Gas turbine rotor pull rod automatic control system and installation method and control method thereof

Abstract

The invention discloses a gas turbine rotor pull rod automatic control system and an installation method and a control method thereof, the gas turbine rotor pull rod automatic control system comprises a wheel disc (1), a center pull rod (2), a rotating neck bearing (3), an air cylinder (4), a sensing device (5) and a hydraulic device (6), and the sensing device (5) and the hydraulic device (6) are connected in a wired or wireless mode to achieve information transmission; the sensing device (5) is arranged at a gap between the wheel disc (1) and the central pull rod (2), and part of the hydraulic device (6) is arranged in the central pull rod (2); sensing parameters are collected according to the sensing device (5), the sensing parameters are transmitted into the hydraulic device (6) to obtain correction parameters, and the hydraulic device (6) regulates and controls hydraulic oil (7) according to the correction parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine manufacturing, and in particular to a gas turbine rotor pull rod automatic control system and an installation method and a control method thereof. Background Art

[0002] As the core component of a gas turbine, the rotor provides power to the compressor and carries the power output of the turbine during high-speed rotation, and transmits torque between the two. The rotor is composed of a series of rotor discs that are axially stacked and connected. Based on different connection methods, the current mainstream rotor types can be divided into distributed tie rod rotors, center tie rod rotors, and welded rotors. The center tie rod rotor consists of a large tie rod located at the center of the turbine rotor axis that connects all the rotor discs, and all the discs are tightened and fixed with preload through the threads at the center of the front shaft head and the tie rod nut at the end of the turbine.

[0003] For the center-tie rod rotor, during the start-up and shutdown of the gas turbine, all components of the rotor (wheel, tie rod, tie rod nut, etc.) will be subjected to thermal and mechanical loads (such as centrifugal force, aerodynamic force caused by blades, etc.) that change dramatically over time, and the tie rod nut cannot be adjusted after assembly and tightening, which will inevitably cause the tie rod tightening force to change greatly during the start-up and shutdown of the gas turbine.

[0004] Such changes often have a number of adverse effects on the operational stability and structural strength of the rotor. For example, the contact force between the wheels may be too large or too small during operation, causing the wheel contact position to fail or fail to maintain a stable contact state, while reducing or destroying the torque transmission and bending resistance between the wheels, resulting in severe vibration or other operational accidents. For example, the stress of the mating threads of the tie rod and the tie rod nut may be instantaneously too large, causing thread failure and even the risk of rotor disintegration. The range of stress changes during the start-stop process will also be too large, greatly reducing the fatigue life of the tie rod, mating threads, and other rotor components. In addition, excessive changes in the tie rod tightening force will also cause significant changes in the rotor stiffness, greatly reducing the design range of the rotor dynamics. At the same time, excessive fluctuations in the tie rod tightening force during operation will also place high requirements on material strength, making it difficult to effectively reduce material costs.

[0005] Patent document CN117451369A discloses a heavy-duty gas turbine rod rotor experimental device, comprising a compressor assembly, a multi-stage turbine, a drive member and a sensor assembly. The output end of the compressor assembly is connected to the input end of the multi-stage turbine to input compressed air of different temperatures into the multi-stage turbine. The multi-stage turbine comprises a housing and a rod rotor assembly rotatably disposed in the housing. The drive member is connected to the rod rotor assembly to drive the rod rotor assembly to rotate. The sensor assembly is disposed on the multi-stage turbine. The sensor assembly is used to detect the temperature, stress and vibration intensity of the rod rotor assembly. However, the problems of unstable wheel contact force, excessive thread stress, reduced component fatigue life, limited dynamic design range and increased material cost caused by significant changes in the rod tightening force of the center rod rotor during the start-up and shutdown of the gas turbine are not solved.

