Adjusting method and system for unbalance amount of gas compressor rotor and storage medium

Abstract

The invention provides a method and system for adjusting the unbalance amount of a gas compressor rotor and a storage medium. The method for adjusting the unbalance amount of the gas compressor rotor comprises the steps that the assembly prediction result of the rotor and the mass center position of the mass center of each stage of rotor disc relative to the axis of the rotor are obtained; according to the assembly prediction result and the mass center position, the spigot unbalance amount of every two stages of rotor discs is obtained; according to the spigot unbalance amount, the adjusting mass of the adjusting piece is obtained; and the adjusting piece with the adjusting mass is arranged on a fastener at the mounting edge of the corresponding two-stage rotor disc. According to the adjusting method, the unbalance amount after the rotor is assembled can be reduced.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular to a method, system and storage medium for adjusting compressor rotor imbalance. Background Technology

[0002] The high-pressure compressor rotor of an aero-engine is composed of multiple rotor disks. Each rotor disk has undergone imbalance detection and correction before assembly. However, due to the influence of the concentricity and parallelism of the front and rear ends of each rotor disk, the axis of each rotor disk does not coincide with the final rotor axis during the assembly process.

[0003] However, multi-stage rotor disks using the stacking optimization method still generate significant imbalance after assembly. Furthermore, the axis of each stage rotor disk after assembly is not the same as the overall assembly axis, resulting in multi-order imbalance in the rotor vibration characteristics. Reducing the imbalance of each stage rotor disk relative to the overall rotor after assembly is a new direction for rotor balancing research. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, and storage medium for adjusting the imbalance of a compressor rotor, which can reduce the imbalance after rotor assembly.

[0005] One aspect of the present invention provides a method for adjusting the imbalance of a compressor rotor, the rotor comprising a multi-stage rotor disk connected in sequence; the adjustment method comprising: obtaining an assembly prediction result of the rotor and the position of the center of mass of each stage of the rotor disk relative to the axis of the rotor; obtaining the stop imbalance amount between every two stages of the rotor disk based on the assembly prediction result and the center of mass position; obtaining the adjustment mass of an adjusting member based on the stop imbalance amount; and installing the adjusting member having the adjustment mass onto fasteners at the mounting edges of the corresponding two stages of the rotor disk.

[0006] In one embodiment, obtaining the assembly prediction result of the rotor and the centroid position of each stage of the rotor disk relative to the axis of the rotor includes: obtaining the eccentricity vector of the axis of each stage of the rotor disk relative to the axis of the rotor; obtaining the centroid position of each stage of the rotor disk relative to the axis of the rotor; and obtaining the stop imbalance amount between every two stages of the rotor disk based on the assembly prediction result and the centroid position includes: obtaining the stop imbalance amount between every two stages of the rotor disk based on the eccentricity vector and the centroid position.

[0007] In one embodiment, obtaining the stop imbalance amount of each two stages of the rotor disks based on the eccentric vector and the centroid position includes: obtaining the front-stage centroid offset of the front-stage rotor disk and the rear-stage centroid offset of the rear-stage rotor disk based on the centroid position; and obtaining the stop imbalance amount of each two stages of the rotor disks based on the front-stage centroid offset, the rear-stage centroid offset, and the eccentric vector.

[0008] In one embodiment, based on the centroid position, the centroid offset of the preceding rotor disk and the centroid offset of the following rotor disk in the two stages of rotor disks are obtained, wherein the preceding centroid offset is obtained according to the following relationship:

[0009]

[0010] Where m1 is the centroid offset of the preceding stage, M1 is the mass of the preceding stage rotor disk, and l 11 l is the distance between the centroid of the preceding rotor disk along its axis and the front mounting edge. 12 The distance between the centroid of the pre-stage rotor disk and the rear mounting edge is the distance along the axis of the pre-stage rotor disk.

[0011] In one embodiment, based on the centroid position, the centroid offset of the preceding rotor disk and the centroid offset of the following rotor disk in the two stages of rotor disks are obtained, wherein the centroid offset of the following stage is obtained according to the following relationship:

[0012]

[0013] Where m2 is the centroid offset of the subsequent stage, M2 is the mass of the subsequent stage rotor disk, and l 21 l is the distance between the centroid of the rear rotor disk along its axis and the front mounting edge. 22 The distance between the centroid of the rear rotor disk and the rear mounting edge is the distance along the axis of the rear rotor disk.

