Generator rotor insulation mounting device

Abstract

The utility model discloses a generator rotor insulation installation device belongs to steam turbine generator overhauling technical field. The device includes support frame, pressurizing crossbeam, at least two adjustable radial pressurizing mechanism and hot -blast heating mechanism. Support frame is fixed to the generator rotor outside through hydraulic clamping mechanism, and pressurizing crossbeam is rigid long pole, and its length is not less than the slot wedge length of generator rotor, and adjustable radial pressurizing mechanism is symmetrically arranged on pressurizing crossbeam, and includes fixed ring, telescopic drive part and pressurizing block, and is used for exerting even radial pressure to slot wedge, and hot -blast heating mechanism is detachably installed in pressurizing crossbeam inside, and is heated to slot wedge through hot -blast passage and air outlet, realizes the synchronous solidification of insulation material under the pressurizing state. The utility model can effectively improve insulation material filling uniformity and solidification quality, strengthens rotor operation stability, prevents the equipment failure caused by the insulation bad.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator maintenance technology, specifically a generator rotor insulation installation device. Background Technology

[0002] In the manufacturing and maintenance of large generator rotors (such as the QFSN-20-300 model), insulation treatment within the rotor coil slots is a crucial step. The area beneath the slot wedges needs to be filled with conformal materials, spacers, and other insulating materials to secure the coils and provide good insulation and heat dissipation. Traditional methods often rely on manually striking the slot wedges with a mallet, using impact force to position them. However, this method has the following problems: First, it will lead to uneven pressure. Manual tapping cannot guarantee uniform pressure along the length of the slot wedge, resulting in uneven stress on the insulating material under the wedge, with some areas not being filled properly and others being over-compressed.

[0003] Secondly, simultaneous curing is impossible. Insulating materials (especially conformal materials) require pressure curing at specific temperatures to achieve optimal performance. Traditional processes involve first tightening the slot wedges and then curing the entire material through baking. During the curing process, the material is in an "unconstrained" or "unevenly constrained" state, making it impossible to form a uniform and high-strength overall support.

[0004] These defects directly lead to uneven stress on connecting components such as conductive screws during rotor operation due to uneven thermal expansion and contraction of the coils. Over time, this causes the conductive screws to loosen and shift, eventually damaging the seal and causing hydrogen leakage, which is a major hidden danger to the safe operation of the generator. Utility Model Content

[0005] The purpose of this invention is to provide a generator rotor insulation mounting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a generator rotor insulation mounting device, comprising a support frame, a pressure beam, at least two adjustable radial pressure mechanisms and a hot air heating mechanism; The bottom of the support frame is in contact with the ground, and the two sides of the support frame are clamped and fixed to the outside of the generator rotor by a hydraulic clamping mechanism. The pressure beam is a rigid long rod, the length of which is greater than or equal to the slot wedge length of the generator rotor; The adjustable radial pressurization mechanism is symmetrically distributed at both ends and the middle of the pressurization beam. Each adjustable radial pressurization mechanism includes a fixing ring fixed to the outside of the pressurization beam, a vertically arranged telescopic drive member, and a pressurization block connected to the end of the telescopic drive member. The bottom surface of the pressurization block is adapted to the top contour of the slot wedge of the generator rotor. The hot air heating mechanism is detachably installed inside the pressure beam. The inside of the pressure beam has a hot air channel, and the lower surface of the pressure beam has multiple air outlets that connect to the hot air channel. The air outlets face the contact area between the pressure block and the slot wedge.

[0007] Preferably, the hot air heating mechanism includes a mounting end block, a fan, and an electric heating frame. The end of the pressure beam is provided with a slot, the mounting end block can be snapped into the slot, and the surface of the mounting end block is provided with an air inlet. The fan and the electric heating frame are both fixedly connected to the surface of the mounting end block, and the electric heating frame faces the output end of the fan.

