Combination valve for cold air propulsion and cold air propulsion system

Abstract

The embodiment of the utility model relates to the technical field of space propulsion, and discloses a combination valve for cold air propulsion and a cold air propulsion system. The combination valve for cold air propulsion comprises a combination valve module shell, a first ventilation path and a second ventilation path are arranged in the combination valve module shell, the two ends of the first ventilation path penetrate through the combination valve module shell, one end of the first ventilation path is provided with an input connector, and the other end of the first ventilation path is provided with an output connector; an electromagnetic valve assembly is arranged on the first ventilation path, the electromagnetic valve assembly controls connection and disconnection of the first ventilation path, and a pressure reducing valve is further arranged on the first ventilation path. The embodiment of the utility model further provides a cold air propelling system. The cold air propelling system comprises the combination valve for cold air propelling. According to the embodiment of the invention, the integrated structural layout is realized through the integrated design and the plug-in valve design, and the locking stability, the sealing performance and the safety of the whole system are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of space propulsion technology, and in particular to a combined valve for cold gas propulsion and a cold gas propulsion system. Background Art

[0002] Space propulsion technology is a technology that converts energy such as chemical energy and electrical energy into the jet kinetic energy of propellants, and is mainly applied to spacecraft orbital maneuvering position keeping, attitude control, and momentum wheel unloading, etc. Space propulsion technology plays an important role in manned spaceflight, artificial satellites, launch vehicles, deep space probes, defense systems, etc. Space propulsion ensures the reliable implementation of the manned spaceflight project, realizes the long-term on-orbit operation of artificial satellites, ensures the accurate orbital injection of launch vehicles, helps detectors to navigate in interstellar space, and space propulsion enhances the high-efficiency maneuverability of defense systems.

[0003] In recent years, with the popularization of small satellites and CubeSats, the cold gas propulsion system has become the preferred propulsion method for these satellites to perform orbit adjustment and attitude control due to its lightweight and low-cost characteristics. Due to the limited mass, volume, and power of small satellites, their wide application has put forward higher requirements for space power. Space power devices with small thrust, high specific impulse, light weight, and small volume are more capable of matching the power requirements of small satellites. Compared with traditional chemical propulsion and electric propulsion, the cold gas propulsion system has low cost, simple structure, and high safety. Although its specific impulse is lower than that of electric propulsion, it performs particularly well in precise control and is currently widely used in the orbit control tasks of small satellites. Satellites such as Tiandu-2, Magic Cube-2, and Yunyao-1 have all adopted cold gas propulsion technology as the orbit-changing power of the satellites.

[0004] Cold gas propulsion uses "cold gas" such as nitrogen and helium as the working medium to generate thrust by releasing the gas in the storage tank. The propulsion system usually consists of a gas storage tank, a valve, and a nozzle, and has a relatively simple structure; the gas used is generally an inert gas, such as nitrogen or argon, which is not easy to burn or explode; compressed gas propulsion can provide very precise thrust and is suitable for performing orbit adjustment and attitude control of small satellites. Phase change gas usually has a higher specific impulse because the energy released by the gas during the phase change process can increase the specific impulse and thrust; compared with compressed gas propulsion, phase change gas propulsion can use the energy of the propellant more effectively.

[0005] Traditional cold gas propulsion systems usually include single-function components such as an inflation valve, a gas cylinder, a self-locking valve, a pressure reducing valve, and a cold gas engine, and these components are connected by conduits. And in order to meet the smooth release of pressure, a multi-stage pressure reducing structure is usually required, which adds an additional burden to the cost, volume, and design structure and cannot meet the development needs of satellite Internet and satellite constellations. The propulsion system constructed by single-function components occupies a large space size, has a complex pipeline structure, and a high production cost. Utility Model Content

[0006] In the current cold gas propulsion system, the components are connected through ducts, which easily leads to a complex pipeline structure, a relatively large occupied space size, poor locking stability, and high production costs.

[0007] To solve the above problems, an object of the embodiments of the present application is to provide a combined valve for cold gas propulsion, which includes:

[0008] A combined valve module housing, in which a first ventilation path and a second ventilation path are provided. Both ends of the first ventilation path penetrate through the combined valve module housing. An input interface is provided at one end of the first ventilation path, and an output interface is provided at the other end of the first ventilation path. One end of the second ventilation path is communicated with the first ventilation path, and an inflation valve is provided at the other end of the second ventilation path. An electromagnetic valve assembly is provided on the first ventilation path, and the electromagnetic valve assembly controls the connection and blockage of the first ventilation path. A pressure reducing valve is also provided on the first ventilation path.

[0009] An embodiment of the present application also provides a cold gas propulsion system, which includes the above-mentioned combined valve for cold gas propulsion.

