A quick-release filter core filter for a liquid rocket engine low-temperature high-pressure test system

Abstract

The application discloses a quick-release filter element filter for a liquid rocket engine low-temperature high-pressure test system, which comprises an inlet / outlet flange, an inlet / outlet fastener, an inlet / outlet flange gasket, a shell, a stainless steel filter screen assembly, a lower sealing gasket, a filter element, an upper sealing gasket, a gland sealing gasket, a gland and a gland screw; a stepped hole is formed in the short-shaft direction of the shell; the inlet / outlet flange is installed on the medium inlet / outlet end of the shell through the inlet / outlet fastener; the inlet / outlet flange gasket is arranged between the inlet / outlet flange and the shell; the filter element is installed in the stepped hole of the shell and is packaged through the gland and the gland screw; the lower sealing gasket and the upper sealing gasket are arranged between the filter element and the shell, and the gland sealing gasket is arranged between the gland and the shell; and the stainless steel filter screen assembly is welded to the outside of the filter element. The quick-release filter element filter solves the problems of filter element damage caused by high-pressure difference impact and test termination caused by ice blocking.

Description

Technical Field

[0001] This invention belongs to the field of cryogenic high-pressure testing technology, and particularly relates to a quick-release filter element for a cryogenic high-pressure testing system for liquid rocket engines. Background Technology

[0002] Aerospace products are highly sensitive to foreign matter. Therefore, cryogenic testing systems typically employ multiple axial-flow cryogenic filters to prevent foreign matter from entering the test product. These filters also require regular disassembly, cleaning, and inspection. However, with the advancements in aerospace and other fields towards deep space and high-thrust applications, the testing pressures for cryogenic components have significantly increased. This has led to two problems with cryogenic filters in testing systems: First, the filter screens may break under the impact of high-pressure, high-flow-rate media, allowing foreign matter to enter the test product. Second, high pressure differentials cause ice crystals and other foreign matter in the medium to rapidly adhere to the filter screen surface, resulting in filter blockage. This prevents the test pressure from reaching the required level, necessitating test termination and subsequent disassembly and cleaning of the filter element after the system returns to room temperature, thus impacting the test schedule. Therefore, conventional axial-flow cryogenic filters are no longer sufficient to meet the requirements of high-pressure, high-flow-rate, and high-efficiency testing. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a quick-release filter element for a cryogenic high-pressure test system for liquid rocket engines, aiming to solve the problems of filter element damage caused by high pressure differential impact and test termination caused by ice blockage.

[0004] To solve the above-mentioned technical problems, the present invention discloses a quick-release filter element for a cryogenic high-pressure test system for liquid rocket engines, comprising: an inlet flange, an inlet fastener, an inlet flange gasket, a housing, a stainless steel filter screen assembly, a lower sealing gasket, a filter element, an upper sealing gasket, a gland sealing gasket, a gland, a gland screw, an outlet flange, an outlet fastener, and an outlet flange gasket.

[0005] The shell has a medium inlet and a medium outlet at both ends along its long axis; a stepped hole is machined along its short axis; an inlet flow channel and an outlet flow channel are provided inside the shell; the inlet flow channel is inclined downward, with one end connected to the medium inlet and the other end connected to the lower part of the stepped hole; the outlet flow channel is connected to the upper part of the stepped hole and extends horizontally along the axis of the medium outlet.

[0006] The inlet flange is installed at the medium inlet end of the shell using inlet fasteners; the outlet flange is installed at the medium outlet end of the shell using outlet fasteners; wherein, an inlet flange gasket is provided between the inlet flange and the shell, and an outlet flange gasket is provided between the outlet flange and the shell.

[0007] The filter element is installed in the stepped hole of the housing and sealed in the stepped hole of the housing by a gland and gland screws; a lower sealing gasket and an upper sealing gasket are provided between the filter element and the housing; a gland sealing gasket is provided between the gland and the housing; a stainless steel filter screen assembly is welded to the outside of the filter element.

[0008] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the filter element has a barrel-shaped structure; the upper part of the barrel-shaped structure is a cylinder, and the lower part is an elliptical cylinder.

