A turbo-pump end face low-temperature seal tester

Abstract

This invention belongs to the field of liquid rocket engines, specifically disclosing a cryogenic sealing tester for turbopump end faces, comprising a shell and a rotor. The shell includes a first support, a second support, and an outer shell. The first support is provided with a tooling end face sealing stationary ring, and the second support is provided with a test piece end face sealing stationary ring. The outer side of the first support is provided with a transparent cover, and the outer side of the second support is provided with a blind cover. The outer shell is provided with a liquid inlet and a vent. The first and second supports are respectively provided with a first liquid outlet and a second liquid outlet. The rotor includes a first bearing, a second bearing, and a shaft. The outer side of the first bearing is provided with a tooling end face sealing dynamic ring, and the outer side of the second bearing is provided with a test piece end face sealing dynamic ring. There is a dynamic seal between the tooling end face sealing dynamic ring and the tooling end face sealing stationary ring, and a dynamic seal between the test piece end face sealing dynamic ring and the test piece end face sealing stationary ring. This invention can meet the requirements of high speed, high precision, and suitability for ultra-low temperature environments for turbopump end face cryogenic sealing testers.

Description

Technical Field

[0001] This invention belongs to the field of liquid rocket engines, specifically relating to a cryogenic sealing tester for the end face of a turbopump. Background Technology

[0002] Currently, most tests on the end face seals of liquid rocket engines are conducted in ambient temperature environments, and the test equipment used is also designed for ambient temperature operation. Few people attempt to simulate the actual operating conditions of turbopump end face seals in low-temperature environments, or they simply operate ambient temperature test equipment in low-temperature environments. Due to the difference in the linear expansion coefficients of the materials, accidents such as bearing seizure and shaft jamming occur, which cannot meet the requirements of high speed, high precision, and suitability for ultra-low temperature environments for low-temperature sealing tests of turbopump end face seals. Summary of the Invention

[0003] The purpose of this invention is to provide a low-temperature sealing tester for turbine pump end faces that meets the requirements of high speed, high precision, and suitability for ultra-low temperature environments in the low-temperature sealing test of turbine pump end faces.

[0004] To achieve the above objectives, the present invention provides a low-temperature sealing tester for the end face of a turbine pump, comprising a housing and a rotor rotatably disposed within the housing. The housing includes an outer shell and a first support and a second support disposed at both ends of the outer shell. The first support is provided with a tooling end face sealing stationary ring, and the second support is provided with a test piece end face sealing stationary ring. A transparent cover is provided on the outer side of the first support, and a blind cover is provided on the outer side of the second support. The outer shell is provided with a liquid inlet and a vent. The first support and the second support are respectively provided with a first liquid outlet and a second liquid outlet. The rotor includes a first bearing, a second bearing, and a rotating shaft rotatably disposed between the first bearing and the second bearing. The rotating shaft passes through the transparent cover and is disposed outside the transparent cover. A tooling end face sealing moving ring is provided on the outer side of the first bearing, and a test piece end face sealing moving ring is provided on the outer side of the second bearing. The tooling end face sealing moving ring and the tooling end face sealing stationary ring are dynamically sealed together, and the test piece end face sealing moving ring and the test piece end face sealing stationary ring are also dynamically sealed together.

[0005] Furthermore, the first support is provided with a first bearing housing, the first bearing is disposed in the first bearing housing and is clearance-fitted with the first bearing housing, the second support is provided with a second bearing housing, the second bearing is disposed in the second bearing housing and is clearance-fitted with the second bearing housing, the first bearing housing is provided with an elastic element, and the end face of the first bearing abuts against the elastic element.

[0006] Furthermore, both the first support and the second support are made of bearing steel, and the first bearing housing is provided with an elastic element, with the end face of the first bearing abutting against the elastic element.

[0007] Furthermore, the transparent cover is provided with a channel for the rotating shaft to pass through, and the inner surface of the channel is provided with a groove.

[0008] Furthermore, the two ends of the rotating shaft are respectively provided with a first fixing component and a second fixing component. The first fixing component is used to lock the tool end face sealing ring and the first bearing on the rotating shaft, and the second fixing component is used to lock the test piece end face sealing ring and the second bearing on the rotating shaft.

[0009] Furthermore, a liquid inlet cavity is formed between the rotating shaft, the first bearing, the second bearing, and the housing. Both the liquid inlet and the vent are connected to the liquid inlet cavity. The housing is provided with a plurality of third measuring nozzles, and the third measuring nozzles are connected to the liquid inlet cavity.

