Construction method, maintenance method and device of generator stator permanent alignment device

Abstract

The application belongs to the technical field of generator overhauling, and provides a construction method, an overhauling method and a device of a generator stator permanent alignment device. The construction method of the generator stator permanent alignment device comprises the following steps: measuring and finding a center line of a generator on a running layer of a steam turbine room; and determining all alignment positions of the generator according to the position of the center line of the generator on the running layer of the steam turbine room. One alignment position is arranged at each of four corners around the generator. Before pouring a foundation of the generator on the running layer of the steam turbine room, a fixed groove with a preset specification is pre-buried at each alignment position. After all the fixed grooves are pre-buried, concrete of the foundation of the generator on the running layer of the steam turbine room is poured.

Description

Technical Field

[0001] This invention belongs to the field of generator maintenance technology, and particularly relates to a construction method, maintenance method and device for a generator stator permanent alignment device. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Generators are the core of power equipment and an indispensable component of power plant operation. Due to their complex structure and large size, generators require major overhauls after a certain period of use to ensure normal operation and stable power output. The generator overhaul process includes: disassembling the generator, inspecting the generator instruments, inspecting the bearings, replacing parts, and reassembling the generator.

[0004] After the unit has been running for a certain period of time, during the overhaul of the unit, the concentricity of the generator and the turbine will be adjusted according to the turbine shaft system data. However, since the generator stator weighs 290T and the rotor weighs 66T, the total weight is about 356T. When it is necessary to move the generator, there are no support points on the operating platform, making it extremely difficult to adjust the generator.

[0005] The inventors discovered that currently, during generator overhauls, it is necessary to destroy the existing floor tiles around the generator and to install temporary embedded parts in the ground at designated locations as the foundation for the anchoring device. After each overhaul, all the tiles need to be removed and restored, and the same work will be repeated for the next overhaul. This causes significant damage to the overall appearance of the operating floor, is difficult to restore, and has high labor and material costs, as well as a long time cycle. Summary of the Invention

[0006] In order to solve the technical problems existing in the background art, the present invention provides a construction method, maintenance method and device for a generator stator permanent alignment device, which can avoid damage to the floor tiles around the generator and ensure the integrity of the entire operating floor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The first aspect of the present invention provides a construction method for a permanent alignment device for a generator stator.

[0009] In one or more embodiments, a method for constructing a permanent alignment device for a generator stator includes:

[0010] Measure and locate the centerline of the generator on the operating floor of the turbine hall;

[0011] Based on the position of the generator centerline on the turbine hall operating floor, determine all the alignment positions of the generator; among them, set one alignment position at each of the four corners around the generator.

[0012] Before pouring the generator foundation in the turbine hall operating floor, pre-embed fixed grooves of preset specifications at the alignment positions of each corner;

[0013] After all the fixed slots are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

[0014] In other embodiments, a method for constructing a permanent alignment device for a generator stator includes:

[0015] Measure and locate the centerline of the generator on the operating floor of the turbine hall;

[0016] Based on the position of the generator centerline on the turbine hall operating floor, determine all the alignment positions of the generator; among them, two alignment positions are set at each of the four corners around the generator.

[0017] Before the generator foundation of the turbine hall operating floor is poured, a fixed groove of a preset specification is pre-embedded in one of the two alignment positions at each corner, and an I-beam of a preset specification is pre-embedded in the other.

[0018] After all the fixed slots and I-beams are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

[0019] As one implementation method, the construction method of the generator stator permanent alignment device further includes:

[0020] The generator is installed using the pre-embedded I-beams at the alignment position;

[0021] After the generator is installed, cut the I-beams flush with the floor level of the turbine hall.

[0022] A second aspect of the present invention provides a permanent stator alignment device for a generator.

[0023] A generator stator permanent alignment device is prepared using the construction method of the generator stator permanent alignment device described above.

[0024] A third aspect of the present invention provides a method for overhauling a generator.

[0025] A generator maintenance method involves selecting an I-beam that matches the size of the fixing slot before generator maintenance; inserting the selected I-beam into the fixing slot as a support device for the jack to align the stator.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] Before the generator foundation of the turbine hall operating floor is poured, the present invention uses a pre-embedded fixed groove of a preset specification at each corner alignment position to serve as the base for the jack to align the stator, thus avoiding damage to the floor tiles of the operating floor and achieving rapid rooting without adding installation embedded parts, and each alignment process is simple.

