Shafting center deviation measurement method for steam turbine unit

Abstract

A shafting center deviation measurement method for a steam turbine unit (2), comprising: selecting a plurality of measurement positions on a foundation platform of a steam turbine unit (2) along a shafting of the steam turbine unit (2) (S1); mounting a settlement monitoring system (1) on the foundation platform (S2); acquiring an elevation change amount at each measurement position within a measurement time period (S3); and acquiring a shafting center deviation of the steam turbine unit (2) on the basis of the elevation change amounts at the plurality of measurement positions, position data of the plurality of measurement positions, and dimension and position data of each coupling in the steam turbine unit (2) (S4).

Description

Method for measuring the center deviation of steam turbine shaft system Technical Field

[0001] This application relates to the field of steam turbine technology, and in particular to a method for measuring the center deviation of a steam turbine shaft system. Background Technology

[0002] As the operating conditions of the turbine unit change and its operating time increases, uneven settlement of the turbine unit foundation platform causes a shift in the shaft center. This shift in the shaft center leads to a redistribution of loads on the various bearings. In severe cases, excessive bearing load and high temperature can cause localized tungsten melting, while insufficient bearing load can cause unstable oil film eddies or even oil film oscillations. Therefore, it is necessary to measure and adjust the deviation of the turbine unit's shaft center.

[0003] Currently, measuring the deviation of the shaft system center requires disassembling the couplings in the shaft system during a major overhaul. After disassembly, auxiliary tools such as dial indicators are used to measure the center deviation of the couplings. However, a steam turbine unit has multiple couplings, and the center deviation data of these multiple couplings combine to form the deviation of the turbine unit's shaft system center. Therefore, during a major overhaul, measuring the deviation of the entire shaft system center requires disassembling and reassembling multiple couplings.

[0004] Each disassembly of a set of wheelsets requires at least 24 hours of overhaul time. This disassembly-based measurement method is labor-intensive and results in a longer overhaul period. Summary of the Invention

[0005] This application provides a method for measuring the center deviation of the turbine shaft system, aiming to solve the problems of long measurement time and large workload in existing measurement methods.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A method for measuring the center deviation of a turbine generator set shaft system is constructed, including:

[0008] Multiple measurement locations were selected along the turbine shaft system on the foundation platform of the turbine unit;

[0009] The settlement monitoring system is installed on the aforementioned foundation platform;

[0010] Obtain the elevation change at each of the measurement locations during the measurement period;

[0011] The shaft center deviation of the turbine unit is obtained based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the size and position data of each pair of wheels in the turbine unit.

[0012] In some embodiments, the settlement monitoring system includes a plurality of settlement testing mechanisms and at least one connecting mechanism, wherein the settlement testing mechanism forms a test chamber for containing test liquid;

[0013] The installation of the settlement monitoring system on the foundation platform includes:

[0014] Adjust the flatness of the base platform at each of the measurement positions to a first preset range;

[0015] At least one of the aforementioned settlement testing mechanisms shall be installed at each of the aforementioned measurement locations;

[0016] The test chambers of two adjacent settlement testing mechanisms are connected by a connecting mechanism.

[0017] In some embodiments, adjusting the flatness of the base platform at each of the measurement locations to a first preset range includes:

[0018] The surface of the base platform at each of the measurement positions is polished so that the flatness of the base platform at each of the measurement positions is within the first preset range.

[0019] In some embodiments, the installation of at least one of the settlement testing mechanisms at each of the measurement locations includes:

[0020] Adjust the absolute elevation of each of the measurement positions so that the difference between the absolute elevations of any two measurement positions is within a second preset range;

[0021] At least one settlement testing mechanism is installed at each of the aforementioned measurement locations after the absolute elevation has been adjusted.

[0022] In some embodiments, after the step of installing the settlement monitoring system on the base platform and before the step of obtaining the elevation changes at each of the measurement locations during the measurement period, the method further includes:

[0023] The settlement monitoring system was filled with water and vented.

[0024] In some embodiments, the connecting mechanism includes an air pipe and a water pipe, wherein the air pipe is used to connect the test chambers of two adjacent sedimentation testing mechanisms, and the water pipe is used to connect the test chambers of two adjacent sedimentation testing mechanisms.

[0025] The process of filling and venting the settlement monitoring system includes:

[0026] Seal the air pipes between any two adjacent sedimentation testing units;

[0027] The settlement monitoring system is connected to a water source so that water is supplied to the settlement monitoring system through the water source and the gas in the water pipe is discharged.

[0028] Disconnect the settlement monitoring system from the water source to stop the water from being supplied to the settlement monitoring system, and remove the blockage between each pair of adjacent settlement testing units.

[0029] In some embodiments, obtaining the elevation change at each of the measurement locations during the measurement time period includes:

[0030] At the initial moment of the measurement time period, the first liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations is obtained;

[0031] At the end of the measurement time period, the second liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained;

[0032] The elevation change at each measurement location during the measurement period is obtained by using the first liquid level value and the second liquid level value at each measurement location.

[0033] In some embodiments, the measurement positions are set one-to-one with the bearings of the turbine unit; each measurement position includes two measurement points, which are symmetrically distributed on both sides of the bearing, and the line connecting the two measurement points is perpendicular to the center line of the bearing; a settlement testing mechanism is installed at each measurement point.

[0034] The step of acquiring the first liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations at the initial moment of the measurement time period includes:

[0035] At the beginning of the measurement time period, the third liquid level value in the test chamber of the sedimentation testing mechanism at two measurement points of each measurement location is obtained; by averaging the third liquid level values ​​at the two measurement points, the first liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained.

[0036] At the end of the measurement time period, obtaining the second liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations includes:

[0037] At the end of the measurement time period, the fourth liquid level value in the test chamber of the sedimentation testing mechanism at two measurement points of each measurement location is obtained; by averaging the fourth liquid level values ​​at the two measurement points, the second liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained.

[0038] In some embodiments, obtaining the shaft center deviation of the turbine unit based on the elevation changes at the plurality of measurement locations, the position data of the plurality of measurement locations, and the size and position data of each pair of wheels in the turbine unit includes:

[0039] Based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the dimensional data of each pair of rotors in the turbine unit, the planar deviation between each adjacent rotor in the turbine unit is obtained respectively.

[0040] Based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the position data of each pair of rotors in the turbine unit, the circumferential deviation between each adjacent rotor in the turbine unit is obtained respectively.

[0041] The turbine shaft center deviation is formed by combining the planar deviation between adjacent rotors and the circumferential deviation between adjacent rotors.

[0042] In some embodiments, obtaining the planar deviation between adjacent rotors in the turbine unit based on the elevation changes at the plurality of measurement locations, the position data of the plurality of measurement locations, and the dimensional data of each pair of rotors in the turbine unit includes:

[0043] Based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the dimensions of each pair of wheels in the turbine unit, the elevation changes of the adjacent measurement locations on the front and rear sides of each rotor in two adjacent rotors, the distance between the adjacent measurement locations on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor are obtained respectively.