[0008] Preferably, the surface damping rotatable connection of the pressure beam has a limiting baffle, and the limiting baffle in the vertical state can limit the installation end block.

[0009] Preferably, the telescopic drive component is a hydraulic cylinder or an electric push rod.

[0010] Preferably, a high-temperature resistant elastic gasket is also fixedly connected to the lower surface of the pressure block.

[0011] Preferably, a level is provided on the upper surface of the pressure beam, and a pressure sensor is provided on the inner side of the lower end of the fixing ring.

[0012] Preferably, a central controller is also fixedly connected to the surface of the support frame, and the telescopic drive, hot air heating mechanism and pressure sensor are all electrically connected to the central controller to control the pressurization pressure and heating temperature curve.

[0013] Beneficial effects This utility model provides a generator rotor insulation mounting device, which has the following advantages: 1. The generator rotor insulation mounting device, through multiple independently adjustable radial pressurizing mechanisms, can apply uniform and stable radial pressure to the entire slot wedge, ensuring that the insulation material below it is fully and uniformly compressed and filled, thereby forming an ideal support plane.

[0014] 2. The generator rotor insulation mounting device, by setting up a hot air heating mechanism, can heat the slot wedge while pressurizing, so that the conformal material under the slot wedge can be directly solidified and formed under the "optimal pressure state", which greatly improves the overall mechanical properties and dimensional stability of the insulation material.

[0015] 3. This generator rotor insulation mounting device, by setting a limit baffle, can limit the mounting end block, thereby achieving relative fixation between the mounting end block and the slot, and realizing the installation and fixation of the hot air heating mechanism. When it is necessary to disassemble and maintain the hot air heating mechanism, simply rotate the limit baffle to a horizontal position to release the limit on the mounting end block, and then pull the mounting end block out of the slot, thereby enabling quick disassembly of the hot air heating mechanism, which facilitates subsequent maintenance of the hot air heating mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a generator rotor insulation mounting device proposed in this utility model; Figure 2 This is a three-dimensional structural diagram of an adjustable radial pressure mechanism for a generator rotor insulation mounting device proposed in this utility model; Figure 3 This is a three-dimensional structural diagram of the hot air heating mechanism of a generator rotor insulation mounting device proposed in this utility model; Figure 4 This is a bottom-view three-dimensional structural diagram of the pressure beam of the generator rotor insulation mounting device proposed in this utility model; Figure 5 This utility model proposes a generator rotor insulation mounting device. Figure 2 A schematic diagram of the enlarged structure of A.

[0017] In the diagram: 1. Support frame; 2. Pressure beam; 3. Adjustable radial pressure mechanism; 4. Hot air heating mechanism; 5. Hydraulic clamping mechanism; 6. Central controller; 7. Generator rotor; 8. Slot wedge; 9. Fixing ring; 10. Telescopic drive component; 11. Pressure block; 12. Air outlet; 13. Mounting end block; 14. Fan; 15. Heating frame; 16. Slot; 17. Air inlet; 18. Limiting baffle; 19. High-temperature resistant elastic gasket; 20. Level; 21. Pressure sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a generator rotor insulation installation device, including a support frame 1, a pressure beam 2, at least two adjustable radial pressure mechanisms 3 and a hot air heating mechanism 4; The bottom of the support frame 1 is in contact with the ground. The two sides of the support frame 1 are clamped and fixed to the outside of the generator rotor 7 by the hydraulic clamping mechanism 5. The hydraulic clamping mechanism 5 consists of a hydraulic cylinder and a clamping plate. The clamping plate is driven by the hydraulic cylinder to clamp the outside of the generator rotor 7, thereby ensuring the fixing effect of the support frame 1 and effectively preventing the support frame 1 from being relatively displaced when the adjustable radial pressure mechanism 3 applies pressure.

