Bidirectional extrusion detection device and detection method for aircraft seal

Abstract

The application relates to the technical field of sealing ring detection, in particular to a bidirectional extrusion detection device and detection method for an aircraft sealing ring, which comprises a support, a fixed plate and a lifting plate fixed on the support, a rotating rod and a rotating disc fixed on the rotating rod, a plurality of through holes are formed on the rotating disc in a circumferential equidistant distribution, a support pushing mechanism is arranged on the support, an inner support rotating mechanism is arranged on the support pushing mechanism, symmetrical positioning arc-shaped plates are connected to the inner support rotating mechanism, the height and the interval of the two positioning arc-shaped plates can be adjusted through the inner support rotating mechanism, a bidirectional extrusion mechanism is arranged on the lifting plate, through cooperation of the positioning arc-shaped plates and the bidirectional extrusion mechanism, the deformation actions of the inner side and the outer side of the sealing ring can be controlled in sequence, cracks and flaws possibly existing on the inner side and the outer side of the sealing ring are exposed, and the sealing ring can be comprehensively detected.

Description

Technical Field

[0001] This invention relates to the field of sealing ring testing technology, specifically to a bidirectional compression testing device and method for aircraft sealing rings. Background Technology

[0002] Aircraft seals are key components that ensure the sealing safety of aircraft hydraulic, fuel, and environmental control systems. They operate under harsh conditions such as alternating high and low temperatures, high pressure, and vibration for extended periods.

[0003] Any material defects (such as cracks, bubbles, impurities) or manufacturing defects (such as unevenness, out-of-tolerance dimensions) can lead to seal failure and cause serious flight safety hazards. Therefore, it is crucial to conduct rigorous and comprehensive non-destructive testing on the seals during the production stage.

[0004] Traditional methods for inspecting sealing rings mainly include manual visual inspection, dimensional measurement, and some functional airtightness / watertightness tests. With technological advancements, non-contact methods such as automated visual inspection and laser scanning are gradually being applied.

[0005] For automated visual inspection to be accurate, the sealing ring needs to be controlled to be in a corresponding state, such as being squeezed or stretched. However, most equipment only simulates a single stress state of the sealing ring for inspection, and cannot fully simulate the complex and compound deformation it undergoes in actual assembly and use. This leads to the omission of some defects that only appear under specific deformation modes. Furthermore, when performing squeeze or stretch inspection, the sealing ring is prone to slippage, deflection, or axial warping, which not only affects the uniformity and repeatability of deformation, but also interferes with the imaging and analysis of the vision system, reducing the accuracy of inspection. Summary of the Invention

[0006] The purpose of this invention is to provide a bidirectional compression testing device and method for aircraft seals, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A bidirectional compression testing device for aircraft seals includes:

[0009] The bracket, and the fixing plate and lifting plate fixed on the bracket;

[0010] A rotating rod and a turntable fixed on the rotating rod, the turntable having multiple through holes evenly distributed around the circumference;

[0011] Also includes:

[0012] A supporting jacking mechanism is provided on the bracket. The supporting jacking mechanism is provided with an inner support rotation mechanism. The inner support rotation mechanism is connected to symmetrically arranged positioning arc plates. The supporting jacking mechanism can adjust the height and spacing of the two positioning arc plates through the inner support rotation mechanism and control the rotation of the positioning arc plates.

[0013] A bidirectional extrusion mechanism is installed on the lifting plate and is used to perform extrusion detection on both sides of the sealing ring placed on the turntable.

[0014] As a further aspect of the present invention: the supporting and pushing mechanism includes a support plate fixed on the bracket, and cylinders arranged symmetrically on the support plate, with a movable plate fixed on the telescopic end of the cylinders;

[0015] It also includes a lifting assembly and an elastic assembly disposed on the support plate and connected to the movable plate.

[0016] As a further embodiment of the present invention: the lifting assembly includes a movable rod fixed on the movable plate, and the movable rod has a hollow rod that can slide through the through hole.