[0044] The planar deviation of the two adjacent rotors is obtained based on the elevation change of the adjacent measurement positions on the front and rear sides of each rotor, the distance between the adjacent measurement positions on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor.

[0045] In some embodiments, obtaining the planar deviation of two adjacent rotors based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor includes:

[0046] The planar deviation between the two adjacent rotors is obtained according to Formula 1;

[0047] Formula 1

[0048] in, This refers to the planar deviation between the two rotors;

[0049] This represents the initial planar deviation between the two rotors;

[0050] This represents the elevation change of adjacent measurement positions on the front side of the front rotor;

[0051] It is the diameter of the adjacent pair of wheels on the rear side of the front rotor;

[0052] This is the distance between adjacent measurement positions on the front and rear sides of the front rotor;

[0053] This represents the elevation change of adjacent measurement positions on the rear side of the front rotor.

[0054] This represents the elevation change of adjacent measurement positions on the front side of the rear rotor;

[0055] The diameter of the adjacent pair of wheels on the front side of the rear rotor;

[0056] This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor.

[0057] This represents the elevation change of the adjacent measurement position on the rear side of the rear rotor.

[0058] In some embodiments, obtaining the circumferential deviation between adjacent rotors in the turbine unit based on the elevation changes at the plurality of measurement locations, the position data of the plurality of measurement locations, and the position data of each pair of rotors in the turbine unit includes:

[0059] Based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the position data of each pair of turbines in the turbine unit, the elevation changes of the adjacent measurement locations on the front and rear sides of each rotor in two adjacent rotors, the distance between the adjacent measurement locations on the front and rear sides of each rotor, the distance from the adjacent measurement location on the rear side of the front rotor to the adjacent pair of turbines on the rear side, and the distance from the adjacent measurement location on the front side of the rear rotor to the adjacent pair of turbines on the front side are obtained respectively.

[0060] The circumferential deviation of the two adjacent rotors is obtained by measuring the elevation change of the adjacent measurement positions on the front and rear sides of each rotor, the distance between the adjacent measurement positions on the front and rear sides of each rotor, the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear wheel, and the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front wheel.

[0061] In some embodiments, obtaining the circumferential deviation of two adjacent rotors based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear wheel, and the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front wheel includes:

[0062] The circumferential deviation between the two adjacent rotors is obtained according to Formula 2;

[0063] Formula 2

[0064] in, This refers to the circumferential deviation between the two rotors;

[0065] This represents the initial circumferential deviation between the two rotors;

[0066] This represents the elevation change of adjacent measurement positions on the front side of the front rotor;

[0067] This is the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent pair of wheels on the rear side;

[0068] This is the distance between adjacent measurement positions on the front and rear sides of the front rotor;

[0069] This represents the elevation change of adjacent measurement positions on the rear side of the front rotor.

[0070] This represents the elevation change of adjacent measurement positions on the front side of the rear rotor;

[0071] The distance from the adjacent measurement position on the front side of the rear rotor to the adjacent pair of front wheels;

[0072] This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor.

[0073] This represents the elevation change of the adjacent measurement position on the rear side of the rear rotor.

[0074] In some embodiments, the measurement positions are set one-to-one with the bearings of the turbine unit, and the line connecting the measurement position and the corresponding bearing is perpendicular to the centerline of the bearing.

[0075] This application has the following beneficial effects:

[0076] This application enables online measurement of the shaft center deviation of a steam turbine unit by acquiring the elevation changes and position data at various measurement locations on the turbine unit's foundation platform, and utilizing the dimensional and positional data of each turbine pair. This measurement method avoids disassembling the turbine pairs, thereby reducing workload and shortening measurement time. Attached Figure Description

[0077] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0078] Figure 1 is a structural schematic diagram of one of the steam turbine units used in this application;

[0079] Figure 2 is a diagram showing the state changes of the foundation platform during the settlement process of the turbine unit shown in Figure 1.

[0080] Figure 3 is a schematic diagram of the turbine unit shown in Figure 1 equipped with a settlement monitoring system;

[0081] Figure 4 is a partial structural schematic diagram of the settlement monitoring system in Figure 3;

[0082] Figure 5 shows the state changes of some settlement monitoring systems during the settlement process of the foundation platform shown in Figure 2.

[0083] Figure 6 is a schematic diagram of the leveling fixture used during the installation of the settlement monitoring system shown in Figure 3.

[0084] Figure 7 is a schematic diagram of the settlement monitoring system shown in Figure 3 during the water filling and air venting process;

[0085] Figure 8 is a schematic diagram of the state of the steam turbine unit shown in Figure 3 during the process of measuring the shaft center deviation;

[0086] Figure 9 is a flowchart of a method for measuring the center deviation of a turbine shaft system in an embodiment of this application;

[0087] Figure 10 is a flowchart of step S2 shown in Figure 9 in some embodiments;

[0088] Figure 11 is a flowchart of step S22 shown in Figure 10 in some embodiments;

[0089] Figure 12 is a flowchart of step S3 shown in Figure 9 in some embodiments;

[0090] Figure 13 is a flowchart of step S3 shown in Figure 9 in some other embodiments;

[0091] Figure 14 is a flowchart of step S5 shown in Figure 9 in some embodiments;

[0092] Figure 15 is a flowchart of step S4 shown in Figure 9 in some embodiments;

[0093] Figure 16 is a flowchart of step S4 shown in Figure 9 in some other embodiments;

[0094] Figure label:

[0095] 1-Settlement monitoring system; 11-Settlement testing mechanism; 111-Test housing; 111A-First test housing; 111B-Second test housing; 111C-Third test housing; 1111-Test chamber; 1112-Liquid inlet; 1113-Liquid outlet; 1114-Gas inlet; 1115-Gas outlet; 112-Liquid level test head; 113-Cover plate; 12-Connecting mechanism; 121-Water pipe; 122-Gas pipe; 20-Data acquisition device; 2-Steam turbine unit; 201-Foundation platform; 202-High-pressure cylinder; 203-First low-pressure cylinder; 204-Second low-pressure cylinder Cylinder; 205-Generator; 206-Exciter; 207-Bearing; 2071-First Bearing; 2072-Second Bearing; 2073-Third Bearing; 2074-Fourth Bearing; 208-Gearbox; 2081-First Gearbox; 2082-Second Gearbox; 2083-Third Gearbox; 209-Support Frame; 210-Support Spring; 100-First Rotor; 200-Second Rotor; 3-Leveling Fixture; 31-Leveling Housing; 311-Leveling Cavity; 32-Leveling Pipe; 4-Water Filling Passage; 41-Water Filling Pipe; 42-Water Pump; 43-Water Storage Tank; 44-Drainage Tank. Detailed Implementation

[0096] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "bottom," "inner," "inside," and "outer" are based on the orientations or positional relationships shown in some of the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this application.

