Surface defect detection equipment for steam turbine blade

Abstract

The invention discloses surface defect detection equipment for steam turbine blades, and belongs to the technical field of steam turbine blade detection.The surface defect detection equipment comprises a detection box and a connecting plate, a cooling box is arranged on one side of the detection box, a temperature control device is arranged outside the cooling box, and a micro compressor is installed on one side of the cooling box; a detection assembly is arranged in the detection box and comprises a support fixedly installed on the inner wall of the detection box, a light source is installed in the support, a high-resolution camera is installed on one side of the support, an industrial personal computer is installed outside the detection box, and a pressure sensor is arranged in a ball. A controller is installed on the outer surface of the detection box, the connecting plate is arranged in the detection box, a plurality of sets of sliding grooves are formed in one side of the connecting plate, and the device solves the problem that current equipment cannot simulate friction detection of the wear resistance of the blade in a low-temperature environment.

Description

Technical Field

[0001] The invention belongs to the technical field of steam turbine blade detection, and in particular relates to surface defect detection equipment for steam turbine blades. Background Art

[0002] Steam turbine blades are key components for steam energy conversion in steam turbines. They are also the most numerous and diverse parts in a steam turbine, accounting for 30%-50% of the total machining volume. During operation, blades not only withstand the static stress generated by centrifugal force during high-speed rotation and the dynamic stress of steam flow, but also withstand high temperatures, corrosion, and erosion. Therefore, blades must have sufficient strength and good profile to ensure safe and economical operation of the turbine. During steam turbine operation, the surface quality of the blades is crucial. Surface defects can lead to reduced blade performance and even cause safety accidents.

[0003] Existing surface defect detection equipment for turbine blades can only perform rough inspections on the surface of the blades, and cannot simulate friction inspection of the blade body after being exposed to a low-temperature environment, resulting in inaccurate inspection accuracy. Therefore, a surface defect detection equipment for turbine blades is provided. During inspection, the blade body is first stored at a low temperature, and then rubbed with different pressures through a friction component to make the inspection data more accurate. Summary of the Invention

[0004] The purpose of the present invention is to provide a surface defect detection device for steam turbine blades in accordance with the existing skidding device, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a surface defect detection device for a steam turbine blade, comprising a detection box, a cooling box provided on one side of the detection box, a temperature control device provided on the outside of the cooling box, and a micro compressor installed on one side of the cooling box; A detection assembly is provided inside the detection box, the detection assembly includes a bracket fixedly mounted on the inner wall of the detection box, a light source is installed inside the bracket, a high-resolution camera is installed on one side of the bracket, an industrial computer is installed outside the detection box, a pressure sensor is provided inside the ball bearing, and a controller is installed on the outer surface of the detection box; A connecting plate is arranged inside the detection box, and multiple sets of slide grooves are opened on one side of the connecting plate. The interior of the slide groove is slidably connected to a connecting frame, and the interior of the connecting frame is rotatably connected to a ball bearing. Multiple sets of second cylinders are installed on the inner wall of one side of the slide groove, and the output end of the second cylinder is fixedly connected to the outer wall of one side of the connecting frame.

[0006] The present invention further describes that a first motor is connected to an outer surface of one side of the detection box by bolts, an output end of the first motor is connected to a rotating shaft, one end of the rotating shaft is connected to an inflatable shaft, an impeller body is sleeved on the outside of the inflatable shaft, and multiple groups of blade bodies are arranged on the outside of the impeller body.

[0007] The present invention further describes that a friction assembly is provided inside the detection box, and the friction assembly includes a transverse guide rail fixedly mounted on an inner wall of one side of the detection box, and one side of the transverse guide rail is fixedly connected to a bidirectional electric guide rail through a sliding module.

[0008] The present invention further describes that two groups of sliding modules are arranged inside one side of the bidirectional electric guide rail, one side of the two groups of sliding modules are fixedly connected to a clamping plate, and one end of the two groups of clamping plates are fixedly connected to a support frame.

[0009] The present invention further describes that a second motor is installed at one end of the top of the two groups of support frames, and the output end of the second motor is connected to a reciprocating screw rod.

[0010] The present invention further describes that one end of the reciprocating screw is connected to the interior of the support frame via a bearing, and the external thread of the reciprocating screw is connected to a threaded sleeve.

