Liquid metal reactor main pump

Abstract

The invention relates to a liquid metal reactor main pump which comprises a front end bearing, a guide bearing and a pump shaft, and the front end bearing and the guide bearing are arranged at the two ends of the pump shaft correspondingly to jointly support the pump shaft; a pressurizing mechanism is arranged at the end, away from the front end bearing, of the guide bearing, the guide bearing is provided with a liquid medium guide-in opening and a liquid medium guide-out opening, and the pressurizing mechanism is located on the upstream of the guide-in opening and used for supplying pressurized liquid media to the guide-in opening. According to the liquid metal reactor main pump, the pressurizing mechanism can provide the high-pressure liquid medium with certain flow and pressure for the guide bearing, the bearing capacity of the guide bearing is improved, smooth operation of the guide bearing is guaranteed, and the liquid metal reactor main pump can meet the use requirements of a long shaft and low lift.

Description

Technical Field

[0001] This application relates to the technical field of nuclear reactors, and in particular to a main pump for a liquid metal reactor. Background Technology

[0002] Currently, in liquid metal reactors, the main pump is used to power the reactor cycle. However, existing main pumps are designed as cantilever structures. When the reactor vessel is long, the pump shaft also needs to be very long, making the main pump prone to significant vibration. Therefore, additional guide bearings are needed to support the pump shaft. However, most existing guide bearings have poor load-bearing capacity, making the main pump unable to meet the requirements of long shafts and low head. Summary of the Invention

[0003] Therefore, it is necessary to provide a liquid metal reactor main pump to address the problem that existing main pumps cannot meet the requirements of long shaft and low head.

[0004] A main pump for a liquid metal reactor is provided. The main pump includes a front bearing, a guide bearing, and a pump shaft. The front bearing and the guide bearing are respectively located at both ends of the pump shaft to jointly support the pump shaft. A pressurization mechanism is provided at the end of the guide bearing away from the front bearing. The guide bearing has an inlet and an outlet for liquid medium. The pressurization mechanism is located upstream of the inlet and is used to supply pressurized liquid medium to the inlet.

[0005] In the operation of the aforementioned liquid metal reactor main pump, the pump shaft is supported at both ends by a front bearing and a guide bearing. The pressurization mechanism can provide a certain flow rate and pressure of pressurized liquid medium to the guide bearing, which improves the load-bearing capacity of the guide bearing and helps to ensure the smooth operation of the guide bearing, so that the liquid metal reactor main pump can meet the usage requirements of long shaft and low head.

[0006] In some embodiments, the booster mechanism includes a housing, an impeller assembly, and a first fastener. The housing is fixedly connected to the guide bearing, the impeller assembly is housed within the housing and mounted on the pump shaft, and the first fastener is used to limit and fix the impeller assembly.

[0007] In some embodiments, the impeller assembly includes a first guide vane, a first impeller, a second guide vane, and a second impeller. The first guide vane and the second guide vane are both fixedly connected to the guide bearing and are spaced apart along the axial direction of the guide bearing. The first impeller is disposed inside the first guide vane and is mounted on the pump shaft. The second impeller is disposed inside the second guide vane and is mounted on the pump shaft.

[0008] In some embodiments, the housing has a first fixing hole and the guide bearing has a second fixing hole, and the housing is fixed to the guide bearing by means of a second fastener passing through the first fixing hole and the second fixing hole.

[0009] In some embodiments, the booster mechanism comprises a fixed part and a movable part, the fixed part is fixedly connected to the guide bearing, the movable part is accommodated in the fixed part and connected to the pump shaft, an inner periphery of the fixed part is provided with a first thread, and an outer periphery of the movable part is provided with a second thread engaged with the first thread.

[0010] In some embodiments, the guide bearing comprises a sleeve, a bearing body and a seat body, the bearing body is accommodated in the seat body and sleeved on an outer periphery of the pump shaft, and the sleeve is clamped between the bearing body and the pump shaft.

[0011] In some embodiments, the liquid metal reactor main pump further comprises a main guide vane and a main impeller, the main impeller is rotationally arranged in the main guide vane; the liquid metal reactor main pump further has a liquid inlet and a liquid outlet, the liquid outlet is arranged below the main guide vane, the liquid inlet is arranged above the main guide vane and below the guide inlet, and the booster mechanism is located between the liquid inlet and the guide inlet.