[0014] In one embodiment, the stop imbalance of the rotor disk between every two stages is obtained based on the pre-stage centroid offset, the post-stage centroid offset, and the eccentricity vector, wherein the stop imbalance is obtained according to the following relationship:

[0015] P = ||m1·r + m2·r||

[0016] Wherein, P is the stop imbalance amount, and r is the eccentric vector.

[0017] In one embodiment, the adjustment mass of the adjusting member is obtained based on the unbalance of the stop, wherein the adjustment mass of the adjusting member is obtained according to the following relationship:

[0018]

[0019] Where m is the adjustment mass, and R is the pitch circle radius of the fastener at the mounting edge of the corresponding two-stage rotor disk.

[0020] In one embodiment, the fastener for installing the adjusting member with the adjusting mass at the mounting edge of the corresponding two-stage rotor disk includes: determining, based on the eccentric vector, the fasteners at the mounting edges of the corresponding two-stage rotor disks on which the adjusting member is to be installed, as the fasteners to be installed; and installing the adjusting member with the adjusting mass onto the fasteners to be installed.

[0021] Another aspect of the present invention provides a compressor rotor imbalance adjustment system, including a processor and a memory; the memory stores non-transitory computer instructions, which, when executed by the processor, perform the compressor rotor imbalance adjustment method described in any of the above embodiments.

[0022] Another aspect of the present invention provides a storage medium for storing non-transitory computer instructions, which, when executed, perform the compressor rotor imbalance adjustment method described in any of the above embodiments.

[0023] The compressor rotor imbalance adjustment method of the present invention, based on the rotor assembly prediction results, adjusts the assembly quality state between each two stages by adding corresponding adjustment components to the fasteners at the mounting edges of the two-stage rotor disks, thereby pre-adjusting the initial imbalance of the entire compressor rotor stage, reducing the imbalance after rotor assembly, achieving multi-section balance after the entire compressor rotor stage assembly, reducing high-order vibration of the rotor at high speeds, improving rotor assembly performance and quality, and increasing the first-time assembly pass rate of the engine. Attached Figure Description

[0024] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of the structure after the multi-stage engine rotor is assembled;

[0026] Figure 2 This is a schematic flowchart of an embodiment of the method for adjusting the unbalance of a compressor rotor according to the present invention;

[0027] Figure 3This is a schematic flowchart of another embodiment of the method for adjusting the unbalance of the compressor rotor according to the present invention;

[0028] Figure 4 yes Figure 1 A schematic diagram of the structure of the two-stage rotor disks assembled in the rotor. Detailed Implementation

[0029] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the invention and not to limit it. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the invention without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0030] As used herein, the term "axial" refers to the central axis of the rotor or rotor disk or a direction parallel to the central axis, the term "radial" refers to a direction perpendicular to the "axial" direction, and the term "circumferential" refers to a direction about the "axial" direction. The terms "front" and "rear" refer to the orientation of the compressor rotor 10 as determined by the direction of flight. Figure 1 and Figure 4 The left side is defined as the direction "forward", and the right side is positioned as "backward".

[0031] Figure 1 The assembled structure of a multi-stage engine rotor 10 is shown. The rotor 10 includes multi-stage rotor discs 12 and journals. The journals further include a front journal 11 and a rear journal (not shown). The connection between each stage of rotor disc 12, the front journal 11, and the rear journal is generally achieved through a fastener-stop assembly scheme. A typical assembly connection structure includes mounting edges, fasteners (not shown), and stops (not shown). The stop structure provides radial centering force between each stage of rotor disc 12, and the fasteners provide clamping force between the mounting boundary surfaces of the rotor discs 12. The stop structure and fasteners are located circumferentially on the rotor discs 12. There are multiple fasteners, spaced apart circumferentially on the rotor discs 12. The fasteners are bolts and nuts.

[0032] It is understood that not all adjacent rotor disks 12 are connected by the aforementioned fastener-stop structure. The two-stage rotor disks 12 in this invention are limited to adjacent rotor disks 12 connected by the fastener-stop structure.