[0006] Patent document CN109209641B discloses a connection structure for an engine rotor assembly, wherein the engine is a gas turbine or a turbojet engine, and the rotor assembly includes at least two stages of compressor rotors and at least one stage of turbine rotor coaxially arranged in sequence along the engine axis, including the inner ring of the deep groove ball bearing arranged on the forward shaft neck of the first-stage compressor rotor disc, and the outer ring arranged on the main load-bearing casing of the engine; the front end of the forward shaft neck of the first-stage compressor rotor disc is provided with an external thread I, and the external thread I is provided with a front nut and a nut lock plate I for preventing the front nut from loosening; the problems of unstable disc contact force, excessive thread stress, reduced component fatigue life, limited dynamic design range and increased material cost caused by significant changes in the tie rod tightening force of the center tie rod rotor during the start-up and shutdown operation of the gas turbine are not solved.

[0007] In summary, the above two existing patents do not solve the problems of unstable wheel contact force, excessive thread stress, reduced component fatigue life, limited dynamic design range and increased material cost caused by significant changes in the tie rod tightening force during the start-up and shutdown operation of the gas turbine. Summary of the Invention

[0008] Based on the above technical problems, the present invention proposes a gas turbine rotor tie rod automatic control system and its installation method and control method to solve the problems of unstable wheel contact force, excessive thread stress, reduced component fatigue life, limited dynamic design range and increased material cost caused by significant changes in the tie rod tightening force of the center tie rod rotor during the start-up and shutdown operation of the gas turbine.

[0009] To achieve the above-mentioned object, the present invention proposes a gas turbine rotor tie rod automatic control system.

[0010] A gas turbine rotor tie rod automatic control system has a wheel disc, a center tie rod rotor, a slewing neck bearing and a cylinder, and is characterized in that it includes a sensing device and a hydraulic device, and the sensing device is connected to the hydraulic device by wired or wireless means to realize information transmission; the sensing device is arranged in the gap between the wheel disc and the center tie rod rotor, and part of the hydraulic device is arranged inside the center tie rod rotor for controlling the axial force of the center tie rod rotor.

[0011] Furthermore, the hydraulic device includes a pipeline, a hydraulic cylinder and a control unit. The hydraulic cylinder is an annular structure and is arranged inside the center rod rotor. The control unit is arranged at the end of the center rod rotor. The hydraulic cylinder and the control unit are fluidically connected through the pipeline.

[0012] Furthermore, the control unit includes a calculation and power control module and a hydraulic control module. The hydraulic control module is arranged at the end of the center pull rod rotor, and the calculation and power control module is adjacent to one side of the hydraulic control module for controlling the operating state of the hydraulic control module.

[0013] Furthermore, the hydraulic control module includes a wire hole, an electrostrictive module, a radial displacement module, a radial piston and a housing. The wire hole is arranged at the geometric center of the hydraulic control module along the axial direction of the hydraulic control module. The electrostrictive module, the radial displacement module and the radial piston are uniformly distributed circumferentially on a cross section perpendicular to the axial direction of the hydraulic control module. The wire hole, the electrostrictive module, the radial displacement module and the radial piston are arranged inside the housing.

[0014] Furthermore, the hydraulic control module also includes a fitting portion, which is arranged inside the box shell. The fitting portion and the radial piston are fittable and are used to fasten the radial piston.

[0015] Furthermore, the number of the radial displacement modules is 4-8; the number of the radial pistons is 4-8.

[0016] Furthermore, it also includes hydraulic oil, which is filled in the cavity formed between the fitting part and the box shell and the inside of the hydraulic cylinder, and forms a hydraulic system through the pipeline.

[0017] Furthermore, the hydraulic device includes a wire, which is arranged along the wire hole and the pipeline, and is used to connect the electrostrictive module, the radial displacement module and the sensor device to the calculation and power control module.

[0018] Furthermore, the hydraulic device also includes a signal transmitter, which is arranged outside the calculation and power control module and at a corresponding position of the cylinder.

[0019] Furthermore, it also includes a pad, which is an annular structure and is adjacent to the hydraulic cylinder, the wheel disc and the center tie rod rotor; the pad is fixed to the wheel disc by bolts.

