Method and device for disassembling balance weight screws of aero-engine fan

Abstract

The invention provides an aero-engine fan counterweight screw disassembling method and device, and relates to the technical field of aero-engines. According to the aero-engine fan counter weight screw disassembling method, due to the fact that the selected screw holes to be disassembled comprise the front side screw holes and the opposite side screw holes at the same time during fan opening disassembling each time, correspondingly, when fan opening disassembling is conducted in sequence, the effective weight moment upper limit in the single direction can be effectively increased by reversely increasing and decreasing the weight of the corresponding front side screws and the opposite side screws, and the effective weight moment upper limit can be effectively increased. And the lower limit of the selectable effective weight moment is effectively reduced by increasing and decreasing the positive side screws and the opposite side screws at the same time, the balancing accuracy is improved, the selectivity of the scheme is increased, and the scheme with the fewer counterweight screws needing to be replaced can be adopted.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular to a method and a device for disassembling a counterweight screw of an aero-engine fan. Background Art

[0002] Engine fan vibration is an important cause of blade wear and damage. In actual operation, blade tip wear and component displacement will aggravate the imbalance that exists at the beginning of fan development, thereby further worsening the vibration. When the blade vibration exceeds the limit, the fan imbalance needs to be offset by selecting a counterweight screw to install at a specific position on the fan blade to reduce the vibration response level of the engine fan.

[0003] The existing method of selecting screw positions and models is usually to consult the balancing screw weight distance chart, find and install balancing screws or balancing screw groups that are close to the weight moment required to offset the imbalance. This method has general balancing accuracy and relies more on experience for more complex situations. Another common method is to use the parallelogram method based on vector decomposition to find the balancing screw installation plan by drawing. This method selects screws in the half plane where the required counterweight is located, and gradually decomposes the required counterweight in an open fan manner to an amplitude and deflection angle close to zero to complete the fan balance. However, the inventors have found that this method has low balancing accuracy and, to a certain extent, excludes the possibility of some solutions that require the replacement of a small number of counterweight screws. Summary of the invention

[0004] The purpose of the present invention is to provide a method for disassembling a counterweight screw of an aircraft engine fan, which helps to improve the technical problem of low balancing accuracy existing in the prior art.

[0005] Another object of the present invention is to provide a device for disassembling a counterweight screw of an aircraft engine fan, which helps to improve the technical problem of low balancing accuracy existing in the prior art.

[0006] Another object of the present invention is to provide a readable storage medium, which helps to improve the technical problem of low balancing accuracy existing in the prior art.

[0007] The embodiments of the present invention can be implemented in the following ways:

[0008] A method for decomposing a counterweight screw of an aircraft engine fan, the method comprising: obtaining a vector to be decomposed; wherein the vector to be decomposed comprises a vector magnitude and a vector direction;

[0009] Taking the vector to be decomposed as the center, multiple fan-out decompositions are performed in sequence on both sides of the vector to be decomposed until the residual vector meets the preset requirements;

[0010] Among them, in each fan decomposition, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as screw holes to be decomposed, and counterweight screws are installed in the screw holes to be decomposed to decompose at least part of the vector to be decomposed; the residual vector is the remaining part after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw.

[0011] Optionally, the step of taking the vector to be decomposed as the center and sequentially performing multiple fan-out decompositions on both sides of the vector to be decomposed until the residual vector meets preset requirements is performed according to the first path and / or the second path.

[0012] Optionally, the first path includes:

[0013] According to the position of the vector to be decomposed, the screw holes on the fan plane are divided into a plurality of mutually independent screw hole groups, each screw hole group including two screw holes located on both sides of the vector to be decomposed and screw holes on opposite sides of the two screw holes;

[0014] Set the number of skipped screw hole groups; the skipped screw hole groups do not need to be decomposed;

[0015] The screw hole groups that have not been skipped are sequentially decomposed in a fan-shaped manner along a direction away from the vector to be decomposed until the residual vector meets the preset requirement.

[0016] Optionally, the second path includes:

[0017] Super-decomposing the vector to be decomposed to obtain a residual decomposition vector;

[0018] The residual decomposition vector is subjected to multiple fan-opening decompositions in sequence until the obtained residual vector meets the preset requirements.

