Turbine blade nondestructive testing device

Abstract

The utility model belongs to the technical field of steam turbine blade detection, and particularly relates to a steam turbine blade nondestructive testing device which comprises supporting plates, a guide rod is fixedly connected between two supporting plates, a threaded rod is rotatably installed between the other two supporting plates, movable plates are installed on the outer sides of the threaded rod and the guide rod in a matched mode, and the movable plates are fixedly connected with the guide rod. An annular groove is formed in the installation ring, a sliding block is slidably installed in the annular groove, a gear is installed at the output end of the stepping motor, a plurality of teeth are installed on the inner side of the installation ring at equal intervals, and an ultrasonic probe is installed on the bottom side of the sliding block. After the control panel receives a signal of a trigger, a driving motor is started, a threaded rod is driven to rotate, a movable plate horizontally moves along a guide rod, then an ultrasonic probe is driven to horizontally move, a stepping motor is started, a gear is driven to rotate, a sliding block slides in an annular groove, and therefore the ultrasonic probe is driven to move in the circumferential direction; the comprehensive nondestructive testing of the turbine blade is realized, and the accuracy and integrity of the detection result are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam turbine blade detection technical field, concretely is a kind of steam turbine blade nondestructive testing device. BACKGROUND

[0002] Steam turbine blade is the key component of steam turbine, it is installed on the rotor and static of steam turbine, the surface quality and internal integrity of blade can influence the flow characteristics of steam in blade passage, thus need to carry out nondestructive testing to steam turbine blade, thus need to use a kind of nondestructive testing device.

[0003] One kind of steam turbine blade nondestructive testing device is disclosed in a Chinese patent with authorized announcement number CN117890473A, including L type base, the vertical surface in L type base is rotationally provided with clamping mechanism, L type base is provided with speed reducer motor, L type base is fixed with electric linear slide, the sliding member of electric linear slide is fixedly provided with ultrasonic detection assembly;Ultrasonic detection assembly includes the square shell fixed on the sliding member of electric linear slide, the top of square shell is open structure.This application can move detection to the length direction and width direction of the steam turbine blade being clamped, while cooperating with the two ball bearings on detection seat, can carry out the stable clamping of steam turbine blade, and the compression effect is good.

[0004] But the detection device still has some problems, in actual application, it is inconvenient to carry out comprehensive detection to steam turbine blade, and the defects of part blade area cannot be found, so as to reduce the use performance of blade;Therefore, aiming at the above problems, a kind of steam turbine blade nondestructive testing device is provided. UTILITY MODEL CONTENT

[0005] In order to make up for the deficiencies of the prior art, solve the problems raised in the background art, the utility model provides a kind of steam turbine blade nondestructive testing device.

[0006] The utility model solves its technical problem adopts the technical scheme that the utility model discloses a kind of steam turbine blade nondestructive testing device, including mainboard, two side edges of the mainboard are symmetrically equipped with two support plates, two support plates are fixedly connected with guide rod between them, another two support plates are rotatably installed with threaded rod between them, the side of the support plate is installed with driving motor, the output end of the driving motor is connected with the one end of the threaded rod, the outside of the guide rod of the threaded rod is equipped with movable plate, the one end of the movable plate is jointly installed with mounting ring, the inside of the mounting ring is equipped with annular groove, the inside sliding installation of the annular groove has sliding block, the side of the sliding block is installed with stepper motor, the output end of the stepper motor is installed with gear, the inside of the mounting ring is installed with several teeth at equal intervals, and gear and tooth engage each other, the bottom side of the sliding block is installed with ultrasonic probe, realize that ultrasonic probe can slide in mounting ring and above mainboard, realize the comprehensive nondestructive testing of steam turbine blade, ensure the accuracy and integrity of detection result.

[0007] Preferably, the side of the mainboard is installed with servo motor, the output end of the servo motor is installed with bidirectional screw rod, the outside of the bidirectional screw rod is threadedly connected with moving plate at both ends, the inside of the both sides of the mainboard is equipped with sliding slot, the both ends of the moving plate are slidingly installed in the inside of sliding slot respectively, the top side of the moving plate is installed with connecting plate, realize the adaptation to steam turbine blade of different lengths.

[0008] Preferably, the top side of the connecting plate is installed with connecting ring, the inside of the connecting ring is installed with three air cylinders at equal intervals, the acting end of the air cylinder is installed with acting rod, the one end of the acting rod is installed with arc-shaped clamping plate, realize that the both ends of steam turbine blade shaft are clamped and fixed, ensure the stability during detection, avoid that blade shaking influences detection result.

