Device for dismounting magnetic pole key of generator rotor

Abstract

The utility model relates to a device for dismounting a magnetic pole key of a generator rotor. The device for dismounting the magnetic pole key of the generator rotor comprises a supporting plate, a tensioning lead screw is vertically arranged in the middle of the supporting plate in a penetrating mode, two lifters are symmetrically arranged on the two sides of the tensioning lead screw, and the fixed ends of the lifters are connected with the lower end of the supporting plate; the upper end of the connecting piece is detachably connected with the lower end of the tensioning lead screw through mutual embedding of internal and external threads, and the lower end of the connecting piece is provided with a conical tip; wherein an adjusting nut is arranged at the upper end of the supporting plate, the adjusting nut is in threaded connection with the tensioning lead screw, and the conical tip is welded and fixed to the magnetic pole key. The connecting piece is installed at the lower end of the tensioning lead screw, the conical tip and the magnetic pole key are welded and fixed, the tensioning lead screw moves in the direction away from the magnetic pole key under the action of the lifter, so that the magnetic pole key is pulled out, only a new connecting piece needs to be replaced when next magnetic pole key dismantling operation needs to be carried out, the dismantling period duration is shortened, and the dismantling efficiency is improved. The operation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of removing magnetic pole keys of hydro-generators, and in particular to a device for removing magnetic pole keys of generator rotors. Background Art

[0002] Currently, in domestic hydropower station construction, generators are core equipment in the power system, and their long-term, stable, and safe operation is crucial to ensuring power supply. The rotor poles, as a crucial component of the generator rotor, are crucial for proper operation. However, during generator operation, various factors (such as equipment aging, overload operation, and external interference) may cause the rotor poles to malfunction or become damaged. In such cases, the generator requires inspection and maintenance, which includes removing and replacing the faulty rotor poles in the hydro-turbine generator rotor.

[0003] Removing the pole key is a very difficult task. The pole key structure has a slope ratio of 1:200 and is divided into two types: long and short keys. The long and short keys form a pair of pole keys. After tightening the pole key, the long and short keys are very tightly fitted, making it difficult to pull out. The pole key removal tool is required for removal.

[0004] The conventional method is to weld the upper end of the pole key to the pole key removal tool, and then use a jack to remove the pole key. However, each time the removal tool is pulled out, it needs to be cut and polished before the next pole key can be removed, resulting in a long removal cycle. Utility Model Content

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a device for removing the magnetic pole keys of a generator rotor.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] A device for removing a generator rotor magnetic pole key, the device for removing a generator rotor magnetic pole key comprising:

[0008] The support plate has a tensioning screw rod vertically passing through the middle thereof, and two lifters are symmetrically provided on both sides of the tensioning screw rod, and the fixed ends of the lifters are connected to the lower end of the support plate;

[0009] The connecting piece has an internal groove, and the groove is provided with an internal thread matching the external thread of the tensioning screw. The upper end of the connecting piece and the lower end of the tensioning screw are engaged with each other through the internal and external threads to achieve a detachable connection. The lower end of the connecting piece has a tapered tip;

[0010] Among them, an adjusting nut is provided at the upper end of the support plate, and the adjusting nut is threadedly connected to the tensioning screw rod, and the conical tip is welded and fixed to the magnetic pole key.

[0011] Optionally, a pad is provided between the lifter and the support plate, and the fixed end of the lifter is fixed to the pad by welding;

[0012] Two pairs of first notches are provided on the backing plate, and second notches corresponding to the first notches are provided on the support plate. The first notches and the second notches are internally threadedly connected with cross-recessed hexagonal head bolts.

[0013] Optionally, a washer is provided between the adjusting nut and the support plate.

[0014] Optionally, the lifter is a hydraulic jack.

[0015] Optionally, a nut handle is fixed to the upper end of the tensioning screw rod.

[0016] Optionally, the support plate is a rectangular steel plate.

[0017] The beneficial effects of the present application are as follows: the present application installs the connecting piece at the lower end of the tensioning screw, and the conical tip is welded and fixed to the magnetic pole key. The height of the support plate is adjusted by adjusting the nut so that the movable end of the lifter abuts against the corresponding position of the generator, and then the lifter is started. The tensioning screw is moved in the direction away from the magnetic pole key by the action of the lifter, thereby pulling out the magnetic pole key, thereby realizing the removal of the magnetic pole key. When the next magnetic pole key removal operation is required, only a new connecting piece needs to be replaced. In this way, the removal cycle time is reduced and the working efficiency is improved.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0020] Figure 1 1 is a front view of a device for removing a generator rotor magnetic pole key according to an embodiment of the present application;

[0021] Figure 2 1 is a side view of a device for removing a generator rotor pole key according to an embodiment of the present application;

[0022] Figure 3 It is a top view of the device for removing the generator rotor pole key shown in an embodiment of the present application.