[0019] Optionally, the step of super-decomposing the vector to be decomposed comprises:

[0020] Obtaining a super-decomposition vector; wherein the super-decomposition vector is obtained by multiplying the vector to be decomposed by a super-decomposition coefficient;

[0021] A pair of screw holes closest to the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are used as super-decomposed screw holes;

[0022] Select the model of the counterweight screw installed in the super-decomposition screw hole to decompose the super-decomposition vector through the effective weight moment of the counterweight screw in the super-decomposition screw hole to obtain a residual decomposition vector; wherein the effective weight moment of the counterweight screw in the super-decomposition screw hole is less than or equal to the super-decomposition vector, and the residual decomposition vector is the remaining part after subtracting the effective weight moment from the vector to be decomposed.

[0023] Optionally, the step of obtaining the vector to be decomposed includes:

[0024] The unbalance amount sustained by the fan during operation is obtained without removing the existing screw configuration in the fan plane, and the balance vector used to decompose the unbalance amount is used as the vector to be decomposed.

[0025] Optionally, after the step of performing multiple fan decompositions in sequence on both sides of the vector to be decomposed with the vector to be decomposed as the center until the residual vector meets the preset requirements, the aircraft engine fan counterweight screw decomposition method further includes:

[0026] Output an aircraft engine fan counterweight screw decomposition scheme, wherein the aircraft engine fan counterweight screw decomposition scheme includes a screw hole position where a counterweight screw needs to be replaced, a model of a counterweight screw installed in the screw hole, and a residual vector value that meets preset requirements.

[0027] A device for disassembling a counterweight screw of an aircraft engine fan, the device comprising:

[0028] An acquisition module, the acquisition module is used to acquire a vector to be decomposed; wherein the vector to be decomposed includes a vector magnitude and a vector direction;

[0029] A calculation module, wherein the calculation module is used to perform multiple fan-shaped decompositions in sequence on both sides of the vector to be decomposed with the vector to be decomposed as the center until the residual vector meets the preset requirements; wherein, in each fan-shaped decomposition, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as the screw holes to be decomposed, and counterweight screws are installed in the screw holes to be decomposed to decompose at least part of the vector to be decomposed; the residual vector is the residual vector after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw.

[0030] An output module is used to output a decomposition scheme of an aircraft engine fan counterweight screw, wherein the decomposition scheme of the aircraft engine fan counterweight screw includes the position of a screw hole where the counterweight screw needs to be replaced, the model of the counterweight screw installed in the screw hole, the number of counterweight screws that need to be replaced, and at least one of the values ​​of a residual vector that meets preset requirements.

[0031] A readable storage medium stores a computer program, and the computer program is executed by a processor to implement the above-mentioned aircraft engine fan counterweight screw disassembly method.

[0032] The beneficial effects of the aircraft engine fan counterweight screw disassembly method, device and readable storage medium provided by the embodiments of the present invention include:

[0033] The embodiment of the present invention provides a method for decomposing the counterweight screw of an aircraft engine fan, the method comprising: obtaining a vector to be decomposed; wherein the vector to be decomposed includes a vector size and a vector direction; with the vector to be decomposed as the center, multiple fan-opening decompositions are sequentially performed on both sides of the vector to be decomposed until the residual vector meets the preset requirements; wherein, in each fan-opening decomposition, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as screw holes to be decomposed, and at least part of the vector to be decomposed is decomposed by installing counterweight screws in the screw holes to be decomposed; the residual vector is the residual vector after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw. Since the screw holes to be decomposed selected in each fan-opening decomposition include both the positive side screw holes and the opposite side screw holes, accordingly, when performing the fan-opening decomposition in sequence, the upper limit of the effective weight moment in a single direction can be effectively increased by increasing and decreasing the weight of the corresponding positive side screws and the opposite side screws in the opposite direction, and the lower limit of the selectable effective weight moment can be effectively reduced by increasing and decreasing the weight of the positive side screws and the opposite side screws at the same time, thereby improving the balancing accuracy, increasing the selectivity of the scheme, and facilitating the adoption of a scheme with fewer counterweight screws to be replaced.