[0010] An object of the embodiments of the present application is to provide a combined valve for cold gas propulsion and a cold gas propulsion system. Through an integrated design, the number of individual components used is reduced, and an overall structural layout is achieved through an insert valve design, improving the locking stability, sealing performance, and safety of the entire system, and also reducing the production cost.

[0011] In some embodiments, one end of the second ventilation path is communicated with the first ventilation path between the electromagnetic valve assembly and the input interface.

[0012] In some embodiments, a third ventilation path is further provided in the combined valve module housing. One end of the third ventilation path is communicated with the first ventilation path, and a pressure sensor is provided at the other end of the third ventilation path.

[0013] In some embodiments, one end of the third ventilation path is communicated with the first ventilation path between the electromagnetic valve assembly and the input interface.

[0014] In some embodiments, the electromagnetic valve assembly includes a first electromagnetic valve and a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are arranged in sequence along the air flow direction in the first ventilation path.

[0015] In some embodiments, when both the first electromagnetic valve and the second electromagnetic valve are in the open state, the first ventilation path is in the connected state; when at least one of the first electromagnetic valve and the second electromagnetic valve is in the closed state, the first ventilation path is in the blocked state.

[0016] In some embodiments, the cold gas propulsion system includes a gas cylinder, and the bottle mouth of the gas cylinder is connected to the input interface.

[0017] In some embodiments, a fixing bracket is provided on the outer surface of the gas cylinder, and the fixing bracket is used for external fixing of the gas cylinder.

[0018] In some embodiments, the cold gas propulsion system further includes a conduit and a nozzle. One end of the conduit is connected to the output interface, and the other end of the conduit is connected to the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0020] Figure 1 is the front view of the combined valve for cold gas propulsion provided by some embodiments of the present application;

[0021] Figure 2 is the left view of the combined valve for cold gas propulsion provided by some embodiments of the present application;

[0022] Figure 3 is the sectional view of the housing of the combined valve module provided by some embodiments of the present application;

[0023] Figure 4 is the sectional view of the housing of the combined valve module in the A-A direction provided by some embodiments of the present application;

[0024] Figure 5 is the sectional view of the housing of the combined valve module in the B-B direction provided by some embodiments of the present application;

[0025] Figure 6 is the front view of the cold gas propulsion system provided by some embodiments of the present application;

[0026] Figure 7 is the left view of the cold gas propulsion system provided by some embodiments of the present application;

[0027] Figure 8 is the top view of the cold gas propulsion system provided by some embodiments of the present application;

[0028] Figure 9 is the schematic diagram of the cold gas propulsion system provided by some embodiments of the present application.

[0029] Description of the reference numerals: 11. Combined valve module housing; 111. First ventilation passage; 112. Second ventilation passage; 113. Third ventilation passage; 114. Input interface; 115. Output interface; 116. First placement cavity; 117. Second placement cavity; 118. Connecting ventilation passage; 119. Third placement cavity; 1110. Fourth placement cavity; 12. Pressure reducing valve; 121. Pressure reducing ventilation passage; 13. Pressure sensor; 14. Solenoid valve assembly; 141. First solenoid valve; 142. Second solenoid valve; 15. Inflation valve; 16. Gas cylinder; 17. Fixing bracket; 18. Conduit; 19. Nozzle. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will elaborate on the various implementation manners of the present application with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the various implementation manners of the present application, many technical details are provided for the readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation manners, the technical solutions claimed in the present application can still be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation to the specific implementation manners of the present application. The various embodiments can be combined and cross-referenced with each other on the premise of not being contradictory.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0034] Reference Figures 1 to 9 , the embodiments of the present application provide the following technical solutions:

[0035] As Figures 1 to 2 shown, the combined valve for cold gas propulsion includes a combined valve module housing 11. A pressure sensor 13 is fixedly connected to the upper end of the combined valve module housing 11. The solenoid valve assembly 14 includes a first solenoid valve 141 and a second solenoid valve 142. The first solenoid valve 141 and the second solenoid valve 142 are symmetrically and fixedly connected to the lower side of the combined valve module housing 11 front and back. An inflation valve 15 is fixedly connected to the lower side of the left end of the combined valve module housing 11. An output interface 115 is provided on the combined valve module housing 11.

[0036] As Figures 3 to 5 shown, an input interface 114 communicating with the inside of the combined valve module housing 11 is provided on the outer surface of the combined valve module housing 11. A communication gas path 118, a second ventilation path 112, and a third ventilation path 113 are provided inside the combined valve module housing 11. The port of the communication gas path 118 communicating with the input interface 114 is the input end of the communication gas path 118. One ends of the second ventilation path 112 and the third ventilation path 113 are both communicated with the input end of the communication gas path 118. The other end of the second ventilation path 112 is provided with a first placement cavity 116. The first placement cavity 116 extends to the outer surface of the combined valve module housing 11. The inflation valve 15 is inserted and fixed in the first placement cavity 116. The other end of the third ventilation path 113 is provided with a second placement cavity 117. The second placement cavity 117 extends to the outer surface of the combined valve module housing 11. The pressure sensor 13 is inserted and fixed in the second placement cavity 117.

