An operation guiding method for aircraft engine practical teaching

Abstract

The application discloses an operation guiding method for aircraft engine practical training teaching, and relates to the field of somatosensory interaction technology, and comprises the following steps: based on the circumferential angle data, the end position of the spring adapter, the wave tooth position of the spring and the hole along position of the oil leakage hole are arranged in an unfolded manner to obtain spring ring groove unfolding data; the free end process position corresponding to the free end position of the inner side of the laminated pressure is unfolded and mapped and sequentially arranged to obtain a laminated tooth hole migration chain; the visible scraper segment position and the driven wave tooth position are unfolded and mapped to obtain a scraper removal part; the free end position of the inner side of the laminated pressure is marked in a backward direction to obtain a laminated tooth backward direction; the laminated tooth hole migration chain is removed in sequence according to the scraper removal part and the laminated tooth backward direction; the student visual angle step sequence is obtained according to the laminated tooth hole migration chain removal sequence, and the operation guiding of the oil ring spring removal operation of the practical training personnel is carried out; and the application improves the standardization in the practical training teaching process of the aircraft engine.

Description

Technical Field

[0001] This invention relates to the field of motion-sensing interaction technology, and in particular to an operation guidance method for practical training in aircraft engines. Background Technology

[0002] As aircraft engine manufacturing processes continue to advance towards precision and intelligence, the teaching requirements for piston oil ring assembly and disassembly in aircraft engine practical training are constantly increasing. As a crucial sealing component in the piston assembly of an aircraft engine, the piston oil ring typically consists of a scraper, a spring bushing, and an oil ring groove structure. The spring bushing, through its own elasticity, supports the scraper, allowing the oil ring to conform to the cylinder wall and control oil flow. In aircraft engine maintenance training, vocational skills training, and aircraft engine assembly instruction, trainees need to master the installation, adjustment, and release of the oil ring bushing, especially when the bushing joint overlaps or the free end enters the drain hole area. The release process must be completed according to the correct direction of movement and operating sequence. Because the oil ring bushing structure is located inside the oil ring groove, the joint position, free end movement path, and scraper contact area in the overlapped tooth and hole release state are highly concealed. Trainees find it difficult to directly observe changes in the internal structure of the bushing, leading to reliance on verbal explanations or manual demonstrations from experienced instructors during actual teaching, making it difficult to develop intuitive and accurate operational guidance.

[0003] Existing training methods for aircraft engine oil rings typically rely on manual observation, video demonstrations, or fixed step-by-step instructions to address the issue of unwinding oil ring and spring backlashes. However, these methods often fail to generate corresponding operational paths based on the actual assembly state of the oil ring and spring backlashes. This is particularly problematic during processes such as spring backlash joint overlap, free end entry into the drain hole, and blade movement. Existing methods struggle to accurately determine the unwinding sequence and direction of movement between components, leading to errors in operational positioning, confusion in the unwinding sequence, and damage to the spring backlash structure. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies that make it difficult to accurately determine the release sequence and movement direction between components, and to propose an operation guidance method for practical training in aircraft engines.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: An operational guidance method for practical training in aircraft engines includes: S1. Determine the circumferential angle data based on the image of the oil ring groove area of ​​the aircraft engine piston and the piston structure calibration data; based on the circumferential angle data, unfold and arrange the end position of the spring bushing joint, the position of the spring bushing teeth and the position of the oil drain hole to obtain the unfolded data of the spring bushing groove. S2. Based on the unfolded data of the spring ring groove, obtain the position of the free end on the inner side of the stack; unfold and map the free end process positions corresponding to the positions on the inner side of the stack and arrange them in order to obtain the tooth entry hole migration chain. S3. Based on the overlapping tooth entry hole migration chain, extract the position of the visible scraper segment and the position of the driven wave tooth, and expand and map the position of the visible scraper segment and the position of the driven wave tooth to obtain the scraper removal part. S4. Mark the retraction direction of the free end position on the inner side of the stack to obtain the retraction direction of the stacked teeth; based on the scraper removal part and the retraction direction of the stacked teeth, obtain the retraction release sequence of the stacked teeth entry hole; S5. Based on the retraction release sequence of the overlapping teeth and the hole, obtain the step sequence from the student's perspective, and provide operational guidance for the trainees on the retraction release operation of the oil ring bushing.

[0006] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention acquires images of the oil ring groove area of ​​an aircraft engine piston and piston structure calibration data, extracts the position of the spring bushing connector end, the position of the spring bushing teeth, and the position of the oil drain hole edge, and establishes the unfolding direction based on the oil ring groove structure relationship, converting the circumferential structure inside the oil ring groove into an unfolded arrangement relationship. This can accurately represent the positional relationship of each component within the spring bushing installation area, avoiding the problem of difficulty in confirming the internal structure position caused by relying on manual observation in traditional teaching, and improving the accuracy of oil ring and spring bushing assembly state analysis.

[0007] 2. This invention determines the position of the spring bushing joint end that overlaps with the spring bushing tooth position by acquiring images of the oil ring assembly process and combining them with the spring bushing groove unfolding data. It also unfolds and maps the process position of the free end and arranges them in sequence to form a toothed entry hole migration chain. At the same time, it generates a release sequence by combining the scraper contact area, the free end withdrawal direction and the toothed retraction direction. This can clarify the action relationship in the oil ring spring bushing back-off release process and solve the problem that existing teaching methods cannot accurately determine the release sequence.

[0008] 3. This invention collects students' operating posture and current perspective information, converts the release sequence into a step-by-step process that conforms to the observation direction of the trainees, and converts the operating position, operating direction, and operating sequence into operating guidance information, enabling trainees to complete the oil ring bushing release operation according to the specific position and direction of movement. This reduces the operating deviation caused by experience differences during manual demonstration and improves the standardization and operability of aircraft engine training. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating an operational guidance method for practical training of aircraft engines, provided as an embodiment of the present invention. Detailed Implementation

[0010] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0011] This embodiment provides an operational guidance method for practical training in aircraft engines. (See also...) Figure 1 Specifically, including: S1. Determine the circumferential angle data based on the image of the oil ring groove area of ​​the aircraft engine piston and the piston structure calibration data; based on the circumferential angle data, unfold and arrange the end position of the spring bushing joint, the position of the spring bushing teeth and the position of the oil drain hole to obtain the unfolded data of the spring bushing groove. In an embodiment of the present invention, determining the circumferential angle data includes: Acquire images of the oil ring groove region of the aircraft engine piston and piston structure calibration data; The image of the oil ring groove area of ​​an aircraft engine piston refers to the visual information of the area where the oil ring groove is located on the outer circumferential surface of the aircraft engine piston, which is obtained through image acquisition equipment. It is used to reflect the groove outline, the bushing installation area, and the distribution of the drain hole. The piston structure calibration data refers to the positioning reference information established based on the actual structural dimensions of the aircraft engine piston. It is used to describe the calibration information of the piston axial position, the circumferential position of the oil ring groove, the radius of the oil ring groove, and the spatial correspondence between the various structures. Specifically, the image acquisition device is aimed at the oil ring groove area on the outer circumferential surface of the aircraft engine piston to acquire image information including the groove opening contour, groove bottom structure, bushing installation area, and drain hole opening area. The piston axial reference position and circumferential positioning reference position in the piston structure calibration data are marked on the oil ring groove area image. The circumferential unfolding direction is determined by the piston outer circumference in the oil ring groove area image, and the axial positioning direction is determined by the edge of the oil ring groove. The pixel positions in the image are transformed according to the axial positioning direction and the circumferential unfolding direction so that the structural position in the oil ring groove area image corresponds to the actual structural position of the aircraft engine piston.