[0034] An embodiment of the present invention also provides an aircraft engine fan counterweight screw disassembly device, which uses both positive side screw holes and opposite side screw holes as screw holes to be disassembled in one fan opening disassembly, so that the upper limit of the effective weight moment in a single direction can be effectively increased by increasing or decreasing the weight of the corresponding positive side screws and the opposite side screws in the opposite direction, and the lower limit of the optional effective weight moment can be effectively reduced by increasing or decreasing the positive side screws and the opposite side screws at the same time, thereby improving the balancing accuracy, increasing the selectivity of the scheme, and facilitating the adoption of a scheme that requires fewer counterweight screws to be replaced.

[0035] An embodiment of the present invention also provides a readable storage medium, which stores a computer program that can implement the above-mentioned aircraft engine fan counterweight screw decomposition method. Therefore, it also has the beneficial effect of improving the balancing accuracy, increasing the selectivity of the scheme, and facilitating the adoption of a scheme that requires fewer counterweight screws to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0037] Figure 1 A flow chart showing a method for disassembling a counterweight screw of an aircraft engine fan provided according to one aspect of the present invention is shown;

[0038] Figure 2 A schematic diagram of a fan opening operation according to one aspect of the present invention is shown. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0040] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Figure 1 The flowchart of the method for disassembling the counterweight screw of the aircraft engine fan provided by this embodiment is shown. Figure 1 The present embodiment provides a method for decomposing the counterweight screws of an aircraft engine fan. The decomposition of the counterweight screws of an aircraft engine fan is an operation to set the effective weight moment of the counterweight screws on the aircraft engine fan, and to offset the imbalance during the operation of the fan through the balance vector generated by the effective weight moment, thereby achieving the goal of reducing the vibration response level of the fan.

[0044] At present, there are many optional models of counterweight screws. Different models of counterweight screws correspond to different weight moments. For example, the screw with the smallest weight moment is used as a plug for the mounting hole of the counterweight screw. The effective weight moment of the counterweight screws of other models is the weight moment minus the minimum weight moment. The imbalance can be offset by combining different models of counterweight screws.

[0045] The method for disassembling the counterweight screws of an aircraft engine fan provided in this embodiment specifically comprises the following steps:

[0046] S01: Get the vector to be decomposed.

[0047] The vector to be decomposed includes the vector size and the vector direction. Specifically, the vector to be decomposed is obtained without removing the existing screw configuration in the fan plane to obtain the imbalance borne during the operation of the fan. The vector to be decomposed is the balance vector used to offset the imbalance. Accordingly, in the subsequent replacement of the counterweight screws to offset the imbalance, there is no need to remove all the original screws in advance. The counterweight screws can be replaced in sequence according to the subsequent aircraft engine fan counterweight screw decomposition plan. Optionally, the balance vector can be calculated based on the vibration amplitude and phase of the fan that needs to be balanced and the balance influence coefficient.

[0048] S02: Taking the vector to be decomposed as the center, multiple fan-out decompositions are performed in sequence on both sides of the vector to be decomposed until the residual vector meets the preset requirements.

[0049] When disassembling an open fan, suitable counterweight screws are set in the screw holes to be disassembled, and the effective weight moment generated by the counterweight screws is used to decompose at least part of the vector to be decomposed, thereby reducing the imbalance that the fan bears during operation. The residual vector is the remaining part of the vector to be decomposed after the decomposition is completed after the effective weight moment of the counterweight screw.

[0050] Optionally, the preset requirement can be set as: all screw holes that can be used as screw holes to be decomposed are subjected to open fan decomposition; or, after only some of the screw holes that can be used as screw holes to be decomposed are subjected to open fan decomposition, the value of the residual vector meets the fan operation requirement or the value of the residual vector is less than the lower limit of the weight moment that can be generated by a group of screw holes to be decomposed, the residual vector is considered to meet the preset requirement.

[0051] Figure 2 The schematic diagram of the decomposition of the fan provided in this embodiment is shown. Figure 2 After obtaining the vector 20 to be decomposed, the fan plane 10 can be divided into a front side plane 11 and an opposite side plane 12 according to the position of the vector 20 to be decomposed. The front side plane 11 and the opposite side plane 12 are semicircular, and the side where the vector 20 to be decomposed is located is the front side plane 11, and the side opposite to the vector 20 to be decomposed is the opposite side plane 12.