[0009] The cross-section of the elliptical cylinder is elliptical, and the major axis of the ellipse is parallel to the inlet and outlet axes of the medium. Several medium inflow holes are evenly distributed on the side of the elliptical cylinder. The 62° included side of the elliptical cylinder facing the inlet flow channel serves as the flow-facing surface of the filter element, and no medium inflow holes are machined there.

[0010] The cylinder has several media outlet holes evenly distributed on its side, and the media outlet holes are oblong holes; the bottom of the cylinder is provided with a filter element installation guide surface, which is used to control the radial relative position of the filter element and the housing; when inserting the filter element into the stepped hole of the housing, it is necessary to ensure that when viewed from the inlet flow channel direction, the flow-facing surface of the filter element is completely aligned with the inlet flow channel.

[0011] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the total area of ​​the medium outflow hole and the medium inflow hole is more than 4 times the area of ​​the flow channel.

[0012] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the stainless steel filter screen assembly has a two-layer structure. The inner layer is the filter screen skeleton, and the outer layer is the filter screen that meets the filtration accuracy required for the test. The filter screen skeleton and the filter screen are welded to the outside of the elliptical cylinder of the filter element by electron beam welding. The circumferential welding positions of the stainless steel filter screen assembly and the filter element are located at the upper and lower ends of the elliptical cylinder of the filter element and at the middle position of the airflow-facing surface of the filter element.

[0013] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the upper sealing gasket is installed in the upper sealing gasket sealing groove inside the housing; the lower sealing gasket is installed in the lower sealing gasket sealing groove on the filter element; wherein, when the filter element with the lower sealing gasket installed is inserted into the stepped hole of the housing with the upper sealing gasket installed, the lower sealing gasket contacts the lower sealing gasket sealing boss surface inside the housing, and the upper sealing gasket contacts the upper sealing gasket sealing boss surface on the filter element.

[0014] In the quick-release filter element of the aforementioned liquid rocket engine cryogenic high-pressure test system, the gland is provided with a gland sealing gasket sealing groove, a gland mounting guide surface, and a gland screw mounting hole; wherein, the gland sealing gasket is installed in the gland sealing gasket sealing groove; the gland mounting guide surface is used to control the radial relative position between the gland and the shell; the gland screw passes through the gland screw mounting hole, is screwed into the gland mounting threaded hole on the top of the shell, and is tightened; when the gland with the gland sealing gasket is installed and fixed to the top of the shell by the gland screw, the gland sealing gasket contacts the gland sealing gasket sealing boss surface on the filter element.

[0015] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the shell is in the shape of a cuboid with flow direction markings on the surface; the shell adopts a lightweight design and weight reduction holes are provided in the parts without flow channels and stepped holes.

[0016] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, the medium inlet and medium outlet are coaxially arranged; the inlet flow channel and the outlet flow channel are arranged at a 32° angle.

[0017] In the quick-release filter element of the aforementioned liquid rocket engine cryogenic high-pressure test system, the medium inlet end of the shell is provided with an inlet sealing gasket sealing groove and an inlet fastener mounting hole, and the medium outlet end of the shell is provided with an outlet sealing gasket sealing groove and an outlet fastener mounting hole; wherein, the inlet flange gasket is installed in the inlet sealing gasket sealing groove, and the inlet fastener is used to install the inlet flange at the medium inlet end of the shell through the inlet fastener mounting hole; the outlet flange gasket is installed in the outlet sealing gasket sealing groove, and the outlet fastener is used to install the outlet flange at the medium outlet end of the shell through the outlet fastener mounting hole.

[0018] In the quick-release filter element of the above-mentioned liquid rocket engine cryogenic high-pressure test system, a filter fixing threaded hole is provided at the bottom of the housing; wherein, the quick-release filter element is connected to the cryogenic medium input pipeline and the cryogenic medium output pipeline through the inlet flange and the outlet flange respectively, and is installed and fixed to other equipment through the filter fixing threaded hole.

[0019] The present invention has the following advantages:

[0020] (1) This invention discloses a quick-release filter element for a low-temperature and high-pressure test system for liquid rocket engines. After multiple tests in the low-temperature and high-pressure test system, it can effectively filter out excess substances in the medium and has the function of quick filter element replacement.

