Solenoid valve device, liquid rocket pressurization conveying system and liquid rocket

Abstract

The embodiment of the invention provides an electromagnetic valve device, a liquid rocket pressurization conveying system and a liquid rocket. The electromagnetic valve device comprises an electromagnetic valve, a main valve, a first channel, a second channel and a third channel. The main valve comprises a main valve element, a back pressure cavity, an annular cavity, a medium inlet channel and a medium outlet channel. The medium inlet channel and the medium outlet channel are communicated with the annular cavity structurally; the third channel is normally communicated with the outside; the first channel is normally communicated with a medium inlet channel of the main valve; the second channel is normally communicated with a backpressure cavity of the main valve; the electromagnetic valve responds to the change of the power supply state, and the electromagnetic valve device is set to be in a first working state or a second working state; in the first working state, the first channel is communicated with the second channel, and the first channel and the second channel are both disconnected with the third channel, so that the medium inlet channel is disconnected with the medium outlet channel; and in the second working state, the second channel and the third channel are both disconnected from the first channel, the second channel is communicated with the third channel, and the medium inlet channel is communicated with the medium outlet channel.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and in particular to an electromagnetic valve device, a liquid rocket pressurization and delivery system, and a liquid rocket. Background Technology

[0002] To enhance pressurization capacity, liquid-fueled rocket pressurization and delivery systems transform high-pressure gas into a high-pressure cryogenic medium through cryogenic environments such as liquid oxygen tanks. Controlling the flow of this high-pressure cryogenic medium requires high-pressure cryogenic valves, with high-pressure cryogenic solenoid valves being the optimal solution. Typically, liquid rocket pressurization and delivery cryogenic control systems employ a combination of cryogenic pneumatic shut-off valves and ambient temperature solenoid valves, or a combination of cryogenic pneumatic ball valves and ambient temperature solenoid valves. For example... Figure 4 As shown, the current cryogenic pipeline system uses a cryogenic pneumatic shut-off valve 7 controlled by a two-position three-way solenoid valve 6 to achieve its opening and closing functions. The two-position three-way solenoid valve 6 and the cryogenic pneumatic shut-off valve 7 are connected via a control gas pipeline 5. A separate control gas source, namely a control gas cylinder 4, is required and connected to the two-position three-way solenoid valve 6. The outlet of the two-position three-way solenoid valve 6 is pneumatically connected to the cryogenic pneumatic shut-off valve 7. The cryogenic pneumatic shut-off valve 7 is connected to the cryogenic medium 9 via a cryogenic medium pipeline 8. This system has a series of drawbacks, including system complexity, heavy weight, large space occupation, and high cost.

[0003] In the process of developing this invention, the applicant discovered at least the following problems in the prior art: Traditional liquid rocket pressurization and cryogenic control system combinations suffer from a series of drawbacks, including system complexity, heavy weight, large space occupation, and high cost, which greatly reduces system reliability and economy. Summary of the Invention

[0004] This invention provides an electromagnetic valve device, a liquid rocket pressurization and delivery system, and a liquid rocket, to at least solve the problems of traditional liquid rocket pressurization and delivery cryogenic control system combination forms, such as system complexity, heavy weight, large space occupation, and high cost, which lead to a significant reduction in system reliability and economy.

[0005] To achieve the above objectives, in a first aspect, embodiments of the present invention provide a solenoid valve device, comprising: a solenoid valve, a main valve, a first channel, a second channel, and a third channel; The main valve includes a main valve core, a back pressure chamber and an annular chamber isolated on both sides of the main valve core, a medium inlet channel and a medium outlet channel; the medium inlet channel and the medium outlet channel are both structurally connected to the annular chamber; The third channel is normally connected to the outside of the solenoid valve device; the first channel is normally connected to the medium inlet channel of the main valve; the second channel is normally connected to the back pressure chamber of the main valve. The solenoid valve is used to respond to changes in the power supply state and set the working state of the solenoid valve device to a first working state or a second working state. The first working state is that the first channel and the second channel are connected, and both the first channel and the second channel are disconnected from the third channel, so that the main valve core of the main valve presses against the medium outlet channel, and the medium inlet channel is disconnected from the medium outlet channel; The second operating state is that both the second channel and the third channel are disconnected from the first channel, and the second channel is connected to the third channel, so that the main valve core is away from the medium outlet channel, and the medium inlet channel is connected to the medium outlet channel.