[0052] When performing an open fan decomposition, two screw holes located on both sides of the vector 20 to be decomposed and the screw holes on the opposite sides of the two screw holes are selected as the screw holes 30 to be decomposed. In other words, each time the open fan is decomposed, the number of screw holes 30 to be decomposed is four. In this way, for a fan plane with a total number of balancing screw mounting holes of n, a maximum of floor(n / 4) open fan decompositions can be performed, and thus, the maximum number of screws that can be used as the screw holes 30 to be decomposed is 4floor(n / 4).

[0053] The four screw holes 30 to be decomposed in each fan decomposition constitute two screw hole pairs, which are respectively a first screw hole pair and a second screw hole pair. The first screw hole pair includes a first positive side screw hole 31 and a first opposite side screw hole 32, and the second screw hole pair includes a second positive side screw hole 33 and a second opposite side screw hole 34. The positive side screw hole is a screw hole located in the positive side plane 11, and the opposite side screw hole is a screw hole located in the opposite side plane 12. Moreover, the connecting line between the positive side screw hole and the opposite side screw hole in the same screw hole pair passes through the center of the fan plane 10. In other words, the connecting line between the first positive side screw hole 31 and the first opposite side screw hole 32 is a first radial line 13, and the connecting line between the second positive side screw hole 33 and the second opposite side screw hole 34 is a second radial line 14.

[0054] When performing open fan decomposition, the vector 20 to be decomposed is decomposed toward the first radial line 13 and the second radial line 14 to obtain the first component vector 21 and the second component vector 22. The first residual component vector 41 is obtained by at least partially decomposing the first component vector 21 by installing a counterweight screw in the first positive side screw hole 31 and the first opposite side screw hole 32. In other words, the first residual component vector 41 is the difference between the first component vector 21 and the effective weight moment generated by the counterweight screw in the first screw hole. The second residual component vector 42 is obtained by at least partially decomposing the second component vector 22 by installing a counterweight screw in the second positive side screw hole 33 and the second opposite side screw hole 34. In other words, the second residual air volume vector 42 is the difference between the second component vector 22 and the effective weight moment generated by the counterweight screw in the second screw hole. The first residual component vector 41 is combined with the second residual vector component 42 to obtain the residual vector 40.

[0055] In order to minimize the number of counterweight screw holes used to decompose the vector to be decomposed, that is, the number of counterweight screw replacements is reduced, each time the fan opening decomposition is performed, the counterweight screws with a larger effective weight moment are used to subtract the components of the vector, that is, by selecting the installation scheme of the counterweight screw model in the first positive side screw hole 31 and the first opposite side screw hole 32, the first residual component vector 41 generated is minimized; by selecting the installation direction of the counterweight screw model in the second positive side screw hole 33 and the second opposite side screw hole 34, the second residual component vector 42 generated is minimized.

[0056] Since the screw holes to be disassembled selected each time the fan is opened and disassembled include both the positive side screw holes and the opposite side screw holes, accordingly, when the fan is opened and disassembled in sequence, the upper limit of the effective weight moment in a single direction can be effectively increased by increasing or decreasing the weight of the corresponding positive side screws and the opposite side screws in the opposite direction, and the lower limit of the optional effective weight moment can be effectively reduced by increasing or decreasing the positive side screws and the opposite side screws at the same time, thereby improving the balancing accuracy, increasing the selectivity of the scheme, and facilitating the adoption of a scheme that requires fewer balancing screws to be replaced.

[0057] Furthermore, when executing step S02, it can be executed according to the first path and / or the second path. When executing according to different paths, different counterweight screw decomposition schemes can be obtained. Accordingly, if it is executed according to multiple paths, more counterweight screw decomposition schemes can be obtained more comprehensively, which helps to obtain a better scheme.

[0058] Specifically, the first path includes:

[0059] S11: According to the position of the vector to be decomposed, the screw holes on the fan plane are divided into multiple independent screw hole groups, each screw hole group includes two screw holes located on both sides of the vector to be decomposed and screw holes on the opposite sides of the two screw holes. Specifically, for a fan plane with a total number of n balancing screw mounting holes, at most floor(n / 4) screw hole groups can be obtained, and each screw hole group can be used as a screw hole to be decomposed in a fan opening decomposition.

