Intelligent damping support for main pump of nuclear power plant and control method of intelligent damping support

Abstract

The invention provides an intelligent vibration reduction support for a main pump of a nuclear power plant and a control method of the intelligent vibration reduction support. The intelligent vibration reduction support comprises a coil winding type iron core, a permanent magnet, a magnetic conductive component, an elastic support, a data acquisition and processing module and a control driving module. One end of the coil winding type iron core is connected with the permanent magnet, and the other end of the coil winding type iron core is connected to the main pump; the magnetic conductive component is fixed on a wall body and is arranged opposite to the permanent magnet; one end of the elastic support is connected to the main pump, and the other end of the elastic support is connected to a wall body; the data acquisition and processing module is connected to the main pump and is used for measuring a vibration signal at the tail end of a cantilever of the main pump and processing the vibration signal; and the control driving module is connected to the coil winding type iron core and the data acquisition and processing module, and is used for receiving a control signal sent by the data acquisition and processing module and controlling the on-off of a circuit of the coil winding type iron core according to the control signal. Intelligent design of the damping support of the main pump of the nuclear power plant is realized, and a scheme for rapidly changing the support rigidity of the nuclear power plant is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction of a main pump of a nuclear power plant, and in particular to an intelligent vibration reduction support for a main pump of a nuclear power plant and a control method thereof. Background Art

[0002] The reactor coolant pump (also known as the main pump) is a crucial component within the primary circuit pressure boundary of a nuclear power plant. Located beneath the steam generators in the nuclear island building, it is the sole rotating mechanical component in the primary circuit of a nuclear power plant. Its operational performance directly impacts the plant's safe and stable operation. The main pump in a third-generation passive nuclear power plant is a suspended pump with its inlet connected to the steam generator and its outlet to the cold section, forming a vertical cantilever beam structure.

[0003] When the main pump is running, the high-temperature, high-pressure fluid excitation load at its outlet acts on the root area of ​​the pump, causing the pump to generate low-frequency vibration and the horizontal vibration amplitude at the bottom free end is the largest. When the fluid excitation frequency is coupled with the natural frequency of the main pump, a resonance effect will be generated. There is a risk of resonance coupling amplification, which affects the normal operation of nuclear power. Effective measures need to be taken to reduce the vibration of the main pump.

[0004] There are two main methods to reduce the vibration of the main pump: one is to change the external excitation load of the main pump, which can be achieved by adjusting the main pump speed, etc., but this method is only effective for some operating conditions of the nuclear power plant; the other is to change the natural frequency of the main pump. However, due to the limitations of the already arranged and solidified nuclear island plant and installed and solidified pump components, and the thermal expansion displacement of the main coolant circuit due to heating and cooling, it is currently difficult to change the natural frequency of the main pump through conventional external intervention vibration reduction measures.

[0005] In view of this, the inventors of the present application have designed an intelligent vibration reduction support for a main pump of a nuclear power plant and a control method thereof, in order to overcome the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the main pump vibration reduction scheme in the prior art, such as limited working conditions and unadjustable natural frequency, and to provide an intelligent vibration reduction support for the main pump of a nuclear power plant and a control method thereof.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides an intelligent vibration-damping support for the main pump of a nuclear power plant, which is characterized in that the intelligent vibration-damping support for the main pump of a nuclear power plant includes a coil-wound iron core, a permanent magnet, a magnetic conductive component, an elastic support, a data acquisition and processing module, and a control and drive module; one end of the coil-wound iron core is connected to the permanent magnet, and the other end of the coil-wound iron core is connected to the main pump; the magnetic conductive component is fixed to a wall and arranged opposite to the permanent magnet; one end of the elastic support is connected to the main pump, and the other end of the elastic support is connected to the wall; the data acquisition and processing module is connected to the main pump, and is used to measure the vibration signal of the cantilever end of the main pump and process the vibration signal; the control and drive module is connected to the coil-wound iron core and the data acquisition and processing module, and is used to receive a control signal sent by the data acquisition and processing module, and control the circuit on and off of the coil-wound iron core according to the control signal.

[0009] According to one or more preferred embodiments of the present invention, the data acquisition and processing module includes a vibration sensor, a vibration signal transmission channel and a data acquisition and processing device; the vibration sensor is connected to the main pump, and the vibration sensor is electrically connected to the input end of the data acquisition and processing device through the vibration signal transmission channel.

