Rotor turnover device

Abstract

The invention provides a rotor turnover device, and relates to the technical field of gas turbine equipment. The rotor overturning device comprises a supporting platform which comprises a first support, a second support and a third support; the two rotating shaft limiting assemblies are respectively fixed on the first bracket and the second bracket; two trunnions are arranged on the switching disc and are respectively embedded into the two rotating shaft limiting assemblies; the transfer hanging ring is fixedly connected with a front journal of the rotor; the limiting rotary supporting plate is fixedly arranged on the third bracket; and a front journal of the rotor is embedded into the limiting rotary supporting plate. The rotor turnover device can perform multi-degree-of-freedom turnover on the gas compressor rotor, one lifting point is reduced compared with a traditional turnover mode, the requirement for the operation ability of operators is weakened, the possibility of risk generation in the rotor turnover process is reduced, and reliable and safe multi-degree-of-freedom turnover work of the gas compressor rotor is achieved. And therefore, the overturning efficiency and safety are improved, and the stability of multi-degree-of-freedom and multi-angle overturning of the gas compressor rotor is improved.

Description

Technical Field

[0001] This application relates to the field of gas turbine equipment technology, and more specifically, to a rotor reversing device. Background Technology

[0002] During the assembly of the gas turbine compressor rotor, the 4th to 17th stage drums of the compressor rotor need to be rotated from a vertical position with the small end of the journal facing upwards and the large end facing downwards to a horizontal position. To ensure the overall imbalance of the compressor rotor, pre-balancing and final balancing of the drums are required. The 4th to 17th stage drums are machined on a horizontal lathe and then hoisted onto a horizontal dynamic balancing machine for initial pre-balancing and final balancing. After final balancing, the 1st to 3rd stage drums are installed, completing the compressor rotor assembly. During the drum assembly and balancing process, the compressor rotor needs to be rotated multiple times. The commonly used rotation method is to use two cranes to lift the rotor into the air, with the two cranes working together to complete the rotation assembly.

[0003] However, when the compressor rotor is flipped, the center of gravity will dynamically shift with the change of angle. The two cranes need to adjust the load in real time, which requires high skill from the operators. Moreover, the lifting process requires the two cranes to cooperate with each other, with a low fault tolerance. The flipped working state is risky and dangerous, and can easily cause damage to the compressor rotor. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a rotor reversing device that reduces the potential risks associated with the compressor rotor reversing process, enables reliable and safe multi-degree-of-freedom reversing of the compressor rotor, and improves the assembly efficiency of the compressor rotor.

[0005] This application provides a rotor reversing device for use in a gas turbine, comprising:

[0006] A support platform for supporting the rotor of a gas turbine includes: a first bracket, a second bracket, and a third bracket;

[0007] Two pivot limiting components are fixed on the first bracket and the second bracket respectively, and are used to connect the trunnion on the adapter plate;

[0008] An adapter plate is used to fix the rear journal of the rotor; the adapter plate is provided with two trunnions; the two trunnions are respectively used to be embedded in the two shaft limiting assemblies;

[0009] Adapter eyelet for securing the front journal of the rotor;

[0010] A limiting rotary support plate is fixedly mounted on the third bracket; when the rotor rotates at a preset angle, the front journal of the rotor is embedded in the limiting rotary support plate.

[0011] In one alternative embodiment, the adapter ring includes: a flange and a lifting ring;

[0012] The flange and the lifting ring are fixedly connected; the flange is also used to fixally connect to the front journal of the rotor.

[0013] In one optional embodiment, the adapter ring further includes: an auxiliary support shaft;

[0014] The auxiliary support shaft is fixedly connected to the flange, and the auxiliary support shaft is used to insert into the hollow shaft of the rotor front journal.

[0015] In one alternative embodiment, the adapter plate includes:

[0016] A flat plate for supporting the rear journal of the rotor;

[0017] A pad is provided on the flat plate;

[0018] A pressure plate is used to press the drum end face on the rear journal of the rotor onto the pad;

[0019] The trunnion is fixedly connected to the plate.

[0020] Buffer strips are provided between the pressure plate and the end face of the drum, and between the pad and the end face of the drum.

[0021] In an alternative embodiment, the adapter plate further includes at least two lifting rings;

[0022] At least two of the lifting rings are fixedly connected to the plate, and the lifting rings are used in conjunction with the adapter lifting ring to lift the rotor of the gas turbine.

[0023] In an optional embodiment, the pivot limiting assembly includes:

[0024] A support, which is fixed to the first bracket or the second bracket; the support is provided with a trunnion groove;

[0025] A cover plate, fixed to the support, is used to limit the radial displacement of the trunnion after the trunnion is embedded in the trunnion groove.

[0026] In one alternative embodiment, one side of the cover plate is hinged to the support, and the other side of the cover plate is fixed to the support;

[0027] A handle for moving the cover plate is fixedly provided on the cover plate.

[0028] In an optional embodiment, the limiting rotary support plate includes:

[0029] The support base includes two support members; the two support members are fixed on the third bracket, and each support member is provided with a trunnion hole;

[0030] The support plate has support plate trunnions at both ends; the support plate trunnions are located in the trunnion holes; the support plate has a groove for accommodating the front journal of the rotor;

[0031] A pressure cap, fixed on the support plate, is used to limit the radial displacement of the front journal of the rotor after the front journal of the rotor is embedded in the groove;

[0032] An axial limiting clamp is used to fix the front journal of the rotor and to limit the axial displacement of the front journal of the rotor after it is embedded in the groove.

[0033] In one alternative embodiment, a protective pad is provided on the contact surface between the front journal of the rotor and the support plate and the pressure cover.