[0017] As a further embodiment of the present invention: the elastic component includes a fixing ring fixed to the end of the hollow rod, and a spring is sleeved on the movable rod, with the two ends of the spring abutting against the fixing ring and the movable plate respectively.

[0018] As a further embodiment of the present invention: the inner support rotation mechanism includes a straight groove and a spiral groove formed on the outer circumference of the hollow rod, a sliding sleeve is slidably attached to the hollow rod, and a limiting block is fixed on the movable rod to slide and engage with the straight groove and the spiral groove, and the limiting block is fixedly connected to the sliding sleeve.

[0019] As a further embodiment of the present invention: the inner support rotation mechanism further includes a first connecting rod and a second connecting rod hinged to the outer wall of the circumference of the hollow rod and arranged in parallel, a rotating ring is rotatably mounted on the sliding sleeve, a hinge rod is hinged on the rotating ring, and the first connecting rod, the second connecting rod, and the hinge rod are respectively hinged to the positioning arc plate.

[0020] As a further embodiment of the present invention: the bidirectional extrusion mechanism includes a motor fixed on the lifting plate, a bidirectional lead screw rotatably mounted on the lifting plate and connected to the output shaft of the motor, and a guide assembly connected to the bidirectional lead screw is provided on the lifting plate.

[0021] As a further embodiment of the present invention: the guide assembly includes a guide rail fixed on the lifting plate, and a threaded sleeve symmetrically arranged is threadedly connected to the bidirectional lead screw. The threaded sleeve is slidably connected to the guide rail, and an extrusion plate is fixed on the threaded sleeve. A limiting groove is formed on the extrusion plate.

[0022] As a further embodiment of the present invention: an upper camera is fixed on the lifting plate, and a lower camera is fixed on the support plate.

[0023] A bidirectional extrusion testing method for aircraft seals includes the following steps:

[0024] Step 1: Place the sealing ring to be tested on the turntable, and use the rotating rod to control the turntable to rotate intermittently, so as to move the sealing ring to the position to be tested;

[0025] Step 2: Under the action of the supporting jacking mechanism, the inner support rotation mechanism is driven to move, so that the positioning arc plate passes through the through hole and is inserted into the sealing ring;

[0026] Step 3: The supporting jacking mechanism will also control the two positioning arc plates to move away from each other through the internal support rotation mechanism, while simultaneously performing a rotation action;

[0027] Step 4: After the positioning arc plate is reset, the sealing ring is squeezed and tested on both sides by the bidirectional extrusion mechanism.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves comprehensive testing of the sealing ring through the cooperation of the internal support rotation mechanism and the bidirectional extrusion mechanism. In the internal support rotation testing stage, the cylinder drives the hollow rod to rise through the pre-compression spring, so that the retracted positioning arc plate passes through the through hole and inserts into the inner hole of the sealing ring. Subsequently, the two positioning arc plates are controlled to perform opposite movements in the horizontal direction, thereby smoothly and evenly expanding the sealing ring radially from the inside, thus performing internal support testing.

[0029] The internal support rotation mechanism can also control the rotation of the sealing ring when the two positioning arc plates open the sealing ring. In this way, the upper and lower cameras can take 360° pictures of the entire circumference surface of the sealing ring in a stable open state, completely eliminating the detection blind spot and greatly improving the detection rate of defects such as inner wall cracks, inclusions and uneven deformation.

[0030] During the bidirectional extrusion testing stage, the two extrusion discs are controlled to move towards each other by the bidirectional extrusion mechanism. Under the action of the limiting groove, the sealing ring is laterally captured and axially constrained. This allows the radial extrusion force transmitted by the bidirectional screw to be fully used to generate uniform and controllable compression deformation in the horizontal plane, thus completely suppressing any possible axial warping or three-dimensional twisting of the sealing ring. In this way, through the cooperation of the inner support positioning mechanism and the bidirectional extrusion mechanism, defects of the sealing ring can be detected in both the inner diameter expansion and outer diameter extrusion states. This allows the sealing ring to be deformed sequentially on both the inner and outer sides, so as to fully expose any cracks or defects that may exist on the inner and outer sides of the sealing ring, thereby ensuring the accuracy of the sealing ring test results. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an embodiment of a bidirectional extrusion detection device for aircraft seals.