[0020] Furthermore, the center tie rod rotor includes an annular groove, and the annular groove, the pad and the hydraulic cylinder are interlocked, and the pad and the hydraulic cylinder are arranged in the annular groove.

[0021] Furthermore, the center rod rotor includes a plurality of transmission holes, which are arranged axially along the center rod rotor for connecting the wheel disc and the hydraulic device and arranging the wires, and some of the transmission holes are connected to the pipeline.

[0022] Furthermore, the sensing device includes a temperature sensor and a strain sensor.

[0023] To achieve the above object, the present invention further provides a method for installing a gas turbine rotor tie rod automatic control system, using the gas turbine rotor tie rod automatic control system described above, comprising the following steps:

[0024] The sensing device is arranged at the gap between the center rod rotor and the wheel disc, and the hydraulic device is embedded in the center rod rotor and fastened by bolts;

[0025] Place the center pull rod rotor vertically, hold up the sensor device and point it downwards, install the wheel disc and the slewing neck bearing in sequence and tighten them.

[0026] Furthermore, the sensing device is arranged at the gap between the central pull rod rotor and the wheel disc, comprising:

[0027] The wires are passed through the transmission holes and pipelines and gathered into a bus at the entrance of the wire holes to connect the computing and power control modules.

[0028] Furthermore, the hydraulic device is embedded in the central tie rod rotor and fastened by bolts, comprising:

[0029] The pad and the hydraulic cylinder are embedded in the annular groove, and the wires are connected to the radial displacement module and the calculation and power control module.

[0030] To achieve the above object, the present invention further provides a control method for a gas turbine rotor tie rod automatic control system, using the gas turbine rotor tie rod automatic control system described above, comprising the following steps:

[0031] The sensing parameters are collected by the sensing device, and the sensing parameters are transmitted to the hydraulic device to obtain correction parameters. The hydraulic device regulates the hydraulic oil according to the correction parameters.

[0032] Furthermore, the sensing parameters are input into the hydraulic device to obtain correction parameters, including:

[0033] The sensing parameters include temperature and axial force;

[0034] The sensing parameters are transmitted to the calculation and power control module through the wire to obtain the correction parameters.

[0035] Furthermore, the hydraulic device regulates the hydraulic oil according to the correction parameter, including:

[0036] The electrostrictive module and the radial displacement module are controlled to move radially according to the correction parameters, so that the radial position of the radial piston is changed, thereby pressing the hydraulic oil into the hydraulic cylinder.

[0037] Furthermore, it also includes:

[0038] The data processed by the calculation and power control module and the sensing parameters collected by the sensing device are uploaded to a remote computer terminal through a signal transmitter.

[0039] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0040] 1. The present invention proposes a gas turbine rotor tie rod automatic control system and its installation method and control method, which replaces the traditional tie rod and tie rod nut assembly structure with a hydraulic device, and at the same time sets a sensor device in the middle of the center tie rod rotor to work together to control the axial force of the center tie rod rotor, eliminating the strength problems and design risks brought by the traditional threaded structure, and significantly reducing the structural complexity and assembly difficulty; at the same time, the hydraulic device is used to achieve the adjustability of the tie rod axial force, solving the problem of non-adjustable axial force in traditional design; real-time monitoring and feedback control are carried out through the sensor device to ensure that the tie rod tightening force remains stable during the start-up and shutdown process of the gas turbine, greatly improving the operating stability and fatigue life of the rotor, and expanding the flexibility and performance potential of the rotor design.

[0041] 2. The present invention proposes a gas turbine rotor tie rod automatic control system and its installation and control methods. By calculating the data transmission value obtained by the sensor device and the power control module, the hydraulic control module is driven to adjust the axial force of the center tie rod rotor. The present invention can perform real-time regulation based on the instantaneous tightening state of the gas turbine operation without manual intervention, and has efficient, stable, and accurate regulation capabilities. By using temperature sensors and strain sensors to monitor the stress changes of the tie rod in real time, and combining an electrostrictive module and a radial displacement module to control the state of the hydraulic oil, the rotor is ensured to maintain optimal condition under different operating conditions. This automated control method not only improves the reliability and operating efficiency of the system, but also significantly reduces operation and maintenance costs.

