Coaxiality regulation model of multi-stage rotor stack assembly, high-speed rotation equipment coaxiality stacking method

Abstract

The coaxiality regulation model of multi-stage rotor stack assembly, and the coaxiality stack method of high-speed rotating equipment relate to the technical field of precision assembly of large high-speed rotating equipment. The problem of increasing failure rate of large high-speed rotating equipment caused by the coaxiality out-of-tolerance after assembly is solved. The coaxiality regulation model establishment method is as follows: the center position vector of each stage rotor after assembly is obtained according to the machining error data of each stage rotor and the error transmission relationship of directional and positioning error in the rotor assembly process; the existing coordinate system is converted, the center position vector of each stage rotor is reference transformed on the basis of the new coordinate system; and the coaxiality prediction model of multi-stage rotor assembly is established; according to the coaxiality prediction model of multi-stage rotor assembly, the coaxiality regulation model of multi-stage rotor stack assembly is established. According to the regulation model, the coaxiality stack assembly is guided. The present application is suitable for the assembly of large high-speed rotating equipment.

Description

Technical Field

[0001] This invention relates to the field of precision assembly technology for large-scale high-speed rotating equipment. Background Technology

[0002] Many large high-speed rotary equipment pieces are composed of multi-stage rotor assemblies, and the accuracy of these assemblies significantly impacts their performance. The coaxiality of the assembled multi-stage rotors is a crucial parameter for evaluating the assembly quality of such equipment; deviations in coaxiality directly affect the clearance between the rotor and the stator casing. During operation, excessive coaxiality leads to severe vibrations, causing internal scraping between the rotor and stator casing, and consequently increasing the failure rate. Therefore, reducing coaxiality errors after multi-stage rotor assembly is vital for suppressing vibrations and lowering the failure rate of such equipment. Establishing a coaxiality prediction model for multi-stage rotor stacking assemblies can enable assembly process control, avoiding the problem of repeated disassembly and reassembly due to coaxiality errors. While existing coaxiality prediction models for multi-stage rotor stacking assemblies can predict coaxiality errors, they lack consideration of the actual assembly process, thus limiting their reliability in guiding assembly. Summary of the Invention

[0003] This invention provides a coaxiality control model for multi-stage rotor stacking assembly. The coaxiality control model is used to control the assembly process and solve the problem that the coaxiality exceeds the tolerance after assembly of large high-speed rotary equipment, which leads to an increase in the failure rate of large high-speed rotary equipment.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A method for establishing a coaxiality control model for multi-stage rotor stacking assembly, the method being as follows:

[0006] S1. Measure the machining error of each stage of the rotor to obtain the machining error data of each stage of the rotor;

[0007] S2. Establish the error propagation relationship between orientation and positioning errors during rotor assembly;

[0008] S3. Based on the machining error data of each stage rotor and the error propagation relationship of orientation and positioning errors during rotor assembly, obtain the center position vector of each stage rotor after assembly.

[0009] S4. Perform coordinate transformation on the existing coordinate system to obtain a new coordinate system;

[0010] S5. Establish the reference transformation matrix;

[0011] S6. Based on the new coordinate system and the reference transformation matrix, the center position vector of each stage rotor after assembly is transformed by the reference to obtain the center position vector of each stage rotor after the reference transformation.

[0012] S7. Based on the reference transformation, transform the center position vector of each stage rotor to establish a coaxiality prediction model after multi-stage rotor assembly.

[0013] S8. Based on the coaxiality prediction model after multi-stage rotor assembly, a coaxiality control model for multi-stage rotor stacking assembly is established with the installation phase of each stage rotor as the independent variable.

[0014] Furthermore, in a preferred embodiment, the error propagation relationship between orientation and positioning errors during the rotor assembly process in step S2 above is expressed as follows:

[0015]

[0016] Among them, S xi Rotate the i-th stage rotor reference plane about the X-axis by θ xi The rotation matrix of the angle, S yi Rotate the i-th stage rotor reference plane about the Y-axis by θ yi The rotation matrix of the angle, p i Let dp be the ideal position vector of the center of the radial measurement surface of the i-th stage rotor. i Let S be the machining error vector of the center position of the radial measurement surface of the i-th stage rotor. r For the i-th stage rotor to rotate about the Z-axis by θ ri The rotation matrix of the angle, S ri It is an identity matrix.