[0010] According to one or more preferred embodiments of the present invention, the control drive module includes a data transmission channel, a control device and a control circuit; the output end of the control device is electrically connected to the coil-wound iron core through the control circuit, and the input end of the control device is electrically connected to the output end of the data acquisition and processing device through the data transmission channel.

[0011] According to one or more preferred embodiments of the present invention, the intelligent vibration reduction support for the main pump of a nuclear power plant further includes an electromagnetic shielding block, and the other end of the coil-wound iron core is connected to the main pump via the electromagnetic shielding block.

[0012] According to one or more preferred embodiments of the present invention, the intelligent vibration-damping support for the main pump of a nuclear power plant also includes an electromagnetic shielding cover, one end of which is fixed to the wall and wraps the magnetic conductive component, and the other end of the electromagnetic shielding cover is open, and the coil-wound iron core and the permanent magnet extend into the electromagnetic shielding cover from the opening of the electromagnetic shielding cover.

[0013] According to one or more preferred embodiments of the present invention, the intelligent vibration reduction support for the main pump of a nuclear power plant also includes a thermal insulation pad support seat, which is fixedly arranged on the main pump, and the electromagnetic shielding block is connected to the main pump through the thermal insulation pad support seat.

[0014] According to one or more preferred embodiments of the present invention, one end of the elastic support is connected to the main pump through the thermal insulation pad support seat, and the other end of the elastic support is provided with a support seat, and the other end of the elastic support is connected to the wall through the support seat.

[0015] According to one or more preferred embodiments of the present invention, the magnetic conductive component is made of magnetic conductive stainless steel.

[0016] According to one or more preferred embodiments of the present invention, the elastic support is a spring support.

[0017] The present invention also provides a main pump vibration reduction support control method, which is characterized in that the main pump vibration reduction support control method is used to control the intelligent vibration reduction support of the main pump of a nuclear power plant as described above, and the control method includes the following steps: S1, the vibration sensor obtains real-time vibration data of the main pump; S2, the data acquisition and processing equipment processes the vibration data and transmits the signal to the control equipment; S3, the control equipment determines whether the vibration level of the main pump meets the following conditions: the vibration level shows an amplification trend and approaches the vibration limit; S4, when the vibration level meets the conditions, the control equipment starts power transmission, the permanent magnet generates a strong magnetic field and is tightly adsorbed with the magnetic conductive component to form a rigid connection state, thereby changing the natural frequency of the main pump and suppressing vibration; when the vibration level does not meet the conditions, the control equipment remains in a power-off state.

[0018] The positive progress effect of the present invention is:

[0019] The intelligent vibration reduction support for the main pump of a nuclear power plant of the present invention has at least the following advantages:

[0020] 1. The present invention can release the thermal expansion displacement caused by the temperature increase or decrease of the main coolant circuit during normal temperature increase or decrease in the power plant, without affecting the original stress of the main coolant system, the normal operation of the main pump, or the layout space of the solidified nuclear power plant.

[0021] Second, the intelligent vibration reduction support is realized through real-time monitoring and data processing of vibration data and the establishment of an automatic control system; at the same time, the complete process time from the occurrence of vibration to the action of the vibration reduction support is reduced to the order of milliseconds through the use of electromagnetic constraints. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which like reference numerals represent like features throughout, wherein:

[0023] Figure 1 It is a structural schematic diagram of an embodiment of an intelligent vibration reduction support for a main pump of a nuclear power plant according to the present invention.

[0024] Figure 2It is a flow chart of an embodiment of a main pump vibration reduction support control method of the present invention.

[0025] Figure 3 It is a schematic diagram of the vibration reduction effect of an embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention.

[0026] Reference numerals

[0027] Coil wound core 100

[0028] Electromagnetic shielding block 110

[0029] Permanent magnet 200

[0030] Magnetic conductive component 300

[0031] Electromagnetic shielding sleeve 310

[0032] Elastic support 400

[0033] Support bracket 410

[0034] Data acquisition and processing module 500

[0035] Vibration sensor 510

[0036] Vibration signal transmission channel 520

[0037] Data acquisition and processing equipment 530

[0038] Control drive module 600

[0039] Data transmission channel 610

[0040] Control device 620

[0041] Control circuit 630

[0042] Main pump 700

[0043] Thermal insulation pad support seat 710

[0044] Wall 800 DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts. Furthermore, while the terminology used in the present invention is selected from commonly known and commonly used terms, some of the terms mentioned in this specification may have been selected at the applicant's discretion, with their detailed meanings explained in the relevant sections of the description herein. Furthermore, it is required that the present invention be understood not only by the actual terms used, but also by the meaning implied by each term. Also, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to scale.

