Metal fast reactor main pump test model device

Abstract

The application relates to a metal fast reactor main pump test model device and belongs to the technical field of metal fast reactor main pump test equipment. The metal fast reactor main pump test model device comprises a cylinder, a cover and a dry gas seal. The cylinder forms a space for accommodating the main pump, one side of the cylinder is provided with a medium outlet along the axial direction of the cylinder, the other side is provided with an opening, and the peripheral wall of the cylinder is provided with a medium inlet and a gas inlet. The cover is used for closing the opening, the dry gas seal is arranged on the cover and is used for sealingly connecting a rotating part with the cover. The medium inlet is arranged on the peripheral wall of the cylinder, forms uniform annular inflow conditions for the main pump, the gas inlet is used for introducing inert gas into the cylinder, forms an operation environment consistent with the in-pile condition, the operation environment of the main pump in the cylinder is closer to the real situation, the simulation degree of the test is improved, and the experimental accuracy of the main pump is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of metal fast reactor main pump test equipment, specifically relating to a metal fast reactor main pump test model device. Background Technology

[0002] Metal-cooled fast reactors, as the mainstream reactor type for future nuclear fission energy development, hold a very important strategic position in the development of nuclear energy. The main pump is the core circulating power equipment in the reactor pool of a metal-cooled fast reactor, used to transport coolant. Its comprehensive performance is crucial to the safe and stable operation of the reactor, and obtaining comprehensive performance close to that of real-world conditions is an important part of the main pump development process.

[0003] Further research by the inventors revealed that fast reactors use metallic media as coolants. Metallic media have high density properties, and their flow characteristics in the main pump differ somewhat from those of clean water. Furthermore, metal fast reactors place high demands on the overall performance of the main pump. Therefore, obtaining the overall performance under real-world media conditions is a problem that urgently needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a test model device for the main pump of a metal fast reactor, which can improve the accuracy of the test of the main pump.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: This embodiment provides a test model device for a main pump of a metal fast reactor, including a cylinder, a cover, and a dry gas seal. The cylinder forms a space for accommodating the main pump. Along the axial direction of the cylinder, one side has a medium outlet, and the other side has an opening. The peripheral wall of the cylinder has a medium inlet and a gas inlet. The cover is used to close the opening, and the dry gas seal is disposed on the cover to seal the rotating component to the cover.

[0006] In some embodiments, a drive component is further included, the drive component including a motor and a transmission component, the output end of the motor being connected to the input end of the transmission component, and the output end of the transmission component being drively connected to the main pump housed in the cylinder via the mounting hole of the dry gas seal.

[0007] In some embodiments, the output end of the motor is connected to the input end of the transmission component via a coupling.

[0008] In some embodiments, a liquid level component is further included, the liquid level component including a liquid level tube, a first connecting tube and a second connecting tube, the axis of the liquid level tube being parallel to the cylinder body, the first connecting tube and the second connecting tube respectively connecting the liquid level tube and the cylinder body, the first connecting tube and the second connecting tube being spaced apart along the axial direction of the cylinder body.

[0009] In some embodiments, along the axial direction of the cylinder, the first connecting pipe is located on the side of the second connecting pipe away from the medium outlet, and the first connecting pipe is collinear with the axis of the gas inlet.

[0010] In some embodiments, the level component further includes a level gauge, the level gauge including a float housed in the level tube.

[0011] In some embodiments, the level gauge is a magnetic float level gauge.

[0012] In some embodiments, the dry gas seal further includes a stationary ring seat, a stationary ring, a rotating ring seat, a rotating ring, and an elastic element. The stationary ring seat is connected to the cylinder, the stationary ring is connected to the stationary ring seat, the rotating ring seat is connected to the rotating member, the rotating ring is movably connected to the rotating ring seat along the axial direction of the rotating member, and the stationary ring abuts against the rotating ring. The elastic element is disposed between the rotating ring seat and the rotating ring.

[0013] In some embodiments, the dry gas seal further includes a stop ring, the stop ring including a first wall, a second wall and a third wall, the first wall for the stationary ring to abut against, the second wall for the moving ring to abut against, the third wall connecting the first wall and the second wall, and surrounding the center of the stop ring, the third wall is provided with a plurality of cooling channels at intervals, two adjacent cooling channels being connected by a spiral channel, the spiral channel being disposed on the side of the third wall away from the center of the stop ring, and the cross-sectional area of ​​the cooling channel being larger than the cross-sectional area of ​​the spiral channel.

