Experiment bench device of nuclear power station drum net motor transmission system and test method thereof

Abstract

The invention discloses an experiment bench device of a drum net motor transmission system of a nuclear power station and a test method of the experiment bench device. The experiment bench device of the nuclear power station drum net motor transmission system comprises a main guide rail, a first auxiliary guide rail, a second auxiliary guide rail, a driving mechanism, a connecting shaft, a vibration loader, a displacement and vibration measurement sensor and an output load. According to the experimental bench device of the drum net motor transmission system of the nuclear power station and the test method thereof, the actual vibration working condition of field equipment can be simulated, the vibration loader is arranged to apply vibration load to the driving mechanism or the output load, and the displacement and vibration measurement sensor is arranged to obtain vibration parameter information of the driving mechanism or the output load. The device can test the vibration improvement effect of the permanent magnet coupling in the field.

Description

Technical Field

[0001] The present invention relates to the field of circulating water filtration systems in nuclear power plants, and in particular to an experimental bench device and a testing method for a drum-net motor transmission system in a nuclear power plant. Background Art

[0002] The circulating water filtration systems of many nuclear power plants provide all filtered seawater for the nuclear power units and serve as the plant's ultimate heat sink. Each unit includes two drum networks, each driven by an independent, vertically suspended reducer unit. The reducers are all vertically constructed. These reducers consist of three gearboxes, with two low-speed motors (one active and one backup) at the lower end and a medium / high-speed motor at the upper end. This vertical reducer arrangement has a high failure rate, with numerous incidents of excessive drive mechanism vibration, worm gear breakage, reducer overheating, worm gear wear, bearing fracture, and broken locking bolts. A reducer unit failure causes the drum network to shut down, leading to increased differential pressure across the drum network and unit shutdown, compromising water intake safety and posing a serious threat to nuclear safety at the power plant.

[0003] Extensive statistical analysis and multiple on-site measurements of CFI reducer video-enhanced vibration modes indicate that the motor and first-stage gearbox are rigidly integrated, and motor vibration and shaking are directly transmitted to the gearbox through the bell-mouth flange. The rigid flange connection between the motor and gearbox in vertical reducers is the root cause of vertical reducer failures. By decoupling the motor from the reducer and adopting a contactless transmission principle, the vibration defect problem can be fundamentally eliminated. This contactless transmission can utilize a permanent magnet connection to improve the reliability of critical cooling equipment. However, a device and method to verify the suitability of the permanent magnet connection for on-site optimization and upgrades is currently lacking. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a test bench device and a test method for a drum-grid motor transmission system of a nuclear power plant.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: constructing an experimental bench device for a drum-net motor transmission system of a nuclear power plant, which includes a main rail, a first auxiliary rail, a second auxiliary rail, a driving mechanism, a connecting shaft, a vibration loader, a displacement and vibration measurement sensor, and an output load;

[0006] The driving mechanism and the output load are both mounted on the main rail, and the driving mechanism is connected to the output load via the connecting shaft;

[0007] The driving mechanism includes a driving motor, a flange coupling, a permanent magnet coupling and a reducer, and the driving motor is connected to the reducer through the flange coupling or the permanent magnet coupling;

[0008] The vibration loader is mounted on the first secondary guide rail and can move on the first secondary guide rail, and the vibration loader is used to apply a vibration load to the driving mechanism or the output load;

[0009] The displacement and vibration measuring sensor is mounted on the second secondary guide rail and can move on the second secondary guide rail. The displacement and vibration measuring sensor is used to obtain vibration parameter information of the driving mechanism or the output load.

[0010] In some embodiments, the vibration loader is a mechanical vibrator, an electric vibrator, or a hydraulic vibrator.

[0011] In some embodiments, the number of the vibration loaders is six, and the six vibration loaders apply vibration loads to the driving mechanism or the device from six directions respectively.

[0012] In some embodiments, the displacement and vibration measurement sensor is a contact measurement sensor, an infrared measurement sensor, or a laser measurement sensor.

