Intelligent vibration control steam turbine generator base structure and control method thereof

Abstract

The invention discloses an intelligent vibration control steam turbine generator base structure and a control method thereof. The intelligent vibration control steam turbine generator base structure comprises a high-pressure cylinder supporting structure, a medium-pressure cylinder supporting structure, a low-pressure cylinder A supporting structure, a low-pressure cylinder B supporting structure and a generator supporting structure which are sequentially arranged in the longitudinal axial direction of a steam turbine generator unit. Adjusting parts are arranged at the bottoms of frame cross beams of the high-pressure cylinder supporting structure, the medium-pressure cylinder supporting structure, the low-pressure cylinder A supporting structure, the low-pressure cylinder B supporting structure and the generator supporting structure correspondingly, and vibration displacement sensors used for monitoring are arranged at the tops of the frame cross beams of the high-pressure cylinder supporting structure, the medium-pressure cylinder supporting structure, the low-pressure cylinder A supporting structure, the low-pressure cylinder B supporting structure and the generator supporting structure correspondingly. The power performance of the turbine generator base structure can be adjusted according to different unit operation conditions, base vibration is reduced, intelligent control over base vibration is achieved, and stable and safe unit operation is guaranteed. The intelligent vibration control system greatly enhances the adaptability of the base to different working conditions of the unit, expands the application range of the base, and reduces the transformation and maintenance cost of the base.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine generator base control, and in particular to an intelligent vibration controlled steam turbine generator base structure and a control method thereof. Background Art

[0002] In thermal power plants, the steam turbine generator base is the foundation of power equipment, and its excellent dynamic performance is an important condition to ensure the smooth operation of the unit. In the current reinforced concrete frame base structure design, large beam and column sections are often used for vibration control reasons. The very high frame beam makes the space in the middle layer of the base tight and the process pipeline layout difficult; the reinforced concrete frame beam and column section is huge, the reinforced concrete project is large, the cost is high, and the construction is complex; the dynamic characteristics of the base are complex and the vibration control requirements are high. Once the vibration does not meet the requirements in the actual project, the base modification is difficult; the base is prone to excessive vibration when passing through the resonance frequency during the unit startup phase, affecting the stability and safety of the equipment; after the unit has been in operation for a long time, with the wear of the unit and the increase of the rotor eccentricity, the vibration of the base continues to increase, which may exceed the control limit requirements; when the unit is operating in an unexpected accident condition, the huge unbalanced disturbance force will cause strong vibration of the base, which may damage the unit equipment; after the unit equipment is modified and replaced, the dynamic performance of the base often cannot adapt to the new unit equipment, and it is necessary to redesign the power and reconstruct it, which is technically difficult, has a long cycle, and has high modification costs. Summary of the invention

[0003] The purpose of the present invention is to provide a steam turbine generator base structure with intelligent vibration control and a control method thereof in view of the above-mentioned deficiencies. Through the steam turbine generator base structure and the intelligent vibration control system, a steam turbine, generator and pipeline support structure with adjustable mass distribution is realized, and the steam turbine generator base structure can adjust its own dynamic performance according to different unit operating conditions, reduce the base vibration, realize intelligent control of the base vibration, ensure the smooth and safe operation of the unit, greatly enhance the adaptability of the base to different unit operating conditions, expand the scope of use of the base, and reduce the modification and maintenance cost of the base.

[0004] The present invention is achieved through the following scheme:

[0005] A steam turbine generator base structure with intelligent vibration control, at least including but not limited to a high-pressure cylinder support structure, a medium-pressure cylinder support structure, a low-pressure cylinder A support structure, a low-pressure cylinder B support structure and a generator support structure arranged in sequence along the longitudinal axis of the steam turbine generator unit; an adjustment part with adjustable mass distribution is arranged at the bottom of the high-pressure cylinder support structure, the medium-pressure cylinder support structure, the low-pressure cylinder A support structure, the low-pressure cylinder B support structure and the generator support structure, and a vibration displacement sensor for monitoring is arranged on the top, and the vibration displacement sensor and the adjustment part are connected to the intelligent vibration control system; a pipeline support structure is arranged at the lower side of the high-pressure cylinder support structure, the medium-pressure cylinder support structure and the generator support structure.

