Air pressure regulating device, cold air micro-propulsion system and satellite

Abstract

The application provides a gas pressure regulating device, a cold gas micro-propulsion system and a satellite, and relates to the technical field of cold gas micro-propulsion. The gas pressure regulating device comprises a high-pressure valve, a two-stage pressure reducing valve, a precision pressure regulating valve, a buffer gas cylinder and a pressure sensor. One end of the high-pressure valve is connected with a high-pressure gas cylinder, and the other end of the high-pressure valve is connected with the two-stage pressure reducing valve through a first pipeline. The precision pressure regulating valve is provided with a first interface, a second interface, a third interface and a fourth interface. The first interface is connected with the two-stage pressure reducing valve through a second pipeline, the second interface is connected with the pressure sensor through a third pipeline, the third interface is connected with the buffer gas cylinder through a fourth pipeline, and the fourth interface is connected with a thruster. Compared with the prior art, the gas pressure regulating device adopts a combination of two-stage pressure reduction, gas capacity buffering and gas pressure closed-loop precision regulation, can supply stable and low-noise gas to the thruster, and thus realizes high-stability and low-noise thrust output.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold gas micro-propulsion, in particular to a gas pressure regulating device, a cold gas micro-propulsion system and a satellite. BACKGROUND

[0002] Gravitational waves are a kind of matter waves generated by the violent movement and change of matter and energy. Gravitational waves provide a new important window for observing the universe different from electromagnetic waves, and become a new important way and means for human beings to explore and understand the unknown world. Among them, the detection of gravitational waves is usually realized by a gravitational wave detection satellite.

[0003] The cold gas micro-propulsion system is an important part of the gravitational wave detection satellite. In the cold gas micro-propulsion system, cold gas is generally stored in a gas cylinder in the form of high pressure. When working, the cold gas pressure is first reduced to the required pressure by the gas pressure regulating device, and then the cold gas is delivered to the cold gas micro-thruster nozzle, thereby providing the required thrust for the satellite. The gas pressure output by the gas pressure regulating device, stability, etc. are closely related to the thrust accuracy.

[0004] However, the scientific exploration of gravitational waves needs to use micro-newton level thrust with high stability and low noise and higher thrust resolution, which puts very high requirements on the output stability and noise of the gas pressure regulating device. However, the traditional pressure control system does not have special requirements for the noise control of the pressure. For the high-precision, high-stability micro-newton level thrust and higher thrust resolution required by the gravitational wave detection, it cannot meet the use requirements. SUMMARY

[0005] The problem to be solved by the present application is how to realize high-stability, low-noise thrust output.

[0006] The application provides a gas pressure regulating device, comprising a high-pressure valve, a two-stage pressure reducing valve, a precision pressure regulating valve, a buffer gas cylinder and a pressure sensor; one end of the high-pressure valve is used for being connected with a high-pressure gas cylinder, and the other end of the high-pressure valve is connected with the two-stage pressure reducing valve through a first pipeline; the precision pressure regulating valve is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is connected with the two-stage pressure reducing valve through a second pipeline, the second interface is connected with the pressure sensor through a third pipeline, the third interface is connected with the buffer gas cylinder through a fourth pipeline, and the fourth interface is used for being connected with a thruster; the precision pressure regulating valve comprises a base, a tail cover and a valve seat, the tail cover is connected with the base and jointly forms a closed cavity; the base is provided with a groove in communication with the closed cavity, the valve seat is arranged in the groove, and the valve seat is provided with a gas outlet; the inside of the base is provided with a four-way channel, the four-way channel is in communication with the gas outlet, the second interface, the third interface and the fourth interface respectively, and the first interface is in communication with the closed cavity; the closed cavity is provided with a piezoelectric ceramic driving module and a valve core, the valve core is arranged in the piezoelectric ceramic driving module, and the valve core is used for being in contact with the gas outlet, and the piezoelectric ceramic driving module is used for being electrified to drive the valve core to move, so that the opening degree of the gas outlet is changed.

