Aero-engine fan balance weight screw disassembly method and device

Abstract

The application provides an aero-engine fan counterweight screw disassembly method and device, and relates to the technical field of aero-engines. The aero-engine fan counterweight screw disassembly method comprises the following steps: selecting a to-be-disassembled screw hole which simultaneously comprises a positive side screw hole and an opposite screw hole at each time of fan opening and disassembly; and correspondingly, when sequentially opening and disassembling, the effective weight moment upper limit in a single direction is effectively increased through the corresponding positive side screw and opposite screw reverse weight increasing and decreasing, and the optional effective weight moment lower limit is effectively reduced through the positive side screw and opposite screw same weight increasing and same weight decreasing, so that the trimming accuracy is improved, the selectability of the scheme is increased, and the scheme with less required replacement counterweight screw number is helpful.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, in particular to a fan counterweight screw disassembly method and device for aero-engines. BACKGROUND

[0002] Engine fan vibration is an important cause of blade wear and damage. In actual operation, tip wear and component displacement can exacerbate the imbalance that existed at the beginning of fan development, further worsening the vibration situation. When the blade vibration exceeds the limit, the fan imbalance needs to be offset by installing counterweight screws at specific locations on the fan blades to reduce the vibration response level of the engine fan.

[0003] The existing screw position and model selection method usually involves consulting the balancing screw weight distance chart to find a balancing screw or a balancing screw group with a weight moment close to the required added weight to offset the imbalance and installing it. This method generally has low balancing accuracy and relies more on experience for more complex situations. Another commonly used method is to use a parallelogram method based on vector decomposition to find a balancing screw installation scheme by drawing. This method selects screws in the half-plane where the required counterweight is located, and gradually decomposes the required counterweight to an amplitude and a bias angle close to zero in a fan opening manner to complete fan balancing. However, the inventors have found that this method has low balancing accuracy and to some extent excludes the possibility of some required replacement counterweight screw schemes with fewer screws. SUMMARY

[0004] The present application aims to provide an aero-engine fan counterweight screw disassembly method that helps to improve the low balancing accuracy problem in the prior art.

[0005] The present application also aims to provide an aero-engine fan counterweight screw disassembly device that helps to improve the low balancing accuracy problem in the prior art.

[0006] The present application also aims to provide a readable storage medium that helps to improve the low balancing accuracy problem in the prior art.

[0007] The embodiments of the present application can be implemented in the following way:

[0008] An aero-engine fan counterweight screw disassembly method, the aero-engine fan counterweight screw disassembly method comprising: obtaining a required disassembly vector; wherein the required disassembly vector comprises a vector size and a vector direction;

[0009] Performing multiple fan opening disassembly operations to both sides of the required disassembly vector in sequence with the required disassembly vector as the center until the residual vector meets the preset requirements;

[0010] wherein, in each of the fan-out decompositions, a pair of screw holes located on both sides of the vector to be decomposed and a screw hole opposite to 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 a counterweight screw in the screw holes to be decomposed; and the residual vector is a residual part of the vector to be decomposed after the vector to be decomposed is decomposed by an effective weight moment of the counterweight screw.

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

[0012] Optionally, the first path comprises:

[0013] 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 of which comprises two screw holes located on both sides of the vector to be decomposed and a screw hole opposite to the two screw holes;

[0014] The number of skipped screw hole groups is set; wherein, the skipped screw hole groups do not need to be subjected to fan-out decomposition;

[0015] In the direction away from the vector to be decomposed, the fan-out decomposition is sequentially performed on the non-skipped screw hole groups until the residual vector meets the preset requirement.

[0016] Optionally, the second path comprises:

[0017] The vector to be decomposed is super-decomposed to obtain a residual decomposition vector;

[0018] The residual decomposition vector is sequentially subjected to multiple fan-out decompositions until the residual vector obtained meets the preset requirement.

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

[0020] A super-decomposition vector is obtained; 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 a screw hole opposite to the pair of screw holes are selected as super-decomposition screw holes;

[0022] The type of the counterweight screw installed in the super-decomposition screw holes is selected to decompose the super-decomposition vector by an effective weight moment of the counterweight screw in the super-decomposition screw holes, so as to obtain a residual decomposition vector; wherein, the effective weight moment of the counterweight screw in the super-decomposition screw holes is less than or equal to the super-decomposition vector, and the residual decomposition vector is a residual part of the vector to be decomposed after the vector to be decomposed is subtracted by the effective weight moment.