[0060] S12: Set the number of skipped screw hole groups. The skipped screw hole groups do not need to be decomposed. For example, if the number of skipped screw hole groups is set to 3, the maximum number of decompositions actually performed in the process of executing step S02 according to the first path is floor(n / 4)-3.

[0061] Specifically, the set number of skipped screw hole groups should be less than floor(n / 4), that is, the set number of skipped screw hole groups is 0 to (floor(n / 4)-1). If the number of skipped screw hole groups is set to 0, all screw hole groups can be decomposed into open fans at most.

[0062] S13: Decomposing the screw hole groups that have not been skipped in a fan-shaped manner in a direction away from the vector to be decomposed, until the residual vector meets the preset requirement.

[0063] That is, starting from the position of the vector to be decomposed, the unskipped screw hole groups are sequentially decomposed along the circumferential direction of the fan plane (including clockwise and counterclockwise directions) in the direction away from the vector to be decomposed, and the unskipped screw hole groups can be randomly selected according to the set number of skipped screw hole groups. In other words, each time the fan is decomposed, the screw hole group selected as the screw hole to be decomposed is the screw hole group that is closest to the decomposition vector and has not been decomposed and has not been skipped.

[0064] Specifically, the second path includes:

[0065] S21: Super-decomposing the vector to be decomposed to obtain a residual decomposition vector.

[0066] The steps of super decomposing the vector to be decomposed include:

[0067] Obtain a super-resolution vector. The super-resolution vector is obtained by multiplying the vector to be resolved by the super-resolution coefficient. The value of the super-resolution coefficient should be greater than 1, that is, the super-resolution vector is a vector whose value is greater than the vector to be resolved and whose direction is consistent with the vector to be resolved. Optionally, the value of the super-resolution coefficient is greater than 1 and less than or equal to 1.2. Specifically, the value of the super-resolution coefficient can be set to 1.05, 1.1 or 1.2, etc.

[0068] A pair of screw holes closest to the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are used as super-decomposed screw holes.

[0069] Select the model of the counterweight screw installed in the super-decomposition screw hole, and decompose the super-decomposition vector by the effective weight moment of the counterweight screw in the super-decomposition screw hole to obtain the residual decomposition vector. It should be noted that the value of the effective weight moment of the counterweight screw is less than or equal to the super-decomposition vector, so the effective weight moment may be greater than, equal to, or less than the value of the vector to be decomposed. The residual decomposition vector is the remaining part after the effective weight moment is subtracted from the vector to be decomposed, so the direction of the residual decomposition vector may be the same as the vector to be decomposed, or it may be opposite to the vector to be decomposed.

[0070] By setting the step of super-decomposing the vector to be decomposed, the counterweight screw whose effective weight moment exceeds the balance vector is allowed to be considered in the selection scheme. By super-decomposing, the counterweight screw model with a similar size to the component but an effective weight moment exceeding the component is selected in the super-decomposed screw hole, so that the larger vector to be decomposed of the circular plate is decomposed into smaller vectors (i.e., residual decomposition vectors) through super-decomposition vector operation.

[0071] It should be noted that, in the description of this embodiment, "the direction of the residual decomposition vector is opposite to the direction of the vector to be decomposed" should be understood in a broad sense. When the vector to be decomposed is located in the positive side plane 11, "the direction of the residual decomposition vector is opposite to the direction of the vector to be decomposed" indicates that the residual decomposition vector is located in the opposite side plane 12. In other words, the direction of the residual decomposition vector and the direction of the vector to be decomposed are not necessarily 180° different. Accordingly, "the direction of the residual decomposition vector is the same as the direction of the vector to be decomposed" indicates that the residual decomposition vector is located in the positive side plane 11, which does not necessarily mean that the residual decomposition vector coincides with the vector to be decomposed.

[0072] S22: performing multiple fan-open decompositions on the residual decomposition vector in sequence until the obtained residual vector meets the preset requirements.

[0073] Specifically, multiple fan-opening decompositions can be performed according to the steps of the first path, and during the execution, the residual decomposition vector is used as the vector to be decomposed. In addition, when multiple fan-opening decompositions are performed according to the steps of the first path, the screw holes that have been processed in step S21 can be considered as undecomposed screw holes.

