A magnetic particle flaw detector for blade detection

Abstract

The present invention discloses a magnetic particle flaw detector for blade detection, which includes: a frame; two magnetic yoke assemblies, oppositely arranged on the frame, for acting on the blade bilaterally and magnetizing the magnetic powder on the surface of the blade; a lifting drive mechanism, arranged on the frame, for adjusting the up-and-down position according to the blade size; a rotation drive mechanism, installed on the lifting drive mechanism, for realizing the circumferential rotation of the blade; a blade clamping mechanism, installed on the rotation drive mechanism and located between the two magnetic yoke assemblies, for realizing reliable clamping of the blade. The above-mentioned magnetic particle flaw detector for blade detection has the advantages of being stable and reliable, simple to operate, high flaw detection efficiency, and low labor intensity. It is suitable for detecting cracks or various minute defects on the surface and near-surface of components made of ferromagnetic materials caused by raw materials, forging, casting, quenching, processing, fatigue, etc. by the wet magnetic particle continuous method. The detection time is significantly shortened and the efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of blade detection, and particularly to a magnetic particle flaw detector for blade detection. Background Art

[0002] The compressor blades of gas turbines have multiple variable cross-sections, with a multi-curved profile, extremely thin blade bodies, and relatively thick tenon parts. The blade tip and intermediate body parts are both curved or inclined surfaces, and the shape is extremely complex. In the industry, magnetic particle testing methods are generally used for flaw detection, but there are the following difficulties in implementing magnetic particle testing on this part: ① It is difficult to achieve 100% coverage with common magnetic particle testing methods; ② When directly clamping the blade and energizing it magnetically, the contact surface is a point or line, with a small contact area, and it is easy to burn the part; ③ When clamping a thin curved part, it is easy to cause the part to deform; ④ The tenon part is an irregular surface, and it is difficult to effectively clamp; ⑤ Methods such as coils and induction methods cannot effectively detect the blade tip and tenon parts; ⑥ The tenon part needs to be separately magnetized after the whole blade is magnetized, and the efficiency is extremely low. Summary of the Invention

[0003] The purpose of the present invention is to provide a magnetic particle flaw detector for blade detection, so as to overcome the above difficulties, improve the detection sensitivity, enhance the detection efficiency and stability, and reduce the damage to the blade.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A magnetic particle flaw detector for blade detection, which includes:

[0006] A frame;

[0007] Two yoke assemblies, oppositely arranged on the frame, for acting on the blade on both sides and magnetizing the magnetic powder on the blade surface;

[0008] A lifting drive mechanism, arranged on the frame, for adjusting the up and down position according to the blade size;

[0009] A rotary drive mechanism, installed on the lifting drive mechanism, for realizing the circumferential rotation of the blade;

[0010] A blade clamping mechanism, installed on the rotary drive mechanism and located between the two yoke assemblies, for realizing reliable clamping of the blade.

[0011] Specifically, the blade fixture mechanism includes a bottom plate, on which two support plates are oppositely arranged. Each support plate is provided with an adjustment hole in the height direction. A long screw rod passes through the adjustment holes of the two support plates. A screw sleeve is sleeved on the long screw rod between the two support plates. The two ends of the long screw rod are respectively limited to the outer sides of the two support plates through locking nuts, so as to lock the height of the screw sleeve. An air-operated clamping assembly is arranged at the top of each support plate. The two air-operated clamping assemblies clamp and fix the blade root and place the blade root horizontally in the two yoke areas. The blade tip abuts against the screw sleeve.

[0012] Specifically, blade inner guard plates are respectively arranged on the inner sides of the two support plates.

[0013] Specifically, the air-operated clamping assembly includes a cylinder, a push plate and a rubber splint. The cylinder is fixed to the outer side of the support plate through a cylinder seat. The push plate is located on the inner side of the support plate. A through copper sleeve is embedded on the support plate. The push rod of the cylinder passes through the through copper sleeve and is fixedly connected to the push plate. The rubber splint is fixed to the surface of the push plate through screws, and rubber plugs are filled in the screw holes.

[0014] Specifically, guide shafts are arranged on both sides of the cylinder seat. Guide holes are correspondingly arranged at both ends of the push plate for the push plate to move along the guide shafts.

[0015] Specifically, the yoke assembly includes a yoke fixing frame, a horizontal guide rail and a T-shaped lead screw. A yoke assembly is arranged on the yoke fixing frame. A translation slider is arranged at the bottom of the yoke fixing frame. Two horizontal guide rails are fixedly arranged on the machine frame in parallel. The translation slider is slidably arranged on the horizontal guide rail. The T-shaped lead screw is supported through a fixed copper sleeve and fixedly arranged on the machine frame parallel to the horizontal guide rail. A lead screw nut is arranged on the translation slider, and the lead screw nut is assembled on the T-shaped lead screw. When the T-shaped lead screw rotates, it drives the yoke fixing frame to move, so as to adjust the distance between the two yoke assemblies.

