An adjustable cable blind installation assembly evaluation device and method

Abstract

This application belongs to the field of aero-engine assembly, and relates to an adjustable cable blind-mounting assembly evaluation device and method, which includes a bottom plate, a mounting seat, a second conduit, and a cover plate. The bottom plate is of a rectangular structure and is horizontally arranged. The mounting seat includes a first mounting seat, a second mounting seat, and a third mounting seat. The first mounting seat, the second mounting seat, and the third mounting seat are all bolted to the bottom plate. The second mounting seat is arranged between the first mounting seat and the third mounting seat. The first mounting seat is inclined or perpendicular to the second mounting seat, and the second mounting seat is arranged side by side with the third mounting seat. During assembly, as long as the cable can pass through the first mounting seat and the second conduit in sequence under the blind-mounting structure, it represents successful assembly; through simulated assembly, the rationality of the cable installation plan can be verified through actual operation, and the assembly performance can be evaluated, so that the optimal installation plan for the corresponding engine can be quickly found, and the characteristic structure affecting cable assembly can fully simulate the actual assembly situation.

Description

Technical Field

[0001] The present application relates to the field of aero-engine assembly, and in particular to an adjustable blind cable assembly evaluation device and method. Background Art

[0002] When an aircraft turbofan engine is operating, air enters the inner and outer ducts, accelerates, and exits through the outlet, generating thrust. The inner and outer ducts provide a continuous passage for the airflow. The bearing casing houses the rotor support structure and pivot oil chamber within the inner duct, along with sensors for measuring rotor vibration and speed. Sensor cables must pass through the inner and outer ducts to connect to external electrical equipment. Hollow support plates, evenly spaced circumferentially between the inner and outer duct walls, serve as force transmission components and also as passages for the sensor cables. To ensure the tightness of the oil chamber and the working environment of the cables, the cable passages in the bearing casing are isolated from the oil chambers. Support plate 1 forms a closed cavity within the interior of support plate 1. A first conduit 4 is located within support plate 1. Therefore, cable 3 enters the casing from the inner cavity, first passing through a support 2 within support plate 1. After a blind assembly operation, it passes through the opening guide structure of the first conduit 4, through another support 2 and the first conduit 4, and finally exits support plate 1. However, cable 3, originating from the front, must change direction within support plate 1, significantly increasing assembly complexity. The layout of the support 2 and the first conduit 4 in the support plate 1 and the design of other related assembly guide structures directly affect the assembly of the cable 3. Figure 1 The cable structure, diameter, and internal structure of the load-bearing housing must be determined during the conceptual design phase to ensure cable assembly. Otherwise, the load-bearing housing typically uses a one-piece casting structure, which is difficult to manufacture. If poor assembly is discovered during assembly, it is difficult to modify. Therefore, it is necessary to evaluate its assembly performance during conceptual design and detailed coordinated design to avoid subsequent structural adjustments.

[0003] To address the assembly issues associated with blind cable installation in enclosed spaces, existing technical solutions involve using CAD software to perform simple two-dimensional / three-dimensional model simulations during the design process to verify whether the given cable diameter and minimum bending radius can be arranged within the confined space. However, this simulation is limited to the final assembly state and cannot simulate the feasibility of the assembly process. Therefore, when the assembly space margin is small and the cable bending radius is large (i.e., the cable is rigid and difficult to bend), the deviation between the results obtained by existing simulation methods and the actual assembly situation may result in the cable being unable to be assembled during actual assembly. In this case, corresponding changes need to be made to the completed design and processing, which in turn has varying degrees of impact on the product development cost and cycle time. In particular, the load-bearing frames of gas turbine engines are often processed using integral precision casting of titanium alloys or high-temperature alloys. Once the casting mold is modified, the cost and cycle time will increase significantly.

[0004] Therefore, how to accurately evaluate the actual assembly performance of cables is a problem that needs to be solved. Summary of the Invention

[0005] The object of the present application is to provide an adjustable cable blind - mounting assembly evaluation device and method to solve the problem that the assembly of cables blindly mounted in a cavity cannot be accurately evaluated in the prior art.

