Bidirectional filter for high-flow delivery system of liquid rocket

Abstract

The utility model discloses a two-way filter for a liquid rocket high-flow conveying system, and relates to the technical field of spaceflight, the two-way filter comprises a two-way filter element, a lower adapter flange, an adapter pipe and an upper adapter flange; wherein the bidirectional filter element comprises an outer filter element and an inner filter element, an outer filter screen is arranged on the periphery of the outer filter element, an inner filter screen is arranged on the periphery of the inner filter element, and a top filter screen is arranged at one end of the inner filter element; the end, provided with the top filter screen, of the inner filter element is located in the outer filter element, and the other end of the inner filter element is connected with one end of the outer filter element; the other end of the outer filter element is placed on the lower adapter flange; the adapter tube is sleeved outside the filter element of the two-way filter, and one end of the adapter tube is connected with the other end of the outer filter element and the lower adapter flange into a whole; and the other end of the adapter tube is connected with the upper adapter flange. The novel liquid pipeline filtering structure without a sealing fastener structure is adopted, the filtering area can be increased under the equivalent pipeline diameter, and the pressure drop loss of a pipeline propellant is reduced.

Description

Technical Field

[0001] The present application relates to the field of aerospace technology, and in particular to a two-way filter for a large-flow delivery system of a liquid rocket. Background Art

[0002] A filter is a filtration device within the liquid rocket delivery system, used to control excess propellant in the rocket pipeline. Typically installed at the engine delivery pipe inlet, the filter ensures that the propellant entering the engine meets specified cleanliness requirements, preventing excess propellant from clogging the engine and potentially affecting liquid rocket flight.

[0003] The filter structure disclosed in the utility model patent application CN219399261U, entitled "A Rocket Liquid Oxygen Transport Filter and Rocket," is mounted on the flange's mating surface using fasteners, simplifying disassembly. However, due to the lack of anti-loosening measures, the fasteners in this filter structure are prone to dislodging in cryogenic liquids, entering the liquid pipeline and causing additional debris. Furthermore, the filter screen is a conical sintered mesh, which prevents a larger filtration area given the limited space in the pipeline.

[0004] Patent application CN113082890A, titled "High-Pressure, Low-Temperature Bidirectional Filter," proposes filtering high- and low-temperature fluids in pipelines by threading a filter element and a sealing ring between the pipe flange. However, the sealing ring material is susceptible to dissolution and failure in pipelines containing liquid oxygen, low-temperature gases, and oil-based media. Furthermore, during installation and use, debris from the sealing ring can easily fall into the pipeline, causing secondary contamination of the fluid, leading to engine blockage and ultimately flight failure.

[0005] Therefore, there is an urgent need to design a bidirectional filter for a liquid rocket high-flow delivery system to solve the defects of existing rocket filters in the propellant filtration process. Utility Model Content

[0006] The purpose of this application is to provide a bidirectional filter for a large-flow liquid rocket delivery system, which adopts a new structure for liquid pipeline filtration without a sealing fastener structure, and can increase the filtration area under the equivalent pipeline diameter and reduce the pressure drop loss of the pipeline propellant.

[0007] In order to achieve the above-mentioned purpose, the present application provides a two-way filter for a liquid rocket large-flow conveying system, comprising: a two-way filter element, a lower adapter flange, a transfer tube and an upper adapter flange; wherein, the two-way filter element comprises: an outer filter element with outer filter screens arranged on all sides, and an inner filter element with inner filter screens arranged on all sides, and a top filter screen is arranged on one end of the inner filter element; the end of the inner filter element with the top filter screen is located in the outer filter element, and the other end of the inner filter element is connected to one end of the outer filter element; the other end of the outer filter element is placed on the lower adapter flange; the transfer tube is sleeved on the outside of the two-way filter element, and one end of the transfer tube is connected to the other end of the outer filter element and the lower adapter flange as a whole; the other end of the transfer tube is connected to the upper adapter flange.