[0034] In one optional embodiment, the bottom of the third bracket is provided with a slider self-locking device;

[0035] The slider self-locking device is used to adjust the distance between the limiting rotary support plate and the rotating shaft limiting assembly according to the rotor length.

[0036] This application provides a rotor tilting device, comprising: a support platform for supporting a gas turbine rotor, including: a first bracket, a second bracket, and a third bracket; two shaft limiting assemblies, respectively fixed on the first and second brackets, for connecting trunnions on a transfer plate; a transfer plate for fixing and connecting the rear journal of the rotor; two trunnions are provided on the transfer plate; the two trunnions are respectively used to be embedded in the two shaft limiting assemblies; a transfer lifting ring for fixing and connecting the front journal of the rotor; and a limiting rotary support plate fixedly disposed on the third bracket; when the rotor rotates at a preset angle, the front journal of the rotor is embedded in the limiting rotary support plate. This rotor tilting device can tilt the compressor rotor with multiple degrees of freedom, reducing one lifting point compared to traditional tilting methods, weakening the requirements for operator skills, reducing the possibility of risks during rotor tilting, and achieving reliable and safe multi-degree-of-freedom tilting of the compressor rotor. This improves tilting efficiency and safety, and enhances the stability of multi-degree-of-freedom, multi-angle tilting of the compressor rotor. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a rotor reversing device provided in an embodiment of this application.

[0038] Figure 2 This is a schematic diagram of the structure of the adapter ring provided in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram of the adapter plate provided in an embodiment of this application.

[0040] Figure 4 This is a schematic diagram of the structure of the rotating shaft limiting component provided in the embodiments of this application.

[0041] Figure 5 This is a schematic diagram of the structure of the limiting rotary pallet provided in the embodiments of this application.

[0042] Figure 6 This is a schematic diagram of another rotor reversing device provided in an embodiment of this application.

[0043] Among them, 1-support platform; 11-first bracket; 12-second bracket; 13-third bracket; 2-rotating shaft limiting assembly; 21-support; 22-cover plate; 23-handle; 3-adapter plate; 31-flat plate; 32-pad plate; 33-pressure plate; 34-trunnion; 35-buffer strip; 4-adapter lifting ring; 41-lifting ring; 42-flange; 43-auxiliary support shaft; 5-limiting rotary support plate; 51-support component; 52-support plate; 53-support plate trunnion; 54-pressure cover; 55-axial limiting clamp; 6-laying plate; 7-adjustable support foot. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Although some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the accompanying drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0045] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0048] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0049] In related technologies, during the assembly of a gas turbine compressor rotor, in addition to the manufacturing and assembly of each component, additional machining is required on each drum during assembly to ensure compliance with the dimensional requirements of the mounting edges between the drums. The drums are assembled using interference fits on the mounting edges and the installation of radial pins and end bolts. To ensure compliance with the dimensional and positional requirements of the pin holes and bolt holes between the drums and to prevent misalignment of the mounting edges, the mounting edge surfaces of each drum need to be drilled, reamed, or bored after cold and hot assembly, and then positioned using pins and bolts. To ensure the overall imbalance of the compressor rotor, pre-balancing and final balancing of the rotor drums are required before and after machining.

[0050] During the drum assembly and balancing process, the compressor rotor's 4th to 17th stage drums need to be rotated from a vertical position (0° position in this design) with the small end of the journal facing upwards and the large end of the mounting edge facing downwards to a horizontal position (90° position in this design). The compressor rotor is then hoisted onto a horizontal lathe for machining of the 4th to 17th stage drums. The compressor rotor is then hoisted onto a horizontal dynamic balancing machine for initial and final dynamic balancing. Afterwards, the compressor rotor needs to be rotated from a horizontal position (90° position in this design) to a vertical position (180° position in this design) with the small end of the journal facing downwards and the large end of the mounting edge facing upwards. Holes are drilled at the large end face of the mounting edge. Finally, the 4th to 17th stage drums are rotated from the 180° position to the 90° position, and the 1st to 3rd stage drums are installed. This completes the machining and assembly of the compressor rotor, and the compressor rotor is then transported. During the drum assembly process, the 4th to 17th stage drums undergo multiple rotations at 0°, 90°, and 180° positions. During the installation of stage 1 to 3 compressor drums, there are angle requirements for the assembly and drilling processes of stage 1 to 3 compressor drums. Therefore, it is necessary to adjust the orientation of the compressor rotor after balancing at 90° position. That is, adjusting the circumferential angular position of the compressor rotor with the axis as the rotation axis is also a technical problem that urgently needs to be solved.

[0051] Currently, the method for rotating compressor rotors involves using two cranes to lift the rotor into the air from both ends, with the two cranes working together to complete the rotation and assembly. This method has limitations; it cannot adjust the rotor's circumferential direction along its axis. Furthermore, the compressor rotor's drum and discs have sealing grates, and each disc has tenons for mounting blades. The lifting straps are highly susceptible to damaging these grates, affecting the gas turbine's air seal and rotor lifespan. During rotor rotation, the lifting straps come into contact with the tenons, causing deformation or even severing the straps, posing a risk of the rotor falling. During lifting, the compressor rotor's center of gravity dynamically shifts with the angle, requiring real-time load adjustments by both cranes, placing high demands on operators. Moreover, the lifting process requires close coordination between the two cranes, resulting in a low margin for error, and the rotation process itself is highly risky, dangerous, and uncontrollable.

