Liquid metal reactor main pump bearing performance testing device and testing system

Abstract

The invention relates to a liquid metal reactor main pump bearing performance test device and test system. The liquid metal reactor main pump bearing performance testing device comprises a container, a connecting assembly and a loading assembly. Wherein the bottom of the container is provided with a test medium, the upper part of the test medium is provided with a gas phase space, the container is internally provided with a bearing seat, the bearing seat is used for installing a tested bearing, and the tested bearing is soaked in the test medium. The connecting assembly comprises a rotating shaft rotatably connected in the container, and the tested bearing is connected to the rotating shaft. The loading assembly comprises a loading device, and the loading device is installed on the container and is used for applying a loading force to the tested bearing. The bottom of the container is filled with the testing medium, the gas phase space is reserved on the upper portion of the testing medium, so that the container is of a vertical structure, the testing medium is gathered downwards due to gravity, the influence of the liquid high-temperature metal medium on the shaft seal is reduced, the shaft seal difficulty is lowered, the sealing condition is fundamentally improved, and the leakage risk of the liquid high-temperature metal medium is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of bearing performance testing, and in particular to a liquid metal reactor main pump bearing performance testing device and testing system. Background Art

[0002] In the primary circulation system of a fourth-generation liquid metal reactor (GEN IV) reactor, lead-bismuth bearings play a crucial role in supporting the main pump shafting, making them a key component in ensuring the stable operation of the entire system. They must not only withstand the harsh conditions of high temperatures but also ensure the smooth and efficient operation of the main pump shafting. Any performance issues with these bearings can severely impact the normal operation of the main pump, threatening the safety and stability of the entire reactor system.

[0003] Currently, most existing liquid metal reactor main pump bearing performance testers on the market use a horizontal design. Due to the high temperature of liquid lead and bismuth, if the test device fails to consider heat dissipation and sealing issues, it will not only pose a safety hazard but also affect the accuracy and stability of the test. Summary of the Invention

[0004] Based on this, it is necessary to provide a liquid metal reactor main pump bearing performance test device and test system to address the high temperature and sealing problems of the high-temperature liquid metal medium test device.

[0005] The embodiment of the first aspect of the present application provides a liquid metal reactor main pump bearing performance testing device, the liquid metal reactor main pump bearing performance testing device comprising:

[0006] A container, wherein a test medium is placed at the bottom of the container, a gas phase space is left above the test medium, a bearing seat is provided in the container, the bearing seat is used to mount a bearing to be tested, and the bearing to be tested is immersed in the test medium;

[0007] A connecting assembly, the connecting assembly comprising a rotating shaft rotatably connected to the container, the bearing to be tested being connected to the rotating shaft;

[0008] A loading assembly includes a loading device, which is installed on the container and is used to apply a loading force to the bearing being tested.

[0009] In one embodiment, the container is provided with a flange, and a dynamic sealing structure is provided between the flange and the rotating shaft to ensure the airtightness of the gas phase space, and the gas phase space is configured to be positive pressure.

[0010] In one embodiment, a water-cooling chamber and a heat-insulating chamber are provided in the container. The water-cooling chamber is provided above the flange, and the heat-insulating chamber is provided below the flange and located in the gas phase space.

[0011] In one embodiment, the rotating shaft is configured as a hollow shaft; and / or

[0012] An upper bearing is also provided in the container, and the upper bearing and the measured bearing jointly support the rotating shaft.

[0013] In one embodiment, the liquid metal reactor main pump bearing performance testing device further includes:

[0014] a driving member connected to the rotating shaft to drive the rotating shaft to rotate;

[0015] A torque meter is connected between the driving member and the rotating shaft and is used to collect the torque of the rotating shaft.

[0016] In one embodiment, the container is provided with an inlet and an outlet, and the inlet and the outlet are respectively located at two ends of the bearing seat and the tested bearing;

[0017] The area of ​​the container where the inlet is arranged is a high pressure area;

[0018] The area of ​​the container where the outlet is arranged is a low-pressure area.

[0019] In one embodiment, the loading component further includes:

[0020] A loading spring is connected between the loading device and the rotating shaft, and the loading device applies a loading force to the tested bearing through the loading spring and the rotating shaft.

[0021] In one embodiment, the loading component further includes:

[0022] a loading bearing connected to the rotating shaft;

[0023] One end of the loading spring is connected to the loading bearing, and the other end is connected to the output end of the loading device.

[0024] In one embodiment, the loading component further includes:

[0025] A force sensor is installed between the loading device and the loading spring, and is used to collect the magnitude of the loading force.

[0026] In one embodiment, the liquid metal reactor main pump bearing performance testing device further includes:

[0027] An unloading assembly includes an unloading device installed on the container and used to apply a reverse loading force to the rotating shaft to reset the rotating shaft after the test.