[0016] Specifically, the yoke assembly further includes a speed reducer, which is fixed to the machine frame. The reduction sprocket on the speed reducer is connected to the lead screw sprocket on the T-shaped lead screw through a chain for transmission.

[0017] Specifically, the lifting drive mechanism includes a lifting screw rod, a lifting slider and a vertical slide rail. The lifting screw rod is vertically rotatably arranged on the machine frame. The vertical slide rail is arranged on the machine frame. The lifting slider is slidably mounted on the vertical slide rail, and the lifting slider is in threaded cooperation with the lifting screw rod. The lifting screw rod is driven by a lifting drive motor to rotate, driving the lifting slider to move up and down along the vertical slide rail.

[0018] Specifically, the rotation drive mechanism includes a rotation drive bracket, a rotation drive motor and a transmission component. The rotation drive bracket is fixedly connected to the lifting slider. The rotation drive motor is installed on the rotation drive mechanism bracket. The rotation drive motor drives the transmission component, and further drives the blade fixture mechanism to rotate.

[0019] In particular, the transmission component is a worm and worm gear mechanism, including a box body and a worm and a worm gear shaft in the box body. One end of the worm is connected to the output shaft of the rotary drive motor, and the other end meshes with the worm gear on the worm gear shaft. The worm gear shaft is connected to the blade fixture mechanism, thereby driving the blade on the blade fixture mechanism to rotate.

[0020] In summary, the beneficial effects of the present invention are as follows. Compared with the prior art, the magnetic particle flaw detector for blade detection has the advantages of being stable and reliable, simple to operate, high flaw detection efficiency, and low labor intensity. It is suitable for detecting cracks or various subtle defects on the surface and near the surface of components made of ferromagnetic materials caused by raw materials, forging, casting, quenching, machining, fatigue, etc. by the wet magnetic particle continuous method. Moreover, this non-contact magnetization of the blade avoids phenomena such as scratching and deformation caused by sparking and blade contact, ensuring the safety of the blade. While ensuring the detection sensitivity, compared with the same type of blades before, the detection time is significantly shortened and the efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0022] Figure 2 is the side view of the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0023] Figure 3 is the top view of the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0024] Figure 4 is the structural schematic diagram of the yoke assembly in the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0025] Figure 5 is the structural schematic diagram of the blade fixture mechanism in the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0026] Figure 6 is the top view of the blade fixture mechanism in the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention;

[0027] Figure 7 is the structural schematic diagram of the worm and worm gear mechanism in the magnetic particle flaw detector for blade detection provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solution of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0029] Please refer to Figures 1 to 7As shown, this embodiment provides a magnetic particle flaw detector for blade inspection, which includes a frame 1, a yoke assembly 2, a lifting drive mechanism 4, a rotation drive mechanism 5 and a blade clamp mechanism 3.

[0030] Two yoke parts 2 are arranged oppositely on the frame 1, and are used to act on the blades on both sides and magnetize the magnetic powder on the surface of the blades. The yoke part 2 includes a yoke fixing frame 7, a horizontal guide rail 9, a T-type screw rod 11 and a reducer 16. The yoke fixing frame 7 is provided with a yoke assembly 8, and a translation slider 6 is arranged at the bottom of the yoke fixing frame 7. The two horizontal guide rails 9 are fixed to the frame 1 in parallel. The translation slider 6 is slidably arranged on the horizontal guide rail 9. The T-type screw rod 11 is supported by a fixed copper sleeve 12 and fixed to the frame 1 in parallel with the horizontal guide rail 9. A screw nut 10 is arranged on the translation slider 6. The screw nut 10 is assembled on the T-type screw rod 11. The T-type screw rod 11 rotates to drive the yoke fixing frame 7 to move, thereby adjusting the spacing between the two yoke parts 2. The reducer 16 is fixed to the frame 1, and the reduction sprocket 15 on the reducer 16 is connected to the screw sprocket 13 on the T-type screw rod 11 through a chain 14.