[0021] (2) This invention discloses a quick-release filter element for a cryogenic high-pressure test system of a liquid rocket engine. The medium inlet and medium outlet are coaxially arranged, allowing installation at any position in existing pipelines without altering the existing cryogenic pipeline system routing. Simulation verification shows that the flow resistance of the quick-release filter element described in this invention is basically consistent with that of existing filters.

[0022] (3) The present invention discloses a quick-release filter element for a cryogenic high-pressure test system for liquid rocket engines. The filter element is installed perpendicular to the flow channel, and the filter element can be quickly replaced through the pressure cap without removing the casing from the cryogenic pipeline system.

[0023] (4) This invention discloses a quick-release filter element for a low-temperature high-pressure test system for liquid rocket engines. The structural design of multiple sealing gaskets with different compression amounts allows the gland to press multiple sealing gaskets at once, and each sealing gasket reaches a preset sealing pressure, thereby achieving convenient assembly and quick disassembly.

[0024] (5) The present invention discloses a quick-release filter element for a low-temperature high-pressure test system for liquid rocket engines. The lower half of the filter element adopts an elliptical cross-section design, with the major axis of the ellipse parallel to the inlet and outlet axes. This can reduce the scouring area of ​​the filter element surface by the high-pressure medium, significantly increase the service life of the filter element, and reduce flow resistance.

[0025] (6) This invention discloses a quick-release filter element for a low-temperature high-pressure test system for liquid rocket engines. The lower half of the filter element has no holes facing the inlet flow channel. As the flow-facing surface of the filter element, it can prevent the high-pressure medium from impacting the stainless steel filter screen assembly, reduce the damage to the stainless steel filter screen assembly, and significantly improve the service life of the filter element.

[0026] (7) This invention discloses a quick-release filter element for a low-temperature high-pressure test system for liquid rocket engines. The housing adopts a planar structure and sealing groove design at the medium inlet and outlet positions. It can be customized to be a pipe joint connection or a flange connection according to the low-temperature test pipeline connection form. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a quick-release filter element for a cryogenic high-pressure test system for a liquid rocket engine, according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the filter element in one direction in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the filter element from another direction in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a shell according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of a pressure cap according to an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Reference Figures 1-5 In this embodiment, the quick-release filter element of the liquid rocket engine cryogenic high-pressure test system includes: an inlet flange 1, an inlet fastener 2, an inlet flange gasket 3, a housing 4, a stainless steel filter screen assembly 5, a lower sealing gasket 6, a filter element 7, an upper sealing gasket 8, a gland sealing gasket 9, a gland 10, a gland screw 11, an outlet flange 12, an outlet fastener 13, and an outlet flange gasket 14.

[0034] The housing 4 has a medium inlet and a medium outlet at both ends along its long axis, and the medium inlet and medium outlet are coaxially arranged.

[0035] The housing has stepped holes machined along its short axis for mounting the gland, upper sealing gasket, filter element, etc.

[0036] The housing 4 is provided with an inlet channel 41 and an outlet channel 47, which are arranged at a 32° angle. The inlet channel 41 is inclined downward, with one end connected to the medium inlet and the other end connected to the lower part of the stepped hole; the outlet channel 47 is connected to the upper part of the stepped hole and extends horizontally in the direction of the medium outlet axis.

[0037] The inlet flange 1 is installed at the medium inlet end of the housing 4 via the inlet fastener 2, and the outlet flange 12 is installed at the medium outlet end of the housing 4 via the outlet fastener 13. An inlet flange gasket 3 is provided between the inlet flange 1 and the housing 4, and an outlet flange gasket 14 is provided between the outlet flange 12 and the housing 4.

[0038] The filter element 7 is installed in the stepped hole of the housing 4 and is sealed in the stepped hole of the housing 4 by the gland 10 and the gland screw 11. A lower sealing gasket 6 and an upper sealing gasket 8 are provided between the filter element 7 and the housing 4, and a gland sealing gasket 9 is provided between the gland 10 and the housing 4.

[0039] The stainless steel filter assembly 5 is welded to the outside of the filter element 7.

[0040] In this embodiment, the housing 4 has an overall rectangular parallelepiped structure with flow direction markings engraved on its surface. The housing 4 adopts a lightweight design, with thinning and weight reduction measures implemented in areas without flow channels and stepped holes (e.g., weight reduction holes 51 are provided). The bottom of the housing 4 is provided with a filter fixing threaded hole 50, which is used to fix the quick-release filter cartridge when necessary, for example, fixing the quick-release filter cartridge to the bracket through the filter fixing threaded hole 50.