[0011] The present invention further describes that a first cylinder is fixedly mounted on one side of the threaded sleeve, and an output end of the first cylinder is fixedly connected to one side of the connecting plate.

[0012] The present invention further describes that two sets of electric slide rails are provided at the bottom end inside the detection box, the tops of the two sets of electric slide rails are fixedly connected with support blocks, and the tops of the support blocks are fixedly installed with electric push rods.

[0013] The present invention further describes that the top of the electric push rod is fixedly connected to a mounting plate, the top of the mounting plate is fixedly connected to a clamping block, electric telescopic rods are fixedly installed on both sides of the clamping block, and the output end of the electric telescopic rod passes through the clamping block and is connected to a clamping plate.

[0014] The present invention further describes that sliding grooves are provided on the outer surfaces of both sides of the cooling box, and a sliding block is slidably connected inside the sliding groove. A hydraulic cylinder is fixedly installed on the top of the cooling box, and the output end of the hydraulic cylinder is fixedly connected to the sliding block, and one side of the sliding block is fixedly connected to a door panel.

[0015] Compared with the existing technology, the beneficial effects achieved by the present invention are as follows: the present invention uses a low-temperature simulated environment to detect the wear resistance of the blade under different working conditions and evaluate the environmental adaptability; A friction component is used, and a working mode of contacting in stages is adopted through the configuration of multiple sets of connecting frames and ball assemblies, which forms intermittent friction movement with the outer surface of the blade body 7. When the previous set of balls completes the predetermined friction stroke, the system will automatically switch to the next set of ball assemblies for subsequent operation. This rotation working mechanism can effectively avoid surface wear failure or cyclic stress fatigue caused by continuous load on a single friction pair, thereby significantly reducing the maintenance frequency of key components, and while ensuring the accuracy of friction processing, it can achieve an extension of the overall service life of the transmission component and an improvement in the economic efficiency of operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention from above; Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle; Figure 4 The present invention Figure 2 Schematic diagram of the enlarged structure of the middle B area; Figure 5 It is a schematic diagram of the three-dimensional structure of the transverse guide rail and the bidirectional electric guide rail of the present invention; Figure 6 This is a schematic structural diagram of the contact state between the ball and the blade body of the present invention; Figure 7 It is a schematic diagram of the partial cross-section structure of the friction component of the present invention; Figure 8 The present invention Figure 7 Schematic diagram of the enlarged structure of the middle C area; Figure 9 It is a schematic structural diagram of the clamping assembly of the present invention; Figure 10 It is a schematic diagram of the three-dimensional structure of the first motor and the inflatable shaft of the present invention.

[0017] Figure: 1, detection box; 2, electric slide; 3, first motor; 4, rotating shaft; 5, air shaft; 6, impeller body; 7, blade body; 8, friction assembly; 801, transverse guide rail; 802, bidirectional electric guide rail; 803, first cylinder; 804, clamping plate; 805, support frame; 806, second motor; 807, reciprocating screw; 808, threaded sleeve; 809, connecting plate; 810, slide groove; 811, connecting frame; 812, ball bearing; 9, second cylinder; 10, detection group Parts; 1001, bracket; 1002, light source; 1003, high-resolution camera; 1004, industrial computer; 1005, pressure sensor; 1006, controller; 11, cooling box; 12, temperature control device; 13, micro compressor; 14, support block; 15, electric push rod; 16, mounting plate; 17, clamping block; 18, electric telescopic rod; 19, splint; 20, sliding groove; 21, sliding block; 22, hydraulic cylinder; 23, door panel; 24, air pressure interface; 25, servo motor. DETAILED DESCRIPTION

