Method and device for adjusting and calculating guide bearing clearance of vertical water-turbine generator set

Abstract

The invention provides a vertical water-turbine generator set guide bearing clearance adjustment calculation method and device, and relates to the technical field of bearing control, and the method comprises the steps: setting an azimuth angle in a coordinate system, selecting a center point from a main shaft, and marking a turning point; obtaining a guide bearing net throw corresponding to each turning point, a cosine value of an azimuth angle corresponding to the turning point and a sine value of the azimuth angle corresponding to the turning point, and calculating a one-time frequency X component and a one-time frequency Y component of a turning throw curve; and acquiring the central azimuth angle of the guide bearing bush and the total design clearance of the bearing, and calculating the adjustable clearance of each bearing bush of the guide bearing in combination with the first frequency multiplication X component and the first frequency multiplication Y component of the turning throw curve. The to-be-adjusted clearances of all the bearing bushes of the guide bearing are calculated according to the center azimuth angles of the bearing bushes of the guide bearing, the total design clearance of the bearing and the first-harmonic-generation X component and the first-harmonic-generation Y component of the turning throw curve, precise adjustment of the bearing bush clearances is achieved, unstable unit operation caused by too large bearing bush clearances is avoided, and the unit operation stability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bearing control, and in particular to a method and device for calculating the clearance adjustment of a guide bearing of a vertical hydro-turbine generator set. Background Art

[0002] The function of the guide bearing of a vertical hydro-turbine generator set is to bear the radial unbalanced force of the rotating part of the unit and maintain the stable operation of the main shaft of the unit within the bearing clearance range. The guide bearing of a vertical hydro-turbine generator set generally adopts a block bearing structure. In order to prevent the main shaft from being blocked during rotation, the basic principle for adjusting the clearance of the block bearing guide bearing is that the center of all guide bearings is on the rotation center line of the main shaft, and each guide bearing is concentric. The total clearance of each guide bearing is specified by the design, and the distribution of the single-side clearance during installation is adjusted based on the actual position of the main shaft as the measurement reference.

[0003] Currently, the calculation accuracy of the gap is poor and the efficiency is low, which will lead to unstable operation of the unit. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, the first purpose of the present application is to propose a calculation method for adjusting the clearance of the guide bearing of a vertical hydro-turbine generator set.

[0006] The second object of the present application is to provide a device.

[0007] The third objective of the present application is to provide an electronic device.

[0008] A fourth objective of the present application is to provide a computer-readable storage medium.

[0009] A fifth object of the present application is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for calculating the adjustment of the clearance of the guide bearing of a vertical hydro-turbine generator set, comprising:

[0011] Set up a coordinate system, set the azimuth in the coordinate system, select a center point from the main axis and mark the turning point;

[0012] Obtain the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculate the X component and Y component of the turning swing curve at the first frequency;

[0013] The central azimuth angle of the guide bearing bushing and the total design clearance of the bearing are obtained, and the clearance to be adjusted for each bushing of the guide bearing is calculated in combination with the first-order frequency X component and Y component of the turning gear swing curve.

[0014] Optionally, setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point from the main axis and marking a turning point, includes:

[0015] The center of the unit is taken as the coordinate origin, the upstream direction is the +Y direction, and the right-hand direction facing upstream is the +X direction;

[0016] A position on the main shaft close to the guide bearing is selected as the center point, and the turning points are marked in a counterclockwise direction from the center point with the positive direction of the X-axis as the starting point, wherein the distances between two adjacent turning points are equal.

[0017] Optionally, the calculation of the one-fold frequency X component and Y component of the turning gear swing curve includes:

[0018] The X component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the cosine value of the azimuth angle corresponding to the turning gear point. The formula is:

[0019]

[0020] in, is the X component of the turning gear swing curve, n is the turning gear point number, N is the total number of turning gear points, is the net swing of the guide bearing corresponding to the turning point n;

[0021] The Y component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the sine value of the azimuth angle corresponding to the turning gear point. The formula is:

[0022]

[0023] in, It is the Y component of the turning gear swing curve at one times the frequency.