[0012] Extract the position of the spring-supporting joint end, the position of the spring-supporting teeth, and the position of the oil drain hole edge from the image of the oil ring groove region; The end position of the spring bushing joint refers to the specific positioning position of the joint end face or edge in the circumferential direction of the oil ring groove in the connection area between the two ends of the oil ring spring bushing. This position is used to indicate the installation state of the spring bushing end connection area in the ring groove. The spring bushing corrugation position refers to the position corresponding to the corrugated support structure formed by the continuous bending of the oil ring spring bushing along the circumferential direction. This position is used to indicate the distribution position of the contact support area between the spring bushing and the oil ring assembly. The oil drain hole edge position refers to the contour position formed by the intersection of the oil drain hole opening edge at the bottom of the oil ring groove and the surface of the oil ring groove. This position is used to indicate the boundary position of the oil drain channel in the circumferential direction of the oil ring groove. Specifically, contour recognition is performed on the bottom region of the oil ring groove in the image, and position search is performed along the continuous edge of the spring support installation area. When the end contour change position formed by the connection of the two ends of the spring support is detected, the position is marked as the end position of the spring support joint. The waveform bending contour in the spring support installation area is continuously located, and the bending support position of the spring support is extracted according to the position change of adjacent protruding and concave areas in the waveform contour. The extracted position is used as the spring support tooth position. The oil drain hole opening area at the bottom of the oil ring groove is segmented, and the position where the edge of the oil drain hole opening connects with the bottom surface of the groove is extracted. The connection position is used as the oil drain hole edge position.

[0013] The starting point for the development of the annular groove is the position of the oil drain hole edge closest to the end of the spring bushing joint. The starting point of the annular groove development refers to the reference starting position selected when converting the oil annular groove structure with a circular shape into a planar development form. It is used to uniformly describe the arrangement relationship of the end position of the spring bushing joint, the position of the spring bushing teeth, and the position of the drain hole along the development direction. Specifically, the extracted positions of the spring bushing connector end and the edges of each drain hole are read. Based on the circumferential positioning reference in the piston structure calibration data, the absolute circumferential angles corresponding to each position on the circumferential cross-section of the oil ring groove are determined. The difference in circumferential angles between the spring bushing connector end and the edges of each drain hole is calculated. After converting the angle difference to radians, it is multiplied by the radius of the oil ring groove obtained from the piston structure calibration data to obtain the circumferential arc distance between them. Based on this, the arc distance relationship between the spring bushing connector end and the edges of each drain hole is obtained. The drain hole edge position with the smallest circumferential arc distance from the spring bushing connector end is selected as the starting reference position for the circumferential expansion of the oil ring groove. The corresponding position of this starting reference position in the oil ring groove area image is recorded to obtain the starting point of the ring groove expansion.

[0014] Obtain the circumferential angle data of the spring bushing joint end position, spring bushing tooth position, and drain hole edge position relative to the starting point of the annular groove.

[0015] Circumferential angle data refers to the angular relationship between the end position of the spring bushing joint, the position of the spring bushing teeth, and the position of the oil drain hole along the circumference of the oil ring groove, with the starting point of the ring groove as the reference position. It is used to represent the relative distribution relationship of each structure in the circumferential space.

[0016] Specifically, taking the starting point of the ring groove as the reference position in the circumferential direction, the position of the spring bushing end, the position of the spring bushing teeth, and the position of the drain hole are converted to the corresponding positional relationship in the circumferential direction of the piston. Based on the circumferential angle between each position point and the starting point of the ring groove, the angular position of the spring bushing end, the position of the spring bushing teeth, and the position of the drain hole relative to the starting point of the ring groove are calculated, and the angular position corresponding to each position is taken as the circumferential angle.

[0017] In an embodiment of the present invention, the data for obtaining the unfolded groove of the spring retainer includes: The oil ring groove radius is obtained based on the piston structure calibration data; Specifically, the piston center axis positioning information, piston outer circle contour positioning information, and oil ring groove axial positioning information in the piston structure calibration data are spatially correlated. The piston rotation center position is determined based on the piston center axis positioning information, and the cross-sectional position of the oil ring groove is determined based on the oil ring groove axial positioning information. The bottom contour of the oil ring groove in the oil ring groove area image is projected onto the cross-section of the oil ring groove. The positions farthest and closest to the piston center axis in the radial direction of the bottom contour of the oil ring groove are extracted. The radial distance from the piston center axis to the bottom contour of the oil ring groove is calculated, and this radial distance is used as the radius of the oil ring groove.

[0018] The specific steps for calculating the radius of the oil ring groove are as follows: Spatially correlate the piston center axis positioning information, piston outer circle contour positioning information, and oil ring groove axial positioning information from the piston structure calibration data. Determine the piston's rotation center axis based on the piston center axis positioning information, and determine the circumferential cross-sectional position of the oil ring groove based on the oil ring groove axial positioning information. Project the oil ring groove bottom contour from the oil ring groove region image onto this circumferential cross-section. Using the intersection of the rotation center axis and this circumferential cross-section as the reference center, extract the feature point furthest from the reference center and the closest feature point radially along the groove bottom contour. Calculate the straight-line distance from each feature point to the reference center to obtain the maximum and minimum radial distances of the groove bottom contour. Take the arithmetic mean of these two distances, and use the calculated average radial distance as the oil ring groove radius.