[0007] The gas pressure regulating device provided by the application has the following beneficial effects, but is not limited to the following:

[0008] The gas pressure regulating device has the following advantages: when the device is working, the high-pressure valve can be opened by an external control system, high-pressure gas flows into the device from a high-pressure cylinder through a pipeline, and then reaches a two-stage pressure reducing valve after passing through a first pipeline, the high-pressure gas can be reduced to the required pressure by the two-stage pressure reducing valve, and then enters a precision pressure regulating valve through a second pipeline for precise regulation of the gas pressure, the adjusted gas pressure is transmitted to a pressure sensor through a third pipeline, the control system adjusts the gas pressure in a closed loop according to the measurement result of the pressure sensor, and the outlet of a buffer cylinder is connected to the precision pressure regulating valve through a fourth pipeline, which mainly provides a buffer time for the gas pressure regulation and realizes high-stability and low-noise output of the gas pressure, and finally the high-stability and low-noise gas can be output from the fourth interface of the precision pressure regulating valve and filled into the front end of the thruster nozzle, and the thrust output can be realized according to the instruction of the control system. Compared with the related art, the gas pressure regulating device adopts a combination of two-stage pressure reduction, gas capacity buffering and closed-loop precise regulation of the gas pressure, the high-pressure cold gas output by the cylinder is gradually reduced to the required nominal pressure by the two-stage pressure reducing device, the buffer cylinder is used to provide a buffer time for the regulation and stabilization of the gas pressure, and finally the control system adjusts and stabilizes the output of the gas pressure according to the gas pressure measurement value of the pressure sensor, so that stable and low-noise gas is supplied to the thruster, thereby realizing high-stability and low-noise thrust output.

[0009] Optionally, the precision pressure regulating valve comprises a base, a tail cover and a valve seat, the tail cover is connected with the base and jointly forms a closed cavity, a groove is formed in the base and communicates with the closed cavity, the valve seat is arranged in the groove, and the valve seat has a gas outlet communicating with the closed cavity, a four-way channel is arranged in the base, the four-way channel communicates with the gas outlet, the second interface, the third interface and the fourth interface respectively, and the first interface communicates with the closed cavity, a piezoelectric ceramic driving module and a valve core are arranged in the closed cavity, the valve core penetrates through the piezoelectric ceramic driving module, and one end of the valve core is used for abutting against the gas outlet, and the piezoelectric ceramic driving module is used for being electrified to drive the valve core to move, so as to change the opening degree of the gas outlet.

[0010] Optionally, the precision pressure regulating valve further comprises a fixing seat, a supporting seat, a first pressing seat and a spring, the fixing seat is threadedly connected with the base, the fixing seat is located in the closed cavity, the piezoelectric ceramic driving module is arranged on the fixing seat, the supporting seat is connected to one end of the fixing seat away from the base, the first pressing seat is threadedly connected to the middle position of the supporting seat, the spring is sleeved on the valve core, one end of the spring abuts against the first pressing seat, and the other end of the spring abuts against a shoulder on the valve core, and the valve core is used for closing the gas outlet under the elastic force of the spring.

[0011] Optionally, the precision pressure regulating valve further comprises a second pressing seat, the second pressing seat is threadedly connected to the groove, and the second pressing seat is used for abutting against the valve seat, and the valve core is used for penetrating through the second pressing seat.

[0012] Optionally, the precision pressure regulating valve further comprises a high-pressure sealing connector, the high-pressure sealing connector is arranged on the tail cover, wherein the high-pressure sealing connector is partially located in the closed cavity and partially located outside the closed cavity, and the high-pressure sealing connector is electrically connected between the piezoelectric ceramic driving module.

[0013] Optionally, the gas pressure regulating device further comprises a mounting plate, the high-pressure valve, the two-stage pressure reducing valve, the precision pressure regulating valve, the buffer gas cylinder and the pressure sensor are arranged on the mounting plate, and the mounting plate is used for being connected with a satellite main body.