[0006] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the high-pressure cylinder support structure includes a first frame column, a second frame column, a first frame crossbeam, a second frame crossbeam and a first frame longitudinal beam; a first frame crossbeam is arranged between the tops of two of the first frame columns in the horizontal direction, a second frame crossbeam is arranged between the tops of two of the second frame columns in the horizontal direction, and two first frame longitudinal beams are respectively arranged between the tops of two of the first frame columns and two of the second frame columns in the longitudinal direction.

[0007] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the intermediate pressure cylinder support structure includes a second frame column, a third frame column, a second frame cross beam, a third frame cross beam and a second frame longitudinal beam; a third frame cross beam is arranged between the tops of two third frame columns in the horizontal direction, and two second frame longitudinal beams are respectively arranged between the tops of two second frame columns and two third frame columns in the longitudinal direction.

[0008] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the low-pressure cylinder A support structure includes a third frame column, a fourth frame column, a third frame crossbeam, a fourth frame crossbeam and a third frame longitudinal beam; a fourth frame crossbeam is arranged between the tops of two fourth frame columns in the horizontal direction, and two third frame longitudinal beams are respectively arranged between the tops of two third frame columns and two fourth frame columns in the longitudinal direction.

[0009] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the low-pressure cylinder B support structure includes a fourth frame column, a fifth frame column, a fourth frame crossbeam, a fifth frame crossbeam and a fourth frame longitudinal beam; a fifth frame crossbeam is arranged between the tops of two of the fifth frame columns in the transverse direction, and two fourth frame longitudinal beams are respectively arranged between the tops of two of the fourth frame columns and two of the fifth frame columns in the longitudinal direction.

[0010] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the generator support structure includes a fifth frame column, a sixth frame column, a fifth frame crossbeam, a sixth frame crossbeam and a fifth frame longitudinal beam; a sixth frame crossbeam is arranged between the tops of two sixth frame columns in the horizontal direction, and two fifth frame longitudinal beams are respectively arranged between the tops of two fifth frame columns and two sixth frame columns in the longitudinal direction.

[0011] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, according to the positions of the steam turbine and generator bearing seats, the vibration displacement sensor is arranged at the top bearing seat positions of the first frame beam, the second frame beam, the third frame beam, the fourth frame beam, the fifth frame beam, and the sixth frame beam.

[0012] Based on the above-mentioned intelligent vibration controlled steam turbine generator base structure, the adjustment part includes an H-shaped steel beam arranged at the bottom of the first frame beam, the second frame beam, the third frame beam, the fourth frame beam, the fifth frame beam, and the sixth frame beam, and two left and right intelligent slide rails are arranged on the upper flange of the H-shaped steel beam. A mass block is hung under the intelligent slide rail, and the intelligent slide rail is connected to the intelligent vibration control system. Under the control of the intelligent vibration control system, the intelligent slide rail can move along the length direction of the H-shaped steel beam.

[0013] The present invention also discloses a control method for a steam turbine generator base structure with intelligent vibration control, which comprises the following steps:

[0014] Step 1: Based on the rotor mass m at the i-th bearing seat of the steam turbine and generator i Calculate the vibration load F acting on the foundation i , according to the steady-state analysis of the finite element model of the base, the calculated amplitude U of the i-th bearing seat position is obtained ci , the new foundation design makes the calculated amplitude U ci Less than the calculated limit, the base can run smoothly:

[0015] Step 2: construct a mass block distribution matrix according to the number of frame beams and the size of the mass block; the columns of the mass block distribution matrix represent the first to sixth frame beams respectively, and the rows of the mass block distribution matrix represent the mass block distribution state. The matrix value of 1 indicates that the mass block is at this cell position, and the matrix value of 0 indicates that the mass block is not at this cell position. The number of matrix rows is determined by the cells divided by the mass block size and the movable range. Each frame beam is divided into 7 cells of the mass block distribution matrix;