[0006] Furthermore, the main valve also includes a main valve body, a return spring, and a medium outlet seat; The medium outlet seat is provided with the medium outlet channel inside; The main valve core has an internal blind hole for installation, and the return spring is sleeved in the blind hole for installation of the main valve core. The main valve body is provided with a cylindrical single-step blind hole inside, and the diameter of the opening section of the cylindrical single-step blind hole is larger than the diameter of the bottom section. The return spring, the main valve core, and the medium outlet seat are installed sequentially from the bottom to the opening of the cylindrical single-step blind hole, with the left part of the main valve core located at the bottom of the hole and the right part located at the opening of the hole. The outer diameter of the main valve core is equal to the diameter of the bottom section of the cylindrical single-step blind hole. The portion of the medium outlet seat embedded in the orifice section of the cylindrical single-step blind hole is cylindrical, and the outer diameter of the portion of the medium outlet seat embedded in the orifice section of the cylindrical single-step blind hole is equal to the diameter of the orifice section of the cylindrical single-step blind hole. The space between the main valve core and the bottom of the cylindrical single-step blind hole constitutes the back pressure cavity, and the space enclosed by the right part of the main valve core, the orifice section of the cylindrical single-step blind hole, and the medium outlet seat constitutes the annular cavity.

[0007] Furthermore, at least one friction-reducing ring is circumferentially embedded on the outer side of the main valve core.

[0008] Furthermore, a groove is provided circumferentially on the outer side of the main valve core.

[0009] Furthermore, an energy storage sealing ring is provided circumferentially on the outer left end of the main valve core.

[0010] Furthermore, the left end face of the medium outlet channel is shaped like a boss; An annular valve core sealing block is embedded in the middle of the right end face of the main valve core, and the annular valve core sealing block is used to cooperate with the left end face of the boss-shaped medium outlet channel.

[0011] Furthermore, the solenoid valve includes: a solenoid valve body, a solenoid valve cavity located in the upper part of the solenoid valve body, a solenoid valve core, a support spring, and a pressure cap; An annular groove is coaxially provided at the bottom of the solenoid valve chamber. The support spring is disposed in the annular groove; The solenoid valve core is installed in the solenoid valve cavity, and the circumferential side of the solenoid valve core is fitted with the axial inner wall of the solenoid valve cavity with a clearance. The upper end of the support spring is supported on the bottom end of the solenoid valve core; The pressure cap is disposed at the upper end of the solenoid valve core; The third channel extends from the lower end to the upper end of the pressure cap along the axis of the pressure cap, and the lower end face of the third channel is a boss shape; The first channel passes through the axis of the annular groove and is structurally connected to the solenoid valve cavity; The second channel is located at the bottom of the solenoid valve cavity and is structurally connected to the solenoid valve cavity.

[0012] Furthermore, the material of the annular valve core sealing block includes polyimide, polychlorotrifluoroethylene, reinforced polytetrafluoroethylene, polyvinylidene fluoride resin, or polyether ether ketone.

[0013] Furthermore, the main valve core is made of austenitic stainless steel; the main valve body is made of titanium alloy.

[0014] Furthermore, the right end face of the main valve core is provided with an annular sealing groove for accommodating the annular valve core sealing block. The annular valve core sealing block is pressed into the annular sealing groove by hot pressing, or the annular sealing groove is fixed by spinning and closing after the annular valve core sealing block is installed in the annular sealing groove.

[0015] Secondly, embodiments of the present invention provide a liquid rocket pressurization and delivery system, including: any of the aforementioned solenoid valve devices.

[0016] Thirdly, embodiments of the present invention provide a liquid rocket, including: a solenoid valve device as described above.

[0017] The above technical solution has the following beneficial effects: by setting the solenoid valve, main valve, first channel, second channel and third channel as a whole to form a solenoid valve device, the complex system of the existing high pressure cryogenic system that uses a combination form to realize the medium flow control can be solved. It can effectively reduce the complexity of the cryogenic control system of the liquid rocket pressurization and delivery system, improve flight reliability, and at the same time reduce the weight and space occupied by the pressurization and delivery system itself, and reduce the rocket launch cost. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a solenoid valve device according to one embodiment of the present invention; Figure 2 This is a cross-sectional view of the main valve core of a solenoid valve device according to one embodiment of the present invention; Figure 3 This is a front view of a solenoid valve device according to one embodiment of the present invention; Figure 4 This is a schematic diagram of a cryogenic pipeline system under existing technology.