[0097] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0098] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0099] As shown in Figure 1, the turbine unit 2 includes a foundation platform 201, a high-pressure cylinder 202, a first low-pressure cylinder 203, a second low-pressure cylinder 204, a generator 205, an exciter 206, a support frame 209, multiple bearings 207, multiple couplings 208, and multiple support springs 210. The high-pressure cylinder 202, the first low-pressure cylinder 203, the second low-pressure cylinder 204, the generator 205, and the exciter 206 are sequentially mounted on the foundation platform 201. The rotors of these five components are connected sequentially via couplings 208 and supported on the foundation platform 201 by bearings 207, forming a shaft system. The support frame 209 supports the foundation platform. Multiple support springs 210 are spaced apart between the support frame 209 and the foundation platform 201, allowing adjustment of the support height of the support frame 209 on the foundation platform 201.

[0100] It is important to understand, referring to Figure 2, that as the operating conditions of turbine unit 2 change during operation and over a long period, uneven settlement may occur on the foundation platform 201, leading to changes in the center of the shaft system located on the platform. These changes in the shaft system will cause a redistribution of load on the various bearings of turbine unit 2, potentially resulting in some bearings experiencing excessive load and temperature, or others experiencing insufficient load. Excessive increases in bearing load and temperature may cause localized melting of tungsten alloy. Excessive reduction in bearing load may cause unstable oil film eddies, or even oil film oscillations. Therefore, it is necessary to periodically measure whether the center of the turbine unit 2 shaft system has deviated, so that timely adjustments can be made based on the magnitude of the deviation to reduce the occurrence of the aforementioned problems.

[0101] This application constructs a method for measuring the shaft center deviation of a steam turbine unit, which can realize online measurement of the shaft center deviation of the steam turbine unit 2. This measurement method can avoid disassembling the turbine shaft, thereby reducing workload and shortening measurement time.

[0102] It should be noted that, for the turbine shaft center deviation measurement method, in order to facilitate and clearly describe the general execution steps of the monitoring method, each step is marked with a number in this document. This corresponds to the execution steps in the accompanying drawings, clarifying the general execution method of the turbine shaft center deviation measurement method. However, this step numbering does not limit the mandatory order of the execution steps in the turbine shaft center deviation measurement method. Those skilled in the art can also select one or more steps in the turbine shaft center deviation measurement method and rearrange them individually or in combination according to actual needs to achieve specific or expected technical objectives, which is not limited here.

[0103] As shown in Figure 9, the method for measuring the shaft center deviation of this turbine unit may include:

[0104] Step S1: Select multiple measurement positions along the turbine shaft system on the foundation platform 201 of turbine unit 2.

[0105] Step S2: Install the settlement monitoring system 1 on the basic platform 201.

[0106] Step S3: Obtain the elevation change at each measurement location during the measurement period.

[0107] Step S4: Based on the elevation changes at each measurement location, the position data between multiple measurement locations, and the size and position data of each pair of wheels in the turbine unit, obtain the center deviation of the turbine unit's shaft system 2.

[0108] It's important to understand that while the positional relationships between multiple measurement points can be determined using tools like measuring rulers, measurement errors are unavoidable during the process. However, the turbine unit 2 was manufactured with detailed data on the distances and dimensions between all its components.

[0109] Therefore, in some embodiments, to ensure the accuracy of the measurement, the selection of the measurement position in step S1 can be set one-to-one with the bearing 207 of the turbine unit 2. As shown in Figures 1 and 3, the line connecting each measurement position and the corresponding bearing 207 can be perpendicular to the center line M of the bearing 207.

[0110] This setup allows the position data of each measurement point on the base platform 201 to be converted into the position of each bearing 207 on the base platform 201. Since the dimensions and distances between each bearing 207 and other components of the turbine unit 2 are recorded in detail, the measurement process can be avoided, thereby preventing measurement errors and improving measurement accuracy.

[0111] It should be understood that the centerline M of the bearing 207 can be understood as the centerline of the shaft system of the turbine unit 2. The axes of each rotor, bearing 207, and coupling 208 of the turbine unit 2 can all coincide with the centerline M. The extension direction of the centerline M can be understood as the extension direction of the shaft system of the turbine unit 2.

[0112] In some embodiments, the measurement location may include two measurement points, which may be symmetrically distributed on opposite sides of the corresponding bearing 207. The line connecting the two measurement points passes through the center of the bearing 207 and is perpendicular to the centerline M of the bearing 207.

[0113] It is important to understand that, due to the large size of turbine unit 2, setting only one measurement point on one side of bearing 207 at the corresponding position can easily lead to measurement errors. By selecting two measurement points at each measurement location, with the two measurement units symmetrically distributed on both sides of bearing 207, the error can be reduced by averaging the data from the two measurement points during the measurement process, thereby further improving the accuracy of the measurement.

[0114] Therefore, in some embodiments, step S3 may include:

[0115] The elevation changes of two measurement points at each measurement location are obtained within the measurement time period. When the elevation changes of the two measurement points at a measurement location are different, the average of the elevation changes of the two measurement points is taken to obtain the elevation change of that measurement location.

[0116] As shown in Figure 3, in some embodiments, the settlement monitoring system 1 may include a connecting pipe device 10 and a data acquisition device 20. The connecting pipe device 10 includes multiple settlement testing mechanisms 11 and a connecting mechanism 12. The multiple settlement testing mechanisms 11 can be respectively installed at various measurement locations on the foundation platform 201 to measure the settlement values ​​at each measurement location. The connecting mechanism 12 can connect the multiple settlement testing mechanisms 11 to balance the pressure values ​​between the settlement testing mechanisms 11 and improve the accuracy of the measurement. The data acquisition device 20 is electrically connected to the connecting pipe device 10 and is used to acquire the settlement values ​​measured by the connecting pipe device 10 at each measurement location.

[0117] Referring to Figure 4, the sedimentation testing mechanism 11 may include a test housing 111, a liquid level testing head 112, and an exhaust cover 113. The test housing 111 contains a test chamber 1111 for holding the test liquid. The test liquid can divide the test chamber 1111 into a gas portion and a liquid portion. The test housing 111 also has a liquid inlet 1112, a liquid outlet 1113, a gas inlet 1114, and a gas outlet 1115. The liquid inlet 1112 and liquid outlet 1113 connect the liquid portion of the test chamber 1111 to the outside. The gas inlet 1114 and gas outlet 1115 connect the gas portion of the test chamber 1111 to the outside.