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

[0024] obtaining an unbalance amount borne by the fan during operation of the fan without disassembling an existing screw configuration in a fan plane, and taking a balancing vector for decomposing the unbalance amount as the vector to be decomposed.

[0025] Optionally, after the step of sequentially performing multiple fan opening decompositions to both sides of the vector to be decomposed with the vector to be decomposed as the center until a residual vector meets a preset requirement, the fan weight screw decomposition method of the aero-engine further comprises:

[0026] outputting a fan weight screw decomposition scheme of the aero-engine, the fan weight screw decomposition scheme comprising at least one of a screw hole position requiring replacement of a weight screw, a type of the weight screw installed into the screw hole, a number of weight screws requiring replacement, and a value of the residual vector meeting the preset requirement.

[0027] A fan weight screw decomposition device of an aero-engine, the fan weight screw decomposition device comprising:

[0028] an obtaining module configured to obtain a vector to be decomposed, wherein the vector to be decomposed comprises a vector size and a vector direction;

[0029] an operation module configured to sequentially perform multiple fan opening decompositions to both sides of the vector to be decomposed with the vector to be decomposed as the center until a residual vector meets a preset requirement, wherein in each of the fan opening decompositions, a pair of screw holes located on both sides of the vector to be decomposed and a screw hole opposite to the pair of screw holes are selected as to-be-decomposed screw holes, and at least part of the vector to be decomposed is decomposed by installing weight screws into the to-be-decomposed screw holes; and the residual vector is a vector remaining after the vector to be decomposed is decomposed by an effective weight moment of the weight screws.

[0030] an output module configured to output a fan weight screw decomposition scheme of the aero-engine, the fan weight screw decomposition scheme comprising at least one of a screw hole position requiring replacement of a weight screw, a type of the weight screw installed into the screw hole, a number of weight screws requiring replacement, and a value of the residual vector meeting the preset requirement.

[0031] A readable storage medium having a computer program stored therein, the computer program being executed by a processor to implement the fan weight screw decomposition method of the aero-engine.

[0032] The fan weight screw decomposition method, device, and readable storage medium of the aero-engine provided by the embodiments of the present application have the following beneficial effects:

[0033] Embodiments of the present application provide an aero-engine fan balance weight screw disassembly method, the method comprising: obtaining a vector to be disassembled; wherein the vector to be disassembled comprises a vector size and a vector direction; performing multiple fan disassembly operations in sequence to both sides of the vector to be disassembled with the vector to be disassembled as the center until a residual vector meets a preset requirement; wherein in each fan disassembly operation, a pair of screw holes located on both sides of the vector to be disassembled and a pair of screw holes opposite the pair of screw holes are selected as screw holes to be disassembled, and at least part of the vector to be disassembled is disassembled by installing balance weight screws in the screw holes to be disassembled; and the residual vector is a vector remaining after the vector to be disassembled is disassembled by the effective weight moment of the balance weight screws. Since the screw holes to be disassembled selected in each fan disassembly operation simultaneously comprise a positive side screw hole and an opposite side screw hole, correspondingly, when the fan disassembly operations in sequence are performed, the upper limit of the effective weight moment in a single direction can be effectively increased by the corresponding positive side screw and opposite side screw in reverse weight increasing and decreasing, and the lower limit of the selectable effective weight moment can be effectively reduced by the positive side screw and opposite side screw in same weight increasing and same weight decreasing, the balance precision is improved, the selectability of the scheme is increased, and a scheme with a smaller number of required balance weight screws is helpful.

[0034] Embodiments of the present application also provide an aero-engine fan balance weight screw disassembly device, which adopts a positive side screw hole and an opposite side screw hole as screw holes to be disassembled in one fan disassembly operation, so that the upper limit of the effective weight moment in a single direction can be effectively increased by the corresponding positive side screw and opposite side screw in reverse weight increasing and decreasing, and the lower limit of the selectable effective weight moment can be effectively reduced by the positive side screw and opposite side screw in same weight increasing and same weight decreasing, the balance precision is improved, the selectability of the scheme is increased, and a scheme with a smaller number of required balance weight screws is helpful.

[0035] Embodiments of the present application also provide a readable storage medium, which stores a computer program capable of implementing the aero-engine fan balance weight screw disassembly method described above, and thus has the beneficial effects of improving the balance precision, increasing the selectability of the scheme, and helping to adopt a scheme with a smaller number of required balance weight screws. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above features and advantages of the present application can be better understood by reading the following detailed description of embodiments of the present application in conjunction with the drawings, in which the components are not necessarily drawn to scale and components of similar or identical function or structure can have the same or similar reference numbers.