[0047] Reference Figure 1 The present invention provides an intelligent vibration reduction support for a main pump of a nuclear power plant, which includes a coil-wound iron core 100, a permanent magnet 200, a magnetic conductive component 300, an elastic support 400, a data acquisition and processing module 500, and a control and drive module 600.

[0048] One end of the coil-wound core 100 is connected to the permanent magnet 200 , and the other end of the coil-wound core 100 is connected to the main pump 700 ;

[0049] The magnetic conductive component 300 is fixed to the wall 800 and arranged opposite to the permanent magnet 200;

[0050] One end of the elastic support 400 is connected to the main pump 700, and the other end of the elastic support 400 is connected to the wall 800;

[0051] The data acquisition and processing module 500 is connected to the main pump 700 and is used to measure the vibration signal of the cantilever end of the main pump 700 and process the vibration signal;

[0052] The control driving module 600 is connected to the coil-wound core 100 and the data acquisition and processing module 500 , and is used to receive a control signal from the data acquisition and processing module 500 and control the on / off of the circuit of the coil-wound core 100 according to the control signal.

[0053] The present invention provides an embodiment of the intelligent vibration reduction support module components and their connection styles for the main pump of a nuclear power plant. Figure 1 shown.

[0054] It should be noted that the coil-wound iron core 100, permanent magnet 200, magnetic conductive component 300 and elastic support 400 constitute the mechanical action module of the intelligent vibration reduction support of the nuclear power plant main pump of the present invention. The variable support stiffness is achieved through the cooperation of the mechanical action module with the data acquisition and processing module 500 and the control drive module 600.

[0055] The intelligent vibration-damping support for the main pump of a nuclear power plant of the present invention solves the problem that, due to the thermal expansion of the primary circuit itself or the limitation of the layout space, it is difficult to change the structural frequency by adding permanent rigid supports to the main coolant system pipeline and the main pump 700 to reduce the excessive horizontal vibration of the main pump 700.

[0056] Reference Figure 1 As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention, the data acquisition and processing module 500 includes a vibration sensor 510, a vibration signal transmission channel 520, and a data acquisition and processing device 530; the vibration sensor 510 is connected to the main pump 700, and the vibration sensor 510 is electrically connected to the input end of the data acquisition and processing device 530 through the vibration signal transmission channel 520.

[0057] Preferably, the vibration signal at the cantilever end of the main pump 700 can be measured by the vibration sensor 510, and the vibration velocity time series and spectrum can be obtained after entering the data acquisition and processing equipment 530 through the vibration signal transmission channel 520 for processing, thereby obtaining the vibration peak frequency and vibration level of the cantilever end of the main pump 700.

[0058] Reference Figure 1 As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention, the control drive module 600 includes a data transmission channel 610, a control device 620 and a control circuit 630; the output end of the control device 620 is electrically connected to the coil-wound iron core 100 through the control circuit 630, and the input end of the control device 620 is electrically connected to the output end of the data acquisition and processing device 530 through the data transmission channel 610.

[0059] Preferably, the processed vibration data enters the control device 620 via the data transmission channel 610 and is connected to the coil-wound iron core 100 through the control circuit 630 .

[0060] Reference Figure 1 As a preferred embodiment of the intelligent vibration-damping support for the main pump of a nuclear power plant of the present invention, the intelligent vibration-damping support for the main pump of a nuclear power plant also includes an electromagnetic shielding block 110, and the other end of the coil-wound iron core 100 is connected to the main pump 700 through the electromagnetic shielding block 110.

[0061] It should be noted that the electromagnetic shielding block 110 blocks the interference of the external electromagnetic field on the coil-wound iron core 100 through its low magnetic permeability or electrical resistance material, ensuring the accuracy of vibration signal acquisition and control, while preventing the magnetic field generated by the iron core from leaking and affecting the main pump 700 or other sensitive equipment; in addition, the electromagnetic shielding block 110 also serves as a connecting component.