[0037] Third placement cavities 119 and fourth placement cavities 1110 are symmetrically arranged on the lower side of the combined valve module housing 11. Both the third placement cavities 119 and the fourth placement cavities 1110 extend to the outer surface of the combined valve module housing 11. The communication gas path 118 unidirectionally communicates the third placement cavities 119 and the fourth placement cavities 1110. The first solenoid valve 141 is inserted and fixed in the third placement cavity 119. The second solenoid valve 142 is inserted and fixed in the fourth placement cavity.

[0038] Another port of the communication gas path 118 is provided with an output interface 115. The output interface 115 is fixedly connected to the combined valve module housing 11 by a thread. A cavity is formed between the output interface 115 and the combined valve module housing 11. A pressure reducing valve 12 is arranged in the cavity between the output interface 115 and the combined valve module housing 11. The pressure reducing valve 12 is connected to the combined valve module housing 11 by a spring. A pressure reducing gas path 121 is provided on the pressure reducing valve 12. The pressure reducing gas path 121 penetrates through the pressure increasing valve 12.

[0039] The input interface 114, the connecting air passage 118, the pressure reducing air passage 121, and the output interface 115 are connected in sequence to form a first air passage 111. When both the first solenoid valve 141 and the second solenoid valve 142 are in the open state, the connecting air passage 118 is in the air-permeable state, and at this time, the first air passage 111 is in the connected state;

[0040] When both the first solenoid valve 141 and the second solenoid valve 142 are in the closed state or one of the first solenoid valve 141 and the second solenoid valve 142 is in the closed state, the connecting air passage 118 is in the air-cutoff state, and at this time, the first air passage 111 is in the blocked state.

[0041] As Figures 6 to 9 shown, some embodiments of the present application further provide a cold gas propulsion system. The cold gas propulsion system includes the above-mentioned combined valve for cold gas propulsion. The input interface 114 is fixedly connected and communicated with the bottle mouth of the gas cylinder 16. A fixing frame 17 is arranged on the outer surface of the gas cylinder 16. The output interface 115 is fixedly connected and communicated with one end of the conduit 18, and the other end of the conduit 18 is fixedly connected and communicated with the nozzle 19.

[0042] It should be noted that: Figure 4 the sectional view of the combined valve module housing in the A-A direction and Figure 5 the sectional view of the combined valve module housing in the B-B direction are as shown in the Figure 3 annotation.

[0043] It should be noted that: As Figure 9 shown, when the cold gas propulsion system is in the working state, it has an inflation stroke and a deflation stroke;

[0044] When the cold gas propulsion system performs the inflation stroke, the first solenoid valve 141 and the second solenoid valve 142 are simultaneously closed or the first solenoid valve 141 or the second solenoid valve 142 is separately closed. At this time, the first air passage 111 is in the blocked state. The inflation valve 15 is connected to an external gas source device. The cold gas in the external gas source device enters the second air passage 112 through the inflation valve 15, the cold gas enters the input interface 114 through the second air passage 112, and enters the gas cylinder 16 through the input interface 114 to inflate the gas cylinder 16;

[0045] When the cold gas propulsion system performs the air bleeding stroke, the first solenoid valve 141 and the second solenoid valve 142 are opened simultaneously. At this time, the first ventilation path 111 is in a connected state. The gas cylinder 16 serves as the gas source at this time. The cold gas in the gas cylinder 16 enters the connected gas path 118 through the input interface 114. The cold gas in the connected gas path 118 flows out of the connected gas path 118 through the first solenoid valve 141 and the second solenoid valve 142 in sequence. Subsequently, the cold gas is decompressed by the pressure reducing valve 12 and enters the output interface 115 through the decompression gas path 121. The cold gas entering the output interface 115 passes through the conduit 18 and is finally ejected through the nozzle 19 to generate a constant thrust.

[0046] It should be noted that: The above gas cylinder 16 is pre-charged with 40 MPa high-pressure nitrogen. When the cold gas propulsion system is in a non-working state, both the first solenoid valve 141 and the second solenoid valve 142 are in a closed state.

[0047] It should be noted that: The cold gas propulsion system is equipped with a central management unit to control the opening or closing of the first solenoid valve 141 and the second solenoid valve 142. By controlling the opening or closing of the first solenoid valve 141 and the second solenoid valve 142, the working state of the cold gas propulsion system is further controlled.

