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CN-122020894-A - Method for quickly aligning rotor shaft system of steam turbine and accurately calculating adjustment quantity

CN122020894ACN 122020894 ACN122020894 ACN 122020894ACN-122020894-A

Abstract

The application relates to a method for quickly aligning and accurately calculating adjustment quantity of a steam turbine rotor shaft system, which comprises the steps of obtaining static geometrical parameters of the shaft system, constructing a dynamic calculation model based on a linkage formula set, calculating circumferential variation quantity and opening variation quantity of front and rear pairs of wheels in real time by taking vertical displacement quantity of a bearing bush as an input variable, feeding back numerical values of each parameter and differences between the numerical values and target values of the parameters in real time through a visual interface, and guiding a user to iteratively adjust the displacement quantity of the bearing bush based on the feedback differences until all parameters meet alignment precision standards. The application realizes multi-parameter coupling synchronous resolving and real-time visual guiding, solves the problems of low efficiency, dependence on experience and high rework rate of the traditional method, remarkably improves the adjustment precision and the operation efficiency, and reduces the technical threshold.

Inventors

  • LIAO ZHONGHUI
  • LI XILIANG
  • DENG JIN
  • QIU MINJUN
  • HUANG SHUWEN
  • WANG WU
  • WANG SIQI
  • LIU MINGYANG
  • Zheng Chenshun
  • CAI ZEFENG
  • LUO XUEPING
  • LIAO FUJIAN
  • ZHOU YANPENG
  • Zeng Yueneng
  • ZHANG LANSONG
  • LI CUNYI
  • CHEN SHAOMIN
  • LI ZHIPING
  • CHENG YUNIAN
  • YI DAWEI
  • DENG DACHUN
  • ZHOU WEIGUANG
  • YANG LIANG
  • JIANG HAIBO

Assignees

  • 广东拓奇电力技术发展有限公司

Dates

Publication Date
20260512
Application Date
20260127

Claims (10)

  1. 1. A turbine rotor shaft system rapid alignment and adjustment accurate calculation method is characterized by comprising the following steps: S101, acquiring static geometric parameters of a steam turbine shafting; s102, constructing a dynamic calculation model based on the static geometric parameters, wherein the dynamic calculation model takes the vertical displacement of the bearing bush as a unique input variable and outputs a plurality of associated opposite wheel state variable quantities; s103, receiving an adjustment quantity which is input by a user and aims at the vertical displacement quantity of the bearing bush; S104, inputting the adjustment quantity into the dynamic calculation model, and calculating and updating the plurality of associated pair-wheel state change quantities in real time; s105, resolving the updated parameter values and the differences between the updated parameter values and the corresponding preset target values, and feeding back the updated parameter values to a user in real time in a visual mode; and S106, guiding a user to iteratively adjust and verify the vertical displacement of the bearing bush based on the feedback difference until all parameters meet the preset alignment precision standard.
  2. 2. The method for quickly aligning and accurately calculating the adjustment quantity of the rotor shaft system of the steam turbine according to claim 1, wherein the static geometrical parameters are obtained by scanning and modeling the shaft system through a three-dimensional laser scanning technology.
  3. 3. The method for quickly aligning and accurately calculating the adjustment quantity of the rotor shaft system of the steam turbine according to claim 2, wherein the method is characterized in that point cloud data are obtained through three-dimensional laser scanning, a three-dimensional model is obtained through processing, and the bearing bush distance and the wheel diameter parameter are extracted from the three-dimensional model.
  4. 4. The method for quickly aligning and accurately calculating the adjustment quantity of the rotor shaft system of the steam turbine according to claim 1, wherein the visual feedback is that an adjustment quantity input control is provided through a left side panel in the same graphical interface, and the updated value and the difference state of the change quantity of the circumference and the opening of the pair of wheels are dynamically displayed on a right side panel.
  5. 5. The method for precisely calculating the quick alignment and adjustment quantity of the rotor shaft system of the steam turbine according to claim 4, wherein the difference states are distinguished by color labeling of different parameters, namely, up-to-standard, approaching to a target and not up-to-standard, respectively.
  6. 6. The method for quickly aligning and accurately calculating the adjustment amount of the rotor shaft system of the steam turbine according to claim 1, wherein in S106, when the parameters are not up to standard, the adjustment direction and the recommended adjustment amount for the vertical displacement amount of the bearing bush are automatically calculated and prompted based on the current difference, so as to guide the user to perform the next round of operation.
  7. 7. The method for precisely calculating the quick alignment and adjustment of the rotor shaft system of a steam turbine according to claim 6, wherein the recommended adjustment is calculated by identifying the parameter with the largest current deviation and combining the historical adjustment record.
  8. 8. The method for quickly aligning and accurately calculating the adjustment quantity of the rotor shaft system of the steam turbine according to claim 1, wherein in the real-time resolving process of S104, if the calculated change quantity value exceeds a preset threshold value, an automatic calibration mechanism is triggered, and the calibrated value is used for feedback and iteration.
  9. 9. The method for quickly aligning and accurately calculating the adjustment quantity of the rotor shaft system of the steam turbine according to claim 1, wherein the preset alignment accuracy standard is that the end face deviation is less than or equal to 0.02mm and the circumference deviation is less than or equal to 0.03mm.
  10. 10. The method for rapidly aligning and accurately calculating an adjustment amount of a rotor shaft of a steam turbine according to claim 1, further comprising recording input data, a resolving result, a difference state and a final adjustment scheme of each iterative adjustment, and obtaining a traceable operation report including a complete adjustment path.

