A fluid-solid coupling temperature field testing device for nuclear main pump insulation device

Abstract

The present invention relates to a fluid-solid coupling temperature field testing device for a nuclear main pump thermal insulation device, comprising a shell, a support tube and a guide vane tube are arranged in the shell, a hot water cavity is formed between the guide vane tube and the shell, and the hot water cavity is used for high-temperature water circulation. The rotor assembly is rotatably connected to the shell, and is located in the support tube, and the end is connected to the motor. The thermal insulation device is sleeved on the outer periphery of the support tube and is located in the guide vane tube. A baffle device is also arranged between the thermal insulation device and the support tube, and a cooling cavity is formed between the shell, the rotor assembly, the support tube and the thermal insulation device through the baffle device, and the cooling cavity is used for cold water circulation. The temperature measuring component is arranged on the outer periphery of the shell, and the end is in contact with the cooling cavity, the hot water cavity and the thermal insulation component at multiple points, and is used to measure the temperature information of any point, compare the actually measured temperature information with the calculated theoretical data, and modify the theoretical data by optimizing the simulation model of the thermal insulation device, thereby optimizing the structural design of the thermal insulation device to ensure the reliability of the use of the nuclear main pump.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear main pump insulation device testing, and in particular to a fluid-solid coupling temperature field testing device for a nuclear main pump insulation device. Background Art

[0002] As one of the key equipment in the nuclear island, the core technology and data of the nuclear main pump are monopolized and blocked by foreign countries. The thermal insulation device is the protective barrier for the two core components of the nuclear main pump water guide bearing and mechanical seal. At present, the temperature field data of the thermal insulation device can only be obtained by calculation and analysis. However, due to the extremely high reliability requirements of the main pump, the theoretical data cannot truly reflect the operating status of the equipment. Therefore, it is necessary to use experimental means to obtain accurate data to provide accurate data support for the optimization and improvement of the nuclear main pump. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a fluid-solid coupling temperature field testing device for a nuclear main pump insulation device, which obtains real and reliable temperature field data of the insulation device through experimental means, thereby solving the technical problem in the prior art that theoretical data cannot truly reflect the operating status of the equipment.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention provides a fluid-solid coupling temperature field testing device for a nuclear main pump insulation device, and the specific technical scheme is as follows:

[0007] A fluid-solid coupling temperature field testing device for a nuclear main pump insulation device, comprising:

[0008] A shell, wherein a support cylinder and a guide vane cylinder are arranged in the shell, and a hot water cavity is arranged between the guide vane cylinder and the shell, and the hot water cavity is used for circulating high-temperature water;

[0009] The rotor assembly is arranged in the support cylinder, and the end thereof is connected to the motor;

[0010] A heat insulation device is arranged on the outer periphery of the support tube and is located inside the guide vane tube;

[0011] A baffle device is also provided between the heat insulation device and the support tube, and a cooling chamber for circulating cold water is formed between the shell, the rotor assembly, the support tube and the heat insulation device through the baffle device;

[0012] The temperature measuring component is arranged on the outer periphery of the shell and contacts the cooling cavity and the heat insulation component at multiple points, and is used to measure the temperature information of any point.

[0013] Furthermore, a base is provided at the bottom of the shell, and a motor bracket is provided at the top;

[0014] The motor is placed on the motor bracket, and the power output end is connected to the rotor assembly through a coupling;

[0015] An upper bearing body is arranged in the motor bracket, a lower bearing body is arranged in the base, and two ends of the rotor assembly are rotatably connected to the upper bearing body and the lower bearing body respectively.

[0016] Further the rotor assembly comprises:

[0017] The rotating shaft passes through the motor bracket, the upper bearing body, the housing, the support cylinder, the guide vane cylinder, the base and the lower bearing body in sequence, and is rotatably connected in the support cylinder through the water guide bearing;

[0018] The spiral supercharger and the lower shaft sleeve are sleeved on the outer periphery of the rotating shaft and fixedly connected with the rotating shaft.