[0014] In some embodiments, the first wall and the second wall comprise an elastic material.

[0015] The present invention has the following beneficial effects: The medium inlet is used to introduce a molten metal medium into the cylinder, and the medium outlet is used to discharge the molten metal medium from the cylinder. The medium inlet is located on the circumferential wall of the cylinder, and the medium outlet is located on one axial side of the cylinder, creating uniform circumferential inflow conditions for the main pump. The molten metal medium is then discharged from the medium outlet. The gas inlet is used to introduce inert gas into the cylinder, creating an operating environment consistent with the conditions inside the reactor core. This makes the operating environment of the main pump within the cylinder closer to real-world conditions, improving the simulation accuracy of the experiment and thus enhancing the experimental accuracy of the main pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the test model device for the main pump of the metal fast reactor of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the cylindrical body of the present invention;

[0018] Figure 3This is a schematic diagram of the dry gas sealing element of the present invention;

[0019] Figure 4 for Figure 3 Enlarged view of point A;

[0020] Figure 5 This is a three-dimensional structural diagram of the abutment ring of the present invention.

[0021] Reference numerals: 1-Cylinder, 2-Medium inlet, 3-Medium outlet, 4-Gas inlet, 5-Opening, 6-Cover, 7-Dry gas seal, 8-Main pump, 9-Motor, 10-Transmission component, 11-Coupling, 12-Level pipe, 13-First connecting pipe, 14-Second connecting pipe, 15-Float, 16-Level gauge, 17-Stationary ring seat, 18-Stationary ring, 19-Moving ring seat, 20-Moving ring, 21-Elastic component, 22-Abutting ring, 23-First wall, 24-Third wall, 25-Second wall, 26-Cooling channel, 27-Spiral channel. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0023] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] See Figure 1 and Figure 2 This invention provides a test model device for a main pump of a metal fast reactor, including a cylindrical body 1, a cover 6, and a dry gas seal 7. The cylindrical body 1 forms a space for accommodating the main pump 8. Along the axial direction of the cylindrical body 1, a medium outlet 3 is provided on one side and an opening 5 is provided on the other side. A medium inlet 2 and a gas inlet 4 are provided on the peripheral wall of the cylindrical body 1. The cover 6 is used to close the opening 5, and the dry gas seal 7 is disposed on the cover 6 to seal the rotating component to the cover 6.

[0025] The cylinder 1 forms a space for accommodating the main pump 8. The main pump 8 is housed in the cylinder 1, and a metallic liquid medium is introduced into the cylinder 1 to simulate the working environment of the main pump 8.

[0026] Opening 5 is used to insert or remove the main pump 8 from the cylinder 1. Cover 6 closes opening 5, allowing the cylinder 1 to form a closed space.

[0027] The rotating component is part of the drive component used to drive the main pump 8. For example, the rotating component may be the output end of the motor 9, or the rotating component may be the output end of the transmission component 10.

[0028] The sealing principle of the dry gas seal 7 is well known to those skilled in the art and will not be elaborated here.

[0029] Specifically, the cover 6 may be provided with a through hole, and the rotating component is sequentially inserted into the mounting hole and the through hole of the dry gas seal 7, so that the rotating component can be connected to the main pump 8 for transmission. Under the action of the dry gas seal 7, the rotating component can rotate relative to the cover 6 without damaging the sealing effect of the cover 6 on the opening 5.

[0030] Medium inlet 2 is used to introduce molten metal medium into cylinder 1, and medium outlet 3 is used to discharge the molten metal medium from cylinder 1. Medium inlet 2 is located on the peripheral wall of cylinder 1, and medium outlet 3 is located on one axial side of cylinder 1, forming a uniform circumferential inflow condition for the main pump 8. The molten metal medium is then discharged from medium outlet 3. Gas inlet 4 is used to introduce inert gas into cylinder 1 to form an operating environment consistent with the conditions inside the reactor, making the operating environment of the main pump 8 in cylinder 1 closer to the real situation, improving the simulation degree of the experiment, and thus improving the experimental accuracy of the main pump 8.

[0031] In this embodiment, the cover 6 can be a separate component, or the cover 6 can be a part of the main pump 8. For example, the cover 6 can be part of the pump seat of the main pump 8.