[0062] Reference Figure 1As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant of the present invention, the intelligent vibration reduction support for the main pump of a nuclear power plant further includes an electromagnetic shielding sleeve 310, one end of the electromagnetic shielding sleeve 310 is fixed to the wall 800 and wraps the magnetic conductive component 300, the other end of the electromagnetic shielding sleeve 310 is open, and the coil-wound iron core 100 and the permanent magnet 200 extend into the electromagnetic shielding sleeve 310 from the opening of the electromagnetic shielding sleeve 310.

[0063] That is, the electromagnetic shielding sleeve 310 is fixed to the wall 800 to wrap the magnetic conductive component 300 , the permanent magnet 200 and the coil-wound iron core 100 .

[0064] It should be noted that the electromagnetic shielding cover 310 can be used to provide a closed electromagnetic isolation environment. By wrapping the magnetic conductive component 300 and accommodating the coil-wound iron core 100 and the permanent magnet 200, it can effectively suppress magnetic field leakage and external electromagnetic interference, and ensure that the magnetic field range of the main pump vibration reduction support system is controllable; at the same time, its open design allows the coil-wound iron core 100 and the permanent magnet 200 to move flexibly.

[0065] Preferably, a certain gap is maintained between the magnetic stainless steel and the permanent magnet 200, and a certain gap is also maintained between the end of the electromagnetic shielding sleeve 310 and the electromagnetic shielding block 110. The two gaps are consistent, ensuring that only the spring support works when the main coolant circuit is normally heated and cooled, thereby maximizing the release of thermal expansion displacement.

[0066] Reference Figure 1 As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant of the present invention, the intelligent vibration reduction support for the main pump of a nuclear power plant also includes a thermal insulation pad support seat 710, which is fixedly arranged on the main pump 700, and the electromagnetic shielding block 110 is connected to the main pump 700 through the thermal insulation pad support seat 710.

[0067] Reference Figure 1 As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant of the present invention, one end of the elastic support 400 is connected to the main pump 700 through a thermal insulation pad support seat 710, and the other end of the elastic support 400 is provided with a support seat 410, and the other end of the elastic support 400 is connected to the wall 800 through the support seat 410.

[0068] It should be noted that the thermal insulation pad support seat 710 can be used to block the heat conduction during the operation of the main pump 700. The thermal insulation pad support seat 710 can use thermal insulation materials (such as ceramics or high-temperature resistant composite materials) to reduce the heat transfer from the high-temperature components of the main pump 700 to the electromagnetic shielding block 110 and the mechanical action module of the intelligent vibration reduction support of the nuclear power plant main pump, thereby protecting the electromagnetic components (such as the coil-wound iron core 100) from the influence of high temperature, ensuring its magnetic properties and control stability; at the same time, the thermal insulation pad support seat 710 also serves as the connection base between the main pump 700 and the electromagnetic shielding block 110 and the elastic support 400 to ensure the stability of the vibration transmission path.

[0069] As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention, the magnetic conductive component 300 is made of magnetic conductive stainless steel.

[0070] As a preferred embodiment of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention, the elastic support 400 is a spring support.

[0071] Figure 3 The figure shows the vibration reduction effect of the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention. In one embodiment, the vibration waveform of the main pump 700 before the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention is not installed is shown as the solid line in the figure, and the vibration waveform of the main pump 700 after the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention is installed is shown as the dotted line in the figure. It can be seen that the intelligent vibration reduction support for the main pump of a nuclear power plant according to the present invention has a good vibration reduction effect.

[0072] As described above, the intelligent vibration-damping support for the main pump of a nuclear power plant according to the present invention can, while barely affecting the existing stresses of the primary coolant system, adjust the natural frequency of the main pump 700 in real time based on vibration monitoring at different speeds and during transient speed increases, avoiding the excitation frequencies within the pipeline loop. This reduces the vibration level of the main pump 700 and effectively addresses the problem of excessive vibration levels of the main pump 700 caused by the excitation loads of the flow field within the primary loop. The technical solution of the intelligent vibration-damping support for the main pump of a nuclear power plant according to the present invention does not alter the operating state of the nuclear power plant's primary loop, does not affect the normal operation of the pump, and does not affect the existing layout space of the nuclear power plant. It offers low construction difficulty, short construction time, and significant vibration reduction effects.