[0019] Furthermore, a driving side sealing body is sleeved on the outer periphery of the driving end of the rotating shaft, and the driving side sealing body is sealed and connected to the top of the shell body to seal the cooling cavity;

[0020] A non-driving side seal is also sleeved on the outer periphery of the non-driving end of the rotating shaft. The top end of the non-driving side seal is sealed to the bottom of the guide vane tube, and the bottom end is sealed to the bottom of the shell to isolate the hot water cavity from the cooling cavity and seal the hot water cavity.

[0021] Furthermore, the cooling chamber water inlet N1 is arranged at the top of the shell, and the water outlet N2 is arranged on the non-driving end sealing body;

[0022] The hot water chamber water inlet N3 is arranged at the bottom of the shell, and the water outlet N3 is arranged on the side wall of the shell and located above the shell.

[0023] Further, it also includes a countercurrent device;

[0024] One end of the counterflow device is connected to the non-driving side sealing body and communicated with the cooling chamber, and the other end of the counterflow device is connected to the shell side wall and communicated with the hot water chamber.

[0025] Further, the backflow device includes a check valve and a stop valve;

[0026] The stop valve inlet is connected to the hot water chamber through a pipeline, the stop valve outlet is connected to the check valve inlet through a pipeline, and the check valve outlet is connected to the water outlet N2 of the cooling chamber through a pipeline.

[0027] Further, the heat insulating device comprises an upper heat insulating body and a lower heat insulating body;

[0028] The lower heat insulation body is arranged in the guide vane cylinder, the upper heat insulation body is arranged in the lower heat insulation body, and the bottom is connected with the lower heat insulation body.

[0029] Further, the temperature measurement assembly includes a plurality of temperature measurement elements;

[0030] One of the temperature measuring elements is arranged on the top of the shell, and its end is inserted into the cooling cavity. One of the temperature measuring elements is arranged on the side wall of the shell, and its end is in contact with the guide vane tube. The remaining temperature measuring elements are arranged on the side wall of the shell, and their ends are respectively in contact with the upper insulation body and the lower insulation body.

[0031] Preferably, the upper bearing body is a deep groove ball bearing, and the lower bearing body is two angular contact ball bearings, and the two angular contact ball bearings are arranged back to back.

[0032] (III) Beneficial effects

[0033] The invention provides a fluid-solid coupling temperature field testing device for a nuclear main pump thermal insulation device, which is used to perform temperature field testing on the thermal insulation device and solves the shortcomings of the prior art.

[0034] In the present invention, a shell is provided, a support tube and a guide vane tube are provided in the shell, and a hot water chamber is formed between the guide vane tube and the shell. The rotor assembly is rotatably connected to the shell and is located in the support tube, and then the baffle device is sleeved on the outer periphery of the support tube, and the heat insulation device is sleeved on the outer periphery of the baffle device and is located in the guide vane tube. A cooling zone is formed between the heat insulation device, the support tube, the rotor assembly and the shell through the baffle device, and the cooling zone is used for cooling water circulation. Furthermore, a temperature measuring component is also provided on the shell, and the temperature measuring component is in contact with the cooling chamber, the hot water chamber and the heat insulation device at multiple points, and is used to collect temperature information at any point. Among them, the guide vane cylinder simulates the guide vane setting of the nuclear main pump. During the test, the hot water cavity is filled with high-temperature water, and the high-temperature water is continuously circulated. Then the cooling cavity is filled with cold water. The cold water is continuously circulated in the cooling cavity to simulate the actual operating conditions of the nuclear main pump. The temperature field data at different points collected by the temperature measuring component are compared with the theoretical data, and then the theoretical data is proofread by optimizing the simulation model of the thermal insulation device, and then the structure of the thermal insulation device is optimized to protect the core components of the nuclear main pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 It is a cross-sectional view of the fluid-solid coupling temperature field testing device of the nuclear main pump insulation device in a specific implementation manner.