[0016] Step 3: The intelligent vibration control system determines in real time whether the vibration amplitude measured by the vibration displacement sensor at the top of each frame beam exceeds the measured limit. If it exceeds the measured limit, the following two adjustments are made: (1) The mass block distribution matrix of the frame beam where the measured amplitude exceeds the limit is simulated and adjusted. The mass block distribution moves from both sides to the middle row of the column. Each time, the outermost mass block can be moved one cell toward the middle. (2) The vibration load F is adjusted. i According to the measured amplitude, it is enlarged to F i ×(U mi / U ci ), where U mi is the measured amplitude at the i-th bearing seat position;

[0017] Step 4: According to the generated simulated adjustment mass block distribution matrix and the amplified vibration load, the calculated amplitude is obtained according to the steady-state analysis of the finite element model of the base to determine whether it meets the calculation limit requirements; if not, return to step 3, further simulate and adjust the mass block distribution matrix, and recalculate the amplitude until the calculation limit requirements are met; if all the calculated amplitudes of the simulated adjustment mass block distribution matrices cannot meet the calculation limit requirements, the intelligent vibration control system prompts to increase the mass block or replace a heavier mass block;

[0018] Step five, when the amplitude calculated by simulating the adjustment of the mass block distribution matrix meets the calculation limit requirements, the intelligent vibration control system controls the intelligent slide rail to adjust the mass block position according to the simulated adjustment of the mass block distribution matrix; the intelligent vibration control system determines whether the actual vibration amplitude meets the actual measurement limit requirements based on the data collected in real time by the vibration displacement sensor; if not, return to the intelligent control step three, and further simulate the adjustment of the mass block distribution matrix until the actual vibration amplitude is controlled below the actual measurement limit, and the unit operates normally and stably; if all the actual amplitudes of the simulated adjustment of the mass block distribution matrices cannot meet the actual measurement limit requirements, the intelligent vibration control system prompts to add mass blocks or replace heavier mass blocks.

[0019] In step one,

[0020] Where: F i is the base vibration load (N); m i is the mass of the rotor acting on the ith bearing seat on the base (kg); G is the parameter for measuring the rotor balance quality grade (m / s); ω0 is the angular velocity at the rated operating speed of the unit (rad / s); ω is the angular velocity when calculating the vibration load speed (rad / s).

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. According to the characteristics of steam turbine and generator power equipment and the layout requirements of process pipelines, the steam turbine generator base adopts a reinforced concrete frame structure, which is composed of frame columns, frame longitudinal beams, frame cross beams and intermediate platform to meet the base structure supporting steam turbines, generators and pipelines.

[0023] 2. An H-shaped steel beam is arranged at the bottom of the frame crossbeam, and two left and right intelligent slide rails are arranged on the upper flange of the H-shaped steel beam. A mass block is hung under the intelligent slide rail to realize a steam turbine generator base structure with adjustable mass distribution.

[0024] 3. The base column adopts reinforced concrete frame column, and the beam adopts reinforced concrete frame beam. An H-shaped steel beam is set at the bottom. Two left and right intelligent slide rails are set on the upper flange of the H-shaped steel beam. Mass blocks (lead blocks) are hung under the intelligent slide rails. The H-shaped steel beam forms a slide rail space. The lower flange of the H-shaped steel can be used to support and hang process pipelines to meet the requirements of process expertise.

[0025] 4. Reinforced concrete frame beams need to be made very large to control vibration, but the reinforcement is often at the minimum reinforcement ratio. The utilization rate of the reinforced concrete bearing capacity is very low, which is very uneconomical. By reducing the beam height and the amount of reinforced concrete, costs can be saved and the utilization efficiency of the reinforced concrete structure can be improved. At the same time, the increased space is more conducive to the layout of process professional pipeline equipment and improves space utilization.

[0026] 5. The vibration size can be monitored in real time. By adjusting the position of the mass block, the vibration of the base can be reduced to ensure the normal and stable operation of the unit, avoiding the problem of excessive vibration of the base caused by the error between the design calculation and the actual operation.