[0019] Based on the starting point of the annular groove development and the piston structure calibration data, the development direction of the oil annular groove is determined; The oil ring groove radius refers to the distance from the central axis of the piston of an aircraft engine to the circumferential surface of the oil ring groove, which is used to represent the radial dimension of the oil ring groove in the direction of the outer circumference of the piston; the oil ring groove unfolding direction refers to the directional path used when converting the annular oil ring groove structure into a planar arrangement along the circumference, which is used to represent the arrangement direction of the end position of the spring bushing joint, the position of the spring bushing teeth, and the position of the drain hole during the unfolding process. Specifically, the piston center axis position, piston circumferential positioning direction, and oil ring groove axial position in the piston structure calibration data are spatially located. The position of the drain hole corresponding to the starting point of the ring groove unfolding is mapped to the piston circumferential positioning direction. A circumferential reference path is established with the starting point of the ring groove unfolding as the starting position. The continuous extension direction of the groove bottom contour in the oil ring groove area image is obtained along this reference path. The continuous extension direction of the groove bottom contour is matched with the piston circumferential positioning direction. The circumferential extension direction that is consistent with the piston circumferential positioning direction is taken as the oil ring groove unfolding direction.

[0020] Based on the circumferential angle data and the radius of the oil ring groove, calculate the unfolded positions of the spring liner end position, the spring liner tooth position, and the oil drain hole edge position in the unfolding direction of the oil ring groove. Specifically, the angular relationship corresponding to the circumferential angle data is converted into an arc length relationship in the circumferential direction. The oil ring groove radius is multiplied with the circumferential angle data to calculate the circumferential unfolding distance of the spring bushing end position, the spring bushing tooth position, and the oil drain hole edge position relative to the starting point of the ring groove unfolding. The circumferential unfolding distance is used as the unfolding position of the corresponding position along the unfolding direction of the oil ring groove.

[0021] It should be noted that the arc length relationship in the circumferential direction remains unchanged during the unfolding process of the cylindrical oil ring groove. Therefore, the product of the circumferential angle data and the radius of the oil ring groove can represent the actual arc length distance along the circumferential direction of the corresponding position. The positions of the spring support joint end, the spring support tooth, and the oil drain hole edge are all located within the same circumferential surface of the oil ring groove. The circumferential angle data relative to the starting point of the groove unfolding represents the rotation range of each position in the circumferential direction. The radius of the oil ring groove represents the corresponding arc radius during circumferential unfolding. The distance obtained by multiplying the two is the linear distance of each position after unfolding along the circumferential direction. Therefore, it can be used as the unfolding position in the unfolding direction of the oil ring groove, transforming the original positions of the spring support joint end, the spring support tooth, and the oil drain hole edge, which were located on the curved surface, into positional relationships in a planar unfolded state.

[0022] According to the unfolding position, the positions of the spring liner joint end, the spring liner corrugation, and the oil drain hole edge are unfolded and arranged to obtain the spring liner ring groove unfolding data.

[0023] The oil ring groove unfolding position refers to the spatial positioning position of the spring liner end position, the spring liner corrugation position, and the oil drain hole position after being converted to the planar unfolding direction. It is used to represent the positional relationship of each structure in the unfolded state. The spring liner groove unfolding data refers to the structural position information formed by arranging the spring liner end position, the spring liner corrugation position, and the oil drain hole position in the oil ring groove according to the unfolding direction of the oil ring groove. It is used to describe the distribution relationship of each structure inside the oil ring groove in the unfolded state.

[0024] Specifically, the unfolded positions corresponding to the end of the spring bushing connector, the spring bushing teeth, and the oil drain hole edge are mapped to the plane positions along the unfolding direction of the oil ring groove. The unfolded positions are arranged according to their order in the unfolding direction of the oil ring groove. The distance relationship between the end of the spring bushing connector and the adjacent spring bushing teeth, as well as the distance relationship between the end of the spring bushing connector and the oil drain hole edge, are retained in the unfolded planar structure to form the spring bushing groove unfolding data corresponding to the circumferential structure of the oil ring groove.

[0025] S2. Based on the unfolded data of the spring ring groove, obtain the position of the free end on the inner side of the stack; unfold and map the free end process positions corresponding to the positions on the inner side of the stack and arrange them in order to obtain the tooth entry hole migration chain. In an embodiment of the present invention, obtaining the position of the free end on the inner side of the stack includes: Acquire images of the oil ring assembly process of an aircraft engine piston; The images of the oil ring assembly process of an aircraft engine piston refer to the image information collected during the installation of the oil ring on the aircraft engine piston at each stage. These images are used to record the structural changes during the process of the bushing entering the oil ring groove, the installation of the scraper, and the tightening of the oil ring assembly. Specifically, the image acquisition device is set up in the external space of the piston oil ring groove to continuously acquire images of the spring bushing installation area during the piston oil ring assembly process. The acquisition range covers the end of the spring bushing joint, the distribution area of ​​the spring bushing teeth, the side wall of the oil ring groove, and the bottom area of ​​the oil ring groove. The acquired continuous images are arranged according to the order of assembly actions. The position of the piston center, the outline of the oil ring groove, and the spring bushing installation area in each image are corrected. The corrected images are spatially correlated with the position of the spring bushing joint end, the position of the spring bushing teeth, and the position of the drain hole edge in the spring bushing groove unfolding data. The positional change process of the spring bushing joint end relative to the spring bushing teeth and the oil ring groove in different assembly stages is determined to form an image of the oil ring assembly process.

[0026] Based on the spring ring groove unfolding data, the end position of the spring liner joint that overlaps with the position of the spring liner teeth is extracted from the oil ring assembly process image; The spring-supporting ring groove unfolding data refers to the positional arrangement information formed after converting the positions of the spring-supporting joint end, the spring-supporting wave tooth, and the oil drain hole along the unfolding direction inside the oil ring groove. It is used to represent the spatial relationship of each structure in the oil ring groove in the unfolded state. The spring-supporting joint end position that overlaps with the spring-supporting wave tooth position refers to the end position corresponding to the area where the spring-supporting joint end and the wave support tooth position coincide in the circumferential direction during the spring-supporting installation process. It is used to represent the positional relationship where the two ends of the spring-supporting ring overlap. Specifically, the position of the spring-supporting ring groove unfolding data is converted to the image area corresponding to the oil ring assembly process image. Within this image area, the edge contour of the spring-supporting joint end is searched along the circumferential direction of the spring-supporting ring groove. The position of the end connection area, the wave support area, and the adjacent gap area in the spring-supporting joint end contour are distinguished. The positional relationship of the spring-supporting joint end and the spring-supporting ring groove groove that are spatially overlapping is extracted. The position of the spring-supporting joint end located in the area corresponding to the spring-supporting ring groove groove is taken as the position of the spring-supporting joint end that overlaps with the position of the spring-supporting ring groove groove groove.

[0027] The position of the free end on the inner side of the overlap is obtained based on the position of the end of the spring connector that overlaps with the position of the spring wave teeth.