[0032] Figure 2 This is a structural schematic diagram from another angle in an embodiment of a bidirectional compression testing device for aircraft seals.

[0033] Figure 3 This is a schematic diagram showing the connection relationship between the support pushing mechanism and the partial inner support rotating mechanism in an embodiment of a bidirectional compression testing device for aircraft seals.

[0034] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0035] Figure 5 This is a schematic diagram of the bidirectional extrusion mechanism in an embodiment of a bidirectional extrusion testing device for aircraft seals.

[0036] Figure 6 for Figure 5 Another structural diagram from a different angle.

[0037] Figure 7 This is a schematic diagram of the supporting push mechanism, part of the internal support rotation mechanism, and the lower camera in an embodiment of a bidirectional compression detection device for aircraft seals.

[0038] Figure 8 for Figure 7 Another structural diagram from a different angle.

[0039] Figure 9 This is an exploded structural diagram of part of the support pushing mechanism and part of the inner support rotating mechanism in an embodiment of a bidirectional compression detection device for aircraft seals.

[0040] In the diagram: 1. Bracket; 2. Fixing plate; 3. Lifting plate; 4. Motor; 5. Guide rail; 6. Two-way lead screw; 7. Threaded sleeve; 8. Extrusion plate; 801. Limiting groove; 9. Upper camera; 10. Rotating rod; 11. Turntable; 1101. Through hole; 12. Support plate; 13. Hollow rod; 1301. Straight groove; 1302. Spiral groove; 14. Fixing ring; 15. First connecting rod; 16. Second connecting rod; 17. Positioning arc plate; 18. Sliding sleeve; 1801. Rotating ring; 19. Hinge rod; 20. Cylinder; 21. Movable plate; 22. Movable rod; 2201. Limiting block; 23. Spring; 24. Lower camera. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0043] Please see Figures 1-9 In this embodiment of the invention, a bidirectional extrusion detection device for aircraft sealing rings includes:

[0044] The bracket 1, and the fixing plate 2 and the lifting plate 3 fixed on the bracket 1;

[0045] Rotating rod 10, and turntable 11 fixed on rotating rod 10, with multiple through holes 1101 distributed circumferentially on turntable 11;

[0046] Also includes:

[0047] A support and pushing mechanism is provided on the bracket 1. The support and pushing mechanism is provided with an inner support rotation mechanism. The inner support rotation mechanism is connected to symmetrically arranged positioning arc plates 17. The support and pushing mechanism can adjust the height and spacing of the two positioning arc plates 17 through the inner support rotation mechanism and control the rotation of the positioning arc plates 17.

[0048] A bidirectional extrusion mechanism is provided on the lifting plate 3 for extruding and detecting the two sides of the sealing ring placed on the turntable 11.

[0049] Specifically, to ensure the sealing effect of the sealing ring, it needs to be inspected during production to ensure safety when used in aircraft. Sealing ring inspection typically involves controlling the deformation of the sealing ring through compression and expansion to expose potential defects. Therefore, when the sealing ring is placed on the turntable 11, since it is fed intermittently at equal intervals, it will be positioned to mate with the through hole 1101. When the sealing ring moves to the inspection area, under the action of the support pushing mechanism, the positioning arc plate 17 is controlled by the inner support rotation mechanism to first pass through the through hole 1101 and insert into the sealing ring. Simultaneously, the support pushing mechanism also adjusts the distance between the two positioning arc plates 17 through the inner support rotation mechanism and controls... Two positioning arc plates 17 rotate, thereby opening the sealing ring from the inside and controlling the rotation of the sealing ring to ensure that the sealing ring is fully inspected in this state. The positioning arc plates 17 also have a positioning effect, ensuring that the sealing ring is always in the precise inspection position. After the internal support inspection is completed, the support pushing mechanism and the internal support rotation mechanism control the two positioning arc plates 17 to reset. At the same time, under the action of the bidirectional extrusion mechanism, the sealing ring is extruded from both sides of the outer diameter, causing the sealing ring to deform inward, so as to further expose any possible defects. In this way, with the dual inspection of inward opening and outward extrusion, it can be ensured that cracks and defects on both the inner and outer sides of the sealing ring can be exposed, thereby ensuring that the sealing ring is fully inspected and ensuring the sealing effect of the sealing ring during subsequent use.