[0012] The liquid metal reactor main pump further comprises a pump body and a driving mechanism arranged in the pump body, the driving mechanism is connected to the pump shaft and used to drive the pump shaft to rotate.

[0013] In some embodiments, the driving mechanism comprises a driving member and a coupling, the driving member and the pump shaft are connected through the coupling, and the coupling is used to adjust the rotating speed of the pump shaft.

[0014] In some embodiments, the liquid metal reactor main pump is divided into a gas phase space and a liquid phase space from top to bottom along a first direction, the gas phase space and the liquid phase space are divided by a working liquid level of a liquid medium in the liquid metal reactor main pump, the first direction is an axial direction of the liquid metal reactor main pump; the pump body, the guide bearing, the pump shaft and the booster mechanism are located in the liquid phase space, and the front end bearing and the driving mechanism are located in the gas phase space.

[0015] In some embodiments, the liquid metal reactor main pump further comprises a shielding mechanism, the shielding mechanism is fixed to the pump shaft and located in the gas phase space, and the shielding mechanism is used to shield harmful rays.

[0016] In some embodiments, the liquid metal reactor main pump further comprises a cooling mechanism, a sealing mechanism and a main flange, the main flange is fixed to the pump shaft, and the main flange, the cooling mechanism and the sealing mechanism are located in the gas phase space; the sealing mechanism is mounted to the main flange and located above the shielding mechanism, the sealing mechanism is used to seal the gas phase space, and the cooling mechanism is arranged between the sealing mechanism and the shielding mechanism, and the cooling mechanism is used to cool the gas phase space. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic view of the liquid metal reactor main pump in some embodiments of the present application.

[0018] Figure 2Schematic diagram of a pressurizing mechanism in a liquid metal reactor primary pump according to some embodiments of the present application.

[0019] Figure 3 Schematic diagram of a pressurizing mechanism in a liquid metal reactor primary pump according to some embodiments of the present application.

[0020] Reference signs:

[0021] 100, pump body; 100a, pump pipe section; 100b, liquid supply section; 101, liquid inlet; 102, liquid outlet;

[0022] 210, front end bearing; 220, guide bearing; 221, shaft sleeve; 222, bearing body; 223, seat body; 230, pump shaft; 240, main guide vane; 250, main impeller;

[0023] 300, driving mechanism; 310, driving member; 320, shaft coupling;

[0024] 400, pressurizing mechanism; 410, housing; 420, impeller assembly; 421, first guide vane; 422, first impeller; 423, second guide vane; 424, second impeller; 430, first fastener; 440, second fastener; 450, fixed part; 460, movable part;

[0025] 500, shielding mechanism; 600, cooling mechanism; 700, sealing mechanism; 800, main flange. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated that the present application not be limited to the embodiments set forth in the following description.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, a feature defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "initial", "connected", "connected", "fixed" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0032] Please refer to Figures 1 to 3 In an embodiment, the liquid metal reactor pump includes a front end bearing 210, a guide bearing 220 and a pump shaft 230, the front end bearing 210 and the guide bearing 220 are respectively arranged at both ends of the pump shaft 230 to jointly support the pump shaft 230; the end of the guide bearing 220 away from the front end bearing 210 is provided with a booster mechanism 400; the guide bearing 220 has a guide inlet and a guide outlet of liquid medium, the booster mechanism 400 is located upstream of the guide inlet, and the booster mechanism 400 is used to supply the guide inlet with pressurized liquid medium.

[0033] It should be noted that the pressurizing mechanism 400 is located upstream of the guide inlet, that is, during the conveying of the liquid medium, the liquid medium first flows through the pressurizing mechanism 400 and then flows through the guide inlet. The front bearing 210 and the guide bearing 220 are respectively arranged at two ends of the pump shaft 230 along a first direction, that is, the Z direction shown, that is, the axial direction of the pump shaft 230. Figure 1

[0034] Here, the liquid medium is liquid metal. During the operation of the liquid metal reactor main pump, the low-pressure liquid metal flows into the pressurizing mechanism 400, is pressurized to high-pressure liquid medium by the pressurizing mechanism 400, and then flows into the guide bearing 220 through the guide inlet. After passing through the guide bearing 220, the pressure is reduced, and finally output from the guide outlet of the guide bearing 220 to the pool of the liquid metal reactor.