[0017] Furthermore, in a preferred embodiment, the center position vector of each stage rotor after assembly in step S3 above is represented as:

[0018]

[0019] Among them, dx 0-n The cumulative eccentricity error of the center of the measuring surface of the nth stage rotor in the X-axis direction after assembly is represented by dy. 0-n The cumulative eccentricity error of the center of the measuring surface of the nth stage rotor in the Y-axis direction after assembly is dz. 0-n Sx represents the axial error of the center of the measuring surface of the nth stage rotor in the Z-axis direction after assembly. j-1 Sy j-1 and Sr j-1 Rotate the j-1 stage rotor reference plane about the X, Y, and Z axes by θx j-1 ,θy j-1 and θz j-1 Rotation matrix of angle, pi Let dp be the ideal position vector of the center of the radial measurement surface of the i-th stage rotor. i Let be the machining error vector of the center position of the radial measurement surface of the i-th stage rotor.

[0020] Furthermore, in a preferred embodiment, the specific steps of step S4 described above are as follows:

[0021] The line connecting the centers of the end faces at both ends of the multi-stage rotor is used as the actual axis for evaluating coaxiality, and a new coordinate system OX′Y′Z′ is established with the actual axis as the X′ axis.

[0022] Furthermore, in a preferred embodiment, the reference transformation matrix in step S5 above is represented as:

[0023]

[0024] Where: l is the direction vector of the rotation axis, w is the unit vector of the direction vector of the rotation axis, and θ is the rotation angle.

[0025] Furthermore, in a preferred embodiment, the center position vector of each stage of the rotor in the reference transformation of step S6 above is represented as:

[0026]

[0027] Furthermore, in a preferred embodiment, the coaxiality prediction model after multi-stage rotor assembly in step S7 above is expressed as follows:

[0028]

[0029] Furthermore, in a preferred embodiment, the coaxiality control model for the multi-stage rotor stacking assembly in step S8 above is expressed as follows:

[0030]

[0031] Where, dx′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the X-axis direction after angular measurement, dy′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the Y-axis direction after the angle is measured.

[0032] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor performs the method described in any of the preceding descriptions.

[0033] A method for coaxiality stacking of large high-speed rotary equipment based on reference transformation, wherein the method uses a coaxiality control model of multi-stage rotor stacking assembly obtained by the above method to control the assembly process.

[0034] The beneficial effects of this invention are as follows: This invention provides a coaxiality control model for multi-stage rotor stacking assembly. By using the coaxiality control model to control the assembly process, the problem of excessive coaxiality after assembly of large high-speed rotary equipment is solved, which leads to an increase in the failure rate of large high-speed rotary equipment.

[0035] Compared with existing technologies, it has the following advantages:

[0036] 1. Existing large-scale high-speed rotary equipment is composed of multi-stage rotor assemblies. The coaxiality of the assembled multi-stage rotors is a crucial parameter for evaluating the assembly quality of large-scale high-speed rotary equipment. Excessive coaxiality directly affects the clearance between the rotor and the stator casing. When the large-scale high-speed rotary equipment is operating, excessive coaxiality leads to severe vibration, causing internal scraping between the rotor and the stator casing, thus significantly increasing the failure rate. This invention provides a coaxiality control model for multi-stage rotor stacking assembly. This model is used for assembly process control, solving the problem of increased failure rates caused by excessive coaxiality after assembly in large-scale high-speed rotary equipment.

[0037] 2. Existing coaxiality prediction models for multi-stage rotor stacking assembly can predict the coaxiality error after multi-stage rotor assembly, but due to the lack of consideration for the actual assembly process, they lack a certain degree of realism in guiding assembly. This invention provides a coaxiality control model for multi-stage rotor stacking assembly. This coaxiality control model considers the pose transformation from the ideal reference to the actual reference, and then uses the coaxiality control model for assembly process control, thus possessing scientific validity.