[0042] 3. This invention proposes a gas turbine rotor tie rod automatic control system and its installation and control methods. This system utilizes a hydraulic device to achieve stable control of the axial force of the center tie rod rotor, reducing the strength requirements of the rotor material and enabling the use of more economical materials, thereby significantly reducing the R&D and manufacturing costs of the gas turbine. Furthermore, the automatic tightening force control system of this invention is not only applicable to existing gas turbine rotor structures but can also be applied to other types of rotor systems through simple adjustments and optimizations, demonstrating excellent scalability and versatility. This design not only enhances the system's flexibility but also facilitates future improvements and optimizations. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 A cross-sectional view of a gas turbine rotor tie rod automatic control system according to one embodiment is shown;

[0045] Figure 2 A cross-sectional view of a hydraulic device according to one embodiment is shown;

[0046] Figure 3 A cross-sectional view of a hydraulic device according to one embodiment is shown;

[0047] Figure 4 A cross-sectional view of a center-tied rod rotor is shown in one embodiment.

[0048] The above drawings include the following reference numerals:

[0049] 1. Wheel disc; 2. Center tie rod rotor; 3. Swing neck bearing; 4. Cylinder; 5. Sensor device; 6. Hydraulic device; 7. Hydraulic oil; 8. Spacer;

[0050] 21. Ring groove; 22. Transmission hole;

[0051] 51. Temperature sensor; 52. Strain sensor;

[0052] 60. Pipeline; 61. Hydraulic cylinder; 62. Control unit; 63. Wire; 64. Signal transmitter;

[0053] 621. Computing and power control module; 622. Hydraulic control module;

[0054] 6221. Wire hole; 6222. Electrostrictive module; 6223. Radial displacement module; 6224. Radial piston; 6225. Box shell; 6226. Fitting portion. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] The present invention is described in further detail below with reference to specific embodiments. These embodiments are not to be construed as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for ease of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as limiting the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance.

[0057] In this description, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0058] Example

[0059] The present invention proposes a gas turbine rotor tie rod automatic control system such as Figure 1 As shown in , it has a wheel disc 1, a center rod rotor 2, a slewing neck bearing 3 and a cylinder 4, and is characterized in that it includes a sensing device 5 and a hydraulic device 6, and the sensing device 5 is connected to the hydraulic device 6 by a wired or wireless manner to realize information transmission; the sensing device 5 is arranged at the gap between the wheel disc 1 and the center rod rotor 2, and part of the hydraulic device 6 is arranged inside the center rod rotor 2 for controlling the axial force of the center rod rotor 2.

[0060] In the present invention, "fluidic communication" refers to connecting different containers or devices through pipes, pipelines, etc., so as to realize the transmission and distribution of fluids such as gases or liquids; in such a communication system, fluids such as gases or liquids can flow from one container to another or from one device to another under the action of pressure difference.

[0061] In the present invention, "interlockable setting" means that two or more mechanical components can be docked together through a specific interface or joint surface design to form a complete structure or system. This setting requires that the interface or joint surface shape, size and locking mechanism between the components match.

[0062] Furthermore, if Figure 1 As shown in FIG, a plurality of sensor devices 5 are provided on the central rod rotor 2.

[0063] Furthermore, if Figure 2 As shown in the figure, the hydraulic device 6 includes a pipeline 60, a hydraulic cylinder 61 and a control unit 62, wherein the pipeline 60 and the hydraulic cylinder 61 are arranged inside the center rod rotor 2, and the control unit 62 is arranged at one end of the center rod rotor 2. The hydraulic cylinder 61 and the control unit 62 are fluidically connected through the pipeline 60; the hydraulic cylinder 61 is an annular structure and is arranged inside the center rod rotor 2 along the circumference thereof, and the control unit 62 is arranged at the end of the center rod rotor 2.