[0118] The connecting mechanism 12 may include a water pipe 121 and an air pipe 122. The two ends of the water pipe 121 can be connected to the liquid inlet 1111 and liquid outlet 1113 of two adjacent sedimentation testing mechanisms 11, respectively, thereby connecting the test chambers 1111 of the two adjacent sedimentation testing mechanisms 11. Test liquid can enter the test chamber 1111 of one sedimentation testing mechanism 11 through the water pipe 121. The two ends of the air pipe 122 can be connected to the gas inlet 1114 and gas outlet 1115 of two adjacent sedimentation testing mechanisms 11, respectively, thereby connecting the test chambers 1111 of the two adjacent sedimentation testing mechanisms 11. Gas can enter the test chamber 1111 of one sedimentation testing mechanism 11 through the air pipe 122.

[0119] The liquid level test head 112 can be mounted on the test housing 111 to obtain the liquid level value of the test liquid inside the test housing 111. Each liquid level test head 112 can be electrically connected to the acquisition device 20 so that the acquisition device 20 can collect the obtained liquid level value. By observing the change in liquid level over a period of time, the liquid level change value during that period can also be obtained.

[0120] It is important to understand that, in interconnected containers under isobaric conditions, liquids always seek to reach the same potential energy level. Therefore, the sedimentation monitoring system 1 can utilize the connecting pipe device 10 to deploy multiple sedimentation testing mechanisms 11 on the base platform 201, and ensure liquid connectivity and consistent air pressure through the connection of water pipe 121 and air pipe 122. After selecting a reference point, the liquid level change value of each sedimentation testing mechanism 11 over a period of time can also be understood as the sedimentation value of the base platform 201 at its corresponding location during that period.

[0121] It should be understood that the test liquid can be water or other liquids. The liquid level test head 112 can detect the liquid level value through ranging methods such as laser, ultrasound, and capacitance. No specific limitations are made here.

[0122] The principle of the settlement monitoring system 1 will be further explained below using the specific situation shown in Figure 5 as an example.

[0123] Figure 5 illustrates the liquid level change over a period of time in a specific embodiment of the sedimentation monitoring system 1. The sedimentation monitoring system 1 is defined as including a first test housing 111A, a second test housing 111B, and a third test housing 111C, as well as a first liquid level test head 112A, a second liquid level test head 112B, and a third liquid level test head 112C. The first test housing 111A and the second test housing 111B are connected by a water pipe 121, and the second test housing 111B and the third test housing 111C are also connected by a water pipe 121. The first liquid level test head 112A is disposed on the first test housing 111A, the second liquid level test head 112B is disposed on the second test housing 111B, and the third liquid level test head 112C is disposed on the third test housing 111C.

[0124] The bottom wall surface of each test housing 111 is selected as the reference surface. The distance from the liquid level test head 112 to the reference surface is defined as N, and the distance from the liquid surface to the reference surface (i.e., the liquid level value) is defined as H. Then the value measured by the liquid level test head 112 can be... .

[0125] Under the premise of uniform internal air pressure, and through the connection of water pipe 121, the distance H from the liquid level to the reference plane in each test housing 111 is the same. The liquid level value in the first test housing 111A is now defined as... The liquid level value inside the second test housing 111B is The liquid level value inside the third test housing 111C is .

[0126] After a period of operation, assuming that the base platform 201 settles, the liquid level inside the first test housing 111A will become... The liquid level inside the second test housing 111B becomes The liquid level value inside the third test housing 111C becomes .

[0127] During this time period, the sedimentation value (liquid level change value) at the first test shell 111A is: The sedimentation value (liquid level change value) at the second test shell 111B is: The sedimentation value (liquid level change value) at point 111C in the third test shell is: .

[0128] As shown in Figure 12, in some embodiments, step S3 may include:

[0129] Step S31: At the beginning of the measurement time period, obtain the first liquid level value in the test chamber 1111 of the sedimentation testing mechanism 11 at each measurement location. .

[0130] Step S32: At the end of the measurement time period, obtain the second liquid level value in the test chamber of the sedimentation testing mechanism 11 at each measurement location. .

[0131] Step S33: Measure the first liquid level value at each measurement location. and the second liquid level value This yields the elevation changes at each measurement location during the measurement period.

[0132] The following explanation will now focus on a specific embodiment shown in Figure 5 to further illustrate step S3.

[0133] It is important to understand that if one of the test housings 111 is selected as the calibration point (measurement point), the elevation change of other locations over a period of time can be calculated.

[0134] The position of the first test housing 111A is now defined as the first measurement position, the position of the second test housing 111B is defined as the second measurement position, and the position of the third test housing 111C is defined as the third measurement position.

[0135] For example, if the first measurement position is selected as the calibration point, then the elevation change of the second measurement position relative to the first measurement position is: The elevation change of the third measurement position relative to the first measurement position is: The change in elevation of the first measurement position relative to the first measurement position can be considered as zero.

[0136] As shown in Figure 13, for an embodiment where each measurement location includes two measurement points, step S31 may include:

[0137] Step S311: At the beginning of the measurement time period, obtain the third liquid level value in the test chamber 1111 of the sedimentation test mechanism 11 at the two measurement points of each measurement location.

[0138] Step S312: By averaging the third liquid level values ​​at the two measurement points, the first liquid level value inside the test chamber 1111 of the sedimentation test structure 11 at each measurement location is obtained. .

[0139] Step S32 may include:

[0140] Step S321: At the end of the measurement time period, obtain the fourth liquid level value in the test chamber 1111 of the sedimentation test mechanism 11 at the two measurement points of each measurement location.

[0141] Step S322: By averaging the fourth liquid level values ​​at the two measurement points, the second liquid level value inside the test chamber 1111 of the sedimentation testing mechanism 11 at each measurement location is obtained. .

[0142] It is important to understand that if "initial time" is defined as... "Deadline" is Then the "measurement time period" is Among them, the , The specific value can be set flexibly according to the specific situation, and no specific limit is made here.

[0143] As shown in Figure 10, in some embodiments, step S2 may include:

[0144] Step S21: Adjust the flatness of the base platform 201 at each measurement position to the first preset range.

[0145] Step S22: Install at least one settlement testing mechanism 11 at each measurement location.

[0146] Step S23: Connect the test chambers 1111 of two adjacent settlement test mechanisms 11 through a connecting mechanism 12.

[0147] It should be understood that, since the shaft center deviation of turbine unit 2 is relatively small compared to the size of turbine unit 2, in order to ensure the accuracy of the measurement, the test chamber 1111 in the settlement test mechanism 11 is also relatively small, and its range can be selected from tens of millimeters to hundreds of millimeters, depending on the size of the shaft center deviation of turbine unit 2.

[0148] During the installation of the settlement monitoring system 1, the different flatness of the base platform 201 at various locations may cause the test chamber 1111 in the settlement testing mechanism 11 to tilt or become unstable, which may exceed its range and lead to measurement errors.