[0032] See Figure 1 In some embodiments, a drive component is also included, which includes a motor 9 and a transmission component 10. The output end of the motor 9 is connected to the input end of the transmission component 10, and the output end of the transmission component 10 is connected to the main pump 8 housed in the cylinder 1 via the mounting hole of the dry gas seal 7.

[0033] The motor 9 is the power component that drives the main pump 8. The transmission component 10 is used to adjust the torque output from the motor 9 to the main pump 8 and to adjust the relative position of the motor 9 and the main pump 8. For example, the transmission component 10 can be a speed reducer.

[0034] In this embodiment, the output end of the transmission component 10 is a rotating component.

[0035] By starting the motor 9, the main pump 8 can work through the transmission action of the transmission component 10, thus completing the experimental process.

[0036] In some embodiments, the cylinder 1 may be provided with a motor 9 bracket to facilitate fixing the motor 9 to the cylinder 1.

[0037] See Figure 1 In some embodiments, the output end of the motor 9 is connected to the input end of the transmission component 10 via a coupling 11.

[0038] The purpose of connecting the motor 9 and the transmission component 10 is achieved by using the coupling 11.

[0039] The structure and working principle of coupling 11 are well known to those skilled in the art and will not be described in detail here.

[0040] See Figure 1 and Figure 2 In some embodiments, a liquid level component is also included, which includes a liquid level pipe 12, a first connecting pipe 13, and a second connecting pipe 14. The axis of the liquid level pipe 12 is parallel to the cylinder 1. The first connecting pipe 13 and the second connecting pipe 14 are respectively connected to the liquid level pipe 12 and the cylinder 1. The first connecting pipe 13 and the second connecting pipe 14 are spaced apart along the axial direction of the cylinder 1.

[0041] The level tube 12 is used to observe the liquid level in the cylinder 1. Under the action of the first connecting pipe 13 and the second connecting pipe 14, the liquid level in the level tube 12 can be consistent with the liquid level in the cylinder 1.

[0042] Specifically, the cylinder 1 can be in a vertical state when it is working. The first connecting pipe 13 can be located at the top of the cylinder 1 and connected to the area of ​​the cylinder 1 filled with inert gas. The second connecting pipe 14 can be located at the bottom of the cylinder 1 and connected to the area of ​​the cylinder 1 containing a metal liquid medium. The metal liquid medium enters the liquid level pipe 12 from the second connecting pipe 14. The first connecting pipe 13 makes the gas pressure in the liquid level pipe 12 the same as that in the cylinder 1.

[0043] In some embodiments, along the axial direction of the cylinder 1, the first connecting pipe 13 is located on the side of the second connecting pipe 14 away from the medium outlet 3, and the first connecting pipe 13 is collinear with the axis of the gas inlet 4.

[0044] The first connecting pipe 13 and the gas inlet 4 are collinear, so that the connection between the first connecting pipe 13 and the cylinder 1 is located in the region of the cylinder 1 filled with inert gas, which reduces the risk of inaccurate liquid level in the liquid level pipe 12.

[0045] In some embodiments, the level component further includes a level gauge 16, which includes a float 15 housed in the level tube 12.

[0046] The float 15 is housed in the level tube 12. When the liquid level in the level tube 12 changes, the position of the float 15 also changes, so that the liquid level in the level tube 12 can be observed through the float 15.

[0047] In some embodiments, the level gauge 16 is a magnetic float level gauge 16.

[0048] The magnetic float level gauge 16 has the advantages of high stability, long service life and low operating cost, and can adapt to the high temperature environment when testing the main pump 8.

[0049] The structure and working principle of the magnetic float level gauge 16 are well known to those skilled in the art and will not be described in detail here.

[0050] See Figure 3 In some embodiments, the dry gas seal 7 further includes a stationary ring seat 17, a stationary ring 18, a rotating ring seat 19, a rotating ring 20, and an elastic element 21. The stationary ring seat 17 is connected to the cylinder 1, the stationary ring 18 is connected to the stationary ring seat 17, the rotating ring seat 19 is connected to the rotating member, and the rotating ring 20 is movably connected to the rotating ring seat 19 along the axial direction of the rotating member. The stationary ring 18 abuts against the rotating ring 20. The elastic element 21 is disposed between the rotating ring seat 19 and the rotating ring 20.

[0051] The stationary ring seat 17 is used to install and fix the stationary ring 18. The stationary ring seat 17 can be a separate component or part of the cylinder 1.