[0028] In one embodiment, the loading device and the unloading device are arranged on the same horizontal plane, and the loading device and the unloading device are arranged at 180° to each other.

[0029] In one embodiment, the uninstall component further includes:

[0030] A displacement sensor is communicatively connected to the unloading device, and is used to detect whether the rotating shaft is reset.

[0031] In one embodiment, the liquid metal reactor main pump bearing performance testing device further includes:

[0032] A balancing disc, the balancing disc being mounted on the rotating shaft and rotating with the rotating shaft, the balancing disc being configured to adjust the unbalanced mass within a preset range, and adjusting the dynamic unbalanced force applied to the rotating shaft by changing the dynamic unbalance of the balancing disc; and / or

[0033] The container is connected to a motor bracket, the loading device is installed outside the motor bracket, and the output end of the loading device extends into the motor bracket to apply a static loading force to the tested bearing.

[0034] In one embodiment, the loading device is configured to output a dynamic loading force and a static loading force with adjustable loading force magnitude.

[0035] An embodiment of the second aspect of the present application provides a testing system, wherein the bearing performance testing system comprises:

[0036] A liquid metal reactor main pump bearing performance testing device as described in any one of the above embodiments;

[0037] a liquid storage unit, the liquid storage unit being used to store a test medium;

[0038] A delivery unit is connected to the liquid storage unit and the liquid metal reactor main pump bearing performance test device, and is used to deliver the test medium in the liquid storage unit to the liquid metal reactor main pump bearing performance test device.

[0039] In one embodiment, the bearing performance testing system further comprises:

[0040] a filter unit connected between the liquid storage unit and the inlet of the liquid metal reactor main pump bearing performance test device, and configured to filter impurities in the test medium;

[0041] a pressure regulating unit connected to the inlet and outlet of the liquid metal reactor main pump bearing performance testing device and configured to regulate the pressure of the test medium entering the liquid metal reactor main pump bearing performance testing device;

[0042] A flow regulating unit is connected to the outlet of the liquid metal reactor main pump bearing performance testing device and is used to regulate the flow of the test medium entering the liquid metal reactor main pump bearing performance testing device.

[0043] In one embodiment, the bearing performance testing system further comprises:

[0044] Isolation units are respectively arranged at the inlet and outlet of the liquid metal reactor main pump bearing performance test device, and are used to isolate the liquid metal reactor main pump bearing performance test device in the bearing performance test system.

[0045] According to the liquid metal reactor main pump bearing performance test device and test system of the present application, the test medium can be configured as a high-temperature liquid metal medium according to the test requirements. The liquid metal reactor main pump bearing performance test device immerses the tested bearing in the test medium while simultaneously performing a performance test on the tested bearing. The test medium is contained at the bottom of the container, and a gaseous space is left above the test medium, forming a vertical container structure. The test medium accumulates downward due to gravity, reducing the impact of the liquid high-temperature metal medium on the shaft seal, reducing the difficulty of shaft sealing, and mitigating the risk of leakage of the high-temperature liquid metal medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a structural schematic diagram of a liquid metal reactor main pump bearing performance testing device according to an embodiment of the present application.

[0047] Figure 2 This is a partial structural diagram of a liquid metal reactor main pump bearing performance testing device according to an embodiment of the present application.

[0048] Figure 3 This is an orientation diagram of a loading device and an unloading device in a liquid metal reactor main pump bearing performance testing device according to an embodiment of the present application.

[0049] Figure 4 This is a schematic structural diagram of a balancing disk in a liquid metal reactor main pump bearing performance testing device according to an embodiment of the present application.

[0050] Figure 5 Schematic diagram of a bearing performance testing system according to an embodiment of the present application.

[0051] Reference numerals:

[0052] 1000. Liquid metal reactor main pump bearing performance test device;

[0053] 100, container; 110, inlet; 120, outlet; 130, bearing seat; 140, motor bracket;

[0054] 200, upper bearing;

[0055] 300, bearing under test;

[0056] 400, rotating shaft; 410, tested sleeve; 420, coupling;

[0057] 500, loading device; 510, loading spring; 520, loading bearing; 530, force sensor;

[0058] 600, flange; 610, dynamic sealing structure; 630, water cooling chamber; 640, thermal insulation chamber;

[0059] 700, driving part; 710, torque meter;

[0060] 800, unloading device; 810, displacement sensor;

[0061] 900, balance plate;

[0062] 2000, storage tank;

[0063] 3000, lead-bismuth pump;

[0064] 4000, first filter; 4100, second filter;

[0065] 5000, import pressure transmitter; 5100, export pressure transmitter;

[0066] 6000, flow meter;

[0067] 7000, first valve; 7100, second valve; 7200, third valve. DETAILED DESCRIPTION

[0068] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0069] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0070] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0071] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0072] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0073] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0074] See Figure 1 and Figure 2 At least one embodiment of the present application proposes a liquid metal reactor main pump bearing performance test device 1000, which includes a container 100, a connecting assembly, and a loading assembly. The bottom of the container 100 is filled with a test medium, and a gas phase space is left above the test medium. A bearing seat 130 is provided in the container 100, and the bearing seat 130 is used to install the tested bearing 300, and the tested bearing 300 is immersed in the test medium. The connecting assembly includes a rotating shaft 400 rotatably connected to the container 100, and the tested bearing 300 is connected to the rotating shaft 400. The loading assembly includes a loading device 500, which is installed on the container 100 and is used to apply a loading force to the tested bearing 300.