[0027] 6. When the speed passes through the base frequency during the startup phase, the position of the mass block can be adjusted through the intelligent control system to ensure that the base does not vibrate excessively.

[0028] 7. It can adjust the problem of excessive vibration of the base caused by the increase of disturbance force due to long-term operation of the unit; by adjusting the position of the mass block, it can ensure that the base can adapt to the needs of unit vibration control for a long time.

[0029] 8. It can effectively respond to unexpected accidents, adjust the position of the mass block in time, and continuously provide feedback to reduce the vibration of the base, ensuring that the equipment unit will not be seriously damaged due to the unlimited expansion of the base vibration.

[0030] 9. It can adapt to the replacement of unit equipment. For new equipment units, by adjusting the mass block, the base can adapt well to the new unit. There is no need to carry out structural transformation design and construction of the base, which expands the scope of use of the base, greatly reduces the cost of equipment replacement and transformation, and improves the efficiency of equipment replacement and transformation.

[0031] 10. The steam turbine generator base structure can adjust its own dynamic performance according to different unit operating conditions, reduce base vibration, realize intelligent control of base vibration, and ensure the smooth and safe operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The plan layout of the steam turbine generator foundation structure for intelligent vibration control;

[0033] Figure 2 A longitudinal cross-sectional view of a steam turbine generator base structure for intelligent vibration control;

[0034] Figure 3 A transverse cross-sectional view of a steam turbine generator base structure for intelligent vibration control;

[0035] Figure 4 A flow chart of a steam turbine generator base structure system with intelligent vibration control

[0036] Figure 5 Calculate the amplitude of vibration and calculate the limit amplitude-frequency curve;

[0037] Figure 6 It is the time history curve diagram of the measured vibration amplitude and the measured limit value;

[0038] Markings in the figure: 1. first frame column; 2. first frame crossbeam; 3. second frame column; 4. second frame crossbeam; 5. first frame longitudinal beam; 6. third frame column; 7. third frame crossbeam; 8. second frame longitudinal beam; 9. fourth frame column; 10. fourth frame crossbeam; 11. third frame longitudinal beam; 12. fifth frame column; 13. fifth frame crossbeam; 14. fourth frame longitudinal beam; 15. sixth frame column; 16. sixth frame crossbeam; 17. fifth frame longitudinal beam; 18. middle layer platform; 19. H-shaped steel beam; 20. intelligent slide rail; 21. mass block; 22. vibration displacement sensor; 23. intelligent vibration control system. DETAILED DESCRIPTION

[0039] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0040] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0041] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a predetermined direction, be constructed and operated in a predetermined direction, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0043] Example 1

[0044] like Figure 1 to Figure 3 As shown, the present invention provides a technical solution:

[0045] A steam turbine generator base structure with intelligent vibration control, which at least includes but is not limited to a high-pressure cylinder support structure, an intermediate-pressure cylinder support structure, a low-pressure cylinder A support structure, a low-pressure cylinder B support structure and a generator support structure arranged in sequence along the longitudinal axis of the steam turbine generator unit; an adjustment part with adjustable mass distribution is arranged at the bottom of the high-pressure cylinder support structure, the intermediate-pressure cylinder support structure, the low-pressure cylinder A support structure, the low-pressure cylinder B support structure and the generator support structure, and a vibration displacement sensor 22 for monitoring is arranged on the top, and the vibration displacement sensor 22 and the adjustment part are connected to an intelligent vibration control system 23.

[0046] Based on the above structure, the vibration displacement sensor 22 is used to monitor the signals of various structures of the steam turbine generator base, and transmit the collected models to the intelligent vibration control system 23. The intelligent vibration control system 23 determines whether the measured amplitude exceeds the measured limit. At the same time, the intelligent vibration control system 23 can also operate the adjustment part to change the gravity of the high-pressure cylinder support structure, the medium-pressure cylinder support structure, the low-pressure cylinder A support structure, the low-pressure cylinder B support structure or the generator support structure, so as to make the amplitude of each frame beam within a safe range.