[0031] The lifting drive mechanism 4 is arranged on the frame 1, and is used to adjust the up and down position according to the size of the blade. The lifting drive mechanism 4 includes a lifting screw 35, a lifting slider 36 and a vertical slide rail 37. The lifting screw 35 is vertically rotatably arranged on the frame 1, the vertical slide rail 37 is arranged on the frame 1, the lifting slider 36 is slidably mounted on the vertical slide rail 37, and the lifting slider 36 is threadedly matched with the lifting screw 35. The lifting screw 35 is driven to rotate by the lifting drive motor 38, and drives the lifting slider 36 to move up and down along the vertical slide rail 37.

[0032] The rotary drive mechanism 5 is mounted on the lifting drive mechanism 4 to realize the circumferential rotation of the blade. The rotary drive mechanism 5 includes a rotary drive bracket 39, a rotary drive motor 40 and a transmission assembly. The rotary drive bracket 39 is fixedly connected to the lifting slider 36. The rotary drive motor 40 is mounted on the rotary drive mechanism 5 bracket. The rotary drive motor 40 drives the transmission assembly, thereby driving the blade clamp mechanism 3 to rotate.

[0033] The transmission assembly is a worm gear mechanism, including a housing 31 and a worm 32 and a worm wheel shaft 33 in the housing 31. One end of the worm 32 is connected to the output shaft of the rotation drive motor 40, and the other end is engaged with the worm wheel 34 on the worm wheel shaft 33. The worm wheel shaft 33 is connected to the blade clamp mechanism 3, thereby driving the blades on the blade clamp mechanism 3 to rotate.

[0034] The blade fixture mechanism 3 is installed on the rotary drive mechanism 5 and is located between the two yoke assemblies 2, and is used to realize reliable clamping of the blade. The blade fixture mechanism 3 includes a bottom plate 17. Two support plates 20 are oppositely arranged on the bottom plate 17. An adjustment hole is opened in each support plate 20 along the height direction. A long screw 22 passes through the adjustment holes of the two support plates 20. A screw sleeve 23 is sleeved on the long screw 22 between the two support plates 20. The two ends of the long screw 22 are respectively limited to the outer sides of the two support plates 20 through locking nuts 21, so as to lock the height of the screw sleeve 23. An air-operated clamping assembly is arranged at the top of each support plate 20. The two air-operated clamping assemblies clamp and fix the blade root and make the blade root horizontally placed in the two yoke areas. The blade tip abuts against the screw sleeve 23. Blade inner guard plates 24 are respectively arranged on the inner sides of the two support plates 20.

[0035] The air-operated clamping assembly includes a cylinder 19, a push plate 27 and a rubberized clamping plate 25. The cylinder 19 is fixed to the outer side of the support plate 20 through a cylinder seat 30. The push plate 27 is located on the inner side of the support plate 20. A through copper sleeve 28 is embedded in the support plate 20. The push rod 29 of the cylinder 19 passes through the through copper sleeve 28 and is fixedly connected to the push plate 27. The rubberized clamping plate 25 is fixed to the surface of the push plate 27 through screws, and a rubber plug 26 is filled in the screw holes. Guide shafts 18 are arranged on both sides of the cylinder seat 30. Guide holes are correspondingly opened at both ends of the push plate 27 for the guide shafts 18, so as to move along the guide shafts 18.

[0036] The lifting drive mechanism 4 drives the rotary drive mechanism 5 to move up and down, thereby driving the blade fixture mechanism 3 to move up and down. The rotary drive mechanism 5 drives the blade fixture mechanism 3 to realize 360-degree rotation. To facilitate adjusting the blade clamping angle, so that the blade can be magnetized at the best position to obtain the best sensitivity. The two yoke assemblies 2 are DC yokes; the working area is located in the middle of the two yoke assemblies 2; during work, the blade is placed on the blade fixture mechanism 3. The blade fixture mechanism 3 is made of non-magnetic oil-resistant materials. The distance between the two yoke assemblies 2 is electrically adjustable according to the blade size, and the adjustment distance is controlled.

[0037] Process flow: Loading -- Spraying -- Magnetizing -- Remagnetizing -- Observing -- Demagnetizing (optional function) -- Rotating 90° -- Spraying -- Magnetizing -- Remagnetizing -- Observing -- Demagnetizing (optional function) -- Unloading.

[0038] While ensuring the detection sensitivity, for the same type of blade, compared with before, the detection time is shortened from 12 minutes per single piece to 3 minutes, and the efficiency is increased by nearly 300%.

[0039] In summary, the above magnetic particle flaw detector for blade detection has the advantages of being stable and reliable, simple to operate, high in flaw detection efficiency, and low in labor intensity. It is applicable to detecting cracks or various minute defects on the surface and near-surface of components made of ferromagnetic materials caused by reasons such as raw materials, forging, casting, quenching, machining, fatigue, etc. by means of the wet magnetic particle continuous method. Moreover, this non-contact magnetization of the blade avoids phenomena such as sparking and scratches and deformations caused by contact with the blade, ensuring the safety of the blade. While ensuring the detection sensitivity, compared with the same type of blades before, the detection time is significantly shortened and the efficiency is greatly improved.