[0013] In this embodiment, a test method for an experimental bench device of a nuclear power plant drum-grid motor transmission system is also constructed. The method is based on the experimental bench device of the nuclear power plant drum-grid motor transmission system and includes the following steps:

[0014] S1. Obtaining on-site vibration parameters of the driving mechanism during on-site operation;

[0015] S2, installing the experimental bench device;

[0016] S3. Connecting the drive motor and the reducer using a flange coupling, starting the drive motor and the reducer, applying the field vibration parameters obtained in step S1 to the drive mechanism using a vibration loader, and obtaining rigid connection vibration parameters of the output load using a displacement and vibration measurement sensor;

[0017] S4. Connecting the drive motor and the reducer using a permanent magnet coupling, starting the drive motor and the reducer, applying the rigid connection vibration parameters obtained in step S3 to the output load using a vibration loader, obtaining the permanent magnet connection vibration parameters of the drive mechanism using a displacement and vibration measurement sensor, and monitoring whether the conductor disk and the permanent magnet disk of the permanent magnet coupling collide;

[0018] S5. Compare the on-site vibration parameters obtained in step S1 and the permanent magnet connection vibration parameters obtained in step S4, and determine whether optimization and upgrading are satisfied when the drive motor and the reducer are connected using the permanent magnet coupling based on whether the conductor disk and the permanent magnet disk of the permanent magnet coupling collide.

[0019] In some embodiments, step S2 includes:

[0020] Step S21: separately install the main guide rail, the first auxiliary guide rail, and the second auxiliary guide rail on the fixed structure;

[0021] Step S22: Install the driving mechanism and the output load on the main rail, and connect the driving mechanism and the output load using a connecting shaft;

[0022] Step S23: installing a vibration loader on the first secondary guide rail;

[0023] Step S24: Install a displacement and vibration measurement sensor on the second secondary guide rail.

[0024] In some embodiments, the on-site vibration parameters include an on-site axial vibration amplitude, an on-site radial vibration amplitude, and an on-site vibration frequency.

[0025] In some embodiments, the rigid connection vibration parameters include a rigid connection axial vibration amplitude, a rigid connection radial vibration amplitude, and a rigid connection vibration frequency.

[0026] In some embodiments, the permanent magnet connection vibration parameters include an axial vibration amplitude of the permanent magnet connection, a radial vibration amplitude of the permanent magnet connection, and a vibration frequency of the permanent magnet connection.

[0027] In some embodiments, in step S5, if the axial vibration amplitude of the permanent magnet connection is smaller than the on-site axial vibration amplitude, the radial vibration amplitude of the permanent magnet connection is smaller than the on-site radial vibration amplitude, the vibration frequency of the permanent magnet connection is smaller than the on-site vibration frequency, and the conductor disk and the permanent magnet disk of the permanent magnet coupling do not collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is satisfied;

[0028] If the axial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site axial vibration amplitude, or the radial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site radial vibration amplitude, or the vibration frequency of the permanent magnet connection is greater than or equal to the on-site vibration frequency, or the conductor disk and the permanent magnet disk of the permanent magnet coupling collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is not satisfied.

[0029] The implementation of the present invention has the following beneficial effects: the experimental bench device and the test method of the nuclear power plant drum-net motor transmission system can simulate the actual vibration working conditions of the on-site equipment. By setting a vibration loader to apply a vibration load to the drive mechanism or the output load, and setting a displacement and vibration measurement sensor to obtain vibration parameter information of the drive mechanism or the output load, the vibration improvement effect of the permanent magnet coupling when used on-site can be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0031] Figure 1 is a general structural diagram of an experimental bench device for a nuclear power plant drum-grid motor transmission system in some embodiments of the present invention;

[0032] Figure 2 It is a flow chart of a method for testing an experimental bench device of a drum-grid motor transmission system of a nuclear power plant in some embodiments of the present invention. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0034] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] See also Figure 1 , is a test bench device for a nuclear power plant drum-grid motor transmission system in some embodiments of the present invention, comprising a main rail 11, a first secondary rail 12, a second secondary rail 13, a drive mechanism 14, a connecting shaft 15, a vibration loader 16, a displacement and vibration measurement sensor 17, and an output load 18. The drive mechanism 14 and the output load 18 are both mounted on the main rail 11, and the drive mechanism 14 is connected to the output load 18 via the connecting shaft 15. The drive mechanism 14 comprises a drive motor, a flange coupling, a permanent magnet coupling, and a reducer, and the drive motor is connected to the reducer via a flange coupling or a permanent magnet coupling. The vibration loader 16 is mounted on the first secondary rail 12 and can move on the first secondary rail 12. The vibration loader 16 is used to apply a vibration load to the drive mechanism 14 or the output load 18. The displacement and vibration measurement sensor 17 is mounted on the second secondary rail 13 and can move on the second secondary rail 13. The displacement and vibration measurement sensor 17 is used to obtain vibration parameter information of the drive mechanism 14 or the output load 18.

[0036] The vibration loader 16 is a device attached to mechanical equipment to generate an excitation force and is a key component for utilizing mechanical vibration. The vibration loader 16 can cause the excited object to vibrate in a certain manner and magnitude, thereby conducting vibration and strength tests on the object. The vibration loader 16 can be a mechanical exciter, an electric exciter, or a hydraulic exciter. In this embodiment, the vibration loader 16 is used to apply a vibration load to the drive mechanism 14 or to the output load 18 to simulate the actual vibration conditions of the on-site equipment and to test the vibration improvement effect of the permanent magnet coupling in the field.

[0037] Preferably, the number of vibration loaders 16 is six, and the six vibration loaders 16 apply vibration loads to the drive mechanism 14 or the output load 18 from six directions, respectively. Alternatively, the vibration loads are applied to the drive mechanism 14 or the output load 18 through vector synthesis. Specifically, the six directions are up, down, left, right, front, and back directions, and six vibration loaders 16 are used to load the load from each of the six directions. The loading displacement and velocity in each direction are fitted and controlled by a computer. In other embodiments, the number of vibration loaders 16 is not limited to six, as long as the loads in the device can simulate the desired displacement / vibration curve over time.

[0038] The displacement and vibration measurement sensor 17 is an electronic device used to detect and analyze vibrations and oscillations in machinery, structures, and systems. It converts the mechanical vibrations and oscillations of the monitored equipment into proportional electrical signals to obtain vibration parameter information of the drive mechanism 14 or output load 18. The displacement and vibration measurement sensor 17 can be a contact measurement sensor, an infrared measurement sensor, or a laser measurement sensor.

[0039] In this embodiment, if Figure 2 As shown, a test method for an experimental bench device of a nuclear power plant drum-grid motor transmission system is also constructed, which is based on the above-mentioned experimental bench device of a nuclear power plant drum-grid motor transmission system and includes the following steps:

[0040] S1. Acquiring on-site vibration parameters of the driving mechanism 14 during on-site operation, wherein, during on-site operation, the driving motor is connected to the reducer via a flange coupling;

[0041] S2. Install the experimental bench device;

[0042] S3. Connect the drive motor and the reducer using a flange coupling, start the drive motor and the reducer, use the vibration loader 16 to load the on-site vibration parameters obtained in step S1 onto the drive mechanism 14, and simultaneously use the displacement and vibration measurement sensor 17 to obtain the rigid connection vibration parameters of the output load 18;

[0043] S4. Connect the drive motor and the reducer using a permanent magnet coupling, start the drive motor and the reducer, use a vibration loader 16 to load the rigid connection vibration parameters obtained in step S3 onto the output load 18, and simultaneously use a displacement and vibration measurement sensor 17 to obtain the permanent magnet connection vibration parameters of the drive mechanism 14, and monitor whether the conductor disk and the permanent magnet disk of the permanent magnet coupling collide;

[0044] S5. Compare the on-site vibration parameters obtained in step S1 and the permanent magnet connection vibration parameters obtained in step S4, and determine whether the optimization and upgrade are met when the permanent magnet coupling is used to connect the drive motor and the reducer based on whether the conductor disk and the permanent magnet disk of the permanent magnet coupling collide.

[0045] Wherein, step S2 includes:

[0046] Step S21: separately install the main guide rail 11, the first auxiliary guide rail 12, and the second auxiliary guide rail 13 on the fixed structure;

[0047] Step S22: Install the driving mechanism 14 and the output load 18 on the main rail 11, and connect the driving mechanism 14 and the output load 18 using the connecting shaft 15;

[0048] Step S23: Install the vibration loader 16 on the first secondary guide rail 12;

[0049] Step S24 : Install the displacement and vibration measurement sensor 17 on the second secondary guide rail 13 .

[0050] Specifically, the field vibration parameters include the field axial vibration amplitude, the field radial vibration amplitude, and the field vibration frequency. The rigid connection vibration parameters include the rigid connection axial vibration amplitude, the rigid connection radial vibration amplitude, and the rigid connection vibration frequency. The permanent magnet connection vibration parameters include the permanent magnet connection axial vibration amplitude, the permanent magnet connection radial vibration amplitude, and the permanent magnet connection vibration frequency.

[0051] In step S3, a vibration loader 16 applies the in-situ vibration parameters obtained in step S1 to the drive mechanism 14, such as an in-situ axial vibration amplitude of 3 mm, an in-situ radial vibration amplitude of 2 mm, and an in-situ vibration frequency of 10 Hz. A displacement and vibration measurement sensor 17 is used to obtain the rigid connection axial vibration amplitude, rigid connection radial vibration amplitude, and rigid connection vibration frequency of the output load 18.

[0052] In step S4, the rigid connection mode is switched to a permanent magnet connection mode. Specifically, a permanent magnet coupling is used to connect the drive motor and reducer. A vibration loader 16 is used to apply the rigid connection axial vibration amplitude, radial vibration amplitude, and vibration frequency obtained in step S3 to the output load 18. Simultaneously, a displacement and vibration measurement sensor 17 is used to obtain the permanent magnet connection axial vibration amplitude, radial vibration amplitude, and vibration frequency of the drive mechanism 14. The conductor disk and permanent magnet disk of the permanent magnet coupling are observed for collision.

[0053] In addition, in step S4, the displacement and vibration measurement sensor 17 may be used to test the usage range boundary of the permanent magnetic coupling, such as the displacement amplitude of the permanent magnetic coupling is 0-10 mm.

[0054] In step S5, if the axial vibration amplitude of the permanent magnet connection is less than the on-site axial vibration amplitude, the radial vibration amplitude of the permanent magnet connection is less than the on-site radial vibration amplitude, the vibration frequency of the permanent magnet connection is less than the on-site vibration frequency, and the conductor disk and the permanent magnet disk of the permanent magnet coupling do not collide, then it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is satisfied. If the axial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site axial vibration amplitude, or the radial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site radial vibration amplitude, or the vibration frequency of the permanent magnet connection is greater than or equal to the on-site vibration frequency, or the conductor disk and the permanent magnet disk of the permanent magnet coupling collide, then it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is not satisfied.

[0055] In a specific embodiment, the on-site axial vibration amplitude is 3mm, the on-site radial vibration amplitude is 2mm, and the on-site vibration frequency is 10Hz. If the axial vibration amplitude of the permanent magnet connection is less than 3mm, the radial vibration amplitude of the permanent magnet connection is less than 2mm, the vibration frequency of the permanent magnet connection is less than 10Hz, and the conductor disk and the permanent magnet disk of the permanent magnet coupling do not collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is met. If the axial vibration amplitude of the permanent magnet connection is greater than or equal to 3mm, or the vibration frequency of the permanent magnet connection is greater than or equal to 2mm, or the vibration frequency of the permanent magnet connection is greater than or equal to 10Hz, or the conductor disk and the permanent magnet disk of the permanent magnet coupling collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is not met.

[0056] It can be understood that the experimental bench device and test method of the nuclear power plant drum-grid motor transmission system can simulate the actual vibration conditions of the on-site equipment. By setting the vibration loader 16 to apply a vibration load to the drive mechanism 14 or the output load 18, and setting the displacement and vibration measurement sensor 17 to obtain the vibration parameter information of the drive mechanism 14 or the output load 18, the improvement effect of the permanent magnet coupling on vibration when used on site can be tested.

[0057] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A test bench device for a drum-net motor transmission system of a nuclear power plant, characterized in that: It comprises a main guide rail (11), a first auxiliary guide rail (12), a second auxiliary guide rail (13), a driving mechanism (14), a connecting shaft (15), a vibration loader (16), a displacement and vibration measurement sensor (17), and an output load (18); The driving mechanism (14) and the output load (18) are both mounted on the main rail (11), and the driving mechanism (14) is connected to the output load (18) via the connecting shaft (15); The driving mechanism (14) comprises a driving motor, a flange coupling, a permanent magnet coupling and a reducer, wherein the driving motor is connected to the reducer via the flange coupling or the permanent magnet coupling; The vibration loader (16) is mounted on the first secondary guide rail (12) and is movable on the first secondary guide rail (12), and the vibration loader (16) is used to apply a vibration load to the driving mechanism (14) or to the output load (18); The displacement and vibration measurement sensor (17) is mounted on the second secondary guide rail (13) and is movable on the second secondary guide rail (13). The displacement and vibration measurement sensor (17) is used to obtain vibration parameter information of the driving mechanism (14) or the output load (18).

2. The test bench device for the drum-net motor transmission system of a nuclear power plant according to claim 1, characterized in that: The vibration loader (16) is a mechanical vibrator, an electric vibrator or a hydraulic vibrator.

3. The test bench device for the drum-grid motor transmission system of a nuclear power plant according to claim 1, characterized in that: The number of the vibration loaders (16) is six, and the six vibration loaders (16) apply vibration loads to the driving mechanism (14) or the output load (18) from six directions respectively.

4. The test bench device for the drum-grid motor transmission system of a nuclear power plant according to claim 1, characterized in that: The displacement and vibration measuring sensor (17) is a contact measuring sensor, an infrared measuring sensor or a laser measuring sensor.

5. A method for testing a test bench device for a nuclear power plant drum-net motor transmission system, based on the test bench device for a nuclear power plant drum-net motor transmission system according to any one of claims 1 to 4, characterized in that: Including steps: S1, obtaining on-site vibration parameters of the driving mechanism (14) during on-site operation; S2, installing the experimental bench device; S3, connecting the drive motor and the reducer using a flange coupling, starting the drive motor and the reducer, using a vibration loader (16) to load the on-site vibration parameters obtained in step S1 on the drive mechanism (14), and simultaneously using a displacement and vibration measurement sensor (17) to obtain the rigid connection vibration parameters of the output load (18); S4, connecting the drive motor and the reducer using a permanent magnetic coupling, starting the drive motor and the reducer, using a vibration loader (16) to load the rigid connection vibration parameters obtained in step S3 on the output load (18), and simultaneously using a displacement and vibration measurement sensor (17) to obtain the permanent magnetic connection vibration parameters of the drive mechanism (14), and monitoring whether the conductor disk and the permanent magnetic disk of the permanent magnetic coupling collide; S5. Compare the on-site vibration parameters obtained in step S1 and the permanent magnet connection vibration parameters obtained in step S4, and determine whether optimization and upgrading are satisfied when the drive motor and the reducer are connected using the permanent magnet coupling based on whether the conductor disk and the permanent magnet disk of the permanent magnet coupling collide.

6. The test method of the experimental bench device of the nuclear power plant drum-grid motor transmission system according to claim 5, characterized in that: Step S2 includes: Step S21, separately installing the main guide rail (11), the first auxiliary guide rail (12), and the second auxiliary guide rail (13) on the fixed structure; Step S22: Install the driving mechanism (14) and the output load (18) on the main rail (11), and connect the driving mechanism (14) and the output load (18) using a connecting shaft (15); Step S23, installing the vibration loader (16) on the first secondary guide rail (12); Step S24: Install the displacement and vibration measurement sensor (17) on the second secondary guide rail (13).

7. The test method of the test bench device of the drum-grid motor transmission system of a nuclear power plant according to claim 5, characterized in that: The on-site vibration parameters include on-site axial vibration amplitude, on-site radial vibration amplitude and on-site vibration frequency.

8. The method for testing the experimental bench device of the drum-grid motor transmission system of a nuclear power plant according to claim 5, characterized in that: The rigid connection vibration parameters include the rigid connection axial vibration amplitude, the rigid connection radial vibration amplitude, and the rigid connection vibration frequency.

9. The test method of the experimental bench device of the drum-grid motor transmission system of a nuclear power plant according to claim 7, characterized in that: The permanent magnet connection vibration parameters include the permanent magnet connection axial vibration amplitude, the permanent magnet connection radial vibration amplitude and the permanent magnet connection vibration frequency.

10. The test method of the test bench device of the drum-grid motor transmission system of a nuclear power plant according to claim 9, characterized in that: In step S5, if the axial vibration amplitude of the permanent magnet connection is smaller than the on-site axial vibration amplitude, the radial vibration amplitude of the permanent magnet connection is smaller than the on-site radial vibration amplitude, the vibration frequency of the permanent magnet connection is smaller than the on-site vibration frequency, and the conductor disk and the permanent magnet disk of the permanent magnet coupling do not collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization and upgrade conditions are met; If the axial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site axial vibration amplitude, or the radial vibration amplitude of the permanent magnet connection is greater than or equal to the on-site radial vibration amplitude, or the vibration frequency of the permanent magnet connection is greater than or equal to the on-site vibration frequency, or the conductor disk and the permanent magnet disk of the permanent magnet coupling collide, it means that when the permanent magnet coupling is used to connect the drive motor and the reducer, the optimization upgrade is not satisfied.

Images