[0047] As an example, a pipeline support structure is provided at the lower side of the high-pressure cylinder support structure, the medium-pressure cylinder support structure, and the generator support structure; and each pipeline is supported by the pipeline support structure.

[0048] As an example, the high-pressure cylinder support structure may include a first frame column 1, a second frame column 3, a first frame crossbeam 2, a second frame crossbeam 4 and a first frame longitudinal beam 5; the first frame crossbeam 2 is arranged between the tops of two first frame columns 1 in the transverse direction, the second frame crossbeam 4 is arranged between the tops of two second frame columns 3 in the transverse direction, and two first frame longitudinal beams 5 are respectively arranged between the tops of two first frame columns 1 and two second frame columns 3 in the longitudinal direction.

[0049] The medium-pressure cylinder support structure may include a second frame column 3, a third frame column 6, a second frame crossbeam 4, a third frame crossbeam 7 and a second frame longitudinal beam 8; a third frame crossbeam 7 is arranged between the tops of two third frame columns 6 in the transverse direction, and two second frame longitudinal beams 8 are respectively arranged between the tops of two second frame columns 3 and two third frame columns 6 in the longitudinal direction.

[0050] The low-pressure cylinder A supporting structure may include a third frame column 6, a fourth frame column 9, a third frame crossbeam 7, a fourth frame crossbeam 10 and a third frame longitudinal beam 11; a fourth frame crossbeam 10 is arranged between the tops of two fourth frame columns 9 in the transverse direction, and two third frame longitudinal beams 11 are respectively arranged between the tops of two third frame columns 6 and two fourth frame columns 9 in the longitudinal direction.

[0051] The low-pressure cylinder B supporting structure may include a fourth frame column 9, a fifth frame column 12, a fourth frame crossbeam 10, a fifth frame crossbeam 13 and a fourth frame longitudinal beam 14; a fifth frame crossbeam 13 is arranged between the tops of two fifth frame columns 12 in the transverse direction, and two fourth frame longitudinal beams 14 are respectively arranged between the tops of two fourth frame columns 9 and two fifth frame columns 12 in the longitudinal direction.

[0052] The generator support structure may include a fifth frame column 12, a sixth frame column 15, a fifth frame crossbeam 13, a sixth frame crossbeam 16 and a fifth frame longitudinal beam 17; a sixth frame crossbeam 16 is arranged between the tops of two sixth frame columns 15 in the transverse direction, and two fifth frame longitudinal beams 17 are respectively arranged between the tops of two fifth frame columns 12 and two sixth frame columns 15 in the longitudinal direction.

[0053] An intermediate platform 18 is provided in the middle of the two first frame columns 1, the two second frame columns 3, the two third frame columns 6, the two fifth frame columns 12, and the two sixth frame columns 15 to form a pipeline support structure;

[0054] As an example, according to the position of the turbine and generator bearing seats, the vibration displacement sensor 22 is set at the top bearing seat position of the first frame beam 2, the second frame beam 4, the third frame beam 7, the fourth frame beam 10, the fifth frame beam 13, and the sixth frame beam 16. The vibration displacement sensor 22 collects vibration data in real time and transmits it to the intelligent vibration control system 23.

[0055] According to the characteristics of steam turbine and generator power equipment and the layout requirements of process pipelines, the steam turbine generator base adopts a reinforced concrete frame structure, which is composed of frame columns, frame longitudinal beams, frame cross beams and an intermediate layer platform 18 to meet the base structure supporting the steam turbine, generator and pipelines.

[0056] As an example, the adjustment part may include an H-shaped steel beam 19 arranged at the bottom of the first frame beam 2, the second frame beam 4, the third frame beam 7, the fourth frame beam 10, the fifth frame beam 13, and the sixth frame beam 16, and two left and right intelligent slide rails 20 are arranged on the upper flange of the H-shaped steel beam 19. A mass block 21 is suspended under the intelligent slide rail 20. The intelligent slide rail 20 is connected to the intelligent vibration control system 23. Under the control of the intelligent vibration control system 23, the intelligent slide rail 20 can move along the length direction of the H-shaped steel beam 19.

