Quick-release filter element filter for low-temperature and high-pressure test system of liquid rocket engine

Abstract

The invention discloses a quick-release filter element filter for a low-temperature and high-pressure test system of a liquid rocket engine. The quick-release filter element filter 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 shell in the short axis direction; the inlet / outlet flange is mounted at the medium inlet / outlet end of the shell through an inlet / outlet fastener; an inlet / outlet flange gasket is arranged between the inlet / outlet flange and the shell; the filter element is arranged in a stepped hole of the shell and is packaged through a gland and a gland screw; a lower sealing gasket and an upper sealing gasket are arranged between the filter element and the shell; a gland sealing gasket is arranged between the gland and the shell; the stainless steel filter screen assembly is welded to the outer side of the filter element. According to the filter with the quick-release filter element, the problems that the filter element is damaged due to high pressure difference impact and the test is terminated due to ice blockage are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of low-temperature and high-pressure testing, and in particular relates to a quick-release filter element filter for a low-temperature and high-pressure testing system of a liquid rocket engine. Background Art

[0002] Products in the aerospace field are sophisticated and extremely sensitive to excess matter. Therefore, in the low-temperature test system, multiple axial-flow cryogenic filters are generally installed to prevent excess matter from entering the tested product, and the cryogenic filters need to be regularly disassembled, cleaned and inspected. As the aerospace field and other fields develop towards deep space and high thrust, the test pressure of cryogenic components has increased significantly, resulting in two problems with the cryogenic filter in the test system during the low-temperature test: First, the filter screen is damaged under the impact of high-pressure and high-flow medium, and excess matter enters the tested product. Quality problems. Second, the high pressure difference causes excess matter such as ice crystals in the medium to quickly adhere to the filter surface, resulting in ice blockage of the filter. The test pressure cannot meet the test requirements, so the test has to be terminated. After the system returns to normal temperature, the filter element is disassembled and cleaned, affecting the test progress. Therefore, the current conventional axial-flow cryogenic filters can no longer meet the test requirements of high pressure, large flow and high efficiency. Summary of the invention

[0003] The technology of the present invention solves the problem: Overcoming the shortcomings of the prior art, providing a quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system, aiming to solve the problem of filter element damage caused by high pressure difference impact and test termination caused by ice blockage.

[0004] In order to solve the above technical problems, the present invention discloses a quick-release filter element filter for a low-temperature and high-pressure test system of a liquid rocket engine, comprising: an inlet flange, an inlet fastener, an inlet 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, a gland screw, an outlet flange, an outlet fastener and an outlet flange gasket;

[0005] The two ends of the shell in the long axis direction are respectively provided with a medium inlet and a medium outlet; a stepped hole is processed in the short axis direction of the shell; an inlet flow channel and an outlet flow channel are provided in the shell; wherein the inlet flow channel is arranged obliquely downward, one end is connected to the medium inlet, and the other end is connected to the middle and lower part of the stepped hole; the outlet flow channel is connected to the middle and upper part of the stepped hole, and extends horizontally in the direction of the medium outlet axis;

[0006] The inlet flange is installed at the medium inlet end of the shell through the inlet fastener; the outlet flange is installed at the medium outlet end of the shell through the outlet fastener; wherein an inlet flange gasket is arranged between the inlet flange and the shell, and an outlet flange gasket is arranged between the outlet flange and the shell;

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

[0008] In the above-mentioned quick-release filter element filter for the low-temperature and high-pressure test system of a liquid rocket engine, the filter element is 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 an ellipse, and the long axis of the ellipse is parallel to the inlet and outlet axes of the medium; a number of medium inflow holes are evenly distributed on the side of the elliptical cylinder; the 62° angle side of the elliptical cylinder facing the inlet flow channel is used as the filter element flow surface, and the medium inflow hole is not processed;

[0010] There are several medium outflow holes evenly distributed on the side of the cylinder, and the medium outflow holes are oblong holes; a filter element installation guide surface is set at the bottom of the cylinder to control the radial relative position of the filter element and the shell; when the filter element is inserted into the stepped hole of the shell, it is necessary to ensure that the filter element flow facing surface is completely facing the inlet flow channel when observed from the direction of the inlet flow channel.