[0028] The position of the free end on the inner side of the overlap refers to the position of the end that is not fixedly connected on the inner side when the spring bushing is overlapped. This position indicates the end position of the spring bushing that can move and change in the overlapped state.

[0029] Specifically, the end position of the spring connector that overlaps with the spring wave tooth position is divided into end regions along the circumferential unfolding direction of the spring connector. The corresponding end contour regions on both sides of the spring connector end are extracted. The side of the end contour region facing the inside of the oil ring groove and located in the spring stacking area is taken as the inner end region. The position of the spring end contour in the inner end region is marked to obtain the position of the inner free end of the stacking.

[0030] The inner side specifically refers to the side along the circumferential direction of the oil ring groove, located within the spring stacking area and facing the overlapping center of the two joints, not the side along the radial direction of the piston facing the piston center. The side in the end profile area that satisfies the inner side definition is taken as the inner end area. The position of the spring end profile in the inner end area is marked to obtain the position of the free end of the stacked inner side.

[0031] In an embodiment of the present invention, a toothed in-hole migration chain is obtained, comprising: According to the acquisition sequence of the oil ring assembly process images, extract the free end process position corresponding to the free end position on the inner side of the stack; The free end process position refers to the positional change information of the free end on the inner side of the spring stack at different time stages during the oil ring assembly process, which is used to represent the spatial position of the free end as it moves from the initial stacking area toward the drain hole. Specifically, the continuously acquired images of the oil ring assembly process are sorted chronologically according to the assembly process of inserting the spring bushing into the oil ring groove, overlapping the spring bushing joint, and tightening the oil ring assembly. The position of the oil ring groove area in each assembly stage is corrected to keep the circumferential position of the oil ring groove in different stages corresponding. The position of the free end on the inner side of the overlap is mapped to the oil ring groove area corresponding to each assembly stage. The position of the free end edge change is extracted along the contour direction of the spring bushing joint end. The spatial change of the free end in different assembly stages is recorded. The free end positions extracted in each stage are connected according to the assembly process sequence to form the free end process position representing the free end movement process.

[0032] The continuously acquired images of the oil ring assembly process are sorted chronologically according to the assembly process of inserting the spring into the oil ring groove, overlapping the spring joint, and tightening the oil ring assembly. The position of the oil ring groove area in each assembly stage is corrected to ensure that the circumferential position of the oil ring groove in different stages remains corresponding. The position of the free end on the inner side of the overlap is mapped to the oil ring groove area corresponding to each assembly stage. A free end detection sub-region is defined within the mapping range of each frame image. The sub-region is preprocessed with grayscale conversion and Gaussian filtering to suppress acquisition noise and interference from surface reflection of the parts. The edge pixels of the spring end in the sub-region are extracted using the Canny edge detection algorithm. The edge pixels are fitted by the least squares method to obtain the contour line of the spring joint end. The endpoint coordinates of the contour line are located along the extension direction of the spring joint end contour. The displacement change of the endpoint is tracked frame by frame according to the acquisition time sequence to extract the position of the free end edge change. The spatial change of the free end in different assembly stages is recorded. The free end positions extracted in each stage are connected according to the assembly process sequence to form the free end process position representing the free end movement process.

[0033] The process positions of the free ends are expanded, mapped, and arranged sequentially to obtain the sequence of free end insertion holes; The sequence of free ends entering the hole refers to the order in which the free ends enter the drain hole area based on the change in the position of the free ends in the oil ring assembly process image. It is used to represent the positional evolution process when the free ends undergo displacement changes. Specifically, the circumferential position of the oil ring groove corresponding to the process position of the free end is converted to the oil ring groove unfolding direction in the spring sleeve groove unfolding data. Based on the circumferential position relationship between the process position of the free end and the position along the oil drain hole, the process position of the free end is projected onto the position area corresponding to the unfolding direction to obtain the movement path of the free end along the unfolding direction of the oil ring groove. The process positions of the free end corresponding to different assembly stages are arranged according to the movement path of the free end. The positional change relationship of the free end during the movement from the free end position on the inner side of the stack to the position along the oil drain hole is connected to form the movement sequence of the free end entering the oil drain hole area, thus obtaining the free end entry sequence.

[0034] Based on the sequence of free end entry holes, the positions of the free ends on the inner side of the stack, the process positions of the free ends, and the positions of the drain holes are sequentially connected to obtain the stacked tooth entry hole migration chain.

[0035] The stacked tooth entry hole migration chain refers to the continuous positional relationship formed by connecting the position of the free end on the inner side of the stack, the process position of the free end, and the position along the oil drain hole according to the movement process of the free end. It is used to describe the spatial change path of the spring bushing joint when it migrates from the stacked state to the oil drain hole area.

[0036] Specifically, the position of the free end on the inner side of the stack is taken as the initial position of the spring-supported joint in the stacked state. The process positions of each free end in the sequence of entering the hole are connected according to the order of movement. The position of the drain hole edge is taken as the termination position after the free end enters the drain hole area. The positional relationship between the initial position, each process position of the free end and the termination position is continuously associated to form a migration path from the stacked area of ​​the spring-supported joint through the free end movement process to the position of the drain hole edge, thus obtaining the stacked tooth entry hole migration chain.

[0037] S3. Based on the overlapping tooth entry hole migration chain, extract the position of the visible scraper segment and the position of the driven wave tooth, and expand and map the position of the visible scraper segment and the position of the driven wave tooth to obtain the scraper removal part. In an embodiment of the present invention, the scraper removal portion includes: Based on the toothed entry hole migration chain, determine the scraper contact area adjacent to the position of the drain hole; The scraper contact area refers to the local area where the scraper and the spring tooth contact and transmit the action during the oil ring assembly process. This area is located inside the oil ring assembly and corresponds to the range of influence of the spring tooth movement. Specifically, the position of the drain hole edge in the toothed entry hole migration chain is used as a spatial positioning reference position. The movement path corresponding to the process position of the free end in the toothed entry hole migration chain is mapped to the oil ring groove unfolding direction. The affected oil ring component area is determined based on the movement area before the free end enters the drain hole edge position. The scraper structure contour corresponding to the movement area is located in the oil ring assembly process image. The position range where the scraper contacts the spring wave tooth is extracted and this position range is used as the scraper contact area, so that the scraper contact area corresponds to the movement path of the free end in the toothed entry hole migration chain.

