Auxiliary exciter stator assembling and disassembling device

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By designing the stator disassembly and assembly device of the secondary exciter machine, the synergistic effect of platform components, traction components and monitoring components is used to solve the problem of time and risk of disassembly and assembly of the secondary exciter machine stator disassembly and assembly, and safe and efficient stator separation and maintenance are achieved.

CN223309738UActive Publication Date: 2025-09-05GUANGXI FANGCHENGGANG NUCLEAR POWER +1

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Patent Information

Application Number: CN202422038065.7
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-08-21
Publication Date: 2025-09-05
Estimated Expiration: 2034-08-21

AI Technical Summary

Technical Problem

In the prior art, the disassembly and assembly process of the secondary exciter stator takes a long time and there is a risk of stator bumping, making it difficult to efficiently and safely perform stator maintenance.

Method used

A secondary exciter stator disassembly and assembly device including platform assembly, traction assembly, lifting assembly and monitoring assembly is designed. The stator is lifted and lowered through the lifting assembly, the stator is translated, and the displacement is monitored by the monitoring assembly to ensure that the stator is aligned with the platform clearance and axis to avoid bumps.

Benefits of technology

The stator of the secondary exciter is safe and reliable, which reduces the risk of bumps and improves work efficiency, ensures convenient separation of the stator and reduces manpower demand.

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Abstract

The utility model discloses an auxiliary exciter stator dismounting device. The auxiliary exciter stator dismounting device comprises a platform assembly, a traction assembly, a lifting assembly and a monitoring assembly. According to the auxiliary exciter stator dismounting device, the auxiliary exciter stator is driven by the lifting assembly to do lifting motion, the auxiliary exciter stator can be lifted, a certain gap is formed between the auxiliary exciter stator and the supporting platform, and the phenomenon that the auxiliary exciter stator and the supporting platform are gnawed due to the fact that the auxiliary exciter stator is directly moved is avoided; meanwhile, the traction assembly is used for driving the auxiliary exciter stator to do translational motion, so that the auxiliary exciter stator can move to the position above the extension platform from the position above the supporting platform, and the auxiliary exciter stator and the auxiliary exciter rotor are separated; and the auxiliary exciter stator and the auxiliary exciter rotor can be overhauled. And the displacement of the auxiliary exciter stator is monitored by using the monitoring assembly, so that the moving state of the auxiliary exciter stator can be monitored, and the working efficiency of the auxiliary exciter stator dismounting device is improved.

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Description

Technical Field

[0001] The utility model relates to the field of auxiliary exciter maintenance, in particular to a stator disassembly and assembly device for an auxiliary exciter. Background Art

[0002] The 5800kW brushless exciter is a key component of an 1100MW-class generator. Its main components include the AC exciter, rotating rectifier, and auxiliary exciter. According to national and industry preventive maintenance requirements for exciters, after a period of operation, the auxiliary exciter stator must be removed from the rotor for stator and rotor overhaul to ensure safety and stability for the next cycle.

[0003] The stator of an auxiliary exciter typically weighs over 2 tons. During stator extraction, a crane is required to lift the stator upwards. The stator is first lifted a certain distance, ensuring a gap between the stator and the auxiliary exciter baseplate and that the stator is not in contact with the pressure plate guide rails. The crane is then used to remove the auxiliary exciter stator. This method requires manual inspection of the gap between the stator and the auxiliary exciter baseplate and pressure plate guide rails, and requires a large number of personnel to adjust the axis of the auxiliary exciter stator to prevent collision with the rotor. This method is not only time-consuming but can also result in collisions between the stator and the rotor. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a stator disassembly and assembly device for an auxiliary exciter.

[0005] The technical solution adopted by the utility model to solve the technical problem is: constructing a stator disassembly and assembly device for an auxiliary exciter, which includes a platform component, a traction component, a lifting component and a monitoring component;

[0006] The platform assembly includes a supporting platform for supporting the stator of the auxiliary exciter and an extension platform connected to the supporting platform;

[0007] The traction assembly is connected to the platform assembly and is used to drive the auxiliary exciter stator to perform translational motion;

[0008] The lifting assembly is connected to the traction assembly and is used to drive the auxiliary exciter stator to perform lifting motion;

[0009] The monitoring component is used to monitor the displacement of the auxiliary exciter stator.

