High-pressure rotor stacking optimization method and system

Abstract

The invention provides a high-pressure rotor stacking optimization method and system, and the method comprises the steps: obtaining the mass of each stage of rotor disc, and obtaining the mass center of each stage of rotor disc; according to the distance between the mass center of the rotor disc and the front mounting edge and the distance between the mass center of the rotor disc and the rear mounting edge, the weight corresponding to the eccentricity of the rear mounting edge of the rotor disc is calculated; and obtaining a stacking optimization objective function according to the weight information so as to optimize the vibration influence of the unbalance amount generated by each stage of rotor disc on the whole machine. On the basis of a traditional stacking optimization target, a weight setting method is adopted, a new optimization target is defined, the mass serves as a reference, the unbalance amount generated by all levels of rotor discs can be controlled, so that the vibration of the whole machine in the final assembly state of the engine rotor discs is further reduced, and the assembly quality of the engine rotor discs is improved.

Description

Technical Field

[0001] The present invention relates to the field of engine technology, and in particular to a high-pressure rotor stacking optimization method and system. Background Art

[0002] The high-pressure rotor of an aircraft engine is composed of multiple rotor discs. Each rotor disc has been tested and corrected for imbalance before assembly. However, it is affected by the concentricity and parallelism of the front and rear ends of each rotor disc. The goal of the optimized assembly of the high-pressure compressor rotor stack is to reduce the vibration of the engine rotor after the optimized assembly.

[0003] At present, there are two goals of stacking optimization. One is that after stacking optimization assembly, the eccentricity of the rear support reference of the engine rotor relative to the front support measurement reference is the smallest. For details, please refer to Figure 2 , the eccentricity of C datum relative to A datum and B datum is the smallest. The other is to form an axis with the front support and rear support datums, and the eccentricity vector set of each level of the disk center relative to this axis is the smallest. For details, please refer to Figure 2 The C datum and the A datum form the assembly axis, and the eccentricity of the disk center at each level relative to the assembly line is the smallest.

[0004] On this basis, when conducting vibration tests on the complete machine assembly state, the above two methods cannot further reduce the vibration of the final assembly state, and the assembly quality of the engine high-pressure rotor cannot be further optimized.

[0005] Based on this, the inventor of the present application designed a high-pressure rotor stacking optimization method and system to overcome the above-mentioned technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defect that the stacking optimization assembly method in the prior art cannot further reduce the imbalance generated by the rotor disks at each stage and the vibration of the whole machine in the final assembly state, and to provide a high-pressure rotor stacking optimization method and system.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides a high-pressure rotor stacking optimization method, which is characterized by comprising:

[0009] S1: Obtain the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk;

[0010] S2: calculating the weight of the eccentricity of the rear mounting edge of the rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge;

[0011] S3: obtaining a stacking optimization objective function according to the weight information to optimize the vibration influence of the unbalance amount generated by the rotor disks at each level on the whole machine.

[0012] According to one embodiment of the present invention, step S1 includes:

[0013] The mass of each rotor disk is acquired in sequence along the stacking direction of the rotor disks, and a line connecting the centers of mass of each rotor disk is used as a baseline reference line.

[0014] According to one embodiment of the present invention, the rotor disk has a front mounting edge and a rear mounting edge, and along the stacking direction of the rotor disks, the rear mounting edge is located downstream of the front mounting edge.

[0015] According to one embodiment of the present invention, step S2 includes:

[0016] The weight of the eccentricity of the rear mounting edge of the rotor disk is calculated using the following formula:

[0017]

[0018] Where n is the number of rotor disks to be stacked and optimized; p i is the installation edge weight of the i-th rotor disk; l i,1 is the axial distance from the center of mass of the i-th stage rotor disk to the front mounting edge; l i,2 is the axial distance from the center of mass of the i-th stage rotor disk to the rear mounting edge; m i is the mass of the i-th stage rotor.

[0019] According to one embodiment of the present invention, step S3 includes:

[0020] The stacking optimization objective function is:

[0021]

[0022] Where f is the weighted stacking optimization objective function; p i Install edge weights for level i; r i is the predicted eccentricity vector of the i-th stage rotor.