[0048] It should be noted that: The pressure sensor 13 is used to monitor the inflation pressure during the inflation stroke and the deflation pressure during the deflation stroke when the cold gas propulsion system is working, as well as the gas pressure in the gas cylinder 16 when it is in a non-working state.

[0049] When the cold gas propulsion system is in a working state and performs the inflation stroke, the cold gas will enter the third ventilation path 113 simultaneously after passing through the second ventilation path 112. Subsequently, the gas pressures in the second ventilation path 112, the third ventilation path 113, and the gas cylinder 16 are the same;

[0050] When the cold gas propulsion system is in a working state and performs the deflation stroke, the cold gas enters the first ventilation path 111 from the gas cylinder 16. At the same time, the cold gas also enters the third ventilation path 113. The second ventilation path 112 is in a blocked state under the action of the inflation valve 15. At this time, the gas pressures in the first ventilation path 111 and the third ventilation path 113 are the same;

[0051] When the cold gas propulsion system is in a non-working state, the first ventilation path 111 is in a blocked state under the action of the first solenoid valve 141 and the second solenoid valve 142. The second ventilation path 112 is in a blocked state under the action of the inflation valve 15. At this time, the gas pressures in the third ventilation path 113 and the gas cylinder 16 are the same.

[0052] It should be noted that: The inflation valve 15 has a one-way valve structure, and the opening of the inflation valve 15 is controlled by an external gas source device on the ground.

[0053] It should be noted that: The fixing bracket 17 is used for the external fixation of the gas cylinder 16.

[0054] It should be noted that: all the joints between the components included in the cold gas propulsion combined valve and the cold gas propulsion system are sealed, and the sealing treatment includes but is not limited to sealing rubber rings and welded seals.

[0055] Through an integrated design, the cold gas propulsion combined valve and the cold gas propulsion system use the combined valve module housing 11 to reduce the number of independent components, and achieve an overall structural layout through an inserted valve design, release the redundant functions of the pressure reducing valve 12, reduce the overall volume, the first solenoid valve 141 and the second solenoid valve 142 are both arranged upstream of the pressure reducing valve 12, relieve the constraint that the pressure reducing valve 12 needs to bear the locking function, eliminate the failure points of the system, improve the locking stability, sealing performance and safety of the whole system, and also reduce the production cost.

[0056] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A combined valve for cold gas propulsion, characterized in that It includes a combined valve module housing, in which a first ventilation passage and a second ventilation passage are provided. Both ends of the first ventilation passage penetrate through the combined valve module housing. An input interface is provided at one end of the first ventilation passage, and an output interface is provided at the other end of the first ventilation passage. One end of the second ventilation passage is communicated with the first ventilation passage, and an inflation valve is provided at the other end of the second ventilation passage. An electromagnetic valve assembly is provided on the first ventilation passage, and the electromagnetic valve assembly controls the connection and blockage of the first ventilation passage. A pressure reducing valve is also provided on the first ventilation passage.

2. The combined valve for cold gas propulsion according to claim 1, wherein, One end of the second ventilation passage is communicated with the first ventilation passage between the electromagnetic valve assembly and the input interface.

3. The combined valve for cold gas propulsion according to claim 1, characterized in that, A third ventilation passage is also provided in the combined valve module housing. One end of the third ventilation passage is communicated with the first ventilation passage, and a pressure sensor is provided at the other end of the third ventilation passage.

4. The combined valve for cold gas propulsion according to claim 3, characterized in that, One end of the third ventilation passage is communicated with the first ventilation passage between the electromagnetic valve assembly and the input interface.

5. The combined valve for cold gas propulsion according to claim 1, characterized in that, The electromagnetic valve assembly includes a first electromagnetic valve and a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are arranged in sequence along the air flow direction in the first ventilation passage.

6. The combined valve for cold gas propulsion according to claim 5, characterized in that When both the first electromagnetic valve and the second electromagnetic valve are in the open state, the first ventilation passage is in the connected state; When at least one of the first electromagnetic valve and the second electromagnetic valve is in the closed state, the first ventilation passage is in the blocked state.

7. A cold gas propulsion system, characterized in that, It includes the combined valve for cold gas propulsion according to any one of claims 1 to 6.

8. A cold gas propulsion system according to claim 7, characterized in that, The cold gas propulsion system includes a gas cylinder, and the mouth of the gas cylinder is connected to the input interface.

9. A cold gas propulsion system according to claim 8, wherein A fixing bracket is provided on the outer surface of the gas cylinder, and the fixing bracket is used for external fixation of the gas cylinder.

10. A cold gas propulsion system according to claim 7, characterized in that, The cold gas propulsion system further includes a conduit and a nozzle. One end of the conduit is connected to the output interface, and the other end of the conduit is connected to the nozzle.

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