[0052] In response to the problems existing in the aforementioned related technologies, such as Figure 1 As shown, this embodiment provides a rotor reversing device that can be applied to the rotor of a gas turbine. See [link to documentation]. Figure 1 -A front view and Figure 1 As shown in the left view of -B, this rotor tilting device is capable of tilting the compressor rotor ( Figure 1 The dashed line represents the compressor rotor. It rotates from a vertical position with the small end of the journal facing upwards and the large end of the mounting edge facing downwards to a horizontal position, and then rotates from the horizontal position to another vertical position with the small end of the journal facing downwards and the large end of the mounting edge facing upwards. The rotor rotation device provided in this embodiment includes:

[0053] Support platform 1, used to support the rotor of the gas turbine, includes a first bracket 11, a second bracket 12, and a third bracket 13, providing a stable basic support structure for the rotor's rotation operation. The first bracket 11 and the second bracket 12 are used to fix and connect the rear journal of the rotor, i.e., to support the large end of the mounting edge on the rotor. The third bracket 13 is used to fix and connect the front journal of the rotor, i.e., to support the small end of the journal on the rotor.

[0054] In this embodiment, the combination of the first bracket 11, the second bracket 12, and the third bracket 13 ensures the rotor remains stable during the flipping process, preventing tilting or falling during the flipping operation (which requires angle adjustment using the adapter plate 3, the shaft limiting assembly 2, and the limiting rotary support plate 5), thus ensuring operational safety. It provides support points for the rotor's installation and operation, enabling the various parts of the rotor flipping device to work collaboratively to achieve the rotor's preset angle of rotation, meeting the rotor's flipping operation requirements during assembly.

[0055] Adapter ring 4 is used to fix the front journal of the rotor.

[0056] In this embodiment, the adapter ring 4 is fixed to the front journal of the rotor, ensuring a stable connection of the front journal during the rotation process and preventing problems such as shaking or displacement of the rotor during rotation, thus ensuring the safety and accuracy of the rotor rotation operation. The adapter ring 4 also provides a connection point for the rotor rotation operation, facilitating the adjustment of the rotor's attitude and rotation at a preset angle in conjunction with other devices (such as lifting equipment).

[0057] In an alternative embodiment, see Figure 2 The adapter lifting ring 4 includes: a flange 42 and a lifting ring 41; the flange 42 and the lifting ring 41 are fixedly connected; the flange 42 is also used for fixed connection with the front journal of the rotor. Further, the adapter lifting ring 4 also includes: an auxiliary support shaft 43; the auxiliary support shaft 43 is fixedly connected to the flange 42, and the auxiliary support shaft 43 is used to insert into the hollow shaft of the front journal of the rotor.

[0058] In this embodiment, the lifting ring 41 can be fixedly connected to one side of the flange 42 by bolts, and the other side of the flange 42 can be fixedly connected to the front journal of the rotor by bolts, thereby forming a stable connection structure between the lifting ring 41 and the front journal of the rotor. The lifting ring 41 is indirectly fixedly connected to the front journal of the rotor through the flange 42, ensuring the reliability of the connection between the transfer lifting ring 41 and the front journal of the rotor, and preventing loosening during rotor flipping and other operations, thus ensuring operational safety. It is understood that in other embodiments, the flange 42 can also be set as other types of connecting parts, as long as it can help form a stable connection structure between the lifting ring 41 and the front journal of the rotor, other aspects are not limited. Furthermore, an auxiliary support shaft 43 is fixedly connected to the other side of the flange 42 (the side of the flange 42 that is fixedly connected to the front journal of the rotor). The auxiliary support shaft 43 can be fixedly connected to the flange 42 by bolts, and the auxiliary support shaft 43 is inserted into the hollow shaft of the front journal of the rotor. During the rotor reversal process, the auxiliary support shaft 43 plays an auxiliary support role, reducing the concentrated stress on the bolts between the lifting ring 41 and the flange 42, as well as the bolts between the flange 42 and the rotor front journal, thereby reducing the lifting risk caused by bolt breakage during the reversal process.

[0059] The adapter plate 3 is used to fix the rear journal of the rotor; the adapter plate 3 is provided with two trunnions 34; the two trunnions 34 are respectively used to be embedded in the two shaft limiting components 2.

[0060] In this embodiment, the adapter plate 3 is fixedly connected to the rear journal of the rotor, providing a connection support point for the rotor's flipping operation and ensuring a stable connection during the flipping process. The two trunnions 34 of the adapter plate 3 are respectively embedded in the two shaft limiting assemblies 2, serving as the rotation fulcrum for rotor flipping. Through the cooperation between the trunnions 34 and the shaft limiting assemblies 2, the rotor can rotate around the trunnions 34 at a preset angle (from 0° vertical to 90° horizontal to 180° reverse), meeting the rotor's requirements for adjusting the flipping angle during assembly and processing, and ensuring the smooth operation of the flipping process.

[0061] In one embodiment of this application, the two trunnions 34 extend in the same straight line, that is, the two trunnions 34 may be set at different positions on the edge of the adapter plate 3 and extend in opposite directions along the same straight line.

[0062] Furthermore, the two trunnions 34 of the adapter plate 3 adopt an eccentric structure, that is, the line connecting the two trunnions 34 on the adapter plate 3 does not pass through the center point of the adapter plate 3, and the line connecting the two trunnions 34 is located on the side of the adapter plate 3 away from the rotor rotation direction. When the rotor rotates, the two trunnions 34 of the adapter plate 3 rotate around the shaft limiting assembly 2 as the fulcrum, driving the compressor rotor to rotate at an angle and rotate the rotor to a horizontal state (90° position in this scheme), so that the front journal of the rotor falls on the limiting rotary support plate 5.

[0063] In this embodiment, the eccentric structure of the two trunnions 34 of the adapter plate 3 and the synergistic effect of gravity enable the rotor to rotate automatically and stably without the need for a complex external drive mechanism, simplifying the operation process. The positioning of the limiting rotary support plate 5 ensures that the rotor is in a horizontal and stable position after rotation, providing a precise positional reference for subsequent assembly and processing, thus guaranteeing the accuracy and safety of the operation.