[0010] In some embodiments, the traction assembly includes a guide rail bracket, a guide rail connected to the guide rail bracket, a first slider, and a second slider;

[0011] The guide rail bracket is connected to the support platform and the extension platform at the same time;

[0012] The first sliding block and the second sliding block are both movably connected to the guide rail.

[0013] In some embodiments, the traction assembly further comprises a translation driver mounted on the extension platform, a connecting arm connected to the stator of the auxiliary exciter, and a connecting plate movably connected to the connecting arm;

[0014] The translation driver is connected to the connecting plate via a translation screw rod.

[0015] In some embodiments, a guide groove is provided on the connecting arm, the guide groove is arranged along the height direction of the connecting arm, and the connecting plate is installed on the guide groove.

[0016] In some embodiments, the lifting assembly includes a first lifting screw connected to the first slider, a crossbeam connected to the first lifting screw, and the crossbeam is connected to the connecting arm.

[0017] In some embodiments, the lifting assembly further includes a second lifting screw connected to the second slider, and a retaining member connected to the second lifting screw, wherein the retaining member is connected to the stator of the auxiliary exciter.

[0018] In some embodiments, both the first slider and the second slider are provided with weighing sensors.

[0019] In some embodiments, the monitoring component includes a lifting displacement sensor provided on the stator of the auxiliary exciter.

[0020] In some embodiments, the monitoring component includes a horizontal displacement sensor disposed on the extension platform.

[0021] In some embodiments, the auxiliary exciter stator disassembly and assembly device further includes a positioning assembly, and the positioning assembly includes a pressing plate connected to the extension platform and a positioning member installed on the pressing plate.

[0022] The implementation of the utility model has the following beneficial effects: the auxiliary exciter stator disassembly and assembly device drives the auxiliary exciter stator to perform lifting and lowering motion through the lifting assembly, which can lift the auxiliary exciter stator and allow a certain gap between the auxiliary exciter stator and the support platform, thereby avoiding the "interaction" phenomenon caused by direct movement of the auxiliary exciter stator and the support platform, thereby protecting the contact surface of the movable auxiliary exciter stator. At the same time, the auxiliary exciter stator is driven by the traction assembly to perform translational motion, which can move the auxiliary exciter stator from above the support platform to above the extension platform, separating the auxiliary exciter stator and the auxiliary exciter rotor, so that the auxiliary exciter stator and the auxiliary exciter rotor can be inspected and repaired. The monitoring assembly is used to monitor the displacement of the auxiliary exciter stator, which can be a lifting displacement or a horizontal displacement. The movement state of the auxiliary exciter stator can be monitored, which facilitates positioning and improves the working efficiency of the auxiliary exciter stator disassembly and assembly device. The auxiliary exciter stator disassembly and assembly device can complete the disassembly and assembly of the auxiliary exciter stator, making the auxiliary exciter disassembly and assembly process more reliable and reducing the probability of some risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with 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:

[0024] Figure 1 This is a schematic diagram of the overall structure of the auxiliary exciter stator disassembly and assembly device of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the connection arm and the connection plate of the utility model. DETAILED DESCRIPTION

[0026] 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 present 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.

[0027] 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, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions 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", and "third" are only used to facilitate the description of 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, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Reference Figure 1 and Figure 2 , is a device for disassembling and assembling an auxiliary exciter stator in some embodiments of the present invention, comprising a platform assembly 1, a traction assembly 2, a lifting assembly 3, and a monitoring assembly 4. The platform assembly 1 comprises a support platform 11 for supporting the auxiliary exciter stator 5 and an extension platform 12 connected to the support platform 11; the traction assembly 2 is connected to the platform assembly 1 and is used to drive the auxiliary exciter stator 5 to perform translational motion; the lifting assembly 3 is connected to the traction assembly 2 and is used to drive the auxiliary exciter stator 5 to perform lifting motion; and the monitoring assembly 4 is used to monitor the displacement of the auxiliary exciter stator 5.