[0010] Furthermore, a tooling end face sealing cavity is formed between the first support, the first bearing, the tooling end face sealing dynamic ring, and the tooling end face sealing stationary ring. The first liquid outlet communicates with the tooling end face sealing cavity. The first support is provided with a plurality of first measuring nozzles, and the first measuring nozzles communicate with the tooling end face sealing cavity. A test piece end face sealing cavity is formed between the second support, the second bearing, the test piece end face sealing dynamic ring, and the test piece end face sealing stationary ring. The second liquid outlet communicates with the test piece end face sealing cavity. The second support is provided with a plurality of second measuring nozzles, and the second measuring nozzles communicate with the test piece end face sealing cavity.

[0011] Furthermore, a first leak detection cavity is formed between the first support, the first bearing, the tooling end face sealing ring, and the through cover. The through cover is provided with a first leak detection port and several fourth measuring ports, and the first leak detection port and the fourth measuring ports are all connected to the first leak detection cavity. A second leak detection cavity is formed between the second support, the second bearing, the test piece end face sealing ring, and the blind cover. The blind cover is provided with a second leak detection port and several fifth measuring ports, and the second leak detection port and the fifth measuring ports are all connected to the second leak detection cavity.

[0012] Furthermore, each end of the sidewall of the outer casing is provided with a pad, and the pad is provided with a vibration sensor.

[0013] Furthermore, the outer casing is also provided with a plurality of sixth measuring nozzles and a plurality of seventh measuring nozzles, wherein the sixth measuring nozzles are connected to the first bearing housing and the seventh measuring nozzles are connected to the second bearing housing.

[0014] The present invention has the following beneficial effects:

[0015] The turbopump end-face low-temperature sealing tester of this invention can promptly dissipate the heat generated during high-speed operation of the first bearing, the second bearing, the tooling end-face sealing dynamic ring, the tooling end-face sealing stationary ring, the test piece end-face sealing dynamic ring, and the test piece end-face sealing stationary ring, thus meeting the requirements of turbopump end-face low-temperature sealing test for high speed, high precision, and applicability to ultra-low temperature environments. It can prevent the first bearing from seizing due to the first support and the second bearing from seizing due to the second support, effectively prevent the impact of low-temperature contraction of the outer shell on the first and second bearing seats, and effectively prevent the first and second bearings from slipping during high-speed operation. When the temperature of the tester changes, it ensures the safety of the first and second bearings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of a low-temperature sealing tester for a turbine pump end face provided in an embodiment of the present invention;

[0018] Figure 2 This is a top view of the low-temperature sealing tester for the end face of a turbine pump provided in an embodiment of the present invention;

[0019] Figure 3 A cross-sectional view of the housing provided in an embodiment of the present invention;

[0020] Figure 4 A cross-sectional view of the rotor provided in an embodiment of the present invention;

[0021] Explanation of the markings in the image:

[0022] 1. First support; 2. Second support; 3. Outer shell; 4. First bearing; 5. Second bearing; 6. Shaft; 10. Tooling end face sealing cavity; 11. Tooling end face sealing stationary ring; 12. Through cap; 13. First outlet; 14. First bearing housing; 15. Channel; 16. Groove; 17. Fourth measuring nozzle; 18. First leak detection port; 19. Sixth measuring nozzle; 20. Test specimen end face sealing cavity; 21. Test specimen end face sealing stationary ring; 22. Blind cap; 23. Second outlet; 24. Fifth measuring nozzle; 25. Second leak detection port; 26. Seventh measuring nozzle; 27. 30. Second bearing housing; 31. Liquid inlet chamber; 32. Liquid inlet; 33. Vent; 34. First measuring nozzle; 35. Second measuring nozzle; 36. Third measuring nozzle; 40. Pad; 41. First leak detection chamber; 42. Tooling end face sealing ring; 50. Elastic element; 51. Second leak detection chamber; 60. Test piece end face sealing ring; 71. Key; 72. First spacer ring; 73. Third spacer ring; 74. First locking washer; 85. Second nut; 86. Second spacer ring; 87. Fourth spacer ring; 88. Second locking washer; 89. Baffle. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] Example

