Drum and net drive system based on permanent magnet non-contact transmission

Abstract

The utility model discloses a kind of drum net driving systems based on permanent-magnetic non-contact transmission, it includes drive motor, speed reducer, permanent-magnetic coupling transmission module, adjusting assembly and vibration monitoring module.The drum net driving system is by setting permanent-magnetic disk and conductor disk, drive motor drives conductor disk rotation, permanent-magnetic disk generates torque by air gap magnetic field induction, realize the torque transmission of no mechanical connection, and simultaneously realize vibration isolation, because air gap blocks vibration transmission path, drive motor side vibration amplitude attenuation is greatly reduced, and speed reducer input shaft only bears pure torque.In addition, air gap can be adjusted by adjusting assembly, the drive motor of malfunction can be removed, realize clutch function, then spare drive motor is pushed into meshing, online repair can be realized, maintenance or adjustment can be carried out without shutdown, improve production efficiency.It is also by setting vibration monitoring module that the operation of permanent-magnetic transmission device can be physically protected, simultaneously as the platform of laser monitoring and display system.

Description

Technical Field

[0001] This utility model relates to the field of drive technology for circulating water filtration systems in nuclear power plants, and in particular to a drum mesh drive system based on permanent magnet non-contact transmission. Background Technology

[0002] Existing CFI (Continuous Fusion Filter) systems in nuclear power plants generally employ a mechanical transmission structure using worm gear reducers and flexible couplings. The core issues include:

[0003] (1) Vibration transmission and amplification: The motor and reducer are rigidly connected by flanges. The cantilever structure causes vibration to be amplified at the bearing, leading to problems such as bearing breakage and bolt breakage (especially in medium and high speed mode).

[0004] (2) Mechanical wear and maintenance difficulties: The flexible coupling cannot isolate vibrations of different frequencies, resulting in the input shaft of the reducer being subjected to additional impact force, requiring frequent shutdowns for maintenance.

[0005] (3) Space limitations and insufficient reliability: Due to the limited radial space, it is difficult to install traditional clutch devices on the motor, and the existing structure cannot meet the long-term stable operation requirements under harsh environments (humidity, salt spray, high temperature).

[0006] (4) Lack of monitoring methods: Existing technologies lack real-time monitoring capabilities for the vibration and displacement of permanent magnet drive devices, making it difficult to predict equipment failures. Delayed fault warnings may lead to unplanned downtime. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a drum mesh drive system based on permanent magnet non-contact transmission.

[0008] The technical solution adopted by this utility model to solve its technical problem is: to construct a drum mesh drive system based on permanent magnet non-contact transmission, which includes a drive motor, a reducer, a permanent magnet coupling transmission module, an adjustment component and a vibration monitoring module;

[0009] The permanent magnet coupling transmission module includes a permanent magnet disk and a conductor disk. The permanent magnet disk is connected to the input shaft of the reducer, and the conductor disk is connected to the actuating shaft of the drive motor. An air gap is formed between the permanent magnet disk and the conductor disk. The adjustment component is connected to the drive motor and is used to adjust the air gap.

[0010] The vibration monitoring module includes a protective sleeve, a laser measuring device, and a digital display device. The protective sleeve is disposed on the outside of the permanent magnet disk and the conductor disk. The laser measuring device is mounted on the protective sleeve and is used to measure the vibration value and displacement of the permanent magnet disk. The digital display device is mounted on the protective sleeve and is communicatively connected to the laser measuring device.

[0011] In some embodiments, the adjustment assembly includes a support frame, a slide connected to the support frame, a slider movably connected to the slide, a transmission rod mounted on the slide and pulsatorically connected to the slider, and a handwheel connected to the transmission rod, wherein the drive motor is mounted on the slider.

[0012] In some embodiments, the laser measuring device includes a first laser sensor, a second laser sensor, and a third laser sensor. The first laser sensor is used to measure the vibration value of the permanent magnet disk, the second laser sensor is used to measure the axial displacement value of the permanent magnet disk, and the third laser sensor is used to measure the radial offset value of the permanent magnet disk.