[0029] As can be understood, the auxiliary exciter stator disassembly and assembly device drives the auxiliary exciter stator 5 to move up and down through the lifting assembly 3, thereby lifting the auxiliary exciter stator 5 and allowing a certain gap between the auxiliary exciter stator 5 and the support platform 11. This prevents direct movement of the auxiliary exciter stator 5, which would cause it to "gnaw" with the support platform 11, thereby protecting the contact surface of the movable auxiliary exciter stator 5. At the same time, the traction assembly 2 drives the auxiliary exciter stator 5 to move horizontally, allowing the auxiliary exciter stator 5 to move from above the support platform 11 to above the extension platform 12, separating the auxiliary exciter stator 5 from the auxiliary exciter rotor, allowing the auxiliary exciter stator 5 and the auxiliary exciter rotor to be inspected and repaired. The monitoring assembly 4 is used to monitor the displacement of the auxiliary exciter stator 5, which can be both lifting and horizontal displacement. This can monitor the movement status of the auxiliary exciter stator 5, facilitate positioning, and improve the working efficiency of the auxiliary exciter stator disassembly and assembly device. The auxiliary exciter stator disassembly and assembly device can complete the disassembly and assembly of the auxiliary exciter stator 5, making the auxiliary exciter disassembly and assembly process more reliable and reducing the probability of occurrence of some risks.

[0030] Specifically, the traction assembly 2 includes a guide rail bracket 21, a guide rail 22 connected to the guide rail bracket 21, a first slider 23, and a second slider 24. The guide rail bracket 21 is connected to both the support platform 11 and the extension platform 12. The first slider 23 and the second slider 24 are both movably connected to the guide rail 22. In this embodiment, there are two guide rail brackets 21, and the two guide rails 22 are symmetrically mounted on the support platform 11 and the extension platform 12. Each guide rail 22 is mounted to the guide rail bracket 21 via fasteners. Each guide rail 22 is provided with a first slider 23 and a second slider 24, and the first slider 23 and the second slider 24 are separated.

[0031] The traction assembly 2 further includes a translation driver 25 mounted on the extension platform 12, a connecting arm 26 connected to the auxiliary exciter stator 5, and a connecting plate 27 movably connected to the connecting arm 26. The translation driver 25 is connected to the connecting plate 27 via a translation screw 28. Figure 2 As shown, the connecting arm 26 is provided with a guide slot 261 extending along the height of the connecting arm 26, and the connecting plate 27 is mounted on the guide slot 261. The translation actuator 25, which can be a servo motor or a stepper motor, can drive the connecting arm 26 and the auxiliary exciter stator 5 to perform horizontal displacement, thereby moving the auxiliary exciter stator 5 from above the support platform 11 to above the extension platform 12. The provision of the guide slot 261 enables the auxiliary exciter stator 5 to be towed by the traction assembly 2 at different heights.

[0032] The lifting assembly 3 also includes a first lifting screw 31 connected to the first slider 23, a crossbeam 32 connected to the first lifting screw 31, and a connecting arm 26. The lifting assembly 3 also includes a second lifting screw 33 connected to the second slider 24, and a retainer 34 connected to the second lifting screw 33. The retainer 34 is connected to the auxiliary exciter stator 5. Driven by their respective lifting actuators, the first and second lifting screws 31 and 33 can simultaneously lift the crossbeam 32 and retainer 34, thereby raising the auxiliary exciter stator 5. In this embodiment, there are two retainers 34, each connected to either side of the bottom of the auxiliary exciter stator 5. The crossbeam 32 spans the support platform 11. Furthermore, there are two connecting arms 26, each connected to a common crossbeam 32, and a connecting plate 27 is installed between the two connecting arms 26.