[0074] In the aircraft engine fan counterweight screw decomposition method provided in this embodiment, multiple vector decomposition schemes can be obtained through step S02. Therefore, in this embodiment, the aircraft engine counterweight screw decomposition method can also include:

[0075] S03: Output the decomposition plan of the aircraft engine counterweight screws.

[0076] The decomposition scheme of the counterweight screw of the aircraft engine fan includes at least one of the position of the screw hole where the counterweight screw needs to be replaced, the model of the counterweight screw installed in the screw hole, the number of counterweight screws to be replaced, and the value of the residual vector that meets the preset requirements. Specifically, in the present embodiment, the decomposition scheme of the counterweight screw of the aircraft engine fan includes the position of the screw hole where the counterweight screw needs to be replaced, the model of the counterweight screw installed in the screw hole, the number of counterweight screws to be replaced, and the value of the residual vector that meets the preset requirements.

[0077] After obtaining a plurality of aircraft engine fan weight screw decomposition schemes, the optimal solution can be selected by comprehensively considering factors such as the aircraft engine fan balancing requirements, the number of screw replacements, and the value of the residual vector. For example, the optimal solution can be one in which the residual vector meets the aircraft engine fan balancing requirements and is the smallest, and the number of screw replacements is the smallest. It is understandable that in some other embodiments, the weight of the factors considered for selecting the optimal solution from a plurality of aircraft engine fan weight screw decomposition schemes can also be pre-set according to requirements, so as to directly output the optimal solution.

[0078] The embodiment of the present invention further provides an aircraft engine fan counterweight screw disassembly device, and the above-mentioned aircraft engine fan counterweight screw disassembly method can be implemented based on the aircraft engine fan counterweight screw disassembly device. The aircraft engine fan counterweight screw disassembly device includes an acquisition module, a calculation module and an output module.

[0079] The acquisition module is used to acquire the vector to be decomposed, wherein the vector to be decomposed includes the vector magnitude and the vector direction.

[0080] The operation module is used to perform multiple fan-shaped decompositions on both sides of the vector to be decomposed, with the vector to be decomposed as the center, until the residual vector meets the preset requirements. In each fan-shaped decomposition, a pair of screw holes on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as the screw holes to be decomposed, and counterweight screws are installed in the screw holes to be decomposed to decompose at least part of the vector to be decomposed; the residual vector is the vector remaining after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw.

[0081] An output module is used to output a decomposition scheme of an aircraft engine fan counterweight screw. The decomposition scheme of an aircraft engine fan counterweight screw includes the position of a screw hole where the counterweight screw needs to be replaced, the model of the counterweight screw installed in the screw hole, and the value of a residual vector that meets preset requirements.

[0082] The output of the aircraft engine fan counterweight screw decomposition scheme can be multiple, and the subsequent staff can select the optimal solution according to the needs, or directly output the optimal solution

[0083] The embodiment of the present invention also provides a readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be written by instructing related hardware through a computer program. The computer program exists in a readable storage medium. When the computer program is executed by a processor, the steps in the above-mentioned aircraft engine fan counterweight screw decomposition method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electric carrier signal and telecommunication signal.

[0084] The aircraft engine fan counterweight screw decomposition method, device and readable storage medium provided by the embodiments of the present invention can select and replace the positions and models of the screws of the entire fan without removing the existing screw configuration, thereby reducing the complexity of disassembly and reliance on experience. Moreover, due to the use of full-plane decomposition (front side plane + opposite side plane), the decomposition range of the counterweight screw is larger, and the decomposition steps of the counterweight screw are reduced, which helps to improve the balancing accuracy. Moreover, due to the provision of a super-decomposition path and the setting to allow skipping of some screw hole groups, more and more comprehensive decomposition schemes for the aircraft engine fan counterweight screws can be obtained, which helps to obtain a decomposition scheme with fewer counterweight screw replacements and smaller residual vectors.