[0008] As above, the two-way filter element also includes a plurality of filter element reinforcement ribs; wherein, the plurality of filter element reinforcement ribs are evenly spaced between the outer filter element and the inner filter element, and one side of each filter element reinforcement rib is connected to the outer side of the inner filter element, and the other side of each filter element reinforcement rib is connected to the inner side of the outer filter element.

[0009] As above, the inner filter element includes: an inner filter element skeleton and a filter element skeleton top; wherein, one end of the inner filter element skeleton is connected to the filter element skeleton top; the other end of the inner filter element skeleton is connected to one end of the outer filter element; the inner filter net is arranged on the inner filter element skeleton; the top filter net is arranged on the filter element skeleton top.

[0010] As above, the outer filter element includes: a filter element outer skeleton; wherein, an outer filter element connector is provided at one end of the filter element outer skeleton, and the outer filter element connector is located on the inner side of the filter element outer skeleton, and is connected to the other end of the filter element inner skeleton through the outer filter element connector; a filter element conical boss is provided at the other end of the filter element outer skeleton, and the filter element conical boss is located on the outer side of the filter element outer skeleton, and is connected to one end of the transfer tube and the lower transfer flange through the filter element conical boss; the outer filter screen is provided on the filter element outer skeleton, and is located between the outer filter element connector and the filter element conical boss.

[0011] As above, a filter element weld forming groove is provided in the middle of the filter element conical boss, and the filter element conical boss, one end of the transfer tube and the lower transfer flange are welded together at the filter element weld forming groove.

[0012] As described above, a plurality of weld exhaust holes for discharging harmful gases during welding are evenly spaced in the weld forming groove of the filter element.

[0013] As above, the upper adapter flange includes: an upper adapter flange body and an upper adapter flange flange; the upper adapter flange flange is provided with a plurality of upper adapter flange fixing holes for fastening connection with the external pipeline; wherein, one end of the upper adapter flange body is connected to the upper adapter flange flange; the other end of the upper adapter flange body is connected to the other end of the adapter tube.

[0014] As described above, an upper transition flange sealing surface for flange sealing during transition is provided on the inner side of each upper transition flange fixing hole.

[0015] As above, the lower adapter flange includes: a lower adapter flange mounting seat, a lower adapter flange neck, a lower adapter flange main body, a lower adapter flange sealing surface and a lower adapter flange cover; wherein, one end of the lower adapter flange mounting seat is connected to one end of the lower adapter flange neck; the other end of the lower adapter flange mounting seat is connected to the conical boss of the filter element and one end of the adapter tube; the other end of the lower adapter flange neck is connected to one end of the lower adapter flange main body; the lower adapter flange sealing surface is arranged on the outside of the lower adapter flange main body and is close to the other end of the lower adapter flange main body. When connected to the pipeline, sealing is achieved through the lower adapter flange sealing surface; the lower adapter flange cover is arranged on the outside of the lower adapter flange main body, and the lower adapter flange cover is located between the lower adapter flange neck and the lower adapter flange sealing surface; a plurality of lower flange fixing holes are provided on the lower adapter flange cover, which is connected to the pipeline through the lower flange fixing holes.

[0016] As above, the other end of the transfer tube is provided with a docking groove, which is connected to the other end of the upper transfer flange body through the docking groove; a transfer tube boss is provided on the inner side of the transfer tube, and the transfer tube boss is close to one end of the transfer tube; when connected, the filter element conical boss is placed on the lower transfer flange mounting seat, and the other end of the lower transfer flange mounting seat is located at the filter element weld forming groove; after the transfer tube is sleeved on the outside of the two-way filter element, the lower side of the transfer tube boss is pressed against the upper side of the filter element conical boss, and one end of the transfer tube is located at the filter element weld forming groove; during welding, the molten pool of the weld flows and fills the filter element weld forming groove, thereby welding the filter element conical boss, the lower transfer flange mounting seat located at the filter element weld forming groove and one end of the transfer tube located at the filter element weld forming groove into one.