[0035] The liquid metal reactor main pump described above, during the operation of the liquid metal reactor main pump, the two ends of the pump shaft 230 are supported by the front bearing 210 and the guide bearing 220, and the pressurizing mechanism 400 can provide high-pressure liquid medium with a certain flow rate and pressure to the guide bearing 220, thereby improving the carrying capacity of the guide bearing 220 and facilitating smooth operation of the guide bearing 220, so that the liquid metal reactor main pump can meet the use requirements of long shaft and low lift.

[0036] In the embodiments of the present application, the guide outlet and the guide inlet are located at different positions of the guide bearing 220 to avoid interference between the liquid inlet and the liquid outlet. For example, the guide inlet is located below the guide bearing 220, and the guide outlet is located above the guide bearing 220.

[0037] In the embodiments of the present application, the number of guide outlets and guide inlets is not limited to one, that is, the number of guide outlets and guide inlets can be at least two different positions. Of course, in some embodiments, the number of guide inlets and guide outlets can also be inconsistent, for example, the number of guide inlets is one, and the number of guide outlets is two, which is not limited here.

[0038] In the embodiments of the present application, the liquid metal reactor main pump is a vertical structure and is fixed on the top of the pool of the liquid metal reactor, and the liquid metal reactor main pump is used to provide power for the circulation of the liquid metal reactor. The liquid metal is used as the coolant of the reactor, and the liquid metal can be liquid sodium, sodium-potassium alloy, lead, lead-bismuth alloy, etc.

[0039] ​In the embodiments of the present application, the inner ring of the front end bearing 210, the outer ring of the front end bearing 210, the inner ring of the guide bearing 220, the outer ring of the guide bearing 220 are in rolling connection, and the two ends of the pump shaft 230 are respectively inserted into the inner ring of the front end bearing 210 and the inner ring of the guide bearing 220; when the pump shaft 230 rotates around the first direction, the inner ring of the front end bearing 210 and the inner ring of the guide bearing 220 rotate with the pump shaft 230, and the outer ring of the front end bearing 210 and the outer ring of the guide bearing 220 are fixed and do not move. Optionally, the front end bearing 210 is an oil lubricated or grease lubricated bearing.

[0040] Specifically, referring to Figure 1 , the guide bearing 220 is a static pressure bearing or a dynamic-static pressure bearing.

[0041] It can be understood that the static pressure bearing relies on the oil film formed by the externally provided pressure oil to bear the load, has the advantages of high precision, low friction and no wear, and is suitable for high-precision, heavy-load or low-speed occasions. The dynamic-static pressure bearing can rely on the static pressure oil film to support at low speed or during starting, and can use the dynamic pressure oil wedge to bear at high speed, and has high reliability and bearing capacity.

[0042] Here, since the two ends of the pump shaft 230 along the first direction are supported by the front end bearing 210 and the guide bearing 220, the guide bearing 220 is a static pressure bearing or a dynamic-static pressure bearing, so that the guide bearing 220 has high reliability and bearing capacity, which is beneficial to ensure the smooth operation of the guide bearing 220. As Figure 1 and Figure 2 shown in some embodiments, the booster mechanism 400 includes a housing 410, an impeller assembly 420, and a first fastener 430, the housing 410 is fixedly connected to the guide bearing 220, the impeller assembly 420 is accommodated in the housing 410 and is installed on the pump shaft 230, and the first fastener 430 is used to limit and fix the impeller assembly 420.

[0043] It can be understood that during the operation of the liquid metal reactor pump, the pump shaft 230 rotates under the driving of the driving mechanism 300, and the impeller assembly 420 can rotate synchronously with the pump shaft 230, so as to pressurize the liquid medium entering the booster mechanism 400.

[0044] The beneficial effects here are that the impeller assembly 420 is accommodated in the housing 410 and is installed on the pump shaft 230, which improves the space utilization rate and does not hinder the rotation of the impeller assembly 420, and the structure of the booster mechanism 400 is simple and reasonable.

[0045] In the embodiments of the present application, the housing 410 has an accommodation space, and the impeller assembly 420 is accommodated in the accommodation space. Among them, the housing 410 is a hollow structure with an accommodation space, and the outer contour of the hollow structure can be a cuboid, a cylinder or other shapes, and the shape of the housing 410 is not limited here.

[0046] In the embodiments of the present application, the impeller assembly 420 is sleeved outside the pump shaft 230, and the first fastener 430 is used to limit and fix the impeller assembly 420 and the pump shaft 230 in the first direction. Specifically, the first fastener 430 is a nut, and the pump shaft 230 has a thread matched with the nut. The impeller assembly 420 is limited at a preset height position by the nut, so as to improve the situation that the impeller assembly 420 moves up and down in position during rotation.