[0006] The technical solution of the present application is: an adjustable cable blind - mounting assembly evaluation device, including a bottom plate, a mounting seat, a conduit and a cover plate; the bottom plate is horizontally arranged, the mounting seat includes a first mounting seat, a second mounting seat and a third mounting seat, the first mounting seat, the second mounting seat and the third mounting seat are all bolt - connected to the bottom plate, the second mounting seat is arranged between the first mounting seat and the third mounting seat, the first mounting seat and the second mounting seat are arranged obliquely or vertically, the second mounting seat and the third mounting seat are arranged side by side, circular through - holes are correspondingly arranged in the first mounting seat, the second mounting seat and the third mounting seat, the conduit is installed in the circular through - hole between the second mounting seat and the third mounting seat, the cover plate is covered above the first mounting seat and the second mounting seat to form a blind - mounting structure therebetween, the cable can be inserted into the first mounting seat and assembled into the second conduit, and then extended from one end of the third mounting seat.

[0007] Preferably, first long slots are opened at positions on both sides of the bottom plate corresponding to the first mounting seat, the second mounting seat and the third mounting seat, second long slots are opened on both sides of the first mounting seat, the second mounting seat and the third mounting seat, the first long slot and the adjacent second long slot are arranged obliquely or vertically, and the first long slot and the adjacent second long slot are bolt - connected.

[0008] As a specific implementation manner, an adjustable cable blind - mounting assembly evaluation method, using the above - mentioned evaluation device, includes:

[0009] Respectively set the lateral distance m, the longitudinal distance n of the first mounting seat and the included angle A between the first mounting seat and the second mounting seat; obtain the parameter change ranges of the lateral distance m, the longitudinal distance n and the included angle A according to the same or similar engine design parameters;

[0010] Set the included - angle difference value, divide the parameter change range of the included angle A into a plurality of evenly - spaced included - angle test points through the included - angle difference value; select one of the included - angle test points and install the first mounting seat on the bottom plate according to the corresponding included angle A;

[0011] Set the difference between the horizontal distance m and the vertical distance n, and split the horizontal distance m and the vertical distance n respectively to form multiple horizontal distance nodes and vertical distance nodes. Then, keep one of the horizontal distance nodes unchanged, and move the first mounting seat to one of the vertical distance nodes respectively for cable assembly tests to determine whether the cable can be assembled successfully. If it can be assembled successfully, further count the difficulty level of assembly. At least three or more cable assembly tests should be carried out under the same horizontal distance m, vertical distance n and included angle A;

[0012] Keep the horizontal distance m and the included angle A unchanged, move the first mounting seat to different vertical distance nodes respectively, and conduct cable assembly tests respectively to collect assembly data. Then, move the first mounting seat to different included angle test points, horizontal distance nodes and vertical distance nodes respectively for cable assembly tests to obtain all the assembly data that can be assembled successfully;

[0013] Analyze multiple groups of successfully assembled assembly data, match them with the corresponding engine according to the difficulty level and spatial position, and determine the final assembly plan.

[0014] Preferably, when conducting cable assembly tests, first remove the cover plate and assemble the cable in a visible environment; after finding the optimal assembly position, then cover it with the cover plate for blind assembly tests and verify the assembly performance at the optimal assembly position.