[0017] The beneficial effects achieved by this application are as follows:

[0018] (1) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application adopts a new structure of liquid pipeline filtration without a sealing fastener structure, which can increase the filtration area under the equivalent pipeline diameter and reduce the pressure drop loss of the pipeline propellant.

[0019] (2) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application proposes to add filter element reinforcement ribs between the outer filter element and the inner filter element, and to apply the filter mesh by resistance welding on the surface of the inner frame, the top of the filter element frame and the outer frame of the filter element, so that the filter element of the bidirectional filter is not easily deformed due to flow impact, thereby solving the problem of how to ensure the structural stability of the filter element.

[0020] (3) This application proposes a bidirectional filter for a high-flow liquid rocket delivery system. The proposed M-type filter element replaces the conical barrel filter element structure previously used in patents. This increases the filter area by 30% to 40% compared to filters of the same height, thereby increasing the flow area of ​​the medium, reducing the pressure drop of the liquid in the pipeline, and increasing the liquid flow rate. This solves the problem of increasing the filter flow area within a limited pipeline space.

[0021] (4) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application is designed with a conical boss structure on the filter element and adopts an external weld fastening and sealing method, which reduces the use of fasteners and seals in the filter and increases the structural reliability. Compared with the previous patented design, it solves the problem of how to prevent the filter fasteners and seals from falling and entering by mistake. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic structural diagram of an embodiment of a two-way filter for a liquid rocket high-flow delivery system;

[0024] Figure 2 This is a schematic structural diagram of an embodiment of a two-way filter element;

[0025] Figure 3 An exploded view of an embodiment of a bidirectional filter for a large-flow delivery system of a liquid rocket. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-3As shown, the present application provides a two-way filter for a liquid rocket high-flow delivery system, comprising: a two-way filter element 1, a lower adapter flange 2, a transfer pipe 3 and an upper adapter flange 4. The two-way filter element 1 comprises: an outer filter element 12 with an outer filter screen 11 arranged on all sides, and an inner filter element 14 with an inner filter screen 13 arranged on all sides, and a top filter screen is arranged at one end of the inner filter element 14. The end of the inner filter element 14 with the top filter screen is located inside the outer filter element 12, and the other end of the inner filter element 14 is connected to one end of the outer filter element 12. The other end of the outer filter element 12 is placed on the lower adapter flange 2. The transfer pipe 3 is sleeved on the outside of the two-way filter element 1, and one end of the transfer pipe 3 is connected to the other end of the outer filter element 12 and the lower adapter flange 2 as a whole. The other end of the transfer pipe 3 is connected to the upper adapter flange 4.

[0028] Furthermore, the two-way filter element 1 further includes a plurality of filter element reinforcement ribs 15. The plurality of filter element reinforcement ribs 15 are evenly spaced between the outer filter element 12 and the inner filter element 14, and one side of each filter element reinforcement rib 15 is connected to the outer side of the inner filter element 14, and the other side of each filter element reinforcement rib 15 is connected to the inner side of the outer filter element 12.

[0029] Specifically, a filter element reinforcement rib 15 is provided in the two-way filter element 1 to improve the structural stability between the outer filter element 12 and the inner filter element 14 .

[0030] Furthermore, the filter element reinforcement rib 15 is welded to the outer filter element 12 and the inner filter element 14, but is not limited to welding. Welding is preferred in this application.

[0031] Furthermore, the specific number of the filter element reinforcement ribs 15 is set according to actual conditions, and the preferred number in this application is four.

[0032] Furthermore, as an embodiment, the filter element reinforcement rib 15 is a reinforcement plate, one side of the reinforcement plate is connected to the outer side of the inner filter element 14 ; the other side of the reinforcement plate is connected to the inner side of the outer filter element 12 .

[0033] The specific shape of the reinforcing plate is set according to actual conditions, and the preferred shape in this application is trapezoidal.