[0075] Among them, the test medium can be configured as a high-temperature liquid metal medium according to the test requirements, and the high-temperature liquid metal medium includes lead or lead-bismuth, etc. Some embodiments of the present application take high-temperature lead-bismuth medium as an example. The tested bearing 300 is immersed in the high-temperature liquid lead-bismuth medium, which can simulate the real working state of the lead-bismuth bearing in the main circulation system of the fourth-generation liquid metal reactor to the greatest extent. In actual application scenarios, the lead-bismuth bearing works in the lubrication environment of high-temperature liquid lead-bismuth. By completely immersing the tested bearing 300 in the test device, it can fully interact with the test medium. The bearing performance data obtained during the test process can better reflect the real performance of the bearing in actual operation, and provide a strong basis for evaluating the applicability and reliability of the bearing in the reactor.

[0076] According to the liquid metal reactor main pump bearing performance testing device 1000 of the present application, the liquid metal reactor main pump bearing performance testing device 1000 immerses the tested bearing 300 in a test medium while simultaneously performing a performance test on the tested bearing 300. The test medium is contained at the bottom of the container 100, and a gaseous space is left above the test medium, forming a vertical structure of the container 100. The test medium accumulates downward due to gravity, reducing the impact of the high-temperature liquid metal medium on the shaft seal, simplifying the shaft seal difficulty, fundamentally improving the sealing conditions, and mitigating the risk of leakage of the high-temperature liquid metal medium.

[0077] In some embodiments, the container 100 is provided with an inlet 110 and an outlet 120, which are located at opposite ends of the bearing housing 130 and the bearing under test 300. The area of ​​the container 100 where the inlet 110 is located is a high-pressure area. The area of ​​the container 100 where the outlet 120 is located is a low-pressure area. The inlet 110 and outlet 120 are used to connect to an external liquid supply to circulate the test medium within the container 100.

[0078] When the test medium circulates in the liquid metal reactor main pump bearing performance test device 1000, the combined structure of the tested bearing 300 and the bearing seat 130 will hinder the flow of the test medium. On the side of the inlet 110, due to the obstruction of the bearing seat 130 and the tested bearing 300, the test medium accumulates on this side, the pressure increases, and thus a high-pressure area is formed. On the side of the outlet 120, the pressure of the medium after being lubricated by the tested bearing 300 is lost, and it can be discharged smoothly, the pressure is relatively low, and thus a low-pressure area is formed. Therefore, it can be said that the high-pressure area and the low-pressure area are divided by the joint action of the flow characteristics of the tested bearing 300, the bearing seat 130 and the test medium.

[0079] The presence of the high-pressure zone allows the liquid metal medium entering container 100 to maintain a certain pressure. During the test process, this pressure ensures that the liquid metal medium fully fills the gaps in the tested bearing 300, forming a high-quality lubricating film, thereby ensuring the lubrication effect of the bearing. In contrast, the low-pressure zone serves to promptly discharge the used liquid metal medium and prevent excessive accumulation of the medium within container 100, thereby lest it affect the stability of the test environment. In addition, this partitioned structure also helps reduce the interference of external factors on the test environment, ensuring that parameters such as temperature and pressure remain relatively stable during the test, thereby improving the reliability and repeatability of the test results.

[0080] When the liquid metal reactor main pump bearing performance test device 1000 is started, the lead-bismuth pump 3000 will pressurize the liquid lead-bismuth in the storage tank 2000, causing it to flow into the high-pressure area of ​​the container 100 through the inlet pipe 110. Due to the pressure difference between the high-pressure area and the low-pressure area, the test medium will flow from the high-pressure area to the low-pressure area under the pressure, and then flow out of the container 100 through the outlet pipe 120 and return to the test system. This circulation process can continuously supply fresh high-temperature liquid metal medium lubrication medium to the bearing 300 under test, simulating the lubrication conditions under actual working conditions and ensuring a stable and continuous test environment. At the same time, stable medium circulation helps to remove the heat generated by the bearing during operation, maintain the relative stability of the bearing operating temperature, and avoid affecting the accuracy of the bearing performance test due to excessive temperature.

