Turbofan aero-engine first-stage fan blade poking and detecting integrated device

Abstract

The invention relates to the technical field of aviation equipment detection, in particular to a stirring and detecting integrated device for a first-stage fan blade of a turbofan aero-engine. The adjusting device comprises a first adjusting motor and a second adjusting motor, the first adjusting motor is connected with a first lead screw, a lead screw sliding block is assembled on the first lead screw, the second adjusting motor is provided with a sliding block and connected with a second lead screw perpendicular to the first lead screw, and a fixing plate is provided with the second lead screw. The blade detection device comprises a power output rod, a driving motor and a middle rod, the power output rod penetrates through the fixing plate, the driving motor is connected with the middle rod through a universal shaft, and the middle rod is connected with the power output rod through a universal shaft. According to the device, an adjusting device and a detecting device are integrated, parts are reduced, and the structural complexity and cost are reduced; the two adjusting motors drive the lead screw to achieve precise movement of the power output rod, and the power output rod is matched with different fan blades. A lens is installed at the end of the power output rod, synchronous detection is achieved when the fan blades are shifted, the step-by-step process is omitted, the detection period is shortened, efficiency and continuity are improved, and the method is suitable for aero-engine fan blade detection.

Description

Technical Field

[0001] This invention relates to the field of aviation equipment testing technology, and in particular to an integrated device for inspecting the first-stage blades of a turbofan aero-engine. Background Technology

[0002] A turbofan engine, also known as a turbine-driven turbofan engine, is a type of gas turbine aero-engine. Compared to traditional turbojet engines, turbofan engines increase the area of ​​the first-stage blades and incorporate an outer bypass duct structure. The first-stage blades function as both a propeller and a compressor, with the outer portion of the air providing direct thrust through the outer bypass duct of the jet engine, and the inner portion of the air being fed into the combustion chamber through the inner bypass duct, thus providing dual thrust. Therefore, the first-stage blade of a turbofan aero-engine is one of the key components, and the detection of surface defects in the first-stage blades is an important area of ​​aero-engine maintenance and inspection, directly affecting the engine's propulsive efficiency and safety.

[0003] Currently, the industry's technology for detecting surface defects on the first-stage blades of turbofan aero-engines requires a mechanism to rotate the blades around their own axis or adjust their attitude to achieve comprehensive, blind-spot-free inspection of the entire blade surface. However, in existing solutions, the rotation and detection functions are implemented by two separate devices: on the one hand, the rotation mechanism requires a separate design and installation bracket, drive components, and positioning structure to adjust the blade's attitude; on the other hand, the detection mechanism requires additional guide rails, a displacement platform, and calibration modules to achieve precise movement and positioning of the detection components. This separate design not only significantly increases the structural complexity of the overall testing equipment, raising manufacturing costs and floor space requirements, but also necessitates coordinated control and debugging of the rotation and detection mechanisms during the inspection process, prolonging the inspection time and failing to meet the efficiency demands of aviation maintenance scenarios. Summary of the Invention

[0004] To address the technical problems of complex structure, high cost, and low efficiency caused by the independent operation and detection functions in existing technologies, this invention provides an integrated device for the operation and detection of the first-stage blades of a turbofan aero-engine.

[0005] Therefore, the present invention provides the following technical solution: An integrated device for inspecting and detecting the first-stage blades of a turbofan aero-engine includes a housing, an adjustment device, and a blade detection device. The adjustment device includes a first adjustment motor and a second adjustment motor. The first adjustment motor is mounted on the inner wall of the housing, and its output end is connected to a first lead screw. A lead screw slider is threaded onto the first lead screw. The second adjustment motor is mounted on the lead screw slider, and its output end is connected to a second lead screw. The second lead screw is perpendicular to the first lead screw, and a fixing plate is threaded onto the second lead screw. The blade detection device includes a power output rod, a drive motor, and a central rod. The power output rod slides through the fixing plate, and a lens for blade detection is mounted on the end of the power output rod furthest from the central rod. The drive motor is mounted on the inner wall of the housing, and its output end is connected to one end of the central rod via a first universal joint. The other end of the central rod is connected to the end of the power output rod closest to the central rod via a second universal joint.