[0014] Optionally, the gas pressure regulating device further comprises a pipeline filter, the pipeline filter is arranged on the mounting plate, the second pipeline comprises a first pipe and a second pipe, one end of the pipeline filter and the first interface are connected through the first pipe, and the other end of the pipeline filter and the two-stage pressure reducing valve are connected through the second pipe.

[0015] Optionally, the two-stage pressure reducing valve comprises a high-pressure pressure reducing valve and a low-pressure pressure reducing valve, the high-pressure pressure reducing valve is connected with the first pipeline, and the low-pressure pressure reducing valve is connected with the second pipeline.

[0016] In addition, the present application also provides a cold gas micro-propulsion system, comprising a high-pressure gas cylinder, a thruster and the gas pressure regulating device as described above.

[0017] Since the technical improvement and the technical effects of the cold gas micro-propulsion system are the same as those of the gas pressure regulating device, the technical effects of the cold gas micro-propulsion system will not be described in detail.

[0018] In addition, the present application also provides a satellite, comprising the cold gas micro-propulsion system as described above.

[0019] Since the technical improvement and the technical effects of the satellite are the same as those of the cold gas micro-propulsion system, the technical effects of the satellite will not be described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a top view of the gas pressure regulating device of the embodiment of the present application;

[0021] Figure 2 is a side view of the gas pressure regulating device of the embodiment of the present application;

[0022] Figure 3A sectional view of a precision pressure regulating valve according to an embodiment of the present application.

[0023] Explanation of reference numerals:

[0024] 1, high pressure valve; 2, two-stage pressure reducing valve; 3, precision pressure regulating valve; 301, first interface; 302, second interface; 303, third interface; 304, fourth interface; 305, base; 306, tail cover; 307, valve seat; 308, four-way passage; 309, piezoelectric ceramic driving module; 310, valve core; 311, fixed seat; 312, support seat; 313, first pressing seat; 314, spring; 315, second pressing seat; 316, filter element; 317, high pressure sealing connector; 4, buffer gas cylinder; 5, pressure sensor; 6, first pipeline; 7, second pipeline; 701, first pipe fitting; 702, second pipe fitting; 8, third pipeline; 9, fourth pipeline; 10, mounting plate; 11, pipeline filter; 12, support; 1201, upper body; 1202, lower body; 13, arc-shaped seat. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] In the description of the present application, the orientations or positional relationships indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the description of the specification, the description of the terms "embodiment", "one embodiment", and "one implementation" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or implementation are included in at least one embodiment or implementation of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0029] Moreover, the Z-axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis represents up and the negative direction of the Z-axis represents down.

[0030] It should be noted that the aforementioned meaning of the Z-axis is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] As shown in Figures 1 to 2 The air pressure regulating device of the embodiment of the present application comprises a high-pressure valve 1, a two-stage pressure reducing valve 2, a precision pressure regulating valve 3, a buffer gas cylinder 4, and a pressure sensor 5. One end of the high-pressure valve 1 is used to be connected with a high-pressure gas cylinder, and the other end of the high-pressure valve 1 is connected with the two-stage pressure reducing valve 2 through a first pipeline 6. The precision pressure regulating valve 3 has a first interface 301, a second interface 302, a third interface 303, and a fourth interface 304. The first interface 301 is connected with the two-stage pressure reducing valve 2 through a second pipeline 7, the second interface 302 is connected with the pressure sensor 5 through a third pipeline 8, the third interface 303 is connected with the buffer gas cylinder 4 through a fourth pipeline 9, and the fourth interface 304 is used to be connected with a thruster.