[0050] Please see Figures 1-4 , Figures 7-9 The supporting and pushing mechanism includes a support plate 12 fixed on the bracket 1, and symmetrically arranged cylinders 20 fixed on the support plate 12. A movable plate 21 is fixed on the telescopic end of the cylinders 20. It also includes a lifting assembly and an elastic assembly disposed on the support plate 12 and connected to the movable plate 21. The lifting assembly includes a movable rod 22 fixed on the movable plate 21. A hollow rod 13 that can pass through the through hole 1101 is axially slidable on the movable rod 22. The elastic assembly includes a fixing ring 14 fixed to the end of the hollow rod 13. A spring 23 is sleeved on the movable rod 22. The two ends of the spring 23 abut against the fixing ring 14 and the movable plate 21, respectively.

[0051] Please see Figures 1-4 , Figures 7-9The inner support rotation mechanism includes a straight groove 1301 and a spiral groove 1302 formed on the outer circumference of the hollow rod 13. A sliding sleeve 18 slides axially on the hollow rod 13. A limiting block 2201 is fixed on the movable rod 22 and slides into the straight groove 1301 and the spiral groove 1302. The limiting block 2201 is fixedly connected to the sliding sleeve 18. The inner support rotation mechanism also includes a first connecting rod 15 and a second connecting rod 16 hinged to the outer circumference of the hollow rod 13 and arranged in parallel. A rotating ring 1801 is rotatably mounted on the sliding sleeve 18. A hinge rod 19 is hinged on the rotating ring 1801. The first connecting rod 15, the second connecting rod 16, and the hinge rod 19 are respectively hinged to the positioning arc plate 17.

[0052] An upper camera 9 is fixed on the lifting plate 3, and a lower camera 24 is fixed on the support plate 12.

[0053] In detail, in the initial state, under the action of cylinder 20, the movable plate 21 is positioned at the end of its stroke away from the support plate 12. In this state, the size of the interlocking dimensions of the movable rod 22 and the hollow rod 13 is minimized, that is, the distance between the fixed ring 14 and the movable plate 21 is maximized. The elongation of the spring 23 in its natural state is greater than the maximum distance between the fixed ring 14 and the movable plate 21. Therefore, the spring 23 is in a pre-compressed state and always provides a thrust to the fixed ring 14 in the direction away from the movable plate 21. Under the action of the movable plate 21, the movable rod 22 controls the limiting block 2201 to be positioned far from the straight groove 1301. At the end of the stroke on the side away from the spiral groove 1302, the sliding sleeve 18 is controlled to be located at the end of the stroke in the direction close to the support plate 12. At this time, the sliding sleeve 18 controls the angle between the hinge rod 19 and the hollow rod 13 to be the smallest. Since the first connecting rod 15 and the second connecting rod 16 are combined to form a parallelogram structure, the two positioning arc plates 17 are kept vertical in cooperation with the first connecting rod 15, the second connecting rod 16 and the hinge rod 19, and the distance between the two positioning arc plates 17 is the smallest. In this state, the two positioning arc plates 17 are located below the turntable 11, and the distance between them is less than that between the through holes 1101.