[0038] The students' oil ring flicking operation was collected through somatosensory interaction to obtain the students' operating posture data; among which, the students' operating posture data includes the students' hand posture data, flicker posture data, piston posture data and flicking direction. Student operation posture data refers to the spatial posture information of the trainee's hand, tools, and piston relative to the oil ring installation position when performing oil ring actuation; student hand posture data refers to the position, direction, and movement state of the trainee's hand during operation; paddle posture data refers to the spatial position and posture changes of the paddle used to actuate the oil ring assembly during operation; piston posture data refers to the placement direction, rotation state, and spatial positioning information of the aircraft engine piston during oil ring assembly; actuation direction refers to the direction of movement generated when the paddle acts on the oil ring assembly, used to indicate the directional relationship of relative movement between the scraper and the spring teeth; Specifically, the motion sensing data acquisition device is placed at the position where the trainee operates the oil ring to continuously collect data on the trainee's hand movement, the contact of the paddle with the oil ring, and the rotation of the piston. The positional changes of the hand in space are extracted, the positional changes of the paddle relative to the contact area of ​​the scraper are obtained, the placement direction and rotation state of the piston during operation are recorded, and the student's operating posture data is formed by combining the movement direction of the paddle on the oil ring assembly. The student's operating posture data includes the student's hand posture data, paddle posture data, piston posture data, and paddle direction.

[0039] Based on student operation posture data, the positions of visible scraping segments and driven wave teeth corresponding to the scraper contact area are extracted; The scraper segment position refers to the position of the scraper structure area that can be directly observed in the oil ring assembly image; the driven wave tooth position refers to the position where the scraper drives the spring wave tooth to move after being propelled by the scraper. Specifically, the student's operating posture data, including the paddle posture data, student's hand posture data, and piston posture data, are spatially mapped. The paddle end position in the paddle posture data is converted to the position area corresponding to the oil ring assembly process image. The positional change of the contact area between the paddle and the scraper is determined based on the movement trajectory of the paddle end during continuous operation. The scraper contour area intersecting with the paddle movement trajectory within the scraper contact area is extracted as the visible scraper segment position. The spring mounting area corresponding to the visible scraper segment position is associated along the circumference of the oil ring. The force transmission direction of the spring is determined based on the paddle direction in the student's operating posture data. The spring waveform area that undergoes synchronous displacement change with the scraper segment position is extracted along this direction, and the corresponding spring wave tooth position is taken as the driven wave tooth position.

[0040] Based on the oil ring groove expansion direction, the visible scraper segment position and the driven wave tooth position are expanded and mapped to obtain the scraper wave tooth expansion position; Specifically, the spatial positions of the visible scraper fragments and the driven wave teeth in the oil ring assembly process image are transformed to the unfolding plane corresponding to the unfolding direction of the oil ring groove. The circumferential position of the scraper blade corresponding to the visible scraper fragment position is mapped to the straight line position of the unfolding plane, and the circumferential position of the bushing corresponding to the driven wave tooth position is mapped to the straight line position of the unfolding plane. This transforms the curved distribution of the scraper fragment position and the wave tooth position from the circumferential surface of the oil ring groove into an arrangement position in the unfolding direction. The distance relationship between the scraper fragment position and the driven wave tooth position along the circumferential direction of the oil ring groove is preserved. The mapped scraper fragment position and the driven wave tooth position are then associated and arranged to obtain the unfolding position of the scraper blade wave teeth.

[0041] The contact position of the scraper area corresponding to the unfolding position of the scraper wave teeth is marked to obtain the scraper removal position.

[0042] The expansion position of the scraper teeth refers to the planar arrangement of the visible scraper segments and the driven teeth after conversion according to the expansion direction of the oil ring groove; the scraper removal area refers to the specific area where scraper removal operation needs to be carried out, determined according to the expansion position of the scraper teeth.

[0043] Specifically, the visible scraper segment position and the driven wave tooth position in the unfolded position of the scraper wave tooth are matched, the outline of the scraper area connected to the driven wave tooth position around the visible scraper segment position is extracted, the scraper area outline is transformed to the plane position corresponding to the unfolding direction of the oil ring groove, the scraper contact position is marked according to the contact area boundary between the scraper and the wave tooth, and the marked contact area is associated with the actual scraper position in the oil ring assembly process image to form the scraper removal part used to perform the scraper removal action.

[0044] S4. Mark the retraction direction of the free end position on the inner side of the stack to obtain the retraction direction of the stacked teeth; based on the scraper removal part and the retraction direction of the stacked teeth, obtain the retraction release sequence of the stacked teeth entry hole; In an embodiment of the present invention, obtaining the tooth retraction direction includes: From the free end process position, extract the position adjacent to the free end located before the position along the drain hole; The adjacent position of the free end before the drain hole edge position refers to the adjacent moving position of the free end as it moves along the process path to the drain hole edge position, located in front of the drain hole edge position. It is used to indicate the end moving position of the free end before entering the drain hole area. Specifically, the free end process positions in the stacked tooth entry hole migration chain are arranged according to the occurrence sequence of the oil ring assembly process. Each free end process position is converted to the plane position corresponding to the unfolding direction of the spring ring groove, so that the movement trajectory of the free end under different assembly stages is in the same unfolding direction. The unfolding position relationship between the free end process position and the oil drain hole edge position is correlated. The free end process position is tracked segment by segment along the movement path of the free end entering the oil drain hole edge position to obtain the position change relationship of the free end approaching the oil drain hole edge position. The position directly adjacent to the oil drain hole edge position on the movement path is extracted from multiple free end process positions, and the free end process position corresponding to the position is taken as the free end adjacent position.

[0045] Based on the adjacent positions of the free ends, the retraction direction of the inner free end of the stack is marked to obtain the retraction direction of the stacked teeth.

[0046] The retraction direction mark refers to the path direction in which the free end on the inner side of the stack moves back to the original stacked area from the direction of entering the drain hole, using the adjacent position of the free end as a reference for movement; the tooth retraction direction refers to the direction of movement of the free end on the inner side of the stack back in the opposite direction to the direction of entering the drain hole during the release of the tooth stacking state of the spring.

[0047] Specifically, the position of the free end inside the stack, the adjacent position of the free end, and the process position of the free end are converted to the same oil ring groove unfolding direction. The adjacent position of the free end is used as the path connection position after the free end leaves the oil drain hole area. The position of the free end inside the stack is used as the target position when the spring support joint returns to the stacked state. The position change path between the adjacent position of the free end and the position of the free end inside the stack is connected. The movement direction in this path is reversed so that the movement direction points from the adjacent position of the free end to the position of the free end inside the stack. The marked direction is associated with the position of the free end inside the stack to form the tooth retraction direction indicating the return of the spring support free end from the oil drain hole area to the stacked area.