[0018] The following is a non-limiting detailed description of the technical solutions of the present invention in conjunction with preferred embodiments and the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0019] See also Figure 1-10The present invention provides a technical solution: a surface defect detection device for steam turbine blades, comprising a detection box 1, two groups of electric slide rails 2 are provided at the bottom end of the detection box 1, a first motor 3 is connected to the outer surface of one side of the detection box 1 by bolts, the output end of the first motor 3 is connected to a rotating shaft 4, the end of the rotating shaft 4 is coaxially connected to an inflatable shaft 5, an impeller body 6 is sleeved on the outer circumferential surface of the inflatable shaft 5, a plurality of groups of blade bodies 7 arranged at equal intervals are uniformly distributed on the radial outer edge of the impeller body 6, a friction assembly 8 is provided inside the detection box 1, the friction assembly 8 includes a transverse guide rail 801 fixedly mounted on the inner wall of one side of the detection box 1, the lateral working surface of the transverse guide rail 801 is rigidly connected by a precision sliding module, and the assembly thereof and the bidirectional electric guide rail 802 constitute a composite transmission mechanism. The inner side of the guide rail of the bidirectional electric guide rail 802 is integrated with two sets of independent sliding modules. The execution end of each module is equipped with a high-precision clamping plate 804 as a terminal actuator. One end of the two sets of clamping plates 804 is fixedly connected to the support frame 805. One end of the two sets of support frames 805 is installed with a second motor 806. The output end of the second motor 806 is connected to a reciprocating screw rod 807. The non-output end of the reciprocating screw rod 807 is connected to the inside of the support frame 805 through a bearing. The external thread of the reciprocating screw rod 807 is connected to a threaded sleeve 808. One end of the threaded sleeve 808 is connected to the outer thread of the reciprocating screw rod 807. A first cylinder 803 is fixedly installed on the side, and the output end of the first cylinder 803 is fixedly connected to a connecting plate 809. One side of the connecting plate 809 is provided with multiple sets of slide grooves 810. The interior of the slide grooves 810 is slidably connected to a connecting frame 811. The interior of the connecting frame 811 is rotatably connected to a ball bearing 812. Multiple sets of second cylinders 9 are installed on the inner wall of one side of the slide grooves 810. The output end of the second cylinder 9 is fixedly connected to the outer wall of one side of the connecting frame 811. The connecting frame 811 can move along the slide grooves 810 to ensure the stability of the connecting frame 811 during movement. When the impeller body 6 is sleeved on the outer surface of the inflatable shaft 5, the air pressure interface 24 of the inflatable shaft 5 is connected to the air inlet source for controlling inflation or exhaust. Compressed air is filled into the inflatable shaft 5 through the air pressure interface 24. The air pressure pushes the rubber airbag or driving bump inside the inflatable shaft 5 to expand outward until it fits tightly against the inner wall of the impeller body 6, so that the impeller body 6 is fixed to the outer surface of the inflatable shaft 5. In addition, it can adapt to impeller bodies 6 with different inner diameters, and has strong versatility. The output end of the first motor 3 is connected to one side of the pneumatic shaft 5. The impeller body 6 is sleeved on the outer surface of the pneumatic shaft 5, and the pneumatic shaft 5 can fix the impeller body 6. When one group of blade bodies 7 of the impeller body 6 is subjected to friction detection, the system drives the first motor 3. The first motor 3 can drive the impeller body 6 and the blade bodies 7 of the pneumatic shaft 5 to rotate simultaneously, so that the undetected blade bodies 7 of the impeller body 6 can be rotated to the area to be detected. There is no need to manually rotate the undetected blade bodies 7 to the area to be detected, thereby reducing manual interference and realizing automatic replacement of the blade body 7 loading detection; The bidirectional electric guide rail 802 and the transverse guide rail 801 are both provided with a servo motor 25. The servo motor 25 at the transverse guide rail 801 can drive the sliding module to move, and the sliding module can drive the bidirectional electric guide rail 802 and the clamping plate 804 to move horizontally according to the preset trajectory. The sliding modules in the bidirectional electric guide rail 802 respectively drive the clamping plates 804 to move vertically toward the middle or both sides at the same time. The two sets of clamping plates 804 can respectively drive the support frame 805 to move, and then remotely drive the second motor 806 on the top of the support frame 805 to run. The output end of the second motor 806 drives the reciprocating screw rod 807 to rotate, and the threaded sleeve 808 rotates. When the threaded sleeve 808 moves, it can drive the connecting plate 80 9 reciprocates, and the first cylinder 803 is started. The output end of the first cylinder 803 can push the connecting plate 809 to move toward the blade body 7, so that the connecting plate 809 tends to fit with the outer surface of the blade body 7. When the connecting plate 809 tends to fit with the outer surface of the blade body 7, the second cylinder 9 is started again. The second cylinder 9 is a compact cylinder with a guide rod. The output end of the second cylinder 9 pushes the connecting frame 811 inside the slide groove 810 to extend out of the outer surface of the connecting plate 809, so that the ball 812 inside the connecting frame 811 fits with the outer surface of the blade body 7, so that the ball 812 can rub the surface of the blade body 7, forming a friction test, that is, the ball 812 installed inside the connecting frame 811 rubs the blade body 7; It should be noted that the multiple sets of connecting frames 811 and ball bearings 812 configured in this structure adopt a phased and sequential contact working mode, forming intermittent friction motion with the outer surface of the blade body 7. When the previous set of ball bearings 812 completes the predetermined friction stroke, the system will automatically switch to the next set of ball bearings 812 for continued operation. This rotation working mechanism can effectively avoid surface wear failure or cyclic stress fatigue caused by continuous load on a single friction pair, thereby significantly reducing the maintenance frequency of key components, while ensuring the accuracy of friction processing, and achieving an extension of the overall service life of the transmission component and an improvement in the economic efficiency of operation and maintenance. A detection assembly 10 is provided inside the detection box 1. The detection assembly 10 includes a bracket 