[0032] In this embodiment, the drawings are combined Figure 1As shown, in operation, the device can be powered on by an external control system to open the high-pressure valve 1, so that the high-pressure gas flows into the pipeline inlet from the high-pressure gas cylinder, then passes through the first pipeline 6 to the two-stage pressure reducing valve 2, and the high-pressure gas can be reduced to the required pressure through the two-stage pressure reducing valve 2, then enters the precision pressure regulating valve 3 through the second pipeline 7 for precise adjustment of the gas pressure, and the adjusted gas pressure is transmitted to the pressure sensor 5 through the third pipeline 8, and the control system adjusts the gas pressure in a closed loop according to the measurement result of the pressure sensor 5, and the buffer gas cylinder 4 is connected to the precision pressure regulating valve 3 through the fourth pipeline 9, which mainly provides a buffer time for gas pressure adjustment, for example, when the outlet flow demand at the fourth interface 304 increases, the buffer gas cylinder 4 can compensate the outflowing gas, and when the outlet flow demand at the fourth interface 304 decreases, the buffer gas cylinder 4 can compensate the inflowing gas, so as to realize high-stability and low-noise output of the gas pressure, and finally the high-stability and low-noise gas can be output from the fourth interface 304 of the precision pressure regulating valve 3 and filled into the front end of the thruster nozzle, and the thrust output can be realized according to the instruction of the control system.

[0033] Compared with the related art, the gas pressure regulating device adopts a combination of two-stage pressure reduction, gas capacity buffering and closed-loop precise regulation of gas pressure, first reduces the high-pressure cold gas output by the gas cylinder to the required nominal pressure through the two-stage pressure reducing device, then uses the buffer gas cylinder to provide a buffer time for the adjustment and stabilization of the gas pressure, and finally the control system adjusts and stabilizes the output of the gas pressure according to the gas pressure measurement value of the pressure sensor, so as to supply the stable and low-noise gas to the thruster, thereby realizing high-stability and low-noise thrust output.

[0034] Optionally, the precision pressure regulating valve 3 comprises a base 305, a tail cover 306 and a valve seat 307, the tail cover 306 is connected with the base 305 and jointly forms a closed cavity, a groove communicating with the closed cavity is formed in the base 305, the valve seat 307 is arranged in the groove, and the valve seat 307 has a gas outlet communicating with the closed cavity, a four-way channel 308 is arranged in the inside of the base 305, the four-way channel 308 respectively communicates with the gas outlet, the second interface 302, the third interface 303 and the fourth interface 304, and the first interface 301 communicates with the closed cavity, a piezoelectric ceramic driving module 309 and a valve core 310 are arranged in the closed cavity, the valve core 310 penetrates through the piezoelectric ceramic driving module 309, and one end of the valve core 310 is used for cooperating with the gas outlet, and the piezoelectric ceramic driving module 309 is used for being powered on to drive the valve core 310 to move, so as to change the opening degree of the gas outlet.

[0035] In this embodiment, the precision pressure regulating valve 3 employs a piezoelectric ceramic drive module 309 to control the valve core 310, achieving high-precision linear motion, which, in conjunction with the valve seat 307, enables precise air pressure regulation. Specifically, in conjunction with the attached... Figure 3 As shown, the first interface 301 serves as the inlet of the pressure regulating valve. Gas from the second pipeline 7 can enter the closed cavity formed by the tail cover 306 and the base 305 through the first interface 301, and then flow into the gas outlet of the valve seat 307 through the closed cavity. The valve core 310 is initially in the state of closing the gas outlet on the valve seat 307. After the piezoelectric ceramic drive module 309 is energized, the piezoelectric ceramic will deform, which will drive the valve core 310 to make linear motion (see attached diagram). Figure 3 (In the Z-axis direction), changing the displacement of the valve core 310 alters the opening size of the gas outlet mating surface between the valve core 310 and the valve seat 307, thereby regulating the gas flow rate through the gas outlet. The gas from the outlet enters the four-way channel 308, which then flows through the second interface 302, the third interface 303, and the fourth interface 304 to the pressure sensor 5, the buffer gas cylinder 4, and the thruster, respectively. When the piezoelectric ceramic drive module 309 drives the valve core 310 to adjust the gas flow rate at the outlet, pressure fluctuations may occur within the cavity of the four-way channel 308, preventing a stable gas output to the thruster and hindering the achievement of high stability. To achieve high thrust output with low noise, this pressure regulating device includes a buffer gas cylinder 4 outside the precision pressure regulating valve 3. The buffer gas cylinder 4 is connected to the third port 303 of the precision pressure regulating valve 3 via a fourth pipeline 9. Its main function is to provide a buffer time for pressure regulation. Specifically, when the outlet flow at the fourth port 304 increases, the buffer gas cylinder 4 can compensate for the outflowing gas, giving the control system sufficient response time to increase the opening of the gas outlet on the valve seat 307 and maintain pressure stability. When the outlet flow at the fourth port 304 decreases, the buffer gas cylinder 4 can compensate for the inflowing gas, giving the control system sufficient response time to decrease the opening of the gas outlet on the valve seat 307 and maintain pressure stability.