[0033] Figure 2 An embodiment of the method for adjusting the imbalance of the compressor rotor 10 of the present invention is shown. The adjustment method includes steps S100 to S400:

[0034] In step S100, the assembly prediction results of rotor 10 and the centroid of each stage rotor disk 12 relative to the axis of rotor 10 are obtained (i.e., Figure 1 The centroid position of the rotor 10 axis AA is determined. The assembly prediction result of the rotor 10 is the stacking assembly result between the multi-stage rotor disks 12 and the journals obtained through a stacking optimization assembly method. This includes the eccentricity vector of the axis of each stage rotor disk 12 relative to the axis of the rotor 10, i.e., the eccentricity state of the mounting edge. The rotor 10 axis AA is the theoretical axis obtained through fitting. The centroid position can be measured using a centroid measuring instrument.

[0035] In step S200, the stop imbalance amount of each two-stage rotor disk 12 is obtained based on the assembly prediction results and the centroid position. Here, each two-stage rotor disk 12 refers to two adjacent rotor disks 12 connected by a fastener-stop structure, and the stop imbalance amount of the two rotor disks 12 is adjusted as a whole.

[0036] In step S300, the adjustment mass of the adjusting member (not shown) is obtained based on the stop imbalance amount.

[0037] In step S400, the adjusting element with adjusting mass is installed on the fastener at the mounting edge of the corresponding two-stage rotor disk 12. Considering that the rotor disks 12 are connected by the aforementioned fastener-stop structure, the adjusting element is selected as a washer. The washer can be fitted onto the bolt and tightened with a nut. The washer facilitates the initial adjustment of the imbalance and has high adjustment efficiency.

[0038] The method for adjusting the unbalance of the compressor rotor 10 of the present invention, based on the assembly prediction results of the rotor 10, adjusts the assembly quality state between each two stages by adding corresponding adjustment components to the fasteners at the mounting edges of the two-stage rotor disks 12, thereby pre-adjusting the initial unbalance of the entire stage of the compressor rotor 10, reducing the unbalance after the rotor 10 is assembled, achieving multi-section balance after the entire stage of the compressor rotor 10 is assembled, reducing the high-order vibration of the rotor 10 at high speeds, improving the assembly performance and quality of the rotor 10, and increasing the first-time assembly pass rate of the engine.

[0039] Figure 3 Another embodiment of the method for adjusting the imbalance of the compressor rotor 10 of the present invention is shown. The adjustment method of this embodiment includes the following steps:

[0040] In step S110, the eccentricity vector of the axis of each stage rotor disk 12 relative to the axis of rotor 10 is obtained. That is, the assembly prediction result of rotor 10 in step S100.

[0041] In step S120, the position of the centroid of each stage rotor disk 12 relative to the axis of rotor 10 is obtained. The execution order between steps S110 and S120 is not limited in this invention.

[0042] In step S210, based on the centroid position, the centroid offset of the front stage rotor disk 12 and the centroid offset of the rear stage rotor disk 12 are obtained.

[0043] In step S220, the stop imbalance of each two-stage rotor disk 12 is obtained based on the pre-stage centroid offset, the post-stage centroid offset, and the eccentric vector.

[0044] In step S300, the adjustment quality of the adjusting component is obtained based on the unbalance of the stop.

[0045] In step S410, based on the eccentric vector, the fasteners at the mounting edges of the corresponding two-stage rotor disks 12 for the adjustment component to be installed are determined as the fasteners to be installed. Step S410 determines at least one fastener from a plurality of fasteners as the fastener to be installed. The position of the fastener to be installed is opposite to the direction of the eccentric vector to compensate for the imbalance.

[0046] Since there is a certain gap between two adjacent fasteners, there may be no fasteners installed in the direction opposite to the eccentric vector direction. Therefore, in step S410, the fastener closest to the direction opposite to the eccentric vector direction is selected as the fastener to be installed.

[0047] In step S420, an adjusting element with adjusting mass is installed on the fastener to be installed. This involves placing a washer with adjusting mass on the bolt and tightening it with a nut. The adjusting element with adjusting mass can be achieved by selecting a suitable washer.