[0024] Optionally, obtaining the central azimuth angle of the guide bearing bushing and the total design clearance of the bearing includes:

[0025] Taking the positive direction of the Y axis as the starting point, the guide bearing bushes are numbered in a clockwise direction;

[0026] The angle of the guide bearing bushing relative to the center position of the unit axis is obtained as the center azimuth angle.

[0027] Optionally, the formula for calculating the clearance that should be adjusted for each bearing bush of the guide bearing by combining the X component and Y component of the turning gear swing curve with the first frequency is:

[0028]

[0029] Where i is the number of the guide bearing bushing, I is the total number of guide bearing bushings, δ i is the clearance that should be adjusted for the guide bearing bush i, δ is the total clearance designed for the guide bearing, θi is the center azimuth angle of the guide bearing bush i.

[0030] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a vertical hydro-turbine generator set guide bearing clearance adjustment calculation device, comprising:

[0031] An initialization module for setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point from the main axis and marking a turning point;

[0032] The swing calculation module is used to obtain the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculate the X component and Y component of the turning swing curve at the first frequency;

[0033] The clearance calculation module is used to obtain the central azimuth angle of the guide bearing bushing and the total design clearance of the bearing, and calculate the clearance that should be adjusted for each bushing of the guide bearing in combination with the first-order frequency X component and Y component of the turning gear swing curve.

[0034] To achieve the above-mentioned purpose, the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0035] The memory stores computer-executable instructions;

[0036] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0037] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a computer-readable storage medium, in which computer-readable storage medium is stored computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the method as described in any one of the first aspects.

[0038] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, which implements any method in the first aspect when executed by a processor.

[0039] The present application provides a method, device, electronic device and storage medium for calculating the gap adjustment of the guide bearing of a vertical hydro-turbine generator set. By calculating the gaps to be adjusted for each guide bearing bush according to the central azimuth angle of the guide bearing bush, the total design gap of the bearing, and the X component and Y component of the first-octave frequency of the turning gear swing curve, the precise adjustment of the bush gap is achieved, and the instability of the unit operation caused by excessive bush gap is avoided, thereby improving the stability of the unit operation.

[0040] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0042] Figure 1 A schematic flow chart of a method for calculating the clearance adjustment of a guide bearing of a vertical hydro-turbine generator set provided in an embodiment of the present application;

[0043] Figure 2 A schematic structural diagram of a vertical hydro-turbine generator set guide bearing clearance adjustment calculation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0045] The function of the guide bearing of a vertical hydro-turbine generator set is to bear the radial unbalanced force of the rotating part of the unit and maintain the stable operation of the main shaft of the unit within the bearing clearance range. The guide bearing of a vertical hydro-turbine generator set generally adopts a block bearing structure. In order to prevent the main shaft from being blocked during rotation, the basic principle for adjusting the clearance of the block bearing guide bearing is that the center of all guide bearings is on the rotation center line of the main shaft, and each guide bearing is concentric. The total clearance of each guide bearing is specified by the design, and the distribution of the single-side clearance during installation is adjusted based on the actual position of the main shaft as the measurement reference.

[0046] When the main shaft is at the actual rotation center, the clearance of the limit bearing bushing is evenly adjusted according to the design value, and the clearance of other guide bearings is adjusted and distributed according to the direction and size of the main shaft's turning swing at that location. According to the "Technical Guidelines for Installation and Adjustment of Thrust Bearings and Guide Bearings of Hydro-Turbine Generator Sets (SL 668-2014)", the calculation formula for adjusting the clearance of the guide bearing bushing according to the turning swing is as follows:

[0047]

[0048] In the formula, δ i is the clearance that should be adjusted for the bearing, δ is the total clearance designed for the bearing, φ max is the maximum net swing at the bearing, α i It is the angle between the center of each bearing shell and the maximum net swing at the bearing.

[0049] Using the above formula, there are three steps to solve the required clearance of each bearing according to the turning gear swing data: first, the direction and size of the maximum net swing need to be calculated through the turning gear measurement data, and then the angle α between the center of each bearing and the maximum net swing is calculated.i , and finally solve the required clearance of each bearing. The calculation process of this method is complicated and it is not easy for beginners to master it. There are many intermediate variables, which is not conducive to computer programming. It is often calculated step by step by manual method, which is prone to calculation errors.