[0020] The reference numerals in the attached figures are as follows: 1. Solenoid valve; 2. Main valve; 31. First channel; 32. Second channel; 33. Third channel; 21. Main valve core; 22. Back pressure chamber; 23. Annular chamber; 24. Medium inlet channel; 25. Medium outlet channel; 26. Main valve body; 27. Return spring; 28. Medium outlet seat; 211. Mounting blind hole; 261. Cylindrical single-step blind hole; 212. Anti-friction ring; 213. Groove; 214. Energy storage sealing ring; 215. Annular valve core sealing block; 11. Solenoid valve body; 12. Solenoid valve chamber; 13. Solenoid valve core; 14. Support spring; 15. Pressure cap; 121. Annular groove; 4. Control gas cylinder; 5. Control gas pipeline; 6. Two-position three-way solenoid valve; 7. Cryogenic pneumatic shut-off valve; 8. Cryogenic medium pipeline; 9. Cryogenic medium. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] On the one hand, such as Figure 1 As shown, an embodiment of the present invention provides a solenoid valve device, including: a solenoid valve 1, a main valve 2, a first channel 31, a second channel 32 and a third channel 33; The main valve 2 includes a main valve core 21, a back pressure chamber 22 and an annular chamber 23 isolated on both sides of the main valve core 21, a medium inlet channel 24 and a medium outlet channel 25; the medium inlet channel 24 and the medium outlet channel 25 are both structurally connected to the annular chamber 23; The third channel 33 is normally connected to the outside of the solenoid valve device; the first channel 31 is normally connected to the medium inlet channel 24 of the main valve 2; the second channel 32 is normally connected to the back pressure chamber 22 of the main valve 2. The solenoid valve 1 is used to respond to changes in the power supply state and set the working state of the solenoid valve device to a first working state or a second working state. The first working state is that the first channel 31 and the second channel 32 are connected, and the first channel 31 and the second channel 32 are both disconnected from the third channel 33, so that the main valve core 21 of the main valve 2 presses against the medium outlet channel 25, and the medium inlet channel 24 is disconnected from the medium outlet channel 25; The second working state is that the second channel 32 and the third channel 33 are both disconnected from the first channel 31, and the second channel 32 is connected to the third channel 33, so that the main valve core 21 is away from the medium outlet channel 25, and the medium inlet channel 24 is connected to the medium outlet channel 25.

[0023] In some embodiments, the solenoid valve 1 can be configured to operate in a first state when energized and in a second state when de-energized, or it can be configured to operate in the second state when energized and in the first state when de-energized, depending on specific requirements. The following explanation uses the example of entering the first state when de-energized and the second state when energized: When the power is off, after the high-pressure low-temperature medium enters the solenoid valve device from the medium inlet channel 24, it first enters the annular cavity 23 of the main valve 2, and then enters the solenoid valve 1 through the first channel 31 via the annular cavity 23. At this time, the first channel 31 and the second channel 32 are connected, and the medium will enter the back pressure cavity 22 of the main valve core 21 from the second channel 32. At this time, the main valve core 21 is sealed by the medium pressure and the left end face of the medium outlet channel 25, thus realizing the function of power-off load-bearing shutdown.

[0024] When energized, solenoid valve 1 blocks the connection between the first channel 31 and the second channel 32, and the third channel 33 is connected to the second channel 32 through solenoid valve 1, discharging the medium in the back pressure chamber 22 of the main valve 2. The pressure in the back pressure chamber 22 of the main valve core 21 quickly becomes normal pressure. At this time, the medium pressure at the right end of the main valve core 21 is high pressure. Under the action of the medium thrust, the main valve core 21 is displaced to the left, and the valve core is fully opened. The medium flows out from the medium inlet channel through the medium outlet channel, realizing the energized load opening function.

[0025] The embodiments of the present invention have the following technical effects: by setting the solenoid valve, main valve, first channel, second channel and third channel as a whole to form a solenoid valve device, the complex system of the existing high pressure cryogenic system that uses a combination form to realize the medium flow control can be solved. It can effectively reduce the complexity of the cryogenic control system of the liquid rocket pressurization and delivery system, improve flight reliability, and at the same time reduce the weight and space occupied by the pressurization and delivery system itself, and reduce the rocket launch cost.