[0038] This invention is applicable to the assembly of large-scale high-speed rotating equipment. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating the method for establishing a coaxiality control model for a multi-stage rotor stacked assembly as described in Embodiment 1.

[0040] Figure 2 This is a schematic diagram of the reference transformation described in Implementation Method 5;

[0041] Figure 3 This is a schematic diagram of the coaxiality adjustment model described in Implementation Method 8.

[0042] Wherein: Actual Rotation axis is the actual rotation axis, and Reference axis is the reference axis. Detailed Implementation

[0043] Implementation Method 1. See [link / reference] Figure 1 This embodiment describes a method for establishing a coaxiality control model for a multi-stage rotor stacked assembly. The method is as follows:

[0044] S1. Measure the machining error of each stage of the rotor to obtain the machining error data of each stage of the rotor;

[0045] S2. Establish the error propagation relationship between orientation and positioning errors during rotor assembly;

[0046] S3. Based on the machining error data of each stage rotor and the error propagation relationship of orientation and positioning errors during rotor assembly, obtain the center position vector of each stage rotor after assembly.

[0047] S4. Perform coordinate transformation on the existing coordinate system to obtain a new coordinate system;

[0048] S5. Establish the reference transformation matrix;

[0049] S6. Based on the new coordinate system and the reference transformation matrix, the center position vector of each stage rotor after assembly is transformed by the reference to obtain the center position vector of each stage rotor after the reference transformation.

[0050] S7. Based on the reference transformation, transform the center position vector of each stage rotor to establish a coaxiality prediction model after multi-stage rotor assembly.

[0051] S8. Based on the coaxiality prediction model after multi-stage rotor assembly, a coaxiality control model for multi-stage rotor stacking assembly is established with the installation phase of each stage rotor as the independent variable.

[0052] In practical application, this implementation first measures the machining error of each rotor stage to obtain machining error data for each stage. It then establishes the error propagation relationship between orientation and positioning errors during rotor assembly. Based on the machining error data for each rotor stage and the error propagation relationship between orientation and positioning errors during rotor assembly, it obtains the center position vector of each rotor stage after assembly. Next, it transforms the existing coordinate system to obtain a new coordinate system and establishes a reference transformation matrix. Based on the new coordinate system, it performs a reference transformation on the center position vector of each rotor stage after assembly to obtain... The reference transformation is used to determine the center position vector of each rotor stage. Based on this, and using the ISO standard definition of coaxiality, a coaxiality prediction model for multi-stage rotor assembly is established. Then, using the installation phase of each rotor stage as the independent variable, a coaxiality control model for multi-stage rotor stacking assembly is established. This model is used to control the assembly process, addressing the problem of excessive coaxiality after assembly in large high-speed rotary equipment, which leads to an increased failure rate.

[0053] Existing large-scale high-speed rotary equipment is composed of multi-stage rotor assemblies. The coaxiality of the assembled multi-stage rotors is a crucial parameter for evaluating the assembly quality of large-scale high-speed rotary equipment. Excessive coaxiality directly affects the clearance between the rotor and the stator casing. When the large-scale high-speed rotary equipment is operating, excessive coaxiality leads to severe vibration, causing internal scraping between the rotor and the stator casing, thus significantly increasing the failure rate. This embodiment provides a coaxiality control model for multi-stage rotor stacking assembly. This model is used for assembly process control, solving the problem of increased failure rates caused by excessive coaxiality after assembly in large-scale high-speed rotary equipment.

[0054] Implementation Method 2. This implementation method illustrates the error propagation relationship of orientation and positioning errors in step S2 of the coaxiality control model establishment method for multi-stage rotor stacking assembly described in Implementation Method 1. The error propagation relationship of orientation and positioning errors in the rotor assembly process is expressed as follows:

[0055]

[0056] Among them, S xi Rotate the i-th stage rotor reference plane about the X-axis by θ xi The rotation matrix of the angle, S yi Rotate the i-th stage rotor reference plane about the Y-axis by θ yi The rotation matrix of the angle, p i Let dp be the ideal position vector of the center of the radial measurement surface of the i-th stage rotor.i Let S be the machining error vector of the center position of the radial measurement surface of the i-th stage rotor. r For the i-th stage rotor to rotate about the Z-axis by θ ri The rotation matrix of the angle, S ri It is an identity matrix.