[0034] Furthermore, as another embodiment, the filter element reinforcement rib 15 includes: a frame 151 and at least one reinforcement rib 152; the opposite ends of each reinforcement rib 152 are respectively connected to the inner sides of the opposite ends of the frame 151; the outer side of one end of the frame 151 is connected to the outer side of the inner filter element 14; and the outer side of the other end of the frame 151 is connected to the inner side of the outer filter element 12.

[0035] Specifically, the specific shape of the frame 151 is set according to actual conditions, and the preferred shape in this application is a trapezoid. The specific number of the reinforcement ribs 152 is set according to actual conditions, and the preferred shape in this application is two, with two reinforcement ribs 152 spaced apart in the frame 151.

[0036] Further, such as Figure 2 and 3 As shown, the inner filter element 14 includes an inner filter frame 141 and a top filter frame 142. One end of the inner filter frame 141 is connected to the top filter frame 142. The other end of the inner filter frame 141 is connected to one end of the outer filter element 12. The inner filter screen 13 is mounted on the inner filter frame 141. The top filter screen is mounted on the top filter frame 142.

[0037] Furthermore, the inner filter 13 is arranged inside the filter element inner skeleton 141, but is not limited to being arranged inside the filter element inner skeleton 141, and can also be arranged outside the filter element inner skeleton 141. The present application preferably arranges the inner filter 13 inside the filter element inner skeleton 141.

[0038] Furthermore, the inner filter screen 13 is welded to the inner frame 141 of the filter element, but is not limited to welding. Welding is preferred in this application.

[0039] Furthermore, the specific type of the inner filter 13 is set according to actual conditions, and the present application preferably uses a dense woven mesh of the standard HB1862-93.

[0040] Furthermore, the top filter is arranged inside the top 142 of the filter element skeleton, but is not limited to being arranged inside the top 142 of the filter element skeleton, and can also be arranged outside the top 142 of the filter element skeleton. The present application preferably arranges the top filter inside the top 142 of the filter element skeleton.

[0041] Furthermore, the specific type of the top filter is set according to actual conditions, and this application preferably uses a dense woven mesh with a standard of HB1862-93.

[0042] Furthermore, an inner filter element connector 143 is provided at the other end of the filter element inner skeleton 141 , and the inner filter element connector 143 is located outside the filter element inner skeleton 141 and is connected to one end of the outer filter element 12 through the inner filter element connector 143 .

[0043] Specifically, the filter core inner frame 141 and the inner filter core connector 143 are an integrated structure or a separate structure. When the filter core inner frame 141 and the inner filter core connector 143 are separate structures, the filter core inner frame 141 and the inner filter core connector 143 are welded, but not limited to welding. Welding is preferred in this application.

[0044] Furthermore, the filter core inner frame 141 is in a conical trapezoidal shape, but is not limited to a conical trapezoidal shape. The diameter of one end of the filter core inner frame 141 provided with the inner filter core connector 143 is larger than the diameter of the end of the filter core inner frame 141 connected to the filter core frame top 142.

[0045] Furthermore, the filter element inner frame 141 is composed of a plurality of cross-shaped frames.

[0046] Specifically, the specific number of the skeletons constituting the filter core inner skeleton 141 is set according to the actual situation. The specific shape of the skeletons constituting the filter core inner skeleton 141 is set according to the actual situation, and the present application preferably uses a cross shape.

[0047] Furthermore, the filter element skeleton top 142 is a planar structure, but is not limited to a planar structure. The present application preferably adopts a planar structure.

[0048] Further, such as Figure 2 and 3 As shown, the outer filter element 12 includes: a filter element outer frame 121. Among them, an outer filter element connector 122 is provided at one end of the filter element outer frame 121, and the outer filter element connector 122 is located on the inner side of the filter element outer frame 121, and is connected to the other end of the filter element inner frame 141 through the outer filter element connector 122. A filter element conical boss 123 is provided at the other end of the filter element outer frame 121, and the filter element conical boss 123 is located on the outer side of the filter element outer frame 121, and is connected to one end of the adapter tube 3 and the lower adapter flange 2 through the filter element conical boss 123. The outer filter screen 11 is provided on the filter element outer frame 121 and is located between the outer filter element connector 122 and the filter element conical boss 123.