[0036] It is understandable that the first interface 301 is the gas inlet of the precision pressure regulating valve 3, and the second interface 302, the third interface 303 and the fourth interface 304 are all gas outlets of the precision pressure regulating valve 3. The buffer gas cylinder 4 is equivalent to increasing the volume of the four-way channel 308, which can maintain the pressure balance at the outlet during the process of regulating the gas flow.

[0037] It should be noted that the piezoelectric ceramic drive module 309 can achieve a displacement of 0-200 micrometers by inputting a voltage of 0-150V, thereby driving the valve core 310 to move up and down (see attached diagram). Figure 3The movement of the valve core 310 (in the Z-axis direction) from 0 to 200 micrometers can be a conical hole fit between the valve core 310 and the valve seat 307. By changing the displacement, the opening size of the two mating surfaces can be adjusted, thereby adjusting the gas flow rate and maintaining the pressure balance at the outlet.

[0038] Optionally, the precision pressure regulating valve 3 further includes a fixed seat 311, a support seat 312, a first pressing seat 313, and a spring 314. The fixed seat 311 is threadedly connected to the base 305 and is located within the enclosed cavity. The piezoelectric ceramic drive module 309 is disposed on the fixed seat 311. The support seat 312 is connected to the end of the fixed seat 311 away from the base 305. The first pressing seat 313 is threadedly connected to the middle position of the support seat 312. The spring 314 is sleeved on the valve core 310, with one end of the spring 314 abutting against the first pressing seat 313 and the other end abutting against a shoulder on the valve core 310. The valve core 310 is used to close the gas outlet under the elastic force of the spring 314.

[0039] In this embodiment, in conjunction with the appendix Figure 3 As shown, the base 305 and the tail cover 306 can be detachably connected together by bolts. The upper end of the base 305 has an annular inner wall with internal threads. The fixed seat 31 can be connected to the annular inner wall of the base 305 by threaded connection. The piezoelectric ceramic drive module 309 can be installed on the fixed seat 311. The support seat 312 can be a rod-shaped structure, which can be connected to the fixed seat 311 by bolts. The first clamping seat 313 can be threaded to the middle position of the support seat 312. The support seat 312 and the valve seat 307 are arranged coaxially. The upper end of the valve core 310 passes through the support seat 312. The spring 314 is sleeved on the valve core 310. One end of the spring 314 abuts against the first clamping seat 313, and the other end abuts against the shoulder on the valve core 310. The spring 314 is used to adjust the pressure of the valve core 310 and the valve seat 307 in the initial state to ensure that the valve core 310 and the valve seat 307 fit tightly and do not leak air.

[0040] Optionally, the precision pressure regulating valve 3 further includes a second clamping seat 315, which is threadedly connected to the groove and is used to abut against the valve seat 307, and the valve core 310 is used to pass through the second clamping seat 315.

[0041] In this embodiment, in conjunction with the appendix Figure 3 As shown, the second clamping seat 315 can be a cylindrical structure with external threads on its outer peripheral wall. It can be threaded into the groove and used to abut against the valve seat 307 to confine the valve seat 307 within the groove.

[0042] Optionally, a gas passage is formed in the base 305 and communicates with the first interface 301 and the closed cavity respectively, and a filter core 316 is arranged in the gas passage.