[0081] In some embodiments, the container 100 is fixedly connected to a motor bracket 140, which is also provided with an upper bearing 200. The upper bearing 200 and the tested bearing 300 jointly support the rotating shaft 400. Specifically, the tested bearing 300 is bolted to the bearing seat 130, and the bearing seat 130 is welded to the interior of the container 100. The upper bearing 200 is connected to the upper portion of the rotating shaft 400, and the tested bearing 300 is connected to the lower portion of the rotating shaft 400. Specifically, after the tested bearing 300 and the bearing seat 130 are installed, the interior of the container 100 is divided into a high-pressure zone and a low-pressure zone. The inlet 110 pipe is connected to the high-pressure zone, and the outlet 120 pipe is connected to the low-pressure zone.

[0082] The bearing 300 to be tested is installed at the lower end of the rotating shaft 400, so that the rotating shaft 400 can effectively transmit the force it is subjected to to the bearing 300 to be tested during rotation. Since the main function of the bearing is to support the rotating shaft 400 and reduce the friction during its rotation, the bearing 300 to be tested is arranged at the lower end of the rotating shaft 400, which conforms to the principle of mechanical transmission and allows the bearing to better withstand the radial force and axial force from the rotating shaft 400. At the same time, the bearing 300 to be tested is fixed to the bearing seat 130 by bolts. The bolt connection method can provide a reliable and stable fixing effect, ensuring that during the test process, the bearing 300 to be tested will not be displaced or loosened due to the action of various forces, thereby ensuring the accuracy and stability of the test. This connection method is also convenient for disassembly and replacement when testing bearings of different specifications or models, thereby improving the versatility of the test device.

[0083] Specifically, in some embodiments, the tested shaft sleeve 410 is fixed below the rotating shaft 400 and forms an organic whole together with the tested bearing 300, the rotating shaft 400, and the bearing seat 130. The tested shaft sleeve 410 can protect the rotating shaft 400, reduce direct friction and wear between the rotating shaft 400 and other components, and extend the service life of the rotating shaft 400. During the test process, the tested shaft sleeve 410 cooperates with the tested bearing 300. The tested shaft sleeve 410 can assist the tested bearing 300 in bearing part of the load and can play a certain guiding role in the operation of the tested bearing 300, so that the tested bearing 300 can distribute the force more evenly when bearing the load, ensuring its stability during the rotation process.

[0084] In some embodiments, the container 100 is provided with a flange 600, and a dynamic sealing structure 610 is provided between the flange 600 and the rotating shaft 400 to ensure the airtightness of the gas phase space, and the gas phase space is configured to be positive pressure. Specifically, the dynamic sealing structure 610 uses a mechanical seal or a dry gas seal. Whether it is a mechanical seal or a dry gas seal, it can further ensure the airtightness of the gas phase space inside the container 100 on the basis of the vertical structure, and effectively prevent the gas in the gas phase space and the high-temperature liquid metal medium from overflowing from the gap between the rotating shaft 400 and the container 100 and the flange 600. The gas phase space is configured to be slightly positive pressure. The slightly positive pressure environment makes it difficult for outside air to enter the interior of the container 100, avoiding the contamination of the high-temperature liquid metal medium by air and the problem of sealing failure that may be caused by the entry of air, and plays an important role in maintaining the stability and reliability of the dynamic seal, thereby ensuring that the high-temperature liquid metal medium will not leak out.

[0085] In some embodiments, a water-cooling chamber 630 and a heat-insulating chamber 640 are provided within the container 100. The water-cooling chamber 630 is located above the flange 600, while the heat-insulating chamber 640 is located below the flange 600 and within the gas phase. The water-cooling chamber 630 removes heat through circulating water, while the heat-insulating chamber 640 reduces heat transfer from high-temperature liquid lead and bismuth to components above the flange 600, thereby lowering the temperature at the shaft seal, preventing degradation of the sealing material due to high temperatures, ensuring the effectiveness of the dynamic seal, and indirectly preventing leakage of the high-temperature liquid metal medium.

[0086] The container 100 in the embodiment of the present application is filled with a test medium, which provides a lubrication and working environment close to the actual working conditions for the tested bearing 300. A gas phase space is left at the top, which helps to slow down the rate of heat loss. Because the thermal conductivity of the gas phase is relatively low, it plays a heat-insulating role to a certain extent, reducing the heat exchange between the high-temperature liquid metal medium and the external environment, making the high-temperature environment in the container 100 more stable, thereby ensuring that the tested bearing 300 is tested under relatively constant high-temperature conditions, and improving the accuracy and reliability of the test results. At the same time, in conjunction with the water-cooling chamber 630 and the heat-insulating chamber 640 provided in the container 100, the gas phase space further optimizes the heat dissipation structure of the entire device, ensuring that other parts of the device will not be affected by excessively high temperatures and affect normal operation.