1001 fixedly mounted on the inner wall of the detection box 1. A light source 1002 is installed inside the bracket 1001. A high-resolution camera 1003 is installed on one side of the bracket 1001. An industrial computer 1004 is installed outside the detection box 1. A pressure sensor 1005 is provided inside the ball bearing 812. A controller 1006 is installed on the outer surface of the detection box 1. A cooling box 11 is provided on one side of the detection box 1. A temperature control device 12 is provided on the outside of the cooling box 11. A micro compressor 13 is installed on one side of the cooling box 11. The system controls the micro compressor 13 by regulating the temperature control device 12, and then controls the temperature of the cooling box 11 through the micro compressor 13. The light source 1002 is mounted inside the bracket 1001 and can project uniform light onto the surface of the blade body 7 to highlight scratches on the surface of the blade body 7 caused by friction. The high-resolution camera 1003 is aimed at the surface of the blade body 7 to capture images of the blade body 7 during or after the friction of the ball 812. The camera has an extremely high resolution, such as micron-level pixels, which can capture subtle defects that are difficult to detect with the naked eye. The captured image is transmitted via a data cable to the industrial computer 1004, which uses an image processing algorithm to automatically identify the defect location, shape, and size, and generates a test report that is transmitted to the system. The output end of the second cylinder 9 is connected to the connecting frame 811. The second cylinder 9 is extended and retracted to control the length of the connecting frame 811 and the ball 812 extending from the connecting plate 809, thereby adjusting the contact pressure of the ball 812 on the surface of the blade body 7. The ball 812 is provided with a pressure sensor 1005, which can monitor the contact force in real time and feed the data back to the controller 1006, thereby detecting the surface wear resistance of the blade body 7. By adjusting the contact load of the ball 812 on the blade body 7, defect detection is achieved in stages. When the ball 812 applies a slight contact pressure to the blade body 7, surface scratch defects can be effectively identified; and when a larger contact load is applied, deep crack defects can be detected. This load grading control method realizes the gradient analysis of defect detection, which significantly improves the defect resolution and diagnostic accuracy of the detection system. Different groups of balls 812 are set with different pressures, of which the first group adopts the low-pressure mode, the second group is configured with the medium-pressure mode, and the third group is set with the high-pressure mode. If the ball 812 uses the low-pressure mode to lightly press the blade body 7, the micro-deformation caused by the elastic contact can be accurately captured by the high-resolution camera 1003 for shallow scratches of 0.01-0.03mm on the surface. After the low-pressure mode is lightly pressed, the micro-deformation caused by the elastic contact can be captured by the high-resolution camera 1003 to the blade body 7 If there is a shallow scratch on the surface exceeding 0.01-0.03mm, the quality of the blade body 7 is unqualified. If the ball 812 applies pressure to the blade body 7 in the medium pressure mode, the micro-deformation caused by the elastic contact can be accurately captured by the high-resolution camera 1003. If there is a scratch on the surface of the blade body 7 exceeding 0.03-0.06mm, the quality of the blade body 7 is unqualified. If the ball 812 applies pressure to the blade body 7 in the high pressure mode, the micro-deformation caused by the elastic contact can be accurately captured by the high-resolution camera 1003. If there is a scratch on the surface of the blade body 7 exceeding 0.03-0.06mm, the quality of the blade body 7 is unqualified. If the ball 812 applies pressure to the blade body 7 in the high pressure mode, the micro-deformation caused by the elastic contact can be accurately captured by the high-resolution camera 1003. If there is a scratch on the surface of the blade body 7 exceeding 0.06-0.08mm, the quality of the blade body 7 is unqualified.08mm scratch, the quality of the blade body 7 is unqualified, and an electric control rod is provided on one side of the ball 812, which can drive the ball 812 to rotate. After the ball 812 contacts the blade body 7 through the extension and contraction of the second cylinder 9, in the low-pressure mode, the ball 812 contacts the blade body 7 at a relatively low frequency of 5-10 revolutions per second, and can accurately capture the surface defects of the blade body 7 such as tiny scratches and pits through the high-resolution camera 1003. If in the low-pressure mode, the ball After the ball 812 contacts the blade body 7 at a low frequency speed of 5-10 rpm, a dense micro-crack grid appears on the surface of the blade body 7 captured by the high-resolution camera 1003, and the blade body 7 is unqualified. In the medium pressure mode, the speed of the ball 812 is increased to a medium-high frequency of 15-25 rpm, which can cause defects such as indentations and deep dents on the surface of the blade body 7. If the ball 812 contacts the blade body 7 at a medium-high frequency speed of 15-25 rpm in the medium pressure mode, the high-resolution camera 1003 will detect the presence of a dense micro-crack grid on the surface of the blade body 7. If the camera 1003 detects abnormal flash or burrs on the surface indentation edge of the blade body 7, or even microcracks on the subsurface, the blade body 7 is deemed unqualified. In the heavy pressure mode, the rotation speed of the ball bearing 812 is increased to a high frequency of 25-30 rpm, which can cause cracks on the surface of the blade body 7, or even local deformation. If, in the heavy pressure mode, the ball bearing 812 contacts the blade body 7 at a high frequency of 25-30 rpm, and the high-resolution camera 1003 detects large-scale delamination or penetrating cracks on the surface of the blade body 7, the blade body 7 is deemed unqualified. Simultaneously, the pressure sensor 1005 collects stress distribution data. The detection system intelligently matches the detection mode based on the pressure curve, first scanning the entire surface in low-pressure mode to locate suspected defects, then switching to high-pressure mode to perform stress imaging on the marked area or the entire area. Finally, combined with the defect data obtained by the high-resolution camera 1003, quantitative analysis of the crack depth and direction is achieved, completing a phased investigation from macroscopic anomalies to microscopic defects. The top of the electric slide rail 2 is fixedly connected to a support block 14, the top of the support block 14 is fixedly mounted with an electric push rod 15, the top of the electric push rod 15 is fixedly connected to a mounting plate 16, the top of the mounting plate 16 is fixedly connected to a clamping block 17, both sides of the clamping block 17 are