[0028] After all the fixed slots are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

[0029] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Figure 1 This is a flowchart of the construction method for the generator stator permanent alignment device according to Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the fixing groove structure according to an embodiment of the present invention;

[0033] Figure 3 This is a flowchart of the construction method for the generator stator permanent alignment device according to Embodiment 2 of the present invention;

[0034] Figure 4 This is a schematic diagram of an I-beam structure according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of inserting an I-beam into a fixed slot before generator maintenance according to an embodiment of the present invention.

[0036] The components include: 1. Turbine room operating floor; 2. Fixing groove; 3. I-beams; and 4. Supporting devices. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Terminology Explanation:

[0041] A generator is a device that converts mechanical energy into electrical energy and is installed in a power plant.

[0042] Stator: This is the stationary part of the electric motor. The stator consists of three parts: the stator core, the stator windings, and the frame. The main function of the stator is to generate a rotating magnetic field.

[0043] Rotor: A rotating body supported by bearings. The rotor of an electric motor is generally composed of an iron core with coils wound around it, slip rings, fan blades, etc. The main function of the rotor is to be cut by magnetic lines of force in a rotating magnetic field and thus generate (output) current.

[0044] Example 1

[0045] according to Figure 1 This embodiment provides a construction method for a permanent alignment device for a generator stator, which specifically includes the following steps:

[0046] Step 1: Measure and locate the center line of the generator on the operating floor of the turbine hall.

[0047] In the specific implementation process, the location and specifications of the generator on the turbine hall operating floor are predetermined, and the center line of the generator on the turbine hall operating floor is measured by measuring and laying out.

[0048] Step 2: Determine all alignment positions of the generator based on the centerline position of the generator on the turbine hall operating floor; among them, set one alignment position at each of the four corners around the generator.

[0049] In the specific implementation process, all alignment positions of the generator are symmetrically arranged along the generator centerline axis of the turbine hall operating floor. This is conducive to accurate generator alignment, facilitates accurate removal of the generator stator later, and improves the efficiency of generator maintenance.

[0050] Step 3: Before pouring the generator foundation on the turbine hall operating floor, pre-embed fixed grooves of a predetermined specification at each corner alignment position. Specifically, the fixed grooves are rectangular grooves with open tops, such as... Figure 2 As shown.

[0051] It should be noted that the specifications and materials of the fixing groove can be specifically set by those skilled in the art according to the actual situation. For example, the fixing groove can be achieved by burying an iron box with a depth of 1 meter, a length of 260 mm, and a width of 160 mm at the alignment position.

[0052] In some alternative embodiments, the top of the fixing groove is flush with the floor level of the turbine room operating floor.

[0053] In some alternative embodiments, the top of the fixing groove is set at a height above the operating floor of the turbine room.

[0054] Step 4: After all the fixed slots are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

[0055] Example 2

[0056] like Figure 3 As shown in the figure, this embodiment provides a construction method for a permanent alignment device for a generator stator, which specifically includes the following steps:

[0057] Step 1: Measure and locate the center line of the generator on the operating floor of the turbine hall.

[0058] In the specific implementation process, the location and specifications of the generator on the turbine hall operating floor are predetermined, and the center line of the generator on the turbine hall operating floor is measured by measuring and laying out.

[0059] Step 2: Determine all alignment positions of the generator based on the centerline position of the generator on the turbine hall operating floor; among them, two alignment positions are set at each of the four corners around the generator.

[0060] In the specific implementation process, all alignment positions of the generator are symmetrically arranged along the generator centerline axis of the turbine hall operating floor. This is conducive to accurate generator alignment, facilitates accurate removal of the generator stator later, and improves the efficiency of generator maintenance.

[0061] Step 3: Before pouring the foundation for the generator on the turbine hall operating floor, pre-embed a fixed groove 2 of a pre-set specification in one of the two alignment positions at each corner, and pre-embed an I-beam 3 of a pre-set specification (e.g., a 250mm*150mm I-beam). Figure 4 As shown;

[0062] Specifically, the fixing groove 2 is a rectangular groove with an opening at the top, such as... Figure 2 As shown.