Description

Method for quickly aligning rotor shaft system of steam turbine and accurately calculating adjustment quantity Technical Field The application relates to the technical field of electric digital data, in particular to a method for quickly aligning a rotor shaft system of a steam turbine and accurately calculating an adjustment amount. Background At present, a traditional manual calculation mode based on experience and basic mechanics principle is commonly adopted in the industry, a technician manually measures basic parameters such as bearing bush distance, wheel diameter and the like according to a similar triangle theory and gradually and independently calculates single adjustment parameters; The prior art has the defects that the pure manual calculation flow is complicated, usually requires several hours to days from calculation to verification, and severely occupies the critical overhaul period; the manual calculation is easy to be overlooked, the coupling influence among multiple parameters is difficult to be synchronously processed, the shafting alignment reworking rate is up to 15% -20%, the operation quality is excessively dependent on the recessive experience of the senior technicians, the unified standard and specification are lacking, the new person culture period is long, the calculation process and the result are in a static mode, the parameter change trend cannot be observed in real time in the adjustment process, and the trial-and-error cost is high; The invention realizes the realization of tool assistance to experience-dependent decision reduction by constructing a dynamic calculation algorithm of a linkage formula group, integrating a real-time visual feedback module and introducing a closed-loop real-time decision support and visual guidance mechanism verification process based on dynamic calculation. Disclosure of Invention In order to solve the problems in the prior art, the application aims to provide a method for quickly aligning a rotor shaft system of a steam turbine and accurately calculating an adjustment amount. The application relates to a method for quickly aligning and accurately calculating an adjustment quantity of a steam turbine rotor shaft system, which comprises the following steps: s101, acquiring static geometric parameters of a steam turbine shafting, wherein the static geometric parameters at least comprise a distance (L2) from a front bearing bush to a front pair of wheels, a distance (L3) between the front and rear pairs of wheels, a distance (L1) from a rear pair of wheels to a rear bearing bush, a front pair of wheel diameter (Dq) and a rear pair of wheel diameter (Dh); S102, constructing a dynamic calculation model of shafting adjustment parameters based on static geometric parameters, wherein the dynamic calculation model is a linkage formula group and is used for dynamically calculating and outputting front-pair wheel circumference variation (R2), rear-pair wheel circumference variation (R3), front-pair wheel opening variation (A1) and rear-pair wheel opening variation (A2) by taking a bearing bush vertical displacement (R1) as an input variable; s103, receiving an adjustment quantity which is input by a user and aims at the vertical displacement quantity (R1) of the bearing bush; S104, substituting the adjustment quantity into a dynamic calculation model, and calculating and updating in real time to obtain corresponding numerical values of a front pair of wheel circumference change quantity (R2), a rear pair of wheel circumference change quantity (R3), a front pair of wheel opening change quantity (A1) and a rear pair of wheel opening change quantity (A2); S105, resolving the updated values of the vertical displacement amount (R1), the front wheel circumference change amount (R2), the rear wheel circumference change amount (R3), the front wheel opening change amount (A1) and the rear wheel opening change amount (A2) of the bearing bush in the step S104, feeding back to a user in a visual mode in real time, and simultaneously displaying the difference between each parameter and a preset target value; And S106, guiding the user to execute the steps S103 to S105 again based on the difference fed back in the step S105, and iteratively adjusting and verifying the vertical displacement (R1) of the axle bush until all adjustment parameters meet the preset alignment precision standard. Further, in S101, position data of front and rear bearing bushes and a counter wheel of a turbine shafting are collected through a sensor, a preliminary position relation is obtained through a high-precision positioning technology, a distance between each part is calculated and geometrically processed, an accurate distance result is obtained, a counter wheel diameter calibration size is measured by combining optical scanning, a static geometric model is built by integrating distance and diameter data, a complete parameter set is obtained, when the parameter exceeds a threshold value, ab