[0006] Furthermore, the output end of the drive motor is connected to the guide rod via a first universal joint, and the outer wall of the guide rod is provided with strip-shaped guide teeth; the middle rod has a cylindrical structure, and the inner wall of the middle rod is provided with a guide groove that cooperates with the guide teeth, and the middle rod is sleeved on the outside of the guide rod through the guide groove and the guide teeth of the guide rod.

[0007] Furthermore, a rocker arm is installed at the end of the power output rod away from the center rod, the rocker arm being perpendicular to the power output rod, and a lever is installed at the end of the rocker arm away from the power output rod, the lever being parallel to the power output rod.

[0008] Furthermore, the lever is rotatably mounted on the swing arm via a pivot, and the side wall of the lever is provided with continuous toothed grooves along the circumference; a side-view detection lens is installed on the side wall of the lever, outside the area where the toothed grooves are located; a detection motor is installed on the swing arm, and the output end of the detection motor is connected to a gear, which meshes with the circumferential toothed grooves of the lever.

[0009] Furthermore, a forward-looking detection camera is mounted on the end of the lever furthest from the rocker arm. Furthermore, a vision camera is mounted axially at the end of the power output rod furthest from the center rod.

[0010] Furthermore, a guide strip hole is horizontally opened through the front side wall of the housing, and the power output rod passes through the guide strip hole and maintains a sliding fit with the hole wall.

[0011] Furthermore, wheels are mounted on both sides of the housing.

[0012] Advantages and positive effects of the present invention: This invention integrates the adjustment device and the blade detection device into a single housing: the first adjustment motor, second adjustment motor, lead screw slider, and fixing plate of the adjustment device form an organic whole with the power output rod, drive motor, and center rod of the blade detection device, eliminating the need for separate brackets, positioning modules, and mounting bases for the actuation and detection functions. This integrated design not only reduces the number of parts and the complexity of the overall structure but also significantly reduces the equipment's footprint, saving space resources in aviation maintenance scenarios. Furthermore, the integrated structure avoids the calibration process of multiple devices working together in separate equipment, reducing assembly difficulty and manufacturing costs, and enhancing the equipment's practicality and promotional value.

[0013] The first adjusting motor drives the first lead screw to rotate, causing the lead screw slider to move back and forth along the axis of the first lead screw, enabling the power output rod to move closer to or further away from the fan blade. The second adjusting motor drives the second lead screw to rotate, causing the fixed plate and the power output rod to move left and right, allowing precise adjustment of the relative position of the power output rod and the fan blade. Together, they can sequentially achieve a complete cycle of flicking, withdrawing, position adjustment, entering, and flicking again. The adjustment process is achieved through lead screw transmission, resulting in high transmission accuracy and small displacement error. This adapts to the flicking requirements of different models and curvatures of fan blades, solving the problem of inaccurate position control inherent in traditional tracked flicking mechanisms.

[0014] A detection lens is directly mounted on the end of the power output rod furthest from the center rod. When the drive motor moves the power output rod via the first universal joint, the center rod, and the second universal joint, the lens at its end simultaneously captures and inspects the fan blade surface while the power output rod completes the fan blade movement and adjusts its posture. This simultaneous movement and inspection mode eliminates the step-by-step process of first adjusting the posture and then moving the detection component for alignment and inspection, as required by traditional technology. This avoids the waiting and calibration time between the two actions, significantly shortening the inspection cycle for a single fan blade. Furthermore, the lens moves synchronously with the power output rod, maintaining the optimal distance from the fan blade's inspection area, reducing alignment errors during inspection, and further improving inspection efficiency and continuity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an integrated device for inspecting and checking the first-stage blades of a turbofan aero-engine, provided by the present invention.

[0017] Figure 2 This invention provides a schematic diagram of the internal structure of an integrated device for inspecting and checking the first-stage blades of a turbofan aero-engine.