[0023] According to one embodiment of the present invention, the i The size parameter set of the i-th stage rotor disk and the i-th stage rotor disk runout data set are used as reference.

[0024] According to an embodiment of the present invention, the number of stages of the rotor disks is at least three.

[0025] The present invention further provides a high-pressure rotor stacking optimization system, which is characterized in that the high-pressure rotor stacking optimization system adopts the high-pressure rotor stacking optimization method as described above, and the prediction system includes:

[0026] An acquisition module, used to acquire the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk;

[0027] A calculation module, used for calculating the weight of the eccentricity of the rear mounting edge of the rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge;

[0028] The optimization module is used to obtain a stacking optimization objective function according to the weight information to optimize the vibration effect of the unbalance amount generated by the rotor disks at each level on the whole machine.

[0029] The present invention also provides an electronic device, which is characterized in that it includes: a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and the programs or instructions are executed by the processor to implement the high-pressure rotor stacking optimization method as described above.

[0030] The present invention also provides a readable storage medium, which is characterized in that a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the high-pressure rotor stacking optimization method as described above is implemented.

[0031] The positive and progressive effects of the present invention are:

[0032] The high-pressure rotor stacking optimization method and system of the present invention define new optimization targets by setting weights based on traditional stacking optimization targets. By taking mass as a reference, the imbalance generated by each stage of the rotor disks can be controlled so that the vibration of the entire engine can be further reduced in the final assembly state of the engine rotor disks, thereby improving the assembly quality of the engine rotor disks. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0034] Figure 1 A flow chart of the high-pressure rotor stacking optimization method of the present invention;

[0035] Figure 2 Schematic diagram of the completed multi-stage rotor disk stack;

[0036] Figure 3 It is a schematic diagram of the assembled two-stage rotor disk in the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the electronic device in the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0040] Reference Figures 1 to 3 The present invention proposes a high-pressure rotor stacking optimization method, comprising:

[0041] Step S1: Obtain the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk.

[0042] The mass of each rotor disk is obtained in sequence along the stacking direction of the rotor disks, and the line connecting the centers of mass of each rotor disk is used as a reference line to facilitate the subsequent calculation of the weight of the eccentricity of the rear mounting edge of each rotor disk.

[0043] That is, after determining the number of rotor disks, a line connecting the center of mass of each rotor disk can be established as a baseline reference line, and the distances between the center of mass and the front mounting edge and the rear mounting edge of the rotor disk can be measured respectively, which can then facilitate the subsequent calculation of the weight of the eccentricity of the rear mounting edge of each rotor disk.

[0044] In the traditional optimization method, for example, the front support and the rear support are used as the reference to form an axis, and the eccentricity vector of the center of each rotor disk relative to this axis is determined. After each rotor disk is installed, an eccentricity value can be obtained. Taking the above axis as an example, the eccentricity value above the axis is defined as a positive value, and the eccentricity value below the axis is defined as a negative value. If the eccentricity of the first rotor disk is a positive value, the eccentricity of the next rotor disk is as negative as possible to offset the eccentricity, thereby achieving the optimization of the eccentricity of the rotor disks at all levels.

[0045] However, in the above optimization method, the structure of the rotor disk itself is not used as a reference. It should be noted that the heavier rotor disk has a greater impact on the vibration of the whole machine than the lighter rotor disk. Therefore, when the eccentricity of the heavier first-stage rotor disk is the first preset value, the traditional method will offset the eccentricity of the first-stage rotor disk by adjusting the assembly angle of the second-stage rotor disk. The eccentricity can be offset, but the impact of two rotor disks of different weights on the vibration of the whole machine cannot be offset. Therefore, the traditional eccentricity optimization method cannot further optimize the vibration of the whole machine.

[0046] Therefore, the present application adds the weight of the rotor disk as a reference and as a reference optimization target, which is more conducive to reducing the vibration of the whole machine assembly and improving the assembly quality of the engine high-pressure rotor.