[0149] By setting step S21, potential tilting and instability of the test cavity 1111 can be effectively reduced, thereby further reducing the generation of measurement errors.

[0150] In some embodiments, step S21 may include: grinding the surface of the base platform 201 at each measurement location so that the flatness of the base platform 201 at each measurement location is within a first preset range.

[0151] It should be understood that the first preset range can be adjusted accordingly for different settlement testing mechanisms 11. For example, the first preset range can be selected as ≤0.01mm, ≤0.02mm, ≤0.03mm, ≤0.04mm, ≤0.05mm, etc.

[0152] In the embodiment where each measurement location includes two measurement points, the flatness of each measurement point can be adjusted independently. A settlement testing mechanism 11 can be installed at each measurement point. That is, two settlement testing mechanisms 11 can be correspondingly set up at one measurement location.

[0153] As shown in Figure 11, in some embodiments, step S22 may include:

[0154] Step S221: Adjust the absolute elevation of each measurement position so that the difference between the absolute elevations of any two measurement positions is within the second preset range;

[0155] Step S222: Install at least one settlement testing mechanism 11 at each measurement location after adjusting the absolute elevation.

[0156] It is important to understand that, due to the large area of ​​the foundation platform 201 of turbine unit 2, the absolute elevation of each measurement location may be inconsistent. Inconsistent absolute elevation may lead to significant height differences between different test chambers 1111, which may in turn cause measurement errors due to exceeding their range.

[0157] By setting step S221, the height difference between different test cavities 1111 can be effectively reduced, thereby further reducing the generation of measurement errors.

[0158] In some embodiments, the adjustment of the absolute elevation can be performed using the leveling fixture 3.

[0159] As shown in Figure 6, the leveling fixture 3 may include at least two leveling housings 31 and a leveling pipe 32. Each leveling housing 31 defines a leveling cavity 311 containing leveling fluid, and the housing 31 has a scale for reading the fluid level. The leveling pipe 32 connects the two leveling cavities 311, allowing the leveling fluid to flow within both cavities.

[0160] This step S221 may include:

[0161] By installing different numbers of adjustment shims at the measurement locations, the absolute elevation of each measurement location is adjusted so that the difference between the absolute elevations of any two measurement locations is within a second preset range.

[0162] Install one of the leveling housings 31 of the leveling fixture 3 at one measurement position, and install the other leveling housing 31 at another measurement position. Compare the scale values ​​corresponding to the liquid levels of the leveling liquid inside the two leveling housings 31.

[0163] If the difference between the two scale values ​​is within the target difference range, the balancing process ends. If the difference between the two scale values ​​is outside the target difference range, the balancing process is repeated.

[0164] It should be understood that, for the installation of the adjusting shims, the surface of the adjusting shims must also meet the aforementioned flatness requirements.

[0165] In some other optional embodiments, the number of leveling housings 31 in the leveling fixture 3 can be set to three, four, or more, and multiple leveling pipes 32 can be provided to connect with each other, so that the absolute elevation at multiple measurement positions can be adjusted at one time through one leveling fixture 3.

[0166] In some embodiments, the absolute height difference between multiple measurement locations after adjusting the absolute elevation can be less than or equal to 0.5 mm. That is, the aforementioned second preset range can be ≤0.5 mm.

[0167] It should be understood that the second preset range after leveling can be adaptively adjusted for settlement testing mechanisms 11 with different ranges. For settlement testing mechanisms 11 with larger ranges, the second preset range can also be other ranges such as ≤0.6mm or ≤0.8mm.

[0168] As shown in Figure 9, in some embodiments, between step S2 and step S3, the turbine shaft center deviation measurement method may further include:

[0169] Step S5: Fill the settlement monitoring system 1 with water and vent the air.

[0170] It is important to understand that during the installation of the settlement monitoring system 1, the water pipe 121 of the connecting mechanism 12 does not contain liquid but contains gas. Therefore, during the measurement process, the gas in the water pipe 121 can easily hinder the flow of liquid in the various test chambers 1111, leading to a decrease in measurement accuracy. By filling the settlement monitoring system 1 with water and venting the gas before measurement, this decrease in measurement accuracy can be effectively avoided.

[0171] As shown in Figure 14, in some embodiments, step S5 includes:

[0172] Step S51: Seal the air pipes 122 between each of two adjacent settlement test mechanisms 11.

[0173] Step S52: Connect the settlement monitoring system 1 to a water source to fill the settlement monitoring system 1 with water and expel the gas in the water pipe 121.

[0174] Step S53: Disconnect the settlement monitoring system 1 from the water source to stop filling the settlement monitoring system 1 with water through the water source, and unblock the air pipe 122 between each two adjacent settlement test units 11.

[0175] It should be understood that in step S51, the gas tube 122 can be blocked by removing the gas tube 122 and blocking the gas inlet 1114 and gas outlet 1115 of each test housing 111.

[0176] Referring to Figure 7, in step S52, water is filled into the settlement monitoring system 1, which can be achieved by forming a water filling passage 4 on the settlement monitoring system 1.

[0177] For example, a water storage tank 43, a drainage tank 44, a water pump 42, and multiple water filling pipes 41 can be installed on the settlement monitoring system 1. The water filling pipe 41 can be connected to the liquid inlet 1112 of the test housing 111 at one end of the settlement monitoring system 1, and the water pump 42 is installed on the water filling pipe 41. The upstream end of the water filling pipe 41 is connected to the water storage tank 43. Similarly, the water filling pipe 41 can be connected to the liquid outlet 1113 of the test housing 111 at the other end of the settlement monitoring system 1, and the downstream end of the water filling pipe 41 is connected to the drainage tank 44.

[0178] Since each test housing 111 of the sedimentation monitoring system 1 is connected by a water pipe 121, the water in the water storage tank 43 can flow into the drainage tank 44 in sequence through the water filling pipe 41, multiple test housings 111, multiple water pipes 121, and water filling pipe 41 under the drive of the water pump 42, thereby realizing the discharge of gas in the water pipe 121.

[0179] It is important to understand that the water filling and venting process needs to last for a certain period of time. This can be 20 minutes, 30 minutes, 40 minutes, 50 minutes, 60 minutes, etc., and no specific limit is set here, as long as the gas in the water pipe 121 is vented.

[0180] It should be understood that, since the liquid level test head 112 is electrically connected to the data acquisition device 20, there may be a problem of damage to the liquid level test head 112 during the water filling process.

[0181] Therefore, in some embodiments, the sedimentation testing mechanism 11 may further include multiple cover plates 113, which are detachably mounted on the test housing 111. When step S5 needs to be performed, the liquid level test head 112 can be removed from the test housing 111 first, and the cover plates 113 can be installed on the test housing 111 to seal the position of the liquid level test head 112. After step S5 is completed, the cover plates 113 are removed and the liquid level test head 112 is reassembled.