[0049] Specifically, the two-way filter element 1 of the present application is provided with an inner filter element skeleton 141 and an outer filter element skeleton 121, and four sets of filter element reinforcement ribs 15 are provided between the inner filter element 14 and the outer filter element 12. The bottom of the two-way filter element 1 is designed with a filter element conical boss 123, which can be mounted on the lower adapter flange 2. By welding the adapter tube 3 to the outside of the lower adapter flange 2, the two-way filter element 1 is fixed to the middle of the two-way filter for the liquid rocket high-flow delivery system, which can reduce the deformation of the two-way filter for the liquid rocket high-flow delivery system under the forward and reverse flushing of the pipeline liquid.

[0050] The cross-section of the two-way filter element 1 is an M-shaped structure, but is not limited to the M-shaped structure. The present application preferably adopts an M-shaped structure, and the outer filter screen 11 is applied to the outer frame 121 of the filter element by resistance welding, the inner filter screen 13 is applied to the inner frame 141 of the filter element by resistance welding, and the top filter screen is applied to the top 142 of the filter element frame by resistance welding; in filters of the same height, this structure increases the filter area by 30% to 40%, increases the medium flow area, reduces the pipeline liquid pressure drop, and increases the liquid flow rate.

[0051] Furthermore, the outer filter 11 is arranged inside or outside the filter element outer skeleton 121. In the present application, the outer filter 11 is preferably arranged inside the filter element outer skeleton 121.

[0052] Furthermore, the outer filter screen 11 and the filter element outer frame 121 are welded, but not limited to welding. Welding is preferred in this application.

[0053] Furthermore, the specific type of the outer filter 11 is set according to actual conditions, and the present application preferably uses a dense woven mesh of the standard HB1862-93.

[0054] Furthermore, the outer filter element connector 122 and the filter element outer frame 121 are an integrated structure or a separate structure. When the outer filter element connector 122 and the filter element outer frame 121 are a separate structure, the outer filter element connector 122 and the filter element outer frame 121 are welded, but are not limited to welding. The present application preferably uses welding.

[0055] Further, as an embodiment, the inner filter element connector 143 is connected to the outer filter element connector 122 .

[0056] Furthermore, the inner filter element connector 143 is welded to the outer filter element connector 122, but is not limited to welding. Welding is preferred in this application.

[0057] Furthermore, the filter core outer frame 121 and the filter core conical boss 123 are an integrated structure or a separate structure. When the filter core outer frame 121 and the filter core conical boss 123 are a separate structure, the filter core outer frame 121 and the filter core conical boss 123 are welded, but not limited to welding. Welding is preferred in this application.

[0058] Furthermore, the filter core outer frame 121 is in a conical trapezoidal shape, but is not limited to a conical trapezoidal shape. The diameter of one end of the filter core outer frame 121 provided with the outer filter core connector 122 is smaller than the diameter of one end of the filter core outer frame 121 provided with the filter core conical boss 123.

[0059] Furthermore, the filter element outer frame 121 is composed of a plurality of cross-shaped frames.

[0060] Specifically, the specific number of the skeletons constituting the filter element outer skeleton 121 is set according to the actual situation. The specific shape of the skeletons constituting the filter element outer skeleton 121 is set according to the actual situation, and the present application preferably uses a cross shape.

[0061] Furthermore, a filter element weld forming groove 124 is provided in the middle of the filter element conical boss 123 , and the filter element conical boss 123 , one end of the adapter tube 3 and the lower adapter flange 2 are welded together at the filter element weld forming groove 124 .

[0062] Specifically, the cross section of the filter element conical boss 123 provided with the filter element weld forming groove 124 is C-shaped, which is convenient for the molten pool of the weld to flow and fill.

[0063] Furthermore, the connection method between the filter element conical boss 123, one end of the adapter tube 3 and the lower adapter flange 2 is not limited to welding, and welding is preferred in this application.