[0054] When the turntable 11 controls the sealing ring to move directly above the hollow rod 13, it means that the sealing ring has arrived at the detection area. At this time, the cylinder 20 is started, driving the movable plate 21 to move synchronously towards the support plate 12. The rise of the movable plate 21 transmits thrust through the spring 23, which is in a pre-compressed state between it and the fixed ring 14. First, it pushes the movable rod 22 and the hollow rod 13 to move synchronously as a whole. Since the two positioning arc plates 17 are in a retracted state in this state, when the hollow rod 13 moves, it will drive the positioning arc plates 17 through the through hole 1101 through the first connecting rod 15 and the second connecting rod 16, and insert them upward into the inner hole of the sealing ring to be tested located on the upper surface of the turntable 11.

[0055] When the fixed ring 14 rises to the position of abutting the support plate 12, the hollow rod 13 stops moving, and under the action of the cylinder 20, the movable plate 21 continues to move. Since the fixed ring 14 and the hollow rod 13 connected to it have been blocked and stopped by the support plate 12, the relative distance between the movable plate 21 and the fixed ring 14 begins to shorten, and the spring 23 will be further compressed.

[0056] At the same time, the movable rod 22 will drive the limiting block 2201 to continue moving, so that the limiting block 2201 slides relative to the hollow rod 13 along the straight groove 1301. Since the limiting block 2201 is fixedly connected to the sliding sleeve 18, the sliding sleeve 18 is driven by the movable rod 22 and begins to slide upward along the axis of the hollow rod 13.

[0057] The sliding sleeve 18 also drives the hinge rod 19 to move through the rotating ring 1801. Since the hollow rod 13 cannot move, and the first connecting rod 15 and the second connecting rod 16 form a parallelogram stable connecting rod group between the hollow rod 13 and the positioning arc plate 17, the axial movement of the hinge rod 19 is converted into the opposite translation of the two positioning arc plates 17 in the horizontal plane. As the sliding sleeve 18 continues to move upward, the two positioning arc plates 17 gradually expand outward from the initial closed state, and their outer arc surfaces press tightly against the inner wall of the sealing ring, thereby smoothly and evenly expanding the sealing ring radially from the inside to the set detection deformation state. At this time, the upper camera 9 and the lower camera 24 can detect the sealing ring in the expanded state.

[0058] Because part of the detection area of ​​the lower camera 24 is blocked, in order to ensure the accuracy of the detection results, it is necessary to control the rotation of the sealing ring so that the blocked position of the sealing ring can also be detected. To this end, when the limiting block 2201 disengages from the straight groove 1301 and enters the spiral groove 1302, under the action of the spiral groove 1302 and the limiting block 2201, the axial translation of the movable rod 22 is forcibly converted into the axial rotation of the hollow rod 13. The hollow rod 13 will control the positioning arc plate 17 to rotate around the movable rod 22 through the first connecting rod 15 and the second connecting rod 16, thereby driving the sealing ring to rotate. In this way, the sealing ring rotates in the open state, so that the entire inner and outer circumferential surface and end face of the sealing ring can be exposed sequentially and without blind spots within the field of view of the upper camera 9 above and the lower camera 24 below, thereby realizing the comprehensive detection of cracks, bubbles, inclusions, uneven deformation and other problems that may exist on the surface and near the surface of the sealing ring.

[0059] After the test is completed, the cylinder 20 controls the movable plate 21 to reset, and the spring 23 is released elastically, so that the position of the hollow rod 13 remains unchanged. At this time, the limiting block 2201 will retract along the trajectory of the spiral groove 1302 into the straight groove 1301. At the same time, the sliding sleeve 18 is controlled to reset to the initial position on the hollow rod 13, so that the two positioning arc plates 17 move towards each other. When the limiting block 2201 returns to the initial position in the straight groove 1301, the hollow rod 13 will move synchronously with the movable rod 22 again, so that the positioning arc plates 17 retract from the through hole 1101. Since the two positioning arc plates 17 are inserted into the inner hole of the sealing ring, the position of the sealing ring can be positioned during the test to prevent the position of the sealing ring from being offset due to the rotation of the turntable 11, thereby ensuring the accuracy of the subsequent bidirectional extrusion mechanism test.