[0037] [Description of Reference Numerals]

[0038] 1. Base; 2. Lower bearing body;

[0039] 3. Non-driving side sealing body; 301. Non-driving side mechanical sealing mounting body; 302. Non-driving side mechanical seal;

[0040] 4. Countercurrent device; 401. Check valve; 402. Stop valve;

[0041] 5. Shell; 501. Lower shell; 502. Upper shell;

[0042] 6. Guide vane cylinder;

[0043] 7. Insulation device; 701. Lower insulation body; 702. Upper insulation body;

[0044] 8. Lower shaft sleeve; 9. Water guide bearing; 10. Baffle device; 11. Support cylinder; 12. Temperature measuring element; 13. Upper shaft cylinder;

[0045] 14. Driving side sealing body; 141. Driving side mechanical seal mounting body; 142. Driving side mechanical seal;

[0046] 15. Screw supercharger; 16. Rotating shaft; 17. Locking nut; 18. Upper bearing body; 19. Motor bracket; 20. Coupling; 21. Motor; 22. Lower shaft cylinder. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0048] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the scope of protection of this embodiment.

[0049] As one of the key equipment in the nuclear island, the nuclear main pump is used to drive the coolant to circulate in the reactor coolant system. Therefore, the nuclear main pump is the only rotating equipment in the nuclear island and belongs to the primary equipment of the nuclear power plant.

[0050] The heat insulation device in the nuclear main pump is the core component of the nuclear main pump, which is used to protect the rotor assembly, the water-guided bearing 9 and the sealing assembly to prevent the water-guided bearing 9 and the sealing assembly from being damaged by heat, which affects the safety of the main pump operation. At present, when designing the heat insulation device 7, a simulation model of the heat insulation device 7 is constructed, and then a finite element analysis is performed on the simulation model to obtain the theoretical temperature field data of the heat insulation device 7. However, the theoretical data cannot truly reflect the operating status of the equipment, which may easily lead to design defects in the heat insulation device 7 and affect the reliability of the use of the nuclear main pump. Therefore, there is an urgent need for a test device to obtain the real temperature field data of the heat insulation device 7 through experimental means to optimize the structural design of the heat insulation device 7.

[0051] Based on the above purpose, the present application provides an embodiment, a fluid-solid coupling temperature field test device for a nuclear main pump insulation device, comprising a shell 5, a rotor assembly, an insulation device 7 and a temperature measuring assembly. Among them, a support cylinder 11 and a guide vane cylinder 6 are arranged in the shell 5, and a hot water cavity is arranged between the guide vane cylinder 6 and the shell 5, and the hot water cavity is used for high-temperature water circulation. The rotor assembly is rotatably connected to the shell 5 and is located in the support cylinder 11. The end of the rotor assembly is connected to the motor 21, and the operation of the motor 21 can drive the rotor assembly to rotate. The heat insulation device 7 is sleeved on the outer periphery of the support tube 11 and is located in the guide vane tube 6. A deflection device 10 is also arranged between the heat insulation device 7 and the support tube 11. A cooling chamber is formed between the shell 5, the rotor assembly, the support tube 11 and the heat insulation device 7 through the deflection device 10. The cooling chamber is used for cold water circulation. The temperature measuring component is arranged on the outer periphery of the shell 5, and the end thereof contacts the cooling chamber, the hot water chamber and the heat insulation component at multiple points, and is used to measure the temperature information at any point, and compare the actually measured temperature information at any point with the calculated theoretical data. The theoretical data is proofread by optimizing the simulation model of the heat insulation device 7, and then the structural design of the heat insulation device 7 is optimized to ensure the reliability of the use of the nuclear main pump.

[0052] It can be understood that the guide vane tube 6 of this embodiment simulates the guide vane design of the nuclear main pump, the thickness of the guide vane tube 6 is consistent with the thickness of the guide vane, and the heat insulation device 7 has the function of preventing heat transfer, preventing the heat of the high-temperature water in the hot water cavity from being transferred to the rotor assembly and affecting the performance of the rotor assembly. This test device is used to verify the heat insulation performance of the heat insulation device 7, and the temperature information of multiple points in the heat insulation device 7 and the cooling cavity and the hot water cavity measured is compared with theoretical data to optimize the structural design of the heat insulation device 7.