[0064] In an alternative embodiment, see Figure 3 Adapter 3 includes:

[0065] Plate 31 is used to support the rear journal of the rotor. Plate 31 is the basic load-bearing component of the adapter plate 3, directly supporting the rear journal of the rotor and providing an installation reference for other components (pad 32, pressure plate 33, trunnion 34, lifting ring). Specifically, as a load-bearing component, the size of plate 31 must be larger than the size of the component it supports, that is, the size of plate 31 must be larger than the size of the drum end face.

[0066] A pad 32 is placed on the flat plate 31. The pad 32 serves to level and distribute pressure, preventing excessive localized stress caused by direct contact between the drum end face and the flat plate 31. When pressing the drum end face, the pad 32 is first placed on the flat plate 31, and then the drum end face is placed on the pad 32. Therefore, the size of the pad 32 must be larger than the size of the drum end face.

[0067] The pressure plate 33 is used to press the drum end face on the rear journal of the rotor onto the pad 32. The pressure plate 33 is fixed to the plate 31 by bolts. The drum end face is placed on the pad 32. The pressure plate 33 fastens the drum end face onto the pad 32 by pressing, locking the rear journal of the rotor and preventing it from shifting or loosening during the flipping and hoisting process.

[0068] The trunnion 34 is fixedly connected to the plate 31; the trunnion 34 serves as the rotation fulcrum for rotor rotation and works with the shaft limiting assembly 2 to adjust the rotor angle.

[0069] Buffer strips 35 are provided between the pressure plate 33 and the end face of the drum, and between the pad 32 and the end face of the drum, to prevent damage to the surface of the end face of the drum during the flipping process.

[0070] Adapter plate 3 also includes: at least two lifting rings;

[0071] At least two lifting rings are fixedly connected to the plate 31. The lifting rings are used to cooperate with the transfer lifting ring 4 to lift the rotor of the gas turbine. The line connecting the two lifting rings is located on the side of the transfer plate 3 away from the rotor flipping direction, so that after the rotor flips, the two lifting rings are located above the center of gravity of the transfer plate 3, which facilitates the lifting.

[0072] In this embodiment, the compressor rotor drum end face mounting edge is pressed onto the pad 32 on the plate 31 by a pressure plate 33. Buffer strips 35 are arranged on the contact surfaces (drum end face) of the pressure plate 33 and the pad 32, respectively. The buffer strips 35 are used to buffer vibration, absorb impact force, reduce direct friction between metal parts, prevent damage to the pressing surface of the parts during the flipping process, protect the surface accuracy of the rotor drum end face and the adapter plate 3 itself, and avoid wear and deformation. Trunnions 34 are provided on both sides of the plate 31, and the trunnions 34 are placed in trunnion grooves. The plate 31 rotates around the virtual connection line of the two trunnions 34 as the axis of rotation, thereby achieving the rotor flipping effect. At least two lifting rings are provided on the plate 31, and these lifting rings cooperate with the adapter lifting ring 4 to provide symmetrical force connection points for the overall rotor lifting, ensuring balanced force and stable posture of the rotor during lifting. During assembly, the pad 32 is first fixed onto the plate 31, and a buffer strip 35 is placed on the surface of the pad 32. Then, the drum end face of the rotor's rear journal is placed against the buffer strip 35. Next, another set of buffer strips 35 is placed above the drum end face, and finally, the pressure plate 33 is used to press and lock the rotor's rear journal to the adapter plate 3, completing the fixation of the rotor's rear journal to the adapter plate 3. The trunnion 34 and the lifting ring are pre-fixed on the plate 31, adapting to both tilting and lifting scenarios. Through the three-layer fixing structure of the plate 31, pad 32, and pressure plate 33, the rotor's rear journal is stably positioned, providing a reliable connection foundation for tilting and lifting operations. The buffer strip 35 is a key component protecting the rotor and adapter plate 3, preventing damage caused by hard contact and extending the equipment's service life. The cooperation between the lifting ring and the adapter lifting ring 4 supplements the rotor lifting function, enabling the adapter plate 3 to meet both tilting requirements and overall lifting scenarios, improving the versatility and ease of operation of the adapter plate 3.

[0073] In an optional embodiment, two pivot limiting components 2 are fixed on the first bracket 11 and the second bracket 12 respectively, for connecting the trunnion 34 on the adapter plate 3.

[0074] In this embodiment, the two pivot limiting components 2 provide suitable mounting and support positions for the trunnions 34 on the adapter plate 3, making them fixed fulcrums for rotor rotation. The mating relationship between the pivot limiting components 2 and the trunnions 34 ensures that the rotation axes of the two trunnions 34 are completely coincident and maintain this state throughout the rotation process. This avoids offset and wobbling issues, providing a reliable rotational reference for rotor rotation. Since the pivot limiting components 2 limit the displacement of the trunnions 34, they can effectively counteract the unbalanced forces generated by the eccentric structure during rotor rotation, reducing swaying and impact during rotor rotation. This avoids rotor collisions and wear due to severe wobbling, and also prevents structural damage caused by uneven force at the connection between the trunnions 34 and the pivot limiting components 2. The high-precision mating between the pivot limiting components 2 and the trunnions 34 can strictly constrain the rotor's rotation path, making the rotor's rotation process from the initial posture to the horizontal posture predictable and controllable, ultimately achieving precise docking between the front journal and the front limiting rotary support plate 5, avoiding the impact of positioning deviations on subsequent assembly or processing steps. In this embodiment, no additional complex driving or positioning mechanism is required. Based on the cooperation between the shaft limiting component 2 and the trunnion 34, the rotor can be stably rotated and positioned by gravity, which simplifies the operation process of hoisting and rotating the gas turbine rotor, and reduces the errors and safety hazards caused by manual intervention.