[0047] Specifically, in some embodiments, referring to Figure 1 , the impeller assembly 420 includes a first guide vane 421, a first impeller 422, a second guide vane 423, and a second impeller 424. The first guide vane 421 and the second guide vane 423 are both fixedly connected to the guide bearing 220 and are arranged in the axial direction of the guide bearing 220. The first impeller 422 is arranged in the first guide vane 421 and is mounted on the pump shaft 230. The second impeller 424 is arranged in the second guide vane 423 and is mounted on the pump shaft 230.

[0048] It should be noted that the first guide vane 421 and the second guide vane 423 are arranged in the axial direction of the guide bearing 220, and in the first direction (i.e., the Z direction shown in Figure 1 and Figure 2 , the second guide vane 423 is located above the first guide vane 421, that is, the second impeller 424 is located above the first impeller 422. During the operation of the liquid metal reactor pump, the pump shaft 230 rotates under the drive of the drive mechanism 300, and the first impeller 422 and the second impeller 424 rotate synchronously with the pump shaft 230, so as to pressurize the liquid medium entering the pressurizing mechanism 400.

[0049] The beneficial effect here is that by arranging at least two stages of impellers to rotate, the speed of pressurizing the liquid medium entering the pressurizing mechanism 400 can be accelerated, and the pressurizing effect can be improved.

[0050] In the embodiments of the present application, the first impeller 422 and the second impeller 424 are respectively sleeved outside the pump shaft 230, and the first impeller 422 and the second impeller 424 are respectively tightly matched with the pump shaft 230, so as to avoid the situation that the first impeller 422 and the second impeller 424 move up and down in position during rotation. For example, the first impeller 422 and the second impeller 424 are respectively in interference fit with the pump shaft 230.

[0051] In the embodiment of the present application, the first guide vane 421 is fixedly connected to the seat body 223 of the guide bearing 220, and the first guide vane 421 and the seat body 223 of the guide bearing 220 are detachably connected, for example, the first guide vane 421 and the seat body 223 of the guide bearing 220 are detachably connected through clamping, insertion or threaded connection. Among them, the number of the first guide vane 421 and the first impeller 422 is not limited to one, when the number of the first guide vane 421 and the first impeller 422 is at least two, the first guide vane 421 and the first impeller 422 can be one-to-one correspondence, or at least two first impellers 422 can be arranged in the same first guide vane 421.

[0052] In the embodiment of the present application, the second guide vane 423 is fixedly connected to the seat body 223 of the guide bearing 220, and the second guide vane 423 and the seat body 223 of the guide bearing 220 are detachably connected, for example, the second guide vane 423 and the seat body 223 of the guide bearing 220 are detachably connected through clamping, insertion or threaded connection. Among them, the number of the second guide vane 423 and the second impeller 424 is not limited to one, when the number of the second guide vane 423 and the second impeller 424 is at least two, the second guide vane 423 and the second impeller 424 can be one-to-one correspondence, or at least two second impellers 424 can be arranged in the same second guide vane 423.

[0053] More specifically, please refer to Figure 1 The shell 410 has a first fixing hole, and the guide bearing 220 has a second fixing hole. The second fastener 440 is arranged in the first fixing hole and the second fixing hole to fix the shell 410 to the guide bearing 220.

[0054] It should be noted that the second fastener 440 is a bolt or a stud, and the first fixing hole and the second fixing hole are threaded holes.

[0055] The beneficial effect here is that the second fastener 440 is arranged in the first fixing hole and the second fixing hole to realize threaded cooperation, so as to fix the shell 410 to the guide bearing 220, which is simple in structure and facilitates disassembly and assembly of the shell 410 and the guide bearing 220.

[0056] In the embodiment of the present application, the first fixing hole is a circular hole, and the number of the first fixing hole is not limited to one. When the number of the first fixing hole is at least two, each first fixing hole is arranged at a different position of the shell 410 to improve the fixing effect of the shell 410 and the guide bearing 220 at different positions.

[0057] In the embodiment of the present application, the second fixing hole is a circular hole, and the number of the second fixing hole is not limited to one. When the number of the second fixing hole is at least two, each second fixing hole is arranged at a different position of the guide bearing 220 to improve the fixing effect of the shell 410 and the guide bearing 220 at different positions.