[0057] In practical applications, this implementation establishes the error propagation relationship between orientation and positioning errors during rotor assembly. The rotor assembly coaxiality error is obtained by the cumulative amplification of orientation and positioning errors of each stage of rotor. Therefore, it is necessary to know the propagation mechanism of orientation and positioning errors of each stage of rotor. By adopting the error propagation relationship of orientation and positioning errors, the influence of the form and position errors of each stage of rotor on the final assembly coaxiality result can be obtained. The rotor can be adjusted according to the error propagation relationship to finally obtain the assembly phase with the minimum assembly coaxiality, thus guiding the actual assembly.

[0058] Implementation Method 3. This implementation method illustrates the example of the center position vector of each rotor stage after assembly in step S3 of the method for establishing a coaxiality control model for multi-stage rotor stacking assembly described in Implementation Method 1. The center position vector of each rotor stage after assembly in step S3 is expressed as follows:

[0059]

[0060] Among them, dx 0-n The cumulative eccentricity error of the center of the measuring surface of the nth stage rotor in the X-axis direction after assembly is represented by dy. 0-n The cumulative eccentricity error of the center of the measuring surface of the nth stage rotor in the Y-axis direction after assembly is dz. 0-n Sx represents the axial error of the center of the measuring surface of the nth stage rotor in the Z-axis direction after assembly. j-1 Sy j-1 and Sr j-1 Rotate the j-1 stage rotor reference plane about the X, Y, and Z axes by θx j-1 ,θy j-1 and θz j-1 Rotation matrix of angle, p i Let dp be the ideal position vector of the center of the radial measurement surface of the i-th stage rotor. i Let be the machining error vector of the center position of the radial measurement surface of the i-th stage rotor.

[0061] This implementation method obtains the center position vector of each stage of the rotor after assembly based on the machining error data of each stage and the error propagation relationship of orientation and positioning errors during rotor assembly. Coaxiality is the maximum deviation between the center of each rotor and the reference axis. Therefore, it is necessary to obtain the center position of each stage of the rotor, and then obtain the maximum distance by comparing the distance from the center of each stage to the axis. This distance is the coaxiality that needs to be evaluated and calculated.

[0062] Implementation Method 4. This implementation method illustrates step S4 in the method for establishing a coaxiality control model for a multi-stage rotor stacking assembly as described in Implementation Method 1. Step S4 is specifically represented as follows:

[0063] The line connecting the centers of the end faces at both ends of the multi-stage rotor is used as the actual axis for evaluating coaxiality, and a new coordinate system OX′Y′Z′ is established with the actual axis as the X′ axis.

[0064] In practical applications, this implementation requires converting the existing coordinate system to a new one. Using traditional stacking methods, the reference axis for calculating coaxiality is the ideal rotation axis, i.e., the Z-axis of the coordinate system centered on the center of the lower end face of the first-stage rotor. However, during the operation of an aero-engine, the actual rotation axis is the line connecting the center of the lower end face of the first-stage rotor and the center of the upper end face of the highest-stage rotor. Therefore, it is necessary to consider the pose transformation from the actual reference to the ideal reference based on the original stacking model. The coaxiality obtained according to the actual reference is closer to the actual coaxiality during actual operation.

[0065] Implementation Method 5. See also Figure 2 This embodiment illustrates the reference transformation matrix in step S5 of the method for establishing a coaxiality control model for a multi-stage rotor stacked assembly as described in Embodiment 1. The reference transformation matrix in step S5 is expressed as follows:

[0066]