[0052] The rotating ring seat 19 is connected to the rotating member, so that the rotating ring 20 can be movably connected to the rotating ring seat 19 along the axial direction of the rotating member.

[0053] The rotating ring seat 19 may be provided with a slot, into which the rotating ring 20 is inserted, so that the rotating ring 20 can move relative to the rotating ring seat 19.

[0054] The elastic element 21 provides an elastic force that allows the moving ring 20 to abut against the stationary ring 18. The elastic element 21 may be a spring.

[0055] Because the stationary ring 18 abuts against the rotating ring 20, the rotating ring 20 remains abutting against the stationary ring 18 when the rotating part rotates, so that the cylinder 1 can still remain in a closed state when the rotating part rotates.

[0056] The surfaces on which the stationary ring 18 and the rotating ring 20 abut can be provided with recesses or protrusions. The surfaces on which the rotating ring 20 and the stationary ring 18 abut can be provided with protrusions or recesses. The recess is an annular shape arranged around the axis of the rotating component, and the protrusion is inserted into the recess, which improves the sealing effect when the stationary ring 18 and the rotating ring 20 abut.

[0057] See Figure 4 and Figure 5In some embodiments, the dry gas seal 7 further includes an abutment ring 22, which includes a first wall 23, a second wall 25, and a third wall 24. The first wall 23 is used for the stationary ring 18 to abut against, the second wall 25 is used for the moving ring 20 to abut against, and the third wall 24 connects the first wall 23 and the second wall 25. Around the center of the abutment ring 22, the third wall 24 is provided with a plurality of cooling channels 26 at intervals. Two adjacent cooling channels 26 are connected by a spiral channel 27. The spiral channel 27 is located on the side of the third wall 24 away from the center of the abutment ring 22, and the cross-sectional area of ​​the cooling channel 26 is larger than the cross-sectional area of ​​the spiral channel 27.

[0058] Multiple cooling channels 26 and a spiral channel 27 between two adjacent cooling channels 26 form a cooling medium channel, which can contain the cooling medium.

[0059] The cooling medium in the cooling medium channels needs to be partially filled, on the one hand to leave space for the cooling medium to evaporate when heated, and on the other hand to allow the cooling medium to flow in the cooling medium channels. Preferably, each cooling channel 26 contains a portion of the cooling medium.

[0060] Because the metal cooling medium in the cylinder 1 is at a high temperature, and the stationary ring 18 and the moving ring 20 generate heat through friction when they move relative to each other, the temperature of the moving ring 20 and the stationary ring 18 is prone to rise.

[0061] When the moving ring 20 and the stationary ring 18 are heated, the moving ring 20 or the stationary ring 18 may deform, which will change the fit between the moving ring 20 and the stationary ring 18, thereby reducing the sealing effect of the moving ring 20 and the stationary ring 18.

[0062] The first wall 23 abuts against the stationary ring 18, the second wall 25 abuts against the moving ring 20, and the third wall 24 connects the first wall 23 and the second wall 25, so that the stationary ring 18, the moving ring 20 and the abutment ring 22 can form a sealing structure.

[0063] When the stationary ring 18, rotating ring 20, and abutment ring 22 rub against each other, the cooling medium in the third wall 24 cools them down, ensuring the sealing effect of the dry gas seal 7. Furthermore, when the abutment ring 22 rotates, because the cross-sectional area of ​​the cooling channel 26 is larger than that of the spiral channel 27, the cooling medium in the cooling channel 26 can be pumped into the spiral channel 27 under centrifugal force. The spiral channel 27 cools the cooling medium, ensuring a cooling effect when it enters the next cooling channel 26, and reducing the risk of excessive pressure in the cooling medium channel due to excessive evaporation. Since each cooling channel 26 contains cooling medium, the cooling medium can circulate between the cooling channel 26 and the spiral channel 27. For example…

[0064] The first wall 23 and the second wall 25 are connected by the third wall 24, which allows for a gap between the first wall 23 and the second wall 25, further improving the cooling effect of the first wall 23 and the second wall 25.

[0065] In order for the cooling medium in the cooling channel 26 to enter the spiral channel 27, the connection between the spiral channel 27 and the cooling channel 26 can be located on the side of the cooling channel 26 away from the axis of rotation of the rotating component, or at a suitable position such as the end of the cooling channel 26 in the direction of rotation.

[0066] The spiral structure of the spiral channel 27 increases the travel distance of the cooling medium outside the third wall 24, thereby improving the cooling effect on the cooling medium.