[0064] Furthermore, the hydraulic device 6 also includes a wire 63 and a signal transmitter 64. The wire 63 is arranged along the wire hole 6221 and the pipeline 60; the signal transmitter 64 is arranged outside the calculation and power control module 621 and at a corresponding position of the cylinder 4.

[0065] Furthermore, the control unit 62 includes a calculation and power supply control module 621 and a hydraulic control module 622. Figure 2 As shown in the figure, the hydraulic control module 622 is arranged at the end of the center rod rotor 2 , and the computing and power control module 621 is adjacent to one side of the hydraulic control module 622 and is connected to the hydraulic control module 622 via a wire 63 .

[0066] Furthermore, if Figure 2 As shown in , the hydraulic control module 622 includes a wire hole 6221, an electrostrictive module 6222, a radial displacement module 6223, a radial piston 6224, and a housing 6225. In this embodiment, the hydraulic control module 622 has a circular structure. The wire hole 6221 is located at the geometric center of the hydraulic control module 622 along the axial direction of the hydraulic control module 622 and penetrates two side surfaces of the hydraulic control module 622. Figure 3 for Figure 2 In the cross section of the line connecting the upper and lower BB positions, the electrostrictive module 6222, the radial displacement module 6223, and the radial piston 6224 are uniformly distributed circumferentially on the cross section perpendicular to the axial direction of the hydraulic control module 622; the wire hole 6221, the electrostrictive module 6222, the radial displacement module 6223, and the radial piston 6224 are arranged inside the box shell 6225.

[0067] Preferably, the number of radial displacement modules 6223 is 6; the number of radial pistons 6224 is 6. In other embodiments, the number of radial displacement modules 6223 and radial pistons 6224 can also be 4 or 8.

[0068] Furthermore, if Figure 2 The hydraulic control module 622 shown in the figure further includes a fitting portion 6226 , which is disposed inside the housing 6225 . The fitting portion 6226 and the radial piston 6224 are fittable to secure the radial piston 6224 .

[0069] Further, Figure 4 for Figure 2 The cross section of the line connecting the upper and lower AA positions includes 12 transmission holes 22, which are evenly arranged along the circumference of the center rod rotor 2. The directions of the 12 transmission holes 22 are all arranged along the axial direction of the center rod rotor 2, and four pipelines 60 and wires 63 share one transmission hole 22.

[0070] Furthermore, if Figure 2 As shown in the figure, the center tie rod rotor 2 includes an annular groove 21, and the gas turbine rotor tie rod automatic control system also includes a pad 8. The annular groove 21, the pad 8 and the hydraulic cylinder 61 are mutually interlocked, and the pad 8 and the hydraulic cylinder 61 are arranged in the annular groove 21; the pad 8 is an annular structure, adjacent to the hydraulic cylinder 61, the wheel disc 1 and the center tie rod rotor 2; the pad 8 is fixed to the wheel disc 1 by bolts.

[0071] Furthermore, the sensing device 5 includes a temperature sensor 51 and a strain sensor 52 .

[0072] To achieve the above object, the present invention further provides a method for installing a gas turbine rotor tie rod automatic control system, using the gas turbine rotor tie rod automatic control system described above, comprising the following steps:

[0073] The sensing device 5 is arranged at the gap between the center rod rotor 2 and the wheel disc 1, and the hydraulic device 6 is embedded in the center rod rotor 2 and fastened by bolts;

[0074] Place the central pull-rod rotor 2 vertically, lift the sensor device 5 and face it downward, then install the wheel disc 1 and the slewing neck bearing 3 in sequence and tighten them.

[0075] Furthermore, the sensor device 5 is arranged at the gap between the central pull-rod rotor 2 and the wheel disc 1, including:

[0076] The wires 63 are passed through the transmission hole 22 and the pipeline 60 and converged into a bus at the entrance of the wire hole 6221 to connect the computing and power control module 621 .