[0075] Furthermore, during the rotor's rotation process aided by the eccentric trunnion and gravity, the shaft limiting assembly 2 can restrict the rotation range of the trunnion 34 through a specific trunnion groove structure, preventing the rotor's rotation angle from being too large or too small. This specific trunnion groove structure is an offset structure adapted to the eccentric trunnion, and the trunnion groove is correspondingly set as an eccentric arc-shaped structure. This eccentric arc-shaped structure can adapt to the trajectory offset of the eccentric trunnion during rotation, limiting the rotation angle while preventing jamming between the eccentric trunnion and the groove. When the rotor rotates to the target horizontal state, it can also help lock the position of the trunnion 34, preventing the rotor from rotating additionally due to gravity or external forces, ensuring that the front journal can be accurately aligned and fall on the front limiting rotary support plate 5.

[0076] In an alternative embodiment, see Figure 4 The pivot limiting assembly 2 includes:

[0077] Support 21 is fixed on the first bracket 11 or the second bracket 12; support 21 is provided with a trunnion groove; support 21 is the basic bearing component of the rotating shaft limiting assembly 2, providing a stable installation reference for the rotating shaft limiting assembly 2. The trunnion groove on support 21 is a mounting position for the trunnion 34 of the adapter plate 3, used to accommodate the trunnion 34 and limit its displacement outside the circumferential direction.

[0078] A cover plate 22, fixed to a support 21, limits the radial displacement of the trunnion 34 after it is inserted into the trunnion groove. One side of the cover plate 22 is hinged to the support 21, and the other side is fixed to the support 21. The cover plate 22 is installed on the support 21 by hinge on one side and fixed on the other. After the trunnion 34 is inserted into the trunnion groove, the cover plate 22 closes and is fixed. The cover plate 22 can directly limit the radial displacement of the trunnion 34, preventing the trunnion 34 from coming out of the trunnion groove. Optionally, the other side of the cover plate 22 is fixed to the support 21 by a hinge bolt. A certain amount of vibration will occur during the rotor's rotation, and the trunnion 34 will also experience slight force fluctuations when rotating. The movable structure of the hinge bolt has a certain degree of elasticity, which can buffer the impact force caused by vibration and fluctuation, and avoid stress concentration at the fixing point of the cover plate 22 and the support 21 due to rigid connection. This reduces the wear and deformation of components such as the cover plate 22 and the support 21, and extends the service life of the shaft limiting assembly 2. Moreover, the hinge bolt is easy and quick to install and disassemble without complicated tools. Compared with ordinary bolts, it can significantly shorten the process time, improve the overall efficiency of rotor processing and assembly, and is suitable for tooling components that require frequent disassembly and assembly.

[0079] In this embodiment, one side of the cover plate 22 is hinged to the support 21. The cover plate 22 can rotate along the hinge pin to complete the opening and closing action of the cover plate 22. A retaining ring and a cotter pin can be provided on the pin to prevent axial movement of the pin.

[0080] A handle 23 for moving the cover plate 22 is fixedly provided on the cover plate 22. The handle 23 is a convenient operating component provided on the cover plate 22, which is used to manually open or close the cover plate 22, thereby improving assembly efficiency.

[0081] In this embodiment, the cover plate 22 balances the reliability of its limiting function with the ease of operation. The hinged side allows the cover plate 22 to be flexibly flipped open, facilitating the insertion or removal of the trunnion 34; the fixed side ensures that the cover plate 22 remains secure during flipping, firmly locking the trunnion 34 in place. The cover plate 22 and the trunnion groove simultaneously restrict the radial displacement of the trunnion 34, ensuring that the trunnion 34 can rotate smoothly around its own axis (meeting the flipping requirements) while preventing it from shifting or falling off during rotation or under stress, thus guaranteeing coaxiality and flipping stability. The cover plate 22 can be opened and closed manually using the handle 23, reducing operational difficulty and improving the overall efficiency of rotor processing and assembly, thereby enhancing overall process efficiency.

[0082] In an optional embodiment, the limiting rotary support plate 5 is fixedly mounted on the third bracket 13; when the rotor rotates at a preset angle, the front journal of the rotor is embedded in the limiting rotary support plate 5.

[0083] In this embodiment, the limiting rotary support plate 5 serves as a support component for the rotor's front journal, bearing the weight of the rotor's front end when flipped to a horizontal position. Together with the two trunnions 34 of the adapter plate 3, it forms three support points, preventing the rotor from wobbling or tilting in a horizontal state and maintaining overall rotor stability. Precise installation of the limiting rotary support plate 5 ensures that the front journal rests on it after the rotor is flipped. The precise positioning of the limiting rotary support plate 5 reduces the time spent manually adjusting the rotor's position, adapts to the angle requirements of subsequent processes, and eliminates the need for repeated disassembly and reassembly, making the assembly and processing flow smoother.

[0084] In an alternative embodiment, see Figure 5 The limit slewing pallet 5 includes:

[0085] The support base includes two support members 51; the two support members 51 (which can be fixed to the third bracket 13 by bolts) are provided with trunnion holes 34 on each support member 51. The support base is a supporting component for the tray 52. ​​The trunnion holes 34 on the support members 51 are adapted to the tray trunnion 53, providing a rotatable mounting reference for the tray 52 and ensuring that the tray 52 can rotate flexibly around the trunnion holes 34.