[0033] The first slider 23 and the second slider 24 are both provided with weighing sensors 29 . The weighing sensors 29 are used to sense the force conditions of the sliders, so that the operator can intuitively judge the force conditions of the four sliders.

[0034] Furthermore, the monitoring component 4 includes a lifting displacement sensor 41 provided on the auxiliary exciter stator 5. The lifting displacement sensor 41 is specifically used to monitor the height distance between the auxiliary exciter stator 5 and the support platform 11 when the lifting component 3 lifts the auxiliary exciter stator 5, which can better ensure the convenience and safety during lifting.

[0035] The monitoring component 4 also includes a horizontal displacement sensor 42 provided on the extension platform 12. The horizontal displacement sensor 42 is specifically used to monitor the horizontal displacement distance of the auxiliary exciter stator 5 when the traction component 2 performs horizontal traction on the auxiliary exciter stator 5, so as to monitor the movement state of the auxiliary exciter stator 5 during the traction process, facilitate positioning, and improve traction efficiency.

[0036] The auxiliary exciter stator disassembly and assembly device further includes a positioning assembly 6, which includes a pressure plate 61 connected to the extension platform 12 and a positioning member 62 mounted on the pressure plate 61. The positioning member 62 can be a positioning screw that can limit the horizontal displacement movement distance of the auxiliary exciter stator 5.

[0037] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they 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 stator disassembly and assembly device for an auxiliary exciter, characterized in that: It comprises a platform component (1), a traction component (2), a lifting component (3) and a monitoring component (4); The platform assembly (1) comprises a supporting platform (11) for supporting the auxiliary exciter stator (5) and an extension platform (12) connected to the supporting platform (11); The traction assembly (2) is connected to the platform assembly (1) and is used to drive the auxiliary exciter stator (5) to perform translational movement; The lifting assembly (3) is connected to the traction assembly (2) and is used to drive the auxiliary exciter stator (5) to perform lifting motion; The monitoring component (4) is used to monitor the displacement of the auxiliary exciter stator (5).

2. The auxiliary exciter stator disassembly and assembly device according to claim 1, characterized in that: The traction assembly (2) comprises a guide rail bracket (21), a guide rail (22) connected to the guide rail bracket (21), a first slider (23) and a second slider (24); The guide rail bracket (21) is connected to the support platform (11) and the extension platform (12) at the same time; The first slider (23) and the second slider (24) are both movably connected to the guide rail (22).

3. The auxiliary exciter stator disassembly and assembly device according to claim 2, characterized in that: The traction assembly (2) further includes a translation driver (25) mounted on the extension platform (12), a connecting arm (26) connected to the auxiliary exciter stator (5), and a connecting plate (27) movably connected to the connecting arm (26); The translation driver (25) is connected to the connecting plate (27) via a translation screw rod (28).

4. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: A guide groove (261) is provided on the connecting arm (26), the guide groove (261) is arranged along the height direction of the connecting arm (26), and the connecting plate (27) is installed on the guide groove (261).

5. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: The lifting assembly (3) comprises a first lifting screw (31) connected to the first slider (23), a crossbeam (32) connected to the first lifting screw (31), and the crossbeam (32) is connected to the connecting arm (26).

6. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: The lifting assembly (3) further includes a second lifting screw (33) connected to the second slider (24), and a retaining member (34) connected to the second lifting screw (33), wherein the retaining member (34) is connected to the auxiliary exciter stator (5).

7. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: The first slider (23) and the second slider (24) are both provided with weighing sensors (29).

8. The auxiliary exciter stator disassembly and assembly device according to claim 1, characterized in that: The monitoring component (4) includes a lifting displacement sensor (41) provided on the auxiliary exciter stator (5).

9. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: The monitoring component (4) includes a horizontal displacement sensor (42) arranged on the extension platform (12).

10. The auxiliary exciter stator disassembly and assembly device according to claim 3, characterized in that: The auxiliary exciter stator disassembly and assembly device further comprises a positioning assembly (6), wherein the positioning assembly (6) comprises a pressing plate (61) connected to the extension platform (12) and a positioning member (62) mounted on the pressing plate (61).