fixedly mounted with electric telescopic rods 18, the output end of the electric telescopic rod 18 passes through the interior of the clamping block 17 and is connected to a clamping plate 19; The system starts the electric push rod 15, so that the clamping block 17 is located on the outside of the impeller body 6, and starts the electric telescopic rod 18 at the clamping block 17, which can push the clamping plate 19 inside the clamping block 17 to move, thereby clamping the outside of the impeller body 6, which can adapt to impeller bodies 6 of different sizes. The support block 14 can drive the upper impeller body 6 to move along the electric slide rail 2, and can automatically clamp the impeller body 6, and can automatically send the impeller body 6 into the cooling box 11 for cooling, or into the detection box 1 for detection. The system clamps the impeller body 6 by regulating the electric telescopic rod 18, and its timely operation does not affect the detection process of the impeller body 6; Sliding grooves 20 are provided on the outer surfaces of both sides of the cooling box 11. Sliding blocks 21 are slidably connected to the interior of the sliding grooves 20. A hydraulic cylinder 22 is fixedly installed on the top of the cooling box 11. The output end of the hydraulic cylinder 22 is fixedly connected to the sliding block 21. A door panel 23 is fixedly connected to one side of the sliding block 21. When the impeller body 6 enters the cooling box 11, the hydraulic cylinder 22 is started, so that the hydraulic cylinder 22 drives the sliding block 21 and the door panel 23 to move downward, and then the temperature control device 12 is used to trigger the micro compressor 13 to start, so that the impeller body 6 inside the cooling box 11 can be low-temperature cooled. Different pressures can be used to rub the blade body 7 after being stored in a low-temperature environment. Finally, the blade body 7 is tested to detect whether the low-temperature environment will affect the blade body 7. This makes the test more comprehensive and can evaluate the performance and reliability of the blade body 7 in different environments. It should be noted that the inflatable shaft 5 and the temperature control device 12 are both existing technologies; Working principle: First, start the electric telescopic rods 18 on both sides of the clamping block 17, so that the output ends of the two sets of electric telescopic rods 18 respectively drive the clamping plates 19 to move, and the two sets of clamping plates 19 move toward the middle at the same time, so that the clamping plates 19 clamp the outer surface of the impeller body 6. The power source can drive the support block 14 and the upper impeller body 6 into the interior of the cooling box 11, start the hydraulic cylinder 22, so that the hydraulic cylinder 22 drives the sliding block 21 and the door panel 23 to move downward, and then use the temperature control device 12 to trigger the micro compressor 13 to start, which can cool the impeller body 6 inside the cooling box 11 at a low temperature. When the impeller body 6 is cooled, the hydraulic cylinder 22 is started again to move the door panel 23 upward, and then the power source is used to make the support block 14 drive the upper impeller body 6 to move downward. The impeller body 6 on the right side enters the interior of the detection box 1, and the electric push rod 15 is started at the same time. The output end of the electric push rod 15 drives the upper impeller body 6 to rise or fall, so that the interior of the impeller body 6 is aligned with the outer surface of the inflatable shaft 5, so that the impeller body 6 can be sleeved on the outer surface of the inflatable shaft 5. Compressed air is filled into the inflatable shaft 5 through the air pressure interface 24. The air pressure pushes the rubber airbag or the driving bump to expand outward until it fits tightly against the inner wall of the impeller body 6, so that the impeller body 6 can be fixed on the outer surface of the inflatable shaft 5. Starting the servo motor 25 at the transverse guide rail 801 can drive the sliding module to move, and push the bidirectional electric guide rail 802 and the clamping plate 804 to move. The clamping plate 804 is provided with two groups, and the two groups of clamping plates 804 The clamping plate 804 can drive the support frame 805 to move, drive the second motor 806, and the output end of the second motor 806 drives the threaded sleeve 808 to rotate. When the threaded sleeve 808 moves, it can drive the connecting plate 809 to move back and forth, and at the same time start the second cylinder 9. The output end of the second cylinder 9 pushes the connecting frame 811 inside the slide 810 to extend out of the outer surface of the connecting plate 809, so that the ball 812 inside the connecting frame 811 fits with the outer surface of the blade body 7, so that the ball 812 can rub the surface of the blade body 7. The length of the connecting frame 811 and the ball 812 extending out of the connecting plate 809 is controlled by the second cylinder 9, so as to adjust the contact pressure of the ball 812 on the surface of the blade body 7. The ball 812 is set There is a pressure sensor 1005, which can monitor the contact force in real time and feed the data back to the controller 1006, so as to detect the surface wear resistance of the blade body 7. The multiple groups of connection frames 811 and balls 812 extend in batches to contact the outer surface of the blade body 7 for friction. When the friction of the group of balls 812 is completed, the next group of balls 812 can be replaced to contact the blade body 7 to avoid excessive use of a single group of balls 812 causing surface wear or mechanical fatigue. Different groups of balls 812 are set with different pressures. If the balls 812 lightly press the blade body 7, surface scratches can be detected. If the balls 812 press heavily on the blade body 7, deep cracks can be detected, so that defects can be checked in stages. The light source 1002 is installed inside the bracket 1001.It can project uniform light onto the surface of the blade body 7 to highlight scratches on the surface of the blade body 7 caused by friction. The high-resolution camera 1003 is aimed at the surface of the blade body 7 and captures images of the blade body 7 during the friction process of the ball 812 or after the friction stops. The camera has extremely high resolution, such as micron-level pixels, which can capture subtle defects that are difficult to detect with the naked eye. The captured image is transmitted to the industrial computer 1004 via a data cable, and an image processing algorithm is used to automatically identify the location, shape, and size of the defect and generate an inspection report. The output end of the first motor 3 is connected to one side of the pneumatic shaft 5. After the inspection of one group of blade bodies 7 of the impeller body 6 is completed, the first motor 3 can drive the pneumatic shaft 5 and the blade body 7 to rotate, thereby reducing manual interference and realizing automatic loading inspection for replacing the blade body 7.