[0023] The pressure beam 2 is a rigid long rod, the length of which is greater than or equal to the length of the slot wedge 8 of the generator rotor 7; Adjustable radial pressurization mechanisms 3 are symmetrically distributed at both ends and the middle of the pressurization beam 2. Each adjustable radial pressurization mechanism 3 includes a fixing ring 9 fixed to the outside of the pressurization beam 2, a vertically arranged telescopic drive member 10, and a pressurization block 11 connected to the end of the telescopic drive member 10. The telescopic drive member 10 is specifically a hydraulic cylinder or an electric push rod. The bottom surface of the pressurization block 11 is adapted to the top contour of the slot wedge 8 of the generator rotor 7 to ensure that the pressure can be effectively transmitted.

[0024] Through multiple independently adjustable radial pressure mechanisms 3, uniform and stable radial pressure can be applied to the entire slot wedge 8, ensuring that the insulating material below it is fully and uniformly compressed and filled, thereby forming an ideal support plane.

[0025] The hot air heating mechanism 4 is detachably installed inside the pressure beam 2. The pressure beam 2 has a hot air channel inside. The lower surface of the pressure beam 2 has multiple air outlets 12 that connect to the hot air channel. The air outlets 12 face the contact area between the pressure block 11 and the slot wedge 8, so that the slot wedge 8 can be locally and directionally heated.

[0026] The hot air heating mechanism 4 includes a mounting end block 13, a fan 14, and an electric heating frame 15. The end of the pressure beam 2 is provided with a slot 16, and the mounting end block 13 can be snapped into the slot 16. An air inlet hole 17 is provided on the surface of the mounting end block 13. The fan 14 and the electric heating frame 15 are both fixedly connected to the surface of the mounting end block 13, and the electric heating frame 15 faces the output end of the fan 14.

[0027] By setting up a hot air heating mechanism 4, the slot wedge 8 can be heated while being pressurized, so that the conformal material under the slot wedge 8 can be directly solidified and formed under the "optimal pressure state", which greatly improves the overall mechanical properties and dimensional stability of the insulating material.

[0028] The surface damping rotatable connection of the pressure beam 2 is a limiting baffle 18, and the vertical limiting baffle 18 can limit the mounting end block 13. By setting the limiting baffle 18, the mounting end block 13 can be limited, thereby realizing the relative fixation of the mounting end block 13 and the slot 16, and realizing the installation and fixation of the hot air heating mechanism 4. When the hot air heating mechanism 4 needs to be disassembled and maintained, it is only necessary to rotate the limiting baffle 18 to the horizontal state, release the limitation on the mounting end block 13, and then pull the mounting end block 13 out of the slot 16, thereby quickly disassembling the hot air heating mechanism 4, which provides convenience for the subsequent maintenance of the hot air heating mechanism 4.

[0029] A high-temperature resistant elastic pad 19 is also fixedly connected to the lower surface of the pressure block 11. By setting the high-temperature resistant elastic pad 19, it can play a role in buffering and equalizing pressure.

[0030] A level 20 is installed on the upper surface of the pressure beam 2, and a pressure sensor 21 is installed on the inner side of the lower end of the fixing ring 9. The stability of the pressurization process can be monitored by installing the level 20, and the pressure value of the pressurization process can be monitored by installing the pressure sensor 21.

[0031] The surface of the support frame 1 is also fixedly connected to the central controller 6. The telescopic drive component 10, the hot air heating mechanism 4 and the pressure sensor 21 are all electrically connected to the central controller 6 to control the pressurization pressure and heating temperature curves, thereby realizing the automated and programmed control of the pressurization pressure and heating temperature.

[0032] In practical applications, the insulating support system installed and fixed by this mounting device can effectively equalize and absorb the thermal stress of the rotor coil, greatly reducing the periodic impact on the conductive screws, thereby fundamentally preventing the conductive screws from loosening.