[0067] In some embodiments, the first wall 23 and the second wall 25 comprise an elastic material.

[0068] The first wall 23 and the second wall 25 are made of elastic material, which allows the first wall 23 and the second wall 25 to generate elastic restoring force on the stationary ring 18 and the rotating ring 20. In cooperation with the elastic element 21, the stationary ring 18, the rotating ring 20 and the abutment ring 22 can be in close contact, which improves the sealing effect of the dry gas seal 7. Furthermore, the first wall 23 and the second wall 25 can compensate for the elastic restoring force of the elastic element 21. Even if the elastic restoring force of the elastic element 21 decreases, the stationary ring 18, the rotating ring 20 and the abutment ring 22 can still be in close contact, which improves the service life of the dry gas seal 7.

[0069] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A test model device for a main pump of a metal fast reactor, characterized in that, include: The cylinder (1) forms a space for accommodating the main pump (8). Along the axial direction of the cylinder (1), a medium outlet (3) is provided on one side of the cylinder (1) and an opening (5) is provided on the other side. A medium inlet (2) and a gas inlet (4) are provided on the peripheral wall of the cylinder (1). Cover (6) for closing the opening (5); A dry gas seal (7) is provided on the cover (6) for sealing the rotating part with the cover (6); The dry gas sealing element (7) includes a stationary ring seat (17), a stationary ring (18), a rotating ring seat (19), a rotating ring (20), and an elastic element (21). The stationary ring seat (17) is connected to the cylinder (1), the stationary ring (18) is connected to the stationary ring seat (17), the rotating ring seat (19) is connected to the rotating element, the rotating ring (20) is movably connected to the rotating ring seat (19) along the axial direction of the rotating element, the stationary ring (18) abuts against the rotating ring (20), and the elastic element (21) is disposed between the rotating ring seat (19) and the rotating ring (20). The dry gas seal (7) further includes an abutment ring (22), which includes a first wall (23), a second wall (25) and a third wall (24). The first wall (23) is used for the stationary ring (18) to abut against, the second wall (25) is used for the moving ring (20) to abut against, and the third wall (24) connects the first wall (23) and the second wall (25). Around the center of the abutment ring (22), the third wall (24) is provided with a plurality of cooling channels (26) at intervals. Two adjacent cooling channels (26) are connected by a spiral channel (27). The spiral channel (27) is located on the side of the third wall (24) away from the center of the abutment ring (22). The cross-sectional area of ​​the cooling channel (26) is larger than that of the spiral channel (27).

2. The test model device for the main pump of a metal fast reactor according to claim 1, characterized in that, It also includes a drive component, which includes a motor (9) and a transmission component (10). The output end of the motor (9) is connected to the input end of the transmission component (10), and the output end of the transmission component (10) is connected to the main pump (8) housed in the cylinder (1) via the mounting hole of the dry gas seal (7).

3. The test model device for the main pump of a metal fast reactor according to claim 2, characterized in that, The output end of the motor (9) is connected to the input end of the transmission component (10) via a coupling (11).

4. The test model device for the main pump of a metal fast reactor according to claim 1, characterized in that, It also includes a liquid level component, which includes a liquid level pipe (12), a first connecting pipe (13), and a second connecting pipe (14). The axis of the liquid level pipe (12) is parallel to the cylinder (1). The first connecting pipe (13) and the second connecting pipe (14) are respectively connected to the liquid level pipe (12) and the cylinder (1). The first connecting pipe (13) and the second connecting pipe (14) are spaced apart along the axial direction of the cylinder (1).

5. The test model apparatus for the main pump of a metal fast reactor according to claim 4, characterized in that, Along the axial direction of the cylinder (1), the first connecting pipe (13) is located on the side of the second connecting pipe (14) away from the medium outlet (3), and the first connecting pipe (13) is collinear with the axis of the gas inlet (4).

6. The test model apparatus for the main pump of a metal fast reactor according to claim 4, characterized in that, The liquid level component also includes a liquid level gauge (16), which includes a float (15) housed in the liquid level tube (12).

7. The test model apparatus for the main pump of a metal fast reactor according to claim 6, characterized in that, The level gauge (16) is a magnetic float level gauge (16).

8. The test model apparatus for the main pump of a metal fast reactor according to claim 1, characterized in that, The first wall (23) and the second wall (25) are made of elastic material.

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