[0043] In the embodiment, the high-pressure valve 1, the two-stage pressure reducing valve 2, the precision pressure regulating valve 3, the buffer gas cylinder 4 and the pressure sensor 5 are arranged on the mounting plate 10, and the mounting plate 10 is connected with the satellite body, so that the device is installed on the satellite. Figure 3 As shown in the figure, a gas passage is formed in the base 305 and communicates with the first interface 301 and the closed cavity respectively, so that the gas from the second pipeline 7 can flow into the closed cavity through the first interface 301 and the gas passage. A filter core 316 is arranged in the gas passage to filter the gas flowing into the closed cavity.

[0044] Optionally, the precision pressure regulating valve 3 further comprises a high-pressure sealed connector 317 arranged on the tail cover 306, wherein the high-pressure sealed connector 317 is partially arranged in the closed cavity and partially arranged outside the closed cavity, and the high-pressure sealed connector 317 is electrically connected with the piezoelectric ceramic driving module 309.

[0045] In the embodiment, the high-pressure sealed connector 317 is used to connect the driving cable of the piezoelectric ceramic driving module 309 to the outside of the precision pressure regulating valve 3 to control the driving of the piezoelectric ceramic driving module 309. The piezoelectric ceramic driving module 309 can convert the electric signal into displacement through the input of voltage to drive the valve core 310 to move up and down, so as to realize the precision adjustment of the opening size of the gas outlet on the valve seat 307.

[0046] Optionally, the device further comprises a mounting plate 10, and the high-pressure valve 1, the two-stage pressure reducing valve 2, the precision pressure regulating valve 3, the buffer gas cylinder 4 and the pressure sensor 5 are arranged on the mounting plate 10, and the mounting plate 10 is used to be connected with the satellite body.

[0047] In the embodiment, the high-pressure valve 1, the two-stage pressure reducing valve 2, the precision pressure regulating valve 3, the buffer gas cylinder 4 and the pressure sensor 5 are arranged on the mounting plate 10, and the mounting plate 10 is connected with the satellite body, so that the device is installed on the satellite. Figure 1 As shown in the figure, the high-pressure valve 1, the two-stage pressure reducing valve 2, the precision pressure regulating valve 3, the buffer gas cylinder 4 and the pressure sensor 5 are arranged on the mounting plate 10, and the mounting plate 10 is connected with the satellite body, so that the device is installed on the satellite.

[0048] Optionally, the device further comprises a pipeline filter 11 arranged on the mounting plate 10, and the second pipeline 7 comprises a first pipe 701 and a second pipe 702, one end of the pipeline filter 11 is connected with the first interface 301 through the first pipe 701, and the other end of the pipeline filter 11 is connected with the two-stage pressure reducing valve 2 through the second pipe 702.

[0049] In the embodiment, the high-pressure valve 1, the two-stage pressure reducing valve 2, the precision pressure regulating valve 3, the buffer gas cylinder 4 and the pressure sensor 5 are arranged on the mounting plate 10, and the mounting plate 10 is connected with the satellite body, so that the device is installed on the satellite. Figure 1As shown, a pipeline filter 11 is also arranged on the mounting plate 10, wherein one end of the pipeline filter 11 is connected with the first interface 301 of the precision pressure regulating valve 3 through the first pipe 701, and the other end of the pipeline filter 11 is connected with the two-stage pressure reducing valve 2 through the second pipe 702. In this way, after the high-pressure gas is reduced to the required pressure by the two-stage pressure reducing valve 2, the low-pressure gas enters the pipeline filter 11 through the second pipe 702, and the impurity components contained in the pipeline are filtered, and the low-pressure gas is filtered by the pipeline filter 11 and then enters the precision pressure regulating valve 3 through the first pipe 701.

[0050] Optionally, the mounting plate 10 is provided with a support 12, the support 12 comprises an upper body 1201 and a lower body 1202, the pipeline filter 11 is arranged between the upper body 1201 and the lower body 1202, and the upper body 1201 and the lower body 1202 are detachably connected.