[0048] Figure 4 It shows Figure 1 A schematic diagram of the assembled structure of the two-stage rotor disks 12 in rotor 10. (See diagram below.) Figure 4 As shown, the center of mass (i.e., the centroid) of the front rotor disk 12a is C1, and the center of mass of the rear rotor disk 12b is C2. Assuming that both the front rotor disk 12a and the rear rotor disk 12b are symmetrical and have a uniform density distribution, the center of mass C1 of the front rotor disk 12a and the center of mass C2 of the rear rotor disk 12b are both located on the axis BB of the rotor disk 12.

[0049] In this embodiment, the front rotor disk 12a and the rear rotor disk 12b are adjusted as a whole, and the axis of the front rotor disk 12a and the axis of the rear rotor disk 12b are on the same straight line, that is... Figure 4As shown in BB, the axis BB of the front rotor disk 12a and the rear rotor disk 12b, which are the objects of adjustment, is the axis of each stage rotor disk 12.

[0050] In one embodiment, the centroid offset of the preceding stage in step S210 is obtained according to relation (1):

[0051]

[0052] Where m1 is the centroid offset of the preceding stage, M1 is the mass of the preceding stage rotor disk 12a, and l 11 Let C1 be the distance between the centroid C1 of the front rotor disk 12a along the axis BB of the front rotor disk 12a and the front mounting edge 12a-1. 12 Let C1 be the distance between the centroid C1 of the front rotor disk 12a along the axis BB of the front rotor disk 12a and the rear mounting edge 12a-2.

[0053] Continue to refer to Figure 4 In one embodiment, the subsequent centroid offset in step S210 is obtained according to relation (2):

[0054]

[0055] Where m2 is the centroid offset of the subsequent stage, M2 is the mass of the subsequent stage rotor disk 12b, and l 21 Let C2 be the distance along the axis of the rear rotor disk 12b and the front mounting edge 12b-1 of BB. 22 The distance between the centroid C2 of the rear rotor disk 12 and the axis BB of the rear rotor disk 12 and the rear mounting edge 12b-2.

[0056] The masses M1 of the pre-stage rotor disk 12, M2 of the post-stage rotor disk 12, the pre-stage centroid offset m1, and the post-stage centroid offset m2 are all vectors. The directions of the masses M1 and M2 of the pre-stage rotor disk 12 are as follows: Figure 4 As shown.

[0057] In one embodiment, the unbalance at the stop in step S220 is obtained according to relation (3):

[0058] P=||m1·r+m2·r|| (3)

[0059] Where P is the stop imbalance and r is the eccentric vector.

[0060] In one embodiment, the adjustment mass of the adjusting member is obtained according to relation (4):

[0061]

[0062] Where m is the adjustment mass of the adjusting component, and R is the pitch circle radius of the fastener at the mounting edge of the corresponding two-stage rotor disk 12.

[0063] The compressor rotor 10 imbalance adjustment system of the present invention includes a processor and a memory. The memory stores non-transitory computer instructions, which, when executed by the processor, perform the compressor rotor 10 imbalance adjustment method described in any of the above embodiments.

[0064] The storage medium of the present invention is used to store non-transitory computer instructions, which, when executed, perform the method for adjusting the unbalance of the compressor rotor 10 as described in any of the above embodiments.

[0065] Embodiments of the subject matter described in this specification can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible, non-transitory program carrier for execution by a data processing apparatus or for controlling the operation of a data processing apparatus. Alternatively or additionally, the program instructions may be encoded on artificially generated propagation signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information and transmit it to a suitable receiving device for execution by the data processing apparatus.

[0066] Computer storage media can be machine-readable storage devices, machine-readable storage substrates, random or serial access memory devices, or combinations thereof.

[0067] Suitable computers for executing computer programs include, for example, general-purpose and / or special-purpose microprocessors, or any other type of central processing unit. Typically, the central processing unit receives instructions and data from read-only memory and / or random access memory. The basic components of a computer include a central processing unit for implementing or executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as disks, magneto-optical disks, or optical disks, or the computer will be operatively coupled to such mass storage devices to receive data from or transfer data to them, or both. However, a computer is not required to have such devices. Furthermore, a computer can be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device such as a universal serial bus (USB) flash drive, to name a few.

[0068] Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, such as semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD-ROM and DVD-ROM disks. Processors and memory may be supplemented by or incorporated into dedicated logic circuitry.