[0057] Based on the above structure, when the vibration displacement sensor 22 collects abnormal vibration data, the intelligent vibration control system 23 controls the movement of the intelligent slide rail 20, thereby driving the movement of the mass block 21, changing the mass distribution of the overall beam structure, and thus changing the amplitude at that position so that it is within a safe range. Through this solution, the steam turbine generator base can be adjusted in various situations.

[0058] Example 2

[0059] like Figures 4 to 6 As shown, based on the base structure of the above-mentioned embodiment 1, the present invention provides a technical solution:

[0060] A control method for a steam turbine generator base structure with intelligent vibration control, comprising the following steps:

[0061] Step 1: Based on the rotor mass m at the i-th bearing seat of the steam turbine and generator i The vibration load F acting on the base is calculated as follows: i , according to the steady-state analysis of the finite element model of the base, the calculated amplitude U of the i-th bearing seat position is obtained ci , the new foundation design makes the calculated amplitude U ci Less than the calculated limit, the base can run smoothly:

[0062] Where: F i is the base vibration load (N); m i is the mass of the rotor acting on the ith bearing seat on the base (kg); G is the parameter for measuring the rotor balance quality grade (m / s); ω0 is the angular velocity at the rated operating speed of the unit (rad / s); ω is the angular velocity when calculating the vibration load speed (rad / s).

[0063] Step 2: According to the number of frame beams and the size of mass blocks, a mass block distribution matrix is ​​constructed; the columns of the mass block distribution matrix represent the first to sixth frame beams respectively, and the rows of the mass block distribution matrix represent the mass block distribution status. The matrix value of 1 indicates that the mass block is at this cell position, and the matrix value of 0 indicates that the mass block is not at this cell position. The number of matrix rows is determined by the cells divided by the mass block size and the movable range. The mass block distribution matrix of each frame beam divided into 7 cells is as follows:

[0064]

[0065] Step 3: The intelligent vibration control system determines in real time whether the measured vibration amplitude collected by the vibration displacement sensor at the top of each frame beam exceeds the measured limit; if it exceeds the measured limit, the following two adjustments are made: (1) Simulate the adjustment of the mass block distribution matrix of the frame beam where the measured amplitude exceeds the limit. The mass block distribution moves from both sides to the middle row of the column. Each time, the outermost mass block can be moved one cell to the middle. For example, assuming that the measured vibration amplitude of the third frame beam exceeds the limit, move the mass block in the 6th row and 3rd column of the mass block matrix to the 5th row and 3rd column, and generate the simulated adjustment mass block distribution matrix as follows; (2) Adjust the vibration load F i According to the measured amplitude, it is enlarged to F i ×(U mi / U ci ), where U mi is the measured amplitude at the i-th bearing seat position;

[0066]

[0067] Step 4: According to the generated simulation adjustment mass block distribution matrix and the amplified vibration load, obtain the calculated amplitude based on the steady-state analysis of the base finite element model to see if it meets the calculation limit requirements. If not, return to the intelligent control step 3, further simulate and adjust the mass block distribution matrix, and recalculate the amplitude until it meets the calculation limit requirements. If all the calculated amplitudes of the simulated adjustment mass block distribution matrices cannot meet the calculation limit requirements, the intelligent vibration control system prompts to add mass blocks or replace heavier mass blocks;

[0068] Step 5: When the amplitude calculated by simulating the adjustment of the mass block distribution matrix meets the calculation limit requirements, the intelligent vibration control system controls the intelligent slide rail to adjust the mass block position according to the simulated adjustment of the mass block distribution matrix. The intelligent vibration control system determines whether the measured vibration amplitude meets the measured limit requirements based on the data collected in real time by the vibration displacement sensor; if not, it returns to the intelligent control step 3 and further simulates the adjustment of the mass block distribution matrix until the measured vibration amplitude is controlled below the measured limit, and the unit operates normally and smoothly. If the measured amplitudes of all simulated adjustment mass block distribution matrices cannot meet the measured limit requirements, the intelligent vibration control system prompts to add mass blocks or replace heavier mass blocks.