[0063] It should be noted that the specifications and materials of the fixing groove can be specifically set by those skilled in the art according to the actual situation. For example, the fixing groove can be achieved by burying an iron box with a depth of 1 meter, a length of 260 mm, and a width of 160 mm at the alignment position.

[0064] In some alternative embodiments, the top of the fixing groove 2 is flush with the floor surface 1 of the turbine room operating floor.

[0065] In some alternative embodiments, the top of the fixing groove 2 is set at a height above the operating floor 1 of the turbine room.

[0066] Step 4: After all the fixed slots and I-beams are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

[0067] In some other embodiments, the construction method of the generator stator permanent alignment device further includes:

[0068] The generator is installed using the pre-embedded I-beams at the alignment position;

[0069] After the generator is installed, cut the I-beams flush with the floor level of the turbine hall.

[0070] Example 3

[0071] This embodiment provides a generator stator permanent alignment device, which is prepared using the construction method of the generator stator permanent alignment device described in Embodiment 1 or Embodiment 2 above.

[0072] Example 4

[0073] This embodiment provides a generator maintenance method, wherein, before generator maintenance, an I-beam matching the size of the fixing slot 2 is selected; the selected I-beam is inserted into the fixing slot, serving as a support device 4 for the jack to align the stator. Figure 5 As shown.

[0074] Understandably, the steps in generator maintenance, such as disassembling the generator, inspecting generator instruments, inspecting bearings, replacing parts, and assembling the generator, can all be accomplished using existing methods, and will not be detailed here.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for a permanent stator alignment device for a generator, characterized in that, include: Measure and locate the centerline of the generator on the operating floor of the turbine hall; Based on the position of the generator centerline on the turbine hall operating floor, determine all the alignment positions of the generator; among them, set one alignment position at each of the four corners around the generator. Before pouring the generator foundation in the turbine hall operating floor, pre-embed fixed grooves of preset specifications at the alignment positions of each corner; After all the fixed slots are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

2. The construction method of the generator stator permanent alignment device as described in claim 1, characterized in that, All alignment positions of the generator are symmetrically arranged along the generator centerline axis on the turbine hall operating floor.

3. The construction method of the generator stator permanent alignment device as described in claim 1, characterized in that, The fixing groove is a rectangular groove with an opening at the top.

4. The construction method of the generator stator permanent alignment device as described in claim 1, characterized in that, The top of the fixing groove is flush with or higher than the floor level of the turbine room operating floor by a set height.

5. A construction method for a permanent stator alignment device for a generator, characterized in that, include: Measure and locate the centerline of the generator on the operating floor of the turbine hall; Based on the position of the generator centerline on the turbine hall operating floor, determine all the alignment positions of the generator; among them, two alignment positions are set at each of the four corners around the generator. Before the generator foundation of the turbine hall operating floor is poured, a fixed groove of a preset specification is pre-embedded in one of the two alignment positions at each corner, and an I-beam of a preset specification is pre-embedded in the other. After all the fixed slots and I-beams are pre-embedded, pour the concrete for the generator foundation of the turbine hall operating floor.

6. The construction method of the generator stator permanent alignment device as described in claim 5, characterized in that, The construction method for the permanent alignment device for the generator stator also includes: The generator is installed using the pre-embedded I-beams at the alignment position; After the generator is installed, cut the I-beams flush with the floor level of the turbine hall.

7. The construction method of the generator stator permanent alignment device as described in claim 5 or 6, characterized in that, All alignment positions of the generator are symmetrically arranged along the generator centerline axis on the turbine hall operating floor.

8. The construction method of the generator stator permanent alignment device as described in claim 5, characterized in that, The fixing groove is a rectangular groove with an opening at the top; or The top of the fixing groove is flush with or higher than the floor level of the turbine room operating floor by a set height.

9. A permanent stator alignment device for a generator, characterized in that, It is manufactured using the construction method of the generator stator permanent alignment device as described in any one of claims 1-4; Alternatively, it can be prepared using the construction method of the generator stator permanent alignment device as described in any one of claims 5-8.

10. A generator overhaul method, characterized in that, When using the permanent stator alignment device as described in claim 9 for generator maintenance, before the generator maintenance, select an I-beam that matches the size of the fixing slot; insert the selected I-beam into the fixing slot as a support device for the jack to align the stator.

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