[0037] Figure 1 A flow chart of an aero-engine fan balance weight screw disassembly method according to an aspect of the present application is shown;

[0038] Figure 2 A disassembly schematic diagram when fan disassembly is performed according to an aspect of the present application is shown. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0040] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

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

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Figure 1 A flowchart illustrating the disassembly method for the aircraft engine fan counterweight screws provided in this embodiment is shown. Please refer to... Figure 1 This embodiment provides a method for disassembling the counterweight screw of an aircraft engine fan. The disassembly of the counterweight screw of an aircraft engine fan is an operation that reduces the vibration response level of the fan by setting the effective weight moment of the counterweight screw on the aircraft engine fan and using the balance vector generated by the effective weight moment to offset the imbalance during the operation of the fan.

[0044] Currently, counterweight screws are available in various models, each corresponding to a different moment of weight. For example, the smallest moment of weight screw is used as a plug for the mounting hole of the balancing screw, while the effective moment of other models of counterweight screws is their own moment of weight minus the smallest moment of weight. The imbalance can be offset by combining different models of counterweight screws.

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

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

[0047] The decomposed vector includes a vector size and a vector direction. Specifically, the decomposed vector is obtained without removing the existing screw configuration in the fan plane, and the decomposed vector is a balance vector used to offset the unbalance amount borne by the fan during operation. Accordingly, in the subsequent process of replacing the counterweight screws to offset the unbalance amount, it is not necessary to remove all the original screws in advance, and the counterweight screws can be directly replaced according to the subsequent fan counterweight screw decomposition scheme.

[0048] S02: Taking the decomposed vector as the center, the fan decomposition is performed on both sides of the decomposed vector.

[0049] In the fan decomposition, the appropriate counterweight screws are arranged in the to-be-decomposed screw holes, and the effective weight moment generated by the counterweight screws is used to decompose at least part of the decomposed vector, so as to reduce the unbalance amount borne by the fan during operation. The residual vector is the residual part of the decomposed vector after the decomposed vector is decomposed by the effective weight moment of the counterweight screws.

[0050] Optionally, the preset requirement can be set as: all the screw holes that can be used as the to-be-decomposed screw holes are subjected to the fan decomposition; or after only part of the screw holes that can be used as the to-be-decomposed screw holes are subjected to the 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 the to-be-decomposed screw holes, it is considered that the residual vector meets the preset requirement.

[0051] Figure 2 A decomposition schematic diagram in the fan decomposition is shown. Please refer to Figure 2 After the decomposed vector 20 is obtained, the fan plane 10 can be divided into a positive side plane 11 and an opposite side plane 12 according to the position of the decomposed vector 20. The positive side plane 11 and the opposite side plane 12 are respectively semicircular, and the side where the decomposed vector 20 is located is the positive side plane 11, and the side opposite to the decomposed vector 20 is the opposite side plane 12.

[0052] In the fan decomposition, two screw holes located on both sides of the decomposed vector 20 and the screw holes opposite to the two screw holes are selected as the to-be-decomposed screw holes 30. In other words, the number of the to-be-decomposed screw holes 30 selected in each fan decomposition is four. For the fan plane with a total number of balance screw mounting holes n, at most floor(n / 4) times of fan decomposition can be performed, and the number of the screws that can be used as the to-be-decomposed screw holes 30 is at most 4floor(n / 4).

[0053] The four screw holes to be decomposed 30 in each fan opening decomposition form 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 line connecting 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 line connecting the first positive side screw hole 31 and the first opposite side screw hole 32 is the first radial line 13, and the line connecting the second positive side screw hole 33 and the second opposite side screw hole 34 is the second radial line 14.

[0054] When performing fan opening decomposition, the required decomposition vector 20 is decomposed into the first radial line 13 and the second radial line 14 to obtain the first component vector 21 and the second component vector 22. After at least partial decomposition of the first component vector 21 by installing counterweight screws in the first positive side screw hole 31 and the first opposite side screw hole 32, the first residual component vector 41 is obtained. 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 screws in the first screw hole pair. After at least partial decomposition of the second component vector 22 by installing counterweight screws in the second positive side screw hole 33 and the second opposite side screw hole 34, the second residual component vector 42 is obtained. In other words, the second residual component vector 42 is the difference between the second component vector 22 and the effective weight moment generated by the counterweight screws in the second screw hole pair. The residual vector 40 is obtained by combining the first residual component vector 41 and the second residual component vector 42.