[0009] Preferably, recess is formed in the inside of one of the acting rods and penetrates the arc-shaped clamping plate, the top side inner wall of the recess is equipped with trigger, the bottom end inside of the recess is slidingly installed with movable rod, the top side of the movable rod is installed with top plate, the bottom end of the movable rod is installed with connecting block, the spring is fixedly connected between the top plate and the middle end of the recess, and the spring is sleeved on the outside of the movable rod, when the top plate is pushed to contact the trigger by the spring, it indicates that the blade has been clamped in place, and the detection operation can be started.

[0010] Preferably, the trigger is located directly below the top plate, and the connecting block is located on the inside of the arc-shaped clamping plate, so as to facilitate the trigger operation.

[0011] Preferably, one side of the main plate is provided with a control panel, which is electrically connected with the trigger, the stepping motor and the driving motor, and the air cylinder and the ultrasonic probe, wherein the signal transmission for the trigger and the operation control for the stepping motor and the driving motor and the air cylinder and the ultrasonic probe improve the automation degree and the detection efficiency of the device.

[0012] The utility model discloses the beneficial effect that:

[0013] 1. The utility model discloses the control panel receives the signal of trigger, starts driving motor, drives screw rod rotation, makes the movable plate can along with the guide rod horizontal removal, and then drives the mounting ring and the ultrasonic probe of slider installation in the horizontal movement above the main plate, starts the stepping motor, and the stepping motor drives the rotation of gear, because the gear and the tooth interlock, make the slider slide in the annular groove, thereby drive the ultrasonic probe in the mounting ring circumferential movement, realize the comprehensive nondestructive testing of steam turbine blade, ensure the accuracy and integrity of detection result.

[0014] 2. The utility model discloses according to the length of blade, starts servo motor, and servo motor drives the rotation of bidirectional screw rod, makes two movable plates can be opposite or opposite on bidirectional screw rod and remove, thereby adjusts the position of connecting ring and the blade of being clamped and holds, to adapt to the blade detection demand of different length, subsequently starts the air cylinder, and the acting end of air cylinder promotes the action rod and moves to the blade axle direction, makes the arc clamping plate to the both ends of blade axle clamping and holds and ensures the stability in the detection process, avoids the blade sway and influences detection result. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0016] Figure 1 It is the medium axle side view structure schematic diagram in the utility model;

[0017] Figure 2 It is the main body structure schematic diagram of detection device;

[0018] Figure 3 It is the main plate top side structure schematic diagram;

[0019] Figure 4 It is the rotating structure schematic diagram of detection assembly;

[0020] Figure 5 It is the clamping structure schematic diagram for steam turbine blade.

[0021] In the figure: 1, main plate; 2, support plate; 3, guide rod; 4, threaded rod; 5, drive motor; 6, movable plate; 7, mounting ring; 8, annular groove; 9, sliding block; 10, stepping motor; 11, gear; 12, gear teeth; 13, ultrasonic probe; 14, servo motor; 15, two-way screw rod; 16, moving plate; 17, sliding groove; 18, connecting plate; 19, connecting ring; 20, air cylinder; 21, action rod; 22, arc-shaped clamping plate; 23, groove; 24, trigger; 25, movable rod; 26, top plate; 27, connecting block; 28, spring; 29, control panel. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-4As shown, a turbine blade nondestructive testing device, including the main plate 1, both sides of the main plate 1 are symmetrically installed with two support plates 2, the two support plates 2 are fixedly connected with a guide rod 3, the other two support plates 2 are rotatably installed with a threaded rod 4, one side of the support plate 2 is installed with a drive motor 5, one end of the threaded rod 4 is connected with the output end of the drive motor 5, the outer side of the guide rod 3 of the threaded rod 4 is installed with a movable plate 6, one end of the movable plate 6 is commonly installed with a mounting ring 7, the inside of the mounting ring 7 is provided with an annular groove 8, the inside of the annular groove 8 is slidably installed with a sliding block 9, one side of the sliding block 9 is installed with a stepping motor 10, the output end of the stepping motor 10 is installed with a gear 11, the inside of the mounting ring 7 is equidistantly installed with a plurality of teeth 12, and the gear 11 and the teeth 12 are meshed with each other, and the bottom side of the sliding block 9 is installed with an ultrasonic probe 13; When working, it is inconvenient to detect the turbine blade comprehensively in actual application, which may cause some blade area defects to be not found, thereby reducing the use performance of the blade, after the control panel 29 receives the signal of the trigger 24, the drive motor 5 is started, the drive motor 5 drives the threaded rod 4 to rotate, so that the movable plate 6 can move horizontally along the guide rod 3, and then drives the mounting ring 7 and the ultrasonic probe 13 installed on the sliding block 9 to move horizontally above the main plate 1, realizing detection coverage of different positions in the horizontal direction of the blade, the stepping motor 10 is started, the stepping motor 10 drives the gear 11 to rotate, since the gear 11 and the teeth 12 are meshed with each other, the sliding block 9 slides in the annular groove 8, thereby driving the ultrasonic probe 13 to move circumferentially in the mounting ring 7, realizing detection coverage of different positions in the circumferential direction of the blade, in the moving process of the ultrasonic probe 13, the ultrasonic probe 13 continuously emits ultrasonic waves to the blade and receives the reflected ultrasonic wave signals, the signals are transmitted to the control panel 29, through analysis of the ultrasonic wave signals, whether there is a defect in the blade is judged, and finally the nondestructive testing result of the blade is obtained, realizing that the ultrasonic probe 13 can slide in the mounting ring 7 and above the main plate 1, realizing comprehensive nondestructive testing of the turbine blade, and ensuring the accuracy and integrity of the detection result.