[0064] Furthermore, a plurality of weld exhaust holes 125 for discharging harmful gases during welding are evenly spaced apart in the weld forming groove 124 of the filter element.

[0065] Specifically, the specific number of weld vent holes 125 is set according to actual conditions. A plurality of weld vent holes 125 are evenly distributed on the filter element weld forming groove 124. During welding, harmful gases generated during welding can be discharged in time through the weld vent holes 125 to prevent the formation of weld defects such as pores and cracks.

[0066] Furthermore, upper adapter flange 4 comprises an upper adapter flange body 41 and an upper adapter flange flange 42. Upper adapter flange flange 42 is provided with a plurality of upper adapter flange fixing holes 421 for fastening to external piping. One end of upper adapter flange body 41 is connected to upper adapter flange flange 42. The other end of upper adapter flange body 41 is connected to the other end of adapter tube 3.

[0067] Furthermore, an upper transition flange sealing surface for flange sealing during transition is provided on the inner side of each upper transition flange fixing hole 421 .

[0068] Furthermore, the upper adapter flange 4 also includes an upper adapter flange sealing surface 43; the upper adapter flange sealing surface 43 is arranged on the inner side of the upper adapter flange flange 42, and when the upper adapter flange 4 is fastened to the external pipeline, sealing is achieved through the upper adapter flange sealing surface 43.

[0069] Furthermore, the lower adapter flange 2 includes a lower adapter flange mounting base 21, a lower adapter flange neck 22, a lower adapter flange body 23, a lower adapter flange sealing surface 24, and a lower adapter flange cover 25. One end of the lower adapter flange mounting base 21 is connected to one end of the lower adapter flange neck 22; the other end of the lower adapter flange mounting base 21 is connected to the filter element conical boss 123 and one end of the adapter tube 3. The other end of the lower adapter flange neck 22 is connected to one end of the lower adapter flange body 23. The lower adapter flange sealing surface 24 is located outside the lower adapter flange body 23 and is close to the other end of the lower adapter flange body 23. When connected to a pipeline, the lower adapter flange sealing surface 24 achieves a seal. The lower adapter flange cover 25 is arranged on the outside of the lower adapter flange body 23, and the lower adapter flange cover 25 is located between the lower adapter flange neck 22 and the lower adapter flange sealing surface 24; the lower adapter flange cover 25 is provided with multiple lower flange fixing holes 251, and is connected to the pipeline through the lower flange fixing holes 251.

[0070] Specifically, the specific number of the lower flange fixing holes 251 is set according to actual conditions. The lower flange fixing holes 251 are connected to other pipelines by fastening with bolts.

[0071] Furthermore, the other end of the adapter tube 3 is provided with a butt-jointed groove, which connects to the other end of the upper adapter flange body 41 via the butt-jointed groove. A adapter tube boss 31 is provided on the inner side of the adapter tube 3, and is located near one end of the adapter tube 3. During connection, the filter element conical boss 123 is placed on the lower adapter flange mounting seat 21, and the other end of the lower adapter flange mounting seat 21 is located in the filter element weld groove 124. After the adapter tube 3 is sleeved onto the exterior of the two-way filter element 1, the lower side of the adapter tube boss 31 is pressed against the upper side of the filter element conical boss 123, and one end of the adapter tube 3 is located in the filter element weld groove 124. During welding, the molten pool of the weld flows and fills the filter element weld groove 124, thereby welding the filter element conical boss 123, the lower adapter flange mounting seat 21 located in the filter element weld groove 124, and the one end of the adapter tube 3 located in the filter element weld groove 124 into a single body.

[0072] Specifically, the adapter tube 3 is a cylindrical structure, but is not limited to a cylindrical structure. The present application preferably adopts a cylindrical structure. The adapter tube 3 is welded to the outer circular weld where it contacts the lower adapter flange 2 to form a whole. The upper adapter flange 4 and the adapter tube 3 are coaxially welded to form a whole.