[0047] In one embodiment, the rotor disk comprises a front mounting edge and a rear mounting edge, and along the stacking direction of the rotor disks, the rear mounting edge is located downstream of the front mounting edge.

[0048] For example, the first rotor disk is a primary rotor disk, and the second rotor disk mounted thereon is a secondary rotor disk, then the mounting edge of the primary rotor disk close to the secondary rotor disk corresponds to the rear mounting edge of the primary rotor disk, and the mounting edge of the secondary rotor disk close to the primary rotor disk corresponds to the front mounting edge of the secondary rotor disk. The definition of the mounting edges of three or more rotor disks is consistent with that of the primary rotor disk and the secondary rotor disk, and is not limited here.

[0049] Step S2: Calculate the weight of the eccentricity of the rear mounting edge of the rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge.

[0050] Specifically, the weight of the eccentricity of the rear mounting edge of the rotor disk is calculated using the following formula:

[0051]

[0052] Where n is the number of rotor disks to be stacked and optimized; p i is the installation edge weight of the i-th rotor disk; l i,1 is the axial distance from the center of mass of the i-th stage rotor disk to the front mounting edge; l i,2 is the axial distance from the center of mass of the i-th stage rotor disk to the rear mounting edge; m i is the mass of the i-th stage rotor.

[0053] Reference Figure 3 , Figure 3is the assembly diagram of the two-stage rotor disk. It can be seen that before assembly, the mass of each rotor disk is known. Using the datum reference line established in the figure, the weight of the eccentricity of the rear installation edge of each rotor disk can be calculated. That is, the weight of the heavier rotor disks such as the first-stage rotor disk and the second-stage rotor disk will be greater than the lighter rotor disk installed downstream, thereby achieving the optimization of the vibration of the whole machine, rather than the optimization of the eccentricity of a single rotor disk.

[0054] Step S3: obtaining a stacking optimization objective function according to the weight information to optimize the vibration effect of the unbalanced amount generated by each level of rotor disk on the whole machine.

[0055] Specifically, the stacking optimization objective function is:

[0056]

[0057] Where f is the weighted stacking optimization objective function; p i Install edge weights for level i; r i is the predicted eccentricity vector of the i-th stage rotor.

[0058] The traditional stacking optimization objective function is to minimize the eccentricity of the rear support reference of the engine rotor relative to the front support measurement reference, or to minimize the eccentricity vector set of the disc center of each stage of the rotor disc relative to the axis formed by the front and rear support references.

[0059] The traditional optimization method does not consider the influence of the rotor disc structure on the vibration of the whole machine. For example, the mass of the first-stage rotor disc and the second-stage rotor disc installed in front will be greater than the mass of the n-stage rotor disc installed later. The heavier the rotor disc, the greater the influence on the vibration of the whole machine. Therefore, the traditional method does not consider the influence of the rotor disc weight on the actual vibration of the whole machine. Therefore, the vibration of the whole machine after optimization cannot meet the requirements, and the assembly quality of the whole machine is also low.

[0060] In the present application, the number of rotor disks is at least three. That is, at least three rotor disks are stacked. For example, when stacking the third rotor disk, the weight of the third rotor disk relative to the first three rotor disks can be calculated by referring to the above-mentioned weight calculation formula, and further substituted into the stacking optimization objective function to obtain the optimized eccentricity vector of the third rotor disk, and further adjust the installation angle of the third rotor disk in combination with the eccentricity values ​​of the first rotor disk and the second rotor disk, so as to balance the overall assembly quality of the engine rotor, reduce the vibration of the engine rotor as a whole, and improve the qualified rate of the one-time assembly of the engine.

[0061] Reference Figure 2When there are five rotor disks, the axis is formed by the first-stage rotor disk and the fifth-stage rotor disk, and the center of each rotor disk has an eccentricity value relative to this axis. At this time, the eccentricity value of the first-stage rotor disk is positive, and the second-stage rotor disk is the exact center.