[0077] Furthermore, the hydraulic device 6 is embedded in the center tie rod rotor 2 and fastened by bolts, including:

[0078] The pad 8 and the hydraulic cylinder 61 are embedded in the annular groove 21 , and the wire 63 is connected to the radial displacement module 6223 and the calculation and power control module 621 .

[0079] To achieve the above object, the present invention further provides a control method for a gas turbine rotor tie rod automatic control system, using the gas turbine rotor tie rod automatic control system described above, comprising the following steps:

[0080] The sensing parameters are collected by the sensing device 5 and transmitted to the hydraulic device 6 to obtain correction parameters. The hydraulic device 6 regulates the hydraulic oil 7 according to the correction parameters.

[0081] Furthermore, the sensing parameters are input into the hydraulic device 6 to obtain correction parameters, including:

[0082] The sensing parameters include temperature and axial force;

[0083] The sensing parameters are transmitted to the calculation and power control module 621 through the wire 63 to obtain the correction parameters.

[0084] Furthermore, the correction parameters include voltage change values,

[0085] Specifically, when the combustion engine runs from a certain moment t to moment t+Δt, the axial force of the center rod rotor 2 is measured and converted by the sensor device 5 to increase from σ0 to σ0+Δσ, and the axial force change +Δσ is transmitted to the calculation and power control module 621 through the wire 63. A preset value Δε is set for the axial force change. If |+Δσ|>Δε, the calculation and power control module 621 calculates the voltage change value -ΔV of the axial force σ0 of the center rod rotor 2 back to moment t.

[0086] Furthermore, the hydraulic device 6 regulates the hydraulic oil 7 according to the correction parameter, including:

[0087] The electrostrictive module 6222 and the radial displacement module 6223 are controlled to move radially according to the correction parameters, so that the radial position of the radial piston 6224 is changed, thereby pressing the hydraulic oil 7 into the hydraulic cylinder 61.

[0088] Specifically, based on the voltage change value -ΔV calculated in the above steps, the electrostrictive module 6222 and the radial displacement module 6223 are controlled to generate a radial displacement of -ΔS. In this embodiment, the material of the electrostrictive module 6222 is processed according to radial polarization, and under the action of the left and right end surface electrodes, it can be uniformly expanded and contracted in the radial direction throughout the entire circle (strain of approximately 1%). At this time, the pressure change of the hydraulic oil 7 is -Δp, which pushes the hydraulic cylinder 61 to an axial displacement of -ΔL. At this time, the axial force is measured by the sensor device 5 as σ0′, which is continuously sent to the calculation and power control module 621. After the calculation and power control module 621 determines, if σ0-σ0 ′ <Δε, the power supply to the electrostrictive module 6222 and the radial displacement module 6223 is stopped, and the sensing parameters and correction parameters at this time are stored in the calculation and power control module 621.

[0089] Furthermore, the data processed and stored by the calculation and power control module 621 and the sensing parameters collected by the sensing device 5 are uploaded to a remote computer terminal via a signal transmitter 64 .

[0090] In summary, it can be seen from the above description that the above embodiments of the present invention achieve the following technical effects:

[0091] 1. The present invention proposes a gas turbine rotor tie rod automatic control system and its installation method and control method, which replaces the traditional tie rod and tie rod nut assembly structure with a hydraulic device, and at the same time sets a sensor device in the middle of the center tie rod rotor to work together to control the axial force of the center tie rod rotor, eliminating the strength problems and design risks brought by the traditional threaded structure, and significantly reducing the structural complexity and assembly difficulty; at the same time, the hydraulic device is used to achieve the adjustability of the tie rod axial force, solving the problem of non-adjustable axial force in traditional design; real-time monitoring and feedback control are carried out through the sensor device to ensure that the tie rod tightening force remains stable during the start-up and shutdown process of the gas turbine, greatly improving the operating stability and fatigue life of the rotor, and expanding the flexibility and performance potential of the rotor design.