[0060] Please see Figures 1-3 , Figure 5 , Figure 6 The bidirectional extrusion mechanism includes a motor 4 fixed on the lifting plate 3, a bidirectional lead screw 6 rotatably mounted on the lifting plate 3 and connected to the output shaft of the motor 4, a guide assembly connected to the bidirectional lead screw 6 on the lifting plate 3, the guide assembly including a guide rail 5 fixed on the lifting plate 3, threaded sleeves 7 symmetrically arranged threadedly connected to the bidirectional lead screw 6, the threaded sleeves 7 being slidably connected to the guide rails 5, an extrusion disc 8 fixed on the threaded sleeves 7, and a limiting groove 801 formed on the extrusion disc 8.

[0061] Furthermore, in the initial state, under the action of the bidirectional lead screw 6, the two threaded sleeves 7 are located at the end of their strokes in directions away from each other, so that the distance between the two extrusion discs 8 is maximized. In this state, the distance between the two extrusion discs 8 is greater than the outer diameter of the sealing ring, and the distance between the two extrusion discs 8 and the central axis of the through hole 1101 is equal.

[0062] Since the positioning arc plate 17 performs internal support positioning on the sealing ring, the geometric center of the sealing ring placed on the turntable 11 has been forcibly aligned with the central axis of the through hole 1101. After the internal support detection is completed and the positioning arc plate 17 is retracted, the sealing ring can still be stably maintained in the central position, ensuring that it is aligned with the two symmetrically arranged extrusion discs 8.

[0063] When it is necessary to perform extrusion deformation detection on the sealing ring, the motor 4 starts and drives the bidirectional lead screw 6 to rotate. The rotation of the bidirectional lead screw 6, through the opposite threads at its two ends, synchronously drives the two threaded sleeves 7 to slide along the guide rail 5. The guide rail 5 has a guiding function, so that the threaded sleeves 7 will not rotate with the bidirectional lead screw 6 when they move axially along the bidirectional lead screw 6.

[0064] The threaded sleeve 7 also drives the two extrusion discs 8 to move toward each other, causing the limiting grooves 801 on the side walls to gradually approach and eventually capture the sealing ring from both sides. Since the depth of the limiting grooves 801 is greater than the thickness of the sealing ring, when the two extrusion discs 8 move toward each other, the outer circumference of the sealing ring is first guided and completely accommodated into the limiting grooves 801 on both sides. This means that before the sealing ring is subjected to horizontal radial extrusion force, the movement of its upper and lower end faces is constrained by the groove walls of the limiting grooves 801 and the turntable 11. In this way, during the subsequent continuous extrusion process, the sealing ring is forced to deform in a nearly closed planar cavity formed by the limiting grooves 801 on both sides. Its material can only deform and compress radially, thus completely avoiding unexpected complex three-dimensional deformations such as central arching, axial warping or twisting that may be caused by uneven force.

[0065] As the bidirectional lead screw 6 continues to rotate, the extrusion disc 8 will provide a radial pressure of equal magnitude and opposite direction on both outer walls of the sealing ring. Under this constrained extrusion, the sealing ring is forced to produce inward uniform radial compression deformation, simulating its working state when it is pressed by the flange in the sealing groove of the aircraft, thereby effectively exposing the defects of the sealing ring material or structure in this state. At this time, the defects of the sealing ring under bidirectional extrusion can be detected by the upper camera 9 and the lower camera 24.

[0066] In summary, by combining the internal support positioning mechanism with the bidirectional extrusion mechanism, defects in the sealing ring can be detected under both the inner diameter expansion and outer diameter extrusion states, thereby ensuring the accuracy of the sealing ring detection results.

[0067] A bidirectional extrusion testing method for aircraft seals includes the following steps:

[0068] Step 1: Place the sealing ring to be tested on the turntable 11, and control the turntable 11 to rotate intermittently with the rotating rod 10 to move the sealing ring to the position to be tested;

[0069] Step 2: Under the action of the supporting jacking mechanism, the inner support rotation mechanism is driven to move, so that the positioning arc plate 17 passes through the through hole 1101 and is inserted into the sealing ring;

[0070] Step 3: The supporting jacking mechanism will also control the two positioning arc plates 17 to move away from each other through the internal support rotation mechanism, while performing a rotation action;

[0071] Step 4: After the positioning arc plate 17 is reset, the two sides of the sealing ring are squeezed and tested by the bidirectional extrusion mechanism.

