquid rocket engine power system |
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| US3364958A (en) * | 1965-06-28 | 1968-01-23 | Calumet & Hecla | Method of and structure for pressurizing tube sections |
| JP3574965B2 (en) * | 1999-07-13 | 2004-10-06 | 日本酸素株式会社 | Gas supply device and gas replacement method |
| US10648621B2 (en) * | 2017-07-26 | 2020-05-12 | John B. King | Trapped gas transfer and metering system |
| CN208123881U (en) * | 2018-03-07 | 2018-11-20 | 上海兄弟微电子技术有限公司 | A kind of laboratory automatic switching control equipment |
| CN210509425U (en) * | 2019-07-09 | 2020-05-12 | 陕西蓝箭航天技术有限公司 | Propellant supply system suitable for wide mission profile and carrier rocket |
| CN210716947U (en) * | 2019-09-11 | 2020-06-09 | 上海盛韬半导体科技有限公司 | Steel cylinder frame for conveying special gas |
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Address after: 100045 1-14-214, 2nd floor, 136 Xiwai street, Xicheng District, Beijing Applicant after: Beijing Star glory Space Technology Co.,Ltd. Applicant after: Beijing Star glory Technology Co.,Ltd. Applicant after: Beijing Star smart Manufacturing Technology Co.,Ltd. Address before: 329, floor 3, building 1, No. 9, Desheng South Street, Daxing Economic and Technological Development Zone, Beijing 100176 Applicant before: BEIJING XINGJIRONGYAO SPACE TECHNOLOGY Co.,Ltd. Applicant before: Beijing Star glory Technology Co.,Ltd. Applicant before: Beijing Star smart Manufacturing Technology Co.,Ltd. |
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Denomination of invention: The utility model relates to a control and blowing system, a liquid rocket engine and a rocket Effective date of registration: 20220309 Granted publication date: 20210413 Pledgee: Beijing finance Company limited by guarantee Pledgor: Beijing Star glory Space Technology Co.,Ltd.|Beijing Star glory Technology Co.,Ltd.|Beijing Star smart Manufacturing Technology Co.,Ltd. Registration number: Y2022990000137 |
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