[0055] In order to minimize the number of counterweight screws used for decomposing the required decomposition vector, that is, to minimize the number of counterweight screw replacements, when performing fan opening decomposition, the component subtraction of the vector is performed using counterweight screws with larger effective weight moments. That is, by selecting the installation scheme of the counterweight screw type 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 type 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 selected screw holes to be decomposed contain both positive side screw holes and opposite side screw holes in each fan opening decomposition, correspondingly, when performing sequential fan opening decomposition, the upper limit of the effective weight moment in a single direction can be effectively increased by reversing the increase and decrease of the corresponding positive side screw and opposite side screw, and the lower limit of the selectable effective weight moment can be effectively reduced by increasing and decreasing the positive side screw and opposite side screw, thereby improving the balancing accuracy and increasing the selectability of the scheme, which is helpful to adopt a scheme with fewer required counterweight screw replacements.

[0057] Further, in the specific implementation of step S02, the first path and / or the second path can be implemented, and different weight screw disassembly schemes can be obtained when the implementation is performed according to different paths. Accordingly, if the implementation is performed according to multiple paths, more comprehensive weight screw disassembly schemes can be obtained, which is helpful to obtain a better scheme.

[0058] Specifically, the first path includes:

[0059] S11: According to the vector position to be disassembled, the screw holes on the fan plane are divided into a plurality of independent screw hole groups, each screw hole group including two screw holes on both sides of the vector to be disassembled and a screw hole opposite to the two screw holes. Specifically, for a fan plane with a total number of n balance screw mounting holes, at most floor(n / 4) screw hole groups can be obtained, each of which can be used as a screw hole to be disassembled in a one-time fan opening disassembly.

[0060] S12: Set the number of skipped screw hole groups. The skipped screw hole groups do not need to be subjected to fan opening disassembly. For example, if the number of skipped screw hole groups is set to 3, the number of fan opening disassembly actually performed in the implementation of step S02 according to the first path is at most floor(n / 4)-3.

[0061] Specifically, the number of set skipped screw hole groups should be less than floor(n / 4), i.e., the number of set skipped screw hole groups is 0-(floor(n / 4)-1). If the number of set skipped screw hole groups is 0, at most all screw hole groups can be subjected to fan opening disassembly.

[0062] S13: In the direction away from the vector to be disassembled, the unskipped screw hole groups are subjected to fan opening disassembly in sequence until the residual vector meets the preset requirement.

[0063] That is, the unskipped screw hole groups are subjected to fan opening disassembly in sequence in the direction away from the vector to be disassembled along the circumferential direction of the fan plane (including the clockwise direction and the counterclockwise direction) with the position of the vector to be disassembled as the starting point. The unskipped screw hole groups can be randomly selected according to the number of set skipped screw hole groups. In other words, each time the fan opening disassembly is performed, the selected screw hole group to be disassembled is the screw hole group closest to the disassembly vector and not disassembled and not skipped.

[0064] Specifically, the second path includes:

[0065] S21: Super-disassemble the vector to be disassembled to obtain a residual disassembly vector.

[0066] The step of super-disassembling the vector to be disassembled includes:

[0067] An over-decomposition vector is obtained by multiplying the vector to be decomposed by an over-decomposition coefficient. The value of the over-decomposition coefficient should be greater than 1, that is, the over-decomposition vector is a vector with a value greater than the vector to be decomposed and the same direction as the vector to be decomposed. Alternatively, the value of the over-decomposition coefficient is greater than 1 and less than or equal to 1.2. Specifically, the value of the over-decomposition coefficient can be set to 1.05, 1.1, or 1.2.

[0068] The pair of screw holes closest to the vector to be decomposed and the screw hole opposite to the pair of screw holes are taken as over-decomposition screw holes.

[0069] The type of counterweight screw installed in the over-decomposition screw hole is selected, and the vector to be decomposed is decomposed by the effective weight moment of the counterweight screw in the over-decomposition screw hole to obtain a 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 over-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 residual part after the vector to be decomposed is subtracted by the effective weight moment, so the direction of the residual decomposition vector may be the same as or opposite to the direction of the vector to be decomposed.

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

[0071] It should be noted that in the description of the present embodiment, the direction of the residual decomposition vector opposite to the direction of the vector to be decomposed should be understood in a broad sense. In the case where the vector to be decomposed is located in the positive side plane 11, the direction of the residual decomposition vector 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 is not necessarily 180° different from the direction of the vector to be decomposed. Correspondingly, the direction of the residual decomposition vector 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, and does not necessarily mean that the residual decomposition vector coincides with the vector to be decomposed.