[0058] As Figure 3 In some other embodiments, the booster mechanism 400 comprises a fixed part 450 and a movable part 460, the fixed part 450 is fixedly connected to the guide bearing 220, the movable part 460 is accommodated in the fixed part 450 and connected with the pump shaft 230, the inner periphery of the fixed part 450 is provided with a first thread, and the outer periphery of the movable part 460 is provided with a second thread engaged with the first thread.

[0059] It can be understood that during the operation of the liquid metal reactor main pump, the pump shaft 230 rotates under the driving of the driving mechanism 300, the movable part 460 can rotate synchronously with the pump shaft 230, the first thread and the second thread are engaged, so as to boost the liquid medium entering the booster mechanism 400. Optionally, the booster mechanism 400 is a spiral pump.

[0060] The beneficial effects here are that the movable part 460 is accommodated in the fixed part 450 and connected with the pump shaft 230, which improves the space utilization and does not hinder the rotation of the movable part 460, and the booster mechanism 400 has a simple structure and a reasonable design.

[0061] In the embodiments of the present application, the fixed part 450 has an accommodation space, and the movable part 460 is accommodated in the accommodation space. The fixed part 450 is a hollow structure having an accommodation space, and the outer contour of the hollow structure can be a cuboid, a cylinder or other shapes, and the shape of the fixed part 450 is not limited here.

[0062] In the embodiments of the present application, the movable part 460 is a solid columnar structure, and the outer contour of the columnar structure can be cylindrical, prismatic or other shapes, and the shape of the movable part 460 is not limited here. The number of movable parts 460 is not limited to one, that is, at least two movable parts 460 can be arranged in the fixed part 450.

[0063] Please refer to Figure 1 The guide bearing 220 comprises a shaft sleeve 221, a bearing body 222 and a seat body 223, the bearing body 222 is accommodated in the seat body 223 and installed on the pump shaft 230, and the shaft sleeve 221 is clamped between the bearing body 222 and the pump shaft 230.

[0064] It should be noted that during the operation of the liquid metal reactor main pump, the pump shaft 230 rotates under the driving of the driving mechanism 300, the bearing body 222 can rotate synchronously with the pump shaft 230, and the seat body 223 is fixed.

[0065] The beneficial effects here are that the shaft sleeve 221 is clamped between the bearing body 222 and the pump shaft 230, which can avoid the situation that the bearing body 222 moves up and down in position during rotation.

[0066] In the embodiment of the present application, the seat body 223 is fixed in the pump body 100, and the seat body 223 is detachably connected with the pump body 100, for example, the seat body 223 is detachably connected with the pump body 100 through clamping, insertion or threaded connection, etc. Here, the inlet is located below the seat body 223, the outlet is located above the seat body 223, and the second fixed hole of the guide bearing 220 is arranged on the seat body 223.

[0067] In the embodiment of the present application, the shaft sleeve 221 is clamped between the bearing body 222 and the pump shaft 230, and the shaft sleeve 221 is tightly fitted with the bearing body 222 and the pump shaft 230 to avoid the position of the bearing body 222 moving up and down during rotation; for example, the shaft sleeve 221 is tightly fitted with the bearing body 222 and the pump shaft 230.

[0068] Further, please refer to Figure 1 The liquid metal reactor main pump further comprises a main guide vane 240 and a main impeller 250, and the main impeller 250 is rotatably arranged in the main guide vane 240; the liquid metal reactor main pump further has a liquid inlet 101 and a liquid outlet 102, the liquid outlet 102 is arranged below the main guide vane 240, the liquid inlet 101 is arranged above the main guide vane 240 and below the inlet, and the pressure increasing mechanism 400 is located between the liquid inlet 101 and the inlet.

[0069] It should be noted that part of the low-pressure liquid medium enters the pressure increasing mechanism 400 after entering the pump body 100 through the liquid inlet 101, and the pressure of the liquid medium is increased by the pressure increasing mechanism 400 to supply the guide bearing 220, and the pressure of the liquid medium is reduced after passing through the guide bearing 220, and finally flows into the reactor pool of the reactor from the outlet of the guide bearing 220; another part of the liquid medium flows through the main guide vane 240 along the main impeller 250, and finally flows into the reactor pool of the reactor from the liquid outlet 102. Among them, the flow of the part of the liquid medium flowing through the pressure increasing mechanism 400 is small, and the flow of the other part of the liquid medium flowing through the main guide vane 240 is large.