[0026] Furthermore, the main valve 2 also includes a main valve body 26, a return spring 27, and a medium outlet seat 28; The medium outlet seat 28 is provided with the medium outlet channel 25 inside; The main valve core 21 has a blind mounting hole 211 inside, and the return spring 27 is sleeved in the blind mounting hole 211 of the main valve core 21. The main valve body 26 is provided with a cylindrical single-step blind hole 261 inside, and the diameter of the opening section of the cylindrical single-step blind hole 261 is larger than the diameter of the bottom section. The return spring 27, the main valve core 21, and the medium outlet seat 28 are installed sequentially from the bottom to the opening of the cylindrical single-step blind hole 261, with the left part of the main valve core 21 located at the bottom of the hole and the right part located at the opening. The outer diameter of the main valve core 21 is equal to the diameter of the bottom section of the cylindrical single-step blind hole 261. The portion of the medium outlet seat 28 embedded in the orifice section of the cylindrical single-step blind hole 261 is cylindrical, and the outer diameter of the portion of the medium outlet seat 28 embedded in the orifice section of the cylindrical single-step blind hole 261 is equal to the diameter of the orifice section of the cylindrical single-step blind hole 261. The space between the main valve core 21 and the bottom of the cylindrical single-step blind hole 261 constitutes the back pressure cavity 22, and the space enclosed by the right part of the main valve core 21, the orifice section of the cylindrical single-step blind hole 261 and the medium outlet seat 28 constitutes the annular cavity 23.

[0027] In some embodiments, the return spring 27 is in a compressed state. In the first working state, it presses the main valve core 21 against the right end face of the medium outlet seat 28, sealing the medium outlet channel 25. In the second working state, since the pressure in the back pressure chamber becomes normal pressure and the pressure in the annular cavity 23 is high pressure, under the unbalanced pressure, it overcomes the elastic force of the return spring 27 and pushes the main valve core 21 to the end away from the medium outlet seat 28, thereby connecting the medium inlet channel 24 and the medium outlet channel 25.

[0028] Furthermore, at least one friction-reducing ring 212 is circumferentially embedded on the outer side of the main valve core 21.

[0029] In some embodiments, at least one friction-reducing ring 212 can reduce the friction between the main valve core 21 and the main valve body 26, while providing a certain sealing effect.

[0030] Furthermore, a groove 213 is provided circumferentially on the outer side of the main valve core 21.

[0031] In some embodiments, a groove 213 is provided to reduce the contact area between the main valve core 21 and the main valve body 26, thereby preventing them from getting stuck.

[0032] Furthermore, an energy storage sealing ring 214 is provided circumferentially on the outer left side of the main valve core 21.

[0033] In some embodiments, the energy storage seal 214 has a one-way leakage property. The energy storage seal 214 allows leakage from the back pressure chamber 22 to the annular chamber 23, but prevents leakage from the annular chamber 23 to the back pressure chamber. In the first working state, it can ensure that the medium pressure in the back pressure chamber 22 and the annular chamber 23 is balanced. In the second working state, it can make the back pressure chamber 22 return to normal pressure more quickly, thereby improving the valve body switching speed.

[0034] Furthermore, the left end face of the medium outlet channel 25 is in the shape of a boss; An annular valve core sealing block 215 is embedded in the middle of the right end face of the main valve core 21. The annular valve core sealing block 215 is used to cooperate with the left end face of the boss-shaped medium outlet channel 25.

[0035] In some embodiments, the annular valve core sealing block 215 corresponds to and mates with the left end face of the boss-shaped medium outlet channel 25, improving sealing performance. Furthermore, both the inner and outer rings of the annular valve core sealing block 215 contact the side surfaces of the embedded groove structure, providing better installation stability compared to a completely circular sealing block.

[0036] Further, the solenoid valve 1 includes: a solenoid valve body 11, a solenoid valve cavity 12 located in the upper part of the solenoid valve body 11, a solenoid valve core 13, a support spring 14, and a pressure cap 15; An annular groove 121 is coaxially provided at the bottom of the solenoid valve cavity 12; The support spring 14 is disposed in the annular groove 121; The solenoid valve core 13 is installed in the solenoid valve cavity 12, and the circumferential side of the solenoid valve core 13 is fitted with the axial inner wall of the solenoid valve cavity 12 with a clearance. The upper end of the support spring 14 is supported by the bottom end of the solenoid valve core 13; The pressure cap 15 is disposed at the upper end of the solenoid valve core 13; The third channel 33 extends from the lower end to the upper end of the pressure cap 15 along the axis of the pressure cap 15, and the lower end surface of the third channel 33 is in the shape of a boss. The first channel 31 passes through the axis of the annular groove 121 and is structurally connected to the solenoid valve cavity 12; The second channel 32 is located at the bottom of the solenoid valve cavity 12 and is structurally connected to the solenoid valve cavity 12.