[0062] If the traditional method is used, when installing the three-stage rotor disk, the eccentricity value of the three-stage rotor disk is preferably made downward and consistent with the eccentricity value of the first-stage rotor disk. In this application, the eccentricity value of the first-stage rotor disk needs to be multiplied by the eccentricity vector, and then divided by the weight of the three-stage rotor disk. The eccentricity value obtained is the eccentricity value that actually needs to be adjusted for the three-stage rotor disk. In this way, the weight is set, and the influence of the rotor disk mass on the vibration of the whole machine is taken as one of the influencing factors, and then the eccentricity value is adjusted, and the guidance for the subsequent installation of the rotor disk is given, which is conducive to reducing the vibration value of the whole machine in the final assembly state and improving the assembly quality of the engine rotor.

[0063] In one embodiment, the eccentricity vector of each rotor disk can be predicted with reference to the size parameter set of the rotor disk and the jitter data set. The specific acquisition method is well known to those skilled in the art and is not limited here.

[0064] The present invention also provides a high-pressure rotor stacking optimization system. Using the above high-pressure rotor stacking optimization method, the system includes:

[0065] An acquisition module is used to acquire the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk;

[0066] A calculation module, used for calculating the weight of the eccentricity of the rear mounting edge of the corresponding rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge;

[0067] The optimization module is used to obtain the stacking optimization objective function according to the weight information, so as to optimize the vibration influence of the unbalance amount generated by the rotor disks at each level on the whole machine.

[0068] In the traditional optimization method, for example, the eccentricity vector of the center of each rotor disk relative to the axis is determined by the front support and the rear support as an example, and an eccentricity value can be obtained after each rotor disk is installed. Taking the above axis as an example, the eccentricity value above the axis is defined as a positive value, and the eccentricity value below the axis is defined as a negative value. If the eccentricity of the first rotor disk is a positive value, the eccentricity of the next rotor disk is as negative as possible to offset the eccentricity, thereby optimizing the eccentricity of the rotor disks at all levels.

[0069] However, in the above optimization method, the structure of the rotor disk itself is not used as a reference. It should be noted that the heavier rotor disk has a greater impact on the vibration of the whole machine than the lighter rotor disk. Therefore, when the eccentricity of the heavier first-stage rotor disk is the first preset value, the traditional method will offset the eccentricity of the first-stage rotor disk by adjusting the assembly angle of the second-stage rotor disk. The eccentricity can be offset, but the impact of two rotor disks of different weights on the vibration of the whole machine cannot be offset. Therefore, the traditional eccentricity optimization method cannot further optimize the vibration of the whole machine.

[0070] Therefore, based on the traditional stacking optimization goals, this application defines new optimization goals by setting weights. Taking mass as a reference, the imbalance generated by each stage of the rotor disk can be controlled to further reduce the vibration of the entire machine in the final assembly state of the engine rotor disk, thereby improving the assembly quality of the engine rotor disk.

[0071] Reference Figure 4 The present invention further provides an electronic device 900, comprising: a processor 901 and a memory 902, wherein the memory 902 stores a program or instruction that can be run on the processor 901, and the program or instruction is executed by the processor 901 to implement the above-mentioned high-pressure rotor stacking optimization method. When the program or instruction is executed by the processor 901, each process of the above-mentioned high-pressure rotor stacking optimization method implementation method is implemented, and the same technical effect can be achieved. To avoid repetition, it is not described here.

[0072] The present invention also provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the high-pressure rotor stacking optimization method as described above is implemented. When the program or instruction is executed by the processor, each process of the implementation method of the high-pressure rotor stacking optimization method described above is implemented, and the same technical effect can be achieved. To avoid repetition, it is not described here.

[0073] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.

[0074] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0075] Some aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". The processor may be one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. In addition, various aspects of the present application may be expressed as computer products located in one or more computer-readable media, which include computer-readable program codes. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, tapes ...), optical disks (e.g., compact disks CDs, digital versatile disks DVDs ...), smart cards, and flash memory devices (e.g., cards, sticks, key drives ...).