[0050] To address this problem, the present application provides a method for calculating the clearance adjustment of a guide bearing of a vertical hydro-turbine generator set. Figure 1 The present invention provides a flow chart of a method for calculating the gap adjustment of a guide bearing of a vertical hydro-turbine generator set. Figure 1 As shown, the method comprises the following steps:

[0051] Step 101, setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point from the main axis and marking a turning point;

[0052] Step 102, obtaining the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculating the X component and Y component of the turning swing curve at one times the frequency;

[0053] Step 103, obtaining the central azimuth angle of the guide bearing bushing and the total designed clearance of the bearing, and calculating the clearance to be adjusted for each bushing of the guide bearing in combination with the X component and Y component of the first-octave swing curve of the turning gear.

[0054] In this embodiment, the turning point and the bearing bush corresponding to the guide bearing are important components of the hydro-generator set, and they play a key role in the installation and operation of the set.

[0055] 1. Turning point: The turning point refers to a specific position on the shaft system of the hydro-turbine generator set used for turning (i.e. turning the unit to check the alignment and bending of the shaft system). According to the search results, the turning methods are divided into rigid turning and elastic turning. Rigid turning mainly holds the four lower guide bearings at a 90° angle to each other, while elastic turning simultaneously holds the four upper guide bearings and water guide bearings at a 90° angle to each other. The selection of the turning point is crucial to checking the bending of the shaft system connection, which can help determine the exact position and status of the unit axis.

[0056] 2. Bearing: The bearing is an important part of the guide bearing. It contacts the sliding rotor (shaft collar) and is a direct friction part. The bearing is generally forged with steel, and a tungsten gold (Babbitt alloy) layer is welded on the bearing surface to reduce friction and wear. The bearing is supported by the bearing seat and connected with a support screw. The middle part of the support screw is a nut, one end of which has a thread and is screwed into the bearing seat, and the other end supports the tray. The tray and the bearing are connected as a whole. The distance between the bearing and the bearing seat can be adjusted by rotating the nut. The layout of the bearing has an important impact on the stability and operating efficiency of the unit. Usually, the bearing is evenly distributed around the sliding rotor.

[0057] In summary, the turning point and bearing shell of the guide bearing are interrelated in the hydro-turbine generator set, but not one-to-one. The turning point is the specific position used for turning operation, and the bearing shell is the part of the guide bearing that directly contacts the shaft neck. Together, they ensure the correct installation and stable operation of the unit.

[0058] Optionally, the step 101 sets a coordinate system, sets an azimuth in the coordinate system, selects a center point from the main axis and marks a turning point, including:

[0059] The center of the unit is taken as the coordinate origin, the upstream direction is the +Y direction, and the right-hand direction facing upstream is the +X direction;

[0060] A position on the main shaft close to the guide bearing is selected as the center point, and the turning points are marked in a counterclockwise direction from the center point with the positive direction of the X-axis as the starting point, wherein the distances between two adjacent turning points are equal.

[0061] In this embodiment, when defining the azimuth angle, the +X direction is the starting angle, and the angle increases in the counterclockwise direction, that is, the +X direction is 0° and the +Y direction is 90°.

[0062] On the main shaft, near the guide bearing, with the +X direction as the starting point, mark N (N≥4) turning points at equal distances in the counterclockwise direction. The corresponding relationship between the turning points and the azimuth angles is shown in Table 1:

[0063]

[0064] Table 1

[0065] Optionally, the unit can be turned to calculate the net swing of the guide bearing. is the net swing of turning point No. 1, is the net swing of turning point n, and so on, the record table is shown in Table 2:

[0066]

[0067] Table 2

[0068] Optionally, the step 102 of calculating the X component and Y component of the turning gear swing curve at one times the frequency includes:

[0069] The X component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the cosine value of the azimuth angle corresponding to the turning gear point. The formula is:

[0070]

[0071] in, is the X component of the turning gear swing curve, n is the turning gear point number, N is the total number of turning gear points, is the net swing of the guide bearing corresponding to the turning point n;

[0072] The Y component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the sine value of the azimuth angle corresponding to the turning gear point. The formula is:

[0073]

[0074] in, It is the Y component of the turning gear swing curve at one times the frequency.