[0037] Furthermore, the material of the annular valve core sealing block includes polyimide, polychlorotrifluoroethylene, reinforced polytetrafluoroethylene, polyvinylidene fluoride resin, or polyether ether ketone.

[0038] Furthermore, the main valve core 21 is made of austenitic stainless steel; the main valve body 26 is made of titanium alloy.

[0039] Furthermore, the right end face of the main valve core 21 is provided with an annular sealing groove for accommodating the annular valve core sealing block 215. The annular valve core sealing block 215 is pressed into the annular sealing groove by hot pressing, or the annular sealing groove is fixed by spinning and closing after the annular valve core sealing block 215 is installed in the annular sealing groove.

[0040] Secondly, embodiments of the present invention provide a liquid rocket pressurization and delivery system, including: any of the aforementioned solenoid valve devices.

[0041] Thirdly, embodiments of the present invention provide a liquid rocket, including: a solenoid valve device as described above.

[0042] The technical solutions of the present invention will be described in detail below with reference to specific application examples. For technical details not described in the implementation process, please refer to the relevant descriptions above.

[0043] This invention provides a solenoid valve device, which is also a high-pressure cryogenic solenoid valve dynamic sealing device or structure, and a high-pressure cryogenic control valve. The main valve core has been designed with a targeted cryogenic and high-pressure dynamic sealing structure. The whole valve has the characteristics of reliable performance under high pressure and low temperature conditions, good sealing performance, small size and light weight. It solves the shortcomings of existing systems that use a combination form to achieve media flow control under high pressure and low temperature conditions, such as complexity, large size, heavy weight and high cost, as well as the problems of low operating pressure or large electromagnet size of step-by-step direct-acting solenoid valves.

[0044] This invention provides a solenoid valve device, including a main valve body 26, a main valve core assembly, a return spring 27, an outlet valve seat (medium outlet seat) 28, a secondary valve body (solenoid valve body) 11, a secondary valve core (solenoid valve core) 13, and a secondary valve cap (cap) 15; wherein the main valve core assembly is composed of a valve core base (main valve core) 21, a valve core sealing block (annular valve core sealing block) 215, an energy storage sealing ring 214, a clamping nut, and a friction reducing ring 212.

[0045] The return spring 27 is installed inside the main valve core assembly, which is assembled inside the main valve body 26. The sealing surface of the main valve core assembly faces the outlet valve seat (medium outlet seat) 28, which is installed inside the main valve body 26. The auxiliary valve body (solenoid valve body) 11 is installed on the main valve body 26 and connected by screws. The auxiliary valve core (solenoid valve core) 13 is installed inside the auxiliary valve body (solenoid valve body) 11, and the auxiliary valve exhaust cap (cap) 15 is installed inside the (solenoid valve body) 11 and connected by threads. The specific structural form is as follows: Figure 1 .

[0046] In the main valve core assembly, the valve core sealing block (annular valve core sealing block) 215 is fixed in the sealing groove by extruding and closing the valve core base (main valve core) 21. An energy storage sealing ring 214 (preferably a flange) is installed inside the sealing ring of the valve core base (main valve core) 21. A clamping nut is installed on the energy storage sealing ring 214 and fixed by threads. An anti-friction ring 212 is installed in the anti-friction groove of the valve core base (main valve core) 21. A total of four rings are present, ultimately forming the valve core assembly. See [link to specific details]. Figure 2 .

[0047] This high-pressure cryogenic solenoid valve features a dynamic sealing structure. The valve core assembly and the main valve body 26 are sealed by an energy storage sealing ring 214. Four friction-reducing rings 212 reduce the friction between the main valve core assembly and the main valve body 26 during movement. The preload of the return spring 27 pushes the main valve core assembly to displace and fit against the sealing end face of the outlet valve seat (medium outlet seat) 28, forming a seal. The outlet valve seat (medium outlet seat) 28 is connected to the main valve body 26 by threads, and a sealing gasket ensures a seal between the outlet valve seat (medium outlet seat) 28 and the main valve body 26. The auxiliary valve body (solenoid valve body) 11 is connected to the main valve body 26 by screws, and a sealing gasket ensures a seal between the auxiliary valve body (solenoid valve body) 11 and the main valve body 26. The secondary valve core (solenoid valve core) 13 is installed inside the secondary valve body (solenoid valve body) 11 and is fixed by the secondary valve exhaust cap (cap) 15. When the power is off, the preload of the support spring 14 on the lower end face of the secondary valve core (solenoid valve core) 13 causes the secondary valve core (solenoid valve core) 13 to move upward and fit against the sealing surface of the secondary valve exhaust cap (cap) 15 to form a seal. When the power is on, the electromagnetic coil inside the secondary valve body (solenoid valve body) 11 generates electromagnetic attraction, causing the secondary valve core (solenoid valve core) 13 to move downward and fit against the sealing end face of the secondary valve body (solenoid valve body) 11 to form a seal.