[0018] Figure 3 The present invention provides a structural diagram of an adjustment device for an integrated device for adjusting the first-stage blades of a turbofan aero-engine.

[0019] Figure 4 The diagram shows the structure of a blade inspection device for an integrated device for inspecting the first-stage blades of a turbofan aero-engine, as provided by this invention.

[0020] Figure 5 A schematic diagram of the detection status of an integrated device for detecting the first-stage fan blades of a turbofan aero-engine provided by the present invention. Figure 1 .

[0021] Figure 6 A schematic diagram of the detection status of an integrated device for detecting the first-stage fan blades of a turbofan aero-engine provided by the present invention. Figure 2 .

[0022] Figure 7 A schematic diagram of the detection status of an integrated device for detecting the first-stage fan blades of a turbofan aero-engine provided by the present invention. Figure 3 .

[0023] In the diagram: 1. Adjustment device; 2. Housing; 3. Blade detection device; 400. Vision camera; 121. First adjustment motor; 122. Lead screw slider; 123. First lead screw; 124. Guide gear; 125. Second adjustment motor; 126. Second lead screw; 127. Fixing plate; 128. Gear groove; 129. Swing rod; 101. Drive motor; 102. Power rod; 103. First universal joint; 104. Guide rod; 105. Middle rod; 106. Power output rod; 107. Lever; 108. Gear; 109. Detection motor; 110. Second universal joint; 301. Forward-looking detection camera; 302. Side-looking detection lens; 201. Guide strip hole; 202. Wheel; 5. Turbofan; 501. First-stage fan blade. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0025] This invention provides an integrated device for checking and inspecting the first-stage fan blades of a turbofan aero-engine, such as... Figure 1-4 As shown, the device includes a housing 2, an adjustment device 1, and a blade detection device 3. The adjustment device 1 includes a first adjustment motor 121 and a second adjustment motor 125. The first adjustment motor 121 is installed on the inner wall of the housing 2. The output end of the first adjustment motor 121 is connected to a first lead screw 123. A lead screw slider 122 is threaded onto the first lead screw 123. The second adjustment motor 125 is installed on the lead screw slider 122. The output end of the second adjustment motor 125 is connected to a second lead screw 126. The second lead screw 126 is perpendicular to the first lead screw 123. A fixing plate 127 is threaded onto the second lead screw 126. The blade detection device 3 includes a power output rod 106, a drive motor 101, and a central rod. 105. A power output rod 106 is slidably inserted through a fixed plate 127. A vision camera 400 is axially mounted on the end of the power output rod 106 away from the middle rod 105. A drive motor 101 is mounted on the inner wall of the housing 2. The output end of the drive motor 101 is connected to a power rod 102. The end of the power rod 102 away from the drive motor 101 is connected to a guide rod 104 via a first universal joint 103. A strip-shaped guide tooth 124 is provided on the outer wall of the guide rod 104. The middle rod 105 has a cylindrical structure. The inner wall of the middle rod 105 is provided with a guide groove that mates with the guide tooth 124. The middle rod 105 is fitted onto the outside of the guide rod 104 through the guide groove and the guide tooth 124. A guide strip hole 201 is horizontally opened through the front side wall of the housing 2. The power output rod 106 passes through the guide strip hole 201 and maintains a sliding fit with the hole wall.

[0026] The end of the middle rod 105 away from the guide rod 104 is connected to the end of the power output rod 106 near the middle rod 105 via the second universal joint 110.

[0027] like Figure 1 and Figure 3 As shown, a rocker arm 129 is installed at the end of the power output rod 106 away from the middle rod 105. The rocker arm 129 is perpendicular to the power output rod 106. A lever 107 is rotatably installed at the end of the rocker arm 129 away from the power output rod 106 via a rotating shaft. The lever 107 is parallel to the power output rod 106. The side wall of the lever 107 is provided with continuous toothed grooves 128 along the circumferential direction. A detection motor 109 is installed on the rocker arm 129. The output end of the detection motor 109 is connected to a gear 108, which meshes with the circumferential toothed grooves 128 of the lever 107.