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

[0012] In the above-mentioned quick-release filter element filter for the liquid rocket engine low-temperature and high-pressure test system, the stainless steel filter mesh assembly is a two-layer structure, the inner layer is the filter mesh frame, and the outer layer is the filter mesh that meets the filtration accuracy required for the test; the filter mesh frame and the filter mesh are welded to the outside of the elliptical cylinder of the filter element by electron beam welding; wherein, the circumferential welding position of the stainless steel filter mesh assembly and the filter element is located at: the upper and lower end sides of the elliptical cylinder of the filter element and the middle position of the flow-facing surface of the filter element.

[0013] In the above-mentioned quick-release filter element filter for the low-temperature and high-pressure test system of a liquid rocket engine, the upper sealing gasket is installed in the upper sealing gasket sealing groove in the shell; 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 shell with the upper sealing gasket installed, the lower sealing gasket contacts with the lower sealing gasket sealing boss surface in the shell, and the upper sealing gasket contacts with the upper sealing gasket sealing boss surface on the filter element.

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

[0015] In the above-mentioned quick-release filter element filter for the liquid rocket engine low-temperature and high-pressure test system, the shell is an overall rectangular structure with flow direction markings engraved on the surface; the shell adopts a lightweight design, and weight-reducing holes are provided in locations where there are no flow channels and stepped holes.

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

[0017] In the above-mentioned quick-release filter element filter for the low-temperature and high-pressure test system of a liquid rocket engine, an inlet sealing gasket sealing groove and an inlet fastener mounting hole are provided at the medium inlet end of the shell, and an outlet sealing gasket sealing groove and an outlet fastener mounting hole are provided at the medium outlet end of the shell; wherein, the inlet flange gasket is installed in the inlet sealing gasket sealing groove, and the inlet fastener installs 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 installs the outlet flange at the medium outlet end of the shell through the outlet fastener mounting hole.

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

[0019] The present invention has the following advantages:

[0020] (1) The present invention discloses a quick-release filter element for a liquid rocket engine low-temperature and high-pressure test system. After multiple tests and verifications in the low-temperature and high-pressure test system, it can effectively filter excess matter in the medium and has the function of quickly replacing the filter element.

[0021] (2) The present invention discloses a quick-release filter cartridge filter for a liquid rocket engine cryogenic and high-pressure test system. The medium inlet and the medium outlet are coaxially arranged and can be installed at any position in the existing pipeline without changing the direction of the existing cryogenic pipeline system. Through simulation verification, the flow resistance of the quick-release filter cartridge filter of the present invention is basically the same as the flow resistance of the existing filter.

[0022] (3) The present invention discloses a quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system. The filter element is installed at a position perpendicular to the flow channel, and the filter element can be quickly replaced through the gland without removing the housing from the low-temperature piping system.

[0023] (4) The present invention discloses a quick-release filter element for a liquid rocket engine low-temperature and high-pressure test system. The structural design of multiple gaskets with different compression amounts allows the gland to compress multiple gaskets at one time and each gasket to reach a preset sealing pressure ratio, thereby achieving the effect of convenient assembly and quick disassembly.

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

[0025] (6) The present invention discloses a quick-release filter element for a liquid rocket engine low-temperature and high-pressure test system. The elliptical cylinder in the lower part of the filter element has no holes facing the inlet flow channel, which serves as the flow-facing surface of the filter element. It can prevent high-pressure media from impacting the stainless steel filter mesh assembly, reduce damage to the stainless steel filter mesh assembly, and significantly increase the service life of the filter element.

[0026] (7) The present invention discloses a quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system. The shell adopts a planar structure and a sealing groove design at the medium inlet and outlet positions, and can be customized and processed into a pipe joint connection or a flange connection according to the low-temperature test pipeline connection form. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of a quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system according to an embodiment of the present invention;

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

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

[0030] Figure 4 is a structural schematic diagram of a housing in an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of a gland in an embodiment of the present invention. DETAILED DESCRIPTION

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

[0033] Reference Figures 1 to 5 In this embodiment, the quick-release filter element filter for the liquid rocket engine low-temperature and high-pressure test system includes: an inlet flange 1, an inlet fastener 2, an inlet flange gasket 3, a shell 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 shell 4 is provided with a medium inlet and a medium outlet at two ends in the long axis direction, respectively, and the medium inlet and the medium outlet are coaxially arranged.

[0035] The housing 4 is machined with stepped holes in the short axis direction for installing a gland, an upper sealing gasket, a filter element, etc.