[0020] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the aforementioned embodiments, or that some of the technical features may be replaced with equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A surface defect detection device for steam turbine blades, characterized in that: include: A detection box (1), wherein a cooling box (11) is provided on one side of the detection box (1), a temperature control device (12) is provided outside the cooling box (11), and a micro compressor (13) is installed on one side of the cooling box (11); A detection assembly (10) is provided inside the detection box (1), the detection assembly (10) comprising a bracket (1001) fixedly mounted on the inner wall of the detection box (1), a light source (1002) being mounted inside the bracket (1001), a high-resolution camera (1003) being mounted on one side of the bracket (1001), an industrial computer (1004) being mounted outside the detection box (1), a pressure sensor (1005) being mounted inside the ball bearing (812), and a controller (1006) being mounted on the outer surface of the detection box (1); A connecting plate (809) is provided inside the detection box (1), and a plurality of chute groups (810) are provided on one side of the connecting plate (809), wherein the interior of the chute (810) is slidably connected to a connecting frame (811), and the interior of the connecting frame (811) is rotatably connected to a ball bearing (812), and a plurality of second cylinders (9) are installed on an inner wall of one side of the chute (810), and the output end of the second cylinder (9) is fixedly connected to an outer wall of one side of the connecting frame (811).

2. The surface defect detection device for steam turbine blades according to claim 1, characterized in that: A first motor (3) is connected to an outer surface of one side of the detection box (1) via bolts, an output end of the first motor (3) is connected to a rotating shaft (4), one end of the rotating shaft (4) is connected to an inflatable shaft (5), an impeller body (6) is sleeved on the outside of the inflatable shaft (5), and a plurality of blade bodies (7) are arranged on the outside of the impeller body (6).