[0086] The support plate 52 has support plate trunnions 53 at both ends, with the rotation axes of the two support plate trunnions 53 completely overlapping. The support plate trunnions 53 are used to be installed in the trunnion 34 holes. The support plate 52 has a groove for accommodating the front journal of the rotor. The support plate trunnions 53 at both ends are embedded in the trunnion 34 holes of the support member 51 to realize the rotation function of the support plate 52. The groove on the support plate 52 is used to support the front journal. The groove conforms to the shape of the front journal, which can limit the radial movement of the front journal and support the weight of the front journal.

[0087] The pressure cap 54, fixed on the support plate 52, is used to limit the radial displacement of the rotor's front journal after it is embedded in the groove. After the front journal is embedded in the groove, the pressure cap 54 presses the front journal from above, directly restricting its upward radial displacement and preventing the front journal from coming out of the groove.

[0088] The axial limiting clamp 55 is used to fix the rotor's front journal and to limit the axial displacement of the rotor's front journal after it is embedded in the groove. The axial limiting clamp 55, fixed to the rotor's front journal, forms a stepped shaft; that is, after the axial limiting clamp 55 and the rotor's front journal are tightened, the two combine to form a composite structure with a stepped diameter change. After the front journal is embedded in the groove, the axial displacement of the front journal (movement along the axis of the front journal) is further constrained, preventing the front journal from moving back and forth on the support plate 52.

[0089] Protective pads are provided on the contact surfaces of the support plate 52, the pressure cap 54, and the front journal of the rotor. These protective pads buffer vibrations, reduce metal-to-metal friction, and protect the surface precision of the front journal and the contact areas of the support plate 52 and the pressure cap 54, preventing wear or deformation from impacts. Furthermore, the protective pads are made of polyurethane. Polyurethane has good elasticity and toughness, effectively absorbing the vibrations and impacts generated by rotor rotation, preventing impacts or stress concentration between the front journal and the support plate 52 and the pressure cap 54 due to hard contact. Moreover, the surface of polyurethane is flexible and has a moderate coefficient of friction, preventing the front journal from jamming due to excessive friction and avoiding scratches and wear caused by direct contact between metal parts, thus maximizing the protection of the surface precision of the front journal. Polyurethane has good oil resistance, aging resistance, and resistance to compression deformation, making it adaptable to industrial environments and maintaining its protective performance over long-term use without frequent replacement.

[0090] In this embodiment, the support plate 52 forms a rotatable connection structure by engaging with the trunnion 34 holes of the support base via trunnion 34 at both ends. This allows the support plate 52 to rotate within a small range around the trunnion 34 holes, accommodating minor angle adjustments required in subsequent rotor processes and preventing jamming caused by rigid connections. The groove on the support plate 52 restricts the radial displacement of the front journal, and the pressure cap 54 further locks the upward radial movement of the front journal, ensuring the front journal is completely fixed in a horizontal position. The axial limiting clamp 55 specifically restricts the axial displacement of the front journal, working in conjunction with the radial limiting clamp to achieve omnidirectional positioning of the front journal on the support plate 52, preventing loosening or displacement in any direction. This dual radial and axial limiting reduces safety hazards caused by operational errors, and the support plate 52's ability to rotate within a small range around the trunnion 34 holes adapts to minor angle adjustments in subsequent processes, improving overall work efficiency. The groove fits the shape of the front journal, which can distribute the force on the front journal and avoid local pressure concentration. Furthermore, the protective pad prevents hard contact between the front journal and the support plate 52 and the pressure cover 54, reduces damage caused by vibration and impact, increases buffering and anti-wear protection, and protects the surface accuracy of the front journal and the life of the equipment.

[0091] In an optional embodiment, a slider self-locking device is provided at the bottom of the third bracket 13; the slider self-locking device is used to adjust the distance between the limiting rotary support plate 5 and the rotating shaft limiting component 2 according to the rotor length.

[0092] In this embodiment, the third bracket 13 is the supporting component of the limiting rotary support plate 5, providing a stable installation reference for the limiting rotary support plate 5. The third bracket 13, together with the first bracket 11 and the second bracket 12, achieves multi-point support for the rotor. To adapt to rotors of different lengths, it is necessary to adjust the distance between the third bracket 13 and the first bracket 11 and the second bracket 12, that is, to adjust the distance between the limiting rotary support plate 5 and the shaft limiting component 2. By setting a slider self-locking device at the bottom of the third bracket 13, the slider self-locking device can drive the third bracket 13 to slide as a whole, thereby adjusting the position of the upper limiting rotary support plate 5 and changing its distance from the shaft limiting component 2. The slider self-locking device can adapt to rotors of various lengths, quickly adapting to the adjustment needs of rotors of different lengths and reducing auxiliary operation time. This significantly improves the versatility and applicability of the rotor turning equipment and reduces the cost of customizing exclusive brackets for different rotors.

[0093] In this embodiment, the slider self-locking device includes a guide rail and a slider, with the slider mounted on the guide rail. One side of the slider has a downward-pointing sidewall with a threaded hole. The end of a locking bolt is screwed into the threaded hole and faces the side of the guide rail; a wear-resistant pressure block is provided at the end of the locking bolt.

[0094] When the locking bolt is tightened, the axial force of the locking bolt is converted into the normal force between the wear-resistant pressure block and the contact surface of the guide rail (the greater the normal force, the greater the static friction). When the static friction is greater than the lateral force on the slider along the guide rail direction, the slider is "locked"; when the locking bolt is loosened, the normal force disappears, the friction is released, and the slider can slide along the guide rail.