[0048] The working principle and characteristics of the dynamic sealing structure (device) of this high-pressure cryogenic solenoid valve are as follows: Working principle as follows... Figure 3 As shown, in the power-off state, when the high-pressure low-temperature medium enters the solenoid valve device from the medium inlet channel 24, it first enters the annular cavity 23 formed by the main valve core 21 and the main valve body 26 of the main valve 2, and then enters the annular cavity 12 of the solenoid valve 1 from the first channel 31 through the annular cavity 23 through the first channel 31. Due to the action of the support spring 14 and the medium thrust, the auxiliary valve core 13 is in contact with the boss sealing surface (the lower end face of the boss-shaped third channel 33) of the auxiliary valve exhaust cap (i.e., the cap) 15 to form a seal. The medium will enter the back pressure cavity 22 of the main valve core 21 from the second channel 32. At this time, the main valve core 21 is in contact with the boss sealing surface (the left end face of the boss-shaped medium outlet channel 25) in the left end face of the medium outlet seat 28 under the action of the return spring 27 and the medium pressure to form a seal, realizing the power-off load-closing function.

[0049] When energized, the electromagnetic coil inside the secondary valve body (solenoid valve body) 11 generates electromagnetic attraction, causing the secondary valve core (solenoid valve core) 13 to overcome the spring force of the supporting spring 14 and the thrust of the medium, and then move downward to fit against the boss sealing end face of the secondary valve body (solenoid valve body) 11 (i.e., the upper end face of the boss-shaped first channel 31) to form a seal, blocking the medium from entering the annular cavity (i.e., the solenoid valve cavity 12) formed by the secondary valve body 11 and the secondary valve core (solenoid valve core) 13 from the first channel 31. Since the sealing surface of the secondary valve core (solenoid valve core) 13 and the secondary valve exhaust cap (cap) 15 has separated at this time, and there is a gap between the secondary valve core (solenoid valve core) 13 and the secondary valve body (solenoid valve body) 11, the third channel 33... The second channel 32 is connected to the secondary valve core (solenoid valve core) 13 through the vortex groove in the circumferential direction, and the medium in the back pressure chamber 22 of the main valve core 21 is discharged. Since the energy storage sealing ring has the characteristics of positive sealing (defined as the medium from the sealing surface end of the main valve core 21 to the return spring placement hole end as positive, and the opposite as negative) and reverse leakage, the pressure in the back pressure chamber 22 of the main valve core 21 quickly becomes normal pressure. At this time, the medium pressure at the sealing surface of the right end of the main valve core 21 is high pressure, and an annular medium thrust cross section is formed at the sealing surface of the front end (right end) of the main valve core 21, which is the boss sealing surface (i.e. the left end face of the boss-shaped medium outlet channel 25) in the left end face of the medium outlet valve seat (medium outlet seat) 28. Under the thrust of the medium, the main valve core 21 is displaced to the left until it is in contact with the rear wall (left inner wall or bottom of cylindrical single-step blind hole 261) of the main valve body 26. The valve core is fully opened, and the medium flows out from the medium outlet channel, realizing the function of opening under load when energized.

[0050] Features of the low-temperature, high-pressure dynamic sealing structure of the main valve core assembly: 1. The sealing surface of the main valve core assembly is made of polyimide non-metallic material, which is easy to seal, has a high allowable sealing specific pressure, and can adapt to ultra-low temperature environment conditions. Therefore, the valve core has reliable performance under low-temperature and high-pressure conditions. 2. The main valve core base is made of austenitic stainless steel, and the main valve body is made of titanium alloy. Both materials have good low-temperature performance, and the coefficient of thermal expansion of titanium alloy is lower than that of austenitic stainless steel, so the main valve core is less likely to seize up under low-temperature and high-pressure conditions. 3. The sealing ring of the main valve core assembly adopts a low-temperature resistant energy storage sealing ring, which is reliable under low-temperature and high-pressure conditions and has a low cost. At the same time, in order to reduce friction and improve the guiding performance of the main valve core, four anti-friction rings are added, and the outer diameter of the clamping nut is smaller than the outer diameter of the main valve core base, further improving the operational reliability of the main valve core assembly under low-temperature and high-pressure conditions. 4. The return spring is made of austenitic stainless steel spring wire, which has good low-temperature performance. The return spring is designed with a large preload to avoid the risk of the main valve core opening momentarily after the low-temperature medium enters the valve body quickly.