[0024] Please refer to Figure 1 、 2 , 3, 5, one side of the main plate 1 is installed with a servo motor 14, the output end of the servo motor 14 is installed with a bidirectional screw rod 15, the outer sides of both ends of the bidirectional screw rod 15 are threadedly connected with a moving plate 16, both sides of the main plate 1 are internally provided with a sliding groove 17, both ends of the moving plate 16 are slidably installed in the inside of the sliding groove 17, the top side of the moving plate 16 is installed with a connecting plate 18, the top side of the connecting plate 18 is installed with a connecting ring 19, the inside of the connecting ring 19 is equidistantly installed with three air cylinders 20, the acting end of the air cylinder 20 is installed with an acting rod 21, one end of the acting rod 21 is installed with an arc-shaped clamping plate 22;

[0025] The inside of one of the action rods 21 is provided with a groove 23 penetrating through the arc-shaped clamping plate 22, the top side inner wall of the groove 23 is equipped with a trigger 24, the bottom end inside of the groove 23 is movably provided with a movable rod 25, the top side of the movable rod 25 is provided with a top plate 26, the bottom end of the movable rod 25 is provided with a connecting block 27, the spring 28 is fixed between the top plate 26 and the middle end of the groove 23, the spring 28 is sleeved on the outside of the movable rod 25, the trigger 24 is located directly below the top plate 26, and the connecting block 27 is located on the inside of the arc-shaped clamping plate 22, one side of the main plate 1 is provided with a control panel 29; in work, the surface quality and internal integrity of the blade will affect the flow characteristics of the steam in the blade channel, so it is necessary to carry out nondestructive testing on the steam turbine blade, and the stability of the blade needs to be ensured in the detection chamber, the steam turbine blade to be detected is placed in the connecting ring 19, according to the length of the blade, the servo motor 14 is started, the bidirectional screw rod 15 is driven to rotate by the servo motor 14, so that the two moving plates 16 can move relatively or oppositely on the bidirectional screw rod 15, thereby adjusting the position of the connecting ring 19 and the clamped blade to adapt to the detection requirements of blades of different lengths, then the air cylinder 20 is started, the acting end of the air cylinder 20 pushes the action rod 21 to move towards the blade shaft, so that the arc-shaped clamping plate 22 clamps the two ends of the blade shaft, in this process, when the arc-shaped clamping plate 22 contacts the blade shaft and starts to clamp, the blade shaft will generate pressure on the movable rod 25, so that the movable rod 25 moves upward and stretches the spring 28, and the top plate 26 rises, when the blade is clamped in place and the spring 28 is stretched to a certain extent, the top plate 26 contacts the trigger 24, the trigger 24 generates a signal and transmits it to the control panel 29, so as to ensure the stability during detection and avoid the influence of blade shaking on the detection result, wherein the specific model of the trigger 24 is E2E-X10ME1-Z, and the model of the ultrasonic probe 13 is V103-RT.

[0026] Working principle: place the turbine blade to be detected in the connecting ring 19, according to the length of the blade, start the servo motor 14, the servo motor 14 drives the bidirectional screw rod 15 to rotate, so that the two moving plates 16 can move relatively or oppositely on the bidirectional screw rod 15, thereby adjusting the position of the connecting ring 19 and the clamped blade to adapt to the detection requirements of blades of different lengths, then start the air cylinder 20, the acting end of the air cylinder 20 pushes the acting rod 21 to move towards the blade shaft, so that the arc-shaped clamping plate 22 clamps the two ends of the blade shaft, in this process, when the arc-shaped clamping plate 22 contacts the blade shaft and starts to clamp, the blade shaft will generate pressure on the movable rod 25, causing the movable rod 25 to move upwards, stretching the spring 28, the top plate 26 rises accordingly, when the blade is clamped in place and the spring 28 is stretched to a certain extent, the top plate 26 contacts the trigger 24, the trigger 24 generates a signal and transmits it to the control panel 29, ensuring the stability during detection and avoiding the influence of blade shaking on the detection result;