[0073] Reference Figure 2 The present invention also provides a main pump vibration reduction support control method, which is used to control the above-mentioned intelligent vibration reduction support for the main pump of a nuclear power plant. The control method includes the following steps:

[0074] Step S1: The vibration sensor 510 obtains real-time vibration data of the main pump 700;

[0075] Step S2: The data acquisition and processing device 530 processes the vibration data and transmits a signal to the control device 620;

[0076] Step S3: The control device 620 determines whether the vibration level of the main pump 700 satisfies the following conditions: the vibration level shows an amplifying trend and approaches the vibration limit;

[0077] Step S4: When the vibration level meets the conditions, the control device 620 starts power transmission, the permanent magnet 200 generates a strong magnetic field and is tightly adsorbed with the magnetic conductive component 300, forming a rigid connection state, changing the natural frequency of the main pump 700 and suppressing vibration; when the vibration level does not meet the conditions, the control device 620 remains in the power-off state.

[0078] The process of one embodiment of the main pump vibration reduction support control method of the present invention is shown as follows: Figure 2 shown.

[0079] The main pump vibration reduction support control method of the present invention, combined with the structural design of the intelligent vibration reduction support for the main pump of a nuclear power plant of the present invention, achieves the following technical effects:

[0080] 1. When the vibration level shows an amplifying trend and approaches the vibration limit, the control device 620 automatically recognizes the signal from the data acquisition and processing device 530, turns on the power transmission switch, and enters the control logic of step 4. The support becomes a rigid support, which can change the natural frequency of the main pump 700 and suppress vibration.

[0081] 2. When the vibration level is significantly reduced and stabilized, the control device 620 automatically recognizes the signal from the data acquisition and processing device 530, stops power transmission, and enters the control logic of step five. At this time, the support returns to the initial flexible support, and the normal temperature rise and fall of the main coolant system will not affect the thermal expansion of the main pump 700.

[0082] 3. By connecting an external control circuit to the control device 620, human intervention can be achieved and human control can be performed when needed.

[0083] In one embodiment, the coordination of the various components of the intelligent vibration reduction support for the main pump of a nuclear power plant and the operation of the main pump vibration reduction support control method of the present invention are as follows:

[0084] (1) The vibration signal of the cantilever end of the main pump 700 is measured by the vibration sensor 510, and the vibration signal enters the data acquisition and processing equipment 530 through the vibration signal transmission channel 520 for processing to obtain the velocity time history and spectrum of the vibration, and the vibration peak frequency and vibration level of the cantilever end of the main pump 700 are obtained.

[0085] (2) The processed vibration data enters the control device 620 via the data transmission channel 610 and is connected to the coil-wound iron core 100 through the control circuit 630.

[0086] (3) The control circuit 630 is connected to the coil-wound iron core 100, and a permanent magnet 200 is embedded in one end of the coil-wound iron core 100 and arranged opposite to the magnetic stainless steel fixed to the wall 800; the other end of the coil-wound iron core 100 is connected to the electromagnetic shielding block 110 and is connected to the main pump 700 through the thermal insulation pad support seat 710; an electromagnetic shielding cover 310 is set and fixed to the wall 800 to wrap the magnetic stainless steel, permanent magnet 200 and the coil-wound iron core 100; two low-rigidity spring supports are symmetrically arranged on the outside of the electromagnetic shielding cover 310, one end of which is connected to the main pump 700 through the thermal insulation pad support seat 710, and the other end is fixed to the wall 800 through the support bracket 410.

[0087] (4) The control device 620 transmits current to the coil-wound core 100 through the control circuit 630, so that the permanent magnet 200 generates a strong magnetic field, closing the gap until it is tightly adsorbed with the magnetic stainless steel, forming a rigid connection state.

[0088] (5) After the control device 620 sends a power-off signal, only the permanent magnet 200 will retain the weak magnetic field effect for a short time (0-200ms). The permanent magnet 200 and the coil-wound iron core 100 are pulled away from the magnetic stainless steel through two spring supports, and the main pump 700 returns to a free thermal expansion state.

[0089] The intelligent vibration reduction support for the main pump of a nuclear power plant and the control method thereof of the present invention realize the intelligent design of the vibration reduction support for the main pump of a nuclear power plant through a sensor-data acquisition and processing-automatic control system, and provide a solution for rapidly changing the support stiffness of the nuclear power plant through magnetic constraint.