[0075] In this embodiment, in actual calculation, it is necessary to arrange the net swing of the guide bearing corresponding to each turning point in the order of the corresponding turning point number to form an array 1. Arrange the corresponding turning points in order of magnitude to form array 2. Arrange the corresponding turning points in order of magnitude to form array 3. That is:

[0076] Array 1=(φ1,φ2,…,φ n …φ N )

[0077]

[0078] When calculating the X component and Y component of the turning gear swing curve, the SUMPRODUCT() function is used to implement it, specifically:

[0079] φ x =SUMPRODUCT(array1,array2) / 4

[0080] φ y =SUMPRODUCT(array1,array3) / 4

[0081] The SUMPRODUCT() function is used to multiply corresponding elements in an array (or array area) and sum the products. This function is very flexible and can process one-dimensional or two-dimensional arrays, and can process multiple arrays at the same time. The outputs of the above two statements are the X component and Y component of the turning gear swing curve.

[0082] Optionally, the step 103 of obtaining the central azimuth angle of the guide bearing bushing and the total designed clearance of the bearing includes:

[0083] Taking the positive direction of the Y axis as the starting point, the guide bearing bushes are numbered in a clockwise direction;

[0084] The angle of the guide bearing bushing relative to the center position of the unit axis is obtained as the center azimuth angle.

[0085] In this embodiment, the central azimuth angle of the guide bearing bush refers to the angle of the bush relative to the central position of the unit axis. In mechanical engineering, the central azimuth angle of the bush is very important to ensure the correct installation of the bush and the stable operation of the unit. The central azimuth angle of the bush is usually used to determine the position of the bush relative to the journal to ensure that the bush can evenly support the journal, reduce wear and maintain the balance of the unit.

[0086] In the actual inspection and scraping process, the center azimuth of the bearing is also an important consideration. For example, when checking whether the bearing has shelling, cracks, hard spots, dense sand holes and other defects, it is necessary to check within the 60° to 70° angle of the center of the bearing to ensure that the distribution of the staining points on the surface of the bearing meets the requirements. This shows that the center azimuth of the bearing has a direct impact on the quality and performance of the bearing.

[0087] The number of bearings is I, the bearing number is i, and the bearing number is related to the azimuth angle θ of the bearing center. i The corresponding relationship is shown in Table 3:

[0088]

[0089] Table 3

[0090] Optionally, the formula for calculating the clearance that should be adjusted for each bearing bush of the guide bearing by combining the X component and Y component of the turning gear swing curve with the first frequency is:

[0091]

[0092] Where i is the number of the guide bearing bushing, I is the total number of guide bearing bushings, δ i is the clearance that should be adjusted for the guide bearing bush i, δ is the total clearance designed for the guide bearing, θ i is the center azimuth angle of the guide bearing bush i.

[0093] A. In actual operation, batch operation is performed using a program. The cosine and sine values ​​of the guide bearing bush azimuth angles need to form a matrix A. The cosine value is the first column, the sine value is the second column, and the bush number is the row number, that is:

[0094]

[0095] Take the X component of the turning gear swing curve at one times the frequency φ x And Y components form a column matrix B, that is:

[0096]

[0097] Call the MMULT() function, which is a function in Excel used to perform matrix multiplication of two arrays. It can be used to calculate the product of two matrices. The function statement is as follows:

[0098] Δ=δ / 2-MMULT(matrix A, matrix B) / 2

[0099] The statement outputs a column matrix Δ, the elements of which are the clearances that should be adjusted for each bearing shell of the guide bearing.

[0100] The invention provides a method for calculating the clearance adjustment of a vertical water turbine generator block bearing, which simplifies the calculation process and improves the working efficiency.

[0101] The calculation method provided by the present invention has clear principle, simple process and intuitive data, and can be easily mastered by beginners, thereby effectively avoiding the occurrence of calculation errors.