[0033] Working Principle: When using the generator rotor 7 insulation installation device, firstly, the entire support frame 1 is hoisted above the slot wedge 8 of the already placed generator rotor 7. The position of the entire device is adjusted so that each pressure block 11 is aligned with the top of the slot wedge 8, and the hydraulic clamping mechanism 5 is used to clamp it on the outside of the generator rotor 7 to fix the support frame 1. Then, the device is started. The central controller 6 controls each telescopic drive component 10 to move synchronously according to the preset program, applying downward pressure. The operator ensures that the pressure beam 2 is in a horizontal state using a level 20 and monitors the pressure at each point in real time through the readings of the pressure sensor 21. If necessary, fine adjustments can be made through the controller to ensure uniform pressure. While pressurizing, the hot air heating mechanism 4 is started. Hot air is blown onto the slot wedge 8 through the air outlet 12, raising its temperature to the curing temperature required for the conformal material. Under this temperature and pressure, the pressure is maintained for a period of time to allow the conformal material to fully cure. After curing, heating is stopped first, and after the temperature drops, the pressure is released and the device is removed. At this point, the slot wedge 8 and the insulating material under the wedge have been combined into a solid and stable whole, and then the generator rotor 7 can be rotated to pressurize the other slot wedges 8.

[0034] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A generator rotor insulation mounting device, characterized in that, It includes a support frame (1), a pressure beam (2), at least two adjustable radial pressure mechanisms (3) and a hot air heating mechanism (4); The bottom of the support frame (1) is in contact with the ground, and the two sides of the support frame (1) are clamped and fixed to the outside of the generator rotor (7) by the hydraulic clamping mechanism (5). The pressure beam (2) is a rigid long rod, the length of which is greater than or equal to the length of the slot wedge (8) of the generator rotor (7); The adjustable radial pressurization mechanism (3) is symmetrically distributed at both ends and the middle of the pressurization beam (2). Each adjustable radial pressurization mechanism (3) includes a fixing ring (9) fixed on the outside of the pressurization beam (2), a vertically arranged telescopic drive (10), and a pressurization block (11) connected to the end of the telescopic drive (10). The bottom surface of the pressurization block (11) is adapted to the top contour of the slot wedge (8) of the generator rotor (7). The hot air heating mechanism (4) is detachably installed inside the pressure beam (2). The inside of the pressure beam (2) is provided with a hot air channel. The lower surface of the pressure beam (2) is provided with multiple air outlets (12) that connect the hot air channels. The air outlets (12) face the contact area between the pressure block (11) and the groove wedge (8).

2. The generator rotor insulation mounting device according to claim 1, characterized in that: The hot air heating mechanism (4) includes a mounting end block (13), a fan (14) and an electric heating frame (15). The end of the pressure beam (2) is provided with a slot (16). The mounting end block (13) can be snapped into the slot (16). An air inlet hole (17) is provided on the surface of the mounting end block (13). The fan (14) and the electric heating frame (15) are both fixedly connected to the surface of the mounting end block (13). The electric heating frame (15) faces the output end of the fan (14).

3. The generator rotor insulation mounting device according to claim 2, characterized in that: The surface damping rotatable connection of the pressure beam (2) is limited by a baffle (18), and the baffle (18) in the vertical state can limit the mounting end block (13).

4. The generator rotor insulation mounting device according to claim 1, characterized in that: The telescopic drive component (10) is specifically a hydraulic cylinder or an electric push rod.

5. The generator rotor insulation mounting device according to claim 1, characterized in that: The lower surface of the pressure block (11) is also fixedly connected with a high-temperature resistant elastic gasket (19).

6. The generator rotor insulation mounting device according to claim 1, characterized in that: A level (20) is provided on the upper surface of the pressure beam (2), and a pressure sensor (21) is provided on the inner side of the lower end of the fixing ring (9).

7. A generator rotor insulation mounting device according to claim 6, characterized in that: The surface of the support frame (1) is also fixedly connected to a central controller (6). The telescopic drive (10), the hot air heating mechanism (4) and the pressure sensor (21) are all electrically connected to the central controller (6) to control the pressurization pressure and heating temperature curve.

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