[0092] 2. The present invention proposes a gas turbine rotor tie rod automatic control system and its installation and control methods. By calculating the data transmission value obtained by the sensor device and the power control module, the hydraulic control module is driven to adjust the axial force of the center tie rod rotor. The present invention can perform real-time regulation based on the instantaneous tightening state of the gas turbine operation without manual intervention, and has efficient, stable, and accurate regulation capabilities. By using temperature sensors and strain sensors to monitor the stress changes of the tie rod in real time, and combining an electrostrictive module and a radial displacement module to control the state of the hydraulic oil, the rotor is ensured to maintain optimal condition under different operating conditions. This automated control method not only improves the reliability and operating efficiency of the system, but also significantly reduces operation and maintenance costs.

[0093] 3. This invention proposes a gas turbine rotor tie rod automatic control system and its installation and control methods. This system utilizes a hydraulic device to achieve stable control of the axial force of the center tie rod rotor, reducing the strength requirements of the rotor material and enabling the use of more economical materials, thereby significantly reducing the R&D and manufacturing costs of the gas turbine. Furthermore, the automatic tightening force control system of this invention is not only applicable to existing gas turbine rotor structures but can also be applied to other types of rotor systems through simple adjustments and optimizations, demonstrating excellent scalability and versatility. This design not only enhances the system's flexibility but also facilitates future improvements and optimizations.

[0094] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0095] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0096] It should be noted that, in the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

Claims

1. A gas turbine rotor tie rod automatic control system, comprising a wheel disc (1), a center tie rod rotor (2), a slewing neck bearing (3) and a cylinder (4), characterized in that: The invention comprises a sensing device (5) and a hydraulic device (6), wherein the sensing device (5) and the hydraulic device (6) are connected to each other via a wired or wireless method to realize information transmission; the sensing device (5) is arranged at the gap between the wheel disc (1) and the center tie rod rotor (2), and a part of the hydraulic device (6) is arranged inside the center tie rod rotor (2) for controlling the axial force of the center tie rod rotor (2).

2. The system according to claim 1, characterized in that The hydraulic device (6) includes a pipeline (60), a hydraulic cylinder (61) and a control unit (62). The hydraulic cylinder (61) is an annular structure and is arranged inside the center rod rotor (2); the control unit (62) is arranged at the end of the center rod rotor (2); The hydraulic cylinder (61) and the control unit (62) are fluidically connected via a pipeline (60).

3. The system according to claim 2, characterized in that: The control unit (62) includes a calculation and power supply control module (621) and a hydraulic control module (622). The hydraulic control module (622) is arranged at the end of the center pull rod rotor (2), and the calculation and power control module (621) is adjacent to one side of the hydraulic control module (622) and is used to control the operating state of the hydraulic control module (622).

4. The system according to claim 3, characterized in that The hydraulic control module (622) includes a wire hole (6221), an electrostrictive module (6222), a radial displacement module (6223), a radial piston (6224) and a housing (6225). The wire hole (6221) is arranged at the geometric structure center of the hydraulic control module (622) along the axial direction of the hydraulic control module (622); the electrostrictive module (6222), the radial displacement module (6223) and the radial piston (6224) are uniformly distributed in the circumferential direction on a cross section perpendicular to the axial direction of the hydraulic control module (622); The wire hole (6221), the electrostrictive module (6222), the radial displacement module (6223) and the radial piston (6224) are arranged inside the box shell (6225).

5. The system according to claim 4, characterized in that: The hydraulic control module (622) further includes a fitting portion (6226), The interlocking portion (6226) is arranged inside the box shell (6225), and the interlocking portion (6226) and the radial piston (6224) are interlockingly arranged to fasten the radial piston (6224).

6. The system according to claim 4, characterized in that The number of the radial displacement modules (6223) is 4-8; The number of the radial pistons (6224) is 4 to 8.