[0041] In this embodiment, the filter element 7 has a barrel-shaped structure; the upper part of the barrel-shaped structure is cylindrical, and the lower part is elliptical. The elliptical cylinder has an elliptical cross-section, with its major axis parallel to the media inlet and outlet axes. Several media inlet holes 78 are evenly distributed on the side of the elliptical cylinder. The 62° angled side of the elliptical cylinder facing the inlet channel 41 serves as the filter element's flow-facing surface 71, where the media inlet holes 78 are not machined. Several media outlet holes 75 are evenly distributed on the side of the cylinder, and these outlet holes 75 are elongated holes. A filter element mounting guide surface 74 is provided at the bottom of the cylinder to control the radial relative position of the filter element 7 and the housing 4. When inserting the filter element 7 into the stepped hole of the housing 4, it must be ensured that, viewed from the inlet channel 41, the filter element's flow-facing surface 71 is completely aligned with the inlet channel 41. Preferably, the total area of ​​the media outlet holes and the media inlet holes is more than four times the area of ​​the channel.

[0042] In this embodiment, the stainless steel filter assembly 5 has a two-layer structure, with an inner layer being a filter skeleton and an outer layer being a filter that meets the required filtration accuracy for the test. The filter skeleton and the filter are welded to the outer side of the elliptical cylinder of the filter element 7 using electron beam welding. The circumferential welding position 72 between the stainless steel filter assembly 5 and the filter element 7 is located at the upper and lower ends of the elliptical cylinder of the filter element 7 and at the middle position of the flow-facing surface 71 of the filter element.

[0043] In this embodiment, the upper sealing gasket 8 is installed in the upper sealing gasket sealing groove 45 inside the housing 4, and the lower sealing gasket 6 is installed in the lower sealing gasket sealing groove 73 on the filter element 7. When the filter element 7 with the lower sealing gasket 6 installed is inserted into the stepped hole of the housing 4 with the upper sealing gasket 8 installed, the lower sealing gasket 6 contacts the lower sealing gasket sealing boss surface 44 inside the housing 4, and the upper sealing gasket 8 contacts the upper sealing gasket sealing boss surface 76 on the filter element 7. The gland 10 is provided with a gland sealing gasket sealing groove 101, a gland mounting guide surface 102, and a gland screw mounting hole 103. The gland sealing gasket 9 is installed in the gland sealing gasket sealing groove 101. The gland mounting guide surface 102 is used to control the radial relative position between the gland 10 and the housing 4. The gland screw 11 passes through the gland screw mounting hole 103 and is screwed into the gland mounting threaded hole 46 on the top of the housing 4 and tightened. When the gland 10 with the gland sealing gasket 9 is installed and fixed to the top of the housing 4 by the gland screw 11, the gland sealing gasket 9 contacts the gland sealing gasket sealing boss surface 77 on the filter element 7. The sealing structure at the lower sealing gasket and the gland sealing gasket is a tenon and groove structure, and the sealing structure at the upper sealing gasket is a semi-tenon and groove structure. The compression of each sealing gasket can be controlled by designing the dimensions of the thickness of each sealing gasket, the height of the sealing boss, and the depth of the sealing groove. Preferably, the compression amount of the lower sealing gasket is the same as that of the upper sealing gasket, and the compression amount of the gland sealing gasket is 11 times that of the upper / lower sealing gasket.

[0044] In this embodiment, the gland 10 is connected to the housing 4 by threads. During the tightening process of the gland 10, the filter element 7 moves downward, first pressing the lower sealing gasket 6 to achieve the calculated sealing pressure. The gland 10 continues to be screwed in, so that the upper sealing gasket 8 and the gland sealing gasket 9 are pressed together to achieve the calculated sealing pressure.