[0051] In some embodiments, the sealing block in the main valve core assembly uses polyimide as the sealing material. In different embodiments, the sealing material can be replaced depending on the medium used, temperature, and pressure. Replaceable sealing materials include: polychlorotrifluoroethylene, reinforced polytetrafluoroethylene, polyvinylidene fluoride resin, fluoropolymer, or polyetheretherketone (PEEK), etc.

[0052] In some embodiments, the valve core assembly uses a compression-sealing method to fix the sealing block. In different embodiments, the sealing block material and fixing method can be changed according to different operating conditions. Optional sealing materials include polychlorotrifluoroethylene, reinforced polytetrafluoroethylene, polyvinylidene fluoride resin, fluoropolymer, or polyetheretherketone, which are either hot-pressed into the sealing groove of the valve core substrate or fixed by a spin-forming sealing method.

[0053] In some embodiments, the valve core assembly uses a cryogenic energy storage sealing ring for cryogenic sealing. In different embodiments, the sealing method can be changed according to the operating temperature. For example, at temperatures above -40°C, the cryogenic energy storage sealing ring can be replaced with an O-ring for sealing.

[0054] The embodiments of the present invention have the following technical effects: This invention provides a dynamic sealing structure for a high-pressure cryogenic solenoid valve, which solves the problem of complex systems that use a combination of methods to control the flow of media in existing high-pressure cryogenic systems. It can effectively reduce the complexity of the cryogenic control system of liquid rocket pressurization and delivery systems, improve flight reliability, and at the same time reduce the weight and space occupied by the pressurization and delivery system itself, thereby reducing the cost of rocket launch.

[0055] This invention provides a dynamic sealing structure for a high-pressure cryogenic solenoid valve, wherein the main valve core assembly, the valve core sealing block is fixed in the sealing groove by extruding and converging the valve core base, the energy storage sealing ring is installed in the sealing ring of the valve core base, the clamping nut is installed in the energy storage sealing ring and then fixed by threads, and the friction-reducing ring is installed in the friction-reducing groove of the valve core base.

[0056] In this embodiment of the invention, the main valve core sealing surface is made of polyimide. The sealing block is fixed in the sealing groove of the valve core substrate by extruding and closing the valve core substrate. The processing method is simple and easy to process. Since polyimide is a non-metallic material, it has good low-temperature performance and a high allowable sealing ratio, making it easy and reliable to seal under high pressure and low temperature conditions.

[0057] In this embodiment of the invention, the main valve core assembly substrate is made of austenitic stainless steel, and the main valve body is made of titanium alloy. Both materials have good low-temperature performance, and the coefficient of thermal expansion of titanium alloy is lower than that of austenitic stainless steel. Under low-temperature and high-pressure conditions, the main valve core is less prone to seizing and jamming, and has higher reliability at low temperatures.

[0058] In this embodiment of the invention, the main valve core assembly uses an energy storage sealing ring to seal with the main valve body. It has a simple structure, is easy to seal, has reliable low-temperature performance, and low cost, effectively reducing production costs and achieving the goal of increasing efficiency and reducing costs.

[0059] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0060] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features of the single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the invention.

[0061] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0062] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations falling within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is covered in a manner similar to the term "including". Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or".

[0063] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A solenoid valve device, characterized in that, The utility model relates to a kind of electromagnetic valve device, including: Solenoid valve (1), main valve (2), first channel (31), second channel (32) and third channel (33); The main valve (2) includes main valve core (21), back pressure cavity (22) and ring cavity (23) isolated at the two sides of the main valve core (21), medium inlet channel (24) and medium outlet channel (25);The medium inlet channel (24) and the medium outlet channel (25) are both in communication with the ring cavity (23) in structure; The third channel (33) is always connected with the outside of the solenoid valve device;The first channel (31) is always connected with the medium inlet channel (24) of the main valve (2);The second channel (32) is always connected with the back pressure cavity (22) of the main valve (2); The solenoid valve (1) is used to set the working state of the solenoid valve device as the first working state or the second working state in response to the change of power supply state; The first working state is that the first channel (31) and the second channel (32) are connected, and the first channel (31) and the second channel (32) are disconnected with the third channel (33), so that the main valve core (21) of the main valve (2) is pressed to the medium outlet channel (25), and the medium inlet channel (24) is disconnected with the medium outlet channel (25); The second working state is that the second channel (32) and the third channel (33) are disconnected with the first channel (31), and the second channel (32) and the third channel (33) are connected, so that the main valve core (21) is away from the medium outlet channel (25), and the medium inlet channel (24) is connected with the medium outlet channel (25).