[0095] When the spacing needs to be adjusted, loosen the locking bolts to allow the slider to slide freely along the guide rail. The operator can push the slider to move the limit rotary support plate 5 along the preset guide rail. Since different rotor lengths require different spacings, the spacing can be flexibly changed through the linear displacement of the slider on the guide rail, thus adapting to compressor rotors of different specifications (short, medium, and long). After the third support 13 is adjusted to the target position, retighten the locking bolts. This prevents vibration and impact caused by rotor rotation during operation, which could lead to component displacement and ensure a fixed spacing. Furthermore, the stability can be further enhanced by secondary tightening of the bolts between the slider and the guide rail.

[0096] Based on any of the above embodiments of the rotor reversing device, see Figure 6 The rotor flipping device also includes: a paving plate 6 and multiple adjustable support legs 7.

[0097] The first support 11, the second support 12, and the third support 13 are all mounted on the mounting plate 6. The mounting plate 6 integrates the three dispersed supports into a single unit, forming a stable load-bearing base and preventing positional deviations that can occur when individual supports are installed independently. Simultaneously, the mounting plate 6 distributes the rotor weight transmitted by each support, reducing localized pressure on the ground or foundation platform and protecting the mounting surface. Multiple adjustable feet 7 are provided at the bottom of the mounting plate 6. Each adjustable foot 7 can be bolted to the bottom of the mounting plate 6. Each adjustable foot 7 can be independently adjusted in height. By adjusting the extension length of different adjustable feet 7, the levelness of the mounting plate 6 can be precisely calibrated, thereby ensuring that all supports and limiting components above are on the same horizontal reference plane.

[0098] In this embodiment, the mounting plate 6 keeps the installation positions of the three supports relatively fixed, preventing the relative positional deviation between the limiting rotary support plate 5 and the rotating shaft limiting assembly 2 due to the displacement of a single support, thus ensuring the positioning accuracy of the rotor's front and rear support points. This reduces the impact of rotor rotation and vibrations generated during process operations on the support connection, extending the equipment's service life. The mounting plate 6 can also be aligned with a horizontal base surface via adjustable support feet 7, preventing uneven force distribution and attitude deviation of the rotor due to tilted mounting surfaces.

[0099] The ground or foundation platform at the industrial site may be uneven. The independent adjustment function of the adjustable support leg 7 can flexibly compensate for height deviations caused by ground settlement, component wear, etc. The adjustable support leg 7 can offset ground errors through height compensation, eliminating the need for complex leveling treatment of the installation surface, ensuring the horizontal accuracy and support stability of the device, and reducing the threshold for on-site installation.

[0100] It should be noted that in some embodiments, the platform 6 and adjustable legs 7 can be leveled first, and then the three supports can be installed uniformly. This eliminates the need to adjust the level of each support individually, significantly shortening the equipment installation and debugging time. If overall leveling is required, only the adjustable legs 7 need to be operated, without altering the fixing structure between the supports and the platform 6, thus improving work efficiency.

[0101] The rotor reversing device provided in this application embodiment can perform multi-degree-of-freedom reversing of the compressor rotor. Compared with the general reversing method, it reduces one lifting point, weakens the requirements for the operator's skill level, reduces the possibility of risks during the rotor reversing process, and achieves reliable and safe multi-degree-of-freedom reversing of the compressor rotor. This improves reversing efficiency and safety, and enhances the stability of the compressor rotor's multi-degree-of-freedom, multi-angle reversing.

[0102] The following describes the compressor rotor rotation process using the aforementioned rotor rotation device, specifically including the following:

[0103] I. The method for adjusting the degrees of freedom of the rotor reversing device provided in this application:

[0104] By adjusting the relative position of the large end of the compressor rotor mounting side and the fixed position of the adapter plate, the angular position of the compressor rotor along the circumferential direction of the axis can be adjusted during the rotation process, so as to achieve the setting of a specific orientation after the rotor is rotated and realize the adjustment of the degree of freedom.

[0105] II. The method for rotating the rotor provided in this application:

[0106] The compressor rotor, from the vertical position (0° position in this application) with the small end of the journal facing upwards and the large end facing downwards (the 4th to 17th stage drums), is rotated to the horizontal position (90° position in this application) with the small end of the journal facing right and the large end facing left. This process involves four steps:

[0107] 1. Install an adapter lifting ring on the end face of the compressor rotor's front journal. Position the mounting stop of the 17th stage drum end face of the compressor rotor vertically onto the adapter plate. Adjust the relative position of the mounting stop and the adapter plate according to the required angle of the drum end face to achieve free adjustment of the drum end face's rotation angle. Use the pressure plate on the adapter plate to press the mounting stop of the 17th stage drum end face of the rotor, fixing it to the adapter plate.

[0108] 2. The compressor rotor is hoisted and fixed to the transfer plate, and the trunnions at both ends of the transfer plate are fixed in the two shaft limiting assemblies.

[0109] 3. Adjust the crane. Based on the eccentric structure of the two trunnions of the adapter plate, and using gravity, the trunnions at both ends of the adapter plate rotate with the shaft limiting assembly as the fulcrum, flipping the compressor rotor to a horizontal state, and placing the front journal on the limiting rotary support plate.

[0110] 4. Hoist the compressor rotor, transfer ring, and transfer plate onto the rotor horizontal support, remove the transfer ring and transfer plate, and complete the rotation of the compressor rotor from 0° position to 90° position. The rotor horizontal support is a special tooling support used to support and horizontally position the compressor rotor during the rotation operation.