[0087] In some embodiments, the rotating shaft 400 is configured as a hollow shaft. The water cooling chamber 630, the heat insulation chamber 640 and the hollow shaft are used to reduce heat transfer from the high-temperature liquid lead and bismuth to the container 100 and the components on the flange 600.

[0088] In some embodiments, the liquid metal reactor main pump bearing performance testing apparatus 1000 further includes a driver 700, which is connected to the rotating shaft 400 to drive the rotating shaft 400 to rotate. Specifically, the driver 700 is configured as a variable frequency motor, and the variable frequency motor and the rotating shaft 400 are connected by a coupling. The rotation speed of the rotating shaft 400 can be adjusted by adjusting the speed of the variable frequency motor.

[0089] In some embodiments, the liquid metal reactor main pump bearing performance testing apparatus 1000 further includes a torque meter 710, which is connected between the driver 700 and the rotating shaft 400 and is used to collect torque from the rotating shaft 400. Specifically, the torque meter 710 is located between the coupling and the rotating shaft 400. A coupling 420 is connected between the torque meter 710 and the driver 700 to collect torque from the rotor system.

[0090] In some embodiments, the loading assembly further includes a loading spring 510 , which is connected between the loading device 500 and the rotating shaft 400 . The loading device 500 applies a loading force to the tested bearing 300 through the loading spring 510 and the rotating shaft 400 .

[0091] In the primary circulation system of a fourth-generation liquid metal reactor (GEN4) lead-bismuth bearing is subject to various forces from the shafting system. The combination of a loading device 500 and a loading spring 510 can simulate these actual stress conditions. The loading device 500 acts as a power source, providing the force to apply the force. Available in various types, such as electric, hydraulic, or pneumatic, the loading device 500 is capable of applying both dynamic and static loads, and the loading force is adjustable. This allows the test device to perform diverse tests, including static loading tests to simulate bearing performance under stable conditions, and dynamic loading tests to simulate the alternating loads experienced by bearings during actual operation. The loading spring 510 acts as a buffer and adjusts the loading force, making the applied force more stable and controllable. By compressing the loading spring 510 through the loading device 500, the loading force is transferred to the loading bearing 520, which then distributes it to the bearing under test 300. This simulates the loads experienced by lead-bismuth bearings under different operating conditions during actual operation, making the test environment more realistic.

[0092] In some embodiments, the loading assembly further includes a loading bearing 520, which is connected to the rotating shaft 400. A loading spring 510 is connected to the loading bearing 520 at one end and to the output of the loading device 500 at the other end. The outer ring of the loading device 500 is floating and not fixed to the stationary bearing seat 130. The loading device 500 compresses the loading spring 510, applying an inward loading force to the loading bearing 520. The loading bearing 520 then distributes the loading force to the upper bearing 200 and the bearing under test 300 via the rotating shaft 400.

[0093] In some embodiments, the loading assembly further includes a force sensor 530 , which is installed between the loading device 500 and the loading spring 510 to collect the magnitude of the loading force.

[0094] In some embodiments, the liquid metal reactor main pump bearing performance testing apparatus 1000 further includes an unloading assembly, which includes an unloading device 800. The unloading device 800 is mounted on the motor bracket 140 and is used to apply a reverse loading force to the rotating shaft 400 to reset the rotating shaft 400 after the test. If the rotating shaft 400 does not return to its original position after the test, the unloading device 800 is used to return the rotating shaft 400 to its original position to ensure that the rotating shaft 400 is centered before the test.

[0095] In some embodiments, the loading device 500 and the unloading device 800 are disposed on the same horizontal plane, and the loading device 500 and the unloading device 800 are arranged at 180° to each other.

[0096] In some embodiments, the loading device 500 is configured as an electric servo cylinder and is installed at a position corresponding to the middle of the rotating shaft 400. Figure 3 Specifically, two groups of loading devices 500 are provided, and the two groups of loading devices 500 are arranged at 180° to each other; two groups of unloading devices 800 are provided, and the two groups of unloading devices 800 are arranged at 180° to each other; that is, the loading devices 500 and the unloading devices 800 are arranged at 90° intervals.

[0097] See Figure 2 In some embodiments, the unloading assembly further includes a displacement sensor 810, which is in communication with the unloading device 800 and is used to detect whether the rotating shaft 400 has been reset. Specifically, two displacement sensors 810 are provided, and the two displacement sensors 810 are arranged at 90 degrees to each other. After the test is completed, it is determined whether the rotating shaft 400 has returned to its original position by loading the displacement sensor 810 between the bearing 520 and the dynamic seal. If the rotating shaft 400 has not returned to its original position, the unloading device 800 is used to apply a reverse force to the rotating shaft 400 to return the rotating shaft 400 to its original position.