[0070] The beneficial effect here is that the pressure increasing mechanism 400 for supplying the guide bearing 220 and the hydraulic components (i.e. the main guide vane 240 and the main impeller 250) of the liquid metal reactor main pump work independently, and the two can have different design parameters, which can avoid the influence of the diversion of the liquid medium for supplying the guide bearing 220 from the liquid outlet 102 on the high-pressure supply of the guide bearing 220, can meet the use requirements of long shaft and low head of the liquid metal reactor main pump, can avoid the influence of the diversion of the liquid supply on the core flow, and can avoid the influence of the unstable flow of the liquid from the liquid outlet 102 on the guide bearing 220.

[0071] In the embodiments of the present application, the main vane 240 is fixed below the pump body 100, and the main vane 240 is detachably connected with the liquid supply section 100b of the pump body 100, for example, the main vane 240 is detachably connected with the liquid supply section 100b of the pump body 100 by means of clamping, plugging or threaded connection, etc. The number of the main vane 240 and the pump body 100 is not limited to one.

[0072] Please refer to Figure 1 , the liquid metal reactor pump further comprises a pump body 100 and a driving mechanism 300 arranged in the pump body 100, the driving mechanism 300 is connected with the pump shaft 230 and used to drive the pump shaft 230 to rotate.

[0073] It should be noted that under the driving of the driving mechanism 300, the pump shaft 230 rotates around the guide bearing 220 in the Z direction. Figure 1 As shown in the figure.

[0074] The beneficial effect here is that the pump shaft 230 is driven to rotate by the driving mechanism 300, which is simple and reasonable in structure design.

[0075] In the embodiments of the present application, the driving mechanism 300 is connected with the pump shaft 230, which can be directly connected or indirectly connected. For example, the driving mechanism 300 is connected with a transmission structure, and the transmission structure is connected with the pump shaft 230 to indirectly connect the driving mechanism 300 with the pump shaft 230.

[0076] In the embodiments of the present application, the pump body 100 can have various structural forms and include different functional sections, for example, the pump body 100 includes a pump pipe section 100a and a liquid supply section 100b, the pump pipe section 100a is located above the liquid supply section 100b in the Z direction, and the pump pipe section 100a can provide an installation space for the guide bearing 220, and the liquid supply section 100b can provide an installation space for the pressure increasing mechanism 400. Figure 2

[0077] Specifically, please refer to Figure 1 , the driving mechanism 300 includes a driving member 310 and a shaft coupling 320, the driving member 310 and the pump shaft 230 are connected through the shaft coupling 320, and the shaft coupling 320 is used to adjust the rotating speed of the pump shaft 230.

[0078] It can be understood that the driving member 310 is in driving connection with the shaft coupling 320, and the shaft coupling 320 is in driving connection with the pump shaft 230. Under the driving of the driving member 310, the shaft coupling 320 drives the pump shaft 230 to rotate around the first direction (i.e. the axial direction of the pump shaft 230).

[0079] ​The beneficial effect is that by adjusting the position, angle or number of the shaft couplings 320, the transmission ratio between the driving member 310 and the pump shaft 230 can be changed, so as to control the rotating speed of the pump shaft 230, so that the pump shaft 230 can meet the actual use requirements, and energy consumption can be saved.

[0080] In the embodiment of the application, the driving member 310 can be a motor or other driving structure with a power output shaft.

[0081] In the embodiment of the application, the number of the shaft couplings 320 is not limited to one, and the shaft couplings 320 can be toothed shaft couplings 320, universal shaft couplings 320, magnetic shaft couplings 320 or other types, and the number and shape of the shaft couplings 320 are not limited herein.

[0082] Please refer to Figure 1 , the liquid metal reactor pump is divided into a gas phase space and a liquid phase space from top to bottom along a first direction, the gas phase space and the liquid phase space are divided by the working liquid level of the liquid medium in the liquid metal reactor pump, the first direction is the axial direction of the liquid metal reactor pump; the pump body 100, the guide bearing 220, the pump shaft 230 and the pressure increasing mechanism 400 are located in the liquid phase space, and the front end bearing 210 and the driving mechanism 300 are located in the gas phase space.

[0083] It should be noted that the working liquid level of the liquid medium is the height position of L1 shown in Figure 1 .