[0028] Please see Figure 1-4 As shown in the figure, the cryogenic seal tester for the turbine pump end face provided in this embodiment includes a housing and a rotor rotatably disposed inside the housing. The housing includes an outer shell 3 and a first support 1 and a second support 2 provided at both ends of the outer shell 3. A tooling end face seal static ring 11 is provided on the first support 1, a test piece end face seal static ring 21 is provided on the second support 2, a through cover 12 is provided outside the first support 1, a blind cover 22 is provided outside the second support 2, a liquid inlet 31 and a gas outlet 32 are provided on the outer shell 3, and a first liquid outlet 13 and a second liquid outlet 23 are provided on the first support 1 and the second support 2 respectively. The rotor includes a first bearing 4, a second bearing 5, and a rotating shaft 6 rotatably disposed between the first bearing 4 and the second bearing 5. The first bearing 4 is disposed inside the first support 1, the second bearing 5 is disposed inside the second support 2, the rotating shaft 6 passes through the through cover 12 and is disposed outside the through cover 12. A tooling end face seal dynamic ring 41 is provided outside the first bearing 4, a test piece end face seal dynamic ring 51 is provided outside the second bearing 5. There is a dynamic seal between the tooling end face seal dynamic ring 41 and the tooling end face seal static ring 11, and a dynamic seal between the test piece end face seal dynamic ring 51 and the test piece end face seal static ring 21.

[0029] In the above, the test medium enters the interior of the tester from the liquid inlet 31, reaches the tooling end face seal dynamic ring 41 and the tooling end face seal static ring 11 through the first bearing 4, then flows out from the first liquid outlet 13 provided on the first support 1, reaches the test piece end face seal dynamic ring 51 and the test piece end face seal static ring 21 through the second bearing 5, and then flows out from the second liquid outlet 23 provided on the second support 2. During this process, the heat generated during the high-speed operation of the first bearing 4, the second bearing 5, the tooling end face seal dynamic ring 41, the tooling end face seal static ring 11, the test piece end face seal dynamic ring 51, and the test piece end face seal static ring 21 is carried away, meeting the requirements of high speed, high precision, and suitability for ultra-low temperature environments for the cryogenic seal test of the turbine pump end face.

[0030] Specifically, a first bearing seat 14 is provided inside the first support 1. The first bearing 4 is disposed inside the first bearing seat 14 and is in clearance fit with the first bearing seat 14. A second bearing seat 27 is provided inside the second support 2. The second bearing 5 is disposed inside the second bearing seat 27 and is in clearance fit with the second bearing seat 27. The first bearing seat 14 is used for the installation of the first bearing 4, and the second bearing seat 27 is used for the installation of the second bearing 5. The clearance fit between the first bearing 4 and the first bearing seat 14 can prevent the situation where the first bearing 4 is locked by the first support 1. The clearance fit between the second bearing 5 and the second bearing seat 27 can prevent the situation where the second bearing 5 is locked by the second support 2.

[0031] ​In a preferred embodiment, the first bearing housing 14 is disposed on one side of the first support 1 and located inside the outer casing 3, with a clearance fit between the first bearing housing 14 and the outer casing 3. The second bearing housing 27 is disposed on one side of the second support 2 and located inside the outer casing 3, with a clearance fit between the second bearing housing 27 and the outer casing 3. This ensures that neither the first bearing housing 14 nor the second bearing housing 27 has direct contact with the outer casing 3, thereby effectively preventing the impact of low-temperature shrinkage of the outer casing 3 on the first bearing housing 14 and the second bearing housing 27. This will not change the fit clearance between the first bearing 4 and the first bearing housing 14, nor the fit clearance between the second bearing 5 and the second bearing housing 27.

[0032] Optionally, the first support 1 and the second support 2 are both made of bearing steel, the first bearing 4 and the second bearing 5 are both made of bearing steel, and the first support 1 and the second support 2 are also made of bearing steel. This allows the outer rings of the first support 1 and the first bearing 4, as well as the outer rings of the second support 2 and the second bearing 5, to maintain synchronous contraction in a low-temperature environment. This ensures that the fit clearance between the first bearing 4 and the first bearing housing 14 at room temperature, and the fit clearance between the second bearing 5 and the second bearing housing 27 at room temperature, remain consistent with their fit clearance at low temperatures. This ensures that the installation accuracy of the test instrument remains consistent at room temperature and its usage accuracy at low temperatures, effectively solving the problem of the first bearing 4 being seized by the first support 1 and the second bearing 5 being seized by the second support 2 at low temperatures.