[0098] See Figure 2 and Figure 4In some embodiments, the liquid metal reactor main pump bearing performance testing device 1000 further includes a balancing disc 900, which is mounted on the rotating shaft 400 and rotates with the rotating shaft 400. The balancing disc 900 is configured to adjust the unbalanced mass within a preset range. The dynamic unbalanced force applied to the rotating shaft 400 is adjusted by varying the dynamic unbalance of the balancing disc 900. Specifically, the tested shaft sleeve 410 and the balancing disc 900 and other components work in conjunction. The balancing disc 900 is mounted on the tested shaft sleeve 410 and rotates with the rotating shaft 400. The dynamic unbalanced force applied to the rotating shaft 400 is adjusted by adjusting the dynamic unbalance of the balancing disc 900, thereby simulating the complex stress conditions that the tested bearing 300 may encounter in actual operation. When the loading device 500 and the balancing disc 900 are jointly loaded, both static loading force and dynamic alternating force can be applied to the rotating shaft 400, simulating the actual stress of the tested bearing 300 and achieving a more comprehensive and realistic performance test.

[0099] In some embodiments, an unbalanced mass may be created by welding a piece above the balancing disc 900 , and the balancing disc 900 may be used to adjust the dynamic unbalanced force applied to the rotating shaft 400 .

[0100] In some embodiments, the loading device 500 is mounted outside the motor bracket 140, and the output end of the loading device 500 extends into the motor bracket 140 to apply a loading force to the bearing 300 under test. With this arrangement, the loading device 500 is located in a low-temperature area outside the motor bracket 140, and the operating temperature of the loaded bearing 520 is relatively low, thereby extending its service life.

[0101] In some embodiments, the loading device 500 is configured to output a dynamic loading force and a static loading force with adjustable loading force magnitude.

[0102] In some embodiments, the tested bearing 300 is a hydrodynamic bearing, and the loading device 500 can be a hydraulic device or a pneumatic device; when a hydraulic device is selected as the loading device 500, a steady-state static pressure or an alternating force can be applied to the loading bearing 520.

[0103] See Figure 5 At least one embodiment of the present application provides a testing system, comprising a bearing performance testing system comprising a liquid metal reactor main pump bearing performance testing device 1000 according to any of the aforementioned embodiments, a liquid storage unit, and a delivery unit. The liquid storage unit is configured to store a test medium. The delivery unit is connected to the liquid storage unit and the liquid metal reactor main pump bearing performance testing device 1000 to deliver the test medium in the liquid storage unit to the liquid metal reactor main pump bearing performance testing device 1000.

[0104] According to the bearing performance testing system of the embodiment of the present application, the test medium can be configured as a high-temperature liquid metal medium, and the test medium in the liquid metal reactor main pump bearing performance testing device 1000 is circulated and supplied to test the bearing 300 under test.

[0105] Specifically, in some embodiments, the liquid storage unit includes a storage tank 2000, and the delivery unit includes a lead-bismuth pump 3000. The lead-bismuth pump 3000 is connected between the inlet 110 of the liquid metal reactor main pump bearing performance testing device 1000 and the storage tank 2000. The lead-bismuth pump 3000 supplies high-pressure lead-bismuth liquid to the liquid metal reactor main pump bearing performance testing device 1000. The lead-bismuth pump 3000 can perform both dynamic pressure bearing tests and dynamic and static pressure bearing tests, providing a fully functional testing device.

[0106] In some embodiments, the bearing performance testing system further includes a filtration unit connected between the liquid storage unit and the inlet 110 of the liquid metal reactor main pump bearing performance testing apparatus 1000 to filter impurities from the test medium, thereby ensuring the purity of the lead and bismuth entering the liquid metal reactor main pump bearing performance testing apparatus 1000.

[0107] In some embodiments, the filtration unit includes at least two filters, one located on either side of the lead-bismuth pump 3000. Multiple filters achieve dual or multiple filtration. Specifically, the filtration unit includes a first filter 4000 and a second filter 4100. The first filter 4000 is located between the storage tank 2000 and the lead-bismuth pump 3000 and is used to filter the test medium output from the storage tank to reduce impurities entering the lead-bismuth pump 3000. The second filter 4100 is located between the lead-bismuth pump 3000 and the inlet 110 of the liquid metal reactor main pump bearing performance testing apparatus 1000 to further filter the test medium and further reduce impurities entering the liquid metal reactor main pump bearing performance testing apparatus 1000.

[0108] In some embodiments, the bearing performance testing system also includes a pressure regulating unit, which is connected to the inlet 110 and outlet 120 of the liquid metal reactor main pump bearing performance testing device 1000 and is used to regulate the pressure of the test medium entering the liquid metal reactor main pump bearing performance testing device 1000.

[0109] Specifically, the pressure regulating unit includes an inlet pressure transmitter 5000 and an outlet pressure transmitter 5100 , which are respectively installed at the inlet 110 and the outlet 120 of the bearing testing device to measure the liquid supply pressure of the tested bearing 300 .