[0084] The beneficial effect is that the pump body 100, the guide bearing 220, the pump shaft 230 and the pressure increasing mechanism 400 are located in the liquid phase space, and the front end bearing 210 and the driving mechanism 300 are located in the gas phase space, so that the space utilization rate of the liquid metal reactor pump in the first direction can be improved, and mutual interference of the mechanisms during operation can be avoided.

[0085] Further, please refer to Figure 1 , the liquid metal reactor pump further comprises a shielding mechanism 500, the shielding mechanism 500 is fixed to the pump shaft 230, and the shielding mechanism 500 is used for shielding harmful rays.

[0086] The beneficial effect is that by setting the shielding mechanism 500, the shielding mechanism 500 can absorb some harmful rays to the human body during operation of the liquid metal reactor pump, and the safety performance of the liquid metal reactor pump can be improved.

[0087] In the embodiment of the application, the shielding mechanism 500 is located in the gas phase space, and the shielding mechanism 500 can be in various structural forms, for example, the shielding mechanism 500 is radiation-proof boron-containing graphite to reduce radiation leakage.

[0088] Still further, please refer to Figure 1The liquid metal reactor main pump further comprises a cooling mechanism 600, a sealing mechanism 700 and a main flange 800, the main flange 800 is fixed to the pump shaft 230, and the main flange 800, the cooling mechanism 600 and the sealing mechanism 700 are located in the gas phase space; the sealing mechanism 700 is installed on the main flange 800 and above the shielding mechanism 500, the sealing mechanism 700 is used for sealing the gas phase space, the cooling mechanism 600 is arranged between the sealing mechanism 700 and the shielding mechanism 500, and the cooling mechanism 600 is used for cooling the gas phase space.

[0089] The sealing mechanism 700 is used for realizing the airtightness of the gas phase space of the liquid metal reactor main pump, and the airtightness of the liquid metal reactor main pump is ensured, and the cooling mechanism 600 is used for cooling the gas phase space, thereby facilitating heat dissipation in the gas phase space.

[0090] In the embodiment of the present application, the main flange 800 is fixed to the pump shaft 230, and the main flange 800 and the pump shaft 230 are detachably connected, for example, the main flange 800 and the pump shaft 230 are detachably connected through clamping, insertion or threaded connection.

[0091] In the embodiment of the present application, the sealing mechanism 700 is installed on the main flange 800, and the sealing mechanism 700 and the main flange 800 are detachably connected, for example, the sealing mechanism 700 and the main flange 800 are detachably connected through clamping, insertion or threaded connection.

[0092] In the embodiment of the present application, the cooling mechanism 600 is arranged between the sealing mechanism 700 and the shielding mechanism 500, and the cooling mechanism 600, the sealing mechanism 700 and the shielding mechanism 500 are detachably connected, for example, the cooling mechanism 600, the sealing mechanism 700 and the shielding mechanism 500 are detachably connected through clamping, insertion or threaded connection.

[0093] Please refer to Figures 1 to 2 The installation mode of the liquid metal reactor main pump is as follows: first, the seat body 223 is installed on the pump pipe section 100a, then the shaft sleeve 221 is installed on the pump shaft 230, then the bearing body 222 is installed on the seat body 223, then the second impeller 424 is installed on the pump shaft 230, the second guide vane 423 is installed on the seat body 223, the first guide vane 421 is installed on the seat body 223, the first impeller 422 is installed on the pump shaft 230, the liquid supply section 100b is installed on the bearing body 222, the above main pump position is fixed by using the first fastener 430, and finally the second guide vane 423, the first guide vane 421 and the liquid supply section 100b are fixed to the seat body 223 by using the second fastener 440, and the installation is completed.

[0094] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as there is no conflict, any combination of the technical features should be considered within the scope of the present disclosure.

[0095] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A liquid metal reactor primary pump characterized by: The liquid metal reactor main pump comprises a front end bearing (210), a guide bearing (220) and a pump shaft (230), The front end bearing (210) and the guide bearing (220) are respectively arranged at two ends of the pump shaft (230) to jointly support the pump shaft (230); one end of the guide bearing (220) away from the front end bearing (210) is provided with a pressurizing mechanism (400); The guide bearing (220) has a guide inlet and a guide outlet of liquid medium, the pressurizing mechanism (400) is located upstream of the guide inlet, and the pressurizing mechanism (400) is used for supplying the guide inlet with pressurized liquid medium.