2. The electromagnetic valve device according to claim 1, characterized by The main valve (2) further includes main valve body (26), reset spring (27) and medium outlet seat (28); The medium outlet seat (28) is internally provided with the medium outlet channel (25); The main valve core (21) is internally provided with a mounting blind hole (211), and the reset spring (27) is sleeved in the mounting blind hole (211) of the main valve core (21); The main valve body (26) is internally provided with a cylindrical single-step blind hole (261), and the diameter of the hole orifice section of the cylindrical single-step blind hole (261) is larger than the diameter of the hole bottom section; The reset spring (27), the main valve core (21) and the medium outlet seat (28) are sequentially mounted in the cylindrical single-step blind hole (261) from the hole bottom to the hole orifice, and the left part of the main valve core (21) is located at the hole bottom section, and the right part is located at the hole orifice section; The outer diameter of the main valve core (21) is equal to the diameter of the hole bottom section of the cylindrical single-step blind hole (261); The part of the medium outlet seat (28) embedded in the hole orifice section of the cylindrical single-step blind hole (261) is cylindrical, and the outer diameter of the part of the medium outlet seat (28) embedded in the hole orifice section of the cylindrical single-step blind hole (261) is equal to the diameter of the hole orifice section of the cylindrical single-step blind hole (261). The space between the main valve core (21) and the bottom of the cylindrical single-step blind hole (261) constitutes the back pressure cavity (22), and the space surrounded by the right part of the main valve core (21), the orifice section of the cylindrical single-step blind hole (261) and the medium outlet seat (28) constitutes the ring cavity (23).

3. The electromagnetic valve device according to claim 1, wherein At least one week friction-reducing ring (212) is embedded on the outer side of the main valve core (21) in a circumferential direction.

4. The electromagnetic valve device according to claim 1, wherein A groove (213) is arranged on the outer side of the main valve core (21) in a circumferential direction.

5. The electromagnetic valve device according to claim 1, wherein An energy storage sealing ring (214) is arranged on the outer side of the left end of the main valve core (21) in a circumferential direction.

6. The electromagnetic valve device according to claim 1, wherein The left end face of the medium outlet channel (25) is in the form of a boss; An annular valve core sealing block (215) is embedded in the middle of the right end face of the main valve core (21), which is used to correspondingly cooperate with the left end face of the medium outlet channel (25) in the form of a boss.

7. The electromagnetic valve device according to claim 1, wherein The electromagnetic valve (1) comprises an electromagnetic valve body (11), an electromagnetic valve cavity (12) at the upper part of the electromagnetic valve body (11), an electromagnetic valve core (13), a support spring (14), a pressure cap (15); An annular groove (121) is coaxially arranged at the bottom of the electromagnetic valve cavity (12); The support spring (14) is arranged in the annular groove (121); The electromagnetic valve core (13) is installed in the electromagnetic valve cavity (12), and the circumferential side surface of the electromagnetic valve core (13) is in clearance fit with the axial inner wall of the electromagnetic valve cavity (12); The upper end of the support spring (14) supports the bottom end of the electromagnetic valve core (13); The pressure cap (15) is arranged at the upper end of the electromagnetic valve core (13); The third channel (33) penetrates the upper end from the lower end of the pressure cap (15) along the axis of the pressure cap (15), and the lower end face of the third channel (33) is in the form of a boss; The first channel (31) penetrates the axis of the annular groove (121) and is in structural communication with the electromagnetic valve cavity (12); The second channel (32) is at the bottom of the electromagnetic valve cavity (12) and is in structural communication with the electromagnetic valve cavity (12).

8. The electromagnetic valve device according to claim 6, wherein The middle part of the right end face of the main valve core (21) is provided with an annular sealing groove for accommodating the annular valve core sealing block (215), and the annular valve core sealing block (215) is pressed into the annular sealing groove by hot pressing, or the annular sealing groove is fixed in the form of spinning closing after the annular valve core sealing block (215) is installed in the annular sealing groove.

9. A liquid rocket pressurized delivery system, characterized in that, The electromagnetic valve device according to any one of claims 1 to 8. The electromagnetic valve device according to any one of claims 1 to 8.

10. A liquid rocket, characterized in that, The electromagnetic valve device according to any one of claims 1 to 8. ​

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