[0110] In some embodiments, the bearing performance testing system further includes a flow regulating unit, which is connected to the outlet 120 of the liquid metal reactor main pump bearing performance testing device 1000 and is used to regulate the flow of the test medium entering the liquid metal reactor main pump bearing performance testing device 1000.

[0111] Specifically, the flow regulating unit includes a flow meter 6000 , which is installed at the outlet 120 of the liquid metal reactor main pump bearing performance testing device 1000 to monitor the lead-bismuth liquid supply flow of the tested bearing 300 .

[0112] Furthermore, the inlet 110 is connected to the high-pressure area, and an inlet pressure transmitter 5000 is installed at this location. This can accurately measure the pressure of the liquid metal medium entering the high-pressure area of ​​the container 100 in real time, and understand the liquid supply pressure of the tested bearing 300. The outlet 120 pipe is connected to the low-pressure area, and the lead-bismuth pressure transmitter at the outlet 120 is installed here to measure the pressure of the liquid metal medium flowing out of the container 100. By combining the difference in the pressure between the inlet and outlet 120 and other parameters, data such as the flow resistance of the medium in the test device can be calculated. This data provides an important basis for evaluating the performance of the tested bearing 300, such as lubrication performance and sealing performance. In addition, a flow meter 6000 is installed at the outlet 120 pipe position to monitor the lead-bismuth liquid supply flow of the tested bearing 300. The flow data is combined with the pressure data to more comprehensively reflect the working status of the tested bearing 300 during the test process, which helps to deeply analyze the performance of the bearing.

[0113] In some embodiments, the bearing performance testing system also includes an isolation unit, which is respectively arranged at the inlet 110 and the outlet 120 of the liquid metal reactor main pump bearing performance testing device 1000, and is used to isolate the liquid metal reactor main pump bearing performance testing device 1000 in the bearing performance testing system.

[0114] Specifically, the isolation unit includes multiple valves, specifically a first valve 7000, a second valve 7100, and a third valve 7200. The first valve 7000 and the second valve 7100 are respectively installed at the inlet 110 and outlet 120 of the liquid metal reactor main pump bearing performance test device 1000. Closing the first valve 7000 and the second valve 7100 isolates the test device from the main pump. The isolation unit also includes a third valve 7200, which is located between the storage tank 2000 and the lead-bismuth pump 3000 and is used to control the connection between the storage tank 2000 and the lead-bismuth pump 3000.

[0115] Specifically, in some embodiments, the valve is configured as an electric valve.

[0116] The working principle of the bearing performance testing system in the embodiment of the present application is:

[0117] Lead and bismuth are pressed into the bearing performance test system from storage tank 2000 by high-pressure gas. After opening third valve 7200, the lead and bismuth pass through first filter 4000, then flow through lead-bismuth pump 3000, and then through the second filter within the bearing performance test system. The first and second valves 7000 and 7100 within the bearing performance test system are opened, and the lead and bismuth are connected to inlet 110 of the liquid metal reactor main pump bearing performance test device 1000 through inlet pressure transmitter 5000. Then, the lead and bismuth pass through outlet pressure transmitter 5100 within the liquid metal reactor main pump bearing performance test device 1000, and then through flowmeter 6000. Once the lead and bismuth in storage tank 2000 reach a certain level, third valve 7200 is closed, thus completing the test system.

[0118] When the bearing 300 under test is a dynamic or static pressure bearing, lead and bismuth are first pressed into the bearing performance test system from a storage tank 2000 using high-pressure gas. The third valve 7200 is opened, and after passing through the first filter 4000, the lead and bismuth flow through the lead-bismuth pump 3000, pressurizing the bearing performance test system. The lead then passes through the second filter 4100 within the bearing performance test system. The first and second valves 7000 and 7100 within the bearing performance test system are opened, and the lead is connected from the inlet pressure transmitter 5000 to the inlet 110 of the liquid metal reactor main pump bearing performance test device 1000. The lead then passes through the outlet pressure transmitter 5100 of the liquid metal reactor main pump bearing performance test device 1000, and then through the flowmeter 6000. Once the lead and bismuth in the storage tank 2000 reach a certain level, the third valve 7200 is closed, thus establishing the static pressure bearing test system. Adjust the inlet 110 pressure and circuit flow of the bearing performance test device to realize external fluid supply of dynamic and static pressure bearings and static pressure bearings.

[0119] When the bearing 300 to be tested is a hydrodynamic bearing, the valve of the isolation unit is closed, the liquid metal reactor main pump bearing performance test device 1000 is isolated, and the test is directly performed inside the liquid metal reactor main pump bearing performance test device 1000.