[0036] The housing 4 is provided with an inlet flow channel 41 and an outlet flow channel 47, which are arranged at an angle of 32°. The inlet flow channel 41 is arranged obliquely downward, with one end connected to the medium inlet and the other end connected to the lower middle part of the stepped hole; the outlet flow channel 47 is connected to the upper middle 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 shell 4 through the inlet fastener 2, and the outlet flange 12 is installed at the medium outlet end of the shell 4 through the outlet fastener 13. Among them, an inlet flange gasket 3 is arranged between the inlet flange 1 and the shell 4, and an outlet flange gasket 14 is arranged between the outlet flange 12 and the shell 4.

[0038] The filter element 7 is installed in the stepped hole of the housing 4 and is encapsulated in the stepped hole of the housing 4 by a gland 10 and a gland screw 11. A lower sealing gasket 6 and an upper sealing gasket 8 are arranged between the filter element 7 and the housing 4, and a gland sealing gasket 9 is arranged 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 shell 4 is a rectangular parallelepiped structure with a flow direction mark engraved on the surface. The shell 4 adopts a lightweight design, and is thinned and lightened (e.g., a weight-reducing hole 51 is provided) in the parts without flow channels and stepped holes. The bottom of the shell 4 is provided with a filter fixing threaded hole 50, which is used to fix the quick-release filter element when necessary, such as fixing the quick-release filter element filter on the bracket through the filter fixing threaded hole 50.

[0041] In this embodiment, the filter element 7 is a barrel-shaped structure; the upper part of the barrel-shaped structure is a cylinder, and the lower part is an elliptical cylinder. Among them, the cross-section of the elliptical cylinder is an ellipse, and the long axis of the ellipse is parallel to the axis of the medium inlet and outlet; a number of medium inlet holes 78 are evenly distributed on the side of the elliptical cylinder; the 62° angle side of the elliptical cylinder facing the inlet flow channel 41 is used as the filter element flow-facing surface 71, and the medium inlet hole 78 is not processed. A number of medium outflow holes 75 are evenly distributed on the side of the cylinder, and the medium outflow holes 75 are oblong holes; a filter element installation 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 the filter element 7 is inserted into the stepped hole of the housing 4, it is necessary to ensure that the filter element flow-facing surface 71 is completely opposite to the inlet flow channel 41 when viewed from the direction of the inlet flow channel 41. Preferably, the total area of ​​the medium outflow hole and the medium inflow hole is more than 4 times the flow channel area.

[0042] In this embodiment, the stainless steel filter assembly 5 is a two-layer structure, the inner layer is a filter frame, and the outer layer is a filter that meets the filtering accuracy required by the test; the filter frame and the filter are welded to the outside of the elliptical column of the filter element 7 by electron beam welding. Among them, the circumferential welding position 72 of the stainless steel filter assembly 5 and the filter element 7 is located at: the upper and lower ends of the elliptical column of the filter element 7 and the middle position of the filter element flow surface 71.

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

[0044] In this embodiment, the pressure cap 10 is connected to the housing 4 through a thread. During the tightening process of the pressure cap 10, the filter element 7 is driven to move downward, firstly compressing the lower sealing gasket 6 to achieve the calculated sealing pressure ratio; the pressure cap 10 continues to be screwed in, so that the upper sealing gasket 8 and the pressure cap sealing gasket 9 are compressed to achieve the calculated sealing pressure ratio.

[0045] In this embodiment, the medium inlet end of the shell 4 is provided with an inlet gasket sealing groove 42 and an inlet fastener mounting hole 43, and the medium outlet end of the shell 4 is provided with an outlet gasket sealing groove 48 and an outlet fastener mounting hole 49. Among them, the inlet flange gasket 3 is installed in the inlet gasket sealing groove 42, and the inlet fastener 2 installs the inlet flange 1 on the medium inlet end of the shell 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 on the medium outlet end of the shell 4 through the outlet fastener mounting hole 49. It should be noted that, according to the structural form of the low temperature and 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 joint and an outlet joint, and the inlet joint and the outlet joint are respectively screwed with the medium inlet end and the medium outlet end of the shell, so as to reduce the system modification work.

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

[0047] In this embodiment, the quick-release filter element filter is connected to the low-temperature medium input pipeline and the low-temperature medium output pipeline through the inlet flange and the outlet flange respectively, so as to be connected to the low-temperature high-pressure test system. The low-temperature medium enters the quick-release filter element filter from the upstream through the inlet flow channel, is filtered by the stainless steel filter assembly, enters the filter element through the medium inlet hole, and then flows out from the outlet flow channel through the medium outflow hole to complete the filtering of the medium.