[0015] An adjustable cable blind assembly performance evaluation device and method of the present application include a bottom plate, a mounting seat, a second conduit and a cover plate. The bottom plate is a rectangular structure and is horizontally arranged. The mounting seat includes a first mounting seat, a second mounting seat and a third mounting seat. The first mounting seat, the second mounting seat and the third mounting seat are all bolted to the bottom plate. The second mounting seat is arranged between the first mounting seat and the third mounting seat. The first mounting seat is inclined or perpendicular to the second mounting seat, and the second mounting seat is arranged side by side with the third mounting seat. During assembly, as long as the cable can pass through the first mounting seat and the second conduit in the blind assembly structure in sequence, it represents successful assembly; through simulated assembly, the rationality of the cable installation plan can be verified by actual operation, and the assembly performance can be evaluated, so that the optimal installation plan for the corresponding engine can be quickly found. The structure of this device is simple, and the characteristic structures affecting cable assembly can fully simulate the actual assembly situation. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions provided by the present application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

[0017] Figure 1 It is a schematic diagram of cable assembly in a closed cavity structure in the prior art;

[0018] Figure 2It is a schematic structural diagram for visual assembly of this application;

[0019] Figure 3 It is a schematic structural diagram of the blind assembly type of this application.

[0020] 1. Support plate; 2. Support; 3. Cable; 4. First conduit; 5. Bottom plate; 6. First mounting seat; 7. Second mounting seat; 8. Third mounting seat; 9. Second conduit; 10. Cover plate; 11. First long hole; 12. Second long hole. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] An adjustable cable blind assembly evaluation device, as Figure 2-3 shown, includes a bottom plate 5, a mounting seat, a second conduit 9 and a cover plate 10.

[0023] The bottom plate 5 is of a rectangular structure and is horizontally arranged. The mounting seat includes a first mounting seat 6, a second mounting seat 7 and a third mounting seat 8. The first mounting seat 6, the second mounting seat 7 and the third mounting seat 8 are all bolted to the bottom plate 5. The second mounting seat 7 is arranged between the first mounting seat 6 and the third mounting seat 8. The first mounting seat 6 is inclined or perpendicular to the second mounting seat 7, and the second mounting seat 7 is arranged side by side with the third mounting seat 8.

[0024] Circular through holes are respectively provided in the first mounting seat 6, the second mounting seat 7 and the third mounting seat 8. The second conduit 9 is installed in the circular through hole between the second mounting seat 7 and the third mounting seat 8. The cover plate 10 is covered above the first mounting seat 6 and the second mounting seat 7 to form a blind assembly structure between the first mounting seat 6 and the second mounting seat 7. The cable 3 can be inserted into the first mounting seat 6 and assembled into the second conduit 9, and then extend out from one end of the third mounting seat 8.

[0025] The bottom plate 5 is used to simulate the inner wall of the load-bearing casing. The first mounting seat 6, the second mounting seat 7, and the third mounting seat 8 are used to respectively simulate the two supports 2 inside the engine and the outer ends of the support plates 1. The second conduit 9 is used to simulate the second conduit 9 inside the engine support plate 1. An opening guiding structure identical to that inside the engine is provided at one end of the second conduit 9 close to the first mounting seat 6. The sizes of the first mounting seat 6, the second mounting seat 7, and the third mounting seat 8 can all be set in a 1:1 ratio according to the corresponding engine type. For different cable 3 diameters under different engines, the mounting seats and the second conduit 9 can be made into multiple groups with different hole diameters to be applicable to different types of engines.

[0026] The cable 3 uses the actually used cable 3. As long as the cable 3 can sequentially pass through the first mounting seat 6 and the second conduit 9 under the blind mounting structure, it represents a successful assembly; otherwise, the assembly fails. The cable 3 is assembled according to the existing operating methods during the assembly process to ensure the authenticity of the simulation and is recorded as an installation note if necessary.

[0027] By performing simulated assembly, the rationality of the cable 3 installation plan can be verified through actual operation, and the assemblability can be evaluated, so that the optimal installation plan for the corresponding engine can be quickly found. The structure of this device is simple, and the characteristic structures affecting the cable 3 assembly can fully simulate the actual assembly situation, and the assemblability problems that may exist between the cable 3 and the casing structure can be solved in advance. The present invention can provide accurate assemblability evaluation results for the structures of the cable 3 and the load-bearing casing, reducing the waste of the development cycle and cost.