[0069] This solution realizes a steam turbine, generator and pipeline support structure with adjustable mass distribution. The steam turbine generator base structure can adjust its own power performance according to different unit operating conditions, reduce base vibration, realize intelligent control of base vibration, and ensure stable and safe operation of the unit.

[0070] The intelligent vibration control system greatly enhances the adaptability of the foundation to different operating conditions of the unit, expands the scope of use of the foundation, and reduces the cost of modification and maintenance of the foundation.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam turbine generator base structure with intelligent vibration control, characterized in that: At least including but not limited to the high-pressure cylinder support structure, the medium-pressure cylinder support structure, the low-pressure cylinder A support structure, the low-pressure cylinder B support structure and the generator support structure which are arranged in sequence along the longitudinal axis of the steam turbine generator unit; at the bottom of the high-pressure cylinder support structure, the medium-pressure cylinder support structure, the low-pressure cylinder A support structure, the low-pressure cylinder B support structure and the generator support structure, an adjustment part with adjustable mass distribution is arranged, and at the top, a vibration displacement sensor for monitoring is arranged, and the vibration displacement sensor and the adjustment part are connected to the intelligent vibration control system; a pipeline support structure is arranged at the lower side of the high-pressure cylinder support structure, the medium-pressure cylinder support structure and the generator support structure.

2. The intelligent vibration controlled steam turbine generator base structure according to claim 1, characterized in that: The high-pressure cylinder support structure includes a first frame column, a second frame column, a first frame crossbeam, a second frame crossbeam and a first frame longitudinal beam; a first frame crossbeam is arranged between the tops of two of the first frame columns in the transverse direction, a second frame crossbeam is arranged between the tops of two of the second frame columns in the transverse direction, and two first frame longitudinal beams are respectively arranged between the tops of two of the first frame columns and two of the second frame columns in the longitudinal direction.

3. The intelligent vibration controlled steam turbine generator base structure according to claim 2, characterized in that: The medium-pressure cylinder support structure includes a second frame column, a third frame column, a second frame crossbeam, a third frame crossbeam and a second frame longitudinal beam; a third frame crossbeam is arranged between the tops of two third frame columns in the transverse direction, and two second frame longitudinal beams are respectively arranged between the tops of two second frame columns and two third frame columns in the longitudinal direction.

4. The intelligent vibration controlled steam turbine generator base structure according to claim 3, characterized in that: The low-pressure cylinder A support structure includes a third frame column, a fourth frame column, a third frame crossbeam, a fourth frame crossbeam and a third frame longitudinal beam; a fourth frame crossbeam is arranged between the tops of two fourth frame columns in the transverse direction, and two third frame longitudinal beams are respectively arranged between the tops of two third frame columns and two fourth frame columns in the longitudinal direction.

5. The intelligent vibration controlled steam turbine generator base structure according to claim 4, characterized in that: The low-pressure cylinder B support structure includes a fourth frame column, a fifth frame column, a fourth frame crossbeam, a fifth frame crossbeam and a fourth frame longitudinal beam; a fifth frame crossbeam is arranged between the tops of two fifth frame columns in the transverse direction, and two fourth frame longitudinal beams are respectively arranged between the tops of two fourth frame columns and two fifth frame columns in the longitudinal direction.

6. The intelligent vibration controlled steam turbine generator base structure according to claim 5, characterized in that: The generator support structure includes a fifth frame column, a sixth frame column, a fifth frame crossbeam, a sixth frame crossbeam and a fifth frame longitudinal beam; a sixth frame crossbeam is arranged between the tops of two sixth frame columns in the transverse direction, and two fifth frame longitudinal beams are respectively arranged between the tops of two fifth frame columns and two sixth frame columns in the longitudinal direction.