[0033] Specifically, an elastic element 42 is provided inside the first bearing housing 14. The end face of the first bearing 4 abuts against the elastic element 42. The elastic element 42 can generate a thrust on the first bearing 4 in the direction of the second bearing 5 and make the second bearing 5 fit tightly against the second support 2. At this time, the axial clearance of the first bearing 4 and the second bearing 5 is eliminated. The rotor is positioned inside the outer shell 3 through the first support 1, the second support 2 and the elastic element 42. At the same time, the use of the elastic element 42 provides a certain preload core for the first bearing 4 and the second bearing 5, which can effectively prevent the first bearing 4 and the second bearing 5 from slipping when running at high speed. When the temperature of the tester changes, the deformation of each part due to thermal expansion and contraction can also be achieved through the deformation of the elastic element 42. The second bearing 5 fits tightly against the second support 2, which can also limit the further displacement of the rotor, thereby ensuring the safety of the first bearing 4 and the second bearing 5.

[0034] Optionally, the elastic element 42 is a wave spring. Wave springs require very little installation space and have special functions such as reducing noise and vibration, which is beneficial to the stability of the first bearing 4, the second bearing 5 and the rotating shaft 6.

[0035] Specifically, the outer casing 3 is also provided with a number of first measuring nozzles 33 and a number of second measuring nozzles 34. The first measuring nozzles 33 are connected to the first bearing housing 14, and the second measuring nozzles 34 are connected to the second bearing housing 27. Temperature sensors or pressure sensors can be installed on the first measuring nozzles 33 and the second measuring nozzles 34, so that the temperature, pressure and other parameters at the first bearing 4 and the second bearing 5 can be directly measured.

[0036] In one specific embodiment, there are two first measuring nozzles 33, which can simultaneously install temperature sensors and pressure sensors, thereby enabling the simultaneous measurement of temperature and pressure parameters at the first bearing 4; there are two second measuring nozzles 34, which can simultaneously install temperature sensors and pressure sensors, thereby enabling the simultaneous measurement of temperature and pressure parameters at the second bearing 5.

[0037] Specifically, the cover 12 has a channel 15 for the rotating shaft 6 to pass through, and a groove 16 is provided on the inner surface of the channel 15. The channel 15 facilitates the rotating shaft 6 to pass through the inside of the tester. A key 60 is provided at one end of the rotating shaft 6. After the rotating shaft 6 passes through the inside of the tester, the key 60 is outside the tester. The presence of the groove 16 creates many tiny gaps between the channel 15 and the rotating shaft 6, thereby forming a labyrinth seal. When the tester is working, high-pressure nitrogen gas is introduced into the groove 16 to form a gas chamber between the rotating shaft 6 and the groove 16, thus forming a sealed cavity inside the tester to prevent leakage of the test medium.

[0038] Optionally, within the channel 15, the number of grooves 16 near the outer side of the channel 15 is greater than the number of grooves 16 near the inner side of the channel 15, thereby enabling the resistance of the gas on the outer side of the channel 15 to be greater than the resistance of the gas on the inner side of the channel 15, resulting in a better sealing effect.

[0039] In this embodiment, a first fixing component and a second fixing component are respectively provided at both ends of the rotating shaft 6. The first fixing component is used to lock the tool end face sealing ring 41 and the first bearing 4 on the rotating shaft 6, and the second fixing component is used to lock the test piece end face sealing ring 51 and the second bearing 5 on the rotating shaft 6.

[0040] Specifically, the first fixing component includes a first nut 71 fixed on the rotating shaft 6, a first spacer ring 72 disposed between the first nut 71 and the tooling end face sealing ring 41, and a third spacer ring 73 disposed between the tooling end face sealing ring 41 and the first bearing 4. After the first nut 71 is tightened, it is used to fix the first spacer ring 72, the tooling end face sealing ring 41, and the third spacer ring 73. The second fixing component includes a second nut 81 fixed on the rotating shaft 6, a second spacer ring 82 disposed between the second nut 81 and the test piece end face sealing ring 51, and a fourth spacer ring 83 disposed between the test piece end face sealing ring 51 and the second bearing 5. After the second nut 81 is tightened, it is used to fix the second spacer ring 82, the test piece end face sealing ring 51, and the fourth spacer ring 83.

[0041] In the above embodiment, a first locking washer 74 is provided between the first nut 71 and the first spacer ring 72, and the first locking washer 74 is used to prevent the first nut 71 from loosening; a second locking washer 84 and a baffle 85 are provided between the second nut 81 and the second spacer ring 82, and the second locking washer 84 and the baffle 85 are used to prevent the second nut 81 from loosening.