[0040] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A magnetic particle flaw detector for blade detection, characterized in that, Including Frame Two yoke assemblies, oppositely arranged on the frame, for acting on the blades bilaterally and magnetizing the magnetic powder on the blade surface Lifting drive mechanism, arranged on the frame, for adjusting the vertical position according to the blade size Rotary drive mechanism, installed on the lifting drive mechanism, for realizing the circumferential rotation of the blade Blade clamping mechanism, installed on the rotary drive mechanism and located between the two yoke assemblies, for realizing reliable clamping of the blade The lifting drive mechanism includes a lifting screw, a lifting slider and a vertical slide rail. The lifting screw is vertically rotatably arranged on the frame. The vertical slide rail is arranged on the frame. The lifting slider is slidably mounted on the vertical slide rail, and the lifting slider is in threaded cooperation with the lifting screw. The lifting screw is driven to rotate by a lifting drive motor, driving the lifting slider to move up and down along the vertical slide rail The yoke assembly includes a yoke fixing frame, a horizontal guide rail and a T-shaped lead screw. A yoke assembly is arranged on the yoke fixing frame. A translation slider is arranged at the bottom of the yoke fixing frame. Two horizontal guide rails are fixedly arranged on the frame in parallel. The translation slider is slidably arranged on the horizontal guide rail. The T-shaped lead screw is supported by a fixed copper sleeve and fixedly arranged on the frame parallel to the horizontal guide rail. A lead screw nut is arranged on the translation slider, and the lead screw nut is assembled on the T-shaped lead screw. The T-shaped lead screw rotates to drive the yoke fixing frame to move, thereby adjusting the distance between the two yoke assemblies 2. The magnetic particle flaw detector for blade detection according to claim 1, characterized in that: The blade clamping mechanism includes a bottom plate. Two support plates are oppositely arranged on the bottom plate. An adjustment hole is opened in each support plate along the height direction. A long screw passes through the adjustment holes of the two support plates. A screw sleeve is sleeved on the long screw and located between the two support plates. The two ends of the long screw are respectively limited outside the two support plates through locking nuts, thereby locking the height of the screw sleeve. An air-operated clamping assembly is arranged at the top of each support plate. The two air-operated clamping assemblies clamp and fix the blade root and make the blade root horizontally placed in the two yoke areas. The blade tip abuts against the screw sleeve 3. The magnetic particle flaw detector for blade detection according to claim 2, characterized in that: Blade inner guard plates are respectively arranged on the inner sides of the two support plates 4. The magnetic particle flaw detector for blade detection according to claim 2, characterized in that: The air-operated clamping assembly includes a cylinder, a push plate and a rubberized clamping plate. The cylinder is fixed to the outside of the support plate through a cylinder seat. The push plate is located inside the support plate. A through copper sleeve is embedded in the support plate. The push rod of the cylinder passes through the through copper sleeve and is fixedly connected to the push plate. The rubberized clamping plate is fixed to the surface of the push plate through screws, and a rubber plug is filled in the screw hole 5. The magnetic particle flaw detector for blade detection according to claim 4, characterized in that: Guide shafts are arranged on both sides of the cylinder seat. Guide holes are correspondingly opened at both ends of the push plate for moving along the guide shafts 6. The magnetic particle flaw detector for blade detection according to claim 1, characterized in that: The yoke assembly further includes a reducer. The reducer is fixed to the frame. The reduction sprocket on the reducer is connected to the lead screw sprocket on the T-shaped lead screw through a chain drive 7. The magnetic particle flaw detector for blade detection according to claim 1, characterized in that: The rotation drive mechanism includes a rotation drive bracket, a rotation drive motor, and a transmission component. The rotation drive bracket is fixedly connected to the lifting slider. The rotation drive motor is installed on the rotation drive mechanism bracket. The rotation drive motor drives the transmission component to drive the blade fixture mechanism to rotate.

8. The magnetic particle flaw detector for blade detection according to claim 7, characterized in that: The transmission component is a worm and worm gear mechanism, including a box body and a worm and a worm gear shaft in the box body. One end of the worm is connected to the output shaft of the rotation drive motor, and the other end meshes with the worm gear on the worm gear shaft. The worm gear shaft is connected to the blade fixture mechanism to drive the blade on the blade fixture mechanism to rotate.

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