7. The system according to claim 5, characterized in that Also includes hydraulic oil (7), The hydraulic oil (7) is filled in the cavity formed between the fitting portion (6226) and the housing (6225) and the interior of the hydraulic cylinder (61), and a hydraulic system is formed through the pipeline (60).

8. The system according to claim 4, characterized in that: The hydraulic device (6) includes a wire (63), The wire (63) is arranged along the wire hole (6221) and the pipeline (60) and is used to connect the electrostrictive module (6222), the radial displacement module (6223) and the sensor device (5) to the calculation and power control module (621).

9. The system according to claim 3, characterized in that: The hydraulic device (6) further includes a signal transmitter (64), The signal transmitter (64) is arranged outside the calculation and power control module (621) and at a corresponding position of the cylinder (4).

10. The system according to claim 2, characterized in that: Also includes a spacer (8), The pad (8) is an annular structure, adjacent to the hydraulic cylinder (61), the wheel disc (1) and the center tie rod rotor (2); the pad (8) is fixed to the wheel disc (1) by bolts.

11. The system according to claim 10, characterized in that: The central pull rod rotor (2) includes an annular groove (21), The annular groove (21), the cushion block (8) and the hydraulic cylinder (61) are interlocked with each other, and the cushion block (8) and the hydraulic cylinder (61) are arranged in the annular groove (21).

12. The system according to claim 8, characterized in that The central rod rotor (2) includes a plurality of transmission holes (22), A plurality of transmission holes (22) are arranged axially along the center rod rotor (2) for connecting the wheel disc (1) and the hydraulic device (6) and arranging the wire (63); some of the transmission holes (22) are connected to the pipeline (60).

13. The system according to claim 1, wherein: The sensing device (5) comprises a temperature sensor (51) and a strain sensor (52).

14. A method for installing a gas turbine rotor tie rod automatic control system according to any one of claims 1 to 13, characterized in that: include: The sensing device (5) is arranged at the gap between the center rod rotor (2) and the wheel disc (1), and the hydraulic device (6) is embedded in the center rod rotor (2) and fastened by bolts; The central pull rod rotor (2) is placed vertically, the sensor device (5) is lifted up and directed downwards, and the wheel disc (1) and the rotating neck bearing (3) are installed and tightened in sequence.

15. The method according to claim 14, characterized in that: The sensing device (5) is arranged at the gap between the central pull rod rotor (2) and the wheel disc (1), comprising: The wires (63) are passed through the transmission hole (22) and the pipeline (60) and converged at the entrance of the wire hole (6221) to form a bus to connect the calculation and power control module (621).

16. The method according to claim 14, characterized in that: The hydraulic device (6) is embedded in the central pull rod rotor (2) and fastened by bolts, comprising: The pad (8) and the hydraulic cylinder (61) are embedded in the annular groove (21), and the wire (63) is connected to the radial displacement module (6223) and the calculation and power control module (621).

17. A control method for a gas turbine rotor tie rod automatic control system according to any one of claims 1 to 13, characterized in that: include: The sensing device (5) collects sensing parameters, transmits the sensing parameters to the hydraulic device (6) to obtain correction parameters, and the hydraulic device (6) regulates the hydraulic oil (7) according to the correction parameters.

18. The method according to claim 17, characterized in that: The sensing parameters are transmitted to the hydraulic device (6) to obtain correction parameters, including: The sensing parameters include temperature and axial force; The sensing parameters are transmitted to the calculation and power control module (621) through the wire (63) to obtain the correction parameters.

19. The method according to claim 17, wherein: The hydraulic device (6) regulates the hydraulic oil (7) according to the correction parameter, including: The electrostrictive module (6222) and the radial displacement module (6223) are controlled to move radially according to the correction parameters, so that the radial position of the radial piston (6224) is changed, thereby pressing the hydraulic oil (7) into the hydraulic cylinder (62).

20. The method according to claim 18, wherein: Also includes: The data processed by the calculation and power control module (621) and the sensing parameters collected by the sensing device (5) are uploaded to a remote computer terminal via a signal transmitter (64).

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