[0013] In some embodiments, the protective sleeve is an inverted U-shaped sealing protective sleeve.

[0014] In some embodiments, the protective sleeve is provided with an observation hole.

[0015] In some embodiments, the thickness of the protective sleeve is 1 mm to 5 mm.

[0016] In some embodiments, the protective case is made of stainless steel.

[0017] In some embodiments, the digital display device includes a display screen, which is connected to the laser measuring device via a data cable.

[0018] In some embodiments, the permanent magnet disk is a neodymium iron boron magnetic ring.

[0019] In some embodiments, the conductor disk is a copper alloy conductor disk.

[0020] The present invention offers the following advantages: The drum-mesh drive system incorporates a permanent magnet disk and a conductor disk. A drive motor rotates the conductor disk, and the permanent magnet disk generates torque through the air gap magnetic field, achieving torque transmission without mechanical connection and simultaneously isolating vibration. Because the air gap blocks the vibration transmission path, the vibration amplitude attenuation on the drive motor side is significantly reduced, and the reducer input shaft only bears pure torque. Furthermore, the air gap can be adjusted via an adjustment component, allowing the disengaged drive motor to function as a clutch. A spare drive motor can then be engaged, enabling online maintenance without downtime, thus improving production efficiency. The drum-mesh drive system also integrates mechanical protection and optical monitoring functions through a vibration monitoring module. This provides physical protection for the permanent magnet drive device and serves as a platform for laser monitoring and display systems. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0022] Figure 1 This is an overall structural diagram of the drum mesh drive system based on permanent magnet non-contact transmission in some embodiments of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the drum mesh drive system based on permanent magnet non-contact transmission after the protective cover is hidden in some embodiments of this utility model. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Please see Figure 1 and Figure 2This invention relates to a drum mesh drive system based on permanent magnet non-contact transmission in some embodiments, comprising a drive motor 1, a reducer 2, a permanent magnet coupling transmission module 3, an adjustment component 4, and a vibration monitoring module 5. The permanent magnet coupling transmission module 3 includes a permanent magnet disk 31 and a conductor disk 32. The permanent magnet disk 31 is connected to the input shaft of the reducer 2, and the conductor disk 32 is connected to the actuating shaft of the drive motor 1. An air gap is formed between the permanent magnet disk 31 and the conductor disk 32. The adjustment component 4 is connected to the drive motor 1 and used to adjust the air gap. The vibration monitoring module 5 includes a protective sleeve 51, a laser measuring device 52, and a digital display device 53. The protective sleeve 51 is disposed outside the permanent magnet disk 31 and the conductor disk 32. The laser measuring device 52 is mounted on the protective sleeve 51 and used to measure the vibration value and displacement of the permanent magnet disk 31. The digital display device 53 is mounted on the protective sleeve 51 and is communicatively connected to the laser measuring device 52. A load shaft is connected to the reducer 2 and connected to the drum mesh, thereby enabling the drum mesh drive system to drive the drum mesh to move.

[0027] The minimum air gap between the permanent magnet disk 31 and the conductor disk 32 is 5mm. Torque is transmitted between the permanent magnet disk 31 and the conductor disk 32 through eddy current induction. Preferably, the permanent magnet disk 31 is a neodymium iron boron magnetic ring, which has a high magnetic energy product, far exceeding that of traditional ferrite magnets, and can generate a stronger magnetic field in the same volume. The diameter of the permanent magnet disk 31 is matched according to the power of the drive motor 1. For example, if matched with the drive motor 1, the diameter of the permanent magnet disk 31 is 400mm. The conductor disk 32 is a copper alloy conductor disk. The advantages of copper alloy conductor disks are mainly reflected in high conductivity, high strength, easy processing, and corrosion resistance.