[0027] After the control panel 29 receives the signal of the trigger 24, the driving motor 5 is started, the driving motor 5 drives the threaded rod 4 to rotate, so that the movable plate 6 can move horizontally along the guide rod 3, thereby driving the mounting ring 7 and the ultrasonic probe 13 mounted on the sliding block 9 to move horizontally above the main plate 1, realizing detection coverage of different positions in the horizontal direction of the blade, the stepping motor 10 is started, the stepping motor 10 drives the gear 11 to rotate, since the gear 11 is meshed with the gear teeth 12, the sliding block 9 slides in the annular groove 8, thereby driving the ultrasonic probe 13 to move circumferentially in the mounting ring 7, realizing detection coverage of different positions in the circumferential direction of the blade, in the moving process of the ultrasonic probe 13, the ultrasonic probe 13 continuously emits ultrasonic waves to the blade and receives the reflected ultrasonic wave signals, the signals are transmitted to the control panel 29, through analysis of the ultrasonic wave signals, it is judged whether there is a defect in the blade, and finally the non-destructive testing result of the blade is obtained, realizing that the ultrasonic probe 13 can slide in the mounting ring 7 and above the main plate 1, realizing comprehensive non-destructive testing of the turbine blade, ensuring the accuracy and integrity of the detection result.

[0028] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A non-destructive testing device for steam turbine blades, characterized in that: Including the mainboard (1), both side edges of the mainboard (1) are symmetrically provided with two support plates (2), a guide rod (3) is fixedly connected between the two support plates (2), and another two support plates (2) are rotatably provided with threaded rods (4), one side of the support plate (2) is provided with a driving motor (5), one end of the threaded rod (4) is connected with the output end of the driving motor (5), the outer side of the guide rod (3) of the threaded rod (4) is provided with a movable plate (6), one end of the movable plate (6) is commonly provided with a mounting ring (7), the inside of the mounting ring (7) is provided with an annular groove (8), the inside of the annular groove (8) is slidably provided with a sliding block (9), one side of the sliding block (9) is provided with a stepping motor (10), the output end of the stepping motor (10) is provided with a gear (11), the inside of the mounting ring (7) is equidistantly provided with a plurality of teeth (12), and the gear (11) and the teeth (12) are meshed with each other, and the bottom side of the sliding block (9) is provided with an ultrasonic probe (13).

2. A non-destructive testing device for a turbine blade as claimed in claim 1, wherein: One side of the mainboard (1) is provided with a servo motor (14), the output end of the servo motor (14) is provided with a bidirectional screw rod (15), the outer sides of both ends of the bidirectional screw rod (15) are threadedly connected with a moving plate (16), both sides of the mainboard (1) are provided with a sliding groove (17), both ends of the moving plate (16) are slidably installed in the sliding groove (17), and the top side of the moving plate (16) is provided with a connecting plate (18).

3. A non-destructive testing device for a turbine blade as claimed in claim 2, wherein: The top side of the connecting plate (18) is provided with a connecting ring (19), the inside of the connecting ring (19) is equidistantly provided with three air cylinders (20), the acting end of the air cylinder (20) is provided with an acting rod (21), and one end of the acting rod (21) is provided with an arc-shaped clamping plate (22).

4. A non-destructive testing device for a turbine blade as claimed in claim 3, wherein: The inside of one of the acting rods (21) penetrates the arc-shaped clamping plate (22) and is provided with a groove (23), the top side inner wall of the groove (23) is assembled with a trigger (24), the bottom end inside of the groove (23) penetrates and movably installs an active rod (25), the top side of the active rod (25) is provided with a top plate (26), the bottom end of the active rod (25) is provided with a connecting block (27), the spring (28) is sleeved on the outside of the active rod (25).

5. A non-destructive testing device for a turbine blade as claimed in claim 4, wherein: The trigger (24) is located directly below the top plate (26), and the connecting block (27) is located on the inside of the arc-shaped clamping plate (22).

6. A non-destructive testing device for a turbine blade as claimed in claim 5, wherein: One side of the mainboard (1) is provided with a control panel (29), and the control panel (29) is electrically connected between the trigger (24), the stepping motor (10) and the driving motor (5), and the air cylinder (20) and the ultrasonic probe (13), wherein the trigger (24) is used for signal transmission, and the stepping motor (10) and the driving motor (5) and the air cylinder (20) and the ultrasonic probe (13) are used for operation control.

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