[0048] In an embodiment of the present invention, a toothed inlet hole retraction release sequence is obtained, including: Along the direction from the end to the beginning of the free end entry sequence, mark the path from the position of the drain hole to the position of the free end on the inner side of the stack in reverse to obtain the free end exit direction; The direction of free end withdrawal refers to the direction of movement of the free end of the spring backing from the position along the oil drain hole to the position of the free end inside the stack, which is used to indicate the movement path of the free end in the opposite direction of the oil drain hole area when the stacked teeth are released from the hole state. Specifically, the positions of the drain hole edge, free end process, and inner free end in the free end entry sequence are converted to the plane positions corresponding to the unfolding direction of the spring ring groove. According to the positional change relationship when the free end enters the drain hole edge position, the connection path between the drain hole edge position and the inner free end position is extracted. The connection relationships between adjacent free end process positions are continuously combined to form a free end entry path from the inner free end position to the drain hole edge position. The connection directions in the free end entry path are reversed, so that the original movement relationship from the inner free end position to the drain hole edge position is converted into a movement relationship from the drain hole edge position back to the inner free end position. The reversed path direction is used as the free end exit direction.

[0049] Based on the scraper removal location, the free end withdrawal direction, and the tooth retraction direction, the scraper removal action, the free end hole removal action, and the tooth retraction action are generated sequentially. The scraper removal action refers to the operation of applying an operation to the scraper removal part to separate the scraper from the contact area of ​​the spring teeth; the free end removal action refers to the operation of moving the inner free end of the stack along the free end withdrawal direction to disengage the free end from the oil drain hole and restore it to a free movement state; the tooth retraction action refers to the operation of moving the spring joint along the tooth retraction direction to restore the stacked spring end to a non-stacked state. Specifically, the scraper removal area is mapped to the corresponding scraper area in the oil ring assembly process image. The contact area between the scraper and the spring retainer teeth is extracted. The direction in which the paddle moves from the outside of the scraper to the contact area is taken as the scraper separation direction. A paddle movement path is generated along the scraper separation direction to form the scraper removal action. The free end exit direction between the position of the inner free end of the stack and the position of the drain hole is converted into a free end movement path. The starting position in the free end movement path is set as the position of the drain hole, and the ending position is set as the position of the inner free end of the stack, to form a free end detachment action that guides the free end to leave the drain hole area. The position of the inner free end of the stack is associated with the tooth retraction direction. A spring retainer joint return path is generated along the tooth retraction direction. The movement process of the spring retainer joint returning from the tooth stacking state to the corresponding end position is taken as the tooth retraction action.

[0050] Arrange the scraper removal action, the free end hole removal action, and the tooth retraction action in the reverse order of the free end entry hole sequence to obtain the tooth entry hole retraction release sequence.

[0051] The stacked tooth entry hole retraction release sequence refers to a series of operation steps formed by arranging the scraper removal action, the free end hole release action, and the stacked tooth retraction action in the reverse order of the free end entering the drain hole. It is used to represent the operation process of releasing the stacked tooth entry hole state of the liner spring.

[0052] Specifically, the movement stages in the free end insertion sequence are arranged in reverse order. The free end disengagement process corresponding to the position of the drain hole is taken as the starting position of the release process. The free end disengagement action corresponding to the free end withdrawal direction is arranged after the scraper removal action. The tooth retraction action corresponding to the tooth retraction direction is arranged after the free end disengagement action. The scraper removal action, the free end disengagement action, and the tooth retraction action are connected according to the movement relationship of the spring returning from the tooth insertion state to the normal installation state, forming the tooth insertion retraction release sequence.

[0053] S5. Based on the retraction release sequence of the overlapping teeth and the hole, obtain the step sequence from the student's perspective, and provide operational guidance for the trainees on the retraction release operation of the oil ring bushing.

[0054] In an embodiment of the present invention, a student-perspective step sequence is obtained, including: Collect data on the student's current perspective; this data includes the student's observation direction, piston placement direction, piston rotation angle, and the direction of the interactive interface. The student's current perspective data refers to the observation state and operational space relationship of the trainee when performing the oil ring and spring retraction release operation. It is used to indicate the trainee's line of sight when observing the oil ring assembly, the piston placement, and the display direction of the interactive interface. The student's observation direction refers to the direction of the trainee's line of sight when facing the aircraft engine piston oil ring installation area. It is used to describe the spatial direction corresponding to the trainee's current observation angle. The piston placement direction refers to the orientation of the aircraft engine piston in the training operation area. It is used to indicate the spatial orientation of the piston oil ring groove, spring connector, and drain hole relative to the trainee. The piston rotation angle data refers to the angular change information after the aircraft engine piston rotates around its own central axis. It is used to indicate the positional change relationship of the internal structure of the oil ring groove as the piston rotates. The interactive interface direction refers to the display orientation of the operation guidance content in the training interactive interface. It is used to indicate the correspondence between the operation prompts and the trainee's current observation direction. Specifically, the perspective acquisition device is positioned at the location where trainees perform the oil ring spring retraction release operation. It collects the trainees' line of sight when observing the oil ring area of ​​the aircraft engine piston, obtains the spatial direction information corresponding to the trainees' current observation direction, spatially locates the current position of the piston, obtains the piston's placement direction, and records the angular change process of the piston rotating around its own central axis during the operation, obtaining piston rotation angle data. At the same time, it collects the display direction of the operation prompts in the interactive interface. The student's observation direction, piston placement direction, piston rotation angle data, and interactive interface direction are correlated to form the student's current perspective data.

[0055] Based on the student's current perspective data, the perspective mapping of the overlapping tooth entry hole back fastening release sequence is performed to obtain the student's perspective release sequence. Specifically, the scraper removal action, free end removal action, and tooth retraction action in the toothed insertion hole retraction release sequence are broken down into operating positions, movement directions, and movement paths. Using the student's current perspective data as the observation reference, the operating positions in each action are spatially transformed. The position corresponding to the scraper removal part is converted to the scraper operating position under the student's observation direction; the movement path corresponding to the free end withdrawal direction is converted to the free end movement path under the student's observation direction; and the return path corresponding to the toothed retraction direction is converted to the spring-loaded joint return path under the student's observation direction. The converted positions are then adjusted according to the piston placement direction. The operating position is adjusted to ensure that the scraper removal area, the position of the drain hole, and the position of the free end on the inner side of the stack correspond to the actual piston placement in the student's observation direction. The position of the internal structure of the oil ring groove is rotated and transformed according to the piston rotation angle data, so that the transformed operating position and movement path match the current piston rotation state. The display direction of the operation prompts is adjusted according to the direction of the interactive interface. The scraper removal action, the free end hole removal action, and the stack tooth retraction action after the direction transformation are rearranged according to the action connection relationship in the stack tooth entry hole retraction release sequence to obtain a student perspective release sequence that is suitable for the student's current observation state.

[0056] According to the arrangement order of the overlapping tooth entry hole back retraction release sequence, the student perspective release sequence is numbered step by step to obtain the student perspective step sequence.