[0028] Specifically, traditional drive systems suffer from numerous problems during the operation of drum and mesh drive systems. Firstly, the mechanical connection between the motor and reducer for torque transmission makes it easy for motor vibrations to be transmitted to the reducer, affecting its lifespan and operational stability. Furthermore, the vibration transmission path is difficult to block, resulting in poor vibration attenuation. Secondly, real-time online monitoring of the vibration state and displacement of transmission components is difficult, hindering timely detection of operational anomalies and increasing the risk of malfunctions. Additionally, in space-constrained environments, traditional clutch devices are inconvenient to operate, making rapid clutch engagement difficult. Moreover, equipment failures necessitate shutdown for maintenance, severely impacting production efficiency. Moreover, traditional protection devices are functionally limited, providing only basic mechanical protection and failing to meet the needs of monitoring equipment operating status.

[0029] Therefore, in this embodiment, the drum mesh drive system adopts permanent magnet non-contact transmission. During transmission, there is no physical contact, and there is no friction, meshing, or impact wear. This avoids component failures caused by gear meshing and coupling wear in traditional transmissions, reducing the replacement frequency of vulnerable parts such as gears, belts, and bearings, and extending equipment maintenance cycles by 3-5 times. Furthermore, non-contact magnetic field coupling has "flexible transmission" characteristics, isolating vibration transmission between the driving and driven ends. High-frequency vibrations during motor operation will not be transmitted to the load through rigid connections, and conversely, impacts on the load side will not react on the motor.

[0030] In some embodiments, the adjustment assembly 4 includes a support frame 41, a slide 42 connected to the support frame 41, a slider 43 movably connected to the slide 42, a transmission rod 44 mounted on the slide 42 and pulsatorically connected to the slider 43, and a handwheel 45 connected to the transmission rod 44. The drive motor 1 is mounted on the slider 43. Understandably, the drive motor 1 is mounted on the slider 43, and the air gap is adjusted via the handwheel 45, with a disengagement distance of 100mm to 200mm, thus achieving the clutch function.

[0031] Furthermore, the laser measuring device 52 includes a first laser sensor, a second laser sensor, and a third laser sensor. The first laser sensor is used to measure the vibration value of the permanent disk 31, the second laser sensor is used to measure the axial displacement value of the permanent disk 31, and the third laser sensor is used to measure the radial offset value of the permanent disk 31. The total displacement of the permanent disk 31 can be calculated by vector synthesis based on the values ​​measured by the laser sensors.

[0032] The digital display device 53 includes a display screen, which is connected to the laser measuring device 52 via a data cable. The display screen can show the vibration amplitude and displacement offset. It automatically alarms when the vibration exceeds 3 mm / s or the radial / axial displacement exceeds 2 mm. The laser measuring device 52 and the digital display device 53 can be powered by wired or battery and replaced periodically. Alarms can be local or transmitted to the main control room. Handling of vibration exceeding limits can be initiated by alerting maintenance personnel, or a separate negative feedback system can be installed to adjust the air gap of the permanent magnet coupling transmission module 3. In this embodiment, the display screen and the laser measuring device 52 are located on opposite sides of the protective sleeve 51.

[0033] In addition, the protective sleeve 51 is an inverted U-shaped sealing protective sleeve. The function of the protective sleeve 51 is to prevent the transmission equipment from being affected by the failure of rotating machinery or by foreign objects. The protective sleeve 51 is provided with an observation hole 511, which is a small round hole, so as to observe the operating status of the permanent magnet disk 31 and the conductor disk 32. The thickness of the protective sleeve 51 is 1mm to 5mm, preferably 3mm. The protective sleeve 51 is made of stainless steel and has an IP66 protection rating. In some other embodiments, the protective sleeve 51 may also be made of other materials such as carbon steel or aluminum alloy, which is not specifically limited here.