[0067] In practical applications, the reference axis for calculating coaxiality using traditional stacking methods is an ideal axis of rotation, specifically the Z-axis of a coordinate system centered at point O on the lower end face of the first-stage rotor. However, during the operation of an aero-engine, the actual axis of rotation is centered at the centers O on the lower end face of the first-stage rotor and the upper end face of the highest-stage rotor. nA Connect the lines. For example... Figure 2 As shown, therefore, based on the original stacked model, it is necessary to consider the pose transformation from the ideal reference to the actual reference to obtain the coordinates of the centroid of each rotor in the coordinate system OX′Y′Z′. The coordinate system OX′Y′Z′ can be regarded as the coordinate system OXYZ being obtained by rotating θ around the rotation axis where the origin O is located. Let the rotation axis direction vector l be (lx, ly, lz). T The unit vector of this vector The center O of the upper end face of the highest grade rotor nA The position vector in the coordinate system OXYZ with the ideal reference as the Z-axis is P(O nAx O nAy O nAz ) TIn a coordinate system OX′Y′Z′ with the actual reference as the Z-axis, the position vector can be represented as Q(0,0,O). nAz ') T Then the rotation axis direction vector l and the rotation angle θ are:

[0068]

[0069]

[0070] The reference transformation matrix can be obtained from the direction vector l and the rotation angle θ.

[0071] Existing coaxiality prediction models for multi-stage rotor stacking assemblies can predict the coaxiality error after assembly, but they lack realism in guiding assembly due to the lack of consideration for the actual assembly process. This embodiment provides a coaxiality control model for multi-stage rotor stacking assemblies. This model considers the pose transformation from an ideal reference to an actual reference, and then uses the model to control the assembly process, thus possessing scientific validity.

[0072] Implementation Method Six. This implementation method illustrates step S6 of the method for establishing a coaxiality control model for multi-stage rotor stacking assembly described in Implementation Method One by using the reference transformation of the center position vector of each stage rotor as an example. The center position vector of each stage rotor is expressed as follows:

[0073]

[0074] In practical applications, this embodiment uses a new coordinate system to transform the center position vector of each stage rotor after assembly to obtain the transformed center position vector of each stage rotor.

[0075] Implementation Method Seven. This implementation method illustrates, for example, the coaxiality prediction model after multi-stage rotor assembly in step S7 of the coaxiality stacking method for large high-speed rotating equipment based on reference transformation described in Implementation Method One. The coaxiality prediction model after multi-stage rotor assembly is expressed as follows:

[0076]

[0077] This implementation method transforms the center position vector of each stage of the rotor based on the aforementioned reference to establish a coaxiality prediction model after multi-stage rotor assembly.

[0078] Implementation method eight. See also Figure 3This embodiment illustrates, in step S8 of the method for establishing a coaxiality control model for a multi-stage rotor stacked assembly as described in Embodiment 1, the coaxiality control model of which is represented as follows:

[0079]

[0080] Where, dx′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the X-axis direction after angular measurement, dy′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the Y-axis direction after the angle is measured.

[0081] The coaxiality control model for multi-stage rotor stacking assembly described in this embodiment is based on the coaxiality prediction model after multi-stage rotor assembly, with the installation phase of each stage rotor as the independent variable, to establish the coaxiality control model for multi-stage rotor stacking assembly.

[0082] Implementation Method Nine. This implementation method provides a computer device, which includes a memory and a processor. The memory stores a computer program. When the processor runs the computer program stored in the memory, the processor executes the method described in any one of Implementation Methods One to Eight.

[0083] Implementation Method 10. This implementation method provides a coaxiality stacking method for large high-speed rotary equipment based on reference transformation. The method uses the coaxiality control model of multi-stage rotor stacking assembly obtained by any one of the methods in Implementation Methods 1 to 8 to control the assembly process.

[0084] Existing large-scale high-speed rotary equipment is composed of multi-stage rotor assemblies. The coaxiality of the assembled multi-stage rotors is a crucial parameter for evaluating the assembly quality of large-scale high-speed rotary equipment. Excessive coaxiality directly affects the clearance between the rotor and the stator casing. When the large-scale high-speed rotary equipment is operating, excessive coaxiality leads to severe vibration, causing internal scraping between the rotor and the stator casing, thus significantly increasing the failure rate. This embodiment provides a coaxiality stacking method for large-scale high-speed rotary equipment based on reference transformation. This method utilizes the coaxiality control model of the multi-stage rotor stacking assembly obtained by the method described in any one of embodiments one to eight to control the assembly process, solving the problem of increased failure rate caused by excessive coaxiality after assembly of large-scale high-speed rotary equipment.