[0073] Furthermore, the cross section of the transfer tube boss 31 is a trapezoid, but is not limited to a trapezoid, and is preferably a trapezoid in the present application. The transfer tube boss 31 provides an axial fixing force to the two-way filter element 1 .

[0074] Specifically, the two-way filter element 1 is cut and welded, undergoing pickling and degreasing steps before welding. Finally, the two-way filter element 1 is first mounted on the lower adapter flange mounting seat 21 of the lower adapter flange 2. The adapter tube boss 31 of the adapter tube 3 is then pressed onto the conical filter element boss 123 of the two-way filter element 1. A girth weld is then performed at the outer circular weld where the adapter tube 3 contacts the lower adapter flange 2. The two-way filter used in the high-flow liquid rocket delivery system is entirely constructed of the same metal, without components such as fasteners and seals, reducing the possibility of waste during processing and use.

[0075] The beneficial effects achieved by this application are as follows:

[0076] (1) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application adopts a new structure of liquid pipeline filtration without a sealing fastener structure, which can increase the filtration area under the equivalent pipeline diameter and reduce the pressure drop loss of the pipeline propellant.

[0077] (2) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application proposes to add filter element reinforcement ribs between the outer filter element and the inner filter element, and to apply the filter mesh by resistance welding on the surface of the inner frame, the top of the filter element frame and the outer frame of the filter element, so that the filter element of the bidirectional filter is not easily deformed due to flow impact, thereby solving the problem of how to ensure the structural stability of the filter element.

[0078] (3) This application proposes a bidirectional filter for a high-flow liquid rocket delivery system. The proposed M-type filter element replaces the conical barrel filter element structure previously used in patents. This increases the filter area by 30% to 40% compared to filters of the same height, thereby increasing the flow area of ​​the medium, reducing the pressure drop of the liquid in the pipeline, and increasing the liquid flow rate. This solves the problem of increasing the filter flow area within a limited pipeline space.

[0079] (4) The bidirectional filter for the large-flow delivery system of liquid rockets of the present application is designed with a conical boss structure on the filter element and adopts an external weld fastening and sealing method, which reduces the use of fasteners and seals in the filter and increases the structural reliability. Compared with the previous patented design, it solves the problem of how to prevent the filter fasteners and seals from falling and entering by mistake.

[0080] Although preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the underlying inventive concepts. Therefore, the scope of protection of this application is intended to include the preferred embodiments and all changes and modifications that fall within the scope of this application. Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if such changes and modifications of this application fall within the scope of protection of this application and its equivalents, then this application is intended to include such changes and modifications.

Claims

1. A two-way filter for a liquid rocket high-flow delivery system, characterized in that: include: Two-way filter element, lower adapter flange, adapter tube and upper adapter flange; The two-way filter element includes: an outer filter element with an outer filter screen arranged around it, and an inner filter element with an inner filter screen arranged around it, and a top filter screen is arranged at one end of the inner filter element; One end of the inner filter element with a top filter screen is located inside the outer filter element, and the other end of the inner filter element is connected to one end of the outer filter element; The other end of the outer filter element is placed on the lower adapter flange; The transfer tube is sleeved on the outside of the two-way filter element, and one end of the transfer tube is connected to the other end of the outer filter element and the lower transfer flange as a whole; The other end of the transfer tube is connected to the upper transfer flange.

2. The two-way filter for a liquid rocket high-flow delivery system according to claim 1, characterized in that: The two-way filter element also includes a plurality of filter element reinforcement ribs; Among them, multiple filter element reinforcement ribs are evenly spaced between the outer filter element and the inner filter element, and one side of each filter element reinforcement rib is connected to the outer side of the inner filter element, and the other side of each filter element reinforcement rib is connected to the inner side of the outer filter element.

3. The two-way filter for a liquid rocket high-flow delivery system according to claim 2, characterized in that: The inner filter element includes: the inner filter element frame and the filter element frame top; Wherein, one end of the filter element inner frame is connected to the top of the filter element frame; The other end of the filter element inner frame is connected to one end of the outer filter element; The inner filter is arranged on the inner frame of the filter element; The top filter screen is arranged on the top of the filter element frame.