[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 filter, the gland screws are removed, the gland is removed, the filter element 7 is taken out using a tool such as a hook, and a new filter element and sealing gasket are replaced.

[0049] In summary, the quick-release filter cartridge filter described in the present invention has been successfully used in liquid rocket engine low-temperature and high-pressure test systems for many times. The quick-release filter cartridge filter can effectively filter impurities in the medium, and there is no phenomenon of damage to the filter due to the impact of high-pressure and high-speed media. When the filter is blocked by ice or cleaned, the filter body does not need to be disassembled, and the filter cartridge can be directly and quickly replaced to eliminate the phenomenon of pipe joints sticking.

[0050] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0051] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A quick-release filter element filter for a liquid rocket engine low temperature and high pressure test system, characterized in that: include: Inlet flange (1), inlet fastener (2), inlet flange gasket (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 screw (11), outlet flange (12), outlet fastener (13) and outlet flange gasket (14); The shell (4) is provided with a medium inlet and a medium outlet at both ends in the long axis direction; the shell (4) is processed with a stepped hole in the short axis direction; an inlet flow channel (41) and an outlet flow channel (47) are provided in the shell (4); wherein the inlet flow channel (41) is arranged obliquely 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 (47) is connected to the upper part of the stepped hole and extends horizontally in the direction of the medium outlet axis; The inlet flange (1) is installed at the medium inlet end of the shell (4) through the inlet fastener (2); the outlet flange (12) is installed at the medium outlet end of the shell (4) through the 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 is sealed in the stepped hole of the housing (4) by means of a gland (10) and a gland screw (11); a lower sealing gasket (6) and an upper sealing gasket (8) are arranged between the filter element (7) and the housing (4); a gland sealing gasket (9) is arranged between the gland (10) and the housing (4); and a stainless steel filter screen assembly (5) is welded to the outer side of the filter element (7).

2. The quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system according to claim 1, characterized in that: The filter element (7) is a barrel-shaped structure; the upper part of the barrel-shaped structure is a cylinder, and the lower part is an elliptical column; The cross section of the elliptical cylinder is an ellipse, and the long axis of the ellipse is parallel to the inlet and outlet axes of the medium; a plurality of medium inlet holes (78) are evenly distributed on the side of the elliptical cylinder; the side of the elliptical cylinder facing the inlet flow channel (41) at an angle of 62° serves as the filter element flow-facing surface (71), and the medium inlet holes (78) are not processed; A plurality of medium outflow holes (75) are evenly distributed on the side of the cylinder, and the medium outflow holes (75) are oblong holes; a filter element installation guide surface (74) is provided at the bottom of the cylinder, which is used 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 the filter element flow facing surface (71) is completely opposite to the inlet flow channel (41) when viewed from the direction of the inlet flow channel (41).

3. The quick-release filter element filter for the liquid rocket engine low temperature and high pressure test system according to claim 2, characterized in that: The total area of ​​the medium outflow hole and the medium inflow hole is more than 4 times the flow channel area.

4. The quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system according to claim 2, characterized in that: The stainless steel filter assembly (5) is a two-layer structure, the inner layer is a filter frame, and the outer layer is a filter that meets the filtering accuracy required by the test; the filter frame and the filter are welded to the outer side of the elliptical column of the filter element (7) by electron beam welding; wherein the circumferential welding position (72) of the stainless steel filter assembly (5) and the filter element (7) is located at: the upper and lower end sides of the elliptical column of the filter element (7) and the middle position of the filter element flow front surface (71).

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

6. The quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system according to claim 1, characterized in that: The gland (10) is provided with a gland gasket sealing groove (101), a gland installation guide surface (102) and a gland screw installation hole (103); wherein the gland gasket (9) is installed in the gland gasket sealing groove (101); the gland installation 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 installation hole (103), is screwed into the gland installation threaded hole (46) at the top of the housing (4) and is tightened; when the gland (10) with the gland gasket (9) installed is installed and fixed on the top of the housing (4) by the gland screw (11), the gland gasket (9) is brought into contact with the gland gasket sealing boss surface (77) on the filter element (7).

7. The quick-release filter element filter for a liquid rocket engine low-temperature and high-pressure test system according to claim 1, characterized in that: The shell (4) is in the form of a rectangular parallelepiped structure as a whole, and a flow direction mark is engraved on the surface; the shell (4) adopts a lightweight design, and a weight-reducing hole (51) is provided at a position without a flow channel and a stepped hole.

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

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

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

Images