[0053] During the specific test, first fill the hot water chamber with high-temperature water, fill the cooling chamber with cooling water, control the motor 21 to start, drive the rotor assembly to rotate, and control the high-temperature water to circulate continuously in the hot water chamber, and control the cooling water to circulate continuously in the cooling chamber to cool the rotor assembly, simulating the actual use condition of the nuclear main pump. Then, the temperature information of each point is obtained through the temperature measurement component, and the obtained temperature information is compared with the theoretical data. The theoretical data is corrected by optimizing the simulation model of the thermal insulation device 7, which solves the problem that the theoretical data in the prior art cannot truly reflect the actual operating conditions of the nuclear main pump, resulting in the thermal insulation device 7 being unable to meet the extremely high reliability use requirements of the nuclear main pump.

[0054] In this embodiment, a base 1 is provided at the bottom of the shell 5, and a motor bracket 19 is provided at the top. The motor 21 is placed on the motor 21 bracket 19, and the power output end is connected to the rotor assembly through a coupling 20; an upper bearing body 18 is provided in the motor 21 bracket 19, and a lower bearing body 2 is provided in the base 1, and the two ends of the rotor assembly are respectively rotatably connected to the upper bearing body 18 and the lower bearing body 2.

[0055] like Figure 1 As described, the base 1 and the motor bracket 19 in this embodiment are both cylinders, and flanges are arranged at both ends of the cylinder. The base 1 is connected to the bottom of the housing 5 by bolts, and the top of the housing 5 is connected to the motor bracket 19 by bolts, which is a vertical structure. The motor 21 is fixed to the top flange of the motor bracket 19, and the power output end passes through the top flange and is connected to the rotor assembly through the coupling 20. The upper bearing body 18 is arranged in the motor bracket 19, which is a deep groove ball bearing, and the lower bearing body 2 is arranged in the base 1, which is two angular contact ball bearings arranged back to back. The two ends of the rotor assembly are rotatably connected to the deep groove ball bearing and the two angular contact ball bearings. In this embodiment, the bearing arrangement method of the upper bearing body 18 and the lower bearing body 2 can well balance the axial force generated during the rotation of the rotor assembly.

[0056] The shell 5 of this embodiment includes an upper shell 502, a lower shell 501 and a cover. The lower shell 501 is fixed to the base 1 by bolts, the guide vane tube 6 is installed in the lower shell 501 by bolts, the space between the guide vane tube 6 and the lower shell 501 is a hot water chamber, the upper shell 502 is a reducing tube, the cover is arranged at the small end of the upper shell 502, and is connected to the motor bracket 19 by bolts, and the large end is connected to the guide vane tube 6 by bolts, the heat insulation device 7 is placed in the guide vane tube 6, and the top is in contact with the inner wall of the upper shell 502.

[0057] Furthermore, the rotor assembly in this embodiment includes a rotating shaft 16, a screw supercharger 15 and a lower sleeve 8. The rotating shaft 16 passes through the motor bracket 19, the upper bearing body 18, the housing 5, the support cylinder 11, the guide vane cylinder 6, the base 1 and the lower bearing body 2 in sequence, and is rotatably connected to the support cylinder 11 through a water guide bearing. The screw supercharger 15 and the lower sleeve 8 are respectively sleeved on the outer circumference of the rotating shaft 16 and fixedly connected to the rotating shaft 16.