[0120] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A liquid metal reactor main pump bearing performance testing device, characterized in that: The liquid metal reactor main pump bearing performance testing device includes: A container, wherein a test medium is placed at the bottom of the container, a gas phase space is left above the test medium, a bearing seat is provided in the container, the bearing seat is used to mount a bearing to be tested, and the bearing to be tested is immersed in the test medium; A connecting assembly, the connecting assembly comprising a rotating shaft rotatably connected to the container, the bearing to be tested being connected to the rotating shaft; A loading assembly includes a loading device, which is installed on the container and is used to apply a loading force to the bearing being tested.

2. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The container is provided with a flange, and a dynamic sealing structure is provided between the flange and the rotating shaft to ensure the airtightness of the gas phase space. The gas phase space is configured to be at a positive pressure.

3. The liquid metal reactor main pump bearing performance testing device according to claim 2, characterized in that: A water-cooling cavity and a heat-insulating cavity are provided in the container. The water-cooling cavity is provided above the flange, and the heat-insulating cavity is provided below the flange and located in the gas phase space.

4. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The rotating shaft is configured as a hollow shaft; and / or The liquid metal reactor main pump bearing performance testing device is further provided with an upper bearing, and the upper bearing and the tested bearing jointly support the rotating shaft.

5. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The liquid metal reactor main pump bearing performance testing device also includes: a driving member connected to the rotating shaft to drive the rotating shaft to rotate; A torque meter is connected between the driving member and the rotating shaft and is used to collect the torque of the rotating shaft.

6. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The container is provided with an inlet and an outlet, and the inlet and the outlet are respectively disposed at two ends of the bearing seat and the tested bearing; The area of ​​the container where the inlet is arranged is a high pressure area; The area of ​​the container where the outlet is arranged is a low-pressure area.

7. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The loading component also includes: A loading spring is connected between the loading device and the rotating shaft, and the loading device applies a loading force to the tested bearing through the loading spring and the rotating shaft.

8. The liquid metal reactor main pump bearing performance testing device according to claim 7, characterized in that: The loading component also includes: a loading bearing connected to the rotating shaft; One end of the loading spring is connected to the loading bearing, and the other end is connected to the output end of the loading device.

9. The liquid metal reactor main pump bearing performance testing device according to claim 7, characterized in that: The loading component also includes: A force sensor is installed between the loading device and the loading spring, and is used to collect the magnitude of the loading force.

10. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The liquid metal reactor main pump bearing performance testing device also includes: An unloading assembly includes an unloading device installed on the container and used to apply a reverse loading force to the rotating shaft to reset the rotating shaft after the test.

11. The liquid metal reactor main pump bearing performance testing device according to claim 10, characterized in that: The loading device and the unloading device are arranged on the same horizontal plane, and the loading device and the unloading device are arranged at 180 degrees to each other.

12. The liquid metal reactor main pump bearing performance testing device according to claim 11, characterized in that: The unloading assembly further includes a displacement sensor, which is communicatively connected to the unloading device and is used to detect whether the rotating shaft is reset.

13. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The liquid metal reactor main pump bearing performance testing device further comprises a balancing disc, which is mounted on the rotating shaft and rotates with the rotating shaft, and the balancing disc is configured to adjust the unbalanced mass within a preset range, and adjust the dynamic unbalanced force applied to the rotating shaft by changing the dynamic unbalance amount of the balancing disc; and / or The container is connected to a motor bracket, the loading device is installed outside the motor bracket, and the output end of the loading device extends into the motor bracket to apply a static loading force to the tested bearing.

14. The liquid metal reactor main pump bearing performance testing device according to claim 1, characterized in that: The loading device is configured to output a dynamic loading force and a static loading force with adjustable loading force magnitude.

15. A bearing performance testing system, characterized in that: The bearing performance testing system comprises: The liquid metal reactor main pump bearing performance testing device according to any one of claims 1 to 14; a liquid storage unit, the liquid storage unit being used to store a test medium; A delivery unit is connected to the liquid storage unit and the liquid metal reactor main pump bearing performance test device, and is used to deliver the test medium in the liquid storage unit to the liquid metal reactor main pump bearing performance test device.

16. The bearing performance testing system according to claim 15, characterized in that: The bearing performance testing system further comprises: a filter unit connected between the liquid storage unit and the inlet of the liquid metal reactor main pump bearing performance test device, and configured to filter impurities in the test medium; a pressure regulating unit connected to the inlet and outlet of the liquid metal reactor main pump bearing performance testing device and configured to regulate the pressure of the test medium entering the liquid metal reactor main pump bearing performance testing device; A flow regulating unit is connected to the outlet of the liquid metal reactor main pump bearing performance testing device and is used to regulate the flow of the test medium entering the liquid metal reactor main pump bearing performance testing device.

17. The bearing performance testing system according to claim 15 or 16, characterized in that: The bearing performance testing system further comprises: Isolation units are respectively arranged at the inlet and outlet of the liquid metal reactor main pump bearing performance test device, and are used to isolate the liquid metal reactor main pump bearing performance test device in the bearing performance test system.

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