[0102] The calculation method provided by the present invention only includes two process parameters (i.e., the X component and the Y component of the first frequency of the turning gear swing curve), and the rest are known parameters. The function statement is called in, and the known parameters are input to output the calculation result. The calculation can be easily realized through computer programming.

[0103] In a possible embodiment, a certain hydro-turbine generator set is a semi-umbrella type three-guide bearing set with rigid support, and the lower guide is used as the limit bearing. During the maintenance, the unit is turned, the coordinate system is set according to step A, the azimuth is defined according to step B, and 8 turning points are marked at equal distances in the counterclockwise direction with the +X direction as the starting point according to step C, and the turning points are numbered. After the unit is turned, the axis inspection is qualified, the main shaft is at the actual rotation center, and the turning point No. 1 is at an azimuth of 0°. According to the turning measurement data, the net swing data of the water guide relative to the lower guide is shown in Table 4 (unit: 0.01mm):

[0104]

[0105] Table 4

[0106] There are 10 water-guide bearings in total, and the total design clearance of the bearings is δ=0.4mm. The clearance of the water-guide bearings is adjusted according to the swing of the turning gear.

[0107] A method for calculating the clearance adjustment of a guide bearing of a vertical hydro-turbine generator set is calculated using a formula, and the specific steps are as follows:

[0108] Step 201, Fourier decomposition is performed on the water guide swing curve, and the net swing data of the water guide in Table 1 is substituted into formula (2) and formula (3) to calculate the first-order frequency X component φ of the water guide swing curve x =8.83mm, Y component φ y =-2.65mm;

[0109] Specifically:

[0110] Assume that the net swing data of the water guide is array 1, the cosine value of the azimuth corresponding to the turning point is array 2, and the sine value of the azimuth corresponding to the turning point is array 3, that is:

[0111] Array 1 = (0, -4, -11, -16.5, -18, -13, -5, -1)

[0112] Array 2 = (1, 0.707, 0, -0.707, -1, -0.707, 0, 0.707)

[0113] Array 3 = (0, 0.707, 1, 0.707, 0, -0.707, -1, -0.707)

[0114] Enter array 1, array 2, and array 3 into the following function statements respectively:

[0115] φ x =SUMPRODUCT(array1,array2) / 4

[0116] φ y =SUMPRODUCT(array1,array3) / 4

[0117] Output X component φ x =8.83mm, Y component φ y =-2.65mm

[0118] Step 202: number the water-guided bearing bushings, and the bushing numbers are related to the azimuth angle θ. i The corresponding relationship is shown in Table 5:

[0119] Tile Number 1 2 3 4 5 6 7 8 9 10 <![CDATA[Azimuth angle / θ i > 90° 54° 18° 342° 306° 270° 234° 198° 162° 126°

[0120] Table 5

[0121] Step 203: convert the upper guide swing calculated in step 201 into a double frequency X component φ x =8.83mm, Y component φ y =-2.65mm, water guide bearing azimuth angle θ i Substitute the total design clearance of the bearing δ = 0.4 mm into formula (4) to calculate the clearance that should be adjusted for each bearing shell, which is:

[0122] The matrix A is composed of the cosine and sine values ​​of the guide bearing bushing azimuth angle, with the cosine value in the first column and the sine value in the second column, and the bushing number as the row number, that is:

[0123]

[0124] The calculated result φ x ,φ y Form the column matrix B:

[0125]

[0126] Input matrix A and matrix B into the excel function statement in step L, and output the column matrix Δ. The elements of the matrix are the clearances that should be adjusted for each bearing shell of the guide bearing:

[0127]

[0128] The clearances that should be adjusted for each bearing are shown in Table 6 (unit: 0.01mm):

[0129] Tile Number 1 2 3 4 5 6 7 8 9 10 Azimuth / 90° 54° 18° 342° 306° 270° 234° 198° 162° 126° <![CDATA[Adjustable gap / δ i > 21 18 16 15 16 19 22 24 25 24