3. The surface defect detection device for steam turbine blades according to claim 2, characterized in that: A friction assembly (8) is provided inside the detection box (1), and the friction assembly (8) comprises a transverse guide rail (801) fixedly mounted on an inner wall of one side of the detection box (1), and a bidirectional electric guide rail (802) is fixedly connected to one side of the transverse guide rail (801) via a sliding module.

4. The surface defect detection device for steam turbine blades according to claim 3, characterized in that: Two sets of sliding modules are provided inside one side of the bidirectional electric guide rail (802), one side of each set of sliding modules is fixedly connected to a clamping plate (804), and one end of each set of clamping plates (804) is fixedly connected to a support frame (805).

5. The surface defect detection device for steam turbine blades according to claim 4, characterized in that: A second motor (806) is installed at one end of the top of each of the two groups of support frames (805), and a reciprocating screw rod (807) is connected to the output end of the second motor (806).

6. The surface defect detection device for steam turbine blades according to claim 5, characterized in that: One end of the reciprocating screw rod (807) is connected to the interior of the support frame (805) via a bearing, and the external thread of the reciprocating screw rod (807) is connected to a threaded sleeve (808).

7. The surface defect detection device for steam turbine blades according to claim 6, characterized in that: A first cylinder (803) is fixedly mounted on one side of the threaded sleeve (808), and an output end of the first cylinder (803) is fixedly connected to one side of the connecting plate (809).

8. The surface defect detection device for steam turbine blades according to claim 7, characterized in that: Two sets of electric slide rails (2) are provided at the bottom of the interior of the detection box (1), and the tops of the two sets of electric slide rails (2) are fixedly connected to support blocks (14), and the tops of the support blocks (14) are fixedly installed with electric push rods (15).

9. The surface defect detection device for steam turbine blades according to claim 8, characterized in that: The top of the electric push rod (15) is fixedly connected to a mounting plate (16), the top of the mounting plate (16) is fixedly connected to a clamping block (17), both sides of the clamping block (17) are fixedly mounted with electric telescopic rods (18), and the output end of the electric telescopic rod (18) passes through the clamping block (17) and is connected to a clamping plate (19).

10. The surface defect detection device for steam turbine blades according to claim 1, characterized in that: Sliding grooves (20) are provided on the outer surfaces of both sides of the cooling box (11), and a sliding block (21) is slidably connected inside the sliding groove (20). A hydraulic cylinder (22) is fixedly installed on the top of the cooling box (11), and the output end of the hydraulic cylinder (22) is fixedly connected to the sliding block (21), and a door panel (23) is fixedly connected to one side of the sliding block (21).

Images