[0076] A computer-readable medium may include a propagated data signal containing computer program code, such as in baseband or as part of a carrier wave. The propagated signal may have a variety of manifestations, including electromagnetic, optical, etc., or a suitable combination. A computer-readable medium may be any computer-readable medium other than a computer-readable storage medium, which may be connected to an instruction execution system, device or apparatus to communicate, propagate or transmit a program for use. The program code on the computer-readable medium may be propagated via any suitable medium, including radio, cable, fiber optic cable, radio frequency signal, or similar medium, or any combination of the above mediums.

[0077] Similarly, it should be noted that in order to simplify the description disclosed in this application, so as to help understand one or more embodiments of the invention, in the above description of the embodiments of the present application, sometimes multiple features are merged into one embodiment, drawings or descriptions thereof. However, this disclosure method does not mean that the features required by the object of the present application are more than the features mentioned in the claims. In fact, the features of the embodiment are less than all the features of the single embodiment disclosed above. In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "approximately", "approximately" or "substantially" in some examples. Unless otherwise specified, "approximately", "approximately" or "substantially" indicate that the number allows a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining the digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, such numerical settings are as accurate as possible within the feasible range.

[0078] Although the present invention is disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A high-pressure rotor stacking optimization method, characterized in that: include: S1: Obtain the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk; S2: calculating the weight of the eccentricity of the rear mounting edge of the rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge; S3: Obtaining a stacking optimization objective function according to the weight information to optimize the vibration impact of the unbalanced amount generated by the rotor disks at each level on the whole machine.

2. The high-pressure rotor stacking optimization method according to claim 1, characterized in that: The step S1 comprises: The mass of each rotor disk is acquired in sequence along the stacking direction of the rotor disks, and a line connecting the centers of mass of each rotor disk is used as a baseline reference line.

3. The high-pressure rotor stacking optimization method according to claim 1, characterized in that: The rotor disk has a front mounting edge and a rear mounting edge, and along the stacking direction of the rotor disks, the rear mounting edge is located downstream of the front mounting edge.

4. The high-pressure rotor stacking optimization method according to claim 1, characterized in that: The step S2 comprises: The weight of the eccentricity of the rear mounting edge of the rotor disk is calculated using the following formula: Where n is the number of rotor disks to be stacked and optimized; p i is the installation edge weight of the i-th rotor disk; l i,1 is the axial distance from the center of mass of the i-th stage rotor disk to the front mounting edge; l i,2 is the axial distance from the center of mass of the i-th stage rotor disk to the rear mounting edge; m i is the mass of the i-th stage rotor.

5. The high-pressure rotor stacking optimization method according to claim 4, characterized in that: The step S3 comprises: The stacking optimization objective function is: Where f is the weighted stacking optimization objective function; p i Install edge weights for level i; r i is the predicted eccentricity vector of the i-th stage rotor.

6. The high-pressure rotor stacking optimization method according to claim 5, characterized in that: The r i The size parameter set of the i-th stage rotor disk and the i-th stage rotor disk runout data set are used as reference.

7. The high-pressure rotor stacking optimization method according to claim 4, characterized in that: The number of stages of the rotor disks is at least three.

8. A high-pressure rotor stacking optimization system, characterized in that: The high-pressure rotor stacking optimization system adopts the high-pressure rotor stacking optimization method according to any one of claims 1 to 7, and the prediction system includes: An acquisition module, used to acquire the mass of each stage of the rotor disk and obtain the center of mass of each stage of the rotor disk; A calculation module, used for calculating the weight of the eccentricity of the rear mounting edge of the rotor disk according to the distance between the center of mass of the rotor disk and the front mounting edge and the rear mounting edge; The optimization module is used to obtain a stacking optimization objective function according to the weight information to optimize the vibration effect of the unbalance amount generated by the rotor disks at each level on the whole machine.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and the programs or instructions are executed by the processor to implement the high-pressure rotor stacking optimization method as described in any one of claims 1-7.

10. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, the high-pressure rotor stacking optimization method according to any one of claims 1 to 7 is implemented.

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