CN-115656534-B - Unbalanced quantity stacking method for large-scale high-speed rotation equipment based on reference transformation

CN115656534BCN 115656534 BCN115656534 BCN 115656534BCN-115656534-B

Abstract

A method for stacking unbalance of large-scale high-speed rotary equipment based on reference transformation relates to the technical field of precision equipment assembly. The method comprises the steps of measuring data parameters of each level of rotor disk, analyzing transfer rules of blade mass centers and blade disk mass centers to obtain a mass center transfer model matrix, obtaining mass center sizes of blade centers and blade disk mass centers according to the mass center transfer model matrix, obtaining unbalance amounts of disk separation rotors containing single-layer blades according to the data parameters of each level of rotor disk, the mass center sizes of the blade centers and the mass center sizes of the blade disks, projecting the unbalance amounts to A, B correction surfaces to obtain vectors of unbalance excitation amounts at A and B positions, establishing a reference transformation model, and obtaining a turning equipment unbalance amount regulation model according to the reference transformation model. The problem of the unbalance that the large-scale high-speed gyration equipment at all levels produced after the rotor assembly at all levels, and then lead to the gyration equipment to break down is solved. The invention is suitable for the precise assembly of large-scale high-speed rotary equipment.

Inventors

LIU YONGMENG
ZHANG YUAN
SUN CHUANZHI
TAN JIUBIN

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260505
Application Date: 20220926

Claims (7)

1. The unbalanced quantity stacking method of the large-scale high-speed rotary equipment based on reference transformation is characterized by comprising the following steps of: s1, measuring the size parameters, the quality, the initial unbalance amount, the machining error, the assembly error and the quality of each blade of each stage of rotor; s2, analyzing the transfer rule of the mass centers of the blades and the blade disc to obtain mass center transfer model matrixes of each stage of rotor disc and each stage of blade of each stage of rotor in the multistage disc separation rotor; The centroid transfer model matrix in step S2 is expressed as: Wherein: as a transfer matrix from the origin O to the i-th stage blisk centroid M Di , For the centroid transfer matrix between two locations O i-1 and O i within the leaf disk, A rotation transmission matrix about a coordinate axis in a coordinate system centered at a position O i , in which rotation about an X-axis is represented by Rx, rotation about a Y-axis is represented by Ry, For the rotation transmission matrix of the rotation around the Z axis of the ith stage rotor coordinate system centered at the center O i-1 of the ith-1 stage rotor mating surface, For a position vector pointing from position E to position F, R (m-1)x is the rotational component of the m-1 st stage rotor tilt error about the X axis at mating face center O t(m-1) , R (m-1)y is the rotational component of the m-1 st stage rotor tilt error about the Y axis at mating face center O t(m-1) , R m is the m-th stage rotor system rotational matrix vector, rotates about axis Z, A transmission matrix from the origin O to a kth blade centroid M Bijk of a jth cross section of the ith rotor; s3, obtaining the mass center of the leaf center according to the mass center transfer model matrix And the centroid size of the blisk ; S4, obtaining unbalance of the disk separation rotor with single-layer blades according to the size parameters, the quality, the initial unbalance, the machining error and the assembly error of the rotor disks at each level, the quality of each blade, the mass center of the blade center and the mass center of the disk ; Unbalance amount in the step S4 Expressed as: Wherein m Bijk is the mass of the kth blade of the jth section of the ith rotor, m Di is the mass of the ith blade disc, n ij is the total number of the blades of the jth section of the ith rotor, For the centroid size of the ith stage blisk, The mass center size of the kth blade of the jth layer of the ith rotor; S5, projecting the unbalance quantity Q i to A, B correction surfaces to obtain vectors of unbalance excitation quantities at the positions A and B; S6, establishing a reference transformation model A; The reference transformation model a in the step S6 is expressed as: Wherein l is a rotation axis direction vector, w is a unit vector of the rotation axis direction vector, and θ is a rotation angle; And S7, obtaining a rotating equipment unbalance amount regulation model according to the reference transformation model.
2. The method for stacking unbalance of large-scale high-speed rotating equipment based on reference transformation according to claim 1, wherein the mass center of the leaf center in the step S3 is Expressed as: Wherein the method comprises the steps of Is that The component in the X-direction is, Is that A component in the Y direction.
3. The method for stacking unbalance of large-scale high-speed rotating equipment based on reference transformation according to claim 1, wherein the mass center of the impeller in the step S3 is larger than the mass center of the impeller Expressed as: 。
4. The method for stacking unbalance amounts of large-scale high-speed slewing equipment based on reference transformation according to claim 1, wherein the vector of the unbalance excitation amount at the a position in the step S5 is expressed as: Wherein Z B is the coordinate of the correction surface B on the Z axis of the coordinate system, Z A is the coordinate of the correction surface A on the Z axis of the coordinate system, and Z i is the coordinate of the ith rotor section on the Z axis of the coordinate system.
5. The method for stacking unbalance amounts of large-scale high-speed slewing equipment based on reference transformation according to claim 1, wherein the vector of the unbalance excitation amount at the B position in the step S5 is expressed as: Wherein Z B is the coordinate of the correction surface B on the Z axis of the coordinate system, Z A is the coordinate of the correction surface A on the Z axis of the coordinate system, and Z i is the coordinate of the ith rotor section on the Z axis of the coordinate system.
6. The method for stacking unbalance of large-scale high-speed slewing equipment based on reference transformation according to claim 1, wherein the slewing equipment unbalance regulation model in the step S7 is expressed as: Wherein Q Ax 、Q Ay and Q Az are components in the X, Y, Z axis direction of the unbalance amount projected onto the correction surface A when the reference transformation is not considered, Q ́ Ax 、Q´ Ay and Q ́ Az are components in the X, Y, Z axis direction of the unbalance amount projected onto the correction surface A when the reference transformation is considered, Q Bx 、Q By and Q Bz are components in the X, Y, Z axis direction of the unbalance amount projected onto the correction surface B when the reference transformation is not considered, and Q ́ Bx 、Q´ By and Q ́ Bz are components in the X, Y, Z axis direction of the unbalance amount projected onto the correction surface B when the reference transformation is considered.
7. A computer device comprising a memory and a processor, wherein the memory has stored therein a computer program which, when executed by the processor, performs the method of any of claims 1-6.