[0023] Reference numerals: 1 support plate, 2 tensioning screw, 3 lifter, 4 connector, 5 conical tip, 6 adjusting nut, 7 pad, 8 cross-recessed hexagonal head bolt, 9 washer, 10 nut handle. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise expressly specified or limited. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0029] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0030] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0031] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to facilitate understanding by technical personnel.

[0032] Example 1:

[0033] See also Figures 1 to 3 A device for removing a generator rotor magnetic pole key, the device for removing a generator rotor magnetic pole key comprising:

[0034] A support plate 1 is provided with a tensioning screw rod 2 vertically passing through the middle thereof, and two lifters 3 are symmetrically provided on both sides of the tensioning screw rod 2, and the fixed ends of the lifters 3 are connected to the lower end of the support plate 1;

[0035] The connecting member 4 has an internal groove, and the groove is provided with an internal thread matching the external thread of the tensioning screw rod 2. The upper end of the connecting member 4 and the lower end of the tensioning screw rod 2 are interlocked with each other through internal and external threads to achieve a detachable connection. The lower end of the connecting member 4 has a tapered tip 5;

[0036] Among them, the upper end of the support plate 1 is provided with an adjusting nut 6, and the adjusting nut 6 is threadedly connected to the tensioning screw rod 2, and the conical tip 5 is welded and fixed to the magnetic pole key.

[0037] Specifically, a through hole is opened in the middle of the support plate 1 to allow the tensioning screw 2 to pass through. The tensioning screw 2 is vertically inserted into the support plate 1 through the through hole. The fixed end of the lifter 3 is welded or detachably connected to the lower end of the support plate 1. The lifters 3 are symmetrically arranged on both sides of the tensioning screw 2 to ensure that the force on both sides of the support plate 1 is balanced; the upper part of the connecting piece 4 is cylindrical, the interior of the cylinder is grooved, and the inner wall of the groove is provided with an internal thread matching the external thread of the tensioning screw 2. The connecting piece 4 is detachably mounted on the lower end of the tensioning screw 2 by a threaded connection, and the tapered tip 5 is welded or integrally formed with the connecting piece 4. The length of the connecting piece 4 and the tapered tip 5 is much smaller than the length of the tensioning screw 2;

[0038] When in use, the connecting piece 4 is installed on the lower end of the tensioning screw rod 2, and the conical tip 5 is welded and fixed to the magnetic pole key. The height of the support plate 1 is adjusted by adjusting the nut 6 so that the movable end of the lifter 3 abuts the corresponding position of the generator, and then the lifter 3 is started. The tensioning screw rod 2 is moved in the direction away from the magnetic pole key through the action of the lifter 3, thereby pulling out the magnetic pole key, thereby realizing the removal of the magnetic pole key. When the next magnetic pole key removal operation is required, only a new connecting piece 4 needs to be replaced. In this way, the removal cycle time is reduced and the working efficiency is improved.

[0039] In addition, in traditional pole key removal operations, the bottom of the tensioning screw 2 is usually welded to the pole key, and the next removal operation is achieved by replacing a new tensioning screw 2. This results in serious material waste. In this application, the length of the connecting member 4 and its tapered tip 5 is much smaller than the length of the tensioning screw 2. The connecting member 4 uses less material and has a low manufacturing cost. By replacing the new connecting member 4 instead of the new tensioning screw 2, material waste can be reduced and costs can be saved.

[0040] Example 2:

[0041] See also Figures 1 to 3 , based on embodiment 1, optionally, a pad 7 is provided between the lifter 3 and the support plate 1, and the fixed end of the lifter 3 and the pad 7 are fixed by welding;

[0042] Among them, two pairs of first notches are opened on the backing plate 7, and second notches corresponding to the first notches are opened on the support plate 1. The first notches and the second notches are internally threadedly connected with cross-recessed hexagonal head bolts 8.

[0043] Specifically, the backing plate 7 can be cut into a rectangular shape using a thin steel plate. When making it, its size is determined according to the size of the selected lifter 3. Holes are drilled and tapped at both ends or around the edges. The diameter of the backing plate 7 is determined by the selected cross-recessed hexagonal head bolt 8.