[0058] Among them, the two ends of the rotating shaft 16 are rotatably connected to the upper bearing body 18 and the lower bearing body 2, and the ends are connected to the power output end of the motor 21. The screw supercharger 15 and the lower sleeve 8 are respectively sleeved on the outer periphery of the rotating shaft 16 through flat keys. The outer periphery of the rotating shaft 16 is also screwed with a locking nut 17, and the locking nut 17 is abutted against the lower sleeve 8. The connecting end of the rotating shaft 16 and the motor 21 is the driving end, and the end away from the motor 21 is the non-driving end. The housing is also provided with an upper shaft cylinder 13 and a lower shaft cylinder 22. The upper shaft cylinder 13 is sleeved on the outer periphery of the driving end of the rotating shaft 16. The top of the upper shaft cylinder 13 is abutted against the housing 5, and the bottom is abutted against the screw supercharger 15, which is used to divert the cooling chamber. The lower shaft cylinder 22 is connected to the shaft hole of the housing 5, and the lower sleeve 8 is rotatably connected to the lower shaft cylinder 22. A gap is provided between the outer periphery and the inner wall of the lower shaft cylinder 22, which is used to throttle the cooling chamber.

[0059] In this embodiment, a driving side seal 14 is also sleeved on the outer periphery of the driving end of the rotating shaft 16, and the driving side seal 14 is connected to the shell 5 for sealing the cooling chamber. A non-driving side seal 3 is also sleeved on the outer periphery of the non-driving end of the rotating shaft 16, and the top end of the non-driving side seal 3 is sealingly connected to the bottom of the guide vane tube 6, and the bottom end is sealingly connected to the bottom of the shell 5, so as to isolate the hot water chamber from the cooling chamber and seal the hot water chamber.

[0060] The driving side sealing body 14 includes a driving side mechanical seal mounting body 141 and a driving side mechanical seal 142. The driving side mechanical seal mounting body 141 is sleeved on the outer periphery of the rotating shaft 16 and connected to the top of the housing 5 by bolts. The driving side mechanical seal 142 is sleeved on the outer periphery of the rotating shaft 16, sealed and connected to the outer periphery of the rotating shaft 16, and installed on the driving side mechanical seal mounting body 141 by bolts to seal the cooling chamber. The non-driving side sealing body 3 includes a non-driving side mechanical seal 302 mounting body 301 and a non-driving side mechanical seal 302. The non-driving side mechanical seal 302 mounting body 301 is sleeved on the outer periphery of the rotating shaft 16, and connected to the bottom of the housing 5 by bolts, and sealed and connected to the bottom of the lower shaft cylinder 22, isolating the cooling chamber from the hot water chamber. The non-driving side mechanical seal 302 is sleeved on the outer periphery of the rotating shaft 16, sealed and connected to the outer periphery of the rotating shaft 16, and installed on the non-driving side mechanical seal 302 mounting body 301 by bolts to seal the hot water chamber.

[0061] Specifically, the cooling chamber water inlet N1 is arranged at the top of the shell 5, the water outlet N2 is arranged on the non-driving side seal 3, the hot water chamber water inlet N3 is arranged at the bottom of the shell 5, and the water outlet N4 is arranged on the side wall of the shell 5 and located at the top of the shell 5.

[0062] The cooling process is as follows: cooling water flows into the cooling chamber from the water inlet N1, then circulates in the cooling chamber, and then flows out from the cooling chamber outlet N2 to fully cool the rotating shaft 16 and the water guide bearing 9, thereby preventing the water guide bearing 9 from being damaged by heat and affecting the sealing effect and performance.

[0063] The high-temperature water pumping process is as follows: high-temperature water flows in from the water inlet N3 and then flows out from the water outlet N4, so that the guide vane tube 6 is evenly heated, simulating the actual operating conditions of the nuclear main pump in a high-temperature environment.

[0064] Furthermore, the fluid-solid coupling temperature field testing device of the nuclear main pump insulation device 7 of this embodiment also includes a countercurrent device 4, one end of which is connected to the non-driving end seal and is connected to the cooling chamber, and the other end of the countercurrent device 4 is connected to the side wall of the shell 5 and is connected to the hot water chamber.