[0111] Third, rotate the compressor rotor from its horizontal position (90° in this application) with the small end of the journal facing right and the large end facing left (the small end of the journal facing down and the large end facing up) to its vertical position (180° in this application). This process involves four steps:

[0112] 1. Place the compressor rotor on the horizontal support of the compressor rotor. Install the adapter lifting ring on the end face of the front journal. Install the mounting plate on the end face of the 17th stage drum of the compressor rotor. Adjust the relative position of the mounting plate on the end face of the 17th stage drum of the compressor rotor so that it falls vertically onto the adapter plate according to the required angle direction of the drum end face, thus achieving degree of freedom adjustment. Use the pressure plate on the adapter plate to press the mounting plate on the end face of the 17th stage drum of the rotor and fix it on the adapter plate. Install the axial limit clamp on the rotor journal at the rear end of the limit rotary support plate.

[0113] 2. Lift the rotor from the transfer ring and transfer plate to the support platform, and place the front journal on the limiting rotary support plate. At this time, the end face of the axial limiting clamp is in contact with the rear end face of the support plate to achieve axial limiting. Install the pressure cover on the support plate to achieve radial limiting.

[0114] 3. Lift the compressor rotor by using the lifting ring on the transfer plate as the lifting point. The two trunnions on the pallet plate rotate around the trunnion holes on the support base. The compressor rotor is axially and radially limited by the axial limit clamp and the pressure cap to prevent the rotor from moving during the flipping process, thus completing the flipping of the compressor rotor from 90° to 180°.

[0115] As can be seen from the above description, the rotor reversing device provided in this application reduces the requirements for site height, simplifies the reversing steps, reduces the requirements for the operator's operating ability, reduces the possibility of risks arising during the rotor reversing process, controls the scope of possible risks, has a certain control capability over potential risks, and realizes reliable and safe multi-degree-of-freedom reversing operation of heavy-duty gas turbine compressor rotors.

[0116] Using the rotor tilting device provided in this application, the gas turbine compressor rotor can be tilted in multiple degrees of freedom (0°, 90°, 180°). Compared with the general tilting method, it reduces one lifting point, simplifies operation, increases tilting efficiency, lowers manufacturing costs, and enhances safety, thereby improving the stability of multi-degree-of-freedom, multi-angle tilting of heavy-duty gas turbine compressor rotors. Furthermore, the rotor tilting device provided in this application saves tilting space and is movable, eliminating the need for ground fixing. Conventional ground-fixed tilting schemes require a site clearance of at least twice the rotor length for tilting from 0° to 180°. This device significantly reduces this limitation, making it suitable for rotors with large diameters and long lengths. The mobility of this structure also allows for use in multiple plant areas and workstations.

[0117] Although the above disclosure is provided, the scope of protection of this application is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this application, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A rotor reversing device, applied to a gas turbine, characterized in that, include: A support platform for supporting the rotor of a gas turbine includes: a first bracket, a second bracket, and a third bracket; Two pivot limiting components are fixed on the first bracket and the second bracket respectively, and are used to connect the trunnion on the adapter plate; An adapter plate is used to fix the rear journal of the rotor; the adapter plate is provided with two trunnions; the two trunnions are respectively used to be embedded in the two shaft limiting assemblies; Adapter eyelet for securing the front journal of the rotor; A limiting rotary support plate is fixedly mounted on the third bracket; when the rotor rotates at a preset angle, the front journal of the rotor is embedded in the limiting rotary support plate.

2. The rotor reversing device according to claim 1, characterized in that, The adapter lifting ring includes: a flange and a lifting ring; The flange and the lifting ring are fixedly connected; the flange is also used to fixally connect to the front journal of the rotor.

3. The rotor reversing device according to claim 2, characterized in that, The adapter ring also includes: an auxiliary support shaft; The auxiliary support shaft is fixedly connected to the flange, and the auxiliary support shaft is used to insert into the hollow shaft of the rotor front journal.

4. The rotor reversing device according to claim 1, characterized in that, The adapter plate includes: A flat plate for supporting the rear journal of the rotor; A pad is provided on the flat plate; A pressure plate is used to press the drum end face on the rear journal of the rotor onto the pad; The trunnion is fixedly connected to the plate. Buffer strips are provided between the pressure plate and the end face of the drum, and between the pad and the end face of the drum.

5. The rotor reversing device according to claim 4, characterized in that, The adapter plate also includes: at least two lifting rings; At least two of the lifting rings are fixedly connected to the plate, and the lifting rings are used in conjunction with the adapter lifting ring to lift the rotor of the gas turbine.

6. The rotor reversing device according to claim 1, characterized in that, The pivot limiting assembly includes: A support, which is fixed to the first bracket or the second bracket; the support is provided with a trunnion groove; A cover plate, fixed to the support, is used to limit the radial displacement of the trunnion after the trunnion is embedded in the trunnion groove.

7. The rotor reversing device according to claim 6, characterized in that, One side of the cover plate is hinged to the support, and the other side of the cover plate is fixed to the support; A handle for moving the cover plate is fixedly provided on the cover plate.

8. The rotor reversing device according to claim 1, characterized in that, The limiting rotary support plate includes: The support base includes two support members; the two support members are fixed on the third bracket, and each support member is provided with a trunnion hole; The support plate has support plate trunnions at both ends; the support plate trunnions are located in the trunnion holes; the support plate has a groove for accommodating the front journal of the rotor; A pressure cap, fixed on the support plate, is used to limit the radial displacement of the front journal of the rotor after the front journal of the rotor is embedded in the groove; An axial limiting clamp is used to fix the front journal of the rotor and to limit the axial displacement of the front journal of the rotor after it is embedded in the groove.

9. The rotor reversing device according to claim 8, characterized in that, Protective pads are provided on the contact surfaces of the support plate, the pressure cover, and the front journal of the rotor.

10. The rotor reversing device according to claim 1, characterized in that, The bottom of the third bracket is equipped with a slider self-locking device; The slider self-locking device is used to adjust the distance between the limiting rotary support plate and the rotating shaft limiting assembly according to the rotor length.

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