[0044] By connecting the cross-slotted hexagonal head bolt 8 with the inner threads of the first slot and the second slot, the lifter 3 and the support plate 1 are detachably connected, so that the replacement and installation of the lifter 3 are convenient.

[0045] Optionally, a washer 9 is provided between the adjusting nut 6 and the support plate 1 .

[0046] Specifically, the adjusting nut 6 and the washer 9 are selected according to the diameter of the selected tensioning screw 2. The washer 9 can protect the surface of the supported plate 1 from being scratched by the adjusting nut 6 and disperse the pressure of the adjusting nut 6 on the supporting plate 1.

[0047] Optionally, the lifter 3 is a hydraulic jack.

[0048] Specifically, the size of the hydraulic jack is selected based on the force between the pole keys, and two of the same model are used in pairs. Hydraulic jacks are self-locking, meaning they automatically lock into position when the piston reaches its apex, making operation safer and more reliable. Hydraulic jacks can withstand heavy loads, and their load-bearing capacity varies with the piston's stroke. Furthermore, hydraulic jacks offer advantages such as compact size, light weight, ease of operation, and strong adaptability.

[0049] Optionally, a nut handle 10 is fixed to the upper end of the tensioning screw rod 2.

[0050] Specifically, the lower end of the nut handle 10 is welded and fixed to the upper end of the tensioning screw rod 2. By providing the nut handle 10, it is convenient for the hand to hold it, thereby facilitating the movement of the device.

[0051] Optionally, the support plate 1 is a rectangular steel plate.

[0052] Specifically, the support plate 1 can be made of steel plate, and a rectangular structure is cut out of the steel plate. The thickness and other related dimensions are determined by the tensioning force of the magnetic pole key and the size of the lifter 3. A through hole should be drilled in the center of the support plate 1 to ensure that it is slightly larger than the diameter of the tensioning screw 2, and four slots should be drilled at appropriate positions at the four corners. The position of the slot is determined by the size of the selected lifter 3 to ensure that its width is slightly larger than the selected cross-slot hexagonal head bolt 8. The length is appropriately adjusted to ensure its adjustability and applicability.

[0053] In addition, this application also has the following advantages:

[0054] The structure is simple, the materials are easy to obtain, the production cost is low, and the on-site adaptability is strong. During the on-site installation process, it can be directly and quickly assembled together, which shortens the installation time, improves the construction efficiency, speeds up the construction progress, and ensures the safety of the operators.

[0055] It has the characteristics of low cost, simple production method, easy to master usage, recyclable and reusable, and little restriction by geographical environment and operator's technical level.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A device for removing the magnetic pole keys of a generator rotor, characterized in that: The device for removing the generator rotor pole key comprises: A support plate (1) is provided with a tensioning screw rod (2) vertically passing through the middle thereof, two lifters (3) are symmetrically provided on both sides of the tensioning screw rod (2), and the fixed ends of the lifters (3) are connected to the lower end of the support plate (1); The connecting piece (4) has an internal groove, and an internal thread matching the external thread of the tensioning screw rod (2) is provided in the groove. The upper end of the connecting piece (4) and the lower end of the tensioning screw rod (2) are interlocked with each other through internal and external threads to achieve a detachable connection. The lower end of the connecting piece (4) has a tapered tip (5); The upper end of the support plate (1) is provided with an adjusting nut (6), and the adjusting nut (6) is threadedly connected to the tensioning screw rod (2), and the conical tip (5) is fixed to the magnetic pole key by welding.

2. The device for removing the magnetic pole key of a generator rotor according to claim 1, characterized in that: A backing plate (7) is provided between the lifter (3) and the support plate (1), and the fixed end of the lifter (3) and the backing plate (7) are fixed by welding; The backing plate (7) is provided with two pairs of first notches, the support plate (1) is provided with second notches corresponding to the first notches, and the first notches and the second notches are internally threadedly connected with cross-slot hexagonal head bolts (8).

3. The device for removing the magnetic pole key of a generator rotor according to claim 1, characterized in that: A washer (9) is provided between the adjusting nut (6) and the supporting plate (1).

4. The device for removing the magnetic pole key of a generator rotor according to claim 1, characterized in that: The lifter (3) is a hydraulic jack.

5. The device for removing the magnetic pole key of a generator rotor according to claim 1, characterized in that: A nut handle (10) is fixed to the upper end of the tensioning screw rod (2).

6. The device for removing the magnetic pole key of a generator rotor according to claim 1, characterized in that: The support plate (1) is a rectangular steel plate.

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