[0065] The backflow device 4 specifically includes a check valve 401 and a stop valve 402, wherein the inlet of the stop valve 402 is connected to the hot water chamber through a hydraulic pipeline, the outlet of the stop valve 402 is connected to the inlet of the check valve 401 through a hydraulic pipeline, and the outlet of the check valve 401 is connected to the water outlet N2 of the cooling chamber through a hydraulic pipeline. By opening the stop valve 402 of the backflow device 4, the high-temperature water in the hot water chamber will flow into the cooling chamber through the hydraulic pipeline, simulating the operating accident condition of the nuclear main pump, monitoring the temperature of the cooling chamber through the temperature measuring component, and obtaining the time required for the cooling chamber temperature to rise to the limit temperature.

[0066] In this embodiment, the insulation device 7 includes an upper insulation body 702 and a lower insulation body 701, and the upper insulation body 702 and the lower insulation body 701 are both cylindrical structures, wherein the lower insulation body 701 is arranged in the guide vane tube 6, and the upper insulation body 702 is placed in the lower insulation body 701 and connected to the bottom of the tube of the lower insulation body 701.

[0067] like Figure 1 As described, a stopper is provided inside the guide vane tube 6, the lower heat insulator 701 is placed inside the guide vane tube 6, the top flange is seated at the stopper, and is fixed by bolts. The bottom of the lower heat insulator 701 is also provided with a clamping ring protruding upward, and a clamping groove is correspondingly provided at the bottom of the upper heat insulator 702. The upper heat insulator 702 is placed inside the lower heat insulator 701, and the clamping ring is clamped in the clamping groove. The top of the upper heat insulator 702 is conical and contacts the inner wall of the reduced diameter portion of the upper shell 502.

[0068] The temperature measuring assembly includes a plurality of temperature measuring elements 12, one of which is located at the top of the shell 5, and the end is inserted into the cooling cavity for measuring the temperature of the cooling cavity. One of the temperature measuring elements 12 is arranged on the shell 5, and the end is in contact with the guide vane tube 6, and the temperature of the hot water cavity is obtained through the temperature of the guide vane tube 6. The remaining temperature measuring elements 12 are respectively arranged at different positions of the shell 5, and are in contact with the upper insulation body 702 and the lower insulation body 701 at multiple points, and are used to measure the temperature information at different points of the insulation device 7. In this embodiment, the arrangement of the plurality of temperature measuring elements 12 can obtain the temperature of each point of the insulation device 7, as well as the temperature of the fluid in the hot water cavity and the cooling cavity. During the temperature measurement process, the state of the fluid in the cooling cavity and the hot water cavity is not affected, and the multi-point measurement of the insulation device 7 can reflect the temperature change gradient, so that the measured data is more real and reliable.

[0069] The above is the specific structure of the fluid-solid coupling temperature field test device of the nuclear main pump insulation device. The test device adopts a cooling water and high-temperature water diversion design. Through this test device, the high-temperature environment and the internal medium flow state of the nuclear main pump under the operating conditions and accident conditions can be simulated. At the same time, it can realize the mutual switching from operating conditions to accident conditions, so that the temperature field data obtained by the test is more real and reliable. Then, based on the measured temperature field data, it is compared with the theoretical data, and the theoretical data is corrected by optimizing the simulation model of the insulation device 7, and then the structure of the insulation device 7 is optimized to protect the core components of the nuclear main pump.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which are all covered by the protection scope of the present invention.

Claims

1. A fluid-solid coupling temperature field testing device for a nuclear main pump insulation device, characterized in that: include: A shell (5), wherein a support cylinder (11) and a guide vane cylinder (6) are arranged inside the shell (5), and a hot water cavity is arranged between the guide vane cylinder (6) and the shell (5), and the hot water cavity is used for circulating high-temperature water; A rotor assembly is disposed in the support tube (11), and an end portion is connected to the motor (21); A heat insulation device (7) is arranged on the outer periphery of the support tube (11) and is located inside the guide vane tube (6); A baffle device (10) is also provided between the heat insulation device (7) and the support tube (11), and a cooling chamber for cold water circulation is formed between the housing (5), the rotor assembly, the support tube (11) and the heat insulation device (7) through the baffle device (10); A temperature measuring component is arranged on the outer periphery of the shell (5) and is in contact with the cooling chamber, the hot water chamber and the heat insulation device (7) at multiple points, and is used to measure temperature information at any point.

2. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 1 is characterized in that: The bottom of the housing (5) is provided with a base (1), and the top is provided with a motor bracket (19); The motor (21) is placed on the motor bracket (19) and connected to the rotor assembly via a coupling (20); An upper bearing body (18) is arranged in the motor bracket (19), a lower bearing body (2) is arranged in the base (1), and two ends of the rotor assembly are rotatably connected to the upper bearing body (18) and the lower bearing body (2) respectively.

3. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 2 is characterized in that: The rotor assembly comprises: The rotating shaft (16) passes through the motor bracket (19), the upper bearing body (18), the housing (5), the support tube (11), the guide vane tube (6), the base (1) and the lower bearing body (2), and is rotatably connected to the support tube (11) through a water guide bearing (9), and the two ends of the rotating shaft (16) are rotatably connected to the upper bearing body (18) and the lower bearing body (2), and the end of the rotating shaft (16) is connected to the power output end of the motor (21); The spiral supercharger (15) and the lower shaft sleeve (8) are sleeved on the outer circumference of the rotating shaft (16) and are fixedly connected to the rotating shaft (16).

4. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 3 is characterized in that: A driving side sealing body (14) is also sleeved on the outer periphery of the driving end of the rotating shaft (16), and the driving side sealing body (14) is sealingly connected to the top of the shell (5) for sealing the cooling cavity; A non-driving side sealing body (3) is also sleeved on the outer periphery of the non-driving end of the rotating shaft (16); the top end of the non-driving side sealing body (3) is sealingly connected to the bottom of the guide vane cylinder (6), and the bottom end is sealingly connected to the bottom of the shell (5), so as to isolate the hot water chamber from the cooling chamber and seal the hot water chamber.

5. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 4 is characterized in that: The cooling chamber water inlet (N1) is arranged on the top of the shell (5), and the water outlet (N2) is arranged on the non-driving side sealing body (3); The water inlet (N3) of the hot water chamber is arranged at the bottom of the shell (5), and the water outlet (N4) is arranged on the side wall of the shell (5) and is located above the shell (5).

6. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 5 is characterized in that: Also includes a countercurrent device (4); One end of the counterflow device (4) is connected to the non-driving side sealing body (3) and communicates with the cooling chamber, and the other end of the counterflow device (4) is connected to the side wall of the shell (5) and communicates with the hot water chamber.

7. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 6 is characterized in that: The reverse flow device (4) comprises a check valve (401) and a stop valve (402); The inlet of the stop valve (402) is connected to the hot water chamber through a pipeline, the outlet of the stop valve (402) is connected to the inlet of the check valve (401) through a pipeline, and the outlet of the check valve (401) is connected to the water outlet (N2) of the cooling chamber through a pipeline.

8. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 1 is characterized in that: The heat insulation device (7) comprises an upper heat insulation body (702) and a lower heat insulation body (701); The lower heat insulator (701) is arranged in the guide vane tube (6), and the upper heat insulator (702) is arranged in the lower heat insulator (701), and the bottom is connected to the lower heat insulator (701).

9. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 8 is characterized in that: The temperature measuring component comprises a plurality of temperature measuring elements (12); One of the temperature measuring elements (12) is arranged on the top of the shell (5), and its end is arranged in the cooling chamber; one of the temperature measuring elements (12) is arranged on the side wall of the shell (5), and its end is in contact with the guide vane cylinder (6); and the remaining temperature measuring elements (12) are arranged on the side wall of the shell (5), and their ends are in contact with the upper insulation body (702) and the lower insulation body (701), respectively.

10. The fluid-solid coupling temperature field testing device for the nuclear main pump insulation device according to claim 2 is characterized in that: The upper bearing body (18) is a deep groove ball bearing, and the lower bearing body (2) is two angular contact ball bearings, which are arranged back to back.

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