[0085] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for disassembling a counterweight screw of an aircraft engine fan, characterized in that: The method for disassembling the counterweight screw of the aircraft engine fan comprises: Obtaining a vector to be decomposed; wherein the vector to be decomposed includes a vector magnitude and a vector direction; Taking the vector to be decomposed as the center, multiple fan-out decompositions are performed in sequence on both sides of the vector to be decomposed until the residual vector meets the preset requirements; Among them, in each fan decomposition, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as screw holes to be decomposed, and counterweight screws are installed in the screw holes to be decomposed to decompose at least part of the vector to be decomposed; the residual vector is the remaining part after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw.

2. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 1, characterized in that: The step of taking the vector to be decomposed as the center and sequentially performing multiple fan-out decompositions on both sides of the vector to be decomposed until the residual vector meets the preset requirements is performed according to the first path and / or the second path.

3. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 2, characterized in that: The first path includes: According to the position of the vector to be decomposed, the screw holes on the fan plane are divided into a plurality of mutually independent screw hole groups, each screw hole group including two screw holes located on both sides of the vector to be decomposed and screw holes on opposite sides of the two screw holes; Set the number of skipped screw hole groups; the skipped screw hole groups do not need to be decomposed; The screw hole groups that have not been skipped are sequentially decomposed in a fan-shaped manner along a direction away from the vector to be decomposed until the residual vector meets the preset requirement.

4. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 2, characterized in that: The second path includes: Super-decomposing the vector to be decomposed to obtain a residual decomposition vector; The residual decomposition vector is subjected to multiple fan-opening decompositions in sequence until the obtained residual vector meets the preset requirements.

5. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 4, characterized in that: The step of super-decomposing the vector to be decomposed comprises: Obtaining a super-decomposition vector; wherein the super-decomposition vector is obtained by multiplying the vector to be decomposed by a super-decomposition coefficient; A pair of screw holes closest to the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are used as super-decomposed screw holes; Select the model of the counterweight screw installed in the super-decomposition screw hole to decompose the super-decomposition vector through the effective weight moment of the counterweight screw in the super-decomposition screw hole to obtain a residual decomposition vector; wherein the effective weight moment of the counterweight screw in the super-decomposition screw hole is less than or equal to the super-decomposition vector, and the residual decomposition vector is the remaining part after subtracting the effective weight moment from the vector to be decomposed.

6. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 1, characterized in that: The step of obtaining the vector to be decomposed comprises: The unbalance amount sustained by the fan during operation is obtained without removing the existing screw configuration in the fan plane, and the balance vector used to decompose the unbalance amount is used as the vector to be decomposed.

7. The method for disassembling the counterweight screw of an aircraft engine fan according to claim 1, characterized in that: After the step of performing multiple fan-opening decompositions in sequence on both sides of the vector to be decomposed with the vector to be decomposed as the center until the residual vector meets the preset requirements, the aircraft engine fan counterweight screw decomposition method further includes: Output an aircraft engine fan counterweight screw decomposition scheme, wherein the aircraft engine fan counterweight screw decomposition scheme includes a screw hole position where a counterweight screw needs to be replaced, a model of a counterweight screw installed in the screw hole, and a residual vector value that meets preset requirements.

8. An aircraft engine fan counterweight screw disassembly device, characterized in that: The aircraft engine fan counterweight screw disassembly device comprises: An acquisition module, the acquisition module is used to acquire a vector to be decomposed; wherein the vector to be decomposed includes a vector magnitude and a vector direction; A calculation module, wherein the calculation module is used to perform multiple fan-shaped decompositions in sequence on both sides of the vector to be decomposed with the vector to be decomposed as the center until the residual vector meets the preset requirements; wherein, in each fan-shaped decomposition, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite sides of the pair of screw holes are selected as the screw holes to be decomposed, and counterweight screws are installed in the screw holes to be decomposed to decompose at least part of the vector to be decomposed; the residual vector is the residual vector after the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw. An output module is used to output a decomposition scheme of an aircraft engine fan counterweight screw, wherein the decomposition scheme of the aircraft engine fan counterweight screw includes the position of a screw hole where the counterweight screw needs to be replaced, the model of the counterweight screw installed in the screw hole, the number of counterweight screws that need to be replaced, and at least one of the values ​​of a residual vector that meets preset requirements.

9. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method for disassembling a fan counterweight screw of an aircraft engine according to any one of claims 1 to 7.

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