[0057] The student perspective step sequence refers to the arrangement of operation steps in the student perspective release sequence, numbered according to the execution order, to indicate the execution order when trainees perform the oil ring bushing backlash release operation.

[0058] Specifically, the scraper removal action, corresponding to the scraper operation position, scraper movement direction, and scraper separation path in the student's perspective release sequence is classified as the first type of operation content. The free end detachment action, corresponding to the oil drain hole detachment position, free end withdrawal direction, and free end movement path, is classified as the second type of operation content. The stacked tooth retraction action, corresponding to the stacked inner free end position, stacked tooth retraction direction, and spring connector return path, is classified as the third type of operation content. The three types of operation content are arranged according to the execution order of the scraper removal action, free end detachment action, and stacked tooth retraction action. A corresponding step number is added to each of the arranged operation contents, and the step number is associated with the operation position, operation direction, and movement path, so that each step includes the corresponding operation area, movement direction, and execution path, forming a student's perspective step sequence.

[0059] In an embodiment of the present invention, operational guidance is provided to trainees on the operation of releasing the oil ring bushing, including: Write the operation location in the student's perspective step sequence into the contact area identifier; Specifically, the operation position corresponding to each operation step in the student's perspective step sequence is spatially located, and the operation position is converted to the display position corresponding to the student's current observation direction. Based on the positional correspondence between the operation position and the actual structure of the oil ring component, the oil ring contact area covered by the operation position is extracted, and the contact area is associated with the corresponding operation step. The contact area is written into the student's perspective step sequence, so that the trainees can determine the oil ring structure area that needs to be contacted in the current step based on the position of the mark.

[0060] Write the operation direction in the student's perspective step sequence into the arrow direction label; Specifically, the movement directions corresponding to the scraper removal action, the free end removal action, and the tooth retraction action in the student's perspective sequence are extracted. The movement paths corresponding to each action are converted to the spatial direction under the student's current observation direction. The start and end positions of the movement paths are connected to generate arrow direction indicators representing the movement direction of the paddle, the free end withdrawal direction, and the retraction direction of the spring connector. The arrow direction indicators are then associated with the corresponding operation positions to ensure that the operation direction corresponds to the contact area indicator.

[0061] Write the order of operations in the student's perspective step sequence into the step sequence identifier; Specifically, the execution sequence of each operation step is obtained according to the arrangement of the scraper removal action, the free end hole removal action, and the tooth retraction action in the student perspective step sequence. Sequence numbers are added to each operation step, and the sequence numbers are associated with the corresponding contact area labels and arrow direction labels, so that each operation step includes the corresponding operation position, movement direction, and execution order, forming a student perspective step sequence containing a complete operation process relationship.

[0062] Contact area markings refer to the information marking the positions where oil ring tossing or scraping operations are required in the student's perspective step sequence, used to indicate the contact range corresponding to the current operation performed by the trainee; arrow direction markings refer to the information graphically representing the movement direction of each operation during the oil ring and spring back-off release process, used to indicate the directional relationship when the toss moves, the free end retracts, and the spring retracts; step sequence markings refer to the step numbering information generated according to the order of actions performed during the oil ring and spring back-off release process, used to indicate the execution order of each operation; The student-perspective step sequence, after being written with contact area identifiers, arrow direction identifiers, and step sequence identifiers, is assembled with guidance information to obtain operation guidance information; The assembly of guidance information refers to the process of associating and arranging contact area markers, arrow direction markers, and step sequence markers with the student's perspective step sequence to form a displayable operation content; operation guidance information refers to guidance information containing operation position, movement direction, and execution order, used to demonstrate the oil ring bushing return release operation process to trainees. Specifically, each operation step in the student-perspective step sequence is divided according to the execution relationship of the scraper removal action, the free end hole removal action, and the tooth retraction action. The contact area identifier corresponding to each operation step is associated with the actual operation area in the oil ring assembly. The arrow direction identifier is associated with the movement path in the corresponding operation area. The step sequence identifier is associated with the execution order of each operation action. The operation position corresponding to the contact area identifier, the movement direction corresponding to the arrow direction identifier, and the execution order corresponding to the step sequence identifier are written into the same operation step. This ensures that each operation step includes the position to be contacted, the direction to be moved, and the order of execution. The multiple operation steps after association are combined according to the arrangement order of the student-perspective step sequence to form operation guidance information.

[0063] Define the oil ring bushing return release operation; Specifically, the release process corresponding to the retraction state of the spring bushing teeth entering the hole is divided into actions. The scraper separation process corresponding to the scraper removal part is defined as the scraper removal operation. The movement process of the spring bushing free end separating from the oil drain hole along the free end withdrawal direction is defined as the free end removal operation. The movement process of the spring bushing joint returning from the stacked state to the original installation position corresponding to the retraction direction of the stacked teeth is defined as the stacked teeth retraction operation. The scraper removal operation, the free end removal operation, and the stacked teeth retraction operation are connected according to the reverse movement process of the stacked teeth entering the hole migration chain to form a complete release process corresponding to the oil ring spring bushing retraction release operation.

[0064] It should be noted that the "overlapping tooth insertion hole retraction state" refers to an abnormal assembly state formed when, during the installation of the oil ring spring, the ends of the spring joint overlap in the circumferential direction, and one of the free ends enters the oil drain hole area of ​​the oil ring groove and is restricted by the hole edge; the free end of the spring refers to the end of the spring joint that is not fixed and covered by the other end after the spring joint is overlapped, and this end can move and change position along the circumferential direction of the oil ring groove; the tooth retraction direction refers to the direction of movement of the free end from the position along the drain hole to the original overlapped area when the spring is released from the overlapping tooth insertion hole retraction state; the spring joint refers to the end structure corresponding to the connection position of the two ends of the oil ring spring, which is used to indicate the positional relationship of the spring circumferential structure being disconnected and connected; the overlapped state refers to the contact state formed when the two ends of the spring joint overlap in the circumferential direction during the installation process, so that one end covers or presses against the other end.

[0065] Based on the operation guidance information, provide operation guidance to trainees on the operation of releasing the oil ring bushing.

[0066] The oil ring spring retraction release operation refers to the process of separating the scraper, disengaging the free end, and retracting the spring joint after the spring teeth have entered the drain hole.