[0042] Specifically, a liquid inlet chamber 30 is formed between the rotating shaft 6, the first bearing 4, the second bearing 5, and the outer casing 3. The liquid inlet 31 and the vent 32 are both connected to the liquid inlet chamber 30. Several third measuring nozzles 35 are provided on the outer casing 3, and the third measuring nozzles 35 are connected to the liquid inlet chamber 30. Temperature sensors or pressure sensors can be installed on the third measuring nozzles 35, so that the temperature, pressure and other parameters in the liquid inlet chamber 30 can be directly measured.

[0043] In one specific embodiment, there are two third measuring nozzles 35, which can simultaneously install temperature sensors and pressure sensors, thereby enabling the simultaneous measurement of temperature and pressure parameters within the liquid inlet chamber 30.

[0044] Specifically, a tooling end face sealing cavity 10 is formed between the first support 1, the first bearing 4, the tooling end face sealing dynamic ring 41, and the tooling end face sealing stationary ring 11. The first liquid outlet 13 communicates with the tooling end face sealing cavity 10. Several fourth measuring nozzles 17 are provided on the first support 1, and the fourth measuring nozzles 17 communicate with the tooling end face sealing cavity 10. Temperature sensors or pressure sensors can be installed on the fourth measuring nozzles 17, so that the temperature, pressure, and other parameters inside the tooling end face sealing cavity 10 can be directly measured. The test specimen end face sealing cavity 20 is formed between the second support 2, the second bearing 5, the test specimen end face sealing dynamic ring 51, and the test specimen end face sealing stationary ring 21. The second liquid outlet 23 is connected to the test specimen end face sealing cavity 20. Several fifth measuring nozzles 24 are provided on the second support 2, and the fifth measuring nozzles 24 are connected to the test specimen end face sealing cavity 20. Temperature sensors or pressure sensors can be installed on the fifth measuring nozzles 24, so that the temperature, pressure and other parameters inside the test specimen end face sealing cavity 20 can be directly measured.

[0045] In one specific embodiment, there are two fourth measuring nozzles 17, which can simultaneously install temperature sensors and pressure sensors, thereby enabling simultaneous measurement of temperature and pressure parameters within the tooling end face sealing cavity 10; there are two fifth measuring nozzles 24, which can simultaneously install temperature sensors and pressure sensors, thereby enabling simultaneous measurement of temperature and pressure parameters within the test piece end face sealing cavity 20.

[0046] Specifically, a first leak detection chamber 40 is formed between the first support 1, the first bearing 4, the tooling end face sealing ring 11, and the through cover 12. The through cover 12 is provided with a first leak detection port 18 and several sixth measuring nozzles 19. Both the first leak detection port 18 and the sixth measuring nozzles 19 are connected to the first leak detection chamber 40. Temperature sensors or pressure sensors can be installed on the sixth measuring nozzles 19, so that the temperature, pressure and other parameters inside the first leak detection chamber 40 can be directly measured. A second leak detection chamber 50 is formed between the second support 2, the second bearing 5, the test piece end face sealing ring 21, and the blind cover 22. The blind cover 22 is provided with a second leak detection port 25 and several seventh measuring nozzles 26. Both the second leak detection port 25 and the seventh measuring nozzles 26 are connected to the second leak detection chamber 50. Temperature sensors or pressure sensors can be installed on the seventh measuring nozzles 26, so that the temperature, pressure and other parameters inside the second leak detection chamber 50 can be directly measured.

[0047] In one specific embodiment, there are two sixth measuring connectors 19, which can simultaneously install temperature sensors and pressure sensors, thereby enabling simultaneous measurement of temperature and pressure parameters within the first leak detection chamber 40; there are two seventh measuring connectors 26, which can simultaneously install temperature sensors and pressure sensors, thereby enabling simultaneous measurement of temperature and pressure parameters within the second leak detection chamber 50.

[0048] Optionally, plugs are provided at the first measuring port 33, the second measuring port 34, the third measuring port 35, the fourth measuring port 17, the fifth measuring port 24, the sixth measuring port 19, and the seventh measuring port 26, and are fixed by plug nuts, so as to ensure sealing when no temperature sensor or pressure sensor is installed at the first measuring port 33, the second measuring port 34, the third measuring port 35, the fourth measuring port 17, the fifth measuring port 24, the sixth measuring port 19, and the seventh measuring port 26.