7. The intelligent vibration controlled steam turbine generator base structure according to claim 6, characterized in that: According to the positions of the bearing seats of the steam turbine and the generator, the vibration displacement sensor is arranged at the top bearing seat positions of the first frame beam, the second frame beam, the third frame beam, the fourth frame beam, the fifth frame beam and the sixth frame beam.

8. The intelligent vibration controlled steam turbine generator base structure according to claim 7, characterized in that: The adjustment part includes an H-shaped steel beam arranged at the bottom of the first frame beam, the second frame beam, the third frame beam, the fourth frame beam, the fifth frame beam, and the sixth frame beam, and two left and right intelligent slide rails are arranged on the upper flange of the H-shaped steel beam. A mass block is hung under the intelligent slide rail, and the intelligent slide rail is connected to the intelligent vibration control system. Under the control of the intelligent vibration control system, the intelligent slide rail can move along the length direction of the H-shaped steel beam.

9. A control method for a steam turbine generator base structure based on the intelligent vibration control according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Based on the rotor mass m at the i-th bearing seat of the steam turbine and generator i Calculate the vibration load F acting on the foundation i , according to the steady-state analysis of the finite element model of the base, the calculated amplitude U of the i-th bearing seat position is obtained ci , the new foundation design makes the calculated amplitude U ci Less than the calculated limit, the base can run smoothly: Step 2: construct a mass block distribution matrix according to the number of frame beams and the size of the mass block; the columns of the mass block distribution matrix represent the first to sixth frame beams respectively, and the rows of the mass block distribution matrix represent the mass block distribution state. The matrix value of 1 indicates that the mass block is at this cell position, and the matrix value of 0 indicates that the mass block is not at this cell position. The number of matrix rows is determined by the cells divided by the mass block size and the movable range. Each frame beam is divided into 7 cells of the mass block distribution matrix; Step 3: The intelligent vibration control system determines in real time whether the vibration amplitude measured by the vibration displacement sensor at the top of each frame beam exceeds the measured limit. If it exceeds the measured limit, the following two adjustments are made: (1) The mass block distribution matrix of the frame beam where the measured amplitude exceeds the limit is simulated and adjusted. The mass block distribution moves from both sides to the middle row of the column. Each time, the outermost mass block can be moved one cell toward the middle. (2) The vibration load F is adjusted. i According to the measured amplitude, it is enlarged to F i ×(U mi / U ci ), where U mi is the measured amplitude at the i-th bearing seat position; Step 4: According to the generated simulated adjustment mass block distribution matrix and the amplified vibration load, the calculated amplitude is obtained according to the steady-state analysis of the finite element model of the base to determine whether it meets the calculation limit requirements; if not, return to step 3, further simulate and adjust the mass block distribution matrix, and recalculate the amplitude until the calculation limit requirements are met; if all the calculated amplitudes of the simulated adjustment mass block distribution matrices cannot meet the calculation limit requirements, the intelligent vibration control system prompts to increase the mass block or replace a heavier mass block; Step five, when the amplitude calculated by simulating the adjustment of the mass block distribution matrix meets the calculation limit requirements, the intelligent vibration control system controls the intelligent slide rail to adjust the mass block position according to the simulated adjustment of the mass block distribution matrix; the intelligent vibration control system determines whether the actual vibration amplitude meets the actual measurement limit requirements based on the data collected in real time by the vibration displacement sensor; if not, return to the intelligent control step three, and further simulate the adjustment of the mass block distribution matrix until the actual vibration amplitude is controlled below the actual measurement limit, and the unit operates normally and stably; if all the actual amplitudes of the simulated adjustment of the mass block distribution matrices cannot meet the actual measurement limit requirements, the intelligent vibration control system prompts to add mass blocks or replace heavier mass blocks.

10. The control method according to claim 9, characterized in that: In step one, Where: F i is the vibration load of the base; m i is the rotor mass acting on the i-th bearing seat on the base; G is the parameter for measuring the rotor balance quality level; ω0 is the angular velocity at the rated operating speed of the unit; ω is the angular velocity when calculating the vibration load rotation speed.

Images