[0072] S22: The residual decomposition vector is sequentially subjected to multiple fan decomposition until the obtained residual vector meets the preset requirement.

[0073] Specifically, multiple fan decompositions can be performed according to the steps of the first path, and in the execution process, the residual decomposition vector is taken as the vector to be decomposed. Moreover, when multiple fan decompositions are performed according to the steps of the first path, the screw hole having undergone step S21 can be considered as an undecomposed screw hole.

[0074] The method for decomposing the fan balance weight screw of the aero-engine provided in the embodiment can obtain a plurality of vector decomposition schemes through step S02, and therefore the method for decomposing the balance weight screw of the aero-engine can further include the following step in the embodiment:

[0075] S03: outputting the fan balance weight screw decomposition scheme of the aero-engine.

[0076] The fan balance weight screw decomposition scheme of the aero-engine includes at least one of the screw hole positions that need to be replaced with balance weight screws, the types of the balance weight screws installed in the screw holes, the number of the balance weight screws that need to be replaced, and the value of the residual vector that meets the preset requirement. Specifically, in the embodiment, the fan balance weight screw decomposition scheme of the aero-engine includes the screw hole positions that need to be replaced with balance weight screws, the types of the balance weight screws installed in the screw holes, the number of the balance weight screws that need to be replaced, and the value of the residual vector that meets the preset requirement.

[0077] After obtaining a plurality of fan balance weight screw decomposition schemes of the aero-engine, the optimal solution can be selected by comprehensively considering factors such as the fan balancing requirement of the aero-engine, the number of screw replacement, and the value of the residual vector. For example, the optimal solution can be one that has the smallest residual vector that meets the fan balancing requirement of the aero-engine and has the smallest number of screw replacement. It can be understood that in some other embodiments, the proportion of the consideration factors for selecting the optimal solution from a plurality of fan balance weight screw decomposition schemes of the aero-engine can be preset according to requirements, so as to directly output the optimal solution.

[0078] Embodiments of the present application also provide an aero-engine fan balance weight screw decomposition device, and the aero-engine fan balance weight screw decomposition method described above can be implemented based on the aero-engine fan balance weight screw decomposition device. The aero-engine fan balance weight screw decomposition device includes an acquisition module, an operation module, and an output module.

[0079] The acquisition module is configured to acquire a vector to be decomposed, wherein the vector to be decomposed includes a vector size and a vector direction.

[0080] The operation module is configured to perform a plurality of fan decomposition operations on both sides of the vector to be decomposed in sequence with the vector to be decomposed as the center until a residual vector meets a preset requirement. In each fan decomposition operation, a pair of screw holes located on both sides of the vector to be decomposed and the screw holes on the opposite side 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 balance weight screws in the screw holes to be decomposed; the residual vector is a vector that remains after the vector to be decomposed is decomposed by the effective weight moment of the balance weight screws.

[0081] The output module is configured to output an aero-engine fan balance weight screw disassembly scheme, which includes screw hole positions requiring balance weight screw replacement, types of balance weight screws installed in the screw holes, and values of residual vectors meeting preset requirements.

[0082] The output aero-engine fan balance weight screw disassembly scheme can be multiple, and a subsequent worker can select an optimal solution therefrom according to requirements, or the optimal solution can be directly output

[0083] The embodiments of the present application also provide a readable storage medium. Based on the understanding, the present application implements all or part of the processes in the above-mentioned embodiment methods, and can also be implemented by a computer program instructing related hardware. The computer program exists in the readable storage medium, and the computer program can implement the steps in the above-mentioned aero-engine fan balance weight screw disassembly method when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form. The computer readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included 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 electrical carrier signals and telecommunication signals.

[0084] The aero-engine fan balance weight screw disassembly method, device, and readable storage medium provided by the embodiments of the present application can select and replace the positions and types of all fan screws without removing the existing screw configuration, reduce the complexity and experience dependence of disassembly, and have a larger disassembly range of balance weight screws, reduce the balance weight screw disassembly ladder, and help improve the balance accuracy. Moreover, the super disassembly path is provided, and the skipping of part of the screw hole groups is allowed, so that more comprehensive aero-engine fan balance weight screw disassembly schemes can be obtained, and a balance weight screw replacement number and a residual vector are smaller.