[0182] As shown in Figure 15, in some embodiments, step S4 may include:

[0183] Step S41: Based on the elevation changes at multiple measurement locations, the position data at multiple measurement locations, and the dimensional data of each pair of rotors in turbine unit 2, obtain the planar deviation between each adjacent rotor in turbine unit 2.

[0184] Step S42: Based on the elevation changes at multiple measurement locations, the position data at multiple measurement locations, and the position data of each pair of rotors in the turbine unit, obtain the circumferential deviation between each adjacent rotor in turbine unit 2.

[0185] Step S43: Based on the planar deviation between each adjacent rotor and the circumferential deviation between each adjacent rotor, the turbine shaft center deviation is formed by combining them.

[0186] As shown in Figure 16, in some embodiments, step S41 may include:

[0187] Step S411: Based on the elevation changes at multiple measurement locations, the position data of multiple measurement locations, and the size data of each pair of wheels in turbine unit 2, obtain the elevation changes of adjacent measurement locations on the front and rear sides of each rotor, the distance between adjacent measurement locations on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor.

[0188] Step S412: Based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor, obtain the planar deviation of the two adjacent rotors.

[0189] It is important to understand that since this turbine unit 2 includes multiple rotors connected end-to-end, there are multiple sets of adjacent rotors, allowing us to obtain the planar deviations of multiple adjacent rotors. The following explanation uses one set of adjacent rotors as an example to further illustrate step S41:

[0190] Referring to Figure 8, the rotor of the first low-pressure cylinder 203 in turbine unit 2 is now defined as the first rotor 100, and the rotor of the second low-pressure cylinder 204 is defined as the second rotor 200. The coupling on the side of the first rotor 100 away from the second rotor 200 is defined as the first coupling 2081, the coupling between the first rotor 100 and the second rotor 200 is defined as the second coupling 2082, and the coupling on the side of the second rotor 200 away from the first rotor 100 is defined as the third coupling 2083. The bearings on both sides of the first rotor 100 are the first bearing 2071 and the second bearing 2072, respectively, and the bearings on both sides of the second rotor 200 are the third bearing 2073 and the fourth bearing 2074, respectively. The second bearing 2072 and the third bearing 2073 are located between the first rotor 100 and the second rotor 200.

[0191] It should be understood that the positional relationship referred to in "front and rear sides" can be based on the extension direction of the turbine unit 2 shaft system. In the embodiment shown in the figure, it can be based on the extension direction of the center line M.

[0192] For example, if we consider the first rotor 100 as the front rotor and the second rotor 200 as the rear rotor along the extension direction of the center line M, then the diameter of the rear adjacent pair of wheels on the front rotor can be understood as the diameter of the second pair of wheels 2082. Similarly, the diameter of the front adjacent pair of wheels on the rear rotor can be understood as the diameter of the second pair of wheels 2082.

[0193] Since the measurement positions are set corresponding to the bearings, the elevation change of adjacent measurement positions on the front and rear sides of each rotor can be understood as the elevation change of the respective bearings 2071, 2072, 2073, and 2074. The distance between adjacent measurement positions on the front and rear sides of each rotor can be understood as the distance from the first bearing 2071 to the second bearing 2072 (i.e., L1 in Figure 8), and the distance from the third bearing 2073 to the fourth bearing 2074 (i.e., L2 in Figure 8).

[0194] In the embodiment shown in Figure 8, the measurement position corresponding to the first bearing 2071 is defined as the calibration point, and the elevation change at the first bearing 2071 can be regarded as zero.

[0195] In some embodiments, the planar deviation between two adjacent rotors in step S412 can be obtained using Formula 1:

[0196] Formula 1

[0197] in, This refers to the planar deviation between the two rotors. In the aforementioned example, it is also the planar deviation between the first rotor 100 and the second rotor 200.

[0198] This represents the initial planar deviation between the two rotors.

[0199] This represents the elevation change of the adjacent measurement positions on the front side of the front rotor. In the aforementioned example, it is also the elevation change at the location of the first bearing 2071.

[0200] This refers to the diameter of the adjacent pair of wheels on the rear side of the front rotor. In the aforementioned example, it is also the diameter of the second pair of wheels 2082.

[0201] This refers to the distance between adjacent measurement positions on the front and rear sides of the front rotor. In the aforementioned example, it is the distance between the first bearing 2071 and the second bearing 2072.

[0202] This represents the elevation change at the adjacent measurement position on the rear side of the front rotor. In the aforementioned example, it is also the elevation change at the location of the second bearing 2072.

[0203] This represents the elevation change at the adjacent measurement position on the front side of the rear rotor. In the aforementioned example, it is also the elevation change at the location of the third bearing 2073.

[0204] This refers to the diameter of the adjacent pair of wheels on the front side of the rear rotor. In the aforementioned example, it is also the diameter of the second pair of wheels 2082.

[0205] This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor. In the aforementioned example, it is the distance between the third bearing 2073 and the fourth bearing 2074.

[0206] This represents the elevation change at the adjacent measurement location on the rear side of the rear rotor. In the aforementioned example, it is also the elevation change at the location of the fourth bearing 2074.

[0207] It is important to understand the initial planar deviation between two adjacent rotors. This can be understood as the planar deviation between adjacent rotors after the last adjustment of the turbine unit's shaft center, or as the target planar deviation to be achieved during the current adjustment. Its value can be zero or non-zero; no specific limitation is made here.

[0208] As shown in Figure 16, in some embodiments, step S42 may include:

[0209] Step S421: Based on the elevation change at multiple measurement locations, the position data at multiple measurement locations, and the position data of each pair of rotors in the turbine unit 2, obtain the elevation change at the adjacent measurement locations on the front and rear sides of each rotor, the distance between the adjacent measurement locations on the front and rear sides of each rotor, the distance from the adjacent measurement location on the rear side of the front rotor to the adjacent pair of rotors on the rear side, and the distance from the adjacent measurement location on the front side of the rear rotor to the adjacent pair of rotors on the front side.

[0210] Step S422: Based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear wheel, and the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front wheel, obtain the circumferential deviation of the two adjacent rotors.

[0211] The following explanation of step S42 will continue using the example shown in Figure 8:

[0212] In the embodiment shown in Figure 8, the distance between adjacent measurement positions on the front and rear sides of each rotor can be understood as the distance from the first bearing 2071 to the second bearing 2072 (i.e., L1 in Figure 8), and the distance from the third bearing 2073 to the fourth bearing 2074 (i.e., L2 in Figure 8). The distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear pair of wheels can be understood as the distance from the second bearing 2072 to the second pair of wheels 2082 (i.e., L122 in Figure 8). The distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front pair of wheels can be understood as the distance from the third bearing 2073 to the second pair of wheels 2082 (i.e., L211 in Figure 8). The elevation change of adjacent measurement positions on the front and rear sides of each rotor can be understood as the elevation change of the respective positions of the first bearing 2071, the second bearing 2072, the third bearing 2073, and the fourth bearing 2074.