[0051] In this embodiment, the accompanying drawings are combined. Figure 2 As shown, the upper body 1201 and the lower body 1202 of the support 12 are in a split structure, wherein the upper body 1201 can be bolted directly above the lower body 1202 (the accompanying drawings are combined Figure 2 in the Z-axis direction), and a space for installing the pipeline filter 11 is left between the upper body 1201 and the lower body 1202. The lower body 1202 of the support 12 can be bolted to the mounting plate 10, the pipeline filter 11 can be installed between the upper body 1201 and the lower body 1202, and then the upper body 1201 and the lower body 1202 are fastened and connected by bolts, so as to fix the position of the pipeline filter 11.

[0052] Optionally, the mounting plate 10 is provided with an arc-shaped seat 13, and the buffer gas cylinder 4 is fastened to the arc-shaped seat 13 by a throat clamp.

[0053] In this embodiment, the accompanying drawings are combined. Figure 2 As shown, the mounting plate 10 is provided with an arc-shaped seat 13, an arc-shaped groove compatible with the outer periphery of the buffer gas cylinder 4 is formed in the upper part of the arc-shaped seat 13, the buffer gas cylinder 4 can be installed in the arc-shaped groove of the arc-shaped seat 13, and can be fastened to the arc-shaped seat 13 by a throat clamp.

[0054] Optionally, first connecting holes are formed at four corners of the mounting plate 10 respectively, second connecting holes are formed on the satellite body, and the first connecting holes and the second connecting holes are used for being connected by screws to fix the mounting plate 10 relative to the satellite body.

[0055] In this embodiment, the accompanying drawings are combined. Figure 1As shown, the first connecting hole and the second connecting hole can be threaded holes, and the mounting plate 10 is fixed relative to the satellite body by screwing the first connecting hole of the mounting plate 10 and the second connecting hole of the satellite body.

[0056] It should be noted that the envelope size of the whole device can be designed to be no more than 400mmx250mmx96.5mm, and the device is installed on the satellite through the mounting plate 10, which is simple in structure and convenient for installation and replacement of the device. Meanwhile, the device has no redundant association with other parts of the satellite, and is very convenient for use, replacement and repair.

[0057] Optionally, the two-stage pressure reducing valve 2 comprises a high-pressure pressure reducing valve and a low-pressure pressure reducing valve, the high-pressure pressure reducing valve is connected with the first pipeline 6, and the low-pressure pressure reducing valve is connected with the second pipeline 7.

[0058] In the embodiment, high-pressure gas can enter the high-pressure pressure reducing valve from the first pipeline 6 for one-stage pressure reduction, and then enter the low-pressure pressure reducing valve for two-stage pressure reduction, so as to ensure that the high-pressure cold gas output by the gas cylinder is gradually reduced to the required nominal pressure.

[0059] In addition, the application also provides a cold gas micro-propulsion system comprising a high-pressure gas cylinder, a thruster and the gas pressure regulating device as described above.

[0060] Since the technical improvement and technical effects of the cold gas micro-propulsion system are the same as those of the gas pressure regulating device, the technical effects of the cold gas micro-propulsion system will not be described in detail.

[0061] In addition, the application also provides a satellite comprising the cold gas micro-propulsion system as described above.

[0062] Since the technical improvement and technical effects of the satellite are the same as those of the cold gas micro-propulsion system, the technical effects of the satellite will not be described in detail.

[0063] The terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0064] Although the application is disclosed as above, the protection scope of the application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the application, and these changes and modifications will fall within the protection scope of the application.