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bidirectional compression testing device for aircraft seals, comprising: The bracket, and the fixing plate and lifting plate fixed on the bracket; A rotating rod and a turntable fixed on the rotating rod, the turntable having multiple through holes evenly distributed around the circumference; Its characteristic is that it further includes: A supporting jacking mechanism is provided on the bracket. The supporting jacking mechanism is provided with an inner support rotation mechanism. The inner support rotation mechanism is connected to symmetrically arranged positioning arc plates. The supporting jacking mechanism can adjust the height and spacing of the two positioning arc plates through the inner support rotation mechanism and control the rotation of the positioning arc plates. A bidirectional extrusion mechanism is provided on the lifting plate for extruding and detecting the extrusion of both sides of the sealing ring placed on the turntable; The supporting jacking mechanism includes a support plate fixed on the bracket, and symmetrically arranged cylinders are fixed on the support plate. A movable plate is fixed on the telescopic end of the cylinder. It also includes a lifting assembly and an elastic assembly disposed on the support plate and connected to the movable plate; The lifting assembly includes a movable rod fixed to the movable plate, and the movable rod has a hollow rod that can slide through the through hole in the axial direction; The elastic component includes a fixed ring fixed to the end of the hollow rod, and a spring sleeved on the movable rod, with the two ends of the spring abutting against the fixed ring and the movable plate respectively; The inner support rotation mechanism includes a straight groove and a spiral groove formed on the outer circumference of the hollow rod. A sliding sleeve slides axially on the hollow rod. A limiting block is fixed on the movable rod and slides into the straight groove and the spiral groove. The limiting block is fixedly connected to the sliding sleeve. The inner support rotation mechanism further includes a first connecting rod and a second connecting rod hinged to the outer circumference of the hollow rod and arranged in parallel. A rotating ring is rotatably mounted on the sliding sleeve, and a hinge rod is hinged to the rotating ring. The first connecting rod, the second connecting rod, and the hinge rod are respectively hinged to the positioning arc plate.

2. The bidirectional compression detection device for aircraft sealing rings according to claim 1, characterized in that, The bidirectional extrusion mechanism includes a motor fixed on the lifting plate, a bidirectional lead screw rotatably mounted on the lifting plate and connected to the output shaft of the motor, and a guide assembly connected to the bidirectional lead screw is provided on the lifting plate.

3. The bidirectional compression detection device for aircraft sealing rings according to claim 2, characterized in that, The guiding assembly includes a guide rail fixed to the lifting plate, and threaded sleeves arranged symmetrically connected to the bidirectional lead screw. The threaded sleeves are slidably connected to the guide rail, and an extrusion plate is fixed on the threaded sleeve. A limit groove is formed on the extrusion plate.

4. The bidirectional compression detection device for aircraft sealing rings according to claim 1, characterized in that, An upper camera is fixed on the lifting plate, and a lower camera is fixed on the support plate.

5. A method for bidirectional extrusion testing of aircraft sealing rings, employing the bidirectional extrusion testing device for aircraft sealing rings as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Place the sealing ring to be tested on the turntable, and use the rotating rod to control the turntable to rotate intermittently, so as to move the sealing ring to the position to be tested; Step 2: Under the action of the supporting jacking mechanism, the inner support rotation mechanism is driven to move, so that the positioning arc plate passes through the through hole and is inserted into the sealing ring; Step 3: The supporting jacking mechanism will also control the two positioning arc plates to move away from each other through the internal support rotation mechanism, while simultaneously performing a rotation action; Step 4: After the positioning arc plate is reset, the sealing ring is squeezed and tested on both sides by the bidirectional extrusion mechanism.

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