[0085] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. An aircraft engine fan balance screw disassembly method, characterized by, The aero-engine fan balance screw decomposition method comprises: obtaining a vector to be decomposed; wherein the vector to be decomposed comprises a vector size and a vector direction; performing multiple open-fan decompositions in sequence to both sides of the vector to be decomposed with the vector to be decomposed as the center until a residual vector meets a preset requirement; wherein a pair of screw holes located on both sides of the vector to be decomposed and a screw hole opposite to the pair of screw holes are selected as screw holes to be decomposed in each open-fan decomposition, and at least part of the vector to be decomposed is decomposed by installing a balance screw in the screw holes to be decomposed; the residual vector is a part of the vector to be decomposed remaining after the vector to be decomposed is decomposed by an effective weight moment of the balance screw.

2. The aircraft engine fan balance screw disassembly method of claim 1, wherein, The step of performing multiple open-fan decompositions in sequence to both sides of the vector to be decomposed with the vector to be decomposed as the center until a residual vector meets a preset requirement is performed according to a first path and / or a second path; The first path comprises: dividing screw holes on a fan plane into multiple independent screw hole groups according to the position of the vector to be decomposed, each screw hole group comprising two screw holes located on both sides of the vector to be decomposed and a screw hole opposite to the two screw holes; setting a number of skipped screw hole groups; wherein the skipped screw hole groups do not need to be subjected to open-fan decomposition; performing open-fan decompositions in sequence to unskipped screw hole groups in a direction away from the vector to be decomposed until a residual vector meets a preset requirement; The second path comprises: super-decomposing the vector to be decomposed to obtain a residual decomposition vector; performing multiple open-fan decompositions in sequence to the residual decomposition vector until a residual vector obtained meets a preset requirement.

3. The aircraft engine fan balance screw disassembly method of claim 2, wherein, 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; selecting a pair of screw holes closest to the vector to be decomposed and a screw hole opposite to the pair of screw holes as super-decomposition screw holes; selecting a model of a balance screw installed in the super-decomposition screw holes to decompose the super-decomposition vector by an effective weight moment of the balance screw in the super-decomposition screw holes to obtain a residual decomposition vector; wherein the effective weight moment of the balance screw in the super-decomposition screw holes is less than or equal to the super-decomposition vector, and the residual decomposition vector is a part of the vector to be decomposed remaining after the vector to be decomposed is subtracted by the effective weight moment.

4. The aircraft engine fan balance screw disassembly method of claim 1, wherein, The step of obtaining a vector to be decomposed comprises: obtaining an unbalance amount borne by a fan during fan operation without removing an existing screw configuration in a fan plane, and taking a balance vector for decomposing the unbalance amount as the vector to be decomposed.

5. The aircraft engine fan balance screw disassembly method of claim 1, wherein, After the step of performing multiple open-fan decompositions in sequence to both sides of the vector to be decomposed with the vector to be decomposed as the center until a residual vector meets a preset requirement, the aero-engine fan balance screw decomposition method further comprises: outputting an aero-engine fan balance screw decomposition scheme, the aero-engine fan balance screw decomposition scheme comprising screw hole positions requiring balance screw replacement, a model of a balance screw installed in the screw holes, and a value of a residual vector meeting a preset requirement.

6. An aircraft engine fan balance weight screw disassembly device, characterized by, The aero-engine fan balance weight screw disassembly device comprises: An acquisition module is configured to acquire a vector to be disassembled, wherein the vector to be disassembled comprises a vector size and a vector direction; An operation module is configured to perform multiple fan opening disassemblies in sequence to both sides of the vector to be disassembled with the vector to be disassembled as a center until a residual vector meets a preset requirement, wherein a pair of screw holes located on both sides of the vector to be disassembled and a screw hole opposite to the pair of screw holes are selected as screw holes to be disassembled in each fan opening disassembly, and the vector to be disassembled is disassembled by installing balance weight screws in the screw holes to be disassembled; and the residual vector is a vector remaining after the vector to be disassembled is disassembled by an effective weight moment of the balance weight screws An output module is configured to output an aero-engine fan balance weight screw disassembly scheme, wherein the aero-engine fan balance weight screw disassembly scheme comprises at least one of a screw hole position requiring balance weight screw replacement, a model of a balance weight screw installed in the screw hole, a number of balance weight screws requiring replacement, and a value of a residual vector meeting the preset requirement.

7. A readable storage medium characterized by, The readable storage medium stores a computer program, and the computer program is executed by a processor to implement the aero-engine fan balance weight screw disassembly method according to any one of claims 1-5.

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