[0028] Preferably, first long holes 11 are provided at positions on both sides of the bottom plate 5 corresponding to the first mounting seat 6, the second mounting seat 7, and the third mounting seat 8. Second long holes 12 are provided on both sides of the first mounting seat 6, the second mounting seat 7, and the third mounting seat 8. The first long holes 11 are inclined or perpendicular to the adjacent second long holes 12, and the first long holes 11 and the adjacent second long holes 12 are connected by bolts.

[0029] In this way, the first mounting seat 6, the second mounting seat 7, and the third mounting seat 8 can, on the one hand, adjust their positions according to different engine types, and at the same time, by respectively adjusting different positions of the mounting seats, the optimal assembly plan for the cable 3 can be quickly found through actual operation.

[0030] As a specific implementation manner, it further includes an adjustable cable 3 blind mounting assemblability evaluation method, which includes the following steps:

[0031] Step 1: Set the horizontal distance m, the vertical distance n of the first mounting seat 6, and the included angle A between the first mounting seat 6 and the second mounting seat 7 respectively; obtain the parameter variation ranges of the horizontal distance m, the vertical distance n, and the included angle A given by the same or similar engine design parameters; for different types of engines, there are different parameter variation ranges.

[0032] Step 2: Set the included angle A difference value, divide the parameter variation range of the included angle A into a uniform number of included angle test points through the included angle difference value; select one of the included angle test points, and install the first mounting seat 6 on the bottom plate 5 according to the corresponding included angle A; if the included angle range is 30 - 60°, and the difference value is set to 10°, then a total of 4 included angle test points of 30°, 40°, 50°, and 60° can be formed. The selection of the difference values of the horizontal distance m and the vertical distance n is similar, and will not be elaborated here.

[0033] Step 3: Set the difference values of the horizontal distance m and the vertical distance n, split the horizontal distance m and the vertical distance n respectively to form a plurality of horizontal distance nodes and vertical distance nodes, then keep one of the horizontal distance nodes unchanged, and move the first mounting seat 6 to one of the vertical distance node positions respectively to conduct the cable 3 assembly test, and judge whether the cable 3 can be assembled successfully. If it can be assembled successfully, further count the assembly difficulty level. At least three or more cable 3 assembly tests should be conducted under the same horizontal distance m, vertical distance n, and included angle A; preferably, set an assembly difficulty rating table, set 1 - 5 levels from easy to difficult, the more difficult the assembly, the higher the level, to facilitate subsequent evaluation.

[0034] Step 4: Keep the horizontal distance m and the included angle A unchanged, move the first mounting seat 6 to different vertical distance nodes respectively, and conduct the cable 3 assembly test respectively to collect the assembly data; then move the first mounting seat 6 to different included angle test points, horizontal distance nodes, and vertical distance nodes respectively to conduct the cable 3 assembly test to obtain all the assembly data that can be assembled successfully;

[0035] Step 5: Analyze multiple groups of successfully assembled assembly data, match according to the difficulty level and spatial position with the corresponding engine, and determine the final assembly plan.

[0036] In the actual assembly process, there are often only a few schemes that can successfully assemble the cable 3. Therefore, after confirming the assembly difficulty of a certain scheme, the next scheme can be directly selected for assembly without the need for multiple assemblies to improve efficiency.

[0037] By conducting assemblies at all nodes within the assembly range, the required optimal assembly plan can be accurately found.

[0038] Preferably, when conducting the cable 3 assembly test, first remove the cover plate 10, assemble the cable 3 in a visible environment; after finding the optimal assembly position, then use the cover plate 10 to block it, conduct a blind assembly test, and verify the assembly performance at the optimal assembly position. By performing the visualization operation first, it is possible to quickly find more appropriate assembly parameters, reduce the assembly plan, improve the assembly efficiency, and at the same time, it is more conducive to mastering the operation method during actual assembly under visible conditions.