[0049] Specifically, pads 36 are provided at both ends of the side wall of the outer shell 3, and vibration sensors are provided on the pads 36. The vibration sensors can accurately measure the vibration frequency of the outer shell 3, thereby measuring the vibration of the tester.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A low-temperature sealing tester for the end face of a turbine pump, characterized in that, The device includes a housing and a rotor rotatably disposed within the housing. The housing includes an outer shell and a first support and a second support located at both ends of the outer shell. The first support has a tooling end face sealing stationary ring, and the second support has a test specimen end face sealing stationary ring. A transparent cover is provided on the outer side of the first support, and a blind cover is provided on the outer side of the second support. The outer shell has a liquid inlet and a vent. The first support and the second support have a first liquid outlet and a second liquid outlet, respectively. The rotor includes a first bearing, a second bearing, and a rotating shaft rotatably disposed between the first bearing and the second bearing. The rotating shaft passes through the transparent cover and is located outside the transparent cover. A tooling end face sealing moving ring is provided on the outer side of the first bearing, and a test specimen end face sealing moving ring is provided on the outer side of the second bearing. The tooling end face sealing moving ring and the tooling end face sealing stationary ring are dynamically sealed together, and the test specimen end face sealing moving ring and the test specimen end face sealing stationary ring are also dynamically sealed together.

2. The low-temperature sealing tester for turbine pump end face according to claim 1, characterized in that, The first support is provided with a first bearing housing, and the first bearing is disposed in the first bearing housing and is clearance-fitted with the first bearing housing. The second support is provided with a second bearing housing, and the second bearing is disposed in the second bearing housing and is clearance-fitted with the second bearing housing.

3. The low-temperature sealing tester for the turbine pump end face according to claim 2, characterized in that, The first bearing housing is disposed on one side of the first support and located inside the housing, and the first bearing housing is clearance-fitted with the housing. The second bearing housing is disposed on one side of the second support and located inside the housing, and the second bearing housing is clearance-fitted with the housing.

4. The low-temperature sealing tester for the turbine pump end face according to claim 2, characterized in that, Both the first support and the second support are made of bearing steel. The first bearing housing is provided with an elastic element, and the end face of the first bearing abuts against the elastic element.

5. The low-temperature sealing tester for turbine pump end face according to claim 2, characterized in that, The outer casing is also provided with a plurality of first measuring nozzles and a plurality of second measuring nozzles, wherein the first measuring nozzles are connected to the first bearing housing, and the second measuring nozzles are connected to the second bearing housing.

6. The low-temperature sealing tester for the turbine pump end face according to claim 1, characterized in that, The transparent cover has a channel for the rotating shaft to pass through, and the inner surface of the channel has a groove.

7. The low-temperature sealing tester for the turbine pump end face according to claim 6, characterized in that, The two ends of the rotating shaft are respectively provided with a first fixing component and a second fixing component. The first fixing component is used to lock the tool end face sealing ring and the first bearing on the rotating shaft, and the second fixing component is used to lock the test piece end face sealing ring and the second bearing on the rotating shaft.

8. The low-temperature sealing tester for the turbine pump end face according to claim 1, characterized in that, A liquid inlet chamber is formed between the rotating shaft, the first bearing, the second bearing, and the outer casing. Both the liquid inlet and the vent are connected to the liquid inlet chamber. The outer casing is provided with a plurality of third measuring nozzles, and the third measuring nozzles are connected to the liquid inlet chamber.

9. The low-temperature sealing tester for the turbine pump end face according to claim 1, characterized in that, A tooling end face sealing cavity is formed between the first support, the first bearing, the tooling end face sealing dynamic ring, and the tooling end face sealing stationary ring. The first liquid outlet communicates with the tooling end face sealing cavity. The first support is provided with a plurality of fourth measuring nozzles, and the fourth measuring nozzles communicate with the tooling end face sealing cavity. A test piece end face sealing cavity is formed between the second support, the second bearing, the test piece end face sealing dynamic ring, and the test piece end face sealing stationary ring. The second liquid outlet communicates with the test piece end face sealing cavity. The second support is provided with a plurality of fifth measuring nozzles, and the fifth measuring nozzles communicate with the test piece end face sealing cavity.

10. The low-temperature sealing tester for the turbine pump end face according to claim 1, characterized in that, A first leak detection cavity is formed between the first support, the first bearing, the tooling end face sealing ring, and the through cover. The through cover is provided with a first leak detection port and several sixth measuring nozzles, and the first leak detection port and the sixth measuring nozzles are all connected to the first leak detection cavity. A second leak detection cavity is formed between the second support, the second bearing, the test piece end face sealing ring, and the blind cover. The blind cover is provided with a second leak detection port and several seventh measuring nozzles, and the second leak detection port and the seventh measuring nozzles are all connected to the second leak detection cavity.

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