2. The liquid metal reactor primary pump of claim 1, wherein, The pressurizing mechanism (400) comprises a shell (410), an impeller assembly (420) and a first fastener (430), the shell (410) is fixedly connected to the guide bearing (220), the impeller assembly (420) is accommodated in the shell (410) and is installed on the pump shaft (230), and the first fastener (430) is used for limiting and fixing the impeller assembly (420).

3. The liquid metal reactor primary pump of claim 2, wherein, The impeller assembly (420) comprises a first guide vane (421), a first impeller (422), a second guide vane (423) and a second impeller (424), the first guide vane (421) and the second guide vane (423) are both fixedly connected to the guide bearing (220) and are arranged in an axial direction of the guide bearing (220), the first impeller (422) is arranged in the first guide vane (421), the first impeller (422) is installed on the pump shaft (230), the second impeller (424) is arranged in the second guide vane (423), and the second impeller (424) is installed on the pump shaft (230).

4. The liquid metal reactor primary pump of claim 2, wherein, The shell (410) has a first fixing hole, the guide bearing (220) has a second fixing hole, and a second fastener (440) is arranged through the first fixing hole and the second fixing hole to fix the shell (410) to the guide bearing (220).

5. The liquid metal reactor primary pump of claim 1, wherein, The pressurizing mechanism (400) comprises a fixed part (450) and a movable part (460), the fixed part (450) is fixedly connected to the guide bearing (220), the movable part (460) is accommodated in the fixed part (450) and is connected with the pump shaft (230), an inner periphery of the fixed part (450) is provided with a first thread, and an outer periphery of the movable part (460) is provided with a second thread engaged with the first thread.

6. The liquid metal reactor primary pump of claim 1, wherein, The guide bearing (220) comprises a shaft sleeve (221), a bearing body (222) and a seat body (223), the bearing body (222) is accommodated in the seat body (223) and is installed on the pump shaft (230), and the shaft sleeve (221) is clamped between the bearing body (222) and the pump shaft (230).

7. The liquid metal reactor primary pump of claim 1, wherein, The liquid metal reactor main pump further comprises a main guide vane (240) and a main impeller (250), and the main impeller (250) is rotationally arranged in the main guide vane (240). The liquid metal reactor main pump further has a liquid inlet (101) and a liquid outlet (102), the liquid outlet (102) is arranged below the main vane (240), the liquid inlet (101) is arranged above the main vane (240) and below the guide inlet, and the booster mechanism (400) is located between the liquid inlet (101) and the guide inlet.

8. The liquid metal reactor primary pump of claim 1, wherein, The liquid metal reactor main pump further comprises a pump body (100) and a driving mechanism (300) arranged in the pump body (100), the driving mechanism (300) is connected with the pump shaft (230) and used for driving the pump shaft (230) to rotate.

9. The liquid metal reactor primary pump of claim 8, wherein, The driving mechanism (300) comprises a driving member (310) and a coupling (320), the driving member (310) and the pump shaft (230) are connected through the coupling (320), and the coupling (320) is used for adjusting the rotating speed of the pump shaft (230).

10. The liquid metal reactor primary pump of claim 8, wherein, The liquid metal reactor main pump is divided into a gas phase space and a liquid phase space from top to bottom along a first direction, the gas phase space and the liquid phase space are divided by the working liquid level of the liquid medium in the liquid metal reactor main pump, and the first direction is the axial direction of the liquid metal reactor main pump. The pump body (100), the guide bearing (220), the pump shaft (230) and the booster mechanism (400) are located in the liquid phase space, and the front end bearing (210) and the driving mechanism (300) are located in the gas phase space.

11. The liquid metal reactor primary pump of claim 10, wherein, The liquid metal reactor main pump further comprises a shielding mechanism (500), the shielding mechanism (500) is fixed to the pump shaft (230), and the shielding mechanism (500) is used for shielding harmful rays.

12. The liquid metal reactor primary pump of claim 11, wherein, The liquid metal reactor main pump further comprises a cooling mechanism (600), a sealing mechanism (700) and a main flange (800), the main flange (800) is fixed to the pump shaft (230), and the main flange (800), the cooling mechanism (600) and the sealing mechanism (700) are located in the gas phase space. The sealing mechanism (700) is arranged on the main flange (800) and above the shielding mechanism (500), the sealing mechanism (700) is used for sealing the gas phase space, the cooling mechanism (600) is arranged between the sealing mechanism (700) and the shielding mechanism (500), and the cooling mechanism (600) is used for cooling the gas phase space.

Images