[0034] Understandably, this drum mesh drive system, by setting up a permanent magnet disk 31 and a conductor disk 32, allows the drive motor 1 to drive the conductor disk 32 to rotate. The permanent magnet disk 31 generates torque through the magnetic field induction of the air gap, achieving torque transmission without mechanical connection and simultaneously achieving vibration isolation. Because the air gap blocks the vibration transmission path, the vibration amplitude attenuation on the drive motor 1 side is greatly reduced, and the input shaft of the reducer 2 only bears pure torque. In addition, the air gap can be adjusted by adjusting the adjustment component 4, which can disengage the faulty drive motor 1 to achieve a clutch function, and then push the spare drive motor 1 into engagement, enabling online maintenance without stopping the machine, thus improving production efficiency. This drum mesh drive system also integrates mechanical protection and optical monitoring functions by setting up a protective sleeve 51, a laser measuring device 52, and a digital display device 53. It can both physically protect the operation of the permanent magnet drive device and serve as a platform for the laser monitoring and display system.

[0035] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A drum and net drive system based on permanent magnet non-contact transmission, characterized in that, It includes a drive motor (1), a reducer (2), a permanent magnet coupling transmission module (3), an adjustment component (4), and a vibration monitoring module (5); The permanent magnet coupling transmission module (3) includes a permanent magnet disk (31) and a conductor disk (32). The permanent magnet disk (31) is connected to the input shaft of the reducer (2), and the conductor disk (32) is connected to the action shaft of the drive motor (1). An air gap is formed between the permanent magnet disk (31) and the conductor disk (32). The adjustment component (4) is connected to the drive motor (1) and is used to adjust the air gap. The vibration monitoring module (5) includes a protective sleeve (51), a laser measuring device (52), and a digital display device (53). The protective sleeve (51) is disposed on the outside of the permanent disk (31) and the conductor disk (32). The laser measuring device (52) is mounted on the protective sleeve (51) and is used to measure the vibration value and displacement of the permanent disk (31). The digital display device (53) is mounted on the protective sleeve (51) and is communicatively connected to the laser measuring device (52).

2. The drum and screen drive system based on permanent magnet non-contact transmission according to claim 1, characterized in that, The adjustment assembly (4) includes a support frame (41), a slide (42) connected to the support frame (41), a slider (43) movably connected to the slide (42), a transmission rod (44) mounted on the slide (42) and connected to the slider (43) for transmission, and a handwheel (45) connected to the transmission rod (44). The drive motor (1) is mounted on the slider (43).

3. The drum and net drive system based on permanent magnet non-contact transmission according to claim 1, characterized in that, The laser measuring device (52) includes a first laser sensor, a second laser sensor and a third laser sensor. The first laser sensor is used to measure the vibration value of the permanent disk (31), the second laser sensor is used to measure the axial displacement value of the permanent disk (31), and the third laser sensor is used to measure the radial offset value of the permanent disk (31).

4. The drum and screen drive system based on permanent magnet non-contact drive according to claim 1, characterized in that, The protective sleeve (51) is an inverted U-shaped sealing protective sleeve.

5. The permanent magnet non-contact drive based drum and mesh drive system of claim 1, wherein, The protective sleeve (51) is provided with an observation hole (511).

6. The permanent magnet non-contact drive based drum and mesh drive system of claim 1, wherein, The thickness of the protective sleeve (51) is 1 mm to 5 mm.

7. The permanent magnet non-contact drive based drum net drive system of claim 1, wherein, The protective sleeve (51) is made of stainless steel.

8. The permanent magnet non-contact drive based drum net drive system of claim 1, wherein, The digital display device (53) includes a display screen, which is connected to the laser measuring device (52) via a data cable.

9. The permanent magnet non-contact drive based drum net drive system of claim 1, wherein, The permanent magnet disk (31) is a neodymium iron boron magnetic ring.

10. The permanent magnet non-contact drive based drum net drive system of claim 1, wherein, The conductor disk (32) is a copper alloy conductor disk.

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