[0213] In some embodiments, the circumferential deviation between two adjacent rotors in step S422 can be obtained using formula two:

[0214] Formula 2

[0215] in, This refers to the circumferential deviation between the two rotors. In the aforementioned example, it is the circumferential deviation between the first rotor 100 and the second rotor 200.

[0216] This represents the initial circumferential deviation between the two rotors.

[0217] This represents the elevation change of the adjacent measurement positions on the front side of the front rotor. In the aforementioned example, it is also the elevation change at the location of the first bearing 2071.

[0218] This is the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent pair of wheels on the rear side. In the aforementioned example, this is also the distance from the second bearing 2072 to the second pair of wheels 2082.

[0219] This refers to the distance between adjacent measurement positions on the front and rear sides of the front rotor. In the aforementioned example, it is the distance between the first bearing 2071 and the second bearing 2072.

[0220] This represents the elevation change at the adjacent measurement position on the rear side of the front rotor. In the aforementioned example, it is also the elevation change at the location of the second bearing 2072.

[0221] This represents the elevation change at the adjacent measurement position on the front side of the rear rotor. In the aforementioned example, it is also the elevation change at the location of the third bearing 2073.

[0222] This is the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent pair of front wheels. In the aforementioned example, it is also the distance from the third bearing 2073 to the second pair of wheels 2082.

[0223] This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor. In the aforementioned example, it is the distance between the third bearing 2073 and the fourth bearing 2074.

[0224] This represents the elevation change at the adjacent measurement location on the rear side of the rear rotor. In the aforementioned example, it is also the elevation change at the location of the fourth bearing 2074.

[0225] It is important to understand that this refers to the initial circumferential deviation between two adjacent rotors. This can be understood as the circumferential deviation between adjacent rotors after the last adjustment of the turbine unit's shaft center, or as the target circumferential deviation to be achieved during the current adjustment. Its value can be zero or non-zero; no specific limitation is made here.

[0226] It should be understood that, apart from the elevation change measured in step S3, all other distance values, diameter values, etc., are values ​​that the turbine unit 2 has at the factory and can be obtained directly, and are not specifically limited here.

[0227] In the turbine unit 2 shown in Figures 1 to 3, there are four sets of adjacent rotors: the rotor of the high-pressure cylinder 202 and the rotor of the first low-pressure cylinder 203, the rotor of the first low-pressure cylinder 203 and the rotor of the second low-pressure cylinder 204, the rotor of the second low-pressure cylinder 204 and the rotor of the generator 205, and the rotor of the generator 205 and the rotor of the exciter 206. By obtaining the planar deviation and circumferential deviation of each set of adjacent rotors in sequence according to the above steps, the shaft center deviation of the turbine unit 2 can be obtained.

[0228] The present application will be further illustrated below through a specific embodiment:

[0229] In turbine unit 2 shown in Figure 1, the relevant distances and diameters of each rotor are shown in Table 1:

[0230] Table 1

[0231]

[0232] If the measurement position corresponding to the bearing 207 on the front side of the rotor of the high-pressure cylinder 202 is set as the calibration point, then the elevation changes at each measurement position obtained through steps S1 to S3 are shown in Table 2:

[0233] Table 2

[0234]

[0235] In this specific embodiment, it is assumed that there is no initial center deviation (which can also be understood as the expectation that there will be no deviation after adjustment). The initial deviations between adjacent rotors are shown in Table 3:

[0236] Table 3

[0237]

[0238] Using the above data, the center deviation between adjacent rotors can be obtained through step S4, as shown in Table 4:

[0239] Table 4

[0240]

[0241] The planar deviations and circumferential deviations between adjacent rotors obtained in Table 4 together constitute the shaft center deviation of turbine unit 2 shown in Figure 1.

[0242] The shaft center deviation shown in the measured diagram can be eliminated or reduced by adjusting the bearing 207 and / or support spring 210 in turbine unit 2, thus achieving shaft center adjustment without disassembling the coupling 208.

[0243] Subsequently, using relevant techniques, the couplings 208 between each rotor were disassembled, and dial indicators or gauge blocks were installed on the disassembled couplings 208. By rotating the rotor 208, the data of the coupling 208 was measured every 90° to verify the measurement method constructed in this application. The final results obtained met the error requirements of the results obtained in this application. The method constructed in this application was applied during overhaul, and the results met the accuracy requirements, achieving the need for accurate measurement, and the application effect was good.

[0244] It is understood that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that, for those skilled in the art, without departing from the concept of this application, the above technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this application. Therefore, all equivalent transformations and modifications made within the scope of the claims of this application should fall within the coverage of the claims of this application.

Claims

1. A method for measuring the center deviation of a turbine generator shaft system, characterized in that, include: Multiple measurement locations were selected along the turbine shaft system on the foundation platform of the turbine unit; The settlement monitoring system is installed on the aforementioned foundation platform; Obtain the elevation change at each of the measurement locations during the measurement period; The shaft center deviation of the turbine unit is obtained based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the size and position data of each pair of wheels in the turbine unit.

2. The method for measuring the center deviation of the turbine shaft system according to claim 1, characterized in that, The settlement monitoring system includes multiple settlement testing mechanisms and at least one connecting mechanism, wherein each settlement testing mechanism forms a test chamber for containing test liquid; The installation of the settlement monitoring system on the foundation platform includes: Adjust the flatness of the base platform at each of the measurement positions to a first preset range; At least one of the aforementioned settlement testing mechanisms shall be installed at each of the aforementioned measurement locations; The test chambers of two adjacent settlement testing mechanisms are connected by a connecting mechanism.

3. The method for measuring the center deviation of the turbine shaft system according to claim 2, characterized in that, Adjusting the flatness of the base platform at each of the measurement positions to a first preset range includes: The surface of the base platform at each of the measurement positions is polished so that the flatness of the base platform at each of the measurement positions is within the first preset range.

4. The method for measuring the center deviation of the turbine shaft system according to claim 2, characterized in that, The installation of at least one settlement testing mechanism at each of the aforementioned measurement locations includes: Adjust the absolute elevation of each of the measurement positions so that the difference between the absolute elevations of any two measurement positions is within a second preset range; At least one settlement testing mechanism is installed at each of the aforementioned measurement locations after the absolute elevation has been adjusted.

5. The method for measuring the center deviation of the turbine shaft system according to claim 2, characterized in that, After the step of installing the settlement monitoring system on the foundation platform, and before the step of obtaining the elevation changes at each of the measurement locations during the measurement period, the method further includes: The settlement monitoring system was filled with water and vented.