4. The two-way filter for a liquid rocket high-flow delivery system according to claim 3, characterized in that: The outer filter element includes: filter element outer frame; One end of the filter core outer frame is provided with an outer filter core connector, and the outer filter core connector is located on the inner side of the filter core outer frame and is connected to the other end of the filter core inner frame through the outer filter core connector; The other end of the filter element outer frame is provided with a filter element conical boss, and the filter element conical boss is located outside the filter element outer frame, and is connected to one end of the transfer tube and the lower transfer flange through the filter element conical boss. The outer filter screen is arranged on the outer frame of the filter element and is located between the outer filter element connector and the conical boss of the filter element.

5. The two-way filter for a liquid rocket high-flow delivery system according to claim 4, characterized in that: A filter element weld forming groove is provided in the middle of the filter element conical boss, and the filter element conical boss, one end of the transfer tube and the lower transfer flange are welded into one at the filter element weld forming groove.

6. The two-way filter for a liquid rocket high-flow delivery system according to claim 5, characterized in that: A plurality of weld exhaust holes for discharging harmful gases during welding are evenly spaced in the weld forming groove of the filter element.

7. The two-way filter for a liquid rocket high-flow delivery system according to claim 6, characterized in that: The upper adapter flange includes: an upper adapter flange body and an upper adapter flange flange; the upper adapter flange flange is provided with a plurality of upper adapter flange fixing holes for fastening and connecting with external pipelines; Wherein, one end of the upper adapter flange body is connected to the upper adapter flange flange; The other end of the upper adapter flange body is connected to the other end of the adapter tube.

8. The two-way filter for a liquid rocket high-flow delivery system according to claim 7, characterized in that: An upper transition flange sealing surface for flange sealing during transition is provided on the inner side of each upper transition flange fixing hole.

9. The two-way filter for a liquid rocket high-flow delivery system according to claim 8, characterized in that: The lower adapter flange includes: a lower adapter flange mounting seat, a lower adapter flange neck, a lower adapter flange body, a lower adapter flange sealing surface and a lower adapter flange cover; Among them, one end of the lower adapter flange mounting seat is connected to the necked end of the lower adapter flange; the other end of the lower adapter flange mounting seat is connected to the conical boss of the filter element and one end of the adapter tube; The other end of the necked lower adapter flange is connected to one end of the lower adapter flange body; The lower adapter flange sealing surface is arranged on the outer side of the lower adapter flange body and close to the other end of the lower adapter flange body. When connected to the pipeline, sealing is achieved through the lower adapter flange sealing surface. The lower adapter flange cover is arranged on the outside of the lower adapter flange body, and the lower adapter flange cover is located between the lower adapter flange neck and the lower adapter flange sealing surface; the lower adapter flange cover is provided with multiple lower flange fixing holes, and is connected to the pipeline through the lower flange fixing holes.

10. The two-way filter for a liquid rocket high-flow delivery system according to claim 9, characterized in that: The other end of the transfer tube is provided with a butt groove, which is connected to the other end of the upper transfer flange body through the butt groove; A transfer tube boss is provided on the inner side of the transfer tube, and the transfer tube boss is close to one end of the transfer tube; During connection, the conical boss of the filter element is placed on the lower adapter flange mounting seat, and the other end of the lower adapter flange mounting seat is located at the filter element weld forming groove; after the adapter tube is sleeved onto the outside of the two-way filter element, the lower side of the adapter tube boss is pressed tightly against the upper side of the conical boss of the filter element, and one end of the adapter tube is located at the filter element weld forming groove; During welding, the molten pool of the weld flows and fills the filter element weld forming groove, thereby welding the filter element conical boss, the lower adapter flange mounting seat located at the filter element weld forming groove and one end of the adapter tube located at the filter element weld forming groove into one.

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