Description

Unbalanced quantity stacking method for large-scale high-speed rotation equipment based on reference transformation Technical field The invention relates to the technical field of precision equipment assembly, in particular to the technical field of precision assembly of large-scale high-speed rotary equipment. Background Many large-scale high-speed rotation equipment is assembled by multistage rotor, and the high-low level of assembly precision has crucial influence on performance of large-scale high-speed rotation equipment. The unbalance amount of the large-scale high-speed rotation equipment after the assembly of each level of rotors is an important parameter for measuring the assembly quality of the large-scale high-speed rotation equipment, and the serious vibration of the large-scale high-speed rotation equipment during working is caused by the large unbalance of each level of rotors, so that faults are caused. In addition, the unbalance amount can generate larger radial force to cause abrasion of the bearing, the service life of the bearing is reduced, and meanwhile, moment can also be generated to cause bending of the rotation axis. Therefore, the rotor unbalance amount of the multistage rotor after assembly is reduced, and the multistage rotor has remarkable effects of inhibiting the vibration of large-scale high-speed rotary equipment and prolonging the service life of the large-scale high-speed rotary equipment. The unbalanced quantity transmission model of the multi-stage rotor stacking assembly is established, the function of guiding the assembly can be realized, and the problem that the unbalanced quantity of each stage of rotor is overlarge and the rotor is repeatedly disassembled and assembled after the multi-stage rotor is assembled is avoided. The existing unbalance amount prediction model for multi-stage rotor stacking assembly can realize the prediction of the unbalance amount of each stage of rotor after multi-stage rotor assembly, but lacks a certain authenticity for guiding assembly due to the lack of consideration of the actual assembly process. The invention comprises the following steps: The invention provides a reference transformation-based unbalanced quantity stacking method for large-scale high-speed rotary equipment, which solves the problem that the rotary equipment is out of order due to unbalance generated after all levels of rotors of the large-scale high-speed rotary equipment are assembled. In order to achieve the above object, the present invention provides the following solutions: A method for stacking unbalance of large-scale high-speed rotary equipment based on reference transformation comprises the following steps: s1, measuring the size parameters, the quality, the initial unbalance amount, the machining error, the assembly error and the quality of each blade of each stage of rotor; s2, analyzing the transfer rule of the mass centers of the blades and the blade disc to obtain mass center transfer model matrixes of each stage of rotor disc and each stage of blade of each stage of rotor in the multistage disc separation rotor; s3, obtaining the mass center of the leaf center according to the mass center transfer model matrix And the centroid size of the blisk S4, obtaining unbalance quantity Q i of a disc separation rotor containing single-layer blades according to the size parameters, quality, initial unbalance quantity, machining errors and assembly errors of each rotor blade, the mass center of a blade center and the mass center of the blade disc of each rotor stage; S5, projecting the unbalance quantity Q i to A, B correction surfaces to obtain vectors of unbalance excitation quantities at the positions A and B; S6, establishing a reference transformation model A; And S7, obtaining a rotating equipment unbalance amount regulation model according to the reference transformation model. Further, in a preferred embodiment, the centroid transfer model matrix in the step S2 is expressed as: Wherein: as a transfer matrix from the origin O to the i-th stage blisk centroid M Di, For the centroid transfer matrix between two locations O i-1 and O i within the leaf disk,A rotation transmission matrix about a coordinate axis with a coordinate system centered at a position O i, wherein rotation about an X axis is represented by Rx, rotation about a Y axis is represented by Ry, T iR is a rotation transmission matrix about a Z axis with an ith rotor coordinate system centered at an ith rotor-1 mating surface center O i-1, P E-F is a position vector directed from a position E to a position F, R (m-1)x is a rotation component about an X axis of an mth rotor-1 rotor-tilt error at a mating surface center O t(m-1), R (m-1)y is a rotation component about a Y axis of an mth rotor-1 rotor-tilt error at a mating surface center O t(m-1), R m is an mth rotor system rotation matrix vector, and rotation about an axis Z,Is a transfer matrix from the origin O to the kth blade centroid M Bijk