[0028] like Figure 4 As shown, a side-view detection lens 302 is installed on the side wall of the lever 107, outside the area where the tooth groove 128 is located; a front-view detection camera 301 is installed at the end of the lever 107 away from the swing arm 129.

[0029] Wheels 202 are installed on both sides of the housing 2.

[0030] Working principle: such as Figure 5-7 As shown, the wheels 202 installed on both sides of the housing 2 can move the entire device to the inspection station of the turbofan 5. The vision camera 400 can identify the movement path and align the guide strip hole 201 on the front side wall of the device with the first-stage fan blade area of ​​the turbofan 5.

[0031] The first regulating motor 121 starts and drives the first lead screw 123 connected to the output end to rotate. Since the lead screw slider 122 is threadedly engaged with the first lead screw 123, the lead screw slider 122 moves back and forth along the axis of the first lead screw 123, which drives the second regulating motor 125, the second lead screw 126, the fixed plate 127 and the power output rod 106 passing through the fixed plate 127 mounted on the lead screw slider 122 to move back and forth synchronously until the power output rod 106 approaches the blade gap of the turbofan 5.

[0032] The second regulating motor 125 starts and drives the second lead screw 126 connected to the output end to rotate. Since the fixed plate 127 is threadedly engaged with the second lead screw 126, the fixed plate 127 moves left and right along the axis of the second lead screw 126, which drives the power output rod 106 passing through the fixed plate 127 to move left and right synchronously, so that the axis of the power output rod 106 is aligned with the gap between the adjacent first-stage fan blades of the turbofan 5.

[0033] During the forward and backward movement of the power output rod 106, its outer wall maintains a sliding fit with the guide strip hole 201 on the front side wall of the housing 2. The guide strip hole 201 provides horizontal guidance for the movement trajectory of the power output rod 106, preventing it from deviating and ensuring that the power output rod 106 smoothly extends between the adjacent first-stage fan blades 501 of the turbofan 5. Before the power output rod 106 extends between the adjacent first-stage fan blades 501 of the turbofan 5, the end face of the first-stage fan blade 501 near the device is detected by the forward-looking detection camera 301.

[0034] After the power output rod 106 extends between the adjacent first-stage blades of the turbofan 5, the drive motor 101 starts, and the output torque is sequentially transmitted to the power rod 102, the first universal joint 103, and the guide rod 104. Since the strip-shaped guide teeth 124 on the outer wall of the guide rod 104 mesh with the guide groove on the inner wall of the middle rod 105, the rotation of the guide rod 104 drives the middle rod 105 to rotate synchronously. The end of the middle rod 105 away from the guide rod 104 is connected to the power output rod 106 through the second universal joint 110, and the torque is finally transmitted to the power output rod 106, driving the power output rod 106 to rotate.