[0067] Specifically, the contact area markers in the operation guidance information are loaded into the oil ring assembly display area corresponding to the trainee's current observation direction, enabling the trainee to determine the scraper removal location, the free end movement area, and the spring retainer retraction area. The arrow direction markers are loaded into the movement path positions of the corresponding contact areas, enabling the trainee to perform the toggle operation along the free end withdrawal direction and the tooth retraction direction. The step sequence markers are loaded into the execution nodes corresponding to each operation position, enabling the trainee to complete the oil ring spring retainer retraction release operation in the order of scraper removal operation, free end hole removal operation, and tooth retraction operation.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An operational guidance method for practical training in aircraft engines, characterized in that, Includes the following steps: S1. Determine the circumferential angle data based on the image of the oil ring groove area of ​​the aircraft engine piston and the piston structure calibration data; based on the circumferential angle data, unfold and arrange the end position of the spring bushing joint, the position of the spring bushing teeth and the position of the oil drain hole to obtain the unfolded data of the spring bushing groove. S2. Based on the unfolded data of the spring ring groove, obtain the position of the free end on the inner side of the stack; unfold and map the free end process positions corresponding to the positions on the inner side of the stack and arrange them in order to obtain the tooth entry hole migration chain. S3. Based on the overlapping tooth entry hole migration chain, extract the position of the visible scraper segment and the position of the driven wave tooth, and expand and map the position of the visible scraper segment and the position of the driven wave tooth to obtain the scraper removal part. S4. Mark the retraction direction of the free end position on the inner side of the stack to obtain the retraction direction of the stacked teeth; based on the scraper removal part and the retraction direction of the stacked teeth, obtain the retraction release sequence of the stacked teeth entry hole; S5. Based on the retraction release sequence of the overlapping teeth and the hole, obtain the step sequence from the student's perspective, and provide operational guidance for the trainees on the retraction release operation of the oil ring bushing.

2. The operation guidance method for practical training of aircraft engines according to claim 1, characterized in that, Determine the inscribed angle data, including: Acquire images of the oil ring groove region of the aircraft engine piston and piston structure calibration data; Extract the position of the spring-supporting joint end, the position of the spring-supporting teeth, and the position of the oil drain hole edge from the image of the oil ring groove region; The starting point for the development of the annular groove is the position of the oil drain hole edge closest to the end of the spring bushing joint. Obtain the circumferential angle data of the spring bushing joint end position, spring bushing tooth position, and drain hole edge position relative to the starting point of the annular groove.

3. The operation guidance method for practical training of aircraft engines according to claim 2, characterized in that, The unfolded data of the spring ring groove was obtained, including: The oil ring groove radius is obtained based on the piston structure calibration data; Based on the starting point of the annular groove development and the piston structure calibration data, the development direction of the oil annular groove is determined; Based on the circumferential angle data and the radius of the oil ring groove, calculate the unfolded positions of the spring liner end position, the spring liner tooth position, and the oil drain hole edge position in the unfolding direction of the oil ring groove. According to the unfolding position, the positions of the spring liner joint end, the spring liner corrugation, and the oil drain hole edge are unfolded and arranged to obtain the spring liner ring groove unfolding data.

4. The operation guidance method for practical training of aircraft engines according to claim 1, characterized in that, Obtain the position of the free end on the inner side of the stack, including: Acquire images of the oil ring assembly process of an aircraft engine piston; Based on the spring ring groove unfolding data, the end position of the spring liner joint that overlaps with the position of the spring liner teeth is extracted from the oil ring assembly process image; The position of the free end on the inner side of the overlap is obtained based on the position of the end of the spring connector that overlaps with the position of the spring wave teeth.

5. The operation guidance method for practical training of aircraft engines according to claim 4, characterized in that, The resulting toothed in-hole migration chain includes: According to the acquisition sequence of the oil ring assembly process images, extract the free end process position corresponding to the free end position on the inner side of the stack; The process positions of the free ends are expanded, mapped, and arranged sequentially to obtain the sequence of free end insertion holes; Based on the sequence of free end entry holes, the positions of the free ends on the inner side of the stack, the process positions of the free ends, and the positions of the drain holes are sequentially connected to obtain the stacked tooth entry hole migration chain.

6. The operation guidance method for practical training of aircraft engines according to claim 3, characterized in that, The scraper removal area is obtained, including: Based on the toothed entry hole migration chain, determine the scraper contact area adjacent to the position of the drain hole; The students' oil ring flicking operation was collected through somatosensory interaction to obtain the students' operating posture data; among which, the students' operating posture data includes the students' hand posture data, flicker posture data, piston posture data and flicking direction. Based on student operation posture data, the positions of visible scraping segments and driven wave teeth corresponding to the scraper contact area are extracted; Based on the oil ring groove expansion direction, the visible scraper segment position and the driven wave tooth position are expanded and mapped to obtain the scraper wave tooth expansion position; The contact position of the scraper area corresponding to the unfolding position of the scraper wave teeth is marked to obtain the scraper removal position.

7. The operational guidance method for practical training of aircraft engines according to claim 5, characterized in that, To obtain the retraction direction of the stacked teeth, including: From the free end process position, extract the position adjacent to the free end located before the position along the drain hole; Based on the adjacent positions of the free ends, the retraction direction of the inner free end of the stack is marked to obtain the retraction direction of the stacked teeth.

8. The operation guidance method for practical training of aircraft engines according to claim 7, characterized in that, The sequence for releasing the toothed inlet return is obtained, including: Along the direction from the end to the beginning of the free end entry sequence, mark the path from the position of the drain hole to the position of the free end on the inner side of the stack in reverse to obtain the free end exit direction; Based on the scraper removal location, the free end withdrawal direction, and the tooth retraction direction, the scraper removal action, the free end hole removal action, and the tooth retraction action are generated sequentially. Arrange the scraper removal action, the free end hole removal action, and the tooth retraction action in the reverse order of the free end entry hole sequence to obtain the tooth entry hole retraction release sequence.

9. The operation guidance method for practical training of aircraft engines according to claim 1, characterized in that, The sequence of steps from the student's perspective includes: Collect data on the student's current perspective; this data includes the student's observation direction, piston placement direction, piston rotation angle, and the direction of the interactive interface. Based on the student's current perspective data, the perspective mapping of the overlapping tooth entry hole back fastening release sequence is performed to obtain the student's perspective release sequence. According to the arrangement order of the overlapping tooth entry hole back retraction release sequence, the student perspective release sequence is numbered step by step to obtain the student perspective step sequence.

10. The operation guidance method for practical training of aircraft engines according to claim 1, characterized in that, Provide operational guidance to trainees on the release operation of the oil ring bushing, including: Write the operation location in the student's perspective step sequence into the contact area identifier; Write the operation direction in the student's perspective step sequence into the arrow direction label; Write the order of operations in the student's perspective step sequence into the step sequence identifier; The student-perspective step sequence, after being written with contact area identifiers, arrow direction identifiers, and step sequence identifiers, is assembled with guidance information to obtain operation guidance information; Define the oil ring bushing return release operation; Based on the operation guidance information, provide operation guidance to trainees on the operation of releasing the oil ring bushing.

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