6. The method for measuring the center deviation of the turbine shaft system according to claim 5, characterized in that, The connecting mechanism includes an air pipe and a water pipe. The air pipe is used to connect the test chambers of two adjacent sedimentation testing mechanisms, and the water pipe is used to connect the test chambers of two adjacent sedimentation testing mechanisms. The process of filling and venting the settlement monitoring system includes: Seal the air pipes between any two adjacent sedimentation testing units; The settlement monitoring system is connected to a water source so that water is supplied to the settlement monitoring system through the water source and the gas in the water pipe is discharged. Disconnect the settlement monitoring system from the water source to stop the water from being supplied to the settlement monitoring system, and remove the blockage between each pair of adjacent settlement testing units.

7. The method for measuring the center deviation of the turbine shaft system according to claim 2, characterized in that, The acquisition of the elevation change at each measurement location during the measurement time period includes: At the initial moment of the measurement time period, the first liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations is obtained; At the end of the measurement time period, the second liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained; The elevation change at each measurement location during the measurement period is obtained by using the first liquid level value and the second liquid level value at each measurement location.

8. The method for measuring the center deviation of the turbine shaft system according to claim 7, characterized in that, The measurement positions are set one-to-one with the bearings of the turbine unit; each measurement position includes two measurement points, which are symmetrically distributed on both sides of the bearing, and the line connecting the two measurement points is perpendicular to the center line of the bearing; a settlement testing mechanism is installed at each measurement point. The step of acquiring the first liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations at the initial moment of the measurement time period includes: At the beginning of the measurement time period, the third liquid level value in the test chamber of the sedimentation testing mechanism at two measurement points of each measurement location is obtained; by averaging the third liquid level values ​​at the two measurement points, the first liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained. At the end of the measurement time period, obtaining the second liquid level value in the test chamber of the sedimentation testing mechanism at each of the measurement locations includes: At the end of the measurement time period, the fourth liquid level value in the test chamber of the sedimentation testing mechanism at two measurement points of each measurement location is obtained; by averaging the fourth liquid level values ​​at the two measurement points, the second liquid level value in the test chamber of the sedimentation testing mechanism at each measurement location is obtained.

9. The method for measuring the center deviation of the turbine shaft system according to any one of claims 1-8, characterized in that, The step of obtaining the shaft center deviation of the turbine unit based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the size and position data of each pair of wheels in the turbine unit includes: Based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the dimensional data of each pair of rotors in the turbine unit, the planar deviation between each adjacent rotor in the turbine unit is obtained respectively. Based on the elevation changes at the multiple measurement locations, the position data at the multiple measurement locations, and the position data of each pair of rotors in the turbine unit, the circumferential deviation between each adjacent rotor in the turbine unit is obtained respectively. The turbine shaft center deviation is formed by combining the planar deviation between adjacent rotors and the circumferential deviation between adjacent rotors.

10. The method for measuring the center deviation of the turbine shaft system according to claim 9, characterized in that, The step of obtaining the planar deviation between adjacent rotors in the turbine unit based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the dimensional data of each pair of rotors in the turbine unit includes: Based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the dimensions of each pair of wheels in the turbine unit, the elevation changes of the adjacent measurement locations on the front and rear sides of each rotor in two adjacent rotors, the distance between the adjacent measurement locations on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor are obtained respectively. The planar deviation of the two adjacent rotors is obtained based on the elevation change of the adjacent measurement positions on the front and rear sides of each rotor, the distance between the adjacent measurement positions on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor.

11. The method for measuring the center deviation of the turbine shaft system according to claim 10, characterized in that, The step of obtaining the planar deviation of two adjacent rotors based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the diameter of the adjacent pair of wheels on the rear side of the front rotor, and the diameter of the adjacent pair of wheels on the front side of the rear rotor includes: The planar deviation between the two adjacent rotors is obtained according to Formula 1; Formula 1 in, This refers to the planar deviation between the two rotors; This represents the initial planar deviation between the two rotors; This represents the elevation change of adjacent measurement positions on the front side of the front rotor; It is the diameter of the adjacent pair of wheels on the rear side of the front rotor; This is the distance between adjacent measurement positions on the front and rear sides of the front rotor; This represents the elevation change of adjacent measurement positions on the rear side of the front rotor. This represents the elevation change of adjacent measurement positions on the front side of the rear rotor; The diameter of the adjacent pair of wheels on the front side of the rear rotor; This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor. This represents the elevation change of the adjacent measurement position on the rear side of the rear rotor.

12. The method for measuring the center deviation of the turbine shaft system according to claim 9, characterized in that, The step of obtaining the circumferential deviation between adjacent rotors in the turbine unit based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the position data of each pair of rotors in the turbine unit includes: Based on the elevation changes at the multiple measurement locations, the position data of the multiple measurement locations, and the position data of each pair of turbines in the turbine unit, the elevation changes of the adjacent measurement locations on the front and rear sides of each rotor in two adjacent rotors, the distance between the adjacent measurement locations on the front and rear sides of each rotor, the distance from the adjacent measurement location on the rear side of the front rotor to the adjacent pair of turbines on the rear side, and the distance from the adjacent measurement location on the front side of the rear rotor to the adjacent pair of turbines on the front side are obtained respectively. The circumferential deviation of the two adjacent rotors is obtained by measuring the elevation change of the adjacent measurement positions on the front and rear sides of each rotor, the distance between the adjacent measurement positions on the front and rear sides of each rotor, the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear wheel, and the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front wheel.

13. The method for measuring the center deviation of the turbine shaft system according to claim 12, characterized in that, The step of obtaining the circumferential deviation of two adjacent rotors based on the elevation change of adjacent measurement positions on the front and rear sides of each rotor, the distance between adjacent measurement positions on the front and rear sides of each rotor, the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent rear wheel, and the distance from the adjacent measurement position on the front side of the rear rotor to the adjacent front wheel, includes: The circumferential deviation between the two adjacent rotors is obtained according to Formula 2; Formula 2 in, This refers to the circumferential deviation between the two rotors; This represents the initial circumferential deviation between the two rotors; This represents the elevation change of adjacent measurement positions on the front side of the front rotor; This is the distance from the adjacent measurement position on the rear side of the front rotor to the adjacent pair of wheels on the rear side; This is the distance between adjacent measurement positions on the front and rear sides of the front rotor; This represents the elevation change of adjacent measurement positions on the rear side of the front rotor. This represents the elevation change of adjacent measurement positions on the front side of the rear rotor; The distance from the adjacent measurement position on the front side of the rear rotor to the adjacent pair of front wheels; This refers to the distance between adjacent measurement positions on the front and rear sides of the rear rotor. This represents the elevation change of the adjacent measurement position on the rear side of the rear rotor.

14. The method for measuring the center deviation of the turbine shaft system according to any one of claims 1-8, characterized in that, The measurement positions are set one-to-one with the bearings of the turbine unit, and the line connecting the measurement position and the corresponding bearing is perpendicular to the center line of the bearing.

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