[0035] When the power output rod 106 rotates, the swing rod 129 mounted on its end away from the central rod 105 rotates synchronously. The lever 107, mounted on the end of the swing rod 129 away from the power output rod 106 via a rotating shaft, contacts the fan blade. As the lever 107 rotates with the swing rod 129, it drives the first-stage fan blade of the turbofan 5 to slowly rotate around its own axis, achieving fan blade attitude adjustment. Simultaneously, the detection motor 109 drives the gear 108 to rotate, which in turn drives the lever 107 to rotate, further driving the side-view detection lens 302 to rotate synchronously, thus enabling the detection of the fan blade sidewall. During the detection process, the fan blade movement and the lens's image acquisition are synchronized, eliminating the need for separate steps. Once the current blade inspection is completed, the first adjustment motor 121 starts again, driving the power output rod 106 to move backward out of the current blade gap; the second adjustment motor 125 starts again, driving the power output rod 106 to move left and right to the next adjacent blade gap, repeating the process of forward and backward adjustment, insertion into the gap, flicking, and inspection, to achieve batch cyclic inspection of the first-stage blades of the WS-5 turbofan. After all fan blades have been inspected, the adjustment device 1 drives the power output rod 106 back to its initial position, the drive motor 101 and the detection motor 109 stop running, and all detection lenses are turned off; the device is then driven away from the inspection station by the wheels 202, completing a complete inspection operation.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for integrated inspection and detection of the first-stage fan blades of a turbofan aero-engine, characterized in that, The device includes a housing (2), an adjustment device (1), and a blade detection device (3). The adjustment device (1) includes a first adjustment motor (121) and a second adjustment motor (125). The first adjustment motor (121) is installed on the inner wall of the housing (2). The output end of the first adjustment motor (121) is connected to a first lead screw (123). A lead screw slider (122) is threaded onto the first lead screw (123). The second adjustment motor (125) is installed on the lead screw slider (122). The output end of the second adjustment motor (125) is connected to a second lead screw (126). The second lead screw (126) is perpendicular to the first lead screw (123). A blade detection device (3) is threaded onto the second lead screw (126). The mounting plate (127) is installed together; the blade detection device (3) includes a power output rod (106), a drive motor (101) and a middle rod (105). The power output rod (106) slides through the mounting plate (127). A lens for blade detection is installed at the end of the power output rod (106) away from the middle rod (105). The drive motor (101) is installed on the inner wall of the housing (2). The output end of the drive motor (101) is connected to one end of the middle rod (105) through the first universal joint (103). The other end of the middle rod (105) is connected to the end of the power output rod (106) near the middle rod (105) through the second universal joint (110).

2. The integrated device for inspecting and checking the first-stage blades of a turbofan aero-engine according to claim 1, characterized in that, The output end of the drive motor (101) is connected to the guide rod (104) through the first universal joint (103). The outer wall of the guide rod (104) is provided with strip-shaped guide teeth (124). The middle rod (105) has a cylindrical structure. The inner wall of the middle rod (105) is provided with a guide groove that cooperates with the guide teeth (124). The middle rod (105) cooperates with the guide teeth (124) of the guide rod (104) through the guide groove and is sleeved on the outside of the guide rod (104).

3. The integrated device for inspecting and checking the first-stage blades of a turbofan aero-engine according to claim 1, characterized in that, A swing arm (129) is installed at the end of the power output rod (106) away from the center rod (105). The swing arm (129) is perpendicular to the power output rod (106). A lever (107) is installed at the end of the swing arm (129) away from the power output rod (106). The lever (107) is parallel to the power output rod (106).

4. The integrated device for inspecting and checking the first-stage blades of a turbofan aero-engine according to claim 3, characterized in that, The lever (107) is rotatably mounted on the swing arm (129) via a rotating shaft. The side wall of the lever (107) is provided with continuous toothed grooves (128) along the circumferential direction. A side-view detection lens (302) is installed on the side wall of the lever (107) at a position outside the area where the toothed grooves (128) are located. A detection motor (109) is installed on the swing arm (129). The output end of the detection motor (109) is connected to a gear (108), which meshes with the circumferential toothed grooves (128) of the lever (107).

5. The integrated device for inspecting and checking the first-stage fan blades of a turbofan aero-engine according to claim 4, characterized in that, A forward-looking detection camera (301) is installed at the end of the lever (107) away from the swing arm (129).

6. The integrated device for inspecting and checking the first-stage fan blades of a turbofan aero-engine according to claim 1, characterized in that, A vision camera (400) is mounted axially at the end of the power output rod (106) away from the middle rod (105).

7. The integrated device for inspecting and checking the first-stage fan blades of a turbofan aero-engine according to claim 1, characterized in that, A guide strip hole (201) is horizontally opened on the front side wall of the housing (2), and the power output rod (106) passes through the guide strip hole (201) and maintains a sliding fit with the hole wall.

8. The integrated device for inspecting and checking the first-stage fan blades of a turbofan aero-engine according to claim 1, characterized in that, Wheels (202) are mounted on both sides of the housing (2).

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