[0045] In this embodiment, the medium inlet end of the housing 4 is provided with an inlet gasket sealing groove 42 and an inlet fastener mounting hole 43, and the medium outlet end of the housing 4 is provided with an outlet gasket sealing groove 48 and an outlet fastener mounting hole 49. The inlet flange gasket 3 is installed in the inlet gasket sealing groove 42, and the inlet fastener 2 installs the inlet flange 1 at the medium inlet end of the housing 4 through the inlet fastener mounting hole 43. The outlet flange gasket 14 is installed in the outlet gasket sealing groove 48, and the outlet fastener 13 installs the outlet flange 12 at the medium outlet end of the housing 4 through the outlet fastener mounting hole 49. It should be noted that, depending on the structural form of the low-temperature high-pressure test system, the inlet flange assembly (inlet flange, inlet fastener, and inlet flange gasket) and the outlet flange assembly (outlet flange, outlet fastener, and outlet flange gasket) can also be replaced with an inlet connector and an outlet connector, which are screwed to the medium inlet end and the medium outlet end of the housing, respectively, reducing system modification work.

[0046] In this embodiment, the housing, filter element, and gland are made of low-temperature resistant stainless steel. The lower sealing gasket, upper sealing gasket, and gland sealing gasket are made of compressible, low-temperature resistant materials such as F4, copper, or soft aluminum.

[0047] In this embodiment, the quick-release filter cartridge is connected to the cryogenic medium input pipeline and the cryogenic medium output pipeline via the inlet flange and outlet flange, respectively, to connect to the cryogenic high-pressure test system. The cryogenic medium enters the quick-release filter cartridge from upstream through the inlet channel, is filtered by the stainless steel filter screen assembly, enters the filter cartridge through the medium inlet hole, and then flows out through the medium outlet hole and outlet channel, completing the filtration process.

[0048] In this embodiment, when cleaning or replacing the filter element, a small amount of low-pressure isolation gas is introduced upstream of the quick-release filter element, the cap screws are removed, the cap is taken off, and the filter element 7 is removed using tools such as a hook, and a new filter element and sealing gasket are replaced.

[0049] In summary, the quick-release filter element described in this invention has been successfully applied multiple times in the cryogenic high-pressure test system of liquid rocket engines. This quick-release filter element can effectively filter impurities in the medium without causing damage to the filter screen due to the impact of high pressure and high speed media. When the filter is blocked by ice or needs cleaning, the filter element can be replaced directly and quickly without disassembling the filter body, eliminating the phenomenon of pipe joint sticking.

[0050] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0051] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A quick-release filter element for a cryogenic high-pressure test system for liquid rocket engines, characterized in that, include: Imported flange (1), imported fasteners (2), imported flange gaskets (3), housing (4), stainless steel filter assembly (5), lower sealing gasket (6), filter element (7), upper sealing gasket (8), gland sealing gasket (9), gland (10), gland screws (11), outlet flange (12), outlet fasteners (13), and outlet flange gaskets (14); The shell (4) has a medium inlet and a medium outlet at both ends along its long axis; a stepped hole is machined along its short axis; an inlet channel (41) and an outlet channel (47) are provided inside the shell (4); the inlet channel (41) is inclined downward, with one end connected to the medium inlet and the other end connected to the lower part of the stepped hole; the outlet channel (47) is connected to the upper part of the stepped hole and extends horizontally along the axis of the medium outlet. An inlet flange (1) is installed at the medium inlet end of the shell (4) by an inlet fastener (2); an outlet flange (12) is installed at the medium outlet end of the shell (4) by an outlet fastener (13); wherein, an inlet flange gasket (3) is provided between the inlet flange (1) and the shell (4), and an outlet flange gasket (14) is provided between the outlet flange (12) and the shell (4); The filter element (7) is installed in the stepped hole of the housing (4) and sealed in the stepped hole of the housing (4) by the gland (10) and the gland screw (11); wherein, a lower sealing gasket (6) and an upper sealing gasket (8) are provided between the filter element (7) and the housing (4); a gland sealing gasket (9) is provided between the gland (10) and the housing (4); and a stainless steel filter screen assembly (5) is welded to the outside of the filter element (7); The filter element (7) has a barrel-shaped structure; the upper part of the barrel-shaped structure is a cylinder and the lower part is an elliptical cylinder; the cross-section of the elliptical cylinder is elliptical, and the major axis of the ellipse is parallel to the media inlet and outlet axis; several media inlet holes (78) are evenly distributed on the side of the elliptical cylinder; the 62° included side of the elliptical cylinder facing the inlet channel (41) is the filter element's flow-facing surface (71), and no media inlet holes (78) are machined thereon.

2. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 1, characterized in that, The cylinder has several media outlet holes (75) evenly distributed on its side. The media outlet holes (75) are elongated holes. The bottom of the cylinder is provided with a filter element installation guide surface (74) to control the radial relative position of the filter element (7) and the housing (4). When the filter element (7) is inserted into the stepped hole of the housing (4), it is necessary to ensure that when viewed from the direction of the inlet flow channel (41), the flow-facing surface (71) of the filter element is completely aligned with the inlet flow channel (41).

3. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 2, characterized in that, The total area of ​​the medium outflow hole and the medium inflow hole is more than four times the area of ​​the flow channel.

4. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 2, characterized in that, The stainless steel filter assembly (5) has a two-layer structure. The inner layer is a filter skeleton, and the outer layer is a filter that meets the required filtration accuracy for the test. The filter skeleton and the filter are welded to the outside of the elliptical cylinder of the filter element (7) by electron beam welding. The circumferential welding position (72) between the stainless steel filter assembly (5) and the filter element (7) is located at the upper and lower ends of the elliptical cylinder of the filter element (7) and the middle position of the flow-facing surface (71) of the filter element.

5. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 1, characterized in that, The upper sealing gasket (8) is installed in the upper sealing gasket sealing groove (45) inside the housing (4); the lower sealing gasket (6) is installed in the lower sealing gasket sealing groove (73) on the filter element (7); wherein, when the filter element (7) with the lower sealing gasket (6) installed is inserted into the stepped hole of the housing (4) with the upper sealing gasket (8) installed, the lower sealing gasket (6) contacts the lower sealing gasket sealing boss surface (44) inside the housing (4), and the upper sealing gasket (8) contacts the upper sealing gasket sealing boss surface (76) on the filter element (7).

6. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 1, characterized in that, The gland (10) is provided with a gland sealing gasket sealing groove (101), a gland mounting guide surface (102), and a gland screw mounting hole (103); wherein, the gland sealing gasket (9) is installed in the gland sealing gasket sealing groove (101); the gland mounting guide surface (102) is used to control the radial relative position of the gland (10) and the housing (4); the gland screw (11) passes through the gland screw mounting hole (103), screws into the gland mounting threaded hole (46) on the top of the housing (4) and tightens it; when the gland (10) with the gland sealing gasket (9) is installed and fixed on the top of the housing (4) by the gland screw (11), the gland sealing gasket (9) contacts the gland sealing gasket sealing boss surface (77) on the filter element (7).

7. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 1, characterized in that, The shell (4) has a rectangular structure and flow direction markings on its surface. The shell (4) adopts a lightweight design and weight reduction holes (51) are provided in the parts without flow channels and stepped holes.

8. The quick-release filter element for the cryogenic high-pressure test system of liquid rocket engines according to claim 1, characterized in that, The medium inlet and medium outlet are coaxially arranged; the inlet flow channel (41) and the outlet flow channel (47) are arranged at a 32° angle.

9. The quick-release filter element for a cryogenic high-pressure test system for liquid rocket engines according to claim 1, characterized in that, The medium inlet end of the housing (4) is provided with an inlet gasket sealing groove (42) and an inlet fastener mounting hole (43), and the medium outlet end of the housing (4) is provided with an outlet gasket sealing groove (48) and an outlet fastener mounting hole (49); wherein, the inlet flange gasket (3) is installed in the inlet gasket sealing groove (42), and the inlet fastener (2) installs the inlet flange (1) at the medium inlet end of the housing (4) through the inlet fastener mounting hole (43); the outlet flange gasket (14) is installed in the outlet gasket sealing groove (48), and the outlet fastener (13) installs the outlet flange (12) at the medium outlet end of the housing (4) through the outlet fastener mounting hole (49).

10. The quick-release filter element for the cryogenic high-pressure test system of a liquid rocket engine according to claim 1, characterized in that, The bottom of the housing (4) is provided with a filter fixing threaded hole (50); wherein, the quick-release filter element is connected to the low temperature medium input pipeline and the low temperature medium output pipeline through the inlet flange (1) and the outlet flange (12) respectively, and is installed and fixed with other equipment through the filter fixing threaded hole (50).

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