[0039] This application has been applied in the development of a certain type of turbofan engine. In the improved design of the intermediate case scheme of the engine, the installation structure of the cable 3 inside the strut 1 was adjusted. The assembly performance was evaluated in the scheme design stage using the present invention, and the relevant structural scheme was determined. During the subsequent physical assembly, the assembly was successful at one time, promoting the smooth progress of the model development work.

[0040] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0041] Second: In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0042] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable cable blind installation assembly evaluation device, characterized in that: It includes a bottom plate (5), a mounting base, a second conduit (9) and a cover plate (10); the bottom plate (5) is horizontally arranged, the mounting base includes a first mounting base (6), a second mounting base (7) and a third mounting base (8), the first mounting base (6), the second mounting base (7) and the third mounting base (8) are all bolted to the bottom plate (5), the second mounting base (7) is arranged between the first mounting base (6) and the third mounting base (8), the first mounting base (6) and the second mounting base (7) are arranged obliquely or vertically, the second mounting base (7) and the third mounting base (8) are arranged side by side, circular through holes are correspondingly formed in the first mounting base (6), the second mounting base (7) and the third mounting base (8), the second conduit (9) is installed in the circular through hole between the second mounting base (7) and the third mounting base (8), the cover plate (10) is covered above the first mounting base (6) and the second mounting base (7) to form a blind mounting structure between the first mounting base (6) and the second mounting base (7), the cable (3) can be inserted into the first mounting base (6) and assembled into the second conduit (9), and then extends out from one end of the third mounting base (8).

2. The adjustable cable blind assembly evaluation device according to claim 1, characterized in that: First long holes (11) are formed at positions on both sides of the bottom plate (5) corresponding to the first mounting base (6), the second mounting base (7) and the third mounting base (8), second long holes (12) are formed on both sides of the first mounting base (6), the second mounting base (7) and the third mounting base (8), the first long holes (11) and the adjacent second long holes (12) are arranged obliquely or vertically, and the first long holes (11) and the adjacent second long holes (12) are bolted together.

3. An adjustable cable blind installation assembly evaluation method, using the evaluation device described in any one of claims 1-2, characterized in that, It includes: The horizontal distance m, the vertical distance n of the first mounting base (6) and the included angle A between the first mounting base (6) and the second mounting base (7) are respectively set; the parameter change ranges of the horizontal distance m, the vertical distance n and the included angle A are obtained according to the same or similar engine design parameters; The included angle A difference is set, and the parameter change range of the included angle A is divided into a plurality of uniform included angle test points through the included angle difference; one of the included angle test points is selected, and the first mounting base (6) is mounted on the bottom plate (5) according to the corresponding included angle A; The horizontal distance m and the vertical distance n differences are set, the horizontal distance m and the vertical distance n are respectively split to form a plurality of horizontal distance nodes and vertical distance nodes, then one of the horizontal distance nodes is selected to remain unchanged, and the first mounting base (6) is respectively moved to one of the vertical distance node positions for the cable (3) assembly test to judge whether the cable (3) can be successfully assembled. If it can be successfully assembled, the assembly difficulty level is further statistically analyzed. At least three cable (3) assembly tests are carried out under the same horizontal distance m, vertical distance n and included angle A; Keep the horizontal distance m and the included angle A unchanged, move the first mounting seat (6) to different longitudinal distance nodes respectively, and conduct cable (3) assembly tests respectively to collect assembly data; then move the first mounting seat (6) to different included angle test points, horizontal distance nodes and longitudinal distance nodes respectively to conduct cable (3) assembly tests to obtain all the assembly data that can be successfully assembled. Analyze multiple groups of successfully assembled assembly data, match them with the corresponding engines according to the difficulty level and spatial position, and determine the final assembly plan.

4. The adjustable cable blind installation assembly evaluation method according to claim 3, wherein: When conducting the cable (3) assembly test, first remove the cover plate (10), assemble the cable (3) in a visible environment; after finding the optimal assembly position, then use the cover plate (10) to block it, conduct a blind assembly test, and verify the assembly performance at the optimal assembly position.

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