Claims

1. A pressure regulating device, characterized in that, include: The system includes a high-pressure valve (1), a two-stage pressure reducing valve (2), a precision pressure regulating valve (3), a buffer gas cylinder (4), and a pressure sensor (5). One end of the high-pressure valve (1) is connected to the high-pressure gas cylinder, and the other end of the high-pressure valve (1) is connected to the two-stage pressure reducing valve (2) via a first pipeline (6). The precision pressure regulating valve (3) has a first interface (301), a second interface (302), a third interface (303), and a fourth interface (304). The first interface (301) is connected to the two-stage pressure reducing valve (2) via a first pipeline (6). The second interface (302) is connected to the pressure sensor (5) via a second pipe (7), and the third interface (303) is connected to the buffer gas cylinder (4) via a fourth pipe (9). The fourth interface (304) is used to connect to the thruster. The precision pressure regulating valve (3) includes a base (305), a tail cover (306), and a valve seat (307). The tail cover (306) is connected to the base (305) and together they form a closed cavity. The base (306) is connected to the base (305) via a second pipe (7). The second interface (302) is connected to the pressure sensor (5) via a third pipe (8). The third interface (303) is connected to the buffer gas cylinder (4) via a fourth pipe (9). The fourth interface (304) is used to connect to the thruster. The precision pressure regulating valve (3) includes a base (305), a tail cover (306), and a valve seat (307). The tail cover (306) is connected to the base (305) and together they form a closed cavity. 5) A groove communicating with the closed cavity is provided on the valve seat (307), which is disposed in the groove and has a gas outlet communicating with the closed cavity; a four-way channel (308) is provided inside the base (305), which is respectively connected to the gas outlet, the second interface (302), the third interface (303) and the fourth interface (304), and the first interface (301) is connected to the closed cavity; the closed cavity is provided with There is a piezoelectric ceramic drive module (309) and a valve core (310). The valve core (310) is inserted through the piezoelectric ceramic drive module (309) and one end is used to make contact with the gas outlet. The piezoelectric ceramic drive module (309) is used to energize and drive the valve core (310) to move, so as to change the opening degree of the gas outlet. The two-stage pressure reducing valve (2) includes a high-pressure pressure reducing valve and a low-pressure pressure reducing valve. The high-pressure pressure reducing valve is connected to the first pipeline (6) and the low-pressure pressure reducing valve is connected to the second pipeline (7).

2. The air pressure regulating device according to claim 1, characterized in that, The precision pressure regulating valve (3) further includes a fixed seat (311), a support seat (312), a first pressing seat (313), and a spring (314). The fixed seat (311) is threaded to the base (305) and is located in the closed cavity. The piezoelectric ceramic drive module (309) is disposed on the fixed seat (311). The support seat (312) is connected to the end of the fixed seat (311) away from the base (305). The first pressing seat (313) is threaded to the middle position of the support seat (312). The spring (314) is sleeved on the valve core (310). One end of the spring (314) abuts against the first pressing seat (313), and the other end abuts against the shoulder on the valve core (310). The valve core (310) is used to close the gas outlet under the elastic force of the spring (314).

3. The air pressure regulating device according to claim 1, characterized in that, The precision pressure regulating valve (3) further includes a second clamping seat (315), which is threaded to the groove and is used to abut against the valve seat (307). The valve core (310) is used to pass through the second clamping seat (315).

4. The air pressure regulating device according to claim 1, characterized in that, The precision pressure regulating valve (3) also includes a high-pressure sealing connector (317), which is disposed on the tail cover (306). The high-pressure sealing connector (317) is partially located inside the closed cavity and partially located outside the closed cavity. The high-pressure sealing connector (317) is electrically connected to the piezoelectric ceramic drive module (309).

5. The air pressure regulating device according to claim 1, characterized in that, It also includes a mounting plate (10), on which the high-pressure valve (1), the two-stage pressure reducing valve (2), the precision pressure regulating valve (3), the buffer gas cylinder (4) and the pressure sensor (5) are respectively arranged. The mounting plate (10) is used to connect to the satellite body.

6. The air pressure regulating device according to claim 5, characterized in that, It also includes a pipeline filter (11), which is arranged on the mounting plate (10). The second pipeline (7) includes a first fitting (701) and a second fitting (702). One end of the pipeline filter (11) is connected to the first interface (301) through the first fitting (701), and the other end of the pipeline filter (11) is connected to the two-stage pressure reducing valve (2) through the second fitting (702).

7. A cold gas micro-propulsion system, characterized in that, It includes a high-pressure gas cylinder, a thruster, and a gas pressure regulating device as described in any one of claims 1-6.

8. A satellite, characterized in that, Including the cold air micro-propulsion system as described in claim 7.

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