[0130] Table 6

[0131] In order to implement the above-mentioned embodiment, the present application also proposes a guide bearing clearance adjustment calculation device for a vertical hydro-turbine generator set. Figure 2 The schematic diagram of the structure of a vertical hydro-turbine generator set guide bearing clearance adjustment calculation device provided in the embodiment of the present application. Figure 2 As shown, the device comprises:

[0132] Initialization module 210, for setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point from the main axis and marking a turning point;

[0133] The swing calculation module 220 is used to obtain the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculate the X component and Y component of the turning swing curve at one times the frequency;

[0134] The clearance calculation module 230 is used to obtain the central azimuth angle of the guide bearing bushing and the total design clearance of the bearing, and calculate the clearance that should be adjusted for each bushing of the guide bearing in combination with the X component and Y component of the first frequency of the turning gear swing curve.

[0135] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0136] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0137] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0138] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0139] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0140] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0141] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0142] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0143] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0144] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0145] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0146] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0147] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0148] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for calculating the clearance adjustment of a guide bearing of a vertical hydro-turbine generator set, characterized in that: The following steps are involved: Set up a coordinate system, set the azimuth in the coordinate system, select a center point from the main axis and mark the turning point; Obtain the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculate the X component and Y component of the turning swing curve at the first frequency; The central azimuth angle of the guide bearing bushing and the total design clearance of the bearing are obtained, and the clearance to be adjusted for each bushing of the guide bearing is calculated in combination with the first-order frequency X component and Y component of the turning gear swing curve.

2. The method according to claim 1, characterized in that The step of setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point on the main axis and marking a turning point includes: The center of the unit is taken as the coordinate origin, the upstream direction is the +Y direction, and the right-hand direction facing upstream is the +X direction; A position on the main shaft close to the guide bearing is selected as the center point, and the turning points are marked in a counterclockwise direction from the center point with the positive direction of the X-axis as the starting point, wherein the distances between two adjacent turning points are equal.

3. The method according to claim 2, characterized in that The calculation of the X component and Y component of the turning gear swing curve with one frequency doubling includes: The X component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the cosine value of the azimuth angle corresponding to the turning gear point. The formula is: in, is the X component of the turning gear swing curve, n is the turning gear point number, N is the total number of turning gear points, is the net swing of the guide bearing corresponding to the turning point n; The Y component of the one-fold frequency of the turning gear turning gear turning gear turning gear turning gear turning gear curve is determined according to the net swing of the guide bearing and the sine value of the azimuth angle corresponding to the turning gear point. The formula is: in, It is the Y component of the turning gear swing curve at one times the frequency.

4. The method according to claim 3, characterized in that The step of obtaining the central azimuth angle of the guide bearing bushing and the total designed clearance of the bearing comprises: Taking the positive direction of the Y axis as the starting point, the guide bearing bushes are numbered in a clockwise direction; The angle of the guide bearing bushing relative to the center position of the unit axis is obtained as the center azimuth angle.

5. The method according to claim 4, characterized in that The formula for calculating the clearance that should be adjusted for each bearing bush of the guide bearing by combining the X component and the Y component of the turning gear swing curve is: Where i is the number of the guide bearing bushing, I is the total number of guide bearing bushings, δ i is the clearance that should be adjusted for the guide bearing bush i, δ is the total clearance designed for the guide bearing, θ i is the center azimuth angle of the guide bearing bush i.

6. A vertical turbine generator set guide bearing clearance adjustment calculation device, characterized in that: include: An initialization module for setting a coordinate system, setting an azimuth in the coordinate system, selecting a center point from the main axis and marking a turning point; The swing calculation module is used to obtain the net swing of the guide bearing corresponding to each turning point, the cosine value of the azimuth angle corresponding to the turning point, and the sine value of the azimuth angle corresponding to the turning point, and calculate the X component and Y component of the turning swing curve at the first frequency; The clearance calculation module is used to obtain the central azimuth angle of the guide bearing bushing and the total design clearance of the bearing, and calculate the clearance that should be adjusted for each bushing of the guide bearing in combination with the first-order frequency X component and Y component of the turning gear swing curve.

7. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 5 when executed by a processor.

9. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 5 when being executed by a processor.

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