[0085] The above description is merely an embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for establishing a coaxiality control model for multi-stage rotor stacking assembly, characterized in that, The method is as follows: S1. Measure the machining error of each stage of the rotor to obtain the machining error data of each stage of the rotor; S2. Establish the error propagation relationship between orientation and positioning errors during rotor assembly; S3. Based on the machining error data of each stage rotor and the error propagation relationship of orientation and positioning errors during rotor assembly, obtain the center position vector of each stage rotor after assembly. The center position vector of each stage rotor after assembly in step S3 is represented as follows: in, For the first assembly n The cumulative eccentricity error of the center of the measuring surface of the stage rotor in the X-axis direction. For the first assembly n The cumulative eccentricity error of the center of the measuring surface of the stage rotor in the Y-axis direction. For the first assembly n The axial error of the center of the measuring surface of the stage rotor in the Z-axis direction. , and For the first j- The first-stage rotor reference plane rotates about the X, Y, and Z axes. , and Rotation matrix of angle, For the first i The ideal position vector of the center of the radial measurement surface of the stage rotor. For the first i The machining error vector of the center position of the radial measurement surface of the stage rotor; S4. Perform coordinate transformation on the existing coordinate system to obtain a new coordinate system; S5. Establish the reference transformation matrix; The reference transformation matrix in step S5 is expressed as follows: Where: l is the direction vector of the rotation axis. w The unit vector is the direction vector of the rotation axis. θ The rotation angle; S6. Based on the new coordinate system and the reference transformation matrix, the center position vector of each stage rotor after assembly is transformed by the reference to obtain the center position vector of each stage rotor after the reference transformation. The reference transformation in step S6 is represented by the center position vector of each rotor stage as follows: S7. Based on the reference transformation, transform the center position vector of each stage rotor to establish a coaxiality prediction model after multi-stage rotor assembly. S8. Based on the coaxiality prediction model after multi-stage rotor assembly, a coaxiality control model for multi-stage rotor stacking assembly is established with the installation phase of each stage rotor as the independent variable.

2. The method for establishing a coaxiality control model for multi-stage rotor stacking assembly according to claim 1, characterized in that, The error propagation relationship between orientation and positioning errors during rotor assembly in step S2 is expressed as follows: Among them, S xi Rotate the i-th stage rotor reference plane about the X-axis by θ xi The rotation matrix of the angle, S yi For the first i Rotation θ of the stage rotor reference plane around the Y-axis yi The rotation matrix of the angle, p i Let dp be the ideal position vector of the center of the radial measurement surface of the i-th stage rotor. i Let S be the machining error vector of the center position of the radial measurement surface of the i-th stage rotor. r For the i-th stage rotor to rotate about the Z-axis by θ ri The rotation matrix of the angle, S ri It is an identity matrix.

3. The method for establishing a coaxiality control model for a multi-stage rotor stacked assembly according to claim 1, characterized in that, The specific steps of step S4 are as follows: The line connecting the centers of the end faces at both ends of the multi-stage rotor is used as the actual axis for evaluating coaxiality, and a new coordinate system OX′Y′Z′ is established with the actual axis as the X′ axis.

4. The method for establishing a coaxiality control model for a multi-stage rotor stacked assembly according to claim 1, characterized in that, The coaxiality prediction model after multi-stage rotor assembly in step S7 is expressed as follows: 。 5. The method for establishing a coaxiality control model for a multi-stage rotor stacked assembly according to claim 1, characterized in that, The coaxiality adjustment model for the multi-stage rotor stacking assembly in step S8 is expressed as follows: Where, dx′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the X-axis direction after angular measurement, dy′ 0-i (θ ri ( ) represents the rotation θ of the i-th stage rotor around the Z-axis after the n-stage rotor is assembled. ri The cumulative eccentricity error of the center of the measured surface in the Y-axis direction after the angle is measured.

6. A computer device comprising a memory and a processor, characterized in that, The memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor performs the method described in any one of claims 1-5.

7. A method for coaxiality stacking of large high-speed rotating equipment based on reference transformation, characterized in that, The method described above utilizes the coaxiality control model of a multi-stage rotor stack assembly obtained by the method described in any one of claims 1-5 to control the assembly process.

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