[0069] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for adjusting the imbalance of a compressor rotor, wherein the rotor comprises a multi-stage rotor disc connected in sequence; Its features are, The adjustment method includes: Obtain the assembly prediction results of the rotor and the position of the centroid of each stage of the rotor disk relative to the axis of the rotor. Based on the assembly prediction results and the centroid position, the stop imbalance of the rotor disk between each two stages is obtained. The adjustment quality of the adjusting component is obtained based on the aforementioned unbalance of the stop. Fasteners that install the adjusting member with the adjusted mass at the mounting edge of the corresponding two-stage rotor disk.

2. The adjustment method as described in claim 1, characterized in that, The step of obtaining the assembly prediction result of the rotor and the centroid position of each stage of the rotor disk relative to the axis of the rotor includes: Obtain the eccentricity vector of the axis of the rotor disk of each stage relative to the axis of the rotor; Obtain the position of the centroid of each rotor disk relative to the axis of the rotor; The step of obtaining the stop imbalance of the rotor disk between every two stages based on the assembly prediction result and the centroid position includes: Based on the eccentric vector and the position of the centroid, the stop imbalance of the rotor disk between every two stages is obtained.

3. The adjustment method as described in claim 2, characterized in that, The step of obtaining the stop imbalance amount of the rotor disk between every two stages based on the eccentric vector and the centroid position includes: Based on the centroid position, the centroid offset of the front stage rotor disk and the centroid offset of the rear stage rotor disk in the two stages of rotor disks are obtained. The unbalance of the rotor disk between each two stages is obtained based on the offset of the preceding stage centroid, the offset of the following stage centroid, and the eccentric vector.

4. The adjustment method as described in claim 3, characterized in that, Based on the centroid position, the centroid offset of the preceding rotor disk and the centroid offset of the following rotor disk in the two stages are obtained, wherein the centroid offset of the preceding stage is obtained according to the following relationship: Where m1 is the centroid offset of the preceding stage, M1 is the mass of the preceding stage rotor disk, and l 11 l is the distance between the centroid of the preceding rotor disk along its axis and the front mounting edge. 12 The distance between the centroid of the pre-stage rotor disk and the rear mounting edge is the distance along the axis of the pre-stage rotor disk.

5. The adjustment method as described in claim 4, characterized in that, Based on the centroid position, the centroid offset of the preceding rotor disk and the centroid offset of the following rotor disk in the two stages are obtained, wherein the centroid offset of the following stage is obtained according to the following relationship: Where m2 is the centroid offset of the subsequent stage, M2 is the mass of the subsequent stage rotor disk, and l 21 l is the distance between the centroid of the rear rotor disk along its axis and the front mounting edge. 22 The distance between the centroid of the rear rotor disk and the rear mounting edge is the distance along the axis of the rear rotor disk.

6. The adjustment method as described in claim 5, characterized in that, The unbalance at the stop of each two stages of the rotor disk is obtained based on the centroid offset of the preceding stage, the centroid offset of the following stage, and the eccentricity vector. The unbalance at the stop is obtained according to the following formula: P = ||m1·r + m2·r|| Wherein, P is the stop imbalance amount, and r is the eccentric vector.

7. The adjustment method as described in claim 6, characterized in that, The adjustment mass of the adjusting member is obtained based on the unbalance of the stop, wherein the adjustment mass of the adjusting member is obtained according to the following relationship: Where m is the adjustment mass, and R is the pitch circle radius of the fastener at the mounting edge of the corresponding two-stage rotor disk.

8. The adjustment method according to any one of claims 1-7, characterized in that, The fasteners for installing the adjusting member with the adjusted mass at the mounting edges of the corresponding two-stage rotor disks include: Based on the eccentric vector, the fasteners at the mounting edges of the corresponding two stages of the rotor disks to be installed with the adjustment component are determined and used as the fasteners to be installed. The adjusting element with the adjusted mass is installed on the fastener to be installed.

9. A compressor rotor imbalance adjustment system, characterized in that, Including processor and memory; The memory stores non-transitory computer instructions, which, when executed by the processor, perform the compressor rotor imbalance adjustment method as described in any one of claims 1-8.

10. A storage medium, characterized in that, Used to store non-temporary computer instructions, which, when executed, perform the method for adjusting compressor rotor imbalance as described in any one of claims 1-8.

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