[0090] In summary, the intelligent vibration reduction support and control method for the main pump of a nuclear power plant of the present invention have the following advantages:

[0091] 1. The present invention can release the thermal expansion displacement caused by the temperature increase or decrease of the main coolant circuit during normal temperature increase or decrease in the power plant, without affecting the original stress of the main coolant system, the normal operation of the main pump 700, or the layout space of the solidified nuclear power plant.

[0092] Second, the intelligent vibration reduction support is realized through real-time monitoring and data processing of vibration data and the establishment of an automatic control system; at the same time, the complete process time from the occurrence of vibration to the action of the vibration reduction support is reduced to the order of milliseconds through the use of electromagnetic constraints.

[0093] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. An intelligent vibration reduction support for the main pump of a nuclear power plant, characterized in that: The intelligent vibration reduction support for the main pump of a nuclear power plant comprises a coil-wound iron core, a permanent magnet, a magnetic conductive component, an elastic support, a data acquisition and processing module, and a control and drive module; One end of the coil-wound iron core is connected to the permanent magnet, and the other end of the coil-wound iron core is connected to the main pump; The magnetic conductive component is fixed to the wall and arranged opposite to the permanent magnet; One end of the elastic support is connected to the main pump, and the other end of the elastic support is connected to the wall; The data acquisition and processing module is connected to the main pump and is used to measure the vibration signal of the cantilever end of the main pump and process the vibration signal; The control drive module is connected to the coil-wound iron core and the data acquisition and processing module, and is used to receive a control signal from the data acquisition and processing module, and control the on and off of the circuit of the coil-wound iron core according to the control signal.

2. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The data acquisition and processing module includes a vibration sensor, a vibration signal transmission channel and a data acquisition and processing device; the vibration sensor is connected to the main pump, and the vibration sensor is electrically connected to the input end of the data acquisition and processing device through the vibration signal transmission channel.

3. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The control drive module includes a data transmission channel, a control device and a control circuit; the output end of the control device is electrically connected to the coil-wound iron core through the control circuit, and the input end of the control device is electrically connected to the output end of the data acquisition and processing device through the data transmission channel.

4. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The intelligent vibration reduction support for the main pump of a nuclear power plant further includes an electromagnetic shielding block, and the other end of the coil-wound iron core is connected to the main pump via the electromagnetic shielding block.

5. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The intelligent vibration-damping support for the main pump of a nuclear power plant also includes an electromagnetic shielding sleeve, one end of which is fixed to the wall and wraps the magnetic conductive component, and the other end of the electromagnetic shielding sleeve is open, and the coil-wound iron core and the permanent magnet extend into the electromagnetic shielding sleeve from the opening of the electromagnetic shielding sleeve.

6. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 4, characterized in that: The intelligent vibration reduction support for the main pump of a nuclear power plant further comprises a thermal insulation pad support seat, which is fixedly arranged on the main pump, and the electromagnetic shielding block is connected to the main pump via the thermal insulation pad support seat.

7. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 6, characterized in that: One end of the elastic support is connected to the main pump through the thermal insulation pad support seat, and the other end of the elastic support is provided with a support seat, and the other end of the elastic support is connected to the wall through the support seat.

8. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The magnetic conductive component is made of magnetic conductive stainless steel.

9. The intelligent vibration reduction support for the main pump of a nuclear power plant according to claim 1, characterized in that: The elastic support is a spring support.

10. A main pump vibration reduction support control method, characterized in that: The main pump vibration reduction support control method is used to control the intelligent vibration reduction support for the main pump of a nuclear power plant according to any one of claims 1 to 9, and the control method comprises the following steps: S1, the vibration sensor obtains the real-time vibration data of the main pump; S2, the data acquisition and processing equipment processes the vibration data and transmits the signal to the control equipment; S3. The control device determines whether the vibration level of the main pump meets the following requirements: the vibration level shows an amplifying trend and approaches the vibration limit; S4. When the vibration level meets the conditions, the control device starts power transmission, the permanent magnet generates a strong magnetic field and tightly adsorbs the magnetic conductive component to form a rigid connection state, changing the natural frequency of the main pump